:root {
    --bg: #f6f7fb;
    --surface: #ffffff;
    --surface-strong: #eef2f8;
    --border: #dde3ea;
    --text: #172029;
    --muted: #627382;
    --accent: #3b82f6;
    --accent-strong: #2563eb;
    --primary: #6366f1;
    --danger: #ef4444;
    --success: #16a34a;
    --radius: 18px;
    --shadow: 0 24px 80px rgba(15, 23, 42, 0.08);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text);
    background: radial-gradient(circle at top left, rgba(59, 130, 246, 0.12), transparent 28%),
                radial-gradient(circle at bottom right, rgba(59, 130, 246, 0.08), transparent 35%),
                var(--bg);
}

.ui-card {
    border: 1px solid var(--border);
    border-radius: 16px;
    background: var(--surface);
}

.ui-card--interactive {
    transition: border-color .18s ease, box-shadow .18s ease, transform .18s ease;
}

.ui-card--interactive:hover {
    border-color: rgba(59,130,246,.3);
    box-shadow: 0 10px 24px rgba(15,23,42,.08);
    transform: translateY(-1px);
}

.ui-pill {
    display: inline-flex;
    align-items: center;
    gap: .35rem;
    padding: .25rem .65rem;
    border-radius: 999px;
    font-size: .78rem;
    font-weight: 600;
    line-height: 1.2;
}

.ui-pill--accent {
    background: rgba(59,130,246,.1);
    color: var(--accent-strong);
}

.ui-pill--outline,
.ui-pill--neutral {
    background: var(--bg);
    border: 1px solid var(--border);
    color: var(--muted);
}

.ui-pill--warn {
    background: rgba(239,68,68,.1);
    color: var(--danger);
}

.ui-pill--success {
    background: rgba(22,163,74,.12);
    color: var(--success);
}

.ui-pill--danger {
    background: rgba(239,68,68,.12);
    color: var(--danger);
}

.ui-avatar-round {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--_av-bg, var(--accent));
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: .82rem;
    flex-shrink: 0;
    letter-spacing: -.02em;
    overflow: hidden;
}

.ui-avatar-round--sm {
    width: 28px;
    height: 28px;
    font-size: .72rem;
}

.ui-status-text {
    font-weight: 600;
}

.app-shell {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

img {
    max-width: 100%;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

button,
input,
select,
textarea {
    font: inherit;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(221, 227, 234, 0.9);
}

.site-header__inner {
    max-width: 1180px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.brand {
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: -.02em;
    color: var(--text);
}

.site-nav {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
}

.site-nav a,
.link-button {
    color: var(--muted);
    border-radius: 999px;
    padding: 0.7rem 1rem;
    transition: background 0.2s ease, color 0.2s ease;
}

.site-nav a:hover,
.link-button:hover {
    background: rgba(59, 130, 246, 0.08);
    color: var(--text);
}

.link-button {
    background: transparent;
    border: none;
    cursor: pointer;
}

.user-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.65rem 0.85rem;
    border-radius: 999px;
    background: var(--surface-strong);
    color: var(--text);
    border: 1px solid var(--border);
}

.user-badge--button {
    background: var(--surface-strong);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .65rem;
    min-width: 170px;
    padding: .5rem .65rem .5rem .8rem;
    border-radius: 999px;
}

.user-badge--workspace {
    min-width: 210px;
}

.user-badge__meta {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    min-width: 0;
}

.user-badge__name {
    font-weight: 700;
    max-width: 190px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.user-badge__hint {
    font-size: .72rem;
    color: var(--muted);
    line-height: 1;
}

.user-badge__avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--primary-soft);
    color: var(--accent-strong);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: .78rem;
    overflow: hidden;
    border: 1px solid var(--border);
    flex-shrink: 0;
}

.user-badge__avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.account-menu {
    position: relative;
}

.account-panel {
    position: absolute;
    right: 0;
    top: calc(100% + .6rem);
    width: min(380px, 92vw);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    box-shadow: var(--shadow);
    padding: .75rem;
    z-index: 30;
}

.account-panel--hidden {
    display: none;
}

.account-panel__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: .4rem;
}

.account-panel__title {
    margin: 0;
    font-weight: 700;
    font-size: .95rem;
}

.account-panel__close {
    border: 1px solid var(--border);
    background: var(--bg);
    border-radius: 999px;
    width: 1.9rem;
    height: 1.9rem;
    cursor: pointer;
}

.account-panel__list {
    display: flex;
    flex-direction: column;
    gap: .35rem;
}

.account-panel__item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: .55rem .7rem;
    border-radius: 12px;
    background: var(--bg);
    border: 1px solid var(--border);
    text-decoration: none;
    color: var(--text);
    font-size: .86rem;
}

.account-panel__item:hover {
    border-color: var(--primary);
    background: var(--surface);
}

.account-panel__item--muted {
    color: var(--muted);
}

.account-panel__meta {
    margin-top: .15rem;
    margin-left: auto;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: .1rem;
    font-size: .72rem;
    color: var(--muted);
    text-align: right;
    padding: .15rem .25rem;
}

.account-form {
    display: flex;
    flex-direction: column;
    gap: .55rem;
}

.account-form .form-group {
    margin-bottom: 0;
}

.account-form input,
.account-form select {
    width: 100%;
}

.account-page {
    max-width: 860px;
    margin: 0 auto;
}

.account-page__head {
    margin-bottom: 1rem;
}

.so-hero {
    margin-bottom: 1rem;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
}

.so-hero-actions {
    display: flex;
    gap: .5rem;
    flex-wrap: wrap;
}

.so-kpi-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: .65rem;
}

.so-kpi-card {
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: .85rem .95rem;
    background: var(--bg);
    display: flex;
    flex-direction: column;
    gap: .15rem;
}

.so-kpi-label {
    font-size: .74rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: .04em;
}

.so-kpi-value {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--text);
    line-height: 1.1;
}

.so-member-row {
    align-items: center;
}

.so-actions-inline {
    display: flex;
    gap: .45rem;
    flex-wrap: wrap;
}

.so-inline-form {
    display: flex;
    align-items: center;
    gap: .45rem;
    flex-wrap: wrap;
}

.so-inline-form select {
    min-width: 200px;
}

.so-people-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    align-items: start;
}

.so-people-section {
    min-width: 0;
}

.so-directory-shell {
    display: grid;
    grid-template-columns: minmax(250px, 300px) minmax(0, 1fr);
    gap: .85rem;
    min-height: 560px;
}

.so-directory-list {
    display: flex;
    flex-direction: column;
    gap: .55rem;
    max-height: 680px;
    overflow: auto;
    padding-right: .15rem;
}

.so-member-card {
    border: 1px solid var(--border);
    border-radius: 18px;
    background: linear-gradient(180deg, rgba(255,255,255,.98), rgba(246,247,251,.98));
    padding: .85rem;
    display: flex;
    flex-direction: column;
    gap: .55rem;
    text-align: left;
    cursor: pointer;
    transition: border-color .18s ease, box-shadow .18s ease, transform .18s ease;
}

.so-member-card:hover {
    border-color: rgba(59,130,246,.35);
    box-shadow: 0 12px 28px rgba(15,23,42,.08);
    transform: translateY(-1px);
}

.so-member-card.is-active {
    border-color: rgba(59,130,246,.42);
    box-shadow: 0 16px 34px rgba(59,130,246,.14);
}

.so-member-card__top {
    display: flex;
    align-items: center;
    gap: .75rem;
    min-width: 0;
}

.so-member-card__body {
    display: flex;
    flex-direction: column;
    gap: .16rem;
    min-width: 0;
}

.so-member-card__body strong {
    font-size: .92rem;
    line-height: 1.25;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.so-member-card__body span {
    font-size: .78rem;
    color: var(--muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.so-member-card__note {
    font-size: .77rem;
    color: var(--muted);
    line-height: 1.45;
}

.so-member-card__status {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    padding: .22rem .6rem;
    border-radius: 999px;
    font-size: .72rem;
    font-weight: 700;
}

.so-member-card__status.is-active {
    background: rgba(22,163,74,.11);
    color: var(--success);
}

.so-member-card__status.is-inactive {
    background: rgba(239,68,68,.11);
    color: var(--danger);
}

.so-directory-detail {
    border: 1px solid var(--border);
    border-radius: 22px;
    background:
        radial-gradient(circle at top right, rgba(59,130,246,.1), transparent 35%),
        linear-gradient(180deg, rgba(255,255,255,.99), rgba(247,249,252,.99));
    padding: 1rem;
    min-height: 100%;
    display: flex;
    flex-direction: column;
}

.so-directory-empty {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--muted);
    font-size: .92rem;
    line-height: 1.6;
    padding: 1rem;
}

.so-directory-panel {
    display: none;
    flex-direction: column;
    gap: .9rem;
}

.so-directory-panel.is-active {
    display: flex;
}

.so-directory-panel__hero {
    display: flex;
    flex-direction: column;
    gap: .9rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(15,23,42,.08);
}

.so-directory-panel__identity {
    display: flex;
    align-items: center;
    gap: .85rem;
}

.so-directory-panel__identity h3 {
    margin: 0;
    font-size: 1.15rem;
}

.so-directory-panel__identity p {
    margin: .18rem 0 0;
    color: var(--muted);
    font-size: .84rem;
}

.so-directory-panel__chips {
    display: flex;
    flex-wrap: wrap;
    gap: .45rem;
}

.so-detail-section {
    display: flex;
    flex-direction: column;
    gap: .45rem;
}

.so-detail-section__label {
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--muted);
}

.so-detail-actions {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
    margin-top: auto;
}

.so-detail-actions form {
    flex: 1 1 180px;
    min-width: 0;
}

.so-detail-actions .btn {
    width: 100%;
}

.so-slot-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: .7rem;
}

.so-slot-card {
    padding: .85rem;
    gap: .55rem;
}

.so-slot-metrics {
    display: flex;
    flex-wrap: wrap;
    gap: .35rem;
    margin-top: .1rem;
}

.so-slot-metric {
    display: inline-flex;
    align-items: center;
    padding: .24rem .6rem;
    border-radius: 999px;
    background: rgba(15,23,42,.05);
    color: var(--muted);
    font-size: .74rem;
    font-weight: 700;
}

.so-slot-tags {
    margin-top: 0;
}

.td-slot-tag--muted {
    background: rgba(15,23,42,.05);
    color: var(--muted);
}

.so-slot-note {
    font-size: .78rem;
    color: var(--muted);
    line-height: 1.45;
}

.so-slot-actions {
    display: flex;
    flex-wrap: wrap;
    gap: .45rem;
    margin-top: auto;
}

.so-slot-actions form {
    flex: 1 1 150px;
    min-width: 0;
}

.so-slot-actions .btn {
    width: 100%;
}

.so-student-assign-form {
    margin-bottom: .95rem;
    padding: .9rem 1rem;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--surface-strong);
}

.so-admin-hub {
    margin-bottom: 1rem;
}

.so-admin-hub__head {
    align-items: flex-start;
}

.so-admin-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.so-admin-card {
    padding: 1rem;
    border: 1px solid var(--border);
    border-radius: 18px;
    background: var(--surface-strong);
}

.so-admin-card__head {
    margin-bottom: .85rem;
}

.so-admin-card__head h3 {
    margin: 0;
    font-size: 1rem;
}
.sa-slots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: .65rem;
}
.sa-slot-card {
    min-width: 0;
}
.sa-slot-actions {
    margin-top: auto;
    display: flex;
    flex-direction: column;
    gap: .4rem;
}
.sa-slot-form {
    margin: 0;
    width: 100%;
}
.sa-slot-form select,
.sa-slot-form input[type="text"] {
    width: 100%;
    padding: .45rem .65rem;
    border-radius: 10px;
    border: 1px solid rgba(145, 158, 171, 0.28);
    background: var(--surface);
    color: var(--text);
    transition: border-color .2s ease, box-shadow .2s ease;
}
.sa-slot-form select:focus,
.sa-slot-form input[type="text"]:focus {
    outline: none;
    border-color: rgba(59, 130, 246, 0.55);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}
.sa-checkbox-row {
    display: flex;
    align-items: center;
    gap: .4rem;
    font-size: .82rem;
    color: var(--text);
    line-height: 1.3;
}
.sa-checkbox-row input[type="checkbox"] {
    margin: 0;
    flex-shrink: 0;
}
.sa-checkbox-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: .45rem .8rem;
    margin-bottom: .4rem;
}

/* ── Compact inline forms (subjects section) ── */
.sa-dual-forms {
    display: flex;
    flex-wrap: wrap;
    gap: .65rem;
    margin-bottom: 1rem;
}
.sa-compact-form {
    flex: 1 1 240px;
    padding: .75rem;
    border: 1px dashed var(--border);
    border-radius: 12px;
    background: var(--bg);
}
.sa-compact-form__title {
    display: block;
    font-size: .82rem;
    font-weight: 600;
    color: var(--muted);
    margin-bottom: .5rem;
    text-transform: uppercase;
    letter-spacing: .03em;
}
.sa-compact-form__fields {
    display: flex;
    flex-wrap: wrap;
    gap: .4rem;
    align-items: center;
}
.sa-compact-form__fields input,
.sa-compact-form__fields select {
    flex: 1 1 120px;
    min-width: 0;
    padding: .45rem .65rem;
    border-radius: 10px;
    border: 1px solid rgba(145, 158, 171, 0.28);
    background: var(--surface);
    color: var(--text);
    transition: border-color .2s ease, box-shadow .2s ease;
}
.sa-compact-form__fields input:focus,
.sa-compact-form__fields select:focus {
    outline: none;
    border-color: rgba(59, 130, 246, 0.55);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* ── Subject list rows ── */
.sa-subject-list {
    display: flex;
    flex-direction: column;
    gap: .35rem;
}
.sa-subject-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .75rem;
    padding: .55rem .75rem;
    border-radius: 10px;
    background: var(--bg);
    border: 1px solid transparent;
    transition: border-color .15s ease;
}
.sa-subject-row:hover {
    border-color: var(--border);
}
.sa-subject-row__info {
    display: flex;
    flex-direction: column;
    gap: .1rem;
    min-width: 0;
}
.sa-subject-row__title {
    font-weight: 600;
    font-size: .9rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.sa-subject-row__meta {
    font-size: .78rem;
    color: var(--muted);
}
.sa-subject-row__reassign {
    display: flex;
    align-items: center;
    gap: .35rem;
    flex-shrink: 0;
}
.sa-subject-row__reassign select {
    width: auto;
    min-width: 130px;
    font-size: .82rem;
    padding: .35rem .6rem;
    border-radius: 9px;
    border: 1px solid rgba(145, 158, 171, 0.28);
    background: var(--surface);
    color: var(--text);
    transition: border-color .2s ease, box-shadow .2s ease;
}
.sa-subject-row__reassign select:focus {
    outline: none;
    border-color: rgba(59, 130, 246, 0.55);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.so-page {
    max-width: 1360px;
    margin: 0 auto;
}

