:root {
  --bg: #070b12;
  --panel: #0c1322;
  --panel-2: #101a2e;
  --ink: #d7e5ff;
  --ink-dim: #93a5c4;
  --blue: #4da3ff;
  --red: #ff5a5a;
  --amber: #ffb020;
  --line: #22314d;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.45;
}

body {
  max-width: 1500px;
  margin: 0 auto;
  padding: 12px 16px 32px;
}

/* ---------- HUD ---------- */

#hud {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 16px;
  margin-bottom: 12px;
}

.hud-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  flex-wrap: wrap;
}

.hud-titles h1 {
  font-size: 1.15rem;
  margin: 0 0 2px;
  letter-spacing: 0.01em;
}

.hud-titles {
  min-width: 0;
  flex: 1 1 320px;
}

.subtitle {
  margin: 0;
  color: var(--ink-dim);
  font-style: italic;
}

.hud-badges {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

.badge {
  font-family: var(--mono);
  font-size: 0.78rem;
  border: 1px solid var(--line);
  background: var(--panel-2);
  border-radius: 20px;
  padding: 3px 10px;
  white-space: nowrap;
}

.badge-warn {
  border-color: var(--amber);
  color: var(--amber);
}

.warning {
  background: #241a08;
  border-left: 3px solid var(--amber);
  padding: 8px 12px;
  font-size: 0.85rem;
  border-radius: 0 6px 6px 0;
}

.interp {
  min-height: 1.6em;
  font-size: 0.92rem;
  color: var(--ink);
  border-left: 3px solid var(--blue);
  padding-left: 10px;
}

.controls-row { align-items: center; }

.controls-hint {
  font-size: 0.8rem;
  color: var(--ink-dim);
  margin: 4px 0;
}

kbd {
  font-family: var(--mono);
  font-size: 0.75rem;
  background: #1a2740;
  border: 1px solid #31435f;
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 0 5px;
}

#help-btn {
  background: var(--panel-2);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 4px 12px;
  cursor: pointer;
}

.help {
  border-top: 1px solid var(--line);
  margin-top: 8px;
  padding-top: 8px;
  font-size: 0.88rem;
}

.help h2 { font-size: 1rem; margin: 4px 0; }
.help ul { margin: 6px 0; padding-left: 20px; }
.help li { margin-bottom: 4px; }

.dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-right: 5px;
  vertical-align: baseline;
}
.dot-r { background: var(--blue); }
.dot-c1 { background: var(--red); }
.dot-c2 { background: transparent; border: 2px solid var(--amber); width: 8px; height: 8px; }

/* ---------- Stage ---------- */

#stage-card {
  position: relative;
  background: #05080e;
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 12px;
}

#stage-head {
  display: flex;
  gap: 8px 16px;
  align-items: center;
  flex-wrap: wrap;
  padding: 8px 14px;
  font-size: 0.85rem;
  border-bottom: 1px solid var(--line);
  background: rgba(12, 19, 34, 0.9);
}

#stage-head > * { min-width: 0; }

.mono { font-family: var(--mono); }

.legend { display: flex; gap: 14px; margin-left: auto; color: var(--ink-dim); flex-wrap: wrap; }

#sphere-holder { width: 100%; height: 62vh; min-height: 420px; }
#sphere-holder canvas { display: block; }

.tooltip {
  position: absolute;
  pointer-events: none;
  background: rgba(8, 13, 24, 0.94);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 6px 10px;
  font-family: var(--mono);
  font-size: 0.75rem;
  line-height: 1.5;
  z-index: 5;
  max-width: 280px;
}

/* ---------- Dashboard ---------- */

#dashboard {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
  min-width: 0;
}

.card h2 {
  font-size: 0.95rem;
  margin: 0 0 6px;
  font-weight: 600;
}

.units { color: var(--ink-dim); font-weight: 400; font-size: 0.8rem; }

#dashboard .card canvas.chart-canvas {
  display: block;
  width: 100%;
  height: 220px;
}

.caption {
  font-size: 0.78rem;
  color: var(--ink-dim);
  margin: 6px 0 0;
}

.metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin-top: 8px;
}

.metric {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 5px 8px;
  font-size: 0.75rem;
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow-wrap: anywhere;
}

.metric .k { color: var(--ink-dim); }
.metric .v { font-family: var(--mono); font-size: 0.82rem; }
.metric-fail { border-color: var(--red); }
.metric-fail .v { color: var(--red); }

footer {
  margin-top: 14px;
  color: var(--ink-dim);
  font-size: 0.8rem;
}

footer a { color: var(--blue); }
footer code { font-family: var(--mono); font-size: 0.75rem; }

/* ---------- Responsive: stack below 1100px, allow scroll ---------- */

@media (max-width: 1100px) {
  #dashboard { grid-template-columns: 1fr; }
  #sphere-holder { height: 70vh; }
  body { padding: 8px 8px 24px; }
  .hud-titles h1 { font-size: 1rem; }
  #dashboard .card canvas.chart-canvas {
    height: 210px;
  }
}

@media (max-width: 520px) {
  #dashboard .card canvas.chart-canvas {
    height: 190px;
  }
}