/* ICUU — shared interface. All colors have a light and a dark counterpart. */
:root {
  color-scheme: light;
  --bg-solid: #f6f7fa;
  --bg-body: none;
  --card-bg: #ffffff;
  --card-border: #e5e7ee;
  --card-hover: #d4d8e4;
  --strip-bg: #f8f9fc;
  --chart-box-bg: #fafbfe;
  --subtle-box: #f5f6fa;
  --table-header-bg: #f8f9fc;
  --table-row-hover: #f8f9fd;
  --table-border: #eceef3;
  --search-bg: #ffffff;
  --search-border: #dce0e9;
  --tab-btn-bg: transparent;
  --tab-btn-text: #606a7f;
  --tab-btn-hover: #eef0f7;
  --tag-bg: #f3f4f8;
  --tag-border: transparent;
  --text: #30394c;
  --text-heading: #172136;
  --text-muted: #657087;
  --text-dim: #738096;
  --primary: #505bd8;
  --primary-light: #6c75e5;
  --primary-dark: #3f48b6;
  --primary-soft: #eef0ff;
  --success: #258575;
  --warning: #b4792c;
  --danger: #bd5b61;
  --c-pos: #237c69;
  --c-info: #4b61bf;
  --c-warn: #9c6623;
  --c-neg: #b54f58;
  --positive-soft: #edf7f2;
  --negative-soft: #fbf0f1;
  --warning-soft: #faf3e8;
  --chart-grid: #e7eaf1;
  --chart-text: #354059;
  --chart-text-dim: #6b768b;
  --chart-benchmark: #b17b36;
  --shadow: 0 2px 8px #18244104;
  --card-shadow: 0 1px 3px #18244103;
  --nav-bg: #ffffff;
  --nav-solid: #ffffff;
  --nav-shadow: none;
  --sidebar-width: 216px;
  --radius: 14px;
}
[data-theme="dark"] {
  color-scheme: dark;
  --bg-solid: #11141c;
  --card-bg: #191e29;
  --card-border: #2b3242;
  --card-hover: #414c64;
  --strip-bg: #1d2330;
  --chart-box-bg: #161c26;
  --subtle-box: #212736;
  --table-header-bg: #1e2431;
  --table-row-hover: #202839;
  --table-border: #2a3140;
  --search-bg: #161c28;
  --search-border: #374155;
  --tab-btn-text: #a9b3c9;
  --tab-btn-hover: #2b3347;
  --tag-bg: #262d3d;
  --text: #d3d9e7;
  --text-heading: #f0f3fa;
  --text-muted: #a7b1c5;
  --text-dim: #909eb7;
  --primary: #a2aaff;
  --primary-light: #b6bdff;
  --primary-dark: #c2c7ff;
  --primary-soft: #2b3050;
  --success: #80c9b7;
  --warning: #dfb476;
  --danger: #e09b9f;
  --c-pos: #88cdbb;
  --c-info: #a6b6f2;
  --c-warn: #dfb779;
  --c-neg: #e7a0a7;
  --positive-soft: #213b34;
  --negative-soft: #3d2b33;
  --warning-soft: #3b3328;
  --chart-grid: #30384a;
  --chart-text: #d3dbed;
  --chart-text-dim: #a0adc5;
  --chart-benchmark: #dfb779;
  --nav-bg: #171b25;
  --nav-solid: #171b25;
  --shadow: none;
  --card-shadow: none;
}
*, *::before, *::after { box-sizing: border-box; }
html { background: var(--bg-solid); scrollbar-gutter: stable; -webkit-text-size-adjust: 100%; scroll-padding-top: 88px; }
body { margin: 0; color: var(--text); background: var(--bg-solid); font: 16px/1.6 Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; -webkit-font-smoothing: antialiased; }
h1, h2, h3, p { margin: 0; }
a { color: var(--primary); text-decoration: none; }
button, input, select { font: inherit; }
button, summary, a, input { -webkit-tap-highlight-color: transparent; }
button, a, input, summary { touch-action: manipulation; }
button { cursor: pointer; }
button, a, input { transition: background-color .15s, border-color .15s, color .15s; }
button:disabled { cursor: not-allowed; opacity: .4; }
:focus-visible { outline: 3px solid var(--primary); outline-offset: 3px; }
::selection { background: var(--primary-soft); color: var(--text-heading); }
.svg-icon, .svg-chevron { display: inline-block; vertical-align: -.16em; flex-shrink: 0; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
.skip-link { position: fixed; top: -100px; left: 24px; padding: 10px 20px; background: var(--card-bg); z-index: 20000; border: 1px solid var(--primary); border-radius: 8px; }
.skip-link:focus { top: 12px; }
.sidebar { position: fixed; inset: 0 auto 0 0; width: var(--sidebar-width); background: var(--nav-bg); border-right: 1px solid var(--card-border); z-index: 60; display: flex; flex-direction: column; padding: 28px 16px 20px; overflow-y: auto; }
.brand { display: flex; align-items: center; gap: 11px; padding: 0 12px; color: var(--text-heading); }
.brand-mark { display: grid; place-items: center; width: 36px; height: 38px; border-radius: 10px; color: #fff; background: #505bd8; }
.brand-name { display: block; font-size: 18px; font-weight: 700; letter-spacing: .02em; line-height: 1.45; }
.brand-caption { display: block; font-size: 12px; letter-spacing: .12em; color: var(--text-muted); margin-top: 2px; }
.nav-bar { display: flex; flex-direction: column; gap: 26px; margin-top: 36px; }
.nav-group { display: flex; flex-direction: column; gap: 4px; }
.nav-group-title { padding: 0 13px 8px; color: var(--text-dim); font-size: 12px; letter-spacing: .04em; }
.nav-link { display: flex; align-items: center; gap: 10px; padding: 11px 12px; border-radius: 8px; font-size: 14px; line-height: 1.4; font-weight: 500; color: var(--text-muted); white-space: nowrap; }
.nav-link:hover { color: var(--text-heading); background: var(--subtle-box); }
.nav-link.active { background: var(--primary-soft); color: var(--primary); font-weight: 650; }
.nav-link .svg-icon { opacity: .9; }
.nav-count { margin-left: auto; color: var(--text-dim); font-size: 12px; font-weight: 450; font-variant-numeric: tabular-nums; }
.nav-link.active .nav-count { color: var(--primary); }
.sidebar-note { margin-top: auto; padding: 24px 12px 0; }
