/* Solar Shadow Visualizer — layout & theme */
:root {
  --bg: #0c101c;
  --panel: #131a2b;
  --panel-2: #182136;
  --line: rgba(255, 255, 255, 0.08);
  --text: #ece7da;
  --muted: rgba(236, 231, 218, 0.55);
  --accent: #ffd34d;
  --accent-2: #5fb8ff;
  --danger: #ff5f6d;
  --radius: 10px;
  --topbar-h: 52px;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif;
  overflow: hidden;
}

/* ---- top bar ---- */
#topbar {
  height: var(--topbar-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 14px;
  background: linear-gradient(180deg, #141b2e, #101626);
  border-bottom: 1px solid var(--line);
  position: relative; z-index: 20;
}
.brand { display: flex; align-items: center; gap: 10px; min-width: 0; }
.brand-mark { font-size: 22px; filter: drop-shadow(0 0 6px rgba(255, 211, 77, 0.6)); }
#topbar h1 {
  font-size: 15px; font-weight: 650; letter-spacing: 0.02em;
  margin: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.topbar-right { display: flex; gap: 8px; }

.chip {
  background: var(--panel-2); color: var(--text);
  border: 1px solid var(--line); border-radius: 999px;
  padding: 7px 13px; font-size: 13px; cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  min-height: 36px;
}
.chip:hover { background: #202b47; border-color: rgba(255, 255, 255, 0.2); }

/* ---- layout ---- */
#layout {
  display: flex;
  height: calc(100% - var(--topbar-h));
}
#viewport { position: relative; flex: 1 1 auto; min-width: 0; }
#scene-container { position: absolute; inset: 0; }
#scene-container canvas { display: block; touch-action: none; }

/* ---- HUD ---- */
#hud {
  position: absolute; top: 12px; left: 12px;
  display: flex; gap: 10px; pointer-events: none; z-index: 5;
}
.hud-block {
  background: rgba(10, 14, 26, 0.62);
  backdrop-filter: blur(6px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 8px 12px;
}
.hud-big { font-size: 26px; font-weight: 700; font-variant-numeric: tabular-nums; }
.hud-sub { font-size: 11px; color: var(--accent); text-transform: uppercase; letter-spacing: 0.08em; }
.hud-row { display: flex; gap: 8px; justify-content: space-between; font-variant-numeric: tabular-nums; }
.hud-row span { color: var(--muted); }
.hud-row b { min-width: 64px; text-align: right; }

#polar-banner {
  position: absolute; top: 12px; left: 50%; transform: translateX(-50%);
  background: rgba(20, 24, 44, 0.85); border: 1px solid var(--accent-2);
  color: #cfe6ff; padding: 8px 16px; border-radius: 999px;
  font-size: 13px; z-index: 6; white-space: nowrap;
}

/* ---- panel ---- */
#panel {
  flex: 0 0 322px;
  overflow-y: auto;
  background: var(--panel);
  border-left: 1px solid var(--line);
  padding: 10px;
  display: flex; flex-direction: column; gap: 10px;
  scrollbar-width: thin;
}
.card {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.card summary {
  padding: 10px 12px; cursor: pointer; font-weight: 650; font-size: 13px;
  list-style: none; user-select: none;
}
.card summary::before { content: "▸"; margin-right: 8px; color: var(--muted); font-size: 11px; }
.card details[open] summary::before, .card[open] > summary::before { content: "▾"; }
.card summary:hover { background: rgba(255, 255, 255, 0.03); }
.card-body { padding: 4px 12px 12px; display: flex; flex-direction: column; gap: 10px; }

/* inputs */
input[type="number"], input[type="date"], input[type="search"], select {
  width: 100%; background: #0d1322; color: var(--text);
  border: 1px solid var(--line); border-radius: 7px;
  padding: 8px 9px; font-size: 14px;
  min-height: 38px;
}
input:focus, select:focus { outline: 2px solid rgba(255, 211, 77, 0.5); outline-offset: 0; }
label { font-size: 12px; color: var(--muted); display: flex; flex-direction: column; gap: 4px; }

