:root {
    --sga-font-sans: "Google Sans Flex", "Google Sans", Inter, Aptos, "Segoe UI Variable", "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    --sga-canvas: #f7f6f2;
    --sga-surface: #ffffff;
    --sga-surface-soft: #f1f0ec;
    --sga-ink: #17191f;
    --sga-muted: #6f7279;
    --sga-line: #deddd8;
    --sga-sidebar: #f3f1eb;
    --sga-blue: #1769e8;
    --sga-gold: #caa334;
    --sga-success: #39885a;
    --sga-shadow: 0 12px 32px rgba(23, 25, 31, .06);
}

html[data-theme="dark"] {
    --sga-canvas: #111313;
    --sga-surface: #1c1f1f;
    --sga-surface-soft: #252828;
    --sga-ink: #f3f3f1;
    --sga-muted: #aaaca9;
    --sga-line: #373a39;
    --sga-sidebar: #141616;
    --sga-blue: #3683f7;
    --sga-gold: #d2ad3f;
    --sga-success: #62ad75;
    --sga-shadow: 0 16px 38px rgba(0, 0, 0, .22);
    --ink: var(--sga-ink);
    --muted: var(--sga-muted);
    --paper: var(--sga-surface);
    --canvas: var(--sga-canvas);
    --line: var(--sga-line);
    --navy: var(--sga-ink);
}

body {
    color: var(--sga-ink);
    background: var(--sga-canvas);
    font-family: var(--sga-font-sans);
}
.sr-only { position: absolute !important; width: 1px !important; height: 1px !important; padding: 0 !important; margin: -1px !important; overflow: hidden !important; clip: rect(0, 0, 0, 0) !important; white-space: nowrap !important; border: 0 !important; }