.sidebar-note-inner { border-top: 1px solid var(--card-border); padding-top: 16px; font-size: 12px; color: var(--text-muted); line-height: 1.9; }
.sidebar-note-title { color: var(--text-heading); font-weight: 550; }
.status-dot { display: inline-block; width: 6px; height: 6px; background: var(--success); border-radius: 50%; margin-right: 6px; }
.workspace { margin-left: var(--sidebar-width); min-width: 0; }
.topbar { position: sticky; top: 0; z-index: 40; background: var(--bg-solid); border-bottom: 1px solid var(--card-border); min-height: 68px; padding: 12px 36px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.breadcrumb { display: flex; align-items: center; gap: 12px; font-size: 13px; color: var(--text-muted); }
.breadcrumb-current { color: var(--text-heading); font-weight: 550; }
.breadcrumb-slash { color: var(--text-dim); opacity: .5; }
.topbar-actions { display: flex; align-items: center; gap: 16px; }
.period-chip { display: flex; align-items: center; gap: 7px; font-size: 13px; color: var(--text-muted); }
.theme-toggle-btn { width: 38px; height: 38px; display: grid; place-items: center; border: 1px solid var(--card-border); color: var(--text-muted); background: var(--card-bg); border-radius: 9px; padding: 0; }
.theme-toggle-btn:hover { background: var(--primary-soft); border-color: var(--card-hover); color: var(--primary); }
.theme-toggle-btn #theme-text { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.container { width: 100%; max-width: 1660px; margin: 0 auto; padding: 29px 36px 24px; }
.page-heading { display: flex; justify-content: space-between; align-items: center; gap: 20px; margin-bottom: 24px; }
h1 { color: var(--text-heading); font-size: 29px; font-weight: 700; letter-spacing: -.035em; line-height: 1.35; }
.subtitle { color: var(--text-muted); font-size: 15px; margin-top: 7px; line-height: 1.7; }
.heading-link { flex-shrink: 0; display: inline-flex; align-items: center; justify-content: center; gap: 10px; padding: 10px 16px; background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 9px; font-size: 14px; font-weight: 550; color: var(--text-heading); }
.heading-link:hover { border-color: var(--primary); color: var(--primary); }
.heading-count { flex-shrink: 0; text-align: right; font-size: 13px; color: var(--text-muted); }
.heading-count strong { font-size: 27px; color: var(--text-heading); font-weight: 600; font-variant-numeric: tabular-nums; margin-right: 5px; letter-spacing: -.04em; }
.kpi-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); background: var(--card-bg); border: 1px solid var(--card-border); border-radius: var(--radius); margin-bottom: 18px; padding: 22px 0; box-shadow: var(--card-shadow); }
.kpi-card { min-width: 0; padding: 0 24px; border-right: 1px solid var(--card-border); }
.kpi-card:last-child { border: 0; }
.kpi-title { color: var(--text-muted); font-size: 13px; font-weight: 500; display: flex; gap: 7px; align-items: center; }
.kpi-title .svg-icon { color: var(--text-dim); }
.kpi-value { color: var(--text-heading); font-size: 34px; font-weight: 600; line-height: 1.45; letter-spacing: -.045em; margin-top: 7px; font-variant-numeric: tabular-nums; }
.kpi-unit { font-size: 13px; font-weight: 450; color: var(--text-muted); letter-spacing: 0; margin-left: 5px; }
.kpi-meta { font-size: 12px; color: var(--text-dim); line-height: 1.6; margin-top: 2px; overflow-wrap: anywhere; }
.kpi-card:last-child .kpi-value { color: var(--c-warn); }
.scope-note { border: 1px solid var(--card-border); border-radius: 9px; background: var(--card-bg); margin: 0 0 24px; font-size: 14px; }
.scope-note > summary { display: flex; align-items: center; gap: 10px; list-style: none; padding: 11px 16px; cursor: pointer; color: var(--text-muted); }
summary::-webkit-details-marker { display: none; }
.scope-note > summary > .svg-icon { color: var(--primary); }
.scope-note strong { color: var(--text-heading); font-weight: 550; }
.scope-action { margin-left: auto; display: flex; align-items: center; gap: 6px; flex-shrink: 0; color: var(--text-muted); font-size: 12px; }
.scope-note[open] .scope-action .svg-icon, .method-note[open] .method-chevron { transform: rotate(180deg); }
.scope-body { padding: 3px 20px 18px 44px; font-size: 14px; line-height: 1.9; color: var(--text-muted); }
.scope-body strong { font-weight: 550; }
.section-card { min-width: 0; background: var(--card-bg); border: 1px solid var(--card-border); border-radius: var(--radius); padding: 22px 24px; margin-bottom: 24px; box-shadow: var(--card-shadow); scroll-margin-top: 90px; }
.section-header { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; margin-bottom: 20px; }
.section-title { display: inline-flex; gap: 9px; align-items: center; color: var(--text-heading); font-size: 18px; line-height: 1.5; font-weight: 650; letter-spacing: -.015em; }
.section-title .svg-icon { color: var(--text-muted); }
.section-caption { font-size: 13px; color: var(--text-muted); margin-top: 4px; }
.section-meta { font-size: 12px; color: var(--text-dim); display: inline-flex; align-items: center; gap: 5px; }
.count-badge { display: inline-flex; align-items: center; font-size: 12px; font-weight: 550; padding: 1px 8px; border-radius: 5px; background: var(--subtle-box); color: var(--text-muted); letter-spacing: 0; }