.so-explorer-section {
    overflow: hidden;
}

.so-explorer-section__head {
    align-items: flex-start;
}

.so-explorer-subhead {
    margin: .45rem 0 0;
    max-width: 72ch;
    color: var(--muted);
    font-size: .92rem;
    line-height: 1.55;
}

.so-explorer-shell {
    display: grid;
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 1rem;
    align-items: start;
    min-height: 0;
}

.so-subject-sidebar {
    min-width: 0;
    position: sticky;
    top: 1rem;
}

.so-subject-grid {
    display: flex;
    flex-direction: column;
    gap: .65rem;
}

.so-subject-card {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 20px;
    background:
        linear-gradient(135deg, rgba(255,255,255,.98) 0%, rgba(244,247,251,.98) 100%),
        var(--surface);
    padding: 1rem 1.05rem;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: .45rem;
    text-align: left;
    cursor: pointer;
    transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}

.so-subject-card:hover {
    transform: translateY(-2px);
    border-color: rgba(59,130,246,.35);
    box-shadow: 0 14px 32px rgba(15,23,42,.08);
}

.so-subject-card.is-active {
    border-color: rgba(59,130,246,.45);
    box-shadow: 0 16px 34px rgba(59,130,246,.14);
}

.so-subject-card--reset {
    border-style: dashed;
}

.so-subject-card--reset .so-subject-card__eyebrow {
    color: var(--accent-strong);
}

.so-subject-card__eyebrow {
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--muted);
}

.so-subject-card__title {
    font-size: 1.05rem;
    line-height: 1.25;
}

.so-subject-card__meta {
    display: block;
    font-size: .8rem;
    line-height: 1.45;
    color: var(--muted);
}

.so-calendar-pane {
    margin-bottom: 1rem;
}

.so-calendar-meta {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
    margin-bottom: .75rem;
}

.so-explorer-main {
    min-width: 0;
    min-height: 640px;
    border: 1px solid rgba(15,23,42,.08);
    border-radius: 24px;
    background:
        radial-gradient(circle at top right, rgba(59,130,246,.12), transparent 34%),
        linear-gradient(180deg, rgba(255,255,255,.98) 0%, rgba(247,249,252,.98) 100%);
    box-shadow: 0 20px 48px rgba(15,23,42,.09);
    padding: 1rem;
}

.so-subject-details {
    margin-top: 1rem;
    min-width: 0;
    border: 1px solid rgba(15,23,42,.08);
    border-radius: 24px;
    background:
        radial-gradient(circle at top left, rgba(59,130,246,.08), transparent 34%),
        linear-gradient(180deg, rgba(255,255,255,.98) 0%, rgba(247,249,252,.98) 100%);
    box-shadow: 0 20px 48px rgba(15,23,42,.08);
    padding: 1rem;
}

.so-subject-stage {
    display: none;
    flex-direction: column;
    gap: 1rem;
    min-height: 100%;
}

.so-subject-stage.is-active {
    display: flex;
}

.so-stage-hero {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(15,23,42,.08);
}

.so-stage-hero h3 {
    margin: 0;
    font-size: 1.4rem;
    line-height: 1.1;
}

.so-stage-hero__meta {
    display: flex;
    flex-wrap: wrap;
    gap: .45rem;
    justify-content: flex-end;
}

.so-stage-hero__meta span {
    display: inline-flex;
    align-items: center;
    padding: .32rem .68rem;
    border-radius: 999px;
    background: rgba(255,255,255,.92);
    border: 1px solid rgba(15,23,42,.08);
    color: var(--muted);
    font-size: .76rem;
    font-weight: 600;
}

.so-stage-layout {
    display: grid;
    grid-template-columns: minmax(230px, 280px) minmax(0, 1fr);
    gap: 1rem;
    align-items: start;
    min-height: 0;
}

.so-detail-stack {
    min-width: 0;
}

.so-inline-actions {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
}

.so-inline-actions form {
    margin: 0;
}

.so-inline-actions--student {
    margin: 0 0 .75rem;
}

.so-cal-legend {
    display: flex;
    flex-wrap: wrap;
    gap: .8rem 1rem;
    margin-top: .8rem;
    font-size: .82rem;
    color: var(--muted);
}

.so-cal-legend span {
    display: inline-flex;
    align-items: center;
    gap: .35rem;
}

.so-drawer {
    display: grid;
    grid-template-columns: 72px minmax(0, 1fr);
    min-height: 640px;
    border: 1px solid rgba(15,23,42,.08);
    border-radius: 24px;
    background:
        radial-gradient(circle at top right, rgba(59,130,246,.12), transparent 34%),
        linear-gradient(180deg, rgba(255,255,255,.98) 0%, rgba(247,249,252,.98) 100%);
    box-shadow: 0 20px 48px rgba(15,23,42,.09);
    overflow: hidden;
}

.so-drawer-handle {
    width: 72px;
    border: none;
    border-right: 1px solid rgba(15,23,42,.08);
    background: linear-gradient(180deg, rgba(59,130,246,.14), rgba(59,130,246,.05));
    padding: 1rem .7rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    color: var(--text);
    cursor: pointer;
}

.so-drawer-handle__label {
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    font-size: .72rem;
    font-weight: 800;
    letter-spacing: .18em;
    text-transform: uppercase;
}

.so-drawer-handle__hint {
    font-size: .72rem;
    color: var(--muted);
    text-align: center;
    line-height: 1.3;
}

.so-drawer-body {
    padding: 1rem;
    opacity: 0;
    transform: translateX(20px);
    transition: opacity .22s ease, transform .22s ease;
    pointer-events: none;
    overflow: hidden;
}

.so-drawer.is-open .so-drawer-body {
    opacity: 1;
    transform: translateX(0);
    pointer-events: auto;
}

.so-drawer-empty {
    min-height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--muted);
    font-size: .94rem;
    line-height: 1.55;
    padding: 2rem;
}

.so-drawer-panel {
    display: none;
    flex-direction: column;
    gap: 1rem;
}

.so-drawer-panel.is-active {
    display: flex;
}

.so-drawer-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    padding-bottom: .9rem;
    border-bottom: 1px solid rgba(15,23,42,.08);
}

.so-drawer-kicker {
    margin: 0 0 .32rem;
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--muted);
}

.so-drawer-head h3 {
    margin: 0;
    font-size: 1.35rem;
    line-height: 1.15;
}

.so-drawer-head__meta {
    display: flex;
    flex-wrap: wrap;
    gap: .45rem;
    justify-content: flex-end;
}

.so-drawer-head__meta span {
    display: inline-flex;
    align-items: center;
    padding: .32rem .68rem;
    border-radius: 999px;
    background: rgba(255,255,255,.92);
    border: 1px solid rgba(15,23,42,.08);
    color: var(--muted);
    font-size: .76rem;
    font-weight: 600;
}

.so-tutor-rail {
    display: flex;
    flex-direction: column;
    gap: .7rem;
    max-height: 520px;
    overflow: auto;
    padding-right: .2rem;
}

.so-tutor-rail--filters {
    margin-top: .85rem;
}

.so-tutor-chip {
    min-width: 0;
    width: 100%;
    border: 1px solid rgba(15,23,42,.08);
    border-radius: 16px;
    padding: .8rem .85rem;
    background: rgba(255,255,255,.9);
    display: flex;
    align-items: center;
    gap: .7rem;
    text-align: left;
    cursor: pointer;
    transition: border-color .18s ease, box-shadow .18s ease, transform .18s ease;
}

.so-tutor-chip:hover {
    transform: translateY(-1px);
    border-color: rgba(59,130,246,.3);
    box-shadow: 0 10px 24px rgba(15,23,42,.08);
}

.so-tutor-chip.is-active {
    border-color: rgba(59,130,246,.42);
    box-shadow: 0 12px 28px rgba(59,130,246,.14);
}

.so-tutor-chip__avatar {
    flex-shrink: 0;
}

.so-tutor-chip__body {
    display: flex;
    flex-direction: column;
    gap: .2rem;
    min-width: 0;
}

.so-tutor-chip__body strong {
    font-size: .9rem;
    line-height: 1.25;
}

.so-tutor-chip__body span {
    color: var(--muted);
    font-size: .77rem;
    line-height: 1.4;
}

.so-tutor-detail {
    display: none;
    flex-direction: column;
    gap: .85rem;
    min-width: 0;
}

.so-tutor-detail.is-active {
    display: flex;
}

.so-student-stack {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: .75rem;
}

.so-student-card {
    border: 1px solid rgba(15,23,42,.08);
    border-radius: 18px;
    background: rgba(246,247,251,.9);
    padding: 1rem;
}

.so-student-card__head {
    display: flex;
    align-items: center;
    gap: .75rem;
    margin-bottom: .85rem;
}

.so-student-card__head h5 {
    margin: 0;
    font-size: .94rem;
}

.so-student-card__head p {
    margin: .15rem 0 0;
    color: var(--muted);
    font-size: .8rem;
}

.so-lesson-list {
    display: flex;
    flex-direction: column;
    gap: .45rem;
}

.so-lesson-row {
    display: grid;
    grid-template-columns: 108px minmax(0, 1fr);
    gap: .75rem;
    align-items: start;
    padding: .7rem .8rem;
    border-radius: 14px;
    background: #fff;
    border: 1px solid rgba(15,23,42,.08);
    transition: border-color .16s ease, box-shadow .16s ease, transform .16s ease;
}

.so-lesson-row:hover {
    border-color: rgba(59,130,246,.3);
    box-shadow: 0 10px 20px rgba(15,23,42,.06);
    transform: translateY(-1px);
    text-decoration: none;
}

.so-lesson-row__time {
    display: flex;
    flex-direction: column;
    gap: .35rem;
    font-size: .78rem;
    font-weight: 700;
    color: var(--muted);
}

.so-lesson-row__date {
    display: block;
}

.so-lesson-row__capsules {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: .25rem;
}

.so-lesson-row__capsules .ls-group-badge {
    position: static;
    top: auto;
    right: auto;
    font-size: .62rem;
    padding: .16rem .46rem;
}

.so-lesson-row__capsules .ls-hw {
    margin-top: 0;
    font-size: .68rem;
    line-height: 1.2;
}

.so-lesson-row__body {
    display: flex;
    flex-direction: column;
    gap: .16rem;
    min-width: 0;
}

.so-lesson-row__body strong {
    font-size: .88rem;
    line-height: 1.35;
}

.so-lesson-row__body span {
    font-size: .78rem;
    color: var(--muted);
    line-height: 1.4;
}

.so-lesson-row__status {
    display: inline;
    font-weight: 600;
}

.so-lesson-row__body span.status-text--scheduled,
.so-lesson-row__status--scheduled {
    color: var(--accent-strong);
}

.so-lesson-row__body span.status-text--conducted,
.so-lesson-row__status--conducted {
    color: var(--success);
}

.so-lesson-row__body span.status-text--canceled,
.so-lesson-row__status--canceled {
    color: var(--danger);
}

.account-form--page {
    gap: .85rem;
}

.account-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: .75rem;
}

@media (max-width: 1200px) {
    .so-slot-grid {
        grid-template-columns: 1fr;
    }

    .so-directory-shell {
        grid-template-columns: 1fr;
        min-height: 0;
    }

    .so-stage-layout {
        grid-template-columns: 1fr;
    }

    .so-tutor-rail {
        max-height: none;
    }
}

@media (max-width: 900px) {
    .so-people-grid {
        grid-template-columns: 1fr;
    }

    .so-admin-grid {
        grid-template-columns: 1fr;
    }

    .sa-checkbox-grid {
        grid-template-columns: 1fr;
    }

    .sa-dual-forms {
        flex-direction: column;
    }

    .sa-subject-row {
        flex-direction: column;
        align-items: flex-start;
    }

    .so-explorer-shell {
        grid-template-columns: 1fr;
    }

    .so-subject-sidebar {
        position: static;
    }

    .so-stage-hero {
        flex-direction: column;
    }
}

.account-grid__full {
    grid-column: 1 / -1;
}

.account-avatar-row {
    display: flex;
    align-items: center;
    gap: .85rem;
    padding: .75rem;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--bg);
}

.account-avatar-preview {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    border: 1px solid var(--border);
    overflow: hidden;
    background: var(--surface-strong);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-strong);
    font-weight: 700;
}

.account-avatar-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.account-avatar-fields {
    flex: 1;
}

.account-file-control {
    margin: 0;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: .35rem;
}

.account-file-hint {
    margin: 0;
    font-size: .76rem;
    color: var(--muted);
}

.account-file-native {
    font-size: .78rem;
    color: var(--muted);
}

.account-file-native--hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    white-space: nowrap;
}

.account-file-name {
    font-size: .78rem;
    color: var(--muted);
}

.account-file-native input[type="file"] {
    max-width: 100%;
}

.account-form--page input,
.account-form--page select {
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: .55rem .65rem;
    background: var(--surface);
}

.account-form--page select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%);
    background-position: calc(100% - 18px) calc(50% - 3px), calc(100% - 12px) calc(50% - 3px);
    background-size: 6px 6px, 6px 6px;
    background-repeat: no-repeat;
    padding-right: 2.2rem;
}

.account-form--page .td-invite-select {
    width: 100%;
}

.account-form--page .td-invite-select__trigger {
    min-height: 40px;
}

.account-form--page .td-invite-select__value {
    font-size: .85rem;
}

.account-form--page .td-invite-select__menu {
    max-height: 260px;
}

.account-password-card {
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: .7rem;
    background: var(--bg);
}

.account-pass-panel {
    margin-top: .55rem;
}

.account-pass-panel--hidden {
    display: none;
}

.account-pass-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: .65rem;
}

.page-main {
    flex: 1;
    padding: 2rem 1rem 3rem;
}

.page-shell {
    max-width: 1160px;
    margin: 0 auto;
}

.container {
    background: var(--surface);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid rgba(221, 227, 234, 0.7);
}

