:root {
    --bg: #fbf9f8;
    --surface: #ffffff;
    --surface-low: #f6f3f2;
    --surface-mid: #f0eded;
    --surface-strong: #e4e2e1;
    --line: #bec9be;
    --line-soft: #e4e9e3;
    --ink: #1b1c1c;
    --muted: #5d675f;
    --primary: #004d27;
    --primary-strong: #006837;
    --primary-soft: #dff5e6;
    --primary-tint: #8ee4a6;
    --secondary: #3a5f94;
    --secondary-soft: #d5e3ff;
    --danger-soft: #ffdad6;
    --danger: #ba1a1a;
    --warning-soft: #fff4cf;
    --radius: 14px;
    --shadow: 0 6px 18px rgba(18, 33, 24, 0.06);
    --sidebar: 236px;
    --sidebar-closed: 76px;
}

* {
    box-sizing: border-box;
}

body {
    background: var(--bg);
    color: var(--ink);
    font-family: "Lexend", Arial, sans-serif;
    font-weight: 400;
    margin: 0;
    min-height: 100vh;
}

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

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

.material-symbols-outlined {
    display: inline-block;
    font-size: 20px;
    font-variation-settings: "FILL" 0, "wght" 400, "GRAD" 0, "opsz" 24;
    vertical-align: middle;
}

.sidebar {
    background: var(--surface);
    border-right: 1px solid var(--line-soft);
    bottom: 0;
    left: 0;
    padding: 22px 16px;
    position: fixed;
    top: 0;
    transition: width 180ms ease, padding 180ms ease;
    width: var(--sidebar);
    z-index: 20;
}

.brand-row {
    align-items: center;
    display: flex;
    justify-content: space-between;
    margin-bottom: 34px;
}

.brand {
    align-items: center;
    display: flex;
}

.brand img {
    display: block;
    height: auto;
}

.brand .brand-full {
    max-width: 178px;
    width: 100%;
}

.brand .brand-collapsed {
    display: none;
    height: 48px;
    object-fit: contain;
    width: 48px;
}

.sidebar-toggle {
    align-items: center;
    background: var(--surface-low);
    border: 1px solid var(--line-soft);
    border-radius: 12px;
    color: var(--muted);
    cursor: pointer;
    display: inline-flex;
    height: 38px;
    justify-content: center;
    padding: 0;
    transition: background 160ms ease, color 160ms ease;
    width: 38px;
}

.sidebar-toggle:hover {
    background: var(--primary-soft);
    color: var(--primary);
}

.side-nav {
    display: grid;
    gap: 6px;
}

.side-nav a {
    align-items: center;
    border-radius: 10px;
    color: var(--muted);
    display: flex;
    font-size: 14px;
    font-weight: 500;
    gap: 12px;
    min-height: 44px;
    padding: 0 12px;
    position: relative;
    transition: background 160ms ease, color 160ms ease;
    white-space: nowrap;
}

.side-nav a:hover {
    background: var(--surface-low);
    color: var(--primary);
}

.side-nav a.active {
    background: var(--surface-low);
    color: var(--primary);
}

.side-nav a.active::after {
    background: var(--primary);
    border-radius: 999px;
    bottom: 8px;
    content: "";
    position: absolute;
    right: -16px;
    top: 8px;
    width: 4px;
}

.side-nav a.active .material-symbols-outlined {
    color: var(--primary);
    font-variation-settings: "FILL" 1, "wght" 400, "GRAD" 0, "opsz" 24;
}

.sidebar-footer {
    align-items: center;
    border-top: 1px solid var(--line-soft);
    bottom: 22px;
    color: var(--muted);
    display: flex;
    gap: 10px;
    left: 16px;
    padding-top: 18px;
    position: absolute;
    right: 16px;
}

.sidebar-footer strong {
    color: var(--ink);
    display: block;
    font-size: 12px;
    font-weight: 600;
}

.sidebar-footer small {
    display: block;
    font-size: 11px;
}

.app-shell {
    margin-left: var(--sidebar);
    min-height: 100vh;
    transition: margin-left 180ms ease;
}

body.sidebar-collapsed .sidebar {
    padding-left: 14px;
    padding-right: 14px;
    width: var(--sidebar-closed);
}

body.sidebar-collapsed .app-shell {
    margin-left: var(--sidebar-closed);
}

body.sidebar-collapsed .brand-row {
    flex-direction: column;
    gap: 18px;
}

body.sidebar-collapsed .brand .brand-full {
    display: none;
}

body.sidebar-collapsed .brand .brand-collapsed {
    display: block;
}

body.sidebar-collapsed .side-nav a {
    justify-content: center;
    padding: 0;
}

body.sidebar-collapsed .nav-label,
body.sidebar-collapsed .sidebar-footer div {
    display: none;
}

body.sidebar-collapsed .sidebar-footer {
    justify-content: center;
}

.topbar {
    align-items: center;
    background: rgba(255, 255, 255, 0.92);
    border-bottom: 1px solid var(--line-soft);
    backdrop-filter: blur(12px);
    display: flex;
    gap: 24px;
    justify-content: space-between;
    min-height: 72px;
    padding: 0 30px;
    position: sticky;
    top: 0;
    z-index: 15;
}

.topbar-copy {
    display: grid;
    flex: 0 1 auto;
    gap: 3px;
    min-width: 220px;
}

.breadcrumbs {
    color: var(--muted);
    display: flex;
    flex-wrap: wrap;
    font-size: 12px;
    gap: 6px;
    margin: 0;
}

.breadcrumbs span {
    color: #9aa59d;
}

.topbar h1 {
    color: var(--primary);
    font-size: 18px;
    font-weight: 600;
    margin: 0;
}

.top-actions {
    align-items: center;
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    min-width: 0;
}

.session-pill {
    align-items: center;
    background: var(--surface-low);
    border: 1px solid var(--line-soft);
    border-radius: 999px;
    color: var(--primary);
    display: inline-flex;
    font-size: 12px;
    font-weight: 500;
    min-height: 32px;
    max-width: 210px;
    overflow: hidden;
    padding: 0 13px;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.search-box {
    align-items: center;
    background: var(--surface-low);
    border: 1px solid var(--line-soft);
    border-radius: 999px;
    display: flex;
    gap: 8px;
    min-height: 40px;
    padding: 0 14px;
    position: relative;
    width: 300px;
}

.search-box span {
    color: var(--muted);
}

.search-box input {
    background: transparent;
    border: 0;
    color: var(--ink);
    font-size: 13px;
    outline: 0;
    width: 100%;
}

.live-search-panel {
    background: var(--surface);
    border: 1px solid var(--line-soft);
    border-radius: 14px;
    box-shadow: 0 18px 40px rgba(15, 23, 42, 0.14);
    padding: 10px;
    position: absolute;
    right: 0;
    top: calc(100% + 10px);
    width: min(520px, calc(100vw - 36px));
    z-index: 60;
}

.live-search-panel[hidden] {
    display: none;
}

.live-search-list {
    display: grid;
    gap: 8px;
}

.live-search-card {
    align-items: center;
    background: var(--surface-low);
    border: 1px solid transparent;
    border-radius: 12px;
    display: flex;
    gap: 12px;
    min-width: 0;
    padding: 11px;
}

.live-search-card:hover {
    background: var(--surface);
    border-color: var(--primary-tint);
}

.live-search-card-copy {
    display: block;
    min-width: 0;
}

.live-search-card-copy strong {
    color: var(--ink);
    display: block;
    font-size: 13px;
    font-weight: 600;
    line-height: 1.35;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.live-search-card-copy small {
    color: var(--muted);
    display: block;
    font-size: 11px;
    line-height: 1.4;
    margin-top: 3px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.live-search-empty {
    color: var(--muted);
    font-size: 12px;
    margin: 0;
    padding: 12px;
}

.user-chip {
    align-items: center;
    display: flex;
    gap: 10px;
}

.user-chip strong {
    color: var(--ink);
    display: block;
    font-size: 12px;
    font-weight: 600;
}

.user-chip small {
    color: var(--muted);
    display: block;
    font-size: 10px;
}

.avatar {
    align-items: center;
    background: var(--primary-soft);
    border: 1px solid var(--line-soft);
    border-radius: 999px;
    color: var(--primary);
    display: inline-flex;
    height: 36px;
    justify-content: center;
    width: 36px;
}

.main-content {
    padding: 30px 34px 52px;
}

.eyebrow {
    color: var(--primary);
    display: block;
    font-size: 11px;
    font-weight: 600;
    margin-bottom: 7px;
    text-transform: uppercase;
}

.dashboard-hero,
.course-hero {
    align-items: flex-end;
    display: flex;
    gap: 24px;
    justify-content: space-between;
    margin-bottom: 22px;
}

.hero-copy,
.course-hero-main {
    min-width: 0;
}

.dashboard-hero h2,
.course-hero h2,
.section-head h2,
.profile-context h2 {
    color: var(--ink);
    font-size: 28px;
    font-weight: 700;
    line-height: 1.2;
    margin: 0 0 8px;
}

.dashboard-hero p,
.course-hero p,
.profile-context p {
    color: var(--muted);
    font-size: 14px;
    line-height: 1.65;
    margin: 0;
    max-width: 760px;
}

.hero-actions,
.intro-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.primary-action,
.secondary-action,
.resource-toolbar button,
.resource-toolbar a,
.form-panel button {
    align-items: center;
    border-radius: 12px;
    cursor: pointer;
    display: inline-flex;
    font-size: 13px;
    font-weight: 500;
    gap: 8px;
    justify-content: center;
    min-height: 42px;
    padding: 0 18px;
}

.primary-action,
.resource-toolbar button,
.form-panel button {
    background: var(--primary);
    border: 1px solid var(--primary);
    color: #fff;
}

.primary-action:hover,
.resource-toolbar button:hover,
.form-panel button:hover {
    background: var(--primary-strong);
}

.secondary-action,
.resource-toolbar a {
    background: var(--surface);
    border: 1px solid var(--line-soft);
    color: var(--primary);
}

.overview-grid {
    display: grid;
    gap: 18px;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-bottom: 24px;
}

.overview-card {
    align-items: center;
    background: var(--surface);
    border: 1px solid var(--line-soft);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    display: flex;
    gap: 16px;
    min-height: 96px;
    padding: 18px;
}

.overview-icon,
.course-hero-icon,
.profile-icon {
    align-items: center;
    background: var(--primary-soft);
    border-radius: 12px;
    color: var(--primary);
    display: inline-flex;
    flex: 0 0 48px;
    height: 48px;
    justify-content: center;
    width: 48px;
}