.toolbar { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; padding: 16px; background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 11px; margin-bottom: 22px; }
.section-card > .toolbar { border: 0; border-radius: 0; padding: 0 0 18px; margin-bottom: 0; }
.filter-group { display: flex; flex-wrap: wrap; align-items: center; gap: 4px; min-width: 0; }
.filter-group > span { font-size: 13px !important; color: var(--text-muted) !important; margin-right: 8px !important; }
.tab-btn { background: transparent; border: 1px solid transparent; color: var(--text-muted); border-radius: 7px; font-size: 14px; font-weight: 500; padding: 7px 10px; line-height: 1.5; white-space: nowrap; }
.tab-btn:hover { background: var(--subtle-box); color: var(--text-heading); }
.tab-btn.active { background: var(--primary-soft); color: var(--primary); font-weight: 600; }
.search-box-wrap { display: inline-flex; position: relative; align-items: center; min-width: 0; max-width: 100%; }
.search-icon { position: absolute; left: 13px; color: var(--text-dim); pointer-events: none; }
.search-box { appearance: none; width: 270px; max-width: 100%; min-width: 0; border-radius: 8px; padding: 10px 13px; border: 1px solid var(--search-border); background: var(--search-bg); color: var(--text); outline: none; font-size: 14px; line-height: 1.5; }
.search-box.with-icon { padding-left: 38px !important; }
.search-box:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }
.search-box::placeholder { color: var(--text-dim); opacity: 1; }
.search-row { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.search-row > .search-box-wrap { flex: 1; min-width: min(280px,100%); }
.search-row .search-box { width: 100%; }
.filter-stack { display: flex; gap: 12px 20px; align-items: center; flex-wrap: wrap; }
.filter-stack .cat-group { flex-basis: 100%; border-top: 1px solid var(--table-border); padding-top: 12px; }
.advanced-filters { min-width: 0; }
.advanced-filters > summary { display: none; list-style: none; cursor: pointer; font-size: 14px; color: var(--text-heading); }
.advanced-filter-heading { display: inline-flex; gap: 8px; align-items: center; font-weight: 550; }
.advanced-filter-summary { color: var(--text-muted); font-size: 12px; }
.advanced-filters[open] .advanced-filter-chevron { transform: rotate(180deg); }
.result-count, #course-count-badge, #match-count { font-size: 13px !important; color: var(--text-muted) !important; font-weight: 450 !important; white-space: nowrap; }
.table-scroll { overflow-x: auto; overscroll-behavior-x: contain; -webkit-overflow-scrolling: touch; }
.disparity-table { width: 100%; border-collapse: collapse; font-size: 14px; text-align: left; font-variant-numeric: tabular-nums; }
.disparity-table th { background: var(--table-header-bg); color: var(--text-muted); font-size: 12px; font-weight: 500; text-align: left; white-space: nowrap; padding: 12px; border-bottom: 1px solid var(--card-border); }
.disparity-table th:first-child { border-radius: 7px 0 0 0; }
.disparity-table th:last-child { border-radius: 0 7px 0 0; }
.disparity-table td { padding: 15px 12px; border-bottom: 1px solid var(--table-border); vertical-align: middle; }
.disparity-table tbody tr:last-child td { border-bottom: 0; }
.disparity-table tr:hover td { background: var(--table-row-hover); }
.rank-cell { width: 42px; color: var(--text-dim); font-size: 13px; }
.mobile-rank { display: none; }
.course-cell { min-width: 178px; max-width: 300px; }
.course-cell a { font-weight: 600; color: var(--text-heading); line-height: 1.6; }
.course-cell a:hover, .teacher-link:hover { color: var(--primary); }
.course-cell a .svg-icon { opacity: 0; transition: opacity .15s; }
.course-cell a:hover .svg-icon { opacity: .7; }
.cell-secondary { display: block; color: var(--text-dim); font-size: 12px; font-weight: 400; margin-top: 4px; }
.term-cell { white-space: nowrap; color: var(--text-muted); font-size: 13px; }
.teacher-count-cell { white-space: nowrap; color: var(--text-muted); }
.teacher-result { display: flex; align-items: baseline; gap: 8px; white-space: nowrap; }
.teacher-link { color: var(--text); font-size: 14px; }
.teacher-result strong { font-weight: 600; font-size: 15px; color: var(--text-heading); }
.high-cell .teacher-result strong { color: var(--c-pos); }
.low-cell .teacher-result strong { color: var(--c-neg); }
.gap-cell { min-width: 114px; }
.gap-number { font-weight: 650; color: var(--c-warn); font-size: 17px; letter-spacing: -.025em; }
.gap-unit { font-size: 12px; margin-left: 3px; color: var(--text-dim); }
.gap-meter { display: block; width: 78px; height: 3px; border-radius: 3px; background: var(--subtle-box); margin-top: 4px; overflow: hidden; }
.gap-meter i { display: block; height: 100%; border-radius: inherit; background: #c7a16d; }
.gap-caption { display: none; }
.gap-assessment { display: block; margin-top: 5px; color: var(--text-dim); font-size: 12px; }
.z-cell { white-space: nowrap; font-size: 14px; font-weight: 550; color: var(--text-muted); }
.z-cell small { color: var(--text-dim); font-weight: 400; }
.badge-pill, .tag { display: inline-flex; align-items: center; gap: 5px; padding: 3px 8px; font-size: 12px; line-height: 1.6; border-radius: 5px; background: var(--tag-bg); color: var(--text-muted); border: 1px solid transparent; }