.page-title {
    margin-bottom: 1.25rem;
    font-size: clamp(2rem, 2.5vw, 2.6rem);
    line-height: 1.05;
}

.subtitle {
    color: var(--muted);
    margin-top: 0.5rem;
    line-height: 1.8;
}

.grid {
    display: grid;
    gap: 1rem;
}

.grid-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

@media (max-width: 768px) {
    .grid-2 {
        grid-template-columns: 1fr;
    }
}

.card {
    background: var(--surface-strong);
    border: 1px solid rgba(221, 227, 234, 0.9);
    border-radius: 18px;
    padding: 1.5rem;
}

.card h2 {
    margin-top: 0;
}

.dashboard-summary {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

@media (max-width: 900px) {
    .dashboard-summary {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 620px) {
    .dashboard-summary {
        grid-template-columns: 1fr;
    }
}

.status-chip,
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.45rem 0.75rem;
    border-radius: 999px;
    font-size: 0.85rem;
    font-weight: 600;
}

.status-chip {
    background: #eef6fe;
    color: var(--accent-strong);
}

.badge.success { background: rgba(22, 163, 74, 0.12); color: var(--success); }
.badge.danger { background: rgba(239, 68, 68, 0.12); color: var(--danger); }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.9rem 1.35rem;
    border-radius: 999px;
    border: none;
    background: var(--accent);
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, background 0.2s ease;
}

.btn:hover {
    background: var(--accent-strong);
    transform: translateY(-1px);
}

.btn:disabled {
    cursor: not-allowed;
    opacity: .65;
    transform: none;
}

.btn-secondary {
    background: transparent;
    color: var(--text);
    border: 1px solid rgba(31, 41, 55, 0.12);
}

.btn-secondary:hover {
    background: var(--surface-strong);
}

.btn-block {
    width: 100%;
}

.form-card {
    background: var(--surface-strong);
    border: 1px solid rgba(221, 227, 234, 0.9);
    border-radius: 22px;
    padding: 2rem;
}

.form-group {
    margin-bottom: 1.2rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.55rem;
    color: var(--muted);
    font-size: 0.95rem;
    font-weight: 600;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.95rem 1rem;
    border-radius: 14px;
    border: 1px solid rgba(145, 158, 171, 0.24);
    background: #fff;
    color: var(--text);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: rgba(59, 130, 246, 0.6);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

.errorlist {
    margin: 0.5rem 0 0;
    padding-left: 1.2rem;
    color: var(--danger);
}

.message-list {
    display: grid;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.toast {
    padding: 1rem 1.2rem;
    border-radius: 16px;
    border: 1px solid transparent;
    font-weight: 600;
}

.toast.success { background: #ecfdf5; color: #166534; border-color: rgba(22, 163, 74, 0.24); }
.toast.error { background: #fef2f2; color: #991b1b; border-color: rgba(239, 68, 68, 0.24); }

.table-responsive {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th,
td {
    padding: 1rem 0.9rem;
    text-align: left;
    border-bottom: 1px solid rgba(221, 227, 234, 0.9);
}

th {
    color: var(--muted);
    font-weight: 700;
    letter-spacing: 0.01em;
}

tbody tr:hover {
    background: rgba(59, 130, 246, 0.05);
}

.table-caption {
    color: var(--muted);
    font-size: 0.95rem;
    margin-top: 0.65rem;
}

.section-header {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.section-header h2 {
    margin: 0;
}

.form-checkbox {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 600;
    color: var(--text);
}

.form-checkbox input {
    width: auto;
}

.hero-panel {
    display: grid;
    gap: 1.5rem;
    padding: 2.25rem;
    border-radius: 24px;
    background: linear-gradient(180deg, rgba(59, 130, 246, 0.16), rgba(255, 255, 255, 0.98));
    border: 1px solid rgba(59, 130, 246, 0.14);
    margin-bottom: 1.75rem;
}

.hero-panel h1 {
    margin: 0;
    font-size: clamp(2rem, 2.6vw, 2.8rem);
}

.hero-panel p {
    color: var(--muted);
    line-height: 1.85;
}

.footer-note {
    text-align: center;
    color: rgba(99, 115, 129, 0.85);
    margin-top: 2rem;
}

.footer-text {
    text-align: center;
    padding: 1.5rem 1rem;
    font-size: 0.82rem;
    color: var(--muted);
    border-top: 1px solid var(--border);
}

/* ── Project detail: two-column layout ── */
.pd-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 1.5rem;
    align-items: start;
}

@media (max-width: 860px) {
    .pd-layout {
        grid-template-columns: 1fr;
    }
}

.pd-hidden {
    display: none !important;
}

/* Sidebar */
.pd-sidebar {
    display: flex;
    flex-direction: column;
    gap: .75rem;
}

.pd-sidebar__title {
    margin: 0 0 .25rem;
    font-size: 1rem;
    color: var(--muted);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .05em;
}

.student-card {
    background: var(--surface-strong);
    border: 2px solid var(--border);
    border-radius: 16px;
    padding: 1rem 1.1rem;
    cursor: pointer;
    transition: border-color .18s, background .18s, box-shadow .18s;
    user-select: none;
}

.student-card:hover {
    border-color: var(--accent);
    background: #fff;
    box-shadow: 0 4px 20px rgba(59,130,246,.1);
}

.student-card--active {
    border-color: var(--accent);
    background: #fff;
    box-shadow: 0 4px 24px rgba(59,130,246,.14);
}

.student-card__name {
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: .15rem;
    display: flex;
    align-items: center;
}

.student-card__email {
    font-size: .85rem;
    color: var(--muted);
    margin-bottom: .5rem;
}

.student-card__meta {
    display: flex;
    gap: .4rem;
    flex-wrap: wrap;
}

.meta-pill {
    font-weight: 600;
}

.meta-pill--warn {
    background: rgba(239,68,68,.1);
    color: var(--danger);
}

/* Main panel */
.pd-main {
    min-height: 300px;
}

.pd-empty {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    color: var(--muted);
    font-size: 1.1rem;
    background: var(--surface-strong);
    border-radius: 18px;
    border: 2px dashed var(--border);
}

.pd-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
}

.pd-panel-header h2 {
    margin: 0;
    font-size: 1.35rem;
}

/* Inline lesson form */
.pd-lesson-form {
    background: var(--surface-strong);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 1.25rem 1.5rem;
    margin-bottom: 1.5rem;
}

.pd-form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: .9rem;
}

.form-group--checkbox {
    display: flex;
    align-items: center;
}

.form-group--checkbox label {
    display: flex;
    align-items: center;
    gap: .5rem;
    cursor: pointer;
    font-weight: 600;
    color: var(--text);
    margin: 0;
}

.form-group--checkbox input[type="checkbox"] {
    width: 1.1rem;
    height: 1.1rem;
    accent-color: var(--accent);
}

/* Lesson sticker grid */
.lesson-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1rem;
}

.lesson-sticker {
    display: flex;
    flex-direction: column;
    gap: .35rem;
    background: #fff;
    border: 1.5px solid var(--border);
    border-radius: 18px;
    padding: 1.1rem 1.15rem;
    text-decoration: none;
    color: var(--text);
    transition: box-shadow .18s, transform .18s, border-color .18s;
    position: relative;
    overflow: hidden;
}

.lesson-sticker::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    border-radius: 18px 18px 0 0;
    background: var(--accent);
}

.lesson-sticker--conducted::before { background: var(--success); }
.lesson-sticker--canceled::before  { background: var(--danger); }

.lesson-sticker:hover {
    box-shadow: 0 8px 32px rgba(59,130,246,.13);
    transform: translateY(-2px);
    border-color: var(--accent);
    text-decoration: none;
}

.ls-number {
    font-size: .78rem;
    font-weight: 700;
    color: var(--muted);
    letter-spacing: .05em;
}

.ls-title {
    font-weight: 700;
    font-size: .97rem;
    line-height: 1.3;
}

.ls-date {
    font-size: .82rem;
    color: var(--muted);
}

.ls-duration {
    font-size: .8rem;
    color: var(--muted);
}

.ls-status {
    margin-top: .25rem;
    font-size: .78rem;
    font-weight: 600;
    color: var(--accent-strong);
}

.status-text--scheduled,
.lesson-sticker--scheduled .ls-status {
    color: var(--accent-strong);
}

.status-text--conducted,
.lesson-sticker--conducted .ls-status { color: var(--success); }

.status-text--canceled,
.lesson-sticker--canceled .ls-status  { color: var(--danger); }

.ls-hw {
    font-size: .78rem;
    padding: .2rem .5rem;
    border-radius: 999px;
    background: rgba(59,130,246,.08);
    color: var(--accent-strong);
    align-self: flex-start;
    margin-top: .1rem;
    font-weight: 600;
}

.ls-hw--none, .ls-hw--pending {
    background: rgba(99,115,129,.1);
    color: var(--muted);
}

.ls-hw--under_review {
    background: rgba(234,179,8,.15);
    color: #92400e;
}

.ls-hw--accepted {
    background: rgba(22,163,74,.12);
    color: var(--success);
}

.ls-hw--rejected {
    background: rgba(239,68,68,.1);
    color: var(--danger);
}

.muted-text {
    color: var(--muted);
}

/* ── btn-danger ── */
.btn-danger {
    background: var(--danger);
    color: #fff;
}
.btn-danger:hover {
    background: #dc2626;
    transform: translateY(-1px);
}

/* ────────────────────────────────────────────
   Tutor Dashboard (td-*) styles
──────────────────────────────────────────── */

.td-hidden { display: none !important; }

/* Hero */
.td-hero {
    display: grid;
    grid-template-columns: minmax(240px, 1fr) minmax(320px, 1fr);
    align-items: center;
    gap: 1.5rem;
    padding: 2rem 2.25rem;
    border-radius: 24px;
    background: linear-gradient(135deg, rgba(59,130,246,.14) 0%, rgba(255,255,255,.98) 100%);
    border: 1px solid rgba(59,130,246,.15);
    margin-bottom: 2rem;
}

.td-hero h1 {
    margin: 0;
    font-size: clamp(1.6rem, 2.4vw, 2.4rem);
    letter-spacing: -.02em;
}

.td-hero .subtitle {
    margin: .3rem 0 0;
}

.td-stats {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
    width: 100%;
}

.td-stat {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: center;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: .75rem 1.25rem;
    min-width: 0;
    width: 100%;
    min-height: 94px;
    box-shadow: 0 2px 12px rgba(15,23,42,.05);
}

.td-stat__value {
    display: block;
    width: 100%;
    text-align: center;
    font-size: 1.8rem;
    font-weight: 800;
    line-height: 1;
    color: var(--accent);
    letter-spacing: -.03em;
    font-variant-numeric: tabular-nums;
}

.td-stat__label {
    display: block;
    width: 100%;
    font-size: .78rem;
    color: var(--muted);
    font-weight: 600;
    margin-top: .2rem;
    text-align: center;
}

/* Main 2-col grid */
.td-main-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    align-items: start;
    margin-bottom: 0;
}

@media (max-width: 860px) {
    .td-main-grid { grid-template-columns: 1fr; }
}

/* Section wrapper */
.td-section {
    background: var(--surface-strong);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 1.5rem;
}

.td-section-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
    gap: .75rem;
    position: relative;
    z-index: 1;
}

.td-section-head h2 {
    margin: 0;
    font-size: 1.15rem;
    font-weight: 700;
}

/* Inline create form */
.td-inline-form {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 1rem 1.25rem;
    margin-bottom: 1rem;
}

.td-inline-form:last-child {
    margin-bottom: 0;
}

/* Subjects list */
.td-subjects-list {
    display: flex;
    flex-direction: column;
    gap: .5rem;
}

.td-subject-card {
    display: flex;
    flex-direction: column;
    gap: .45rem;
}

.td-subject-row-wrap {
    position: relative;
}

.td-subject-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: .85rem 3.9rem .85rem 1rem;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 14px;
    text-decoration: none;
    color: var(--text);
    transition: box-shadow .18s, border-color .18s, transform .18s;
}

.td-subject-row:hover {
    border-color: var(--accent);
    box-shadow: 0 4px 18px rgba(59,130,246,.1);
    transform: translateY(-1px);
    text-decoration: none;
}

.td-subject-icon {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.td-subject-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: .1rem;
    min-width: 0;
}

.td-subject-title {
    font-weight: 700;
    font-size: .97rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.td-subject-meta {
    font-size: .82rem;
    color: var(--muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.td-subject-arrow {
    font-size: 1.2rem;
    color: var(--muted);
    transition: color .15s;
}

.td-subject-row:hover .td-subject-arrow {
    color: var(--accent);
}

.td-subject-edit-btn {
    position: absolute;
    top: 50%;
    right: .75rem;
    transform: translateY(-50%);
    width: 34px;
    height: 34px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: #fff;
    color: var(--muted);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: color .15s, border-color .15s, background .15s;
}

.td-subject-edit-btn:hover,
.td-subject-edit-btn[aria-expanded="true"] {
    color: var(--accent);
    border-color: rgba(59,130,246,.25);
    background: rgba(59,130,246,.06);
}

.td-subject-edit-btn svg {
    width: 17px;
    height: 17px;
}

.td-subject-edit-panel {
    padding: .8rem;
}

.td-subject-edit-form {
    display: flex;
    gap: .5rem;
    align-items: center;
    flex-wrap: wrap;
}

.td-subject-edit-form .form-control {
    flex: 1 1 220px;
}

/* ── Calendar ── */
.td-cal-nav-btns {
    display: flex;
    align-items: center;
    gap: .5rem;
}

.td-cal-nav-btn {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 10px;
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    cursor: pointer;
    font-weight: 700;
    color: var(--text);
    transition: background .15s, border-color .15s;
}

.td-cal-nav-btn:hover {
    background: var(--surface-strong);
    border-color: var(--accent);
    color: var(--accent);
}

.td-cal-month-label {
    font-weight: 700;
    font-size: .95rem;
    min-width: 130px;
    text-align: center;
}

.td-calendar {
    user-select: none;
}

.td-cal-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 3px;
}

.td-cal-head {
    text-align: center;
    font-size: .72rem;
    font-weight: 700;
    color: var(--muted);
    padding: .35rem 0;
    text-transform: uppercase;
    letter-spacing: .05em;
}

.td-cal-day {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding: .3rem .2rem;
    border-radius: 10px;
    min-height: 46px;
    cursor: default;
    transition: background .15s;
}

.td-cal-day--empty {
    background: transparent;
}

.td-cal-day--has-lessons {
    cursor: pointer;
    background: rgba(59,130,246,.05);
}