.latlon-row { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }

#globe {
  width: 100%; height: 200px; border-radius: 8px; cursor: grab;
  background: radial-gradient(ellipse at 50% 40%, #16223e, #0a0e1c);
  touch-action: none;
}
#globe:active { cursor: grabbing; }

.hint { font-size: 11px; color: var(--muted); }

.preset-row { display: flex; flex-wrap: wrap; gap: 6px; }
.preset-row button, .quick-dates button, .jump-row button {
  background: #0d1322; color: var(--text);
  border: 1px solid var(--line); border-radius: 7px;
  padding: 7px 10px; font-size: 12.5px; cursor: pointer;
  min-height: 36px;
  transition: background 0.12s, border-color 0.12s;
}
.preset-row button:hover, .quick-dates button:hover, .jump-row button:hover {
  background: #1b2540; border-color: rgba(255, 211, 77, 0.4);
}
.preset-row button.active { border-color: var(--accent); color: var(--accent); }

.date-row { display: flex; flex-direction: column; gap: 8px; }
.quick-dates { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; }
.quick-dates button.active { border-color: var(--accent); color: var(--accent); }

.slider-row input[type="range"] {
  width: 100%; accent-color: var(--accent); height: 34px; cursor: pointer;
}
.slider-labels {
  display: flex; justify-content: space-between; font-size: 11px; color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.slider-labels #slider-time { color: var(--accent); font-weight: 650; font-size: 12px; }

.jump-row { display: grid; grid-template-columns: 1fr 1fr 1fr auto; gap: 6px; }
.jump-row button.play { min-width: 44px; font-size: 14px; }
.jump-row button.play.playing { border-color: var(--danger); color: var(--danger); }
.jump-row button:disabled { opacity: 0.35; cursor: default; }

.speed-row { display: flex; align-items: center; gap: 8px; }
.speed-row label { flex-direction: row; align-items: center; }
.speed-row select { flex: 1; }

/* readout tables */
table.readouts { width: 100%; border-collapse: collapse; font-size: 13px; }
table.readouts td { padding: 4px 0; border-bottom: 1px solid rgba(255,255,255,0.05); }
table.readouts td:first-child { color: var(--muted); }
table.readouts td:last-child {
  text-align: right; font-variant-numeric: tabular-nums; font-weight: 600;
}
table.readouts tr:last-child td { border-bottom: none; }

.obj-row input { text-align: right; }

#chart { width: 100%; height: 150px; border-radius: 8px; background: rgba(8, 11, 22, 0.6); touch-action: none; cursor: crosshair; }

.check { flex-direction: row; align-items: center; gap: 8px; font-size: 13px; color: var(--text); cursor: pointer; min-height: 32px; }
.check input { width: 18px; height: 18px; accent-color: var(--accent); }
.sw { width: 22px; height: 4px; border-radius: 2px; background: var(--c, #fff); display: inline-block; }

#fatal {
  position: fixed; inset: 20% 10% auto; z-index: 99;
  background: #2a1420; border: 1px solid var(--danger);
  color: #ffd7db; padding: 18px; border-radius: var(--radius);
  font-size: 14px;
}
.hidden { display: none !important; }

/* ---- mobile ---- */
#btn-panel-toggle { display: none; }

@media (max-width: 860px) {
  body { overflow: auto; }
  #layout { flex-direction: column; height: auto; }
  #viewport { height: 56vh; min-height: 320px; flex: none; }
  #panel {
    flex: none; width: 100%; border-left: none; border-top: 1px solid var(--line);
    overflow: visible; padding-bottom: calc(20px + env(safe-area-inset-bottom));
  }
  #btn-panel-toggle { display: inline-block; }
  #topbar h1 { font-size: 13px; }
  .hud-big { font-size: 20px; }
  #hud { top: 8px; left: 8px; gap: 6px; }
  .hud-block { padding: 6px 9px; }
  #panel.collapsed { display: none; }
}