.tag-term, .tag-category { background: var(--tag-bg); color: var(--text-muted); }
.disparity-badge { display: inline-block; border-radius: 4px; font-size: 12px; padding: 2px 6px; font-weight: 500; }
.badge-severe { background: var(--negative-soft); color: var(--c-neg); }
.badge-moderate { background: var(--warning-soft); color: var(--c-warn); }
.badge-mild { background: var(--positive-soft); color: var(--c-pos); }
.pagination-wrap { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 6px; margin: 22px 0 0; padding-top: 16px; border-top: 1px solid var(--table-border); }
.page-btn { border: 1px solid var(--card-border); border-radius: 7px; background: var(--card-bg); color: var(--text-muted); font-size: 13px; line-height: 1.5; min-height: 36px; padding: 7px 11px; }
.page-btn:hover:not(:disabled) { background: var(--primary-soft); border-color: var(--primary); color: var(--primary); }
.page-info { color: var(--text-muted); font-size: 13px; margin: 0 12px; font-variant-numeric: tabular-nums; }
.method-note { border: 1px solid var(--card-border); border-radius: 10px; background: var(--card-bg); margin: 0 0 24px; }
.method-note > summary { cursor: pointer; display: flex; align-items: center; flex-wrap: wrap; gap: 10px; list-style: none; padding: 16px 20px; font-size: 14px; font-weight: 550; color: var(--text-heading); }
.method-note > summary > .svg-icon { color: var(--text-muted); }
.formula { margin-left: auto; color: var(--text-muted); font-size: 13px; font-weight: 400; }
.method-body { padding: 0 22px 22px; font-size: 14px; line-height: 1.9; color: var(--text-muted); }
.method-body h3 { color: var(--text-heading); font-size: 15px; margin-bottom: 8px; }
.method-body h3 .svg-icon { display: none; }
.split-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 20px; margin-bottom: 24px; }
.split-grid .section-card { margin-bottom: 0; padding: 22px; }
.split-grid .disparity-table { font-size: 13px; }
.split-grid .disparity-table td { padding: 12px 9px; }
.split-grid .disparity-table th { padding: 11px 9px; }
.split-grid .disparity-table a { white-space: nowrap; }
.split-grid .section-title { color: var(--text-heading) !important; font-size: 17px; }
.split-grid .section-header { margin-bottom: 18px; }
.split-grid .section-title .svg-icon { display: none; }
.course-list { display: flex; flex-direction: column; gap: 24px; }
.course-card { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: var(--radius); padding: 24px; min-width: 0; box-shadow: var(--card-shadow); content-visibility: auto; contain-intrinsic-size: auto 700px; }
.course-card:first-of-type { content-visibility: visible; }
.course-card-header { display: flex; justify-content: space-between; align-items: flex-start; gap: 20px; flex-wrap: wrap; padding-bottom: 20px; border-bottom: 1px solid var(--card-border); }
.course-title-block { min-width: 0; flex: 1 1 320px; }
.course-name { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; font-size: 20px; font-weight: 650; color: var(--text-heading); line-height: 1.5; }
.course-name > span:first-child { overflow-wrap: anywhere; }
.course-name .course-code { font: 12px/1.6 ui-monospace, "Cascadia Code", Consolas, monospace; color: var(--text-dim); background: transparent; border: 0; padding: 0; }
.course-meta-tags { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; margin-top: 10px; }
.course-stats-strip { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 18px; min-width: min(100%,390px); background: var(--strip-bg); border: 1px solid var(--table-border); border-radius: 10px; padding: 12px 16px; }
.strip-item { display: flex; flex-direction: column; gap: 3px; }
.strip-label { color: var(--text-muted); font-size: 12px; white-space: nowrap; }
.strip-val { font-size: 18px; font-weight: 600; color: var(--text-heading); font-variant-numeric: tabular-nums; white-space: nowrap; }
.teachers-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(min(320px,100%),1fr)); gap: 16px; margin-top: 20px; align-items: start; }
.teacher-card { display: flex; flex-direction: column; gap: 15px; padding: 18px; border: 1px solid var(--card-border); border-radius: 10px; background: var(--card-bg); min-width: 0; }
.teacher-header { display: flex; justify-content: space-between; align-items: flex-start; gap: 10px; }
.teacher-header > div:first-child { min-width: 0; }
.teacher-name { display: flex; align-items: center; flex-wrap: wrap; gap: 7px; font-size: 17px; color: var(--text-heading); font-weight: 600; }
.teacher-name .tag { font-size: 12px !important; font-weight: 400; }
.teacher-class-tag { color: var(--text-muted); font-size: 12px; line-height: 1.7; margin-top: 5px; overflow-wrap: anywhere; }
.teacher-score-badge { font-size: 26px; line-height: 1.25; font-weight: 600; text-align: right; background: transparent; padding: 1px 0 0 8px; white-space: nowrap; font-variant-numeric: tabular-nums; letter-spacing: -.03em; }
.teacher-score-badge > div { font-size: 12px !important; font-weight: 400 !important; opacity: 1 !important; color: var(--text-muted); letter-spacing: 0; margin-top: 4px; }
.score-high { color: var(--c-pos); }
.score-mid { color: var(--c-info); }