.td-cal-day--has-lessons:hover {
    background: rgba(59,130,246,.12);
}

.td-cal-day--today .td-cal-day-num {
    background: var(--accent);
    color: #fff;
    font-weight: 700;
}

.td-cal-day--active {
    background: rgba(59,130,246,.15) !important;
}

.td-cal-day-num {
    font-size: .82rem;
    font-weight: 600;
    line-height: 1;
    margin-bottom: .2rem;
    min-width: 26px;
    height: 26px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    border-radius: 50%;
}

.td-cal-dots {
    display: flex;
    gap: 2px;
    justify-content: center;
}

.cal-dot {
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
}

.cal-dot--scheduled  { background: var(--accent); }
.cal-dot--conducted  { background: var(--success); }
.cal-dot--canceled   { background: var(--danger); }

/* Calendar popup */
.td-cal-popup {
    margin-top: .75rem;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(15,23,42,.1);
}

.td-cal-popup-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: .75rem 1rem;
    border-bottom: 1px solid var(--border);
    font-weight: 700;
    font-size: .9rem;
}

.td-cal-popup-close {
    background: none;
    border: none;
    cursor: pointer;
    font-size: .85rem;
    color: var(--muted);
    padding: .2rem .4rem;
    border-radius: 6px;
    transition: background .15s;
}

.td-cal-popup-close:hover {
    background: var(--surface-strong);
    color: var(--text);
}

.td-cal-popup-item {
    display: flex;
    align-items: center;
    gap: .75rem;
    padding: .75rem 1rem;
    border-bottom: 1px solid rgba(221,227,234,.5);
    text-decoration: none;
    color: var(--text);
    transition: background .15s;
}

.td-cal-popup-item:last-child { border-bottom: none; }

.td-cal-popup-item:hover {
    background: rgba(59,130,246,.05);
    text-decoration: none;
}

.td-cal-popup-time {
    font-size: .8rem;
    font-weight: 700;
    color: var(--muted);
    min-width: 38px;
}

.td-cal-popup-body {
    display: flex;
    flex-direction: column;
    gap: .05rem;
    flex: 1;
}

.td-cal-popup-title {
    font-weight: 600;
    font-size: .88rem;
}

.td-cal-popup-project {
    font-size: .78rem;
    color: var(--muted);
}

/* ── Slots grid ── */
.td-count-badge {
    font-weight: 700;
    margin-left: .5rem;
    vertical-align: middle;
}

.td-slots-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: .4rem;
}

@media (max-width: 1320px) {
    .td-slots-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (max-width: 1100px) {
    .td-slots-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
    .td-slots-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

.td-slot-card {
    background: #fff;
    border: 1.5px solid var(--border);
    border-radius: 12px;
    padding: .5rem .6rem;
    display: flex;
    flex-direction: column;
    gap: .3rem;
    transition: box-shadow .18s;
    min-width: 0;
}

.td-slot-card:hover {
    box-shadow: 0 6px 24px rgba(15,23,42,.08);
}

.td-slot--occupied { border-color: rgba(59,130,246,.25); }
.td-slot--pending  { border-color: rgba(234,179,8,.35); }
.td-slot--empty    {
    border-style: dashed;
    background: var(--surface-strong);
    justify-content: center;
}

.td-slot-top {
    display: flex;
    gap: .85rem;
    align-items: flex-start;
    min-width: 0;
}

.td-slot-avatar svg,
.td-slot-empty-icon svg {
    width: 17px;
    height: 17px;
}

.td-slot--empty .td-slot-top {
    align-items: center;
}

.td-slot-avatar--pending {
    background: linear-gradient(135deg, #f59e0b, #d97706) !important;
}

.td-slot-info {
    flex: 1;
    min-width: 0;
}

.td-slot-name {
    font-weight: 700;
    font-size: .88rem;
    margin-bottom: .1rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.td-slot-email {
    font-size: .75rem;
    color: var(--muted);
    margin-bottom: .3rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.td-slot--pending .td-slot-name,
.td-slot--pending .td-slot-email {
    white-space: normal;
    overflow: visible;
    text-overflow: clip;
    word-break: break-word;
}

.td-slot-tags {
    display: flex;
    flex-wrap: wrap;
    gap: .3rem;
    margin-top: .15rem;
    align-items: flex-start;
}

.td-slot-tag {
    font-size: .72rem;
    width: auto;
    max-width: 100%;
    white-space: nowrap;
}

.td-slot-actions {
    display: grid;
    grid-template-columns: 42px 42px minmax(0, 1fr);
    gap: .4rem;
    margin-top: auto;
}

.td-slot-footer {
    margin-top: auto !important;
}

.td-slot-actions form,
.td-slot-actions .btn {
    min-width: 0;
}

.td-slot-actions form .btn {
    width: 100%;
}

.td-slot-empty-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px dashed var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 300;
    color: var(--muted);
}

.td-slot-copy-btn,
.td-slot-share-btn {
    padding: 0 .85rem;
    width: 100%;
    min-width: 0;
}

.td-slot-copy-btn svg,
.td-slot-share-btn svg {
    width: 21px;
    height: 21px;
}

.td-slot-actions--top {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-top: .55rem;
}

.td-slot-actions--top .btn {
    justify-content: center;
    min-height: 40px;
}

.td-slot-actions--top .btn .td-slot-btn-label {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.td-slot-actions--top .btn.td-slot-btn--icon-only {
    justify-content: center;
    padding-left: .55rem;
    padding-right: .55rem;
}

.td-slot-actions--top .btn.td-slot-btn--icon-only .td-slot-btn-label {
    display: none;
}

.ld3-lesson-meta-form input[type="text"],
.ld3-lesson-meta-form input[type="datetime-local"] {
    width: 100%;
}

.ld3-info-actions {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

.ld3-lesson-meta-actions {
    display: flex;
    gap: .5rem;
    justify-content: flex-end;
    flex-wrap: wrap;
}

.td-invite-select {
    position: relative;
}

.td-invite-select__trigger {
    width: 100%;
    min-height: 38px;
    border: 1px solid rgba(145,158,171,.24);
    border-radius: 12px;
    background: #fff;
    color: var(--text);
    padding: .45rem .75rem;
    display: inline-flex;
    align-items: center;
    justify-content: space-between;
    gap: .75rem;
    cursor: pointer;
    transition: border-color .2s, box-shadow .2s, background .2s;
}

.td-invite-select__trigger:hover {
    border-color: rgba(59,130,246,.35);
}

.td-invite-select__trigger:focus-visible,
.td-invite-select--open .td-invite-select__trigger {
    outline: none;
    border-color: rgba(59,130,246,.6);
    box-shadow: 0 0 0 4px rgba(59,130,246,.1);
}

.td-invite-select__trigger:disabled {
    cursor: not-allowed;
    background: var(--surface-strong);
    color: var(--muted);
}

.td-invite-select__trigger svg {
    width: 12px;
    height: 8px;
    color: var(--muted);
    flex-shrink: 0;
}

.td-invite-select__value {
    flex: 1;
    min-width: 0;
    font-size: .8rem;
    text-align: left;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.td-invite-select__menu {
    position: absolute;
    top: calc(100% + .35rem);
    left: 0;
    right: 0;
    z-index: 25;
    display: flex;
    flex-direction: column;
    gap: .15rem;
    padding: .35rem;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: #fff;
    box-shadow: 0 12px 32px rgba(15,23,42,.12);
    max-height: 200px;
    overflow-y: auto;
}

.td-invite-select__option {
    border: none;
    background: transparent;
    color: var(--text);
    text-align: left;
    padding: .5rem .65rem;
    border-radius: 10px;
    cursor: pointer;
    font: inherit;
    transition: background .15s, color .15s;
}

.td-invite-select__option:hover {
    background: rgba(59,130,246,.07);
    color: var(--accent-strong);
}

.td-invite-select__empty {
    padding: .55rem .65rem;
    color: var(--muted);
    font-size: .8rem;
}

/* form-control generic */
.form-control {
    width: 100%;
    padding: .8rem 1rem;
    border-radius: 12px;
    border: 1px solid rgba(145,158,171,.24);
    background: #fff;
    color: var(--text);
    font: inherit;
    transition: border-color .2s, box-shadow .2s;
}

.form-control:focus {
    outline: none;
    border-color: rgba(59,130,246,.6);
    box-shadow: 0 0 0 4px rgba(59,130,246,.1);
}

/* ────────────────────────────────────────────
   Lesson Detail (ld-*) styles
──────────────────────────────────────────── */

/* Hero */
.ld-hero {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.ld-hero__main {
    display: flex;
    flex-direction: column;
    gap: .5rem;
}

.ld-hero__title {
    margin: 0;
    font-size: clamp(1.6rem, 2.4vw, 2.4rem);
    letter-spacing: -.02em;
    line-height: 1.1;
}

.ld-hero__sub {
    color: var(--muted);
    font-size: .95rem;
    margin: 0;
}

/* Status badge */
.ld-badge {
    display: inline-flex;
    align-items: center;
    padding: .3rem .85rem;
    border-radius: 999px;
    font-size: .78rem;
    font-weight: 700;
    letter-spacing: .04em;
    text-transform: uppercase;
    align-self: flex-start;
}

.ld-badge--scheduled {
    background: rgba(59,130,246,.12);
    color: var(--accent-strong);
}

.ld-badge--conducted {
    background: rgba(22,163,74,.12);
    color: var(--success);
}

.ld-badge--canceled {
    background: rgba(239,68,68,.12);
    color: var(--danger);
}

/* Info bar */
.ld-infobar {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 1px;
    background: var(--border);
    border-radius: 18px;
    overflow: hidden;
    border: 1px solid var(--border);
    margin-bottom: 1.5rem;
}

.ld-info-item {
    background: var(--surface-strong);
    padding: 1.1rem 1.25rem;
    display: flex;
    flex-direction: column;
    gap: .2rem;
}

.ld-info-label {
    font-size: .72rem;
    font-weight: 700;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: .06em;
}

.ld-info-value {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text);
    line-height: 1.2;
}

.ld-info-sub {
    font-size: .82rem;
    color: var(--muted);
}

.ld-info-value--yes { color: var(--success); }
.ld-info-value--no  { color: var(--muted); }

/* Status segmented control */
.ld-status-bar {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    background: var(--surface-strong);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: .85rem 1.25rem;
    margin-bottom: 1.5rem;
}

.ld-status-bar__label {
    font-size: .88rem;
    font-weight: 700;
    color: var(--muted);
    white-space: nowrap;
}

.ld-seg-control {
    display: flex;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 999px;
    overflow: hidden;
    gap: 0;
}

.ld-seg-btn {
    background: transparent;
    border: none;
    padding: .5rem 1.1rem;
    font-size: .82rem;
    font-weight: 600;
    cursor: pointer;
    color: var(--muted);
    transition: background .15s, color .15s;
    white-space: nowrap;
}

.ld-seg-btn:hover {
    color: var(--text);
    background: var(--surface-strong);
}

.ld-seg-btn--scheduled {
    background: rgba(59,130,246,.12);
    color: var(--accent-strong);
}

.ld-seg-btn--conducted {
    background: rgba(22,163,74,.12);
    color: var(--success);
}

.ld-seg-btn--canceled {
    background: rgba(239,68,68,.12);
    color: var(--danger);
}

/* Body: 2-col for tutor */
.ld-body {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
    align-items: start;
}

/* ═══════ Lesson Detail — new layout ═══════ */
.ld-hero { padding: 1.5rem 0 1rem; }
.ld-back-link { color: var(--primary); text-decoration: none; font-size:.9rem; }
.ld-back-link:hover { text-decoration: underline; }
.ld-hero-inner { margin-top: .75rem; }
.ld-hero-title-row { display: flex; align-items: center; gap: .75rem; }
.ld-title { font-size: 1.7rem; font-weight: 700; margin: 0; }
.ld-badge--group { background: var(--primary); color: #fff; padding: .25rem .7rem; border-radius: 999px; font-size: .78rem; font-weight: 600; }
.ld-infobar { display: flex; flex-wrap: wrap; gap: .5rem 1.5rem; margin-top: .6rem; font-size: .88rem; color: var(--muted); }
.ld-info-item--hw { color: var(--primary); font-weight: 600; }
.ld-messages { margin: 1rem 0; }

/* 2-col layout */
.ld-layout { display: grid; grid-template-columns: 1fr 320px; gap: 1.5rem; align-items: start; margin-top: 1.5rem; }
.ld-main { min-width: 0; }

/* Cards */
.ld-card { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 1.25rem; }
.ld-card-header { font-weight: 700; font-size: 1rem; margin-bottom: 1rem; color: var(--text); }
.ld-save-btn { margin-top: .75rem; }
.ld-textarea { width: 100%; border: 1px solid var(--border); border-radius: 8px; padding: .6rem .8rem; font-size: .9rem; resize: vertical; background: var(--bg); color: var(--text); font-family: inherit; }
.ld-textarea:focus { outline: none; border-color: var(--primary); }

/* Students table */
.ld-students-table { margin-top: 1.25rem; border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
.ld-students-header { display: grid; grid-template-columns: 180px 140px 1fr 1fr; gap: .5rem; padding: .6rem 1rem; background: var(--bg); font-size: .8rem; font-weight: 600; color: var(--muted); border-bottom: 1px solid var(--border); }
.ld-student-row { display: grid; grid-template-columns: 180px 140px 1fr 1fr; gap: .5rem; padding: .75rem 1rem; border-bottom: 1px solid var(--border); align-items: start; }
.ld-student-row:last-child { border-bottom: none; }
.ld-student-name { font-weight: 600; font-size: .88rem; }
.ld-public-note-hint { cursor: help; margin-left: .3rem; }
.ld-status-select { width: 100%; border: 1px solid var(--border); border-radius: 6px; padding: .35rem .5rem; font-size: .84rem; background: var(--bg); color: var(--text); }
.ld-status-select--conducted { border-color: var(--success); color: var(--success); }
.ld-status-select--canceled  { border-color: var(--danger);  color: var(--danger);  }
.ld-note-input { width: 100%; border: 1px solid var(--border); border-radius: 6px; padding: .4rem .6rem; font-size: .82rem; resize: vertical; background: var(--bg); color: var(--text); font-family: inherit; }

