:root {
  --bg: #050505; --panel: #0d0d0c; --line: #2a2614; --amber: #ffb340; --amber-dim: #a8782c;
  --text: #f2e6c9; --muted: #8a8170; --up: #3ddc84; --down: #ff5c4d; --key: #e8d15a; --cyan: #6fd3ff;
  --mono: 'IBM Plex Mono', 'Noto Sans SC', ui-monospace, monospace; --cond: 'IBM Plex Sans Condensed', 'Noto Sans SC', 'Arial Narrow', sans-serif;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); }
body { font: 13px/1.35 var(--mono); font-variant-numeric: tabular-nums; min-height: 100vh; display: flex; flex-direction: column; }
a { color: var(--cyan); text-decoration: none; }
a:hover { text-decoration: underline; }
kbd { font: 600 11px var(--mono); color: #111; background: var(--key); padding: 0 4px; margin-right: 6px; border-radius: 1px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.up { color: var(--up); } .down { color: var(--down); } .flat { color: var(--muted); }

.lang { display: flex; gap: 2px; } .lang a { color: var(--muted); font: 600 12px var(--cond); padding: 3px 7px; border: 1px solid #2b271a; }
.lang a[aria-current] { color: #000; background: var(--amber); border-color: var(--amber); }
.lang a:lang(zh) { font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif; }
.topbar { display: grid; grid-template-columns: auto 1fr auto auto auto; gap: 18px; align-items: center; padding: 6px 12px; border-bottom: 1px solid var(--line); background: #000; }
.brand { display: flex; align-items: center; gap: 8px; color: var(--amber); font: 600 20px/1 var(--cond); letter-spacing: .14em; }
.brand svg { width: 34px; height: 20px; fill: var(--amber); stroke: var(--amber); stroke-width: 2.4; }
.cmd { display: flex; align-items: center; background: #111; border: 1px solid #3b3520; max-width: 420px; }
.cmd .prompt { color: var(--amber); padding: 0 6px 0 8px; }
.cmd input { flex: 1; background: transparent; border: 0; color: var(--amber); font: 600 14px var(--mono); padding: 5px 0; text-transform: uppercase; outline: none; }
.cmd button { background: var(--amber); color: #000; border: 0; font: 600 12px var(--mono); padding: 6px 14px; cursor: pointer; }
.clock { color: var(--text); font-size: 13px; } .clock b { color: var(--amber); font-size: 15px; } .clock .tz { color: var(--muted); }
.session { font: 600 12px var(--mono); padding: 3px 8px; border: 1px solid currentColor; }
.session.open { color: var(--up); } .session.closed { color: var(--down); }

.fkeys { display: flex; flex-wrap: wrap; gap: 2px; padding: 4px 12px; background: #0a0a0a; border-bottom: 1px solid var(--line); }
.fkeys a { color: var(--text); padding: 3px 10px 3px 4px; font: 600 12px var(--cond); letter-spacing: .08em; }
.fkeys a[aria-current] { background: #1d1a10; color: var(--amber); }

.tape { overflow: hidden; border-bottom: 1px solid var(--line); background: #080806; white-space: nowrap; }
.tape-track { display: inline-flex; gap: 34px; padding: 5px 0; animation: tape 60s linear infinite; }
.tape-track span { color: var(--text); } .tape-track b { color: var(--amber); font-weight: 600; } .tape-track i { font-style: normal; }
.tape:hover .tape-track { animation-play-state: paused; }
@keyframes tape { from { transform: translateX(0); } to { transform: translateX(-50%); } }
@media (prefers-reduced-motion: reduce) { .tape-track { animation: none; } }

.grid { flex: 1; display: grid; gap: 1px; background: var(--line); grid-template-columns: 1.9fr 1fr 1fr; grid-template-rows: auto auto; grid-template-areas: "quotes index wire" "curve heat depth"; }
.panel { background: var(--panel); padding: 8px 10px 10px; min-width: 0; container-type: inline-size; }
.panel h2 { margin: 0 0 8px; font: 600 12px/1.2 var(--cond); letter-spacing: .1em; text-transform: uppercase; color: var(--amber); display: flex; align-items: center; gap: 4px; }
.panel h2 .unit { margin-left: auto; color: var(--muted); font-weight: 500; text-transform: none; letter-spacing: 0; }
.quotes { grid-area: quotes; } .index { grid-area: index; } .wire { grid-area: wire; } .curve { grid-area: curve; } .heat { grid-area: heat; } .depth { grid-area: depth; }

table { border-collapse: collapse; width: 100%; }
th { color: var(--muted); font: 500 11px var(--cond); text-transform: uppercase; letter-spacing: .06em; text-align: left; padding: 3px 6px; border-bottom: 1px solid var(--line); }
td { padding: 4px 6px; border-bottom: 1px solid #17150d; white-space: nowrap; }
.n { text-align: right; }
.quotes tbody tr { cursor: pointer; } .quotes tbody tr:hover { background: #17140b; }
.quotes tbody tr.sel { background: #262011; } .quotes tbody td:first-child { color: var(--amber); font-weight: 600; }
.scroll { overflow-x: auto; }