.score-low { color: var(--c-warn); }
.score-severe-low { color: var(--c-neg); }
.metrics-row { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 10px 8px; background: var(--strip-bg); border-radius: 7px; padding: 12px; text-align: left; }
.m-title { font-size: 12px; color: var(--text-muted); line-height: 1.5; }
.m-val { font-size: 15px; font-weight: 550; color: var(--text-heading); margin-top: 5px; font-variant-numeric: tabular-nums; }
.dist-bar-container { display: flex; flex-direction: column; gap: 7px; }
.dist-bar-label { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 4px; font-size: 12px; color: var(--text-muted); }
.dist-bar { display: flex; height: 7px; border-radius: 3px; overflow: hidden; background: var(--tag-bg); gap: 2px; }
.dist-segment { height: 100%; flex-shrink: 1; }
.seg-90 { background: #6da99d; }
.seg-80 { background: #8190ca; }
.seg-70 { background: #c7b27f; }
.seg-60 { background: #c79879; }
.seg-fail { background: #c88189; }
.dist-legend { display: flex; flex-wrap: wrap; gap: 5px 12px; font-size: 12px; margin-top: 2px; }
.legend-item { display: flex; align-items: center; gap: 4px; color: var(--text-muted); }
.legend-dot { width: 6px; height: 6px; border-radius: 2px; flex-shrink: 0; }
.toggle-students-btn { display: flex; align-items: center; justify-content: space-between; gap: 8px; width: 100%; padding: 9px 11px; min-height: 40px; border: 1px solid var(--card-border); border-radius: 7px; background: var(--card-bg); color: var(--text-muted); text-align: left; font-size: 13px; font-weight: 450; }
.toggle-students-btn:hover { color: var(--primary); border-color: var(--primary); background: var(--primary-soft); }
.students-table-wrap { display: none; margin-top: 10px; max-height: 280px; overflow-y: auto; overscroll-behavior: contain; contain: content; padding: 12px; border: 1px solid var(--card-border); border-radius: 7px; background: var(--strip-bg); }
.students-table-wrap.is-open { display: block; }
.freq-title { font-size: 13px; color: var(--text-muted); margin-bottom: 8px; }
.freq-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.score-badge-chip { display: inline-flex; align-items: center; gap: 4px; font: 12px/1.7 ui-monospace, Consolas, monospace; border: 1px solid var(--card-border); background: var(--card-bg); padding: 3px 7px; border-radius: 5px; }
.chip-pos { color: var(--c-pos); } .chip-info { color: var(--c-info); } .chip-warn { color: var(--c-warn); } .chip-neg { color: var(--c-neg); }
.teacher-dir-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 22px; align-items: start; }
.teacher-dir-card { display: flex; flex-direction: column; gap: 18px; min-width: 0; padding: 24px; background: var(--card-bg); border: 1px solid var(--card-border); border-radius: var(--radius); content-visibility: auto; contain-intrinsic-size: auto 560px; }
.teacher-dir-card:nth-child(-n+2) { content-visibility: visible; }
.teacher-courses-label { font-size: 13px; color: var(--text-muted); font-weight: 550; margin-bottom: 9px; }
.course-history-list { display: flex; flex-direction: column; font-size: 13px; }
.tc-item { border-bottom: 1px solid var(--table-border); }
.tc-item:last-child { border: 0; }
.tc-head { display: flex; flex-direction: column; align-items: stretch; gap: 6px; width: 100%; text-align: left; background: transparent; color: var(--text-muted); border: 0; border-radius: 6px; padding: 12px 6px; font-size: 13px; }
.tc-head:hover, .tc-item.is-open > .tc-head { background: var(--strip-bg); }
.tc-name { display: flex; align-items: baseline; gap: 7px; min-width: 0; flex-wrap: wrap; }
.tc-title { flex: 1; min-width: 90px; color: var(--text-heading); font-weight: 550; white-space: normal; overflow-wrap: anywhere; }
.tc-chevron { display: inline-flex; align-self: center; color: var(--text-dim); flex-shrink: 0; }
.tc-name .tag { font-size: 12px; padding: 1px 5px; }
.tc-sum { padding-left: 19px; font-size: 12px; color: var(--text-muted); }
.tc-sum strong { color: var(--c-info); font-weight: 550; }
.tc-body { display: none; padding: 10px 6px 18px; }
.tc-item.is-open > .tc-body { display: block; }
.tc-meta { display: flex; flex-wrap: wrap; gap: 5px; margin-bottom: 10px; }
.tc-classes { font-size: 12px; color: var(--text-muted); margin-bottom: 12px; overflow-wrap: anywhere; }
.tc-body .metrics-row, .tc-body .dist-bar-container { margin-bottom: 14px; }
.native-chart-wrapper { margin-top: 20px; background: var(--chart-box-bg); border: 1px solid var(--table-border); border-radius: 10px; padding: 18px; overflow-x: auto; overscroll-behavior-x: contain; -webkit-overflow-scrolling: touch; }
.native-chart-wrapper .chart-svg { display: block; width: 100%; max-width: var(--chart-nat-w,none); min-width: var(--chart-min-w,620px); height: auto; margin: 0 auto; cursor: zoom-in; }
.chart-grid-line { stroke: var(--chart-grid); }
.chart-bench-line { stroke: var(--chart-benchmark); }
.chart-axis-label, .chart-teacher-sub { fill: var(--chart-text-dim); }
.chart-pct-axis, .chart-pct-label { fill: var(--c-pos); }
.chart-teacher { fill: var(--chart-text); }
.chart-mean-label { fill: var(--c-info); }
.chart-bench-swatch { width: 14px; border-top: 2px dashed var(--chart-benchmark); }
.chart-bench-text { color: var(--chart-benchmark); }