.overview-icon.blue {
    background: var(--secondary-soft);
    color: var(--secondary);
}

.overview-icon.soft {
    background: var(--surface-mid);
    color: var(--muted);
}

.overview-card small,
.course-info-card dt,
.viewer-details dt {
    color: var(--muted);
    display: block;
    font-size: 11px;
    font-weight: 500;
    text-transform: uppercase;
}

.overview-card strong {
    color: var(--ink);
    display: block;
    font-size: 22px;
    font-weight: 700;
    line-height: 1.25;
}

.resource-toolbar {
    align-items: end;
    background: var(--surface);
    border: 1px solid var(--line-soft);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    display: flex;
    gap: 14px;
    margin-bottom: 22px;
    padding: 18px;
}

.resource-toolbar label {
    color: var(--muted);
    display: grid;
    flex: 1;
    font-size: 11px;
    font-weight: 500;
    gap: 7px;
    text-transform: uppercase;
}

select,
.form-panel input,
.form-panel select {
    background: var(--surface-low);
    border: 1px solid var(--line-soft);
    border-radius: 12px;
    color: var(--ink);
    min-height: 42px;
    outline: 0;
    padding: 0 13px;
}

select:focus,
.form-panel input:focus,
.form-panel select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 77, 39, 0.12);
}

.quick-grid {
    display: grid;
    gap: 14px;
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
    margin-bottom: 28px;
}

.quick-card {
    align-items: center;
    background: var(--surface);
    border: 1px solid var(--line-soft);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    display: flex;
    gap: 18px;
    justify-content: space-between;
    padding: 16px;
    transition: border 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.quick-card:hover,
.quick-card.active {
    border-color: var(--primary);
    box-shadow: 0 10px 24px rgba(0, 77, 39, 0.08);
    transform: translateY(-1px);
}

.quick-card span:first-child {
    color: var(--primary);
    display: block;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
}

.quick-card h3 {
    color: var(--ink);
    font-size: 15px;
    font-weight: 600;
    margin: 5px 0;
}

.quick-card p {
    color: var(--muted);
    font-size: 12px;
    margin: 0;
}

.quick-card > .material-symbols-outlined {
    color: var(--primary);
    font-size: 18px;
}

.course-browser,
.featured-strip,
.materials-panel,
.course-info-card,
.document-viewer,
.viewer-details,
.ai-assistant-card,
.chat-history-panel,
.chat-main-card,
.form-panel,
.profile-context,
.profile-hero-panel,
.profile-panel-card {
    background: var(--surface);
    border: 1px solid var(--line-soft);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.course-browser,
.featured-strip {
    margin-bottom: 28px;
    padding: 20px;
    scroll-margin-top: 92px;
}

.section-head {
    align-items: center;
    display: flex;
    gap: 18px;
    justify-content: space-between;
    margin-bottom: 18px;
}

.section-head h2 {
    font-size: 21px;
    margin: 0;
}

.panel-spaced {
    padding: 20px 20px 0;
}

.panel-tabs {
    align-items: center;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.panel-tabs a {
    background: var(--surface-low);
    border: 1px solid var(--line-soft);
    border-radius: 999px;
    color: var(--muted);
    font-size: 12px;
    font-weight: 500;
    min-height: 30px;
    padding: 7px 12px;
}

.panel-tabs a.active {
    background: var(--primary-soft);
    border-color: var(--primary-tint);
    color: var(--primary);
}

.course-card-grid {
    display: grid;
    gap: 18px;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.course-resource-card {
    background: var(--surface);
    border: 1px solid var(--line-soft);
    border-radius: var(--radius);
    display: flex;
    flex-direction: column;
    min-height: 340px;
    overflow: hidden;
    transition: border 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.course-resource-card:hover {
    border-color: var(--primary-tint);
    box-shadow: 0 12px 28px rgba(0, 77, 39, 0.08);
    transform: translateY(-1px);
}

.course-card-head {
    align-items: flex-start;
    background: var(--surface-low);
    border-bottom: 1px solid var(--line-soft);
    display: flex;
    gap: 18px;
    justify-content: space-between;
    padding: 20px;
}

.course-code {
    background: var(--surface);
    border: 1px solid var(--line-soft);
    border-radius: 999px;
    color: var(--primary);
    display: inline-flex;
    font-size: 11px;
    font-weight: 600;
    margin-bottom: 12px;
    padding: 5px 9px;
}

.course-card-head h3 {
    color: var(--ink);
    font-size: 18px;
    font-weight: 600;
    line-height: 1.35;
    margin: 0 0 6px;
}

.course-card-head p {
    color: var(--muted);
    font-size: 12px;
    margin: 0;
}

.course-icon {
    align-items: center;
    background: var(--primary-soft);
    border-radius: 12px;
    color: var(--primary);
    display: inline-flex;
    flex: 0 0 44px;
    height: 44px;
    justify-content: center;
    width: 44px;
}

.resource-preview-list {
    display: grid;
    gap: 10px;
    padding: 16px;
}

.resource-preview-item,
.resource-line-main {
    align-items: center;
    display: flex;
    gap: 12px;
    min-width: 0;
}

.resource-preview-item {
    background: var(--surface);
    border: 1px solid var(--line-soft);
    border-radius: 12px;
    padding: 12px;
}

.resource-preview-item:hover {
    border-color: var(--primary-tint);
}

.resource-preview-item strong,
.resource-line-main strong {
    color: var(--ink);
    display: block;
    font-size: 13px;
    font-weight: 600;
    line-height: 1.35;
}

.resource-preview-item small,
.resource-line-main small {
    color: var(--muted);
    display: block;
    font-size: 11px;
    margin-top: 3px;
}

.file-icon {
    align-items: center;
    border-radius: 11px;
    display: inline-flex;
    flex: 0 0 40px;
    height: 40px;
    justify-content: center;
    width: 40px;
}

.file-icon.pdf {
    background: var(--danger-soft);
    color: var(--danger);
}

.file-icon.ppt {
    background: var(--secondary-soft);
    color: var(--secondary);
}

.file-icon.doc {
    background: var(--primary-soft);
    color: var(--primary);
}

.course-card-foot {
    align-items: center;
    background: var(--surface-low);
    border-top: 1px solid var(--line-soft);
    display: flex;
    justify-content: space-between;
    margin-top: auto;
    padding: 14px 16px;
}

.course-card-foot span {
    color: var(--muted);
    font-size: 12px;
}

.course-card-foot a,
.row-actions a {
    align-items: center;
    color: var(--primary);
    display: inline-flex;
    font-size: 12px;
    font-weight: 600;
    gap: 5px;
}

.featured-grid {
    display: grid;
    gap: 14px;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.featured-card {
    align-items: center;
    background: var(--surface-low);
    border: 1px solid var(--line-soft);
    border-radius: 13px;
    display: flex;
    gap: 12px;
    padding: 14px;
}

.featured-card small {
    color: var(--muted);
    display: block;
    font-size: 11px;
}

.featured-card h3 {
    color: var(--ink);
    font-size: 14px;
    font-weight: 600;
    margin: 4px 0;
}

.featured-card p {
    color: var(--muted);
    font-size: 12px;
    margin: 0;
}

.course-hero {
    background: var(--surface);
    border: 1px solid var(--line-soft);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 22px;
}

.course-hero-main {
    align-items: center;
    display: flex;
    gap: 16px;
}

.course-detail-layout {
    align-items: start;
    display: grid;
    gap: 20px;
    grid-template-columns: minmax(0, 1fr) 320px;
}

.materials-panel {
    overflow: hidden;
}

.resource-list {
    display: grid;
    padding: 12px 20px 20px;
}

.resource-line {
    align-items: center;
    border-top: 1px solid var(--line-soft);
    display: grid;
    gap: 16px;
    grid-template-columns: minmax(280px, 1fr) 110px 100px 140px;
    padding: 15px 0;
}

.resource-line:first-child {
    border-top: 0;
}

.file-pill,
.need-pill,
.muted-pill,
.tool-chip {
    border-radius: 999px;
    display: inline-flex;
    font-size: 11px;
    font-weight: 500;
    justify-content: center;
    padding: 6px 10px;
}

.file-pill,
.tool-chip {
    background: var(--surface-mid);
    color: var(--muted);
}

.need-pill {
    background: var(--warning-soft);
    color: #7c5a00;
}

.muted-pill {
    background: var(--surface-low);
    color: var(--muted);
}

.row-actions {
    align-items: center;
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

.icon-action,
.tool-button {
    align-items: center;
    background: var(--surface-low);
    border: 1px solid var(--line-soft);
    border-radius: 10px;
    color: var(--primary);
    display: inline-flex;
    height: 36px;
    justify-content: center;
    width: 36px;
}

.course-info-card {
    padding: 20px;
    position: sticky;
    top: 96px;
}

.course-info-card h3 {
    color: var(--primary);
    font-size: 28px;
    margin: 0 0 18px;
}

.course-info-card dl,
.viewer-details dl {
    display: grid;
    gap: 14px;
    margin: 0 0 22px;
}

.course-info-card div,
.viewer-details dl div {
    border-top: 1px solid var(--line-soft);
    padding-top: 12px;
}

.course-info-card dd,
.viewer-details dd {
    color: var(--ink);
    font-size: 14px;
    font-weight: 500;
    margin: 4px 0 0;
}

.viewer-page {
    display: grid;
    gap: 18px;
}

.viewer-topline {
    align-items: center;
    display: grid;
    gap: 16px;
    grid-template-columns: auto minmax(0, 1fr) auto;
}

.viewer-title {
    min-width: 0;
    text-align: center;
}

.viewer-title h2 {
    color: var(--ink);
    font-size: 22px;
    font-weight: 700;
    line-height: 1.25;
    margin: 0;
}

.document-shell {
    display: grid;
    gap: 20px;
    grid-template-columns: minmax(0, 1fr) minmax(380px, 440px);
}

.document-viewer {
    overflow: hidden;
}

.viewer-toolbar {
    align-items: center;
    background: var(--surface);
    border-bottom: 1px solid var(--line-soft);
    display: flex;
    gap: 16px;
    justify-content: space-between;
    min-height: 54px;
    padding: 0 18px;
}

.toolbar-group {
    align-items: center;
    display: flex;
    gap: 10px;
    min-width: 0;
}

.toolbar-filename {
    color: var(--muted);
    font-size: 12px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.viewer-stage {
    background: var(--surface-low);
    min-height: 650px;
    padding: 18px;
}

.file-preview {
    background: var(--surface);
    border: 1px solid var(--line-soft);
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(18, 33, 24, 0.04);
    height: 650px;
    width: 100%;
}

