/* Shared teaching workspace. Editor and group styles remain in their modules. */
:root {
    --canvas: #f7f8f5;
    --surface: #ffffff;
    --surface-muted: #eff2ed;
    --text: #24342c;
    --text-soft: #667269;
    --line: #dfe5dc;
    --line-strong: #bec9bd;
    --accent: #2d5b43;
    --accent-hover: #204631;
    --accent-soft: #e6eee5;
    --sidebar-width: 240px;
    font-family: "Segoe UI Variable", "Segoe UI", -apple-system, BlinkMacSystemFont, sans-serif;
}
body { font-size: 15px; line-height: 1.5; }
h1 { font-size: clamp(1.65rem, 2.3vw, 2rem); font-weight: 650; }
button, .button, input, select { min-height: 44px; }
.icon-button { min-width: 44px; min-height: 44px; }
.page { width: min(1260px, 100%); padding: 36px 40px 72px; }
.sidebar { background: #fff; padding-top: 28px; }
.sidebar-nav { margin-top: 36px; gap: 5px; }
.nav-item { font-size: .92rem; min-height: 46px; }
.nav-item:hover { background: var(--canvas); }
.nav-item.active { background: var(--accent-soft); box-shadow: none; font-weight: 650; }
.brand-mark { width: 36px; height: 36px; border-radius: 8px; }
.page-header { margin-bottom: 28px; align-items: center; }
.page-header p { margin-top: 8px; line-height: 1.5; }
.list-surface { overflow: hidden; }
.student-row { min-height: 94px; padding: 20px 24px; }
.student-row:hover { background: #f4f7f1; }
.student-identity strong { font-size: 1rem; }
.student-identity span, .track-summary { line-height: 1.5; }
.avatar { background: #edf1e8; border-radius: 8px; color: var(--accent); }
.avatar-large { background: var(--accent-soft); }
.filter-bar { max-width: none; margin-bottom: 20px; }
.next-lesson { border: 1px solid var(--line); border-left: 3px solid var(--accent); padding: 26px; }
.next-lesson-main h2 { font-size: 1.4rem; margin: 4px 0; }
.next-lesson-time strong { font-size: 2rem; }
.today-layout { gap: 28px; grid-template-columns: minmax(0, 1.65fr) minmax(250px, 1fr); }
.day-timeline { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 20px 24px; align-self: start; }
.day-timeline .timeline-row { grid-template-columns: 52px 8px minmax(0, 1fr) auto 32px; gap: 10px; }
.timeline-row { min-height: 80px; }
.timeline-copy strong { font-size: .95rem; }
.timeline-copy span { font-size: .82rem; }
.timeline-row .icon-button { min-width: 32px; width: 32px; }
.today-aside .aside-section { padding: 0; border: 0; }
.today-aside .action-row { min-height: 62px; }
.upcoming-group-section { margin-top: 24px; }
.group-agenda-row { display: grid; grid-template-columns: 56px minmax(0, 1fr) auto; gap: 12px; align-items: center; padding: 18px 0; border-bottom: 1px solid var(--line); color: var(--text); }
.group-agenda-row time { font-variant-numeric: tabular-nums; color: var(--text-soft); }
.group-agenda-row > span { min-width: 0; display: grid; gap: 3px; }
.group-agenda-row > span > span { font-size: .82rem; color: var(--text-soft); }
.group-agenda-row strong { font-weight: 650; overflow-wrap: anywhere; }
.recent-materials { margin-top: 32px; }
.resource-links { display: flex; flex-wrap: wrap; gap: 8px 24px; padding: 16px 0; border-top: 1px solid var(--line); }
.resource-links a { display: inline-flex; align-items: center; gap: 9px; min-height: 44px; font-size: .9rem; }
.resource-links .icon { color: var(--text-soft); }
.resource-links a > span { display: grid; gap: 4px; }
.resource-links small { font-size: .78rem; color: var(--text-soft); }
.resource-links a { padding: 10px 0; flex: 1 1 280px; }
.resource-links a > .icon:last-child { margin-left: auto; }
.resource-links a strong { font-weight: 600; }
.group-agenda-row small { color: var(--text-soft); font-size: .82rem; }
.detail-layout { grid-template-columns: minmax(0, 1fr) 260px; gap: 32px; }
.track-list { display: grid; gap: 12px; }
.track-row { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 20px; display: block; }
.track-copy strong { font-size: 1.05rem; }
.track-row .row-actions { margin-top: 16px; justify-content: flex-start; flex-wrap: wrap; gap: 8px; }
.track-tools-row { display: flex; align-items: center; flex-wrap: wrap; gap: 4px 16px; padding-top: 12px; margin-top: 12px; border-top: 1px solid var(--line); }
.track-tools-row a { display: inline-flex; align-items: center; gap: 7px; font-size: .82rem; min-height: 40px; }
.track-tools-row .track-tools-settings { margin-left: auto; color: var(--text-soft); }
.lesson-detail-header { margin-top: 20px; padding-bottom: 24px; }
.lesson-detail-layout { grid-template-columns: minmax(0, 1fr) 240px; gap: 32px; }
.lesson-detail-main { min-width: 0; }
.lesson-facts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px 24px; }
.lesson-facts > div { display: block; padding: 0; border: 0; min-width: 0; }