.chart-header-row { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; font-size: 13px; color: var(--text-muted); margin-bottom: 16px; }
.chart-legend-row { display: flex; align-items: center; flex-wrap: wrap; gap: 6px 14px; font-size: 12px; }
.chart-legend-item { display: flex; align-items: center; gap: 5px; }
.chart-legend-box { width: 9px; height: 9px; border-radius: 2px; }
.chart-zoom-btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; font-size: 13px; min-height: 34px; padding: 6px 10px; color: var(--text-muted); background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 7px; }
.chart-zoom-btn:hover { color: var(--primary); border-color: var(--primary); }
.chart-modal { position: fixed; inset: 0; z-index: 9999; display: none; flex-direction: column; background: #0b1023a8; }
.chart-modal.is-open { display: flex; }
.chart-modal-panel { display: flex; flex-direction: column; flex: 1; min-height: 0; margin: max(20px,env(safe-area-inset-top)) 20px max(20px,env(safe-area-inset-bottom)); border: 1px solid var(--card-border); border-radius: 14px; background: var(--card-bg); overflow: hidden; box-shadow: 0 30px 80px #0003; }
.chart-modal-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 18px; border-bottom: 1px solid var(--card-border); }
.chart-modal-title { min-width: 0; font-size: 15px; font-weight: 600; color: var(--text-heading); overflow-wrap: anywhere; }
.chart-modal-tools { display: flex; align-items: center; gap: 6px; flex-shrink: 0; }
.chart-modal-btn { display: inline-flex; align-items: center; justify-content: center; background: var(--card-bg); color: var(--text); border: 1px solid var(--card-border); border-radius: 8px; min-width: 40px; min-height: 40px; padding: 8px 10px; font-size: 14px; }
.chart-modal-btn:hover:not(:disabled) { background: var(--primary-soft); color: var(--primary); }
.chart-modal-zoom { font-size: 13px; color: var(--text-muted); min-width: 44px; text-align: center; font-variant-numeric: tabular-nums; }
.chart-modal-body { flex: 1; min-height: 0; overflow: auto; overscroll-behavior: contain; -webkit-overflow-scrolling: touch; background: var(--chart-box-bg); padding: 20px; }
.chart-modal-stage { width: 100%; }
.chart-modal-stage .chart-svg { display: block; width: 100%; height: auto; min-width: 0; max-width: none; margin: 0; cursor: default; }
.chart-modal-hint { padding: 10px 18px; font-size: 12px; color: var(--text-muted); border-top: 1px solid var(--card-border); }
body.modal-open { overflow: hidden; }
footer { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; border-top: 1px solid var(--card-border); margin-top: 36px; padding: 20px 0 4px; color: var(--text-dim); font-size: 12px; }
footer a { color: var(--text-muted); }
.empty-state { text-align: center; padding: 50px 20px; color: var(--text-muted); }
@media (min-width: 1800px) { :root { --sidebar-width: 232px; } .container { padding-left: 44px; padding-right: 44px; } }
@media (max-width: 1250px) {
  :root { --sidebar-width: 192px; }
  .sidebar { padding-left: 10px; padding-right: 10px; }
  .container { padding: 26px 24px 20px; }
  .topbar { padding-left: 24px; padding-right: 24px; }
  .kpi-card { padding: 0 18px; }
  .kpi-value { font-size: 30px; }
  .disparity-table td { padding: 14px 9px; }
  .disparity-table th { padding: 12px 9px; }
  .teacher-result { flex-direction: column; gap: 1px; }
  .teacher-dir-card { padding: 20px; }
  .metrics-row { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .course-stats-strip { flex: 1 1 100%; }
  .split-grid { grid-template-columns: 1fr; }
}
@media (max-width: 1000px) {
  .sidebar { position: sticky; top: 0; width: 100%; border-right: 0; border-bottom: 1px solid var(--card-border); padding: 12px 20px 0; overflow: visible; }
  .brand { gap: 9px; padding: 0; }
  .brand-mark { width: 30px; height: 30px; border-radius: 8px; }
  .brand-mark svg { width: 18px; height: 18px; }
  .brand-name { font-size: 16px; }
  .brand-caption { display: none; }
  .nav-bar { flex-direction: row; overflow-x: auto; gap: 4px; margin: 10px -20px 0; padding: 0 20px 9px; scrollbar-width: none; overscroll-behavior-x: contain; }
  .nav-bar::-webkit-scrollbar { display: none; }
  .nav-group { flex-direction: row; gap: 4px; }
  .nav-group-title, .nav-count, .sidebar-note { display: none; }
  .nav-link { padding: 9px 12px; font-size: 14px; min-height: 40px; gap: 7px; }
  .nav-link .svg-icon { width: 15px; height: 15px; }
  .workspace { margin-left: 0; }
  .topbar { position: static; min-height: 52px; padding-top: 8px; padding-bottom: 8px; border: 0; }
  .theme-toggle-btn { width: 36px; height: 36px; }
  .container { padding-top: 16px; }
  html { scroll-padding-top: 120px; }
  .section-card { scroll-margin-top: 120px; }
  .period-chip { font-size: 12px; }
}
/* A comparison record becomes a complete, readable card on a phone. */
@media (max-width: 700px) {
  .sidebar { padding: max(12px,env(safe-area-inset-top)) 16px 0; }
  .brand::after { content: "江西师范大学 · 人工智能学院"; font-size: 12px; color: var(--text-dim); margin-left: auto; }
  .nav-bar { margin-left: -16px; margin-right: -16px; padding-left: 16px; padding-right: 16px; }
  .nav-link { min-height: 42px; padding: 10px 12px; }
  .topbar { padding-left: 16px; padding-right: 16px; }