.file-placeholder {
    align-items: center;
    background: var(--surface);
    border: 1px dashed var(--line);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 560px;
    padding: 34px;
    text-align: center;
}

.file-placeholder h2 {
    font-size: 22px;
    margin: 16px 0 6px;
}

.file-placeholder p {
    color: var(--muted);
    line-height: 1.6;
    margin: 0 0 18px;
    max-width: 420px;
}

.document-card-preview {
    background: var(--surface);
    border: 1px solid var(--line-soft);
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(18, 33, 24, 0.04);
    display: flex;
    flex-direction: column;
    margin: 0 auto;
    max-width: 880px;
    min-height: 560px;
    overflow: hidden;
    padding: 34px;
}

.slide-preview {
    aspect-ratio: 16 / 10;
}

.doc-preview {
    max-width: 720px;
}

.preview-page-head {
    align-items: flex-start;
    display: flex;
    gap: 24px;
    justify-content: space-between;
    margin-bottom: 22px;
}

.preview-page-head h2 {
    color: var(--ink);
    font-size: 24px;
    font-weight: 700;
    line-height: 1.25;
    margin: 0;
}

.preview-page-head img {
    height: auto;
    opacity: 0.45;
    width: 150px;
}

.preview-lead {
    background: var(--surface-low);
    border-left: 4px solid var(--primary);
    border-radius: 10px;
    color: var(--muted);
    font-size: 13px;
    line-height: 1.55;
    margin: 0 0 22px;
    padding: 14px 16px;
}

.preview-content-list {
    display: grid;
    gap: 12px;
}

.preview-point {
    align-items: flex-start;
    display: flex;
    gap: 10px;
}

.preview-point .material-symbols-outlined {
    color: var(--primary);
    flex: 0 0 22px;
    margin-top: 1px;
}

.preview-point p {
    color: var(--ink);
    font-size: 14px;
    line-height: 1.6;
    margin: 0;
}

.preview-page-foot {
    align-items: center;
    border-top: 1px solid var(--line-soft);
    color: var(--muted);
    display: flex;
    font-size: 11px;
    justify-content: space-between;
    margin-top: auto;
    padding-top: 18px;
}

.viewer-details {
    padding: 20px;
}

.resource-side-panel {
    align-self: start;
    display: grid;
    gap: 16px;
    min-width: 0;
    position: sticky;
    top: 82px;
}

.details-header {
    align-items: center;
    display: flex;
    gap: 12px;
    margin-bottom: 18px;
}

.details-header h3 {
    color: var(--ink);
    font-size: 18px;
    font-weight: 600;
    margin: 0;
}

.viewer-details > p {
    color: var(--muted);
    font-size: 13px;
    line-height: 1.6;
    margin: 0 0 18px;
}

.ai-assistant-card {
    display: flex;
    flex-direction: column;
    height: min(780px, calc(100vh - 96px));
    min-height: 620px;
    overflow: hidden;
}

.ai-head {
    align-items: start;
    background: var(--surface);
    border-bottom: 1px solid var(--line-soft);
    display: grid;
    gap: 10px;
    grid-template-columns: minmax(0, 1fr) auto;
    padding: 14px 16px;
}

.ai-head-actions {
    align-items: center;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: flex-end;
}

.ai-mini-action {
    align-items: center;
    background: var(--surface-low);
    border: 1px solid var(--line-soft);
    border-radius: 999px;
    color: var(--primary);
    display: inline-flex;
    font-size: 10px;
    font-weight: 600;
    min-height: 24px;
    padding: 0 9px;
    text-transform: uppercase;
}

.ai-mini-action:hover {
    background: var(--primary-soft);
    border-color: var(--primary-tint);
}

.ai-title-row {
    align-items: center;
    display: flex;
    gap: 10px;
    min-width: 0;
}

.ai-icon {
    align-items: center;
    background: var(--primary);
    border-radius: 10px;
    color: var(--primary);
    color: #fff;
    display: inline-flex;
    flex: 0 0 38px;
    height: 38px;
    justify-content: center;
    width: 38px;
}

.ai-head h3 {
    color: var(--ink);
    font-size: 15px;
    font-weight: 600;
    margin: 0;
}

.ai-status {
    align-items: center;
    background: var(--primary-soft);
    border: 1px solid var(--primary-tint);
    border-radius: 999px;
    color: var(--primary);
    display: inline-flex;
    flex: 0 0 auto;
    font-size: 10px;
    font-weight: 600;
    min-height: 24px;
    padding: 0 9px;
    text-transform: uppercase;
}

.ai-messages {
    background: var(--surface-low);
    display: flex;
    flex: 1;
    flex-direction: column;
    gap: 10px;
    min-height: 0;
    overflow-y: auto;
    padding: 14px;
    scrollbar-width: thin;
}

.ai-thread-strip {
    border-bottom: 1px solid var(--line-soft);
    display: flex;
    gap: 6px;
    overflow-x: auto;
    padding: 8px 10px;
    scrollbar-width: thin;
}

.ai-thread-strip[hidden] {
    display: none;
}

.ai-thread-strip a {
    background: var(--surface-low);
    border: 1px solid var(--line-soft);
    border-radius: 10px;
    display: grid;
    flex: 0 0 124px;
    gap: 2px;
    min-height: 40px;
    padding: 7px 9px;
}

.ai-thread-strip a.active {
    background: var(--primary-soft);
    border-color: var(--primary-tint);
}

.ai-thread-strip span,
.chat-session-item span,
.resource-mention-rail button span,
.mention-popover button span {
    color: var(--muted);
    font-size: 9px;
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
    text-transform: uppercase;
    white-space: nowrap;
}

.ai-thread-strip strong,
.chat-session-item strong,
.resource-mention-rail button strong,
.mention-popover button strong {
    color: var(--ink);
    font-size: 11px;
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ai-message {
    border-radius: 16px;
    font-size: 12.5px;
    line-height: 1.55;
    max-width: 92%;
    padding: 10px 12px;
    white-space: pre-wrap;
}

.ai-message.assistant {
    align-self: flex-start;
    background: var(--surface);
    border: 1px solid var(--line-soft);
    border-bottom-left-radius: 6px;
    box-shadow: 0 5px 14px rgba(18, 33, 24, 0.04);
    color: var(--ink);
}

.ai-message.user {
    align-self: flex-end;
    background: var(--primary);
    border-bottom-right-radius: 6px;
    color: #fff;
    max-width: 86%;
}

.ai-message.loading {
    color: var(--muted);
    font-style: italic;
}

.ai-suggestions {
    border-top: 1px solid var(--line-soft);
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
    padding: 10px 12px;
}

.ai-suggestions button {
    align-items: center;
    background: var(--surface);
    border: 1px solid var(--line-soft);
    border-radius: 10px;
    color: var(--primary);
    cursor: pointer;
    display: inline-flex;
    font-size: 10px;
    font-weight: 600;
    gap: 5px;
    justify-content: center;
    min-height: 34px;
    padding: 0 7px;
    transition: background 160ms ease, border-color 160ms ease, transform 160ms ease;
    white-space: nowrap;
}

.ai-suggestions button:hover {
    background: var(--primary-soft);
    border-color: var(--primary-tint);
    transform: translateY(-1px);
}

.ai-suggestions .material-symbols-outlined {
    font-size: 16px;
}

.ai-form {
    align-items: end;
    background: var(--surface);
    border-top: 1px solid var(--line-soft);
    display: grid;
    gap: 8px;
    grid-template-columns: minmax(0, 1fr) 40px;
    padding: 12px;
}

.ai-input-wrap {
    background: var(--surface-low);
    border: 1px solid var(--line-soft);
    border-radius: 14px;
    overflow: hidden;
    transition: border-color 160ms ease, box-shadow 160ms ease;
}

.ai-input-wrap:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 77, 39, 0.12);
}

.ai-form textarea {
    background: transparent;
    border: 0;
    color: var(--ink);
    min-height: 42px;
    outline: 0;
    padding: 10px 12px;
    resize: vertical;
    width: 100%;
}

.ai-form textarea:focus {
    box-shadow: none;
}

.ai-form button {
    align-items: center;
    background: var(--primary);
    border: 1px solid var(--primary);
    border-radius: 12px;
    color: #fff;
    cursor: pointer;
    display: inline-flex;
    height: 40px;
    justify-content: center;
    transition: background 160ms ease, opacity 160ms ease, transform 160ms ease;
    width: 40px;
}

.ai-form button:hover {
    background: var(--primary-strong);
    transform: translateY(-1px);
}

.ai-form button:disabled,
.ai-form textarea:disabled {
    cursor: wait;
    opacity: 0.6;
}

.chat-workspace {
    align-items: start;
    display: grid;
    gap: 16px;
    grid-template-columns: 300px minmax(0, 1fr);
}

.chat-history-panel {
    display: grid;
    gap: 14px;
    max-height: calc(100vh - 106px);
    overflow: hidden;
    padding: 16px;
    position: sticky;
    top: 82px;
}

.chat-history-head {
    align-items: center;
    display: flex;
    justify-content: space-between;
}

.chat-history-head h2 {
    color: var(--ink);
    font-size: 18px;
    margin: 0;
}

.chat-session-list {
    display: grid;
    gap: 8px;
    min-height: 0;
    overflow-y: auto;
    padding-right: 2px;
    scrollbar-width: thin;
}

.chat-session-item {
    background: var(--surface-low);
    border: 1px solid var(--line-soft);
    border-radius: 10px;
    display: grid;
    gap: 4px;
    min-height: 58px;
    padding: 10px;
}

.chat-session-item.active {
    background: var(--primary-soft);
    border-color: var(--primary-tint);
}

.chat-main-card.ai-assistant-card {
    height: min(760px, calc(100vh - 104px));
    min-height: 620px;
}

.resource-mention-rail {
    border-bottom: 1px solid var(--line-soft);
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding: 10px 12px;
    scrollbar-width: thin;
}

.resource-mention-rail button {
    background: var(--surface-low);
    border: 1px solid var(--line-soft);
    border-radius: 10px;
    cursor: pointer;
    display: grid;
    flex: 0 0 180px;
    gap: 3px;
    min-height: 50px;
    padding: 9px 10px;
    text-align: left;
}

.resource-mention-rail button:hover {
    background: var(--primary-soft);
    border-color: var(--primary-tint);
}

.selected-resource-pill {
    align-items: center;
    background: var(--primary-soft);
    border-bottom: 1px solid var(--line-soft);
    color: var(--primary);
    display: flex;
    font-size: 11px;
    font-weight: 600;
    gap: 8px;
    min-height: 34px;
    padding: 0 14px;
}