/* HW student blocks */
.ld-hw-student-block { padding: .75rem 0; }
.ld-hw-student-name { font-weight: 700; margin-bottom: .5rem; }
.ld-hw-status-row { display: flex; align-items: center; flex-wrap: wrap; gap: .5rem; margin-bottom: .5rem; }
.ld-hw-badge { padding: .25rem .75rem; border-radius: 999px; font-size: .78rem; font-weight: 600; }
.ld-hw-badge--pending       { background: rgba(59,130,246,.12); color: #3b82f6; }
.ld-hw-badge--under_review  { background: rgba(234,179,8,.12);  color: #b45309; }
.ld-hw-badge--accepted      { background: rgba(22,163,74,.12);  color: var(--success); }
.ld-hw-badge--rejected      { background: rgba(239,68,68,.12);  color: var(--danger); }
.ld-hw-badge--none          { background: var(--bg);            color: var(--muted); }
.ld-hw-badge--scheduled     { background: rgba(100,116,139,.1); color: var(--muted); }
.ld-hw-badge--conducted     { background: rgba(22,163,74,.12);  color: var(--success); }
.ld-hw-badge--canceled      { background: rgba(239,68,68,.12);  color: var(--danger); }
.ld-hw-divider { border: none; border-top: 1px solid var(--border); margin: .5rem 0; }
.ld-hw-files { display: flex; flex-wrap: wrap; gap: .4rem .75rem; align-items: center; font-size: .82rem; }
.ld-hw-files-label { color: var(--muted); font-weight: 600; }
.ld-file-link { color: var(--primary); text-decoration: none; font-size: .85rem; }
.ld-file-link:hover { text-decoration: underline; }

/* Upload forms */
.ld-upload-form { display: flex; align-items: center; flex-wrap: wrap; gap: .5rem; margin-top: .5rem; }
.ld-upload-label { display: flex; align-items: center; gap: .4rem; font-size: .84rem; cursor: pointer; }
.ld-file-input { font-size: .82rem; }

/* Materials list */
.ld-materials-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: .35rem; }

/* Student view */
.ld-public-note { margin-top: 1rem; background: var(--bg); border-left: 3px solid var(--primary); padding: .6rem .9rem; border-radius: 0 8px 8px 0; font-size: .9rem; }
.ld-public-note-title { font-weight: 600; font-size: .8rem; color: var(--muted); margin-bottom: .3rem; }
.ld-hw-desc { font-size: .92rem; line-height: 1.6; }

/* Notifications — tutor main */
.td-notifications { display: flex; flex-wrap: wrap; gap: 1rem; margin: 1.25rem 0; }
.td-notif { display: flex; gap: .75rem; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 1rem 1.25rem; flex: 1 1 280px; }
.td-notif--lessons { border-left: 3px solid var(--primary); }
.td-notif--hw      { border-left: 3px solid #b45309; }
.td-notif-icon {
    width: 2rem;
    height: 2rem;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.td-notif--lessons .td-notif-icon { background: rgba(59,130,246,.1); color: var(--accent-strong); }
.td-notif--hw .td-notif-icon { background: rgba(180,83,9,.1); color: #92400e; }
.td-notif-icon svg { width: 17px; height: 17px; }
.td-notif-body { min-width: 0; }
.td-notif-title { font-weight: 700; font-size: .92rem; margin-bottom: .4rem; }
.td-notif-items { display: flex; flex-direction: column; gap: .4rem; }
.td-notif-item { display: flex; flex-direction: row; align-items: center; justify-content: space-between; gap: .5rem; text-decoration: none; color: var(--text); font-size: .85rem; padding: .5rem .75rem; border-radius: 8px; background: var(--bg); border: 1px solid var(--border); transition: border-color .15s, background .15s; }
.td-notif-item:hover { border-color: var(--primary); background: var(--surface); }
.td-notif-item-body { display: flex; flex-direction: column; min-width: 0; }
.td-notif-item-chevron { width: 14px; height: 14px; flex-shrink: 0; color: var(--muted); }
.td-notif-sub { font-size: .76rem; color: var(--muted); }
.td-notif--warn { border-left: 3px solid #d97706; }
.td-notif--warn .td-notif-icon { background: rgba(217,119,6,.1); color: #b45309; }

/* Group lesson in project_detail inline form */
.pd-group-hint {
    margin: .6rem 0 .25rem;
    font-size: .85rem;
    color: var(--success);
    font-weight: 500;
}
.pd-group-counter {
    font-weight: 700;
    margin-left: .5rem;
}

/* Group-check icon on card (hidden normally, shown in group mode) */
.pd-group-check-icon {
    display: none;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border);
    border-radius: 50%;
    font-size: .7rem;
    line-height: 18px;
    text-align: center;
    margin-left: .5rem;
    flex-shrink: 0;
    color: transparent;
    transition: background .15s, border-color .15s, color .15s;
}

/* In group mode: show checkboxes on all cards */
.pd-group-mode .student-card {
    cursor: crosshair;
}
.pd-group-mode .pd-group-check-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.pd-group-mode .student-card--active {
    /* don't keep active in group mode */
    outline: none;
}
/* selected state — green for positive selection */
.pd-group-mode .student-card.pd-group-selected {
    border-color: var(--success);
    background: rgba(22,163,74,.06);
}
.pd-group-mode .student-card.pd-group-selected .pd-group-check-icon {
    background: var(--success);
    border-color: var(--success);
    color: #fff;
}

/* student-card name row flex */
.student-card__name {
    display: flex;
    align-items: center;
}

/* Group badge on lesson stickers */
.ls-group-badge {
    position: absolute;
    top: .35rem;
    right: .35rem;
    background: var(--primary);
    color: #fff;
    font-size: .6rem;
    font-weight: 700;
    padding: .1rem .4rem;
    border-radius: 999px;
    letter-spacing: .03em;
    pointer-events: none;
}

@media (max-width: 768px) {
    .ld-layout { grid-template-columns: 1fr; }
    .ld-students-header, .ld-student-row { grid-template-columns: 1fr 1fr; }
}


@media (max-width: 760px) {
    .ld-body { grid-template-columns: 1fr; }
}

/* Cards */
.ld-card {
    background: var(--surface-strong);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 1.5rem;
}

.ld-card--highlight {
    border-color: rgba(59,130,246,.3);
    background: linear-gradient(135deg, rgba(59,130,246,.06), var(--surface-strong));
}

.ld-card-title {
    margin: 0 0 1.1rem;
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    padding-bottom: .75rem;
    border-bottom: 1px solid var(--border);
}

/* Student list in assignment card */
.ld-student-list {
    display: flex;
    flex-direction: column;
    gap: .75rem;
    margin-bottom: 1.25rem;
}

.ld-student-row {
    display: flex;
    align-items: center;
    gap: .85rem;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: .75rem 1rem;
}

.ld-student-avatar {
    width: 40px;
    height: 40px;
    border-radius: 11px;
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: .85rem;
    flex-shrink: 0;
    letter-spacing: -.03em;
}

.ld-student-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: .15rem;
}

.ld-student-name {
    font-weight: 700;
    font-size: .9rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.ld-student-email {
    font-size: .78rem;
    color: var(--muted);
}

/* Homework chip */
.ld-hw-chip {
    display: inline-flex;
    align-items: center;
    padding: .18rem .55rem;
    border-radius: 999px;
    font-size: .73rem;
    font-weight: 700;
    margin-top: .2rem;
    align-self: flex-start;
}

.ld-hw-none,
.ld-hw-pending {
    background: rgba(99,115,129,.12);
    color: var(--muted);
}

.ld-hw-under_review {
    background: rgba(234,179,8,.15);
    color: #92400e;
}

.ld-hw-accepted {
    background: rgba(22,163,74,.12);
    color: var(--success);
}

.ld-hw-rejected {
    background: rgba(239,68,68,.1);
    color: var(--danger);
}

/* HW row (student view) */
.ld-hw-row {
    display: flex;
    align-items: center;
    gap: .75rem;
    margin-top: .5rem;
}

.ld-hw-label {
    font-size: .88rem;
    font-weight: 600;
    color: var(--muted);
}

/* Unassign button */
.ld-unassign-btn {
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 8px;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: .75rem;
    color: var(--muted);
    flex-shrink: 0;
    transition: background .15s, color .15s, border-color .15s;
}

.ld-unassign-btn:hover {
    background: rgba(239,68,68,.1);
    border-color: var(--danger);
    color: var(--danger);
}

/* Assign form */
.ld-assign-form {
    border-top: 1px solid var(--border);
    padding-top: 1rem;
    margin-top: .25rem;
}

.ld-assign-label {
    font-size: .82rem;
    font-weight: 700;
    color: var(--muted);
    margin: 0 0 .6rem;
    text-transform: uppercase;
    letter-spacing: .05em;
}

.ld-assign-row {
    display: flex;
    gap: .6rem;
    align-items: stretch;
}

.ld-assign-row .form-control {
    flex: 1;
}

/* Materials */
.ld-materials-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: .5rem;
}

.ld-material-item {
    display: flex;
    align-items: center;
    gap: .65rem;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: .7rem 1rem;
    transition: border-color .15s;
}

.ld-material-item:hover {
    border-color: var(--accent);
}

.ld-material-icon {
    font-size: 1rem;
    flex-shrink: 0;
}

.ld-material-link {
    font-size: .88rem;
    font-weight: 600;
    color: var(--accent-strong);
    word-break: break-all;
}

.ld-material-link:hover {
    text-decoration: underline;
}

/* Student view container */
.ld-student-view {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    max-width: 600px;
}

/* ═══════════════════════════════════════════════════════════════
   Lesson Detail v2  (ld2-*)
═══════════════════════════════════════════════════════════════ */

/* Hero */
.ld2-hero {
    padding: 1.75rem 0 1.5rem;
    border-bottom: 1px solid var(--border);
    margin-bottom: 1.75rem;
}
.ld2-back {
    display: inline-flex;
    align-items: center;
    gap: .35rem;
    color: var(--muted);
    text-decoration: none;
    font-size: .85rem;
    font-weight: 500;
    padding: .3rem .55rem;
    border-radius: 7px;
    transition: color .15s, background .15s;
    margin-bottom: 1rem;
}
.ld2-back:hover { color: var(--primary); background: rgba(99,102,241,.07); text-decoration: none; }
.ld2-title-row { display: flex; align-items: center; gap: .75rem; flex-wrap: wrap; }
.ld2-title { font-size: 1.9rem; font-weight: 800; margin: 0; letter-spacing: -.025em; }
.ld2-badge {
    display: inline-flex;
    align-items: center;
    gap: .3rem;
    padding: .3rem .85rem;
    border-radius: 999px;
    font-size: .78rem;
    font-weight: 700;
}
.ld2-badge--group {
    background: rgba(99,102,241,.1);
    color: var(--primary);
    border: 1.5px solid rgba(99,102,241,.22);
}
.ld2-pills {
    display: flex;
    flex-wrap: wrap;
    gap: .4rem;
    margin-top: .85rem;
}
.ld2-pill {
    display: inline-flex;
    align-items: center;
    gap: .3rem;
    padding: .3rem .8rem;
    border-radius: 999px;
    font-size: .82rem;
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--muted);
}
.ld2-pill--hw {
    background: rgba(99,102,241,.08);
    border-color: rgba(99,102,241,.22);
    color: var(--primary);
    font-weight: 600;
}

/* Layout */
.ld2-layout { display: grid; grid-template-columns: 1fr 272px; gap: 1.5rem; align-items: start; }
.ld2-main { min-width: 0; display: flex; flex-direction: column; gap: 1.25rem; }

/* Sections */
.ld2-section {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 1.5rem;
    box-shadow: 0 1px 4px rgba(15,23,42,.04);
}
.ld2-section-head {
    display: flex;
    align-items: center;
    gap: .55rem;
    margin-bottom: 1.25rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}
.ld2-section-icon { font-size: 1.05rem; line-height: 1; }
.ld2-section-title { font-size: .97rem; font-weight: 700; margin: 0; color: var(--text); }
.ld2-section-count {
    margin-left: auto;
    background: var(--bg);
    border: 1px solid var(--border);
    color: var(--muted);
    font-size: .74rem;
    font-weight: 700;
    padding: .1rem .5rem;
    border-radius: 999px;
}

/* Avatar */
.ld2-avatar {
    width: 38px; height: 38px;
    border-radius: 50%;
    background: var(--_av-bg, var(--primary));
    color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: .82rem;
    flex-shrink: 0;
    letter-spacing: -.02em;
}
.ld2-avatar--sm { width: 28px; height: 28px; font-size: .72rem; }

/* td-slot-avatar: same circle style as ld2-avatar */
.td-slot-avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--_av-bg, var(--accent));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: .82rem;
    flex-shrink: 0;
    letter-spacing: -.02em;
}

/* Student card within lesson detail */
.ld2-student-list { display: flex; flex-direction: column; gap: .75rem; }
.ld2-student-card {
    border: 1px solid var(--border);
    border-radius: 14px;
    overflow: hidden;
    transition: box-shadow .18s;
}
.ld2-student-card:hover { box-shadow: 0 2px 12px rgba(15,23,42,.07); }
.ld2-student-top {
    display: flex;
    align-items: center;
    gap: .85rem;
    padding: .85rem 1rem;
    background: var(--bg);
}
.ld2-student-info { flex: 1; min-width: 0; }
.ld2-student-name { font-weight: 600; font-size: .9rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ld2-student-email { font-size: .77rem; color: var(--muted); }
.ld2-student-notes {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: .75rem;
    padding: .85rem 1rem;
}

/* Status select pill */
.ld2-status-select {
    border-radius: 999px;
    padding: .3rem .8rem;
    font-size: .8rem;
    font-weight: 600;
    cursor: pointer;
    border: 1.5px solid var(--border);
    background: var(--surface);
    color: var(--muted);
    white-space: nowrap;
    flex-shrink: 0;
    transition: border-color .15s, color .15s, background .15s;
}
.ld2-status-select:focus { outline: none; }
.ld2-status--scheduled { border-color: var(--border); color: var(--muted); background: var(--surface); }
.ld2-status--conducted { border-color: var(--success); color: var(--success); background: rgba(22,163,74,.06); }
.ld2-status--canceled  { border-color: var(--danger);  color: var(--danger);  background: rgba(239,68,68,.06); }

/* Note fields */
.ld2-note-label {
    display: block;
    font-size: .73rem;
    font-weight: 700;
    color: var(--muted);
    margin-bottom: .3rem;
    text-transform: uppercase;
    letter-spacing: .05em;
}

