:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --muted: #6f6d68;
  --grid: #e1e0d9;
  --axis: #c3c2b7;
  --border: rgba(11, 11, 11, 0.1);
  --series-1: #2a78d6;
  --series-2: #eb6834;
  --negative: #e34948;
  --good: #0ca30c;
  --warning: #fab219;
  --critical: #d03b3b;
  --tag-bg: #f0efec;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --ink: #f0efec;
    --ink-2: #c3c2b7;
    --muted: #a3a198;
    --grid: #2c2c2a;
    --axis: #383835;
    --border: rgba(255, 255, 255, 0.1);
    --series-1: #3987e5;
    --series-2: #d95926;
    --negative: #e66767;
    --tag-bg: #383835;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font: 14px/1.5 system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

h1 { margin: 0; font-size: 22px; font-weight: 600; }
h2 { margin: 0; font-size: 14px; font-weight: 600; }
.card h2:not(:first-child) { margin-top: 12px; }

button {
  font: inherit;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--axis);
  border-radius: 6px;
  padding: 4px 12px;
  cursor: pointer;
}
button:disabled { opacity: 0.6; cursor: default; }

.page { display: grid; gap: 16px; max-width: 1280px; margin: 0 auto; padding: 20px 16px 48px; }
.top { display: flex; flex-wrap: wrap; gap: 8px 16px; align-items: flex-start; justify-content: space-between; }
.top-actions { display: flex; align-items: center; gap: 12px; }
.muted { color: var(--muted); font-size: 12px; }
.status { display: flex; align-items: center; gap: 6px; margin: 2px 0 0; color: var(--ink-2); overflow-wrap: anywhere; }
.dot { flex: none; width: 8px; height: 8px; border-radius: 50%; background: var(--muted); }
.status.running .dot { background: var(--good); }
.status.stalled .dot { background: var(--warning); }

.alert {
  margin: 0;
  padding: 8px 12px;
  border: 1px solid var(--critical);
  border-radius: 6px;
  background: var(--surface);
}

.tiles { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 190px), 1fr)); }
.tile, .card {
  min-width: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
}
.tile { display: grid; gap: 2px; align-content: start; }
.tile span, .tile small { color: var(--muted); font-size: 12px; }
.tile strong { font-size: 26px; font-weight: 500; }

.card { display: grid; gap: 6px; align-content: start; }
.card-head { display: flex; flex-wrap: wrap; gap: 8px 16px; align-items: center; justify-content: space-between; }
.controls { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; min-width: 0; }
select {
  font: inherit;
  font-size: 12px;
  max-width: 100%;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--axis);
  border-radius: 6px;
  padding: 4px 8px;
}
.segments { display: flex; }
.segments button { border-radius: 0; margin-left: -1px; padding: 4px 10px; font-size: 12px; }
.segments button:first-child { border-radius: 6px 0 0 6px; margin-left: 0; }
.segments button:last-child { border-radius: 0 6px 6px 0; }
.segments button[aria-pressed="true"] { background: var(--tag-bg); font-weight: 600; }
.stats { display: grid; gap: 8px 16px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 130px), 1fr)); margin: 4px 0; }
.stats div { display: grid; }
.stats span { color: var(--muted); font-size: 12px; }
.stats strong { font-size: 18px; font-weight: 500; }
.stats small { color: var(--muted); font-size: 12px; overflow-wrap: anywhere; }
.stats .warn strong::before { content: "⚠ "; color: var(--warning); }
.host-stats { grid-template-columns: repeat(auto-fit, minmax(min(100%, 170px), 1fr)); }
.host-stats div { align-content: start; }
.host-chart { display: grid; gap: 6px; min-width: 0; }
.grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 420px), 1fr)); }
.note { margin: 0; color: var(--muted); font-size: 12px; }

.scroll { overflow: auto; max-height: 420px; min-width: 0; }
.scroll.short { max-height: 220px; }
table { width: 100%; border-collapse: collapse; font-size: 12px; font-variant-numeric: tabular-nums; }
th {
  position: sticky;
  top: 0;
  background: var(--surface);
  color: var(--muted);
  font-weight: 500;
  text-align: left;
  white-space: nowrap;
  padding: 4px 8px;
  border-bottom: 1px solid var(--axis);
}
td { padding: 4px 8px; border-bottom: 1px solid var(--grid); white-space: nowrap; }
.num { text-align: right; }
.wrap { white-space: normal; min-width: 180px; overflow-wrap: anywhere; }
.empty { color: var(--muted); padding: 12px 8px; }
.tag { display: inline-block; padding: 0 6px; border-radius: 4px; background: var(--tag-bg); color: var(--ink); }
.tag.warn::before { content: "⚠ "; }
.pause-detail { display: block; white-space: pre-line; min-width: 170px; font-variant-numeric: tabular-nums; }