  .breadcrumb { font-size: 12px; gap: 8px; }
  .topbar-actions { gap: 10px; }
  .period-chip .svg-icon { display: none; }
  .container { padding: 10px 16px max(20px,env(safe-area-inset-bottom)); }
  .page-heading { gap: 14px; margin-bottom: 20px; align-items: flex-start; }
  h1 { font-size: 25px; letter-spacing: -.03em; }
  .subtitle { font-size: 14px; margin-top: 6px; }
  .heading-link { font-size: 13px; padding: 9px 11px; min-height: 40px; gap: 5px; margin-top: 0; }
  .heading-count { font-size: 12px; line-height: 1.3; padding-top: 5px; }
  .heading-count strong { font-size: 23px; display: block; margin: 0 0 4px; }
  .kpi-grid { grid-template-columns: repeat(2,minmax(0,1fr)); padding: 0; border-radius: 12px; margin-bottom: 14px; }
  .kpi-card { padding: 15px 17px; border-right: 1px solid var(--card-border); border-bottom: 1px solid var(--card-border); }
  .kpi-card:nth-child(2) { border-right: 0; }
  .kpi-card:nth-child(3) { border-bottom: 0; }
  .kpi-card:last-child { border: 0; }
  .kpi-title { font-size: 12px; gap: 6px; }
  .kpi-title .svg-icon { width: 13px; height: 13px; }
  .kpi-value { font-size: 28px; margin-top: 4px; line-height: 1.4; }
  .kpi-unit { font-size: 12px; margin-left: 3px; }
  .kpi-meta { font-size: 12px; margin-top: 3px; line-height: 1.6; }
  .scope-note { margin-bottom: 20px; background: transparent; border: 0; border-radius: 0; }
  .scope-note > summary { align-items: flex-start; gap: 8px; padding: 0; font-size: 12px; line-height: 1.8; min-height: 44px; }
  .scope-note > summary > .svg-icon { margin-top: 4px; width: 14px; height: 14px; }
  .scope-action { font-size: 12px; padding-top: 0; }
  .scope-action > span { display: none; }
  .scope-body { padding: 10px 0 4px 22px; font-size: 14px; line-height: 1.8; }
  .section-card { padding: 18px 16px; border-radius: 12px; margin-bottom: 20px; }
  .section-title { font-size: 17px; }
  .section-header { margin-bottom: 16px; }
  .section-caption { font-size: 12px; margin-top: 3px; }
  .section-meta { font-size: 12px; }
  .leaderboard { padding: 0; border: 0; background: transparent; box-shadow: none; }
  .leaderboard > .section-header { padding: 0; align-items: baseline; }
  .leaderboard .section-caption { max-width: 260px; }
  .leaderboard > .toolbar { flex-direction: column; align-items: stretch; gap: 12px; padding: 0 0 14px; background: transparent; }
  .leaderboard .filter-group { flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none; padding-bottom: 1px; }
  .leaderboard .filter-group::-webkit-scrollbar { display: none; }
  .leaderboard .search-box-wrap { order: -1; width: 100%; }
  .leaderboard .search-box { width: 100%; }
  .tab-btn { min-height: 42px; padding: 9px 11px; font-size: 14px; }
  .tab-btn.active { background: var(--primary-soft); }
  .search-box { font-size: 16px !important; min-height: 46px; padding-top: 10px !important; padding-bottom: 10px !important; }
  .search-box::placeholder { font-size: 14px; }
  .toolbar { padding: 14px; gap: 12px; margin-bottom: 18px; }
  .toolbar > div { min-width: 0; max-width: 100%; }
  .toolbar > .search-box-wrap, .search-row .search-box-wrap { width: 100%; flex-basis: 100%; }
  .toolbar .search-box-wrap { min-width: 0 !important; }
  .toolbar .search-box { width: 100% !important; }
  .search-row { gap: 8px; }
  .filter-stack { flex-direction: column; align-items: stretch; gap: 12px; }
  .advanced-filters { border-top: 1px solid var(--table-border); padding-top: 10px; }
  .advanced-filters > summary { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 12px; min-height: 44px; }
  .advanced-filter-summary { flex-basis: 100%; order: 3; padding-left: 24px; line-height: 1.7; }
  .advanced-filter-chevron { margin-left: auto; }
  .advanced-filters[open] > summary { margin-bottom: 14px; }
  .advanced-filters .filter-stack .cat-group { border: 0; padding-top: 0; }
  .filter-stack .cat-group { padding-top: 10px; }
  .filter-stack .filter-group { flex-wrap: wrap; gap: 4px; }
  .filter-stack .filter-group > span { flex-basis: 100%; font-size: 12px !important; margin: 0 0 1px !important; }
  .filter-stack .tab-btn { font-size: 13px; padding: 9px; }
  .leaderboard .table-scroll { overflow: visible; }
  .comparison-table { display: block; }
  .comparison-table thead { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
  .comparison-table tbody { display: grid; gap: 12px; }
  .comparison-table tbody tr { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1fr); grid-template-areas: "course gap" "high low" "term teachers" "z z"; gap: 13px 16px; background: var(--card-bg); padding: 17px; border: 1px solid var(--card-border); border-radius: 12px; }
  .comparison-table td { display: block; padding: 0; border: 0; min-width: 0; max-width: none; }
  .comparison-table tr:hover td { background: transparent; }
  .comparison-table .rank-cell { display: none; }
  .comparison-table .course-cell { grid-area: course; }
  .mobile-rank { display: block; font-size: 12px; letter-spacing: .02em; color: var(--text-dim); margin-bottom: 5px; font-weight: 400; }
  .course-cell a { font-size: 16px; }
  .course-cell a .svg-icon { display: none; }
  .cell-secondary { font-size: 12px; margin-top: 5px; }
  .comparison-table .gap-cell { grid-area: gap; text-align: right; justify-self: end; }
