:root {
  color-scheme: light;
  --bg: #fcfcfb;
  --panel: #ffffff;
  --text: #0b0b0b;
  --text-2: #52514e;
  --muted: #74736e;
  --line: #e4e3df;
  --grid: #efeeea;
  --s1: #2a78d6;          /* rules / cascade */
  --s2: #eb6834;          /* teacher */
  --t-date: rgba(42, 120, 214, 0.16);
  --t-code: rgba(235, 104, 52, 0.18);
  --t-qty: rgba(27, 175, 122, 0.18);
  --t-date-b: #2a78d6;
  --t-code-b: #eb6834;
  --t-qty-b: #1baf7a;
  --accent: #1f1f1e;
  --accent-text: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #141413;
    --panel: #1a1a19;
    --text: #ffffff;
    --text-2: #c3c2b7;
    --muted: #9a998f;
    --line: #34332f;
    --grid: #262624;
    --s1: #3987e5;
    --s2: #d95926;
    --t-date: rgba(57, 135, 229, 0.26);
    --t-code: rgba(217, 89, 38, 0.28);
    --t-qty: rgba(25, 158, 112, 0.28);
    --t-date-b: #3987e5;
    --t-code-b: #d95926;
    --t-qty-b: #199e70;
    --accent: #f2f1ec;
    --accent-text: #141413;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #141413; --panel: #1a1a19; --text: #ffffff; --text-2: #c3c2b7; --muted: #9a998f; --line: #34332f; --grid: #262624;
  --s1: #3987e5; --s2: #d95926; --t-date: rgba(57, 135, 229, 0.26); --t-code: rgba(217, 89, 38, 0.28); --t-qty: rgba(25, 158, 112, 0.28);
  --t-date-b: #3987e5; --t-code-b: #d95926; --t-qty-b: #199e70; --accent: #f2f1ec; --accent-text: #141413;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); }
body { font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
code, .mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.88em; }
a { color: var(--s1); }
.wrap { max-width: 1180px; margin: 0 auto; padding: 24px 16px 64px; }
h1 { font-size: 30px; margin: 0 0 8px; letter-spacing: -0.01em; }
h2 { font-size: 18px; margin: 32px 0 6px; }
.lede { max-width: 860px; margin: 0 0 8px; }
.note, .help { color: var(--text-2); max-width: 860px; margin: 0 0 10px; font-size: 14px; }
section { min-width: 0; }

.controls { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 14px; margin: 20px 0 14px; position: sticky; top: 0;
  background: var(--bg); padding: 8px 0; z-index: 2; border-bottom: 1px solid var(--line); }
.controls input[type=range] { flex: 1 1 260px; min-width: 160px; accent-color: var(--s1); }
.controls output { font-variant-numeric: tabular-nums; min-width: 92px; color: var(--text-2); }
.speed { color: var(--text-2); font-size: 14px; display: flex; gap: 6px; align-items: center; }
button, select { font: inherit; font-size: 14px; border: 1px solid var(--line); background: var(--panel); color: var(--text);
  border-radius: 6px; padding: 6px 14px; cursor: pointer; }
button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); min-width: 84px; }
button:focus-visible, select:focus-visible, input:focus-visible, textarea:focus-visible { outline: 2px solid var(--s1); outline-offset: 2px; }

.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 10px; }
.kpi { border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; background: var(--panel); }
.kt { font-size: 12px; color: var(--text-2); }
.kv { font-size: 24px; font-weight: 600; margin: 2px 0; font-variant-numeric: tabular-nums; }
.ks { font-size: 12px; color: var(--muted); line-height: 1.35; }

.charts { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 10px; margin-top: 12px; }
.chart { margin: 0; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); padding: 10px 10px 4px; min-width: 0; }
.chart figcaption { font-size: 14px; font-weight: 600; }
.chart .sub { font-weight: 400; color: var(--muted); font-size: 12px; }
.chart svg { display: block; width: 100%; height: auto; }
.legend { display: flex; gap: 14px; font-size: 12px; color: var(--text-2); margin: 4px 0 2px; flex-wrap: wrap; }
.legend i { display: inline-block; width: 14px; height: 2px; vertical-align: middle; margin-right: 5px; border-radius: 1px; }
.axis text { fill: var(--muted); font-size: 10px; }
.tip { position: fixed; pointer-events: none; background: var(--panel); color: var(--text); border: 1px solid var(--line);
  border-radius: 6px; padding: 6px 8px; font-size: 12px; box-shadow: 0 2px 8px rgba(0,0,0,.12); z-index: 10; white-space: nowrap; }

.tablewrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); }
table { border-collapse: collapse; width: 100%; font-size: 13px; }
th, td { text-align: left; padding: 6px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-weight: 600; color: var(--text-2); font-size: 12px; background: var(--panel); }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
tr.current td { background: var(--grid); }
table.rules td.rx { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 12px; word-break: break-all; min-width: 260px; }
.st { font-size: 12px; white-space: nowrap; }
.st.on::before { content: "\25CF "; color: var(--s1); }
.st.off::before { content: "\25CB "; color: var(--muted); }
.st.cut::before { content: "\2715 "; color: var(--s2); }
.gate { font-size: 13px; color: var(--text-2); margin-top: 10px; }
.gate code { color: var(--text); }

.recent { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.recent li { border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; background: var(--panel); font-size: 14px; }
.recent .meta { font-size: 12px; color: var(--muted); margin-bottom: 2px; }
.by-rules { color: var(--s1); font-weight: 600; }
.by-teacher { color: var(--s2); font-weight: 600; }

mark { background: transparent; color: inherit; border-radius: 3px; padding: 0 2px; }
mark.DATETIME { background: var(--t-date); box-shadow: inset 0 -2px 0 var(--t-date-b); }
mark.CODE { background: var(--t-code); box-shadow: inset 0 -2px 0 var(--t-code-b); }
mark.QUANTITY { background: var(--t-qty); box-shadow: inset 0 -2px 0 var(--t-qty-b); }
mark sup { font-size: 9px; color: var(--text-2); margin-left: 3px; letter-spacing: 0.02em; }

.try textarea { width: 100%; font: inherit; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); color: var(--text); resize: vertical; }
.try .row { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0; }
.status { font-size: 14px; margin: 6px 0; }
.hl { border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; background: var(--panel); margin: 6px 0; line-height: 1.9; }
.hl:empty { display: none; }
.hl .lab { display: block; font-size: 12px; color: var(--muted); line-height: 1.4; }
.about ul { padding-left: 18px; max-width: 900px; }
.about li { margin: 4px 0; font-size: 14px; }
@media (max-width: 600px) { h1 { font-size: 24px; } .kv { font-size: 20px; } }
.rest { margin-top: 8px; } .rest summary { cursor: pointer; color: var(--text-2); font-size: 14px; margin-bottom: 6px; }
th.num { white-space: normal; min-width: 72px; }