.chart { position: relative; height: 200px; min-width: 0; }
.chart svg { display: block; width: 100%; height: 100%; }
.chart.tall { height: 260px; }
.chart .empty { display: grid; place-items: center; height: 100%; }
.legend { display: flex; flex-wrap: wrap; gap: 12px; color: var(--ink-2); font-size: 12px; }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 6px; }
.fill-1 { background: var(--series-1); }
.fill-2 { background: var(--series-2); }
.fill-3 { background: var(--muted); }

.grid-line { stroke: var(--grid); stroke-width: 1; }
.base-line { stroke: var(--axis); stroke-width: 1; }
.axis { fill: var(--muted); font-size: 11px; font-variant-numeric: tabular-nums; }
.end-label { fill: var(--ink); font-size: 12px; font-variant-numeric: tabular-nums; }
.line { fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.stroke-1 { stroke: var(--series-1); }
.stroke-2 { stroke: var(--series-2); }
.stroke-3 { stroke: var(--muted); }
.dot-1, .dot-2 { stroke: var(--surface); stroke-width: 2; }
.dot-1 { fill: var(--series-1); }
.dot-2 { fill: var(--series-2); }
.bar-up { fill: var(--series-1); }
.bar-down { fill: var(--negative); }
.cross { stroke: var(--axis); stroke-width: 1; }
.hit { fill: transparent; }

.spread-toolbar { margin-top: 8px; }
.analysis-runs { margin: 8px 0 4px; }
.button-link { font-size: 12px; color: var(--ink); text-decoration: none; border: 1px solid var(--axis); border-radius: 6px; padding: 4px 10px; background: var(--surface); }
.button-link:hover { background: var(--tag-bg); }
.analysis-params { display: grid; gap: 8px 12px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 120px), 1fr)); margin: 4px 0 8px; }
.analysis-params label { display: grid; gap: 2px; color: var(--muted); font-size: 12px; }
.analysis-params input { font: inherit; font-size: 12px; color: var(--ink); background: var(--surface); border: 1px solid var(--axis); border-radius: 6px; padding: 4px 8px; min-width: 0; }
th.sortable { cursor: pointer; user-select: none; }
tr.clickable { cursor: pointer; }
tr.clickable:hover td, tr.selected td { background: var(--tag-bg); }
.fill-negative { background: var(--negative); }
.analysis-band { fill: var(--muted); opacity: 0.28; stroke: none; }
.analysis-baseline { stroke-width: 1.5; }
.analysis-open { fill: none; stroke: var(--series-2); stroke-width: 1; stroke-dasharray: 5 4; }
.analysis-stop { fill: none; stroke: var(--negative); stroke-width: 1; stroke-dasharray: 2 4; }
.analysis-loss { fill: var(--negative); stroke: var(--surface); stroke-width: 2; }
#analysis-detail h3 { margin: 0 0 4px; font-size: 14px; }
.chart.spread-chart { height: auto; min-height: 284px; }
.spread-chart svg { height: auto; }
.spread-chart .provisional { stroke-dasharray: 4 4; }
.spread-sample { fill: var(--muted); }
.spread-live { fill: var(--surface); stroke: var(--muted); stroke-width: 2; }
.trade-band { fill: var(--series-1); opacity: 0.045; }
.trade-guide { stroke: var(--axis); stroke-width: 1; stroke-dasharray: 3 4; }
.trade-halo { fill: var(--series-1); opacity: 0.13; }
.trade-point-label { fill: var(--ink); font-size: 12px; font-variant-numeric: tabular-nums; }
.trade-point {
  position: absolute;
  transform: translate(-50%, -50%);
  width: 32px;
  height: 32px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
}
.trade-point:hover { background: color-mix(in srgb, var(--series-1) 8%, transparent); }
.trade-open-key, .trade-close-key {
  display: inline-block;
  width: 8px;
  height: 8px;
  flex: none;
  background: var(--series-1);
  border-radius: 50%;
}
.legend .trade-open-key { border-radius: 50%; }
.trade-close-key, .legend .trade-close-key { background: var(--series-2); border-radius: 1px; transform: rotate(45deg); }
.trade-detail { border-top: 1px solid var(--grid); padding-top: 16px; margin-top: 8px; min-width: 0; }
.trade-head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; align-items: flex-start; }
.trade-head > div:first-child { min-width: 0; flex: 1 1 260px; }
.trade-head h3 { margin: 0; font-size: 14px; font-weight: 600; }
.trade-picker { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 8px; margin: 6px 0; color: var(--muted); font-size: 12px; }
.trade-picker select { min-width: 0; max-width: 100%; }
.trade-pnl { text-align: right; flex: none; }
.trade-pnl span { display: block; color: var(--muted); font-size: 12px; }
.trade-pnl strong { display: block; font-size: 22px; font-weight: 500; font-variant-numeric: tabular-nums; }
.trade-pnl .positive { color: var(--good); }
.trade-pnl .negative { color: var(--negative); }
.trade-events { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.trade-events button { flex: 1 1 140px; display: flex; align-items: center; gap: 8px; padding: 8px 12px; border-color: var(--grid); text-align: left; }
.trade-events button[aria-pressed="true"] { background: var(--tag-bg); border-color: var(--axis); }
.trade-events strong { margin-left: auto; font-weight: 500; font-size: 12px; font-variant-numeric: tabular-nums; }
.trade-event-head { display: flex; flex-wrap: wrap; gap: 4px 16px; justify-content: space-between; align-items: baseline; margin-top: 16px; }
.trade-event-head strong { font-weight: 500; font-size: 13px; }
.trade-metrics { display: grid; grid-template-columns: 1fr 1fr 1.3fr; gap: 12px; margin: 14px 0; }
.trade-metrics span { display: block; color: var(--muted); font-size: 12px; }
.trade-metrics strong { display: block; font-size: 16px; font-weight: 500; font-variant-numeric: tabular-nums; margin-top: 3px; }
.trade-prices { margin: 8px 0; }
.trade-prices th, .trade-prices td { padding: 6px 8px; text-align: right; }
.trade-prices th:first-child, .trade-prices td:first-child { text-align: left; padding-left: 0; }
.trade-prices th:last-child, .trade-prices td:last-child { padding-right: 0; }
.trade-prices small { display: none; }
.trade-footer { display: flex; flex-wrap: wrap; gap: 6px 20px; margin-top: 12px; color: var(--muted); font-size: 12px; }
.trade-footer b { font-weight: 400; color: var(--ink); font-variant-numeric: tabular-nums; margin-left: 4px; }