.lesson-facts dt { font-size: .8rem; margin-bottom: 5px; }
.lesson-facts dd { font-size: .93rem; overflow-wrap: normal; word-break: normal; }
.lesson-overview { padding: 24px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); }
.lesson-overview .fallback-link-row { margin-top: 20px; padding-top: 16px; }
.lesson-section { padding: 24px 0; }
.recording-disclosure { margin-top: 24px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.recording-disclosure summary { padding: 18px 0; cursor: pointer; font-weight: 650; display: list-item; list-style-position: inside; }
.recording-disclosure summary span { color: var(--text-soft); font-size: .83rem; font-weight: 400; margin-left: 8px; }
.recording-disclosure .lesson-section { border: 0; padding-top: 4px; }
.lesson-detail-aside .danger-zone { background: none; border: 0; border-top: 1px solid var(--line); padding: 20px 0 0; }
.lesson-detail-aside .danger-zone .button-danger { background: transparent; border: 1px solid #dbb9b6; color: var(--danger); }
.form-surface { padding: 28px; }
.form-control { background: #fff; border-color: var(--line-strong); }
.form-field label { line-height: 1.45; }
.form-grid { gap: 22px; }
.form-grid > *, .homework-detail-layout > *, .review-layout > * { min-width: 0; }
.form-control, input[type='file'] { max-width: 100%; }
input[type='file']::file-selector-button { border: 1px solid var(--line); background: var(--surface-muted); color: var(--text); border-radius: 5px; padding: 8px 10px; margin-right: 10px; cursor: pointer; }
.assignment-sheet { background: #f0f4eb; }
.homework-attempt { padding: 16px 0; border-top: 1px solid var(--line); }
.homework-attempt summary { cursor: pointer; color: var(--accent); line-height: 1.6; }
.homework-attempt[open] summary { margin-bottom: 16px; }
.form-actions { display: flex; align-items: center; gap: 12px; margin-top: 24px; }
.workspace-settings-layout { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(280px, 1fr); gap: 48px; }
.preferences-form { background: var(--surface); border: 1px solid var(--line); padding: 28px; border-radius: 8px; align-self: start; }
.settings-description { font-size: .9rem; color: var(--text-soft); margin: 12px 0 20px; }
.tool-options { border-top: 1px solid var(--line); }
.tool-option { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 20px 0; border-bottom: 1px solid var(--line); cursor: pointer; }
.tool-option > span { display: grid; gap: 6px; min-width: 0; }
.tool-option > span > span { color: var(--text-soft); font-size: .86rem; line-height: 1.5; }
.tool-option input { accent-color: var(--accent); min-height: 22px; width: 22px; height: 22px; flex: 0 0 22px; cursor: pointer; }
.settings-footnote { color: var(--text-soft); margin: 18px 0 0; font-size: .8rem; line-height: 1.6; }
.workspace-library h2 { padding: 4px 0 16px; }
.tool-link { display: grid; grid-template-columns: 22px minmax(0, 1fr) 20px; align-items: center; gap: 16px; color: var(--text); padding: 20px 0; border-bottom: 1px solid var(--line); }
.tool-link:hover { color: var(--accent); }
.tool-link > span { display: grid; gap: 5px; }
.tool-link > span > span { color: var(--text-soft); font-size: .83rem; }
.tool-link > .icon { color: var(--text-soft); }
.demo-toolbar { display: flex; flex-wrap: wrap; justify-content: flex-end; align-items: center; gap: 16px; padding: 6px 40px; font-size: .75rem; background: #edf2e9; border-bottom: 1px solid var(--line); }
.demo-toolbar > span { color: var(--text-soft); margin-right: auto; }
.demo-toolbar a { padding: 5px 0; }
.skip-link { position: fixed; top: -100px; left: 16px; background: var(--accent); color: white; padding: 12px 20px; z-index: 1000; }
.skip-link:focus { top: 12px; }
.error-panel { max-width: 560px; padding: 48px 0; margin: 0 auto; }
.error-code { color: var(--text-soft); display: block; margin-bottom: 16px; font-variant-numeric: tabular-nums; }
.error-panel p { color: var(--text-soft); margin: 18px 0 28px; }
.error-panel .button { margin: 0 8px 8px 0; }
.button[aria-busy='true'] { opacity: .7; cursor: wait; }
.room-board-links { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; padding-bottom: 20px; }
.room-board-links > span { color: var(--text-soft); font-size: .8rem; }
.section-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 8px 16px; font-size: .84rem; }
.view-tabs .view-tabs-shortcut { margin-left: auto; }
.board-filter-note { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 8px 16px; padding: 10px 0 18px; color: var(--text-soft); font-size: .84rem; }
.homework-attempts { margin-top: 24px; }
@media (max-width: 1199px) {
    .page { padding: 28px; }
    .lesson-detail-layout { grid-template-columns: minmax(0, 1fr); }