.selected-resource-pill[hidden] {
    display: none;
}

.general-limit-bar {
    align-items: center;
    background: var(--surface);
    border-bottom: 1px solid var(--line-soft);
    color: var(--muted);
    display: flex;
    font-size: 11px;
    gap: 8px;
    min-height: 34px;
    padding: 0 14px;
}

.general-limit-bar[hidden] {
    display: none;
}

.general-limit-bar .material-symbols-outlined {
    color: var(--primary);
    font-size: 16px;
}

.general-limit-bar strong {
    color: var(--primary);
}

.general-limit-bar.depleted {
    background: var(--warning-soft);
    color: #7c5a00;
}

.chat-file-card {
    align-items: center;
    background: var(--surface-low);
    border-bottom: 1px solid var(--line-soft);
    display: flex;
    gap: 6px;
    padding: 8px 10px;
}

.chat-file-card[hidden] {
    display: none;
}

.chat-file-main {
    align-items: center;
    background: var(--surface);
    border: 1px solid var(--line-soft);
    border-radius: 12px;
    display: flex;
    flex: 1;
    gap: 9px;
    min-height: 50px;
    min-width: 0;
    padding: 8px 9px;
    transition: border-color 160ms ease, background 160ms ease;
}

.chat-file-main .file-icon {
    border-radius: 9px;
    flex: 0 0 34px;
    height: 34px;
    width: 34px;
}

.chat-file-main:hover {
    background: #fbfffc;
    border-color: var(--primary-tint);
}

.chat-file-copy {
    display: grid;
    gap: 3px;
    min-width: 0;
}

.chat-file-copy strong {
    color: var(--ink);
    font-size: 12px;
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.chat-file-copy small {
    color: var(--muted);
    font-size: 10px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.chat-file-download {
    align-items: center;
    background: var(--surface);
    border: 1px solid var(--line-soft);
    border-radius: 11px;
    color: var(--primary);
    display: inline-flex;
    flex: 0 0 36px;
    height: 36px;
    justify-content: center;
    transition: background 160ms ease, border-color 160ms ease;
    width: 36px;
}

.chat-file-download:hover {
    background: var(--primary-soft);
    border-color: var(--primary-tint);
}

.mention-input-wrap {
    overflow: visible;
    position: relative;
}

.mention-popover {
    background: var(--surface);
    border: 1px solid var(--line-soft);
    border-radius: 12px;
    bottom: calc(100% + 8px);
    box-shadow: 0 14px 30px rgba(18, 33, 24, 0.12);
    display: grid;
    gap: 6px;
    left: 0;
    max-height: 250px;
    overflow-y: auto;
    padding: 8px;
    position: absolute;
    right: 0;
    z-index: 8;
}

.mention-popover[hidden] {
    display: none;
}

.mention-popover button {
    background: var(--surface-low);
    border: 1px solid var(--line-soft);
    border-radius: 9px;
    color: var(--ink);
    cursor: pointer;
    display: grid;
    gap: 3px;
    height: auto;
    justify-content: stretch;
    min-height: 46px;
    padding: 8px 10px;
    text-align: left;
    transform: none;
    width: 100%;
}

.mention-popover button:hover {
    background: var(--primary-soft);
    border-color: var(--primary-tint);
    transform: none;
}

.mention-popover button span,
.mention-popover button strong {
    min-width: 0;
}

.ai-form .mention-popover button {
    align-items: stretch;
    display: grid;
    gap: 3px;
    height: auto;
    justify-content: stretch;
    min-height: 46px;
    padding: 8px 10px;
    text-align: left;
    width: 100%;
}

.ai-form .mention-popover button:hover {
    transform: none;
}

.profile-layout {
    align-items: stretch;
    display: grid;
    gap: 20px;
    grid-template-columns: minmax(260px, 0.8fr) minmax(320px, 1fr);
    margin: 34px auto;
    max-width: 980px;
}

.profile-context,
.form-panel {
    padding: 24px;
}

.profile-icon {
    margin-bottom: 20px;
}

.profile-summary {
    background: var(--surface-low);
    border: 1px solid var(--line-soft);
    border-radius: 12px;
    display: grid;
    gap: 5px;
    margin-top: 22px;
    padding: 14px;
}

.profile-summary strong {
    color: var(--ink);
    font-size: 14px;
}

.profile-summary span {
    color: var(--muted);
    font-size: 12px;
}

.form-panel h2 {
    font-size: 22px;
    margin: 0 0 20px;
}

.form-panel form {
    display: grid;
    gap: 12px;
}

.form-panel label {
    color: var(--muted);
    font-size: 12px;
    font-weight: 500;
}

.clear-profile {
    margin-top: 14px;
}

.clear-profile button {
    background: var(--surface-low);
    border: 1px solid var(--line-soft);
    border-radius: 12px;
    border-color: var(--line-soft);
    color: var(--muted);
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    min-height: 40px;
    padding: 0 16px;
    width: 100%;
}

.form-panel-link {
    color: var(--primary);
    display: inline-flex;
    font-size: 13px;
    font-weight: 600;
    margin-top: 16px;
}

.profile-hero-panel {
    align-items: center;
    display: flex;
    gap: 20px;
    justify-content: space-between;
    margin-bottom: 24px;
    padding: 24px;
}

.profile-identity {
    align-items: center;
    display: flex;
    gap: 16px;
    min-width: 0;
}

.profile-avatar-large {
    align-items: center;
    background: var(--primary);
    border-radius: 18px;
    color: #fff;
    display: inline-flex;
    flex: 0 0 64px;
    font-size: 34px;
    height: 64px;
    justify-content: center;
    width: 64px;
}

.profile-identity h2 {
    color: var(--ink);
    font-size: 28px;
    line-height: 1.2;
    margin: 0 0 6px;
}

.profile-identity p {
    color: var(--muted);
    font-size: 14px;
    line-height: 1.5;
    margin: 0;
}

.profile-dashboard-grid {
    display: grid;
    gap: 20px;
    grid-template-columns: minmax(280px, 0.85fr) minmax(360px, 1.15fr);
}

.profile-panel-card {
    padding: 22px;
}

.section-head.compact {
    margin-bottom: 16px;
}

.section-head.compact h2 {
    font-size: 21px;
}

.profile-detail-list {
    display: grid;
    gap: 10px;
}

.profile-detail-list div {
    align-items: center;
    background: var(--surface-low);
    border: 1px solid var(--line-soft);
    border-radius: 12px;
    display: flex;
    gap: 14px;
    justify-content: space-between;
    min-height: 48px;
    padding: 11px 13px;
}

.profile-detail-list span {
    color: var(--muted);
    font-size: 12px;
}

.profile-detail-list strong {
    color: var(--ink);
    font-size: 13px;
    text-align: right;
}

.profile-resource-list {
    display: grid;
    gap: 10px;
}

.mini-link {
    color: var(--primary);
    font-size: 12px;
    font-weight: 600;
}

.admin-body {
    background: #f5f7f6;
    min-height: 100vh;
}

.admin-sidebar {
    background: #102018;
    bottom: 0;
    color: #ecf5ef;
    display: flex;
    flex-direction: column;
    left: 0;
    padding: 20px 14px;
    position: fixed;
    top: 0;
    width: 260px;
    z-index: 30;
}

.admin-brand {
    align-items: center;
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-bottom: 26px;
    padding: 4px 0;
}

.admin-brand img {
    display: block;
    flex: 0 0 auto;
    height: auto;
    max-width: 178px;
    width: 100%;
}

.admin-brand strong,
.admin-brand small {
    display: block;
}

.admin-brand strong {
    font-size: 15px;
}

.admin-brand small {
    color: rgba(236, 245, 239, 0.68);
    font-size: 11px;
    margin-top: 2px;
}

.admin-nav {
    display: grid;
    gap: 6px;
}

.admin-nav a,
.admin-sidebar-footer a {
    align-items: center;
    border-radius: 10px;
    color: rgba(236, 245, 239, 0.74);
    display: flex;
    font-size: 13px;
    font-weight: 500;
    gap: 10px;
    min-height: 42px;
    padding: 0 12px;
}

.admin-nav a:hover,
.admin-nav a.active,
.admin-sidebar-footer a:hover {
    background: rgba(255, 255, 255, 0.09);
    color: #fff;
}

.admin-sidebar-footer {
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    display: grid;
    gap: 4px;
    margin-top: auto;
    padding-top: 14px;
}

.admin-main {
    margin-left: 260px;
    min-height: 100vh;
    padding: 28px;
}

.admin-page-shell {
    margin: 0 auto;
    max-width: 1180px;
    width: 100%;
}

.admin-topbar {
    align-items: center;
    display: flex;
    justify-content: space-between;
    margin-bottom: 24px;
}

.admin-topbar h1 {
    color: var(--ink);
    font-size: 30px;
    line-height: 1.2;
    margin: 4px 0 0;
}

.admin-user-chip {
    align-items: center;
    background: var(--surface);
    border: 1px solid var(--line-soft);
    border-radius: 999px;
    color: var(--muted);
    display: inline-flex;
    font-size: 13px;
    gap: 8px;
    min-height: 40px;
    padding: 0 14px;
}

.teacher-body .admin-sidebar {
    background: transparent;
    border-right: 1px solid var(--line-soft);
    color: var(--ink);
}

.teacher-body .admin-brand {
    justify-content: center;
    margin-bottom: 18px;
    padding: 4px 0;
}

.teacher-body .admin-brand img {
    width: 204px;
}

.teacher-profile-card {
    align-items: center;
    background: var(--surface);
    border: 1px solid var(--line-soft);
    border-radius: 14px;
    box-shadow: var(--shadow);
    display: flex;
    gap: 11px;
    margin-bottom: 18px;
    padding: 12px;
}

.teacher-profile-avatar {
    align-items: center;
    background: var(--primary-soft);
    border-radius: 12px;
    color: var(--primary);
    display: inline-flex;
    flex: 0 0 42px;
    height: 42px;
    justify-content: center;
    width: 42px;
}

.teacher-profile-card strong,
.teacher-profile-card small {
    display: block;
}

.teacher-profile-card strong {
    color: var(--ink);
    font-size: 13px;
    font-weight: 700;
    line-height: 1.3;
}

.teacher-profile-card small {
    color: var(--muted);
    font-size: 10px;
    line-height: 1.45;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.teacher-body .admin-nav a,
.teacher-body .admin-sidebar-footer a {
    color: var(--muted);
}

.teacher-body .admin-nav a:hover,
.teacher-body .admin-nav a.active,
.teacher-body .admin-sidebar-footer a:hover {
    background: var(--surface);
    color: var(--primary);
}