.big { display: flex; align-items: baseline; gap: 12px; }
.big #emx-value { font: 600 44px/1 var(--cond); color: var(--amber); letter-spacing: .02em; }
.big .chg { font-size: 15px; font-weight: 600; }
.spark { width: 100%; height: 90px; margin: 6px 0; background: linear-gradient(#0000 0 24%, #1a170d 24% 25%, #0000 25% 49%, #1a170d 49% 50%, #0000 50% 74%, #1a170d 74% 75%, #0000 75%); }
.spark polyline { fill: none; stroke: var(--amber); stroke-width: 1.6; vector-effect: non-scaling-stroke; }
.kv { display: grid; grid-template-columns: 1fr 1fr; gap: 4px 12px; margin: 0; }
.kv div { display: flex; justify-content: space-between; border-bottom: 1px dotted #2b271a; padding: 2px 0; }
.kv dt { color: var(--muted); } .kv dd { margin: 0; }

#curve { width: 100%; height: auto; }
#curve text { fill: var(--muted); font: 10px var(--mono); }
#curve .g { stroke: #221f12; }
#curve polyline { fill: none; stroke-width: 2; }
#curve .cst { stroke: var(--amber); } #curve .inl { stroke: var(--cyan); }
#curve .cst-t { fill: var(--amber); } #curve .inl-t { fill: var(--cyan); }

.heatmap th, .heatmap td { text-align: center; }
.heatmap td { font-weight: 600; color: #fff; }
.heatmap td.up { background: rgb(61 220 132 / calc(var(--a) * .55)); }
.heatmap td.down { background: rgb(255 92 77 / calc(var(--a) * .55)); }
.heatmap td.flat { color: var(--muted); }

.wire ol { list-style: none; margin: 0; padding: 0; max-height: 330px; overflow: auto; }
.wire li { padding: 5px 0; border-bottom: 1px solid #1b1910; font: 500 12px/1.35 var(--cond); letter-spacing: .02em; }
.wire time { color: var(--amber); font-family: var(--mono); margin-right: 6px; }

.ladder td { text-align: center; }
.ladder .ask td:nth-child(2) { color: var(--down); } .ladder .bid td:nth-child(2) { color: var(--up); }
.ladder .ask td:first-child { background: linear-gradient(90deg, #0000, #ff5c4d22); }
.ladder .bid td:last-child { background: linear-gradient(90deg, #3ddc8422, #0000); }
.ladder .mid td { color: var(--amber); font-weight: 600; background: #1d1a10; }

.statusbar { display: flex; flex-wrap: wrap; gap: 6px 22px; padding: 6px 12px; border-top: 1px solid var(--line); background: #000; color: var(--muted); font-size: 11px; }

/* Document pages (methodology, desk, terms) */
.doc { flex: 1; display: grid; grid-template-columns: 220px minmax(0, 860px); gap: 1px; background: var(--line); }
.doc aside, .doc article { background: var(--panel); padding: 16px 18px; }
.doc aside a { display: block; padding: 4px 0; color: var(--text); font: 600 12px var(--cond); letter-spacing: .08em; text-transform: uppercase; }
.doc aside a[aria-current] { color: var(--amber); }
.doc h1 { font: 600 26px/1.15 var(--cond); color: var(--amber); letter-spacing: .04em; margin: 0 0 4px; text-transform: uppercase; }
.doc .meta { color: var(--muted); margin: 0 0 18px; }
.doc h2 { font: 600 14px var(--cond); letter-spacing: .1em; text-transform: uppercase; color: var(--amber); border-bottom: 1px solid var(--line); padding-bottom: 4px; margin: 22px 0 8px; }
.doc p, .doc li { max-width: 76ch; color: var(--text); }
.doc table { margin: 8px 0 4px; }
.doc .formula { background: #000; border: 1px solid var(--line); padding: 10px 12px; color: var(--amber); white-space: pre-wrap; }
.doc .fine { color: var(--muted); font-size: 12px; }

@media (max-width: 1100px) {
  .grid { grid-template-columns: 1fr 1fr; grid-template-areas: "quotes quotes" "index wire" "curve heat" "depth depth"; }
}
@media (max-width: 680px) {
  .topbar { grid-template-columns: 1fr auto; }
  .cmd { grid-column: 1 / -1; max-width: none; order: 3; }
  .grid { grid-template-columns: 1fr; grid-template-areas: "index" "quotes" "wire" "curve" "heat" "depth"; }
  .doc { grid-template-columns: 1fr; }
  .doc aside { display: flex; flex-wrap: wrap; gap: 4px 14px; }
}
@container (max-width: 640px) { .quotes th:nth-child(9), .quotes td:nth-child(9) { display: none; } }
@container (max-width: 480px) { .quotes th:nth-child(n+6), .quotes td:nth-child(n+6) { display: none; } }