:root {
  color-scheme: light;
  font-family: 'Instrument Sans', 'Noto Sans TC', 'Microsoft JhengHei', sans-serif;
  --background: #f4f6f1;
  --card: #ffffff;
  --card-subtle: #e7efe8;
  --foreground: #1e2925;
  --muted: #4b5d55;
  --border: #c5d1c8;
  --accent: #1d5b47;
  --accent-foreground: #ffffff;
  --masthead-bg: #16332a;
  --masthead-fg: #f8fafc;
  --fine: #0284c7;
  --coarse: #b45309;
  --change: #6d28d9;
  --increase: #15803d;
  --decrease: #b91c1c;
  --row-hover: #f0f6f2;
  --row-active: #e2efe7;
  --canvas-surface: #020617;
  color: var(--foreground);
  background: var(--background);
}

[data-theme="dark"] {
  color-scheme: dark;
  --background: #0b1116;
  --card: #131c24;
  --card-subtle: #182b27;
  --foreground: #e6edf3;
  --muted: #9fb0be;
  --border: #2a3947;
  --accent: #34d399;
  --accent-foreground: #052e16;
  --masthead-bg: #080d12;
  --masthead-fg: #f1f5f9;
  --fine: #38bdf8;
  --coarse: #f59e0b;
  --change: #a78bfa;
  --increase: #4ade80;
  --decrease: #f87171;
  --row-hover: #1b2834;
  --row-active: #1a332b;
  --canvas-surface: #020617;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-size: 14px;
  line-height: 1.5;
  color: var(--foreground);
  background: var(--background);
}
[hidden] { display: none !important; }
.wrap { width: min(1240px, calc(100% - 36px)); margin-inline: auto; }

.masthead {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--masthead-bg);
  color: var(--masthead-fg);
  border-bottom: 1px solid var(--border);
}
.mast-inner {
  min-height: 64px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  padding-block: 10px;
}
.brand { font-weight: 800; letter-spacing: .14em; font-size: 15px; }
.model-fields { margin-left: auto; display: flex; flex-wrap: wrap; gap: 8px 12px; align-items: center; }
.model-fields label { display: flex; align-items: center; gap: 6px; white-space: nowrap; font-size: 14px; }

main { padding-block: 24px 32px; }
h1 { margin: 0 0 16px; font-size: clamp(1.6rem, 3.6vw, 2.4rem); letter-spacing: -.03em; }
h2 { margin: 0; font-size: 1.15rem; color: var(--foreground); }

button, select {
  min-height: 40px;
  padding: 5px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: inherit;
  font-size: 14px;
  color: var(--foreground);
  background: var(--card);
}
button { cursor: pointer; font-weight: 600; transition: border-color .15s, background-color .15s; }
button:hover:not(:disabled) { border-color: var(--accent); }
button[aria-pressed="true"], #reset {
  background: var(--accent);
  color: var(--accent-foreground);
  border-color: var(--accent);
}
button:disabled { opacity: .48; cursor: default; }
#theme-toggle {
  min-height: 36px;
  background: rgba(255, 255, 255, 0.12);
  color: var(--masthead-fg);
  border-color: rgba(255, 255, 255, 0.28);
}
[data-theme="dark"] #theme-toggle {
  background: var(--card);
  color: var(--foreground);
  border-color: var(--border);
}
:focus-visible { outline: 3px solid var(--change); outline-offset: 2px; }

.controls { border-block: 1px solid var(--border); padding: 14px 0 10px; }
.scenarios { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.controls .scenarios + .scenarios { margin-top: 10px; }
.quick-angles button.is-active {
  background: var(--card-subtle);
  border-color: var(--accent);
  color: var(--foreground);
}
.plate-badge {
  display: inline-flex;
  align-items: center;
  padding: 5px 10px;
  border-radius: 999px;
  background: var(--card-subtle);
  border: 1px solid var(--border);
  font-size: 13px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

input[type="range"] {
  accent-color: var(--accent);
  width: clamp(110px, 24vw, 250px);
  min-height: 30px;
}
output, .metric strong, td, th { font-variant-numeric: tabular-nums; }
.note { color: var(--muted); font-size: 13px; line-height: 1.55; margin: 8px 0; }

