:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --muted: #898781;
  --grid: #e1e0d9;
  --axis: #c3c2b7;
  --border: rgba(11, 11, 11, 0.10);
  --accent: #2a78d6;
  --sun-0: #efeee9;
  --sun-1: #fbe3d6;
  --sun-2: #f6b896;
  --sun-3: #f08c5c;
  --sun-4: #eb6834;
  --sun-5: #c24d1f;
  --sun-6: #8f3510;
  --scene-bg: #dfe6ee;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --ink: #ffffff;
    --ink-2: #c3c2b7;
    --muted: #898781;
    --grid: #2c2c2a;
    --axis: #383835;
    --border: rgba(255, 255, 255, 0.10);
    --accent: #3987e5;
    --sun-0: #262624;
    --sun-1: #3a2a22;
    --sun-2: #6b3a22;
    --sun-3: #a2491f;
    --sun-4: #d95926;
    --sun-5: #f08c5c;
    --sun-6: #f7b896;
    --scene-bg: #1c2128;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #0d0d0d;
  --surface: #1a1a19;
  --ink: #ffffff;
  --ink-2: #c3c2b7;
  --muted: #898781;
  --grid: #2c2c2a;
  --axis: #383835;
  --border: rgba(255, 255, 255, 0.10);
  --accent: #3987e5;
  --sun-0: #262624;
  --sun-1: #3a2a22;
  --sun-2: #6b3a22;
  --sun-3: #a2491f;
  --sun-4: #d95926;
  --sun-5: #f08c5c;
  --sun-6: #f7b896;
  --scene-bg: #1c2128;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--page);
  color: var(--ink);
  font: 14px/1.5 system-ui, -apple-system, "PingFang TC", "Noto Sans TC", "Segoe UI", sans-serif;
}
.app { display: grid; grid-template-columns: minmax(0, 1fr) 400px; height: 100vh; }
.stage { position: relative; min-height: 0; background: var(--scene-bg); }
#viewport { position: absolute; inset: 0; }
#viewport canvas { display: block; }
.stage-tools { position: absolute; top: 12px; left: 12px; display: flex; gap: 6px; }
.sun-readout {
  position: absolute; left: 12px; bottom: 12px; padding: 8px 12px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
  font-variant-numeric: tabular-nums; color: var(--ink-2);
}
.sun-readout b { color: var(--ink); font-weight: 600; }
.compass-label { font: 600 13px system-ui, sans-serif; color: var(--ink); text-shadow: 0 0 3px var(--surface); }
.b1-label {
  font: 600 12px system-ui, sans-serif; color: #fff; background: #eb6834;
  padding: 2px 8px; border-radius: 999px;
}

.panel { overflow-y: auto; background: var(--surface); border-left: 1px solid var(--border); padding: 20px 20px 40px; }
.panel-head h1 { font-size: 18px; margin: 0; }
.sub { margin: 4px 0 0; color: var(--ink-2); }
.group { padding: 16px 0; border-top: 1px solid var(--grid); }
.panel-head + .group { border-top: 0; }
h2 { font-size: 14px; margin: 0 0 10px; }
.h2row { display: flex; justify-content: space-between; align-items: baseline; }
.muted { color: var(--muted); font-size: 12px; }
.field { display: grid; gap: 6px; margin-bottom: 10px; color: var(--ink-2); }
.field output { color: var(--ink); font-weight: 600; font-variant-numeric: tabular-nums; }
.row { display: flex; gap: 8px; align-items: center; }
.row input[type="range"] { flex: 1; }
input[type="range"] { accent-color: var(--accent); width: 100%; }
input[type="date"] {
  font: inherit; color: var(--ink); background: var(--page);
  border: 1px solid var(--border); border-radius: 8px; padding: 6px 8px;
}
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.chip {
  font: inherit; font-size: 13px; color: var(--ink); background: var(--surface);
  border: 1px solid var(--border); border-radius: 999px; padding: 4px 12px; cursor: pointer;
}
.chip:hover { background: var(--page); }
.chip.is-on, .chip[aria-pressed="true"] { border-color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); }
.check { display: flex; gap: 8px; align-items: flex-start; color: var(--ink-2); }
.note { color: var(--muted); font-size: 12px; margin: 12px 0 0; }

.tiles { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin-bottom: 12px; }
.tile { border: 1px solid var(--border); border-radius: 10px; padding: 8px 10px; }
.tile .label { color: var(--ink-2); font-size: 12px; display: flex; gap: 6px; align-items: center; }
.tile .value { font-size: 22px; font-weight: 600; }
.tile .value small { font-size: 12px; font-weight: 400; color: var(--ink-2); margin-left: 2px; }
.tile .when { font-size: 12px; color: var(--muted); font-variant-numeric: tabular-nums; }
.dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }

.chart svg { display: block; width: 100%; height: auto; overflow: visible; }
.chart text { fill: var(--muted); font-size: 11px; font-variant-numeric: tabular-nums; }
.chart .row-label { fill: var(--ink-2); }
.chart .now { stroke: var(--ink); stroke-width: 1.5; }
.chart .gridline { stroke: var(--grid); stroke-width: 1; }

.heat-wrap { position: relative; }
#heat { width: 100%; height: 364px; display: block; cursor: crosshair; }
.legend-ramp { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--muted); margin: 8px 0; }
.ramp {
  flex: 1; height: 8px; border-radius: 4px;
  background: linear-gradient(90deg, var(--sun-0), var(--sun-1), var(--sun-2), var(--sun-3), var(--sun-4), var(--sun-5), var(--sun-6));
}
details summary { cursor: pointer; color: var(--ink-2); margin: 6px 0; }
table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; font-size: 12px; }
th, td { text-align: right; padding: 4px 6px; border-bottom: 1px solid var(--grid); }
th:first-child, td:first-child { text-align: left; }
th { color: var(--ink-2); font-weight: 600; }

.tooltip {
  position: fixed; z-index: 10; pointer-events: none; padding: 6px 10px;
  background: var(--surface); color: var(--ink); border: 1px solid var(--border);
  border-radius: 8px; font-size: 12px; box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  font-variant-numeric: tabular-nums; white-space: nowrap;
}

@media (max-width: 860px) {
  .app { grid-template-columns: 1fr; grid-template-rows: 55vh auto; height: auto; }
  .stage { height: 55vh; }
  .panel { border-left: 0; padding: 16px; }
}