:root {
  --bg: #f7f7f5; --panel: #ffffff; --text: #1d1d1b; --muted: #66665f; --line: #e2e1dc;
  --accent: #2f5fb3; --pass: #2e7d4f; --fail: #b3362f; --skip: #9a7a1c;
  --l0: #b3362f; --l1: #d0782f; --l2: #c9a227; --l3: #5c9e6e; --l4: #2f5fb3;
  --student: #7a4fb3; --claude: #d0782f;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #171716; --panel: #212120; --text: #ecebe6; --muted: #a3a29b; --line: #34332f;
    --accent: #7ea6ec; --pass: #6cc28d; --fail: #ec7f78; --skip: #e0c25c;
    --l0: #e0675f; --l1: #e89a55; --l2: #dcc15a; --l3: #7cc08e; --l4: #7ea6ec;
    --student: #b393e6; --claude: #e89a55;
  }
}
:root[data-theme="dark"] {
  --bg: #171716; --panel: #212120; --text: #ecebe6; --muted: #a3a29b; --line: #34332f;
  --accent: #7ea6ec; --pass: #6cc28d; --fail: #ec7f78; --skip: #e0c25c;
  --l0: #e0675f; --l1: #e89a55; --l2: #dcc15a; --l3: #7cc08e; --l4: #7ea6ec;
  --student: #b393e6; --claude: #e89a55;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; }
header { border-bottom: 1px solid var(--line); background: var(--panel); }
nav { max-width: 1100px; margin: 0 auto; padding: 12px 16px; display: flex; gap: 18px; flex-wrap: wrap; align-items: center; }
nav strong { margin-right: auto; }
nav a { color: var(--muted); text-decoration: none; }
nav a.on, nav a:hover { color: var(--accent); }
main { max-width: 1100px; margin: 0 auto; padding: 20px 16px 60px; }
h1 { font-size: 1.6rem; margin: 0 0 4px; }
h2 { font-size: 1.15rem; margin: 32px 0 10px; }
.sub { color: var(--muted); margin: 0 0 20px; }
.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; }
.kpi { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; }
.kpi b { display: block; font-size: 1.6rem; font-variant-numeric: tabular-nums; }
.kpi span { color: var(--muted); font-size: .85rem; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 14px; }
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 16px; }
.bar-row { display: grid; grid-template-columns: 150px 1fr 48px; gap: 8px; align-items: center; margin: 6px 0; font-size: .9rem; }
.bar-track { background: var(--line); border-radius: 4px; height: 16px; overflow: hidden; }
.bar { height: 100%; border-radius: 4px; background: var(--accent); }
.num { text-align: right; font-variant-numeric: tabular-nums; color: var(--muted); }
.controls { display: flex; gap: 10px; flex-wrap: wrap; margin: 10px 0; }
input, select { background: var(--panel); color: var(--text); border: 1px solid var(--line); border-radius: 6px; padding: 6px 10px; font: inherit; }
input[type=search] { flex: 1; min-width: 200px; }
.tablewrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); }
table { border-collapse: collapse; width: 100%; font-size: .88rem; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; position: sticky; top: 0; background: var(--panel); }
tr:last-child td { border-bottom: 0; }
.pill { display: inline-block; padding: 1px 8px; border-radius: 10px; font-size: .78rem; font-weight: 600; color: #fff; white-space: nowrap; }
.muted { color: var(--muted); }
a { color: var(--accent); }
q { font-style: italic; }
pre { white-space: pre-wrap; font-size: .8rem; background: var(--bg); padding: 8px; border-radius: 6px; margin: 6px 0 0; }
.legend { display: flex; gap: 14px; flex-wrap: wrap; font-size: .85rem; color: var(--muted); }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 5px; }
@media (max-width: 560px) { .bar-row { grid-template-columns: 100px 1fr 40px; } }