.app-shell { display: grid; min-height: 100vh; grid-template-columns: 248px minmax(0, 1fr); background: var(--sga-canvas); }
.sidebar {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    color: var(--sga-muted);
    background: var(--sga-sidebar);
    box-shadow: inset -1px 0 0 var(--sga-line);
}
.sidebar-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .45rem;
    padding: 1.5rem 1.25rem 1.2rem;
    color: var(--sga-ink);
    background: transparent;
    border: 0;
    border-radius: 0;
    box-shadow: none;
}
.sidebar-brand-logo { width: 88px; height: 88px; padding: 0; object-fit: contain; background: transparent; border-radius: 0; filter: none; }
.sidebar-brand-copy { display: grid; justify-items: center; min-width: 0; }
.sidebar-brand-title { color: var(--sga-ink); font-size: 1.35rem; line-height: 1; letter-spacing: -.025em; }
.sidebar-brand-subtitle { display: none; }
.sidebar-brand-role, .sidebar-brand-user { display: none; }
.sidebar-nav { flex: 1; min-width: 0; gap: .3rem; padding: .65rem 1rem 1.25rem; }
.sidebar .nav-section-group { margin: .25rem 0 .35rem; border-radius: .65rem; }
.sidebar .nav-section-heading { min-height: 38px; padding: .65rem .75rem .4rem; color: var(--sga-muted); list-style: none; cursor: pointer; pointer-events: auto; }
.sidebar .nav-section-heading::-webkit-details-marker { display: none; }
.sidebar .nav-section-caret { display: grid; width: 16px; height: 16px; margin-left: auto; place-items: center; color: var(--sga-muted); transform: rotate(0deg); transition: transform .18s ease; }
.sidebar .nav-section-caret .nav-svg { width: 14px; height: 14px; }
.sidebar .nav-section-group[open] .nav-section-caret { transform: rotate(90deg); }
.sidebar .nav-section-content { gap: .15rem; padding: .05rem 0 .3rem; }
.nav-link, .nav-sub-link { align-items: center; min-width: 0; min-height: 46px; gap: .8rem; padding: .72rem .85rem; color: var(--sga-muted); border-radius: .6rem; }
.nav-link { width: 100%; }
.nav-sub-link { width: auto; min-height: 40px; margin: .08rem .1rem .08rem 1.5rem; padding-block: .55rem; }
.sidebar .nav-label { min-width: 0; overflow-wrap: anywhere; line-height: 1.35; }
.nav-icon { width: 20px; height: 20px; flex-basis: 20px; color: currentColor; }
.nav-svg { width: 20px; height: 20px; stroke-width: 1.75; }
.nav-icon-sub, .nav-sub-link .nav-svg { width: 18px; height: 18px; flex-basis: 18px; }
.nav-sub-heading { padding-left: 3.2rem; color: var(--sga-muted); font-size: .66rem; letter-spacing: .08em; }
.nav-link:hover, .nav-sub-link:hover { color: var(--sga-ink); background: var(--sga-surface-soft); }
.nav-link.is-active, .nav-sub-link.is-active {
    color: var(--sga-ink);
    background: color-mix(in srgb, var(--sga-gold) 12%, var(--sga-surface));
    box-shadow: inset 2px 0 0 var(--sga-gold), 0 1px 0 color-mix(in srgb, var(--sga-gold) 12%, transparent);
}
.nav-link.is-active .nav-icon, .nav-sub-link.is-active .nav-icon { color: var(--sga-gold); }
.sidebar-open-class { margin: .1rem 0 .6rem; padding: .7rem .75rem; color: var(--sga-muted); border-color: var(--sga-line); background: var(--sga-surface); }
.sidebar-open-class.is-live { border-color: color-mix(in srgb, var(--sga-success) 42%, var(--sga-line)); background: color-mix(in srgb, var(--sga-success) 8%, var(--sga-surface)); }
.sidebar-open-class-head { color: var(--sga-ink); }
.sidebar-open-class small { color: var(--sga-muted); }
.sidebar-open-class-actions a, .sidebar-open-class-actions button, .sidebar-open-class-link { color: var(--sga-ink); border-color: var(--sga-line); background: var(--sga-surface-soft); }
.sidebar-footer { display: grid; grid-template-columns: 40px minmax(0, 1fr); align-items: center; gap: .8rem; margin: auto 1rem 0; padding: 1rem 0 1.15rem; color: var(--sga-muted); border-color: var(--sga-line); }
.sidebar-user-avatar { display: grid; width: 40px; height: 40px; object-fit: cover; place-items: center; color: var(--sga-ink); background: color-mix(in srgb, var(--sga-gold) 12%, var(--sga-surface-soft)); border: 1px solid var(--sga-line); border-radius: 50%; font-weight: 700; }
.sidebar-user-copy { display: grid; min-width: 0; gap: .08rem; }
.sidebar-user-copy strong { color: var(--sga-ink); font-size: .82rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sidebar-user-copy small { color: var(--sga-muted); font-size: .7rem; }

