*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --accent: #c9302c;
  --jewel: #c41e3a;
  --brass: #b8860b;
  --steel: #71797e;
  --blued: #4169e1;
  --hairspring: #ff6b35;
  --hud-bg: rgba(0,0,0,0.65);
  --hud-border: rgba(255,255,255,0.15);
  --hud-text: #e8e8e8;
  --hud-dim: rgba(255,255,255,0.45);
  --grid: rgba(0,0,0,0.06);
  --ground: #f5f4f0;
}

body {
  overflow: hidden;
  background: var(--ground);
  font-family: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', 'Consolas', monospace;
  color: var(--hud-text);
  user-select: none;
  -webkit-user-select: none;
}

#canvas {
  display: block;
  width: 100vw;
  height: 100vh;
  touch-action: none;
}

.hud {
  position: fixed;
  pointer-events: none;
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  z-index: 10;
}

.hud-box {
  background: var(--hud-bg);
  border: 1px solid var(--hud-border);
  padding: 8px 12px;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.hud-tl {
  top: 16px;
  left: 16px;
}

.hud-tr {
  top: 16px;
  right: 16px;
  text-align: right;
}

.hud-bl {
  bottom: 16px;
  left: 16px;
}

.hud-br {
  bottom: 16px;
  right: 16px;
  text-align: right;
}

.hud-tl .hud-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 6px;
  letter-spacing: 0.12em;
}

.hud-tl .hud-row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  line-height: 1.7;
}

.hud-tl .hud-label { color: var(--hud-dim); }
.hud-tl .hud-val { color: var(--hud-text); }

.hud-tr .hud-row { line-height: 1.8; color: var(--hud-dim); }

.hud-bl .hud-row { line-height: 1.7; }
.hud-bl .hud-label { color: var(--hud-dim); }
.hud-bl .hud-val { color: var(--hud-text); }

.hud-br .hud-row { line-height: 1.8; color: var(--hud-dim); }

.hud-center {
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  transition: opacity 1.2s ease;
}

.hud-center .hud-box {
  padding: 7px 14px;
  color: var(--hud-dim);
  font-size: 9px;
  letter-spacing: 0.1em;
}

.hud-center.fade { opacity: 0; }

@keyframes fadeHint {
  0% { opacity: 1; }
  70% { opacity: 1; }
  100% { opacity: 0; }
}

#hint {
  animation: fadeHint 8s ease forwards;
}

.part-label {
  position: fixed;
  pointer-events: none;
  font-size: 9px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: rgba(0,0,0,0.7);
  color: #fff;
  padding: 3px 8px;
  border-left: 2px solid var(--accent);
  display: none;
  z-index: 20;
  white-space: nowrap;
  max-width: 200px;
}

.part-label .part-name { color: var(--accent); font-weight: 600; }
.part-label .part-desc { color: rgba(255,255,255,0.6); margin-top: 2px; font-size: 8px; }

.view-indicator {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 11px;
  letter-spacing: 0.15em;
  color: var(--hud-dim);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s;
  z-index: 15;
  text-transform: uppercase;
}

.view-indicator.show { opacity: 1; }

#pause-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  cursor: pointer;
  display: none;
}

#pause-overlay .pause-icon {
  width: 64px;
  height: 64px;
  border: 2px solid var(--hud-text);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

#pause-overlay .pause-icon::before,
#pause-overlay .pause-icon::after {
  content: '';
  width: 4px;
  height: 20px;
  background: var(--hud-text);
}

#pause-overlay.paused { display: flex; }

.reduced-motion-hint {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--hud-bg);
  border: 1px solid var(--hud-border);
  padding: 24px 32px;
  text-align: center;
  z-index: 60;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.reduced-motion-hint h2 {
  font-size: 14px;
  color: var(--accent);
  margin-bottom: 12px;
  letter-spacing: 0.1em;
}

.reduced-motion-hint p {
  font-size: 10px;
  color: var(--hud-dim);
  margin-bottom: 16px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.reduced-motion-hint button {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 10px 24px;
  font-family: inherit;
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  pointer-events: all;
}