.teacher-body .admin-nav a.active {
    border: 1px solid var(--line-soft);
    box-shadow: var(--shadow);
}

.teacher-body .admin-sidebar-footer {
    border-top-color: var(--line-soft);
}

.admin-messages {
    display: grid;
    gap: 8px;
    margin-bottom: 18px;
}

.admin-messages p {
    background: var(--primary-soft);
    border: 1px solid var(--primary-tint);
    border-radius: 12px;
    color: var(--primary);
    font-size: 13px;
    margin: 0;
    padding: 11px 13px;
}

.admin-messages p.error,
.admin-messages p.warning {
    background: var(--danger-soft);
    border-color: rgba(186, 26, 26, 0.18);
    color: var(--danger);
}

.admin-metric-grid {
    display: grid;
    gap: 16px;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-bottom: 20px;
}

.admin-metric-card,
.admin-panel {
    background: var(--surface);
    border: 1px solid var(--line-soft);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.admin-metric-card {
    align-items: center;
    display: flex;
    gap: 14px;
    min-height: 96px;
    padding: 18px;
}

.admin-metric-card > .material-symbols-outlined {
    align-items: center;
    background: var(--primary-soft);
    border-radius: 14px;
    color: var(--primary);
    display: inline-flex;
    flex: 0 0 46px;
    height: 46px;
    justify-content: center;
    width: 46px;
}

.admin-metric-card small {
    color: var(--muted);
    display: block;
    font-size: 11px;
    text-transform: uppercase;
}

.admin-metric-card strong {
    color: var(--ink);
    display: block;
    font-size: 24px;
    margin-top: 3px;
}

.admin-dashboard-grid {
    display: grid;
    gap: 20px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.teacher-dashboard-lower {
    margin-top: 20px;
}

.teacher-permission-note {
    background: var(--warning-soft);
    border: 1px solid rgba(135, 97, 0, 0.16);
    border-radius: 10px;
    color: #6f5300;
    font-size: 12px;
    line-height: 1.5;
    margin: 0;
    padding: 11px 12px;
}

.admin-dashboard-grid .wide {
    grid-column: 1 / -1;
}

.admin-panel {
    padding: 20px;
}

.admin-panel-head {
    align-items: center;
    display: flex;
    gap: 16px;
    justify-content: space-between;
    margin-bottom: 16px;
}

.admin-panel-head h2 {
    color: var(--ink);
    font-size: 21px;
    line-height: 1.25;
    margin: 2px 0 0;
}

.admin-panel-head a,
.admin-primary-link {
    align-items: center;
    background: var(--surface-low);
    border: 1px solid var(--line-soft);
    border-radius: 10px;
    color: var(--primary);
    display: inline-flex;
    font-size: 12px;
    font-weight: 600;
    gap: 6px;
    min-height: 36px;
    padding: 0 12px;
}

.admin-primary-link {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.admin-list-stack {
    display: grid;
    gap: 10px;
}

.admin-list-item {
    align-items: center;
    background: var(--surface-low);
    border: 1px solid transparent;
    border-radius: 12px;
    display: flex;
    gap: 12px;
    padding: 12px;
}

.admin-list-item:hover {
    background: var(--surface);
    border-color: var(--primary-tint);
}

.admin-list-item > .material-symbols-outlined {
    color: var(--primary);
}

.admin-list-item strong,
.admin-list-item small {
    display: block;
}

.admin-list-item strong {
    color: var(--ink);
    font-size: 13px;
}

.admin-list-item small {
    color: var(--muted);
    font-size: 11px;
    margin-top: 3px;
}

.admin-search-form {
    align-items: center;
    background: var(--surface-low);
    border: 1px solid var(--line-soft);
    border-radius: 12px;
    display: flex;
    gap: 10px;
    margin-bottom: 16px;
    padding: 10px;
}

.admin-search-form input {
    background: transparent;
    border: 0;
    color: var(--ink);
    flex: 1;
    min-width: 0;
    outline: 0;
}

.admin-search-form button,
.admin-form-actions button,
.admin-login-card button {
    align-items: center;
    background: var(--primary);
    border: 1px solid var(--primary);
    border-radius: 10px;
    color: #fff;
    cursor: pointer;
    display: inline-flex;
    font-size: 13px;
    font-weight: 600;
    gap: 8px;
    justify-content: center;
    min-height: 40px;
    padding: 0 16px;
}

.admin-table-wrap {
    overflow-x: auto;
}

.admin-table {
    border-collapse: collapse;
    min-width: 760px;
    width: 100%;
}

.admin-table th,
.admin-table td {
    border-bottom: 1px solid var(--line-soft);
    color: var(--ink);
    font-size: 12px;
    padding: 13px 10px;
    text-align: left;
    vertical-align: middle;
}

.admin-table th {
    color: var(--muted);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
}

.admin-row-actions {
    align-items: center;
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}

.admin-row-actions a,
.admin-row-actions button {
    align-items: center;
    background: var(--surface-low);
    border: 1px solid var(--line-soft);
    border-radius: 8px;
    color: var(--primary);
    cursor: pointer;
    display: inline-flex;
    font-size: 11px;
    font-weight: 600;
    gap: 5px;
    min-height: 30px;
    padding: 0 10px;
}

.admin-row-actions .material-symbols-outlined {
    font-size: 16px;
}

.admin-row-actions button {
    color: var(--danger);
}

.admin-click-row {
    cursor: pointer;
}

.admin-click-row:hover td,
.admin-click-row:focus td {
    background: var(--surface-low);
}

.admin-click-card {
    cursor: pointer;
}

.admin-click-card:focus,
.admin-click-card:hover {
    border-color: var(--primary-tint);
    box-shadow: 0 12px 28px rgba(0, 77, 39, 0.08);
    transform: translateY(-1px);
}

.admin-card-grid,
.admin-resource-card-grid {
    display: grid;
    gap: 14px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.admin-card-grid.compact {
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}

.admin-course-card,
.admin-user-card,
.admin-teacher-card,
.admin-resource-card {
    background: var(--surface);
    border: 1px solid var(--line-soft);
    border-radius: 14px;
    box-shadow: var(--shadow);
    display: grid;
    gap: 12px;
    min-width: 0;
    padding: 16px;
    transition: border 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.admin-course-card-head,
.admin-resource-card > div:first-child {
    align-items: center;
    display: flex;
    gap: 8px;
    justify-content: space-between;
}

.admin-code-pill {
    align-items: center;
    background: var(--surface-low);
    border: 1px solid var(--line-soft);
    border-radius: 999px;
    color: var(--primary);
    display: inline-flex;
    font-size: 11px;
    font-weight: 700;
    min-height: 28px;
    padding: 0 10px;
}

.admin-course-card h3,
.admin-user-card h3,
.admin-teacher-card h3,
.admin-resource-card h4 {
    color: var(--ink);
    font-size: 18px;
    line-height: 1.3;
    margin: 0;
}

.admin-resource-card h4 {
    font-size: 15px;
}

.admin-course-card p,
.admin-user-card p,
.admin-teacher-card p,
.admin-resource-card p {
    color: var(--muted);
    display: -webkit-box;
    font-size: 12px;
    line-height: 1.6;
    margin: 0;
    overflow: hidden;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
}

.admin-resource-card small {
    color: var(--muted);
    font-size: 11px;
    line-height: 1.5;
}

.admin-card-facts {
    display: grid;
    gap: 8px;
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.admin-card-facts span {
    background: var(--surface-low);
    border: 1px solid var(--line-soft);
    border-radius: 10px;
    color: var(--muted);
    display: grid;
    font-size: 10px;
    gap: 2px;
    min-height: 50px;
    padding: 9px;
}

.admin-card-facts strong {
    color: var(--ink);
    font-size: 12px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.admin-card-actions {
    align-items: center;
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}

.admin-card-actions a {
    align-items: center;
    background: var(--surface-low);
    border: 1px solid var(--line-soft);
    border-radius: 9px;
    color: var(--primary);
    display: inline-flex;
    font-size: 11px;
    font-weight: 700;
    gap: 5px;
    min-height: 32px;
    padding: 0 10px;
}

.admin-card-actions form {
    margin: 0;
}

.admin-inline-delete {
    align-items: center;
    background: var(--danger-soft);
    border: 1px solid rgba(186, 26, 26, 0.18);
    border-radius: 9px;
    color: var(--danger);
    cursor: pointer;
    display: inline-flex;
    font-size: 11px;
    font-weight: 700;
    min-height: 32px;
    padding: 0 10px;
}

.admin-card-actions .material-symbols-outlined {
    font-size: 16px;
}

.admin-resource-groups {
    display: grid;
    gap: 18px;
}

.admin-resource-group {
    background: var(--surface-low);
    border: 1px solid var(--line-soft);
    border-radius: 16px;
    padding: 14px;
}

.admin-resource-group-head {
    align-items: center;
    display: flex;
    gap: 12px;
    margin-bottom: 12px;
}

.admin-resource-group-head > .material-symbols-outlined {
    align-items: center;
    background: var(--primary-soft);
    border-radius: 12px;
    color: var(--primary);
    display: inline-flex;
    flex: 0 0 42px;
    height: 42px;
    justify-content: center;
    width: 42px;
}

.admin-resource-group-head h3 {
    color: var(--ink);
    font-size: 17px;
    margin: 0;
}

.admin-resource-group-head p {
    color: var(--muted);
    font-size: 11px;
    margin: 2px 0 0;
}

.admin-resource-semesters {
    display: grid;
    gap: 14px;
}

.admin-resource-semester {
    background: var(--surface);
    border: 1px solid var(--line-soft);
    border-radius: 14px;
    padding: 14px;
}

.admin-resource-semester-head {
    align-items: center;
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 12px;
}

.admin-resource-semester-head h4 {
    color: var(--ink);
    font-size: 15px;
    margin: 2px 0 0;
}

.admin-resource-semester-head > span {
    align-items: center;
    background: var(--surface-low);
    border: 1px solid var(--line-soft);
    border-radius: 999px;
    color: var(--muted);
    display: inline-flex;
    flex: 0 0 auto;
    font-size: 11px;
    font-weight: 700;
    min-height: 30px;
    padding: 0 10px;
}

.admin-form-layout {
    max-width: 920px;
}

.admin-form-layout.centered {
    margin-left: auto;
    margin-right: auto;
    max-width: 980px;
}

.admin-form {
    display: grid;
    gap: 14px;
}

.admin-form label,
.admin-login-card label {
    color: var(--muted);
    display: grid;
    font-size: 12px;
    font-weight: 600;
    gap: 7px;
}