.main-panel { min-width: 0; background: var(--sga-canvas); }
.topbar {
    height: 72px;
    color: var(--sga-ink);
    background: color-mix(in srgb, var(--sga-canvas) 90%, transparent);
    border-bottom: 1px solid var(--sga-line);
    backdrop-filter: blur(18px);
}
.topbar .brand, .topbar-user-name, .topbar-user-role, .topbar-clock, .link-button { color: var(--sga-ink); }
.topbar-icon-button, .sidebar-toggle { color: var(--sga-ink); background: var(--sga-surface); border: 1px solid var(--sga-line); }
.topbar-context-switcher select { min-height: 40px; color: var(--sga-ink); background: var(--sga-surface); border-color: var(--sga-line); }
.topbar-icon-button .nav-svg, .sidebar-toggle .nav-svg { width: 20px; height: 20px; }
.user-menu { display: flex; align-items: center; gap: .65rem; min-width: 0; }
.topbar-avatar {
    display: grid;
    flex: 0 0 40px;
    width: 40px;
    height: 40px;
    min-width: 40px;
    max-width: 40px;
    max-height: 40px;
    overflow: hidden;
    object-fit: cover;
    object-position: center;
    place-items: center;
    color: var(--sga-ink);
    background: var(--sga-surface-soft);
    border: 1px solid var(--sga-line);
    border-radius: 50%;
    font-weight: 700;
}
.topbar-user-info { display: flex; align-items: center; gap: .3rem; min-width: 0; line-height: 1.2; }
.topbar-user-name { max-width: 10.5rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: .84rem; font-weight: 700; }
.topbar-user-role { white-space: nowrap; color: var(--sga-muted); font-size: .72rem; }
.theme-toggle { display: inline-grid; grid-template-columns: 1fr; place-items: center; }
.theme-toggle .theme-icon { display: inline-grid !important; grid-area: 1 / 1; }
.theme-toggle .theme-icon-dark, html[data-theme="dark"] .theme-toggle .theme-icon-light { display: none !important; }
html[data-theme="dark"] .theme-toggle .theme-icon-dark { display: inline-grid !important; }
.topbar-logout { display: inline-flex; align-items: center; gap: .35rem; }
.topbar-logout .nav-svg { width: 18px; height: 18px; }
.content-area { width: min(1480px, 100%); padding: clamp(1rem, 2.5vw, 2.35rem); }

.card, .dashboard-summary-card, .dashboard-admin-card, .dashboard-teaching-stats,
.agenda-board, .mini-calendar, .calendar-shell, .calendar-toolbar, .integration-card {
    color: var(--sga-ink);
    border-color: var(--sga-line);
    background: var(--sga-surface);
    box-shadow: var(--sga-shadow);
}
.dashboard-hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(220px, auto);
    align-items: start;
    gap: 2rem;
    margin-bottom: 2rem;
    padding: clamp(1.35rem, 3vw, 2.25rem);
    color: var(--sga-ink);
    border: 1px solid var(--sga-line);
    border-radius: 14px;
    background: var(--sga-surface);
    box-shadow: var(--sga-shadow);
}
.dashboard-hero::after { display: none; }
.dashboard-hero h1 { max-width: 22ch; margin: .25rem 0 .65rem; font-size: clamp(2rem, 4vw, 3.2rem); line-height: 1.02; letter-spacing: -.035em; }
.dashboard-hero h1, .dashboard-hero p, .dashboard-hero .eyebrow { color: inherit; }
.dashboard-hero .eyebrow { color: var(--sga-gold); }
.dashboard-context { display: grid; gap: .25rem; padding: 1rem; border: 1px solid var(--sga-line); border-radius: 10px; background: var(--sga-surface-soft); }
.dashboard-context span, .dashboard-context small, .dashboard-section-heading > p { color: var(--sga-muted); }
.dashboard-section { margin-bottom: 2rem; }
.dashboard-section-heading { display: flex; align-items: end; justify-content: space-between; gap: 1rem; margin-bottom: 1rem; }
.dashboard-section-heading h2 { margin: .2rem 0 0; }
.dashboard-section-heading > p { max-width: 42rem; margin: 0; }
.dashboard-summary-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.dashboard-summary-card { display: flex; align-items: center; gap: .9rem; min-height: 104px; padding: 1.1rem; text-decoration: none; border: 1px solid var(--sga-line); background: var(--sga-surface); }
.dashboard-summary-card > span:last-child { display: grid; min-width: 0; }
.dashboard-summary-card small { color: var(--sga-muted); font-size: .72rem; font-style: normal; text-transform: uppercase; letter-spacing: .07em; }
.dashboard-summary-card strong { font-size: 1.45rem; line-height: 1.1; }
.dashboard-summary-card em { color: var(--sga-muted); font-size: .78rem; font-style: normal; }
.dashboard-card-mark { display: grid; flex: 0 0 44px; width: 44px; height: 44px; place-items: center; border-radius: 10px; font-weight: 800; }
.dashboard-admin-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 1rem; }
.dashboard-admin-card { display: grid; gap: .45rem; min-height: 150px; padding: 1.15rem; border: 1px solid var(--sga-line); border-top: 3px solid var(--sga-gold); background: var(--sga-surface); }
.dashboard-admin-card > strong { font-size: 2rem; }
.dashboard-admin-card > a { align-self: end; text-decoration: none; font-weight: 700; }
.dashboard-teaching-stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); overflow: hidden; margin-bottom: 1rem; border: 1px solid var(--sga-line); background: var(--sga-surface); }
.dashboard-teaching-stats > div { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1rem 1.2rem; border-right: 1px solid var(--sga-line); }
.dashboard-teaching-stats > div:last-child { border-right: 0; }
.dashboard-teaching-stats span { color: var(--sga-muted); }
.dashboard-teaching-stats strong { font-size: 1.45rem; }
.dashboard-content-grid { display: grid; grid-template-columns: minmax(0, 2fr) minmax(260px, .8fr); gap: 1rem; align-items: start; }
.dashboard-summary-card, .dashboard-admin-card, .dashboard-teaching-stats { border-radius: 12px; }
.dashboard-admin-card { border-top-color: var(--sga-gold); }
.dashboard-summary-card strong, .dashboard-admin-card > strong, .dashboard-teaching-stats strong { color: var(--sga-ink); }
.dashboard-card-mark { color: var(--sga-ink); background: #f2e5b8; }
.dashboard-card-mark.is-calendar, .dashboard-card-mark.is-profile { color: #fff; background: #274d77; }
.schedule-list > div, .event-list > div { border-color: var(--sga-line); }
.schedule-list a, .dashboard-admin-card > a { color: var(--sga-blue); }