  .gap-caption { display: block; font-size: 12px; color: var(--text-muted); margin-bottom: 1px; }
  .gap-number { font-size: 27px; line-height: 1.4; }
  .gap-meter { display: none; }
  .gap-assessment { font-size: 12px; margin-top: 1px; }
  .comparison-table .high-cell { grid-area: high; background: var(--strip-bg); border-radius: 7px; padding: 10px 12px; }
  .comparison-table .low-cell { grid-area: low; background: var(--strip-bg); border-radius: 7px; padding: 10px 12px; }
  .high-cell::before, .low-cell::before { content: attr(data-label); display: block; font-size: 12px; color: var(--text-muted); margin-bottom: 5px; }
  .teacher-result { flex-direction: row; gap: 7px; flex-wrap: wrap; }
  .teacher-link { font-size: 14px; }
  .teacher-result strong { font-size: 17px; }
  .comparison-table .term-cell { grid-area: term; font-size: 12px; color: var(--text-muted); }
  .comparison-table .teacher-count-cell { grid-area: teachers; font-size: 12px; color: var(--text-muted); text-align: right; }
  .teacher-count-cell::before { content: "任课教师 "; }
  .comparison-table .z-cell { grid-area: z; padding-top: 10px; border-top: 1px solid var(--table-border); text-align: right; font-size: 13px; display: flex; justify-content: space-between; gap: 12px; }
  .z-cell::before { content: attr(data-label); color: var(--text-muted); font-size: 12px; font-weight: 400; }
  .comparison-table .empty-row { display: block; }
  .comparison-table .empty-row td { padding: 28px 10px; text-align: center; }
  .pagination-wrap { gap: 7px; margin-top: 18px; padding-top: 16px; }
  .page-btn { min-height: 42px; padding: 9px 12px; }
  .page-info { order: -1; width: 100%; text-align: center; margin: 0 0 6px; font-size: 12px; }
  .method-note > summary { padding: 15px; gap: 9px; }
  .formula { margin-left: 25px; flex-basis: calc(100% - 50px); font-size: 12px; order: 2; }
  .method-chevron { margin-left: auto; }
  .method-body { padding: 0 16px 18px; }
  .split-grid { gap: 18px; }
  .split-grid .section-card { padding: 17px 14px; }
  .split-grid .disparity-table { font-size: 12px; }
  .split-grid .disparity-table th { font-size: 12px; padding: 10px 6px; }
  .split-grid .disparity-table td { padding: 12px 6px; }
  .split-grid .disparity-table a .svg-icon { display: none; }
  .course-list { gap: 18px; }
  .course-card { padding: 18px 14px; border-radius: 12px; }
  .course-card-header { gap: 16px; padding-bottom: 18px; }
  .course-title-block { flex-basis: 100%; }
  .course-name { font-size: 19px; gap: 6px; }
  .course-meta-tags { gap: 5px; margin-top: 8px; }
  .course-meta-tags .tag { font-size: 12px; padding: 2px 6px; }
  .course-stats-strip { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 14px 16px; min-width: 0; width: 100%; padding: 13px 14px; }
  .strip-label { font-size: 12px; }
  .strip-val { font-size: 20px; }
  .teachers-grid { grid-template-columns: 1fr; margin-top: 16px; gap: 12px; }
  .teacher-card { padding: 16px 13px; gap: 14px; }
  .teacher-dir-grid { grid-template-columns: 1fr; gap: 16px; }
  .teacher-dir-card { padding: 20px 16px; gap: 17px; }
  .teacher-name { font-size: 17px; }
  .teacher-score-badge { font-size: 27px; }
  .metrics-row { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 12px; padding: 12px; }
  .m-title { font-size: 12px; }
  .m-val { font-size: 16px; margin-top: 3px; }
  .toggle-students-btn { font-size: 13px; min-height: 46px; padding: 10px 11px; }
  .students-table-wrap { max-height: 320px; }
  .tc-head { min-height: 48px; padding: 12px 3px; }
  .tc-title { font-size: 14px; }
  .native-chart-wrapper { padding: 13px; margin-top: 16px; border-radius: 8px; }
  .chart-header-row { font-size: 13px; }
  .chart-zoom-btn { min-height: 44px; font-size: 13px; }
  .chart-legend-row { font-size: 12px; }
  .chart-modal-panel { margin: max(8px,env(safe-area-inset-top)) 8px max(8px,env(safe-area-inset-bottom)); border-radius: 12px; }
  .chart-modal-head { padding: 12px; flex-wrap: wrap; gap: 12px; }
  .chart-modal-title { flex-basis: 100%; font-size: 14px; }
  .chart-modal-tools { flex: 1; justify-content: flex-end; gap: 5px; }
  .chart-modal-btn { min-width: 44px; min-height: 44px; padding: 8px 9px; }
  .chart-modal-body { padding: 12px; }
  .chart-modal-hint { padding: 10px 12px; font-size: 12px; }
  footer { margin-top: 28px; padding-top: 18px; font-size: 12px; gap: 5px; }
}
@media (max-width: 370px) {
  .brand::after { font-size: 12px; }
  .breadcrumb > span:first-child, .breadcrumb-slash { display: none; }
  .period-chip { font-size: 12px; }
  .page-heading { flex-wrap: wrap; gap: 12px; }
  .page-heading .heading-count { margin-left: auto; }
  .kpi-card { padding: 14px; }
  .kpi-value { font-size: 25px; }
  .comparison-table tbody tr { padding: 15px; gap: 12px; }
  .teacher-result { gap: 5px; }
  .heading-link { padding: 8px 10px; }
  .section-meta { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}
@media print {
  .sidebar, .topbar, .toolbar, .heading-link, .pagination-wrap { display: none; }
  .workspace { margin: 0; }
  .container { padding: 0; max-width: none; }
  .course-card, .teacher-dir-card { content-visibility: visible; }
  .section-card, .course-card, .teacher-dir-card { break-inside: avoid; }
}