/* Textarea */
.ld2-textarea {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 9px;
    padding: .55rem .75rem;
    font-size: .87rem;
    resize: vertical;
    background: var(--bg);
    color: var(--text);
    font-family: inherit;
    transition: border-color .15s, box-shadow .15s;
    box-sizing: border-box;
    line-height: 1.5;
}
.ld2-textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(99,102,241,.1); }
.ld2-textarea--lg { font-size: .9rem; }

/* HW description block */
.ld2-hw-desc-block {
    margin-top: 1.25rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--border);
}
.ld2-hw-desc-label {
    display: block;
    font-size: .85rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: .5rem;
}

/* Form footer */
.ld2-form-foot { margin-top: 1rem; display: flex; justify-content: flex-end; }
.ld2-save-btn { font-weight: 600; }

/* HW list */
.ld2-hw-list { display: flex; flex-direction: column; }
.ld2-hw-item { padding: 1rem 0; }
.ld2-hw-item--bordered { border-bottom: 1px solid var(--border); }
.ld2-hw-item-head { display: flex; align-items: center; gap: .65rem; margin-bottom: .65rem; }
.ld2-hw-student-name { flex: 1; font-weight: 600; font-size: .9rem; }
.ld2-hw-actions { display: flex; gap: .5rem; margin-bottom: .65rem; }

/* Status/HW pills */
.ld2-hw-pill {
    display: inline-flex;
    align-items: center;
    padding: .2rem .7rem;
    border-radius: 999px;
    font-size: .77rem;
    font-weight: 700;
    white-space: nowrap;
}
.ld2-hw-pill--lg { font-size: .9rem; padding: .35rem 1.1rem; }
.ld2-hw-pill--pending       { background: rgba(59,130,246,.1);  color: #2563eb; }
.ld2-hw-pill--under_review  { background: rgba(234,179,8,.14);  color: #92400e; }
.ld2-hw-pill--accepted      { background: rgba(22,163,74,.11);  color: var(--success); }
.ld2-hw-pill--rejected      { background: rgba(239,68,68,.11);  color: var(--danger); }
.ld2-hw-pill--none          { background: var(--bg); color: var(--muted); border: 1px solid var(--border); }
.ld2-hw-pill--scheduled     { background: var(--bg); color: var(--muted); border: 1px solid var(--border); }
.ld2-hw-pill--conducted     { background: rgba(22,163,74,.11);  color: var(--success); }
.ld2-hw-pill--canceled      { background: rgba(239,68,68,.11);  color: var(--danger); }

/* File chips */
.ld2-file-row { display: flex; flex-wrap: wrap; align-items: center; gap: .35rem .5rem; }
.ld2-file-row-label { font-size: .76rem; color: var(--muted); font-weight: 600; }
.ld2-file-chip {
    display: inline-flex; align-items: center; gap: .25rem;
    padding: .2rem .65rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 999px;
    font-size: .79rem;
    color: var(--primary);
    text-decoration: none;
    transition: background .14s, border-color .14s;
}
.ld2-file-chip:hover { background: rgba(99,102,241,.08); border-color: rgba(99,102,241,.3); text-decoration: none; }
.ld2-file-chip--block { border-radius: 10px; display: flex; padding: .4rem .75rem; }

/* Upload zone */
.ld2-upload-zone { display: flex; align-items: center; flex-wrap: wrap; gap: .5rem; margin-top: .6rem; }

/* Messages */
.ld2-messages { margin: .5rem 0 1.25rem; }
.ld2-empty { color: var(--muted); font-size: .88rem; margin: 0; }

/* Sidebar */
.ld2-aside-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 1.25rem;
    box-shadow: 0 1px 4px rgba(15,23,42,.04);
    position: sticky;
    top: 80px;
}
.ld2-aside-head { font-weight: 700; font-size: .92rem; margin-bottom: 1rem; color: var(--text); }
.ld2-materials { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: .4rem; }

/* Student view */
.ld2-status-hero { display: flex; align-items: center; gap: 1rem; padding: .25rem 0 .75rem; }
.ld2-status-label { font-size: .82rem; font-weight: 600; color: var(--muted); }
.ld2-tutor-comment {
    background: var(--bg);
    border-left: 3px solid var(--primary);
    border-radius: 0 10px 10px 0;
    padding: .75rem 1rem;
    font-size: .9rem;
    margin-top: .5rem;
    line-height: 1.55;
}
.ld2-tutor-comment-label {
    font-weight: 700;
    font-size: .73rem;
    color: var(--muted);
    margin-bottom: .3rem;
    text-transform: uppercase;
    letter-spacing: .05em;
}
.ld2-hw-description { font-size: .92rem; line-height: 1.65; }

/* Responsive */
@media (max-width: 740px) {
    .ld2-layout { grid-template-columns: 1fr; }
    .ld2-student-notes { grid-template-columns: 1fr; }
    .ld2-title { font-size: 1.5rem; }
    .ld2-sidebar { order: -1; }
    .ld2-aside-card { position: static; }
}

/* ═══════════════════════════════════════════════════════════════
   Lesson Detail v3  (ld3-*)  — new 2-col layout
═══════════════════════════════════════════════════════════════ */

/* Outer 2-col grid: info pane LEFT | action pane RIGHT */
.ld3-layout {
    display: grid;
    grid-template-columns: 340px 1fr;
    gap: 1.5rem;
    align-items: start;
}

/* ── Left column ── */
.ld3-left { display: flex; flex-direction: column; gap: 1rem; }

/* Info card */
.ld3-info-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 1.5rem;
    box-shadow: 0 1px 4px rgba(15,23,42,.04);
}
.ld3-info-heading {
    font-size: .72rem;
    font-weight: 700;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: .06em;
    margin: 0 0 .9rem;
}
.ld3-info-row {
    display: flex;
    align-items: flex-start;
    gap: .55rem;
    font-size: .88rem;
    color: var(--text);
    margin-bottom: .55rem;
}
.ld3-info-row:last-child { margin-bottom: 0; }
.ld3-info-icon { font-size: .95rem; flex-shrink: 0; line-height: 1.35; }
.ld3-info-label { font-weight: 600; min-width: 70px; flex-shrink: 0; color: var(--muted); font-size: .78rem; }
.ld3-info-val { flex: 1; }
.ld3-divider { border: none; border-top: 1px solid var(--border); margin: 1rem 0; }

/* Student card within left panel */
.ld3-student-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 1.25rem 1.35rem;
    box-shadow: 0 1px 4px rgba(15,23,42,.04);
}
.ld3-student-header {
    display: flex;
    align-items: center;
    gap: .75rem;
    margin-bottom: 1rem;
}
.ld3-student-meta { flex: 1; min-width: 0; }
.ld3-student-name { font-weight: 700; font-size: .95rem; }
.ld3-student-email { font-size: .78rem; color: var(--muted); margin-top: .1rem; }

/* Status select (pill style) */
.ld3-status-select {
    width: 100%;
    border-radius: 10px;
    padding: .45rem .7rem;
    font-size: .85rem;
    font-weight: 600;
    cursor: pointer;
    border: 1.5px solid var(--border);
    background: var(--bg);
    color: var(--muted);
    transition: border-color .15s, color .15s, background .15s;
    margin-bottom: .85rem;
}
.ld3-status-select:focus { outline: none; }
.ld3-status--scheduled { border-color: var(--border); color: var(--muted); background: var(--bg); }
.ld3-status--conducted { border-color: var(--success); color: var(--success); background: rgba(22,163,74,.06); }
.ld3-status--canceled  { border-color: var(--danger);  color: var(--danger);  background: rgba(239,68,68,.06); }

/* Private note inside left card */
.ld3-private-note-label {
    display: block;
    font-size: .72rem;
    font-weight: 700;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: .05em;
    margin-bottom: .3rem;
}

/* ── Right column ── */
.ld3-right { display: flex; flex-direction: column; gap: 1rem; }

.ld3-section {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 1.35rem 1.5rem;
    box-shadow: 0 1px 4px rgba(15,23,42,.04);
}
.ld3-section-head {
    display: flex;
    align-items: center;
    gap: .5rem;
    margin-bottom: 1.1rem;
    padding-bottom: .85rem;
    border-bottom: 1px solid var(--border);
}
.ld3-section-icon { font-size: 1rem; line-height: 1; }
.ld3-section-title { font-size: .95rem; font-weight: 700; margin: 0; }
.ld3-section-badge {
    margin-left: auto;
    background: var(--bg);
    border: 1px solid var(--border);
    color: var(--muted);
    font-size: .72rem;
    font-weight: 700;
    padding: .1rem .5rem;
    border-radius: 999px;
}

/* Textarea */
.ld3-textarea {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 9px;
    padding: .55rem .75rem;
    font-size: .87rem;
    resize: vertical;
    background: var(--bg);
    color: var(--text);
    font-family: inherit;
    box-sizing: border-box;
    line-height: 1.5;
    transition: border-color .15s, box-shadow .15s;
}
.ld3-textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(99,102,241,.1); }

/* Save row */
.ld3-form-foot { display: flex; justify-content: flex-end; margin-top: .85rem; }

/* File chips */
.ld3-file-row { display: flex; flex-wrap: wrap; align-items: center; gap: .3rem .45rem; }
.ld3-file-row-label { font-size: .76rem; color: var(--muted); font-weight: 600; }
.ld3-file-chip {
    display: inline-flex; align-items: center; gap: .2rem;
    padding: .2rem .65rem;
    background: var(--bg); border: 1px solid var(--border);
    border-radius: 999px; font-size: .79rem;
    color: var(--primary); text-decoration: none;
    transition: background .14s, border-color .14s;
}
.ld3-file-chip:hover { background: rgba(99,102,241,.08); border-color: rgba(99,102,241,.3); text-decoration: none; }

/* HW Pills */
.ld3-hw-pill {
    font-weight: 700;
    white-space: nowrap;
}
.ld3-hw-pill--pending       { background: rgba(59,130,246,.1);  color: #2563eb; }
.ld3-hw-pill--under_review  { background: rgba(234,179,8,.14);  color: #92400e; }
.ld3-hw-pill--accepted      { background: rgba(22,163,74,.11);  color: var(--success); }
.ld3-hw-pill--rejected      { background: rgba(239,68,68,.11);  color: var(--danger); }
.ld3-hw-pill--none          { background: var(--bg); color: var(--muted); border: 1px solid var(--border); }
.ld3-hw-pill--scheduled     { background: var(--bg); color: var(--muted); border: 1px solid var(--border); }
.ld3-hw-pill--conducted     { background: rgba(22,163,74,.11);  color: var(--success); }
.ld3-hw-pill--canceled      { background: rgba(239,68,68,.11);  color: var(--danger); }

/* Upload zone */
.ld3-upload-zone {
    display: flex; align-items: center; flex-wrap: wrap; gap: .5rem;
    margin-top: .65rem;
    padding: .6rem .75rem;
    border: 1.5px dashed var(--border);
    border-radius: 10px;
    background: var(--bg);
}

/* ── Comment thread ── */
.ld3-thread { display: flex; flex-direction: column; gap: .65rem; margin-bottom: .9rem; }
.ld3-msg {
    display: flex;
    gap: .6rem;
    align-items: flex-start;
}
.ld3-msg--self { flex-direction: row-reverse; }
.ld3-msg-avatar {
    width: 30px; height: 30px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: .78rem; flex-shrink: 0;
    background: var(--_av-bg, var(--primary)); color: #fff;
}
.ld3-msg-avatar--tutor  { --_av-bg: var(--primary); }
.ld3-msg-avatar--student { --_av-bg: var(--success); }
.ld3-msg-body { max-width: calc(100% - 42px); }
.ld3-msg-bubble {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 0 12px 12px 12px;
    padding: .55rem .8rem;
    font-size: .87rem;
    line-height: 1.5;
    word-break: break-word;
}
.ld3-msg--self .ld3-msg-bubble {
    background: rgba(99,102,241,.08);
    border-color: rgba(99,102,241,.2);
    border-radius: 12px 0 12px 12px;
}
.ld3-msg-meta {
    font-size: .72rem; color: var(--muted);
    margin-top: .25rem;
    padding: 0 .25rem;
}
.ld3-msg--self .ld3-msg-meta { text-align: right; }
.ld3-thread-empty { color: var(--muted); font-size: .86rem; padding: .5rem 0; }

/* Comment input */
.ld3-comment-form { display: flex; gap: .5rem; align-items: flex-start; }
.ld3-comment-input {
    flex: 1;
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: .5rem .75rem;
    font-size: .87rem;
    font-family: inherit;
    resize: none;
    background: var(--bg);
    color: var(--text);
    line-height: 1.45;
    transition: border-color .15s, box-shadow .15s;
    min-height: 44px;
}
.ld3-comment-input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(99,102,241,.1); }

/* HW actions */
.ld3-hw-actions { display: flex; gap: .5rem; margin: .6rem 0; }

/* Accordion (multiple students in right col) */
.ld3-accordion { border: 1px solid var(--border); border-radius: 14px; overflow: hidden; }
.ld3-accordion-item { border-top: 1px solid var(--border); }
.ld3-accordion-item:first-child { border-top: none; }
.ld3-accordion-trigger {
    width: 100%; text-align: left; display: flex; align-items: center;
    gap: .65rem; padding: .85rem 1rem; background: var(--bg);
    border: none; cursor: pointer; font-weight: 600; font-size: .88rem;
    color: var(--text); font-family: inherit;
    transition: background .15s;
}
.ld3-accordion-trigger:hover { background: #efeef9; }
.ld3-accordion-trigger[aria-expanded="true"] { background: rgba(99,102,241,.07); }
.ld3-accordion-arrow { margin-left: auto; transition: transform .2s; font-size: .75rem; }
.ld3-accordion-trigger[aria-expanded="true"] .ld3-accordion-arrow { transform: rotate(180deg); }
.ld3-accordion-body { padding: 1rem; display: none; }
.ld3-accordion-body.open { display: block; }

/* Student view — status hero */
.ld3-status-hero {
    display: flex; align-items: center; gap: 1rem;
    padding: .25rem 0 .65rem;
}
.ld3-status-label { font-size: .82rem; font-weight: 600; color: var(--muted); }

/* Tutor comment block (student view) */
.ld3-tutor-comment {
    background: var(--bg);
    border-left: 3px solid var(--primary);
    border-radius: 0 10px 10px 0;
    padding: .7rem 1rem;
    font-size: .9rem; margin-top: .5rem; line-height: 1.55;
}
.ld3-tutor-comment-label {
    font-weight: 700; font-size: .72rem; color: var(--muted);
    margin-bottom: .3rem; text-transform: uppercase; letter-spacing: .05em;
}