.calendar-heading, .calendar-heading h1, .calendar-heading p { color: var(--sga-ink); }
.calendar-shell { border-radius: 14px; }
.calendar-toolbar { box-shadow: none; }
.calendar-nav a, .segmented, .segmented a.active { color: var(--sga-ink); background: var(--sga-surface-soft); }
.agenda-day, .agenda-item { color: var(--sga-ink); border-color: var(--sga-line); background: var(--sga-surface); box-shadow: none; }
.agenda-day.is-today > header strong, .mini-days a:hover, .mini-days a.today { color: #161616; background: var(--sga-gold); }
.agenda-item { border-left-color: var(--event-color, var(--sga-blue)); }
.agenda-actions a { color: var(--sga-blue); }

button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--sga-blue) 40%, transparent);
    outline-offset: 2px;
}

@media (max-width: 1050px) {
    .app-shell { grid-template-columns: 240px minmax(0, 1fr); }
    .dashboard-content-grid, .dashboard-grid, .calendar-layout { grid-template-columns: 1fr; }
    .mini-calendar { max-width: none; }
}

@media (max-width: 760px) {
    .app-shell { display: block; }
    .sidebar { position: fixed; width: min(88vw, 320px); }
    .sidebar-brand-logo { width: 76px; height: 76px; }
    .topbar { height: 64px; padding-inline: .75rem; }
    .sidebar-toggle { display: inline-grid; place-items: center; min-width: 44px; min-height: 44px; }
    .topbar .brand { max-width: 34vw; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
    .topbar-user-info, .topbar-clock, .topbar-divider, .topbar-report-button { display: none; }
    .content-area { padding: .9rem; }
    .dashboard-hero { grid-template-columns: 1fr; gap: 1rem; }
    .dashboard-section-heading { align-items: stretch; flex-direction: column; }
    .dashboard-summary-grid, .dashboard-teaching-stats { grid-template-columns: 1fr; }
    .dashboard-teaching-stats > div { border-right: 0; border-bottom: 1px solid var(--sga-line); }
    .dashboard-teaching-stats > div:last-child { border-bottom: 0; }
    .calendar-toolbar { align-items: stretch; }
    .nav-link, .nav-sub-link { min-height: 44px; }
    .topbar-logout span { display: none; }
}

@media (prefers-reduced-motion: reduce) {
    .sidebar .nav-section-caret { transition: none; }
}