@media (max-width: 600px) {
  .trade-pnl { text-align: left; }
  .trade-metrics { grid-template-columns: 1fr 1fr; }
  .trade-metrics > div:last-child { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 4px 12px; align-items: baseline; }
  .trade-prices thead { display: none; }
  .trade-prices tbody tr { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 12px; padding: 12px 0; border-bottom: 1px solid var(--grid); }
  .trade-prices td { text-align: left; white-space: normal; overflow-wrap: anywhere; border: 0; padding: 0; }
  .trade-prices td:first-child { grid-column: 1 / -1; }
  .trade-prices small { display: block; color: var(--muted); font-size: 11px; margin-bottom: 2px; }
}

@media (pointer: coarse) {
  .trade-point { width: 44px; height: 44px; }
  .spread-toolbar button, .trade-events button { min-height: 44px; }
}

.tip {
  position: fixed;
  z-index: 10;
  max-width: 280px;
  pointer-events: none;
  padding: 6px 8px;
  background: var(--surface);
  border: 1px solid var(--axis);
  border-radius: 6px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  white-space: pre-line;
}

.login-page { display: grid; place-items: center; min-height: 100vh; padding: 16px; }
.login-card {
  display: grid;
  gap: 14px;
  width: min(100%, 340px);
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.login-card label { display: grid; gap: 4px; color: var(--ink-2); font-size: 12px; }
.login-card input {
  font: inherit;
  color: var(--ink);
  background: var(--page);
  border: 1px solid var(--axis);
  border-radius: 6px;
  padding: 8px 10px;
}
.login-card button { padding: 8px; background: var(--series-1); border-color: var(--series-1); color: #fff; }
.login-error { margin: 0; color: var(--critical); font-size: 12px; }

@media (prefers-color-scheme: dark) {
  .login-error { color: var(--negative); }
}