/* HW description */
.ld3-hw-desc { font-size: .92rem; line-height: 1.65; }

/* Misc */
.ld3-empty { color: var(--muted); font-size: .86rem; margin: 0; }
.ld3-note-sub { font-size: .73rem; color: var(--muted); margin-bottom: .3rem; font-weight: 600; text-transform: uppercase; letter-spacing:.05em; display:block; }

@media (max-width: 860px) {
    .ld3-layout { grid-template-columns: 1fr; }
    .ld3-left { flex-direction: row; flex-wrap: wrap; }
    .ld3-left > * { flex: 1 1 260px; }
}
@media (max-width: 560px) {
    .ld3-left { flex-direction: column; }
}

@media (max-width: 700px) {
    .td-hero {
        grid-template-columns: 1fr;
        padding: 1.25rem 1.1rem;
    }
    .td-stats {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
    .site-header__inner {
        padding: .75rem .9rem;
        flex-direction: column;
        align-items: stretch;
    }
    .site-nav {
        width: 100%;
        justify-content: space-between;
        gap: .45rem;
    }
    .site-nav a,
    .link-button {
        padding: .58rem .75rem;
    }
    .user-badge {
        max-width: 62vw;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
    .user-badge--button {
        min-width: 0;
        width: 100%;
    }
    .user-badge__name {
        max-width: 100%;
    }
    .account-menu {
        width: 100%;
    }
    .account-panel {
        position: fixed;
        right: .6rem;
        left: .6rem;
        top: 4.25rem;
        width: auto;
    }
    .account-grid {
        grid-template-columns: 1fr;
    }
    .account-pass-grid {
        grid-template-columns: 1fr;
    }
    .account-avatar-row {
        align-items: flex-start;
        flex-direction: column;
    }
    .so-hero {
        flex-direction: column;
    }
    .so-kpi-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .page-main {
        padding: 1rem .6rem 2rem;
    }
    .container {
        padding: 1.1rem;
        border-radius: 14px;
    }
    .td-section {
        padding: 1rem;
    }
    .td-cal-month-label {
        min-width: 0;
        font-size: .86rem;
    }
}

@media (max-width: 540px) {
    .so-kpi-grid {
        grid-template-columns: 1fr;
    }
    .td-stats {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .td-slots-grid {
        grid-template-columns: 1fr;
    }
    .td-slot-actions {
        grid-template-columns: 1fr 1fr;
    }
    .td-slot-actions form {
        grid-column: 1 / -1;
    }
    .ld3-lesson-meta-actions {
        flex-direction: column;
    }
    .ld3-lesson-meta-actions .btn {
        width: 100%;
    }
}

@media (max-width: 390px) {
    .td-stats {
        grid-template-columns: 1fr;
    }
}

/* ── Back button ── */
.ld3-back {
    display: inline-flex;
    align-items: center;
    gap: .45rem;
    color: var(--muted);
    text-decoration: none;
    font-size: .82rem;
    font-weight: 600;
    padding: .35rem .75rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--surface);
    transition: color .15s, border-color .15s, box-shadow .15s;
    margin-bottom: 1.25rem;
    line-height: 1;
}
.ld3-back:hover {
    color: var(--primary);
    border-color: var(--primary);
    box-shadow: 0 2px 8px rgba(99,102,241,.1);
    text-decoration: none;
}
.ld3-back-arrow { font-size: 1rem; }

/* ── Status radio buttons ── */
.ld3-status-group {
    display: flex;
    gap: .4rem;
    margin-bottom: .9rem;
    flex-wrap: wrap;
}
.ld3-status-group input[type="radio"] { display: none; }
.ld3-status-group label {
    display: inline-flex;
    align-items: center;
    gap: .3rem;
    padding: .35rem .85rem;
    border-radius: 999px;
    font-size: .8rem;
    font-weight: 600;
    cursor: pointer;
    border: 1.5px solid var(--border);
    color: var(--muted);
    background: var(--bg);
    transition: border-color .15s, color .15s, background .15s, box-shadow .12s;
    user-select: none;
}
.ld3-status-group label:hover { background: var(--surface); }
/* Checked states */
.ld3-status-group input[value="SCHEDULED"]:checked + label {
    border-color: #94a3b8; color: #475569; background: rgba(100,116,139,.08);
}
.ld3-status-group input[value="CONDUCTED"]:checked + label {
    border-color: var(--success); color: var(--success); background: rgba(22,163,74,.08);
    box-shadow: 0 0 0 3px rgba(22,163,74,.12);
}
.ld3-status-group input[value="CANCELED"]:checked + label {
    border-color: var(--danger); color: var(--danger); background: rgba(239,68,68,.08);
    box-shadow: 0 0 0 3px rgba(239,68,68,.12);
}

/* ── Custom file input ── */
.ld3-file-label {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    padding: .38rem .85rem;
    border-radius: 8px;
    border: 1.5px dashed var(--border);
    font-size: .82rem;
    font-weight: 600;
    color: var(--muted);
    background: var(--bg);
    cursor: pointer;
    transition: border-color .15s, color .15s, background .15s;
    white-space: nowrap;
}
.ld3-file-label:hover { border-color: var(--primary); color: var(--primary); background: rgba(99,102,241,.05); }
.ld3-file-label input[type="file"] { display: none; }
.ld3-file-name {
    font-size: .8rem;
    color: var(--text);
    font-weight: 500;
    max-width: 180px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.ld3-file-name:empty::before { content: attr(data-placeholder); color: var(--muted); font-style: italic; }

/* ── File chip with delete ── */
.ld3-file-chip-del {
    display: inline-flex;
    align-items: center;
    gap: 0;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--bg);
    overflow: hidden;
    font-size: .79rem;
}
.ld3-file-chip-del a {
    padding: .22rem .5rem .22rem .65rem;
    color: var(--primary);
    text-decoration: none;
}
.ld3-file-chip-del a:hover { text-decoration: underline; }
.ld3-file-chip-del button {
    background: none;
    border: none;
    border-left: 1px solid var(--border);
    padding: .22rem .5rem;
    color: var(--muted);
    cursor: pointer;
    font-size: .75rem;
    line-height: 1;
    transition: color .12s, background .12s;
}
.ld3-file-chip-del button:hover { color: var(--danger); background: rgba(239,68,68,.07); }

/* ── btn-sm: compact button ── */
.btn-sm {
    padding: .48rem .95rem;
    font-size: .82rem;
}

/* ── Section collapse button ── */
.td-collapse-btn {
    margin-left: auto;
    background: none;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0 .55rem;
    height: 28px;
    color: var(--muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    align-self: center;
    transition: color .15s, background .15s;
}
.td-collapse-btn:hover { color: var(--primary); background: var(--surface-strong); }
.td-collapse-btn svg { transition: transform .2s; display: block; }
.td-collapse-btn--collapsed svg { transform: rotate(180deg); }

/* ── Collapsed slots section ── */
.td-section--collapsed { padding-bottom: 1.5rem; }
.td-section--collapsed .td-section-head { margin-bottom: 0; }

/* ── Empty slot compact form controls ── */
.td-slot--empty .form-control {
    padding: .4rem .6rem;
    font-size: .8rem;
    border-radius: 12px;
}
.td-slot--empty .btn {
    padding: .38rem .7rem;
    font-size: .8rem;
    border-radius: 9px;
}

/* ── Autosave indicator ── */
.ld3-autosave-ind {
    display: block;
    font-size: .72rem;
    min-height: 1.1em;
    margin-top: .2rem;
    color: transparent;
    transition: color .25s;
    user-select: none;
}
.ld3-autosave-saving { color: var(--primary); }
.ld3-autosave-saved  { color: var(--success); }

/* make autosave textareas always fill full width */
.ld3-autosave-note {
    width: 100%;
    box-sizing: border-box;
    flex: none;
}

/* HW task block (student view) */
.ld3-hw-task-block {
    background: linear-gradient(135deg, rgba(99,102,241,.06), rgba(59,130,246,.04));
    border: 1px solid rgba(99,102,241,.2);
    border-left: 3px solid var(--primary);
    border-radius: 10px;
    padding: .75rem 1rem;
    margin-bottom: .85rem;
}
.ld3-hw-task-label {
    font-size: .7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .07em;
    color: var(--primary);
    margin-bottom: .35rem;
}
.ld3-hw-task-text {
    font-size: .9rem;
    line-height: 1.55;
    color: var(--text);
}

/* ── btn-success: green button ── */
.btn-success {
    background: var(--success);
    color: #fff;
}
.btn-success:hover {
    background: #15803d;
    transform: translateY(-1px);
}

/* ── Single-student HW block ── */
.ld3-hw-single-block {
    padding-top: .85rem;
    border-top: 1px solid var(--border);
    margin-top: .25rem;
}
.ld3-hw-single-head {
    display: flex;
    align-items: center;
    gap: .65rem;
    margin-bottom: .75rem;
}

/* ══════════════════════════════════════════════════════════════════
   Student dashboard pages  (sd-* / sl-*)
══════════════════════════════════════════════════════════════════ */
.sd-page {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.sd-hero {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) auto;
    gap: 1.5rem;
    align-items: start;
    padding: 1.8rem 2rem;
    border-radius: 28px;
    border: 1px solid rgba(59,130,246,.12);
    background:
        radial-gradient(circle at top left, rgba(59,130,246,.16), transparent 32%),
        linear-gradient(135deg, rgba(255,255,255,.98) 0%, rgba(244,247,251,.98) 100%);
    box-shadow: 0 10px 40px rgba(15,23,42,.06);
}

.sd-hero--projects {
    background:
        radial-gradient(circle at top left, rgba(22,163,74,.14), transparent 32%),
        linear-gradient(135deg, rgba(255,255,255,.98) 0%, rgba(244,247,251,.98) 100%);
}

.sd-hero--lessons {
    background:
        radial-gradient(circle at top left, rgba(245,158,11,.16), transparent 34%),
        linear-gradient(135deg, rgba(255,255,255,.98) 0%, rgba(244,247,251,.98) 100%);
}

.sd-hero-copy {
    min-width: 0;
}

.sd-hero-person {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.sd-kicker {
    display: inline-flex;
    align-items: center;
    padding: .32rem .72rem;
    border-radius: 999px;
    background: rgba(15,23,42,.06);
    color: var(--muted);
    font-size: .75rem;
    font-weight: 700;
    letter-spacing: .05em;
    text-transform: uppercase;
    margin-bottom: .85rem;
}

.sd-title {
    margin: 0;
    font-size: clamp(1.8rem, 2.7vw, 2.6rem);
    line-height: 1.02;
    letter-spacing: -.03em;
}

.sd-subtitle {
    margin: .65rem 0 0;
    max-width: 760px;
    color: var(--muted);
    font-size: .96rem;
    line-height: 1.6;
}

.sd-back-btn {
    margin-bottom: 1rem;
    width: fit-content;
}

.sd-back-btn:hover {
    text-decoration: none;
}

.sd-context-row {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
    margin-top: 1rem;
}

.sd-context-chip {
    display: inline-flex;
    align-items: center;
    padding: .38rem .78rem;
    border-radius: 999px;
    background: rgba(255,255,255,.88);
    border: 1px solid rgba(148,163,184,.22);
    color: var(--text);
    font-size: .8rem;
    font-weight: 600;
}

.sd-stats {
    display: grid;
    grid-template-columns: repeat(3, minmax(110px, 1fr));
    gap: .75rem;
    min-width: min(100%, 380px);
}

.sd-stat {
    display: flex;
    flex-direction: column;
    gap: .3rem;
    padding: .95rem 1rem;
    border-radius: 18px;
    background: rgba(255,255,255,.95);
    border: 1px solid rgba(148,163,184,.18);
    box-shadow: 0 4px 18px rgba(15,23,42,.04);
}

.sd-stat__value {
    font-size: 1.7rem;
    line-height: 1;
    font-weight: 800;
    letter-spacing: -.04em;
    color: var(--text);
}

.sd-stat__label {
    color: var(--muted);
    font-size: .78rem;
    font-weight: 600;
    line-height: 1.4;
}

.sd-section {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1.5rem;
    border-radius: 18px;
    background: var(--surface);
    border: 1px solid var(--border);
    box-shadow: 0 1px 4px rgba(15,23,42,.04);
}

.sd-section-head {
    display: flex;
    align-items: center;
    gap: .5rem;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.sd-section-title {
    font-size: .95rem;
    font-weight: 700;
    margin: 0;
}

.sd-grid {
    display: grid;
    gap: 1rem;
}

.sd-grid--cards {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.sd-card {
    border-radius: 18px;
    background: var(--surface);
    border: 1px solid var(--border);
    box-shadow: 0 1px 4px rgba(15,23,42,.04);
    overflow: hidden;
    transition: box-shadow .18s;
}

.sd-card:hover {
    box-shadow: 0 4px 18px rgba(15,23,42,.08);
}

.sd-card-top {
    display: flex;
    align-items: center;
    gap: .85rem;
    padding: 1.25rem;
}

.sd-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--_av-bg, var(--primary));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: .9rem;
    flex-shrink: 0;
    letter-spacing: -.02em;
}

.sd-card-copy {
    flex: 1;
    min-width: 0;
}

.sd-card-eyebrow {
    font-size: .75rem;
    font-weight: 700;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: .05em;
    margin-bottom: .25rem;
}

.sd-card-title {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 700;
    line-height: 1.3;
}

.sd-card-subtitle {
    margin: .2rem 0 0;
    font-size: .85rem;
    color: var(--muted);
}

.sd-chip-row {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
    padding: 0 1.25rem 1.25rem;
}

.sd-chip {
    font-weight: 600;
    white-space: nowrap;
}

.sd-chip--outline {
    border: 1px solid var(--border);
    color: var(--muted);
}

.sd-card-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: .85rem 1.25rem;
    background: var(--bg);
    border-top: 1px solid var(--border);
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    font-size: .85rem;
    transition: background .15s;
}

.sd-card-link:hover {
    background: rgba(99,102,241,.05);
    text-decoration: none;
}

.sd-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 3rem 2rem;
    text-align: center;
}

.sd-empty__orb {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, rgba(59,130,246,.2), rgba(59,130,246,.05));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.sd-empty__title {
    margin: 0;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text);
}

.sd-empty__text {
    margin: 0;
    color: var(--muted);
    font-size: .95rem;
    line-height: 1.6;
    max-width: 400px;
}