.admin-form-field {
    color: var(--muted);
    display: grid;
    font-size: 12px;
    font-weight: 600;
    gap: 8px;
}

.admin-checkbox-list {
    background: var(--surface-low);
    border: 1px solid var(--line-soft);
    border-radius: 12px;
    max-height: 260px;
    overflow: auto;
    padding: 8px;
}

.admin-checkbox-list > div {
    display: grid;
    gap: 6px;
}

.admin-checkbox-list label {
    align-items: center;
    background: var(--surface);
    border: 1px solid var(--line-soft);
    border-radius: 10px;
    color: var(--ink);
    display: flex;
    font-size: 12px;
    font-weight: 500;
    gap: 8px;
    padding: 9px 10px;
}

.admin-checkbox-list input[type="checkbox"] {
    height: 16px;
    min-height: 0;
    width: 16px;
}

.admin-form input,
.admin-form select,
.admin-form textarea,
.admin-login-card input {
    background: var(--surface-low);
    border: 1px solid var(--line-soft);
    border-radius: 10px;
    color: var(--ink);
    min-height: 42px;
    outline: 0;
    padding: 9px 12px;
    width: 100%;
}

.admin-form textarea {
    min-height: 110px;
    resize: vertical;
}

.admin-form input[type="checkbox"] {
    min-height: 18px;
    width: 18px;
}

.admin-form label:has(input[type="checkbox"]) {
    align-items: center;
    display: flex;
}

.admin-form-actions {
    align-items: center;
    display: flex;
    gap: 10px;
    margin-top: 8px;
}

.admin-form-actions a {
    color: var(--muted);
    font-size: 13px;
    font-weight: 600;
}

.admin-detail-page {
    display: grid;
    gap: 20px;
    margin: 0 auto;
    max-width: 1120px;
    width: 100%;
}

.admin-detail-hero {
    align-items: center;
    background: linear-gradient(135deg, #ffffff 0%, #f1f8f3 100%);
    border: 1px solid var(--line-soft);
    border-radius: 18px;
    box-shadow: var(--shadow);
    display: flex;
    gap: 18px;
    justify-content: space-between;
    min-height: 144px;
    padding: 24px;
}

.admin-detail-identity {
    align-items: center;
    display: flex;
    gap: 16px;
    min-width: 0;
}

.admin-detail-icon {
    align-items: center;
    background: var(--primary);
    border-radius: 18px;
    color: #fff;
    display: inline-flex;
    flex: 0 0 64px;
    font-size: 34px;
    height: 64px;
    justify-content: center;
    width: 64px;
}

.admin-detail-identity h2 {
    color: var(--ink);
    font-size: 28px;
    line-height: 1.2;
    margin: 4px 0 6px;
}

.admin-detail-identity p {
    color: var(--muted);
    font-size: 13px;
    line-height: 1.55;
    margin: 0;
}

.admin-detail-hero-actions {
    align-items: center;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: flex-end;
}

.admin-status-badge {
    align-items: center;
    border-radius: 999px;
    display: inline-flex;
    font-size: 12px;
    font-weight: 700;
    min-height: 34px;
    padding: 0 12px;
}

.admin-status-badge.success {
    background: var(--primary-soft);
    color: var(--primary);
}

.admin-status-badge.muted {
    background: var(--surface-mid);
    color: var(--muted);
}

.admin-ghost-link {
    align-items: center;
    background: var(--surface);
    border: 1px solid var(--line-soft);
    border-radius: 10px;
    color: var(--primary);
    display: inline-flex;
    font-size: 12px;
    font-weight: 600;
    gap: 6px;
    min-height: 36px;
    padding: 0 12px;
}

.admin-detail-layout {
    display: grid;
    gap: 20px;
    grid-template-columns: minmax(0, 1fr) 300px;
}

.admin-detail-actions {
    align-items: center;
    display: flex;
    gap: 10px;
}

.admin-detail-groups {
    display: grid;
    gap: 18px;
}

.admin-related-section {
    border-top: 1px solid var(--line-soft);
    display: grid;
    gap: 14px;
    margin-top: 20px;
    padding-top: 20px;
}

.admin-related-head {
    align-items: center;
    display: flex;
    justify-content: space-between;
}

.admin-related-head h3 {
    color: var(--ink);
    font-size: 20px;
    margin: 2px 0 0;
}

.admin-filter-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.admin-filter-pills a {
    align-items: center;
    background: var(--surface-low);
    border: 1px solid var(--line-soft);
    border-radius: 999px;
    color: var(--muted);
    display: inline-flex;
    font-size: 12px;
    font-weight: 700;
    gap: 7px;
    min-height: 34px;
    padding: 0 12px;
}

.admin-filter-pills a.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.admin-filter-pills span {
    align-items: center;
    background: rgba(255, 255, 255, 0.24);
    border-radius: 999px;
    display: inline-flex;
    font-size: 10px;
    height: 20px;
    justify-content: center;
    min-width: 20px;
    padding: 0 6px;
}

.teacher-chat-filters {
    margin: 16px 0 18px;
}

.teacher-chat-list {
    display: grid;
    gap: 12px;
}

.teacher-chat-card {
    align-items: center;
    background: var(--surface);
    border: 1px solid var(--line-soft);
    border-radius: 14px;
    box-shadow: var(--shadow);
    cursor: pointer;
    display: grid;
    gap: 16px;
    grid-template-columns: minmax(0, 1fr) auto;
    padding: 16px;
    transition: border 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.teacher-chat-card:hover,
.teacher-chat-card:focus-visible {
    border-color: var(--primary-tint);
    box-shadow: 0 12px 28px rgba(0, 77, 39, 0.08);
    outline: 0;
    transform: translateY(-1px);
}

.teacher-chat-card-main {
    align-items: center;
    display: flex;
    gap: 14px;
    min-width: 0;
}

.teacher-chat-card-main .admin-detail-icon {
    border-radius: 14px;
    flex-basis: 48px;
    font-size: 24px;
    height: 48px;
    width: 48px;
}

.teacher-chat-card h3 {
    color: var(--ink);
    font-size: 17px;
    line-height: 1.3;
    margin: 0 0 5px;
}

.teacher-chat-card p {
    color: var(--muted);
    font-size: 12px;
    line-height: 1.5;
    margin: 0;
}

.teacher-chat-card-meta {
    align-items: flex-end;
    color: var(--muted);
    display: grid;
    font-size: 11px;
    gap: 7px;
    justify-items: end;
}

.teacher-chat-card-meta span,
.teacher-chat-card-meta a {
    white-space: nowrap;
}

.teacher-chat-card-meta strong {
    color: var(--primary);
    font-size: 15px;
    margin-right: 4px;
}

.teacher-chat-card-meta a {
    align-items: center;
    color: var(--primary);
    display: inline-flex;
    font-size: 12px;
    font-weight: 700;
    gap: 4px;
}

.teacher-assistant-workspace {
    align-items: start;
    display: grid;
    gap: 18px;
    grid-template-columns: 320px minmax(0, 1fr);
}

.teacher-assistant-side {
    display: grid;
    gap: 16px;
    position: sticky;
    top: 24px;
}

.teacher-context-panel,
.teacher-history-panel {
    display: grid;
    gap: 14px;
}

.teacher-context-panel label {
    color: var(--muted);
    display: grid;
    font-size: 11px;
    font-weight: 700;
    gap: 7px;
    text-transform: uppercase;
}

.teacher-context-panel p {
    color: var(--muted);
    font-size: 12px;
    line-height: 1.6;
    margin: 0;
}

.teacher-history-panel .admin-list-stack {
    max-height: 360px;
    overflow-y: auto;
    padding-right: 2px;
    scrollbar-width: thin;
}

.admin-list-item.active {
    background: var(--primary-soft);
    border-color: var(--primary-tint);
}

.teacher-assistant-chat.ai-assistant-card {
    height: min(780px, calc(100vh - 116px));
    min-height: 640px;
}

.teacher-prompt-grid {
    background: var(--surface-low);
    border-bottom: 1px solid var(--line-soft);
    display: grid;
    gap: 8px;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    padding: 12px;
}

.teacher-prompt-grid button {
    align-items: center;
    background: var(--surface);
    border: 1px solid var(--line-soft);
    border-radius: 11px;
    color: var(--primary);
    cursor: pointer;
    display: inline-flex;
    font-size: 11px;
    font-weight: 700;
    gap: 6px;
    justify-content: center;
    min-height: 38px;
    padding: 0 8px;
    transition: background 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.teacher-prompt-grid button:hover {
    background: var(--primary-soft);
    border-color: var(--primary-tint);
    transform: translateY(-1px);
}

.teacher-prompt-grid .material-symbols-outlined {
    font-size: 17px;
}

.admin-detail-group {
    border: 1px solid var(--line-soft);
    border-radius: 14px;
    overflow: hidden;
}

.admin-detail-group h3 {
    background: var(--surface-low);
    border-bottom: 1px solid var(--line-soft);
    color: var(--ink);
    font-size: 15px;
    margin: 0;
    padding: 13px 16px;
}

.admin-detail-group dl {
    display: grid;
    gap: 0;
    margin: 0;
}

.admin-detail-group.summary dl {
    grid-template-columns: 1fr;
}

.admin-detail-group.compact dl {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.admin-detail-group div {
    border-bottom: 1px solid var(--line-soft);
    display: grid;
    gap: 5px;
    min-height: 62px;
    padding: 13px 16px;
}

.admin-detail-group.compact div:nth-child(odd) {
    border-right: 1px solid var(--line-soft);
}

.admin-detail-group div:last-child,
.admin-detail-group.compact div:nth-last-child(2):nth-child(odd) {
    border-bottom: 0;
}

.admin-detail-group dt {
    color: var(--muted);
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
}

.admin-detail-group dd {
    color: var(--ink);
    font-size: 14px;
    font-weight: 600;
    line-height: 1.55;
    margin: 0;
    overflow-wrap: anywhere;
}

.admin-detail-group.summary dd {
    font-size: 15px;
    font-weight: 500;
}

.admin-detail-group dd.success,
.admin-detail-group dd.muted {
    align-items: center;
    border-radius: 999px;
    display: inline-flex;
    font-size: 12px;
    min-height: 28px;
    padding: 0 10px;
}

.admin-detail-group dd.success {
    background: var(--primary-soft);
    color: var(--primary);
}

.admin-detail-group dd.muted {
    background: var(--surface-mid);
    color: var(--muted);
}

.admin-detail-side {
    display: grid;
    gap: 14px;
}

.admin-action-panel {
    align-self: start;
}

.admin-action-panel > .material-symbols-outlined {
    color: var(--primary);
}

.admin-action-panel h3,
.admin-danger-panel h3 {
    color: var(--ink);
    font-size: 17px;
    margin: 10px 0 8px;
}

