:root {
  --bg-color: #0b0c1b;
  --bg-panel: #0f1029;
  --text-color: #e8e1d5;
  --text-muted: #8a8577;
  --accent-color: #d4af37;
  --accent-glow: rgba(212, 175, 55, 0.3);
}

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

html, body {
  height: 100dvh;
  overflow: hidden;
  background: radial-gradient(ellipse at 50% 40%, #141638 0%, #0b0c1b 60%, #06060f 100%);
  color: var(--text-color);
  font-family: 'Noto Serif SC', 'Georgia', serif;
  -webkit-font-smoothing: antialiased;
}

/* Subtle stars background */
#stars {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.4;
}

/* ---- Canvas 3D ---- */
#canvas-container {
  position: fixed;
  inset: 0;
  z-index: 1;
  touch-action: none;
}

#canvas-container canvas {
  display: block;
  width: 100%;
  height: 100%;
}

/* ---- Panel resultado (bottom sheet) ---- */
#result-panel {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 10;
  background: linear-gradient(to top, var(--bg-panel) 85%, transparent);
  padding: 2rem 1.5rem calc(env(safe-area-inset-bottom, 0px) + 1.5rem);
  transform: translateY(100%);
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  max-height: 55vh;
  overflow-y: auto;
  overscroll-behavior: contain;
}

#result-panel.visible {
  transform: translateY(0);
}

/* ---- Hexagrama display ---- */
.hex-header {
  text-align: center;
  margin-bottom: 1.2rem;
}

.hex-number {
  font-size: 0.85rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hex-name-chinese {
  font-size: 2.2rem;
  color: var(--accent-color);
  margin: 0.3rem 0;
  line-height: 1.2;
}

.hex-name-pinyin {
  font-size: 1rem;
  color: var(--text-muted);
  font-style: italic;
}

.hex-name-english {
  font-size: 1.1rem;
  margin-top: 0.2rem;
}

/* ---- Líneas del hexagrama ---- */
.hex-lines {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  margin: 1.5rem auto;
  width: fit-content;
}

.hex-line {
  display: flex;
  gap: 12px;
  height: 8px;
}

.hex-line.yang {
  width: 120px;
  background: var(--accent-color);
  border-radius: 2px;
}

.hex-line.yin {
  width: 120px;
  justify-content: space-between;
}

.hex-line.yin::before,
.hex-line.yin::after {
  content: '';
  display: block;
  width: 50px;
  height: 100%;
  background: var(--accent-color);
  border-radius: 2px;
}

/* ---- Trigramas componentes ---- */
.hex-trigrams {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-top: 1.2rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.hex-trigram-info {
  text-align: center;
}

.hex-trigram-info .symbol {
  font-size: 1.8rem;
  color: var(--accent-color);
  display: block;
  margin-bottom: 0.3rem;
}

.hex-trigram-info .label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  opacity: 0.6;
}



/* ---- Loading ---- */
#loading {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: var(--bg-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-color);
  font-size: 1.2rem;
  transition: opacity 0.6s;
}

#loading.hidden {
  opacity: 0;
  pointer-events: none;
}

/* ---- Desktop ---- */
@media (min-width: 768px) {
  #result-panel {
    max-width: 480px;
    left: 50%;
    transform: translateX(-50%) translateY(100%);
    border-radius: 1rem 1rem 0 0;
  }

  #result-panel.visible {
    transform: translateX(-50%) translateY(0);
  }
}

/* ---- Suite navigation back link ---- */
.suite-back-link {
  position: fixed;
  top: 1.2rem;
  left: 1.2rem;
  z-index: 100;
  font-family: 'Noto Serif SC', 'Georgia', serif;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.4rem 0.8rem;
  background: rgba(11, 12, 27, 0.6);
  border: 1px solid rgba(212, 175, 55, 0.2);
  border-radius: 4px;
  backdrop-filter: blur(4px);
  transition: color 0.2s, border-color 0.2s;
}
.suite-back-link:hover {
  color: var(--accent-color);
  border-color: var(--accent-color);
}