/* New layout for subjects and tutors */
.sd-layout {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 1.5rem;
    align-items: start;
}

.sd-subjects {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.sd-subject-card {
    padding: 1rem;
    border-radius: 18px;
    background: var(--surface);
    border: 1px solid var(--border);
    box-shadow: 0 1px 4px rgba(15,23,42,.04);
    cursor: pointer;
    transition: box-shadow .18s, border-color .18s;
}

.sd-subject-card:hover {
    box-shadow: 0 4px 18px rgba(15,23,42,.08);
    border-color: var(--primary);
}

.sd-subject-card h3 {
    margin: 0 0 .5rem;
    font-size: 1.1rem;
    font-weight: 700;
}

.sd-subject-card p {
    margin: 0;
    color: var(--muted);
    font-size: .85rem;
}

.sd-tutors-panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 1.5rem;
    box-shadow: 0 1px 4px rgba(15,23,42,.04);
    min-height: 400px;
    position: relative;
}

.sd-tutors-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--muted);
    font-size: .95rem;
    text-align: center;
}

.sd-tutors-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.sd-tutor-card {
    padding: 1rem;
    border-radius: 14px;
    background: var(--bg);
    border: 1px solid var(--border);
    cursor: pointer;
    transition: background .15s, border-color .15s;
}

.sd-tutor-card:hover {
    background: rgba(99,102,241,.05);
    border-color: var(--primary);
}

.sd-tutor-name {
    font-weight: 600;
    margin-bottom: .5rem;
}

.sd-tutor-stats {
    font-size: .8rem;
    color: var(--muted);
}

.sd-tutor-details {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

.sd-tutor-stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: .5rem;
    margin-bottom: 1rem;
}

.sd-tutor-stat {
    text-align: center;
    padding: .5rem;
    background: var(--bg);
    border-radius: 8px;
}

.sd-tutor-stat-value {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary);
}

.sd-tutor-stat-label {
    font-size: .7rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: .05em;
}

.sd-students-list {
    display: flex;
    flex-direction: column;
    gap: .5rem;
}

.sd-student-item {
    padding: .5rem;
    background: var(--bg);
    border-radius: 8px;
    border: 1px solid var(--border);
}

.sd-student-name {
    font-weight: 600;
    margin-bottom: .25rem;
}

.sd-lessons-list {
    margin-left: 1rem;
    font-size: .8rem;
    color: var(--muted);
}

.sd-lesson-item {
    margin-bottom: .25rem;
}

@media (max-width: 768px) {
    .sd-layout {
        grid-template-columns: 1fr;
    }
    .sd-subjects {
        flex-direction: row;
        overflow-x: auto;
        gap: .5rem;
        padding-bottom: .5rem;
    }
    .sd-subject-card {
        flex-shrink: 0;
        width: 200px;
    }
}

.sd-section {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.sd-section-head {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 1rem;
}

.sd-section-title {
    margin: 0;
    font-size: 1.15rem;
    font-weight: 800;
    letter-spacing: -.02em;
}

.sd-section-note {
    margin: .28rem 0 0;
    color: var(--muted);
    font-size: .88rem;
}

.sd-grid {
    display: grid;
    gap: 1rem;
}

.sd-grid--cards {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.sd-card {
    display: flex;
    flex-direction: column;
    gap: .95rem;
    min-width: 0;
    padding: 1.1rem;
    border-radius: 22px;
    background: #fff;
    border: 1px solid var(--border);
    box-shadow: 0 10px 30px rgba(15,23,42,.04);
}

.sd-card-top {
    display: flex;
    align-items: center;
    gap: .85rem;
    min-width: 0;
}

.sd-card-copy {
    min-width: 0;
    flex: 1;
}

.sd-card-eyebrow {
    margin-bottom: .2rem;
    color: var(--muted);
    font-size: .74rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .05em;
}

.sd-card-title {
    margin: 0;
    font-size: 1.04rem;
    font-weight: 800;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sd-card-subtitle {
    margin: .18rem 0 0;
    color: var(--muted);
    font-size: .84rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sd-avatar {
    width: 48px;
    height: 48px;
    border-radius: 16px;
    background: var(--_av-bg, var(--accent));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: .98rem;
    letter-spacing: -.02em;
    flex-shrink: 0;
}

.sd-avatar--lg {
    width: 56px;
    height: 56px;
    border-radius: 18px;
    font-size: 1.08rem;
}

.sd-project-icon {
    width: 48px;
    height: 48px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1rem;
    flex-shrink: 0;
}

.sd-chip-row,
.sl-lesson-badges {
    display: flex;
    flex-wrap: wrap;
    gap: .45rem;
}

.sd-chip {
    font-weight: 700;
    line-height: 1;
    white-space: nowrap;
}

.sd-chip--outline {
    border: 1px solid rgba(148,163,184,.26);
    background: rgba(248,250,252,.95);
    color: var(--text);
}

.sd-chip--neutral {
    background: rgba(100,116,139,.12);
    color: var(--muted);
}

.sd-chip--accent,
.sd-chip--scheduled {
    background: rgba(59,130,246,.12);
    color: var(--accent-strong);
}

.sd-chip--conducted,
.sd-chip--hw-accepted {
    background: rgba(22,163,74,.12);
    color: var(--success);
}

.sd-chip--canceled,
.sd-chip--hw-rejected {
    background: rgba(239,68,68,.12);
    color: var(--danger);
}

.sd-chip--warn,
.sd-chip--hw-under_review {
    background: rgba(245,158,11,.15);
    color: #b45309;
}

.sd-chip--hw-pending {
    background: rgba(99,102,241,.12);
    color: #4f46e5;
}

.sd-card-link {
    margin-top: auto;
    display: inline-flex;
    align-items: center;
    justify-content: space-between;
    gap: .8rem;
    padding: .8rem .95rem;
    border-radius: 16px;
    border: 1px solid rgba(148,163,184,.18);
    background: linear-gradient(135deg, rgba(248,250,252,.98), rgba(241,245,249,.98));
    color: var(--text);
    font-weight: 700;
    text-decoration: none;
    transition: transform .15s, border-color .15s, box-shadow .15s;
}

.sd-card-link:hover {
    text-decoration: none;
    border-color: rgba(59,130,246,.26);
    box-shadow: 0 8px 20px rgba(15,23,42,.06);
    transform: translateY(-1px);
}

.sd-card-link svg {
    width: 16px;
    height: 16px;
    color: var(--accent-strong);
    flex-shrink: 0;
}

.sd-empty {
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .85rem;
    padding: 2.4rem 1.5rem;
    text-align: center;
    background: linear-gradient(180deg, rgba(248,250,252,.96), rgba(255,255,255,.98));
    border: 1px dashed rgba(148,163,184,.35);
    border-radius: 28px;
}

.sd-empty__orb {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, rgba(59,130,246,.22), rgba(59,130,246,.06));
    border: 1px solid rgba(59,130,246,.14);
}

.sd-empty__title {
    margin: 0;
    font-size: 1.18rem;
    font-weight: 800;
}

.sd-empty__text {
    max-width: 620px;
    margin: 0;
    color: var(--muted);
    line-height: 1.65;
}

.sl-progress-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.sl-progress-card {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1.2rem 1.25rem;
    border-radius: 24px;
    border: 1px solid rgba(148,163,184,.16);
    background: linear-gradient(180deg, rgba(255,255,255,.98), rgba(248,250,252,.98));
    box-shadow: 0 12px 32px rgba(15,23,42,.05);
}

.sl-progress-card--primary {
    background:
        radial-gradient(circle at top left, rgba(59,130,246,.14), transparent 38%),
        linear-gradient(180deg, rgba(255,255,255,.98), rgba(248,250,252,.98));
}

.sl-progress-card--secondary {
    background:
        radial-gradient(circle at top left, rgba(245,158,11,.16), transparent 40%),
        linear-gradient(180deg, rgba(255,255,255,.98), rgba(248,250,252,.98));
}

.sl-progress-head {
    display: flex;
    align-items: start;
    justify-content: space-between;
    gap: 1rem;
}

.sl-progress-title {
    margin: 0;
    font-size: 1.05rem;
    font-weight: 800;
}

.sl-progress-note {
    margin: .3rem 0 0;
    color: var(--muted);
    font-size: .84rem;
    line-height: 1.55;
}

.sl-progress-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: .42rem .8rem;
    border-radius: 999px;
    background: rgba(59,130,246,.12);
    color: var(--accent-strong);
    font-size: .86rem;
    font-weight: 800;
    flex-shrink: 0;
}

.sl-progress-pill--homework {
    background: rgba(245,158,11,.14);
    color: #b45309;
}

.sl-progress-bar {
    height: 10px;
    border-radius: 999px;
    background: rgba(148,163,184,.18);
    overflow: hidden;
}

.sl-progress-bar span {
    display: block;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, #60a5fa, #2563eb);
}

.sl-progress-bar--homework span {
    background: linear-gradient(90deg, #fbbf24, #f59e0b);
}

.sl-progress-stats {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: .75rem;
}

.sl-progress-stat {
    display: flex;
    flex-direction: column;
    gap: .22rem;
    padding: .78rem .82rem;
    border-radius: 16px;
    background: rgba(255,255,255,.82);
    border: 1px solid rgba(148,163,184,.14);
}

.sl-progress-stat strong {
    font-size: 1.15rem;
    line-height: 1;
    font-weight: 800;
    letter-spacing: -.03em;
}

.sl-progress-stat span {
    color: var(--muted);
    font-size: .76rem;
    font-weight: 600;
}

.sl-journey {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.sl-step {
    display: grid;
    grid-template-columns: 46px minmax(0, 1fr);
    gap: 1rem;
    align-items: stretch;
}

.sl-step-rail {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100%;
}

.sl-step-dot {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: rgba(59,130,246,.12);
    color: var(--accent-strong);
    border: 1px solid rgba(59,130,246,.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .85rem;
    font-weight: 800;
    flex-shrink: 0;
}

.sl-step--conducted .sl-step-dot {
    background: rgba(22,163,74,.12);
    color: var(--success);
    border-color: rgba(22,163,74,.2);
}

.sl-step--conducted .sl-step-line {
    background: linear-gradient(180deg, rgba(22,163,74,.32), rgba(22,163,74,.08));
}

.sl-step--canceled .sl-step-dot {
    background: rgba(239,68,68,.12);
    color: var(--danger);
    border-color: rgba(239,68,68,.2);
}

.sl-step--canceled .sl-step-line {
    background: linear-gradient(180deg, rgba(239,68,68,.3), rgba(239,68,68,.08));
}

.sl-step-line {
    width: 2px;
    flex: 1;
    margin-top: .45rem;
    border-radius: 999px;
    background: linear-gradient(180deg, rgba(148,163,184,.32), rgba(148,163,184,.08));
}

.sl-step-card {
    display: flex;
    flex-direction: column;
    gap: .8rem;
    min-width: 0;
    padding: 1rem 1.05rem;
    border-radius: 22px;
    border: 1px solid var(--border);
    background: #fff;
    box-shadow: 0 10px 28px rgba(15,23,42,.04);
    color: var(--text);
    text-decoration: none;
    transition: transform .15s, border-color .15s, box-shadow .15s;
}

.sl-step--scheduled .sl-step-card {
    background: linear-gradient(180deg, rgba(239,246,255,.86), #fff 38%);
}

.sl-step--conducted .sl-step-card {
    background: linear-gradient(180deg, rgba(240,253,244,.86), #fff 38%);
}

.sl-step--canceled .sl-step-card {
    background: linear-gradient(180deg, rgba(254,242,242,.86), #fff 38%);
}

.sl-step-card:hover {
    text-decoration: none;
    transform: translateY(-1px);
    border-color: rgba(59,130,246,.22);
    box-shadow: 0 14px 34px rgba(15,23,42,.07);
}

.sl-step-top {
    display: flex;
    align-items: start;
    justify-content: space-between;
    gap: 1rem;
}

.sl-step-heading {
    min-width: 0;
}

.sl-step-kicker {
    margin-bottom: .2rem;
    color: var(--muted);
    font-size: .75rem;
    font-weight: 700;
    letter-spacing: .05em;
    text-transform: uppercase;
}

.sl-step-title {
    margin: 0;
    font-size: 1rem;
    font-weight: 800;
    line-height: 1.2;
}

.sl-step-date-badge {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 58px;
    min-height: 58px;
    border-radius: 18px;
    background: linear-gradient(180deg, rgba(241,245,249,.98), rgba(248,250,252,.98));
    border: 1px solid rgba(148,163,184,.18);
    flex-shrink: 0;
}

.sl-step-date-day {
    font-size: 1.2rem;
    line-height: 1;
    font-weight: 800;
    letter-spacing: -.03em;
}

.sl-step-date-mon {
    margin-top: .18rem;
    font-size: .67rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--muted);
    letter-spacing: .06em;
}

.sl-step-meta {
    display: flex;
    flex-wrap: wrap;
    gap: .3rem .8rem;
    color: var(--muted);
    font-size: .84rem;
}

.sl-step-foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.sl-step-open {
    display: inline-flex;
    align-items: center;
    gap: .45rem;
    color: var(--accent-strong);
    font-size: .84rem;
    font-weight: 700;
    white-space: nowrap;
}

.sl-step-open svg {
    width: 15px;
    height: 15px;
}

@media (max-width: 960px) {
    .sd-hero {
        grid-template-columns: 1fr;
    }

    .sd-stats {
        min-width: 0;
    }
}

@media (max-width: 720px) {
    .sd-hero {
        padding: 1.4rem 1.2rem;
        border-radius: 22px;
    }

    .sd-hero-person {
        align-items: flex-start;
    }

    .sd-stats {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .sd-grid--cards {
        grid-template-columns: 1fr;
    }

    .sl-progress-grid {
        grid-template-columns: 1fr;
    }

    .sl-progress-stats {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 560px) {
    .sd-stats {
        grid-template-columns: 1fr;
    }

    .sd-card,
    .sd-empty {
        border-radius: 20px;
    }

    .sl-step {
        grid-template-columns: 1fr;
        gap: .75rem;
    }

    .sl-step-rail {
        flex-direction: row;
        align-items: center;
        min-height: auto;
    }

    .sl-step-line {
        height: 2px;
        width: auto;
        margin-top: 0;
        margin-left: .45rem;
    }

    .sl-step-top {
        flex-direction: column;
    }

    .sl-step-date-badge {
        min-width: 62px;
    }
}