/* Helios 1 XR — Level 01: Cool Wake
   Art direction: ash charcoal + ember amber (Emberline), pale ash text. */

:root {
  --font-display: 'Cabinet Grotesk', 'Helvetica Neue', sans-serif;
  --font-body: 'Inter', 'Helvetica Neue', sans-serif;

  --color-bg: #131110;
  --color-surface: rgba(24, 20, 17, 0.78);
  --color-surface-2: rgba(34, 28, 23, 0.85);
  --color-border: rgba(232, 135, 74, 0.28);
  --color-divider: rgba(255, 255, 255, 0.08);
  --color-text: #ece5dc;
  --color-text-muted: #a89c8e;
  --color-text-faint: #6f665c;
  --color-primary: #e8874a;      /* ember amber */
  --color-primary-hover: #f49c62;
  --color-primary-active: #c96f36;
  --color-glow: rgba(232, 135, 74, 0.35);

  --text-xs: 12px;
  --text-sm: 14px;
  --text-base: 16px;
  --text-lg: 20px;
  --text-xl: 28px;
  --text-2xl: clamp(2.25rem, 1.4rem + 3.4vw, 4rem);

  --space-1: 4px; --space-2: 8px; --space-3: 12px; --space-4: 16px;
  --space-6: 24px; --space-8: 32px; --space-12: 48px;

  --panel-blur: 14px;
  --panel-radius: 10px;
  --transition-ui: 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

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

html, body {
  height: 100%;
  overflow: hidden;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

canvas { display: block; }

.hidden { display: none !important; }

/* ====== Full-viewport screens ====== */
.screen {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  background:
    radial-gradient(120% 90% at 50% 110%, rgba(210, 92, 34, 0.16), transparent 60%),
    rgba(12, 10, 9, 0.62);
  backdrop-filter: blur(3px);
}

.title-panel, .lore-panel {
  background: var(--color-surface);
  backdrop-filter: blur(var(--panel-blur));
  border: 1px solid var(--color-border);
  border-radius: var(--panel-radius);
  padding: var(--space-8) var(--space-8) var(--space-6);
  max-width: 560px;
  width: 100%;
  text-align: center;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.55), 0 0 60px var(--color-glow);
}

.title-logo { color: var(--color-primary); margin-bottom: var(--space-3); }

.eyebrow {
  font-size: var(--text-xs);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.game-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-2xl);
  line-height: 1.05;
  letter-spacing: 0.04em;
  color: var(--color-text);
}
.game-title.small { font-size: var(--text-xl); }

.level-line {
  font-size: var(--text-xs);
  letter-spacing: 0.28em;
  color: var(--color-primary);
  margin: var(--space-2) 0 var(--space-4);
}

.intro-text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin: 0 auto var(--space-6);
  max-width: 44ch;
}
.intro-text strong { color: var(--color-text); font-weight: 600; }

.btn-row { display: flex; gap: var(--space-3); justify-content: center; flex-wrap: wrap; }

.btn {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: var(--space-3) var(--space-6);
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-ui);
}
.btn-primary {
  background: var(--color-primary);
  color: #1a120b;
}
.btn-primary:hover { background: var(--color-primary-hover); transform: translateY(-1px); }
.btn-primary:active { background: var(--color-primary-active); transform: translateY(0); }
.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn-ghost:hover:not(:disabled) { border-color: var(--color-primary); color: var(--color-primary); }
.btn-ghost:disabled { opacity: 0.45; cursor: default; }

.vr-note {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-3);
  min-height: 1.2em;
}

.controls-hint {
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-divider);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  display: grid;
  gap: var(--space-1);
}
.key {
  display: inline-block;
  font-weight: 600;
  color: var(--color-text-muted);
  border: 1px solid var(--color-divider);
  border-radius: 4px;
  padding: 0 6px;
  font-size: 11px;
  letter-spacing: 0.08em;
}

/* ====== HUD ====== */
.game-ui {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 10;
  font-family: var(--font-body);
}
.game-ui button { pointer-events: auto; }

.hud-top {
  position: absolute;
  top: var(--space-4);
  left: var(--space-4);
  right: var(--space-4);
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
}

.hud-panel {
  background: var(--color-surface);
  backdrop-filter: blur(var(--panel-blur));
  border: 1px solid var(--color-border);
  border-radius: var(--panel-radius);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text);
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.7);
}

.hud-label {
  display: block;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.hud-value { font-variant-numeric: tabular-nums lining-nums; font-weight: 600; }

.interact-prompt {
  position: absolute;
  left: 50%;
  bottom: 18%;
  transform: translateX(-50%);
  font-weight: 500;
  color: var(--color-text);
  border-color: var(--color-primary);
  box-shadow: 0 0 24px var(--color-glow);
}

#reticle {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 6px;
  height: 6px;
  margin: -3px 0 0 -3px;
  border-radius: 50%;
  background: rgba(236, 229, 220, 0.85);
  box-shadow: 0 0 6px rgba(0, 0, 0, 0.8);
}
#reticle.hot { background: var(--color-primary); box-shadow: 0 0 10px var(--color-glow); }

.nb { white-space: nowrap; }

.scan-hint {
  position: absolute;
  top: 84px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--color-primary);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  animation: scan-in 0.25s ease-out;
}
@keyframes scan-in {
  from { opacity: 0; transform: translateX(-50%) translateY(-6px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

.icon-btn {
  position: absolute;
  bottom: var(--space-4);
  right: var(--space-4);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--color-text-muted);
  padding: 0;
}
.icon-btn:hover { color: var(--color-primary); }
.icon-btn.muted { color: var(--color-text-faint); }

/* ====== Lore modal ====== */
.lore-panel { max-width: 480px; text-align: left; }
.lore-panel .eyebrow { color: var(--color-primary); }
.lore-panel h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-xl);
  line-height: 1.15;
  margin-bottom: var(--space-3);
}
.lore-panel p#lore-body {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}
.lore-panel .btn { width: 100%; }

/* ====== Debug ====== */
#debug-overlay {
  position: fixed;
  bottom: 8px;
  left: 8px;
  z-index: 30;
  font: 11px/1.5 monospace;
  color: #9f9;
  background: rgba(0, 0, 0, 0.6);
  padding: 6px 8px;
  border-radius: 4px;
  pointer-events: none;
  white-space: pre;
}

@media (max-width: 560px) {
  .title-panel, .lore-panel { padding: var(--space-6) var(--space-4); }
  .hud-top { flex-direction: column; align-items: flex-start; }
  #hud-frags { align-self: flex-end; margin-top: calc(-1 * var(--space-8)); }
}