.results {
  display: grid;
  grid-template-columns: 1.35fr repeat(5, 1fr);
  gap: 10px;
  margin: 18px 0 22px;
}
.metric {
  min-width: 0;
  min-height: 104px;
  display: grid;
  gap: 5px;
  align-content: start;
  padding: 13px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--card);
}
.metric span, .metric small { color: var(--muted); font-size: 13px; line-height: 1.35; }
.metric strong { font-size: clamp(1.05rem, 1.8vw, 1.35rem); color: var(--foreground); }
.metric .metric-sub { font-size: 12px; }
.verdict { background: var(--card-subtle); border-color: var(--accent); }

.delta-up { color: var(--increase); font-weight: 700; }
.delta-down { color: var(--decrease); font-weight: 700; }
.delta-flat { color: var(--muted); font-weight: 600; }

.motion-bar, .record { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
.views { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
figure {
  margin: 0;
  border: 1px solid var(--border);
  overflow: hidden;
  border-radius: 12px;
  background: var(--card);
}
figcaption {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}
figcaption span { margin-left: 8px; color: var(--muted); font-size: 13px; }

.view-stack { display: grid; gap: 10px; padding: 10px; background: var(--background); }
.view-panel {
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  background: var(--card);
}
.view-panel-title {
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 700;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
  background: var(--card-subtle);
}
.side-canvas {
  display: block;
  width: 100%;
  height: 360px;
  background: var(--canvas-surface);
}
.traj-svg {
  width: 100%;
  max-height: 270px;
  display: block;
  background: var(--card);
}
.traj-svg text {
  fill: var(--foreground);
  font-family: 'Noto Sans TC', 'Microsoft JhengHei', sans-serif;
  font-size: 12px;
}

.legend { display: flex; flex-wrap: wrap; gap: 16px; font-size: 13px; margin-top: 10px; }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 100%; margin-right: 6px; }
.fine { background: var(--fine); }
.coarse { background: var(--coarse); }
.change { background: var(--change); }

.analysis-tables { display: grid; gap: 16px; margin-top: 22px; }
.table-card {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--card);
  padding: 14px;
}
.table-head { margin-bottom: 8px; }
.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  min-width: 760px;
}
th, td {
  padding: 9px 10px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
th {
  color: var(--muted);
  font-weight: 700;
  font-size: 12px;
  white-space: nowrap;
  background: var(--card);
}
tbody tr.interactive-row { cursor: pointer; transition: background-color .12s; }
tbody tr.interactive-row:hover { background: var(--row-hover); }
tbody tr.is-current { background: var(--row-active); outline: 2px solid var(--accent); outline-offset: -2px; }
tbody tr.is-disabled { opacity: .5; cursor: not-allowed; }
.tag-pill {
  display: inline-block;
  margin-left: 6px;
  padding: 2px 7px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  background: var(--card-subtle);
  color: var(--foreground);
  border: 1px solid var(--border);
}

.record { margin-top: 20px; border-top: 1px solid var(--border); padding-top: 14px; font-size: 14px; }
footer { margin-top: 14px; color: var(--muted); font-size: 12px; }

@media (max-width: 1020px) {
  .results { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 720px) {
  .wrap { width: calc(100% - 24px); }
  .results { grid-template-columns: repeat(2, 1fr); }
  .verdict { grid-column: 1 / -1; min-height: 0; }
  .views { grid-template-columns: 1fr; }
  .side-canvas { height: 320px; }
}
@media (max-width: 440px) {
  .results { grid-template-columns: 1fr; }
  .model-fields { width: 100%; margin-left: 0; }
}