.admin-action-panel p,
.admin-danger-panel p {
    color: var(--muted);
    font-size: 12px;
    line-height: 1.55;
    margin: 0 0 14px;
}

.admin-action-panel .admin-primary-link {
    justify-content: center;
    width: 100%;
}

.admin-danger-panel {
    align-self: start;
    border-color: rgba(186, 26, 26, 0.18);
}

.admin-danger-panel > .material-symbols-outlined {
    color: var(--danger);
}

.admin-danger-panel button {
    background: var(--danger);
    border: 1px solid var(--danger);
    border-radius: 10px;
    color: #fff;
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    min-height: 38px;
    padding: 0 14px;
    width: 100%;
}

.admin-chat-layout {
    display: grid;
    gap: 20px;
    grid-template-columns: 340px minmax(0, 1fr);
}

.admin-message-thread {
    display: grid;
    gap: 12px;
}

.admin-chat-message {
    background: var(--surface-low);
    border: 1px solid var(--line-soft);
    border-radius: 12px;
    padding: 13px;
}

.admin-chat-message.user {
    border-color: var(--secondary-soft);
}

.admin-chat-message.assistant {
    border-color: var(--primary-soft);
}

.admin-chat-message span {
    color: var(--muted);
    display: block;
    font-size: 11px;
    font-weight: 700;
    margin-bottom: 6px;
    text-transform: uppercase;
}

.admin-chat-message p {
    color: var(--ink);
    font-size: 13px;
    line-height: 1.6;
    margin: 0;
}

.admin-chat-message small {
    color: var(--muted);
    display: block;
    font-size: 11px;
    margin-top: 10px;
}

.admin-login-body {
    align-items: center;
    background: linear-gradient(135deg, #102018 0%, #214d38 100%);
    display: flex;
    justify-content: center;
    min-height: 100vh;
    padding: 22px;
}

.admin-login-card {
    background: var(--surface);
    border-radius: 18px;
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.18);
    max-width: 430px;
    padding: 28px;
    text-align: center;
    width: 100%;
}

.admin-login-card img {
    display: block;
    height: auto;
    margin: 0 auto 18px;
    max-width: 100%;
    width: 240px;
}

.admin-login-card h1 {
    color: var(--ink);
    font-size: 28px;
    margin: 4px 0 8px;
}

.admin-login-card p {
    color: var(--muted);
    font-size: 13px;
    line-height: 1.6;
    margin: 0 0 18px;
}

.admin-login-card form {
    display: grid;
    gap: 12px;
    text-align: left;
}

.empty-state {
    color: var(--muted);
    padding: 18px;
}

.empty-state.compact {
    padding: 8px;
}

/* Compact density: tuned to feel close to an 80-85% browser zoom without scaling blur. */
.material-symbols-outlined {
    font-size: 18px;
}

.sidebar {
    padding: 18px 14px;
}

.brand-row {
    margin-bottom: 26px;
}

.brand .brand-full {
    max-width: 156px;
}

.sidebar-toggle {
    height: 34px;
    width: 34px;
}

.side-nav a {
    font-size: 12.5px;
    gap: 10px;
    min-height: 38px;
    padding: 0 10px;
}

.sidebar-footer {
    bottom: 18px;
    left: 14px;
    right: 14px;
}

.topbar {
    min-height: 58px;
    padding: 0 24px;
}

.breadcrumbs {
    font-size: 11px;
}

.top-actions {
    gap: 10px;
}

.session-pill {
    font-size: 11px;
    min-height: 28px;
    padding: 0 11px;
}

.search-box {
    min-height: 34px;
    padding: 0 12px;
    width: 270px;
}

.search-box input {
    font-size: 12px;
}

.user-chip strong {
    font-size: 11px;
}

.user-chip small {
    font-size: 9px;
}

.avatar {
    height: 32px;
    width: 32px;
}

.main-content {
    padding: 22px 26px 42px;
}

.eyebrow {
    font-size: 10px;
    margin-bottom: 5px;
}

.dashboard-hero,
.course-hero {
    gap: 18px;
    margin-bottom: 18px;
}

.dashboard-hero h2,
.course-hero h2,
.section-head h2,
.profile-context h2 {
    font-size: 23px;
    margin-bottom: 6px;
}

.dashboard-hero p,
.course-hero p,
.profile-context p {
    font-size: 12.5px;
    line-height: 1.55;
}

.primary-action,
.secondary-action,
.resource-toolbar button,
.resource-toolbar a,
.form-panel button {
    border-radius: 10px;
    font-size: 12px;
    min-height: 36px;
    padding: 0 14px;
}

.overview-grid,
.course-card-grid,
.featured-grid {
    gap: 14px;
}

.overview-card {
    gap: 12px;
    min-height: 78px;
    padding: 14px;
}

.overview-icon,
.course-hero-icon,
.profile-icon {
    flex-basis: 40px;
    height: 40px;
    width: 40px;
}

.overview-card small,
.course-info-card dt,
.viewer-details dt {
    font-size: 10px;
}

.overview-card strong {
    font-size: 18px;
}

.resource-toolbar {
    gap: 12px;
    margin-bottom: 18px;
    padding: 14px;
}

.resource-toolbar label {
    font-size: 10px;
    gap: 6px;
}

select,
.form-panel input,
.form-panel select {
    border-radius: 10px;
    min-height: 36px;
    padding: 0 11px;
}

.quick-grid {
    gap: 12px;
    margin-bottom: 22px;
}

.quick-card {
    gap: 14px;
    padding: 13px;
}

.quick-card span:first-child {
    font-size: 10px;
}

.quick-card h3 {
    font-size: 13px;
}

.quick-card p {
    font-size: 11px;
}

.course-browser,
.featured-strip {
    margin-bottom: 22px;
    padding: 16px;
}

.section-head {
    margin-bottom: 14px;
}

.section-head h2 {
    font-size: 18px;
}

.panel-spaced {
    padding: 16px 16px 0;
}

.panel-tabs a {
    font-size: 11px;
    min-height: 26px;
    padding: 5px 10px;
}

.course-resource-card {
    min-height: 290px;
}

.course-card-head {
    padding: 16px;
}

.course-code {
    font-size: 10px;
    margin-bottom: 9px;
    padding: 4px 8px;
}

.course-card-head h3 {
    font-size: 15px;
}

.course-card-head p {
    font-size: 11px;
}

.course-icon {
    flex-basis: 38px;
    height: 38px;
    width: 38px;
}

.resource-preview-list {
    gap: 8px;
    padding: 12px;
}

.resource-preview-item {
    border-radius: 10px;
    padding: 10px;
}

.resource-preview-item strong,
.resource-line-main strong {
    font-size: 12px;
}

.resource-preview-item small,
.resource-line-main small {
    font-size: 10px;
}

.file-icon {
    border-radius: 10px;
    flex-basis: 34px;
    height: 34px;
    width: 34px;
}

.course-card-foot {
    padding: 11px 13px;
}

.course-card-foot span,
.course-card-foot a,
.row-actions a,
.featured-card p {
    font-size: 11px;
}

.featured-card {
    padding: 12px;
}

.featured-card h3 {
    font-size: 12.5px;
}

.course-hero {
    padding: 18px;
}

.course-detail-layout {
    gap: 16px;
    grid-template-columns: minmax(0, 1fr) 280px;
}

.resource-list {
    padding: 10px 16px 16px;
}

.resource-line {
    gap: 12px;
    grid-template-columns: minmax(240px, 1fr) 92px 88px 120px;
    padding: 12px 0;
}

.file-pill,
.need-pill,
.muted-pill,
.tool-chip {
    font-size: 10px;
    padding: 5px 8px;
}

.icon-action,
.tool-button {
    border-radius: 9px;
    height: 32px;
    width: 32px;
}

.course-info-card,
.viewer-details,
.profile-context,
.form-panel {
    padding: 16px;
}

.course-info-card h3 {
    font-size: 23px;
    margin-bottom: 14px;
}

.course-info-card dd,
.viewer-details dd {
    font-size: 12px;
}

.viewer-page {
    gap: 14px;
}

.viewer-topline {
    gap: 12px;
}

.viewer-title h2 {
    font-size: 18px;
}

.document-shell {
    gap: 16px;
    grid-template-columns: minmax(0, 1fr) minmax(360px, 420px);
}

.viewer-toolbar {
    min-height: 46px;
    padding: 0 14px;
}

.toolbar-filename {
    font-size: 11px;
}

.viewer-stage {
    min-height: 560px;
    padding: 14px;
}

.file-preview {
    height: 560px;
}

.file-placeholder {
    min-height: 470px;
    padding: 28px;
}

.document-card-preview {
    min-height: 470px;
    padding: 28px;
}

.preview-page-head {
    margin-bottom: 18px;
}

.preview-page-head h2 {
    font-size: 20px;
}

.preview-page-head img {
    width: 128px;
}

.preview-lead {
    font-size: 12px;
    margin-bottom: 18px;
    padding: 12px 14px;
}

.preview-content-list {
    gap: 10px;
}

.preview-point p {
    font-size: 12.5px;
}

.preview-page-foot {
    font-size: 10px;
    padding-top: 14px;
}

.ai-assistant-card {
    height: min(760px, calc(100vh - 92px));
    min-height: 600px;
}

.ai-head {
    padding: 12px 14px;
}

.ai-icon {
    flex-basis: 36px;
    height: 36px;
    width: 36px;
}

.ai-head h3 {
    font-size: 14px;
}

.ai-messages {
    gap: 9px;
    padding: 12px;
}

.ai-message {
    border-radius: 12px;
    font-size: 12px;
    line-height: 1.45;
    padding: 10px 12px;
}

.ai-suggestions {
    gap: 6px;
    padding: 10px 12px;
}

.ai-suggestions button {
    font-size: 10px;
    min-height: 34px;
    padding: 0 7px;
}

.ai-form {
    gap: 8px;
    grid-template-columns: minmax(0, 1fr) 36px;
    padding: 12px;
}

.ai-form textarea {
    min-height: 40px;
    padding: 10px 11px;
}

.ai-form button {
    height: 36px;
    width: 36px;
}

.profile-layout {
    gap: 16px;
    margin: 26px auto;
}

.form-panel h2 {
    font-size: 18px;
    margin-bottom: 16px;
}

@media (max-width: 1180px) {
    .topbar {
        align-items: stretch;
        flex-direction: column;
        padding: 14px 24px;
    }