    .lesson-detail-aside { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
    .lesson-detail-aside .aside-section { border-left: 0; padding-left: 0; }
    .workspace-settings-layout { gap: 28px; }
    .detail-layout { grid-template-columns: minmax(0, 1fr); }
    .detail-aside { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .homework-detail-layout, .review-layout { grid-template-columns: minmax(0, 1fr); }
    .assignment-sheet { min-height: 0; }
}
@media (min-width: 701px) and (max-width: 1000px) {
    :root { --sidebar-width: 76px; }
    .sidebar { padding: 24px 12px; }
    .sidebar .brand { padding: 0 7px; }
    .sidebar .brand-name, .account-copy { display: none; }
    .sidebar .nav-item span { display: block; position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; }
    .sidebar .nav-item { justify-content: center; padding: 0; }
    .sidebar-account { padding-left: 0; padding-right: 0; }
    .today-layout, .workspace-settings-layout { grid-template-columns: minmax(0, 1fr); }
    .today-aside { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
    .lesson-facts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 700px) {
    body { font-size: 15px; }
    .app-layout { display: block; }
    .sidebar { display: none; }
    .page { padding: 22px 18px calc(90px + env(safe-area-inset-bottom)); }
    .mobile-header { display: flex; background: #fff; padding: 12px 18px; }
    .mobile-nav { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); background: #fff; border-top: 1px solid var(--line); }
    .mobile-nav .nav-item { min-width: 0; min-height: 58px; gap: 3px; display: flex; flex-direction: column; justify-content: center; padding: 6px 2px; border-radius: 0; font-size: .7rem; }
    .mobile-nav .nav-item.active { background: transparent; color: var(--accent); }
    .mobile-nav .icon { width: 21px; height: 21px; }
    .demo-toolbar { padding: 5px 18px; gap: 14px; font-size: .72rem; }
    .page-header { gap: 16px; margin-bottom: 24px; }
    .page-header h1 { font-size: 1.7rem; }
    .page-header p { font-size: .85rem; }
    .page-actions { justify-content: flex-start; }
    .student-row { padding: 18px; min-height: 90px; }
    .student-identity { gap: 12px; }
    .student-identity strong { font-size: .95rem; }
    .next-lesson { padding: 20px; gap: 16px; }
    .next-lesson-time strong { font-size: 1.75rem; }
    .next-lesson-main h2 { font-size: 1.2rem; }
    .next-lesson-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
    .next-lesson-actions > form { flex: 1; }
    .next-lesson-actions > a { width: auto; }
    .today-layout, .workspace-settings-layout, .detail-aside, .lesson-detail-aside { grid-template-columns: minmax(0, 1fr); gap: 24px; }
    .workspace-library { order: -1; }
    .day-timeline { padding: 18px; }
    .day-timeline .timeline-row { grid-template-columns: 44px minmax(0, 1fr) 30px; gap: 10px; }
    .day-timeline .timeline-marker { display: none; }
    .day-timeline .timeline-row > .status { grid-column: 2; font-size: .75rem; }
    .day-timeline .timeline-row .icon-button { grid-column: 3; grid-row: 1 / 3; }
    .day-timeline .timeline-row { padding: 12px 0; min-height: 80px; }
    .timeline-copy strong, .timeline-copy span { white-space: normal; }
    .track-row { padding: 18px; }
    .track-tools-row .track-tools-settings { margin-left: 0; }
    .lesson-overview { padding: 18px; }
    .lesson-facts { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px 16px; }
    .lesson-facts dd { font-size: .88rem; overflow-wrap: anywhere; }
    .lesson-detail-header { gap: 20px; }
    .lesson-primary-actions { flex-wrap: wrap; }
    .form-surface, .preferences-form { padding: 20px; }
    .homework-detail-layout { margin-inline: 0; gap: 20px; }
    .assignment-sheet, .homework-submit-form { border: 1px solid var(--line); border-radius: 8px; }
    .form-actions { flex-wrap: wrap; }
    .tool-option { gap: 16px; }
    .recording-disclosure summary span { display: block; margin: 6px 0 0 18px; }
    .resource-links { gap: 4px 20px; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; } }

.first-steps { padding: 8px 0 30px; margin-bottom: 26px; border-bottom: 1px solid var(--line); }
.first-steps p { max-width: 540px; margin: 8px 0 20px; color: var(--text-soft); }
.first-steps .button { margin: 0 8px 8px 0; }
.onboarding-form .tool-option { padding-block: 15px; }
.onboarding-form .settings-footnote { grid-column: 1 / -1; margin: 0; }
.invite-replace { margin-top: 12px; font-size: .78rem; color: var(--text-soft); }
.invite-replace summary { cursor: pointer; padding: 6px 0; }
.invite-replace p { margin: 6px 0; }
.copy-fallback { width: 100%; min-width: 0; margin-top: 8px; }