    .top-actions {
        flex-wrap: wrap;
        justify-content: flex-start;
    }

    .search-box {
        width: min(100%, 420px);
    }

    .overview-grid,
    .course-detail-layout,
    .document-shell,
    .chat-workspace,
    .profile-layout,
    .profile-dashboard-grid {
        grid-template-columns: 1fr;
    }

    .profile-hero-panel {
        align-items: flex-start;
        flex-direction: column;
    }

    .admin-metric-grid,
    .admin-dashboard-grid,
    .admin-chat-layout,
    .admin-detail-layout,
    .teacher-assistant-workspace {
        grid-template-columns: 1fr;
    }

    .admin-dashboard-grid .wide {
        grid-column: auto;
    }

    .admin-detail-group.compact dl {
        grid-template-columns: 1fr;
    }

    .admin-detail-group.compact div:nth-child(odd) {
        border-right: 0;
    }

    .admin-detail-group.compact div:nth-last-child(2):nth-child(odd) {
        border-bottom: 1px solid var(--line-soft);
    }

    .admin-card-grid,
    .admin-resource-card-grid,
    .teacher-chat-card {
        grid-template-columns: 1fr;
    }

    .teacher-chat-card-meta {
        align-items: flex-start;
        justify-items: start;
    }

    .teacher-assistant-side {
        position: static;
    }

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

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

    .course-info-card,
    .resource-side-panel,
    .chat-history-panel {
        max-height: none;
        position: static;
    }
}

@media (max-width: 860px) {
    .sidebar {
        position: static;
        width: auto;
    }

    body.sidebar-collapsed .sidebar {
        padding: 22px 16px;
        width: auto;
    }

    body.sidebar-collapsed .app-shell {
        margin-left: 0;
    }

    body.sidebar-collapsed .brand-row {
        flex-direction: row;
    }

    body.sidebar-collapsed .brand .brand-full {
        display: block;
    }

    body.sidebar-collapsed .brand .brand-collapsed {
        display: none;
    }

    body.sidebar-collapsed .side-nav a {
        justify-content: flex-start;
        padding: 0 12px;
    }

    body.sidebar-collapsed .nav-label {
        display: inline;
    }

    .sidebar-footer {
        display: none;
    }

    .app-shell {
        margin-left: 0;
    }

    .admin-sidebar {
        position: static;
        width: auto;
    }

    .admin-main {
        margin-left: 0;
        padding: 20px 16px 38px;
    }

    .admin-topbar,
    .admin-panel-head,
    .admin-detail-hero,
    .admin-search-form,
    .admin-form-actions {
        align-items: stretch;
        flex-direction: column;
    }

    .admin-detail-identity {
        align-items: flex-start;
    }

    .admin-detail-hero-actions {
        justify-content: flex-start;
    }

    .main-content {
        padding: 22px 18px 42px;
    }

    .dashboard-hero,
    .course-hero,
    .section-head,
    .resource-toolbar,
    .viewer-topline {
        align-items: stretch;
        display: flex;
        flex-direction: column;
    }

    .live-search-panel {
        left: 0;
        right: auto;
        width: min(100%, calc(100vw - 32px));
    }

    .profile-identity {
        align-items: flex-start;
    }

    .viewer-title {
        text-align: left;
    }

    .overview-grid,
    .quick-grid,
    .course-card-grid,
    .featured-grid {
        grid-template-columns: 1fr;
    }

    .resource-line {
        align-items: start;
        grid-template-columns: 1fr;
    }

    .row-actions {
        justify-content: flex-start;
    }

    .viewer-stage {
        min-height: auto;
        padding: 12px;
    }

    .file-preview {
        height: 560px;
    }

    .ai-assistant-card {
        height: auto;
        min-height: 460px;
    }

    .chat-main-card.ai-assistant-card {
        height: auto;
        min-height: 520px;
    }

    .ai-suggestions {
        grid-template-columns: 1fr;
    }

    .teacher-prompt-grid {
        grid-template-columns: 1fr;
    }

    .ai-head-actions {
        justify-content: flex-start;
    }
}

/* Responsive shell overhaul: consistent drawer navigation across student, staff, and teacher views. */
.mobile-menu-button,
.mobile-top-logo,
.mobile-top-action {
    display: none;
}

.sidebar-scrim,
.admin-sidebar-scrim {
    display: none;
}

.admin-sidebar {
    background: linear-gradient(180deg, #ffffff 0%, #f7fbf8 100%);
    border-right: 1px solid var(--line-soft);
    box-shadow: 8px 0 26px rgba(18, 33, 24, 0.05);
    color: var(--ink);
}

.admin-brand strong {
    color: var(--ink);
}

.admin-brand small {
    color: var(--muted);
}

.admin-nav a,
.admin-sidebar-footer a {
    color: var(--muted);
}

.admin-nav a:hover,
.admin-nav a.active,
.admin-sidebar-footer a:hover {
    background: var(--surface-low);
    color: var(--primary);
}

.admin-nav a.active {
    border: 1px solid var(--line-soft);
    box-shadow: var(--shadow);
}

.admin-sidebar-footer {
    border-top-color: var(--line-soft);
}

.teacher-body .admin-sidebar {
    background: linear-gradient(180deg, #ffffff 0%, #f7fbf8 100%);
    box-shadow: 8px 0 26px rgba(18, 33, 24, 0.05);
}

@media (max-width: 860px) {
    body.mobile-sidebar-open {
        overflow: hidden;
    }

    html,
    body {
        max-width: 100%;
        overflow-x: hidden;
    }

    .mobile-menu-button,
    .mobile-top-action {
        align-items: center;
        background: var(--surface);
        border: 1px solid var(--line-soft);
        border-radius: 12px;
        color: var(--primary);
        display: inline-flex;
        height: 42px;
        justify-content: center;
        padding: 0;
        width: 42px;
    }

    .mobile-menu-button {
        cursor: pointer;
        left: 14px;
        position: fixed !important;
        top: 9px;
        justify-self: start;
    }

    .mobile-top-logo {
        align-items: center;
        display: inline-flex;
        grid-column: 1 / -1;
        grid-row: 1;
        justify-content: center;
        justify-self: center;
        min-width: 0;
        padding: 0 52px;
        width: 100%;
    }

    .mobile-top-action {
        background: var(--primary-soft) !important;
        display: inline-flex !important;
        position: fixed !important;
        right: 14px;
        top: 9px;
        justify-self: end;
        opacity: 1 !important;
        visibility: visible !important;
        z-index: 90;
    }

    .mobile-top-logo img {
        display: block;
        max-height: 42px;
        max-width: min(210px, 54vw);
        object-fit: contain;
        width: auto;
    }

    .sidebar,
    body.sidebar-collapsed .sidebar,
    .admin-sidebar {
        background: linear-gradient(180deg, #ffffff 0%, #f7fbf8 100%);
        border-right: 1px solid var(--line-soft);
        bottom: 0;
        box-shadow: 18px 0 48px rgba(18, 33, 24, 0.16);
        display: flex;
        flex-direction: column;
        left: 0;
        max-width: 320px;
        overflow-y: auto;
        padding: 18px 14px;
        position: fixed;
        top: 0;
        transform: translateX(-106%);
        transition: transform 220ms ease;
        width: min(84vw, 320px);
        z-index: 70;
    }

    body.mobile-sidebar-open .sidebar,
    body.mobile-sidebar-open .admin-sidebar {
        transform: translateX(0);
    }

    .sidebar-scrim,
    .admin-sidebar-scrim {
        background: rgba(9, 19, 13, 0.42);
        backdrop-filter: blur(3px);
        display: block;
        inset: 0;
        opacity: 0;
        pointer-events: none;
        position: fixed;
        transition: opacity 180ms ease;
        z-index: 60;
    }

    body.mobile-sidebar-open .sidebar-scrim,
    body.mobile-sidebar-open .admin-sidebar-scrim {
        opacity: 1;
        pointer-events: auto;
    }

    body.sidebar-collapsed .brand-row {
        flex-direction: row;
    }

    body.sidebar-collapsed .brand .brand-full {
        display: block;
    }

    body.sidebar-collapsed .brand .brand-collapsed {
        display: none;
    }

    body.sidebar-collapsed .side-nav a {
        justify-content: flex-start;
        padding: 0 12px;
    }

    body.sidebar-collapsed .nav-label {
        display: inline;
    }

    .brand-row {
        margin-bottom: 22px;
    }

    .brand .brand-full,
    .admin-brand img,
    .teacher-body .admin-brand img {
        max-width: 190px;
        width: 100%;
    }

    .sidebar-toggle {
        background: var(--primary-soft);
        color: var(--primary);
        flex: 0 0 auto;
    }

    .side-nav a,
    .admin-nav a,
    .admin-sidebar-footer a {
        border-radius: 12px;
        color: var(--muted);
        font-size: 13px;
        min-height: 44px;
    }

    .side-nav a.active,
    .admin-nav a.active {
        background: var(--primary-soft);
        color: var(--primary);
    }

    .side-nav a.active::after {
        display: none;
    }

    .sidebar-footer {
        display: flex;
        margin-top: auto;
        position: static;
    }

    .app-shell,
    body.sidebar-collapsed .app-shell,
    .admin-main {
        margin-left: 0;
    }

    .topbar,
    .admin-topbar {
        align-items: center;
        display: grid;
        gap: 10px;
        grid-template-columns: 44px minmax(0, 1fr) 44px;
        min-height: 64px;
        padding: 9px 14px;
        position: sticky;
        left: 0;
        max-width: 100vw;
        right: 0;
        top: 0;
        width: 100vw;
    }

    .topbar-copy,
    .admin-user-chip {
        display: none;
    }

    .admin-topbar-title {
        grid-column: 1 / -1;
        min-width: 0;
    }

    .admin-topbar h1 {
        font-size: 23px;
    }

    .top-actions {
        display: grid;
        gap: 8px;
        grid-column: 1 / -1;
        grid-template-columns: 1fr;
        min-width: 0;
        width: 100%;
    }

    .top-actions .session-pill,
    .top-actions .user-chip {
        display: none;
    }

    .search-box {
        width: 100%;
    }

    .main-content,
    .admin-main {
        padding: 18px 14px 36px;
    }

    .dashboard-hero,
    .course-hero,
    .section-head,
    .resource-toolbar,
    .viewer-topline {
        min-width: 0;
        overflow: hidden;
    }

    .dashboard-hero p,
    .course-hero p,
    .section-head p {
        max-width: 100%;
        overflow-wrap: anywhere;
    }

    .admin-page-shell {
        max-width: 100%;
    }

    .teacher-profile-card {
        box-shadow: none;
    }
}