/* ─────────────────────────────────────────────
   Reset & Base
───────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  width: 100%; height: 100%;
  overflow: hidden;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: #0d0d1a;
  color: #fff;
  -webkit-tap-highlight-color: transparent;
}

/* ─────────────────────────────────────────────
   Écran de démarrage
───────────────────────────────────────────── */
#start-screen {
  position: absolute; inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(160deg, #0d0d1a 0%, #1a1a3e 100%);
  z-index: 1000;
  gap: 24px;
  padding: 32px;
  text-align: center;
}

#start-screen h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  line-height: 1.2;
}

#start-screen h1 span { color: #a78bfa; }

#start-screen p {
  font-size: 1rem;
  color: #94a3b8;
  max-width: 300px;
  line-height: 1.6;
}

#start-btn {
  margin-top: 8px;
  padding: 16px 40px;
  background: #7c3aed;
  color: #fff;
  border: none;
  border-radius: 50px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  -webkit-appearance: none;
}

#start-btn:active { background: #6d28d9; transform: scale(0.97); }

.start-badges {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.badge {
  background: rgba(167, 139, 250, 0.15);
  border: 1px solid rgba(167, 139, 250, 0.3);
  border-radius: 20px;
  padding: 6px 14px;
  font-size: 0.8rem;
  color: #c4b5fd;
}

/* ─────────────────────────────────────────────
   Conteneur AR (A-Frame)
───────────────────────────────────────────── */
#ar-container {
  position: absolute; inset: 0;
  display: none;
  background: transparent;
}

a-scene {
  position: absolute; inset: 0;
  z-index: 2;
}

/* AR.js injecte une balise video; on la maintient visible au-dessus du fond page. */
#ar-container video,
#ar-container .arjs-video {
  position: absolute !important;
  inset: 0 !important;
  width: 100% !important;
  height: 100% !important;
  object-fit: cover !important;
  z-index: 1 !important;
  background: transparent !important;
}

#ar-container canvas,
#ar-container .a-canvas,
#ar-container .arjs-canvas {
  position: absolute !important;
  inset: 0 !important;
  z-index: 2 !important;
  background: transparent !important;
}

/* ─────────────────────────────────────────────
   Loader
───────────────────────────────────────────── */
#loader {
  position: absolute; inset: 0;
  background: rgba(0, 0, 0, 0.78);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 900;
  gap: 20px;
}

.loader-spinner {
  width: 48px; height: 48px;
  border: 4px solid rgba(167, 139, 250, 0.2);
  border-top-color: #a78bfa;
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

#loader-text {
  font-size: 0.95rem;
  color: #94a3b8;
}

/* ─────────────────────────────────────────────
   HUD — en haut
───────────────────────────────────────────── */
#hud-top {
  position: absolute;
  top: 0; left: 0; right: 0;
  padding: 14px 16px 10px;
  background: linear-gradient(to bottom, rgba(0,0,0,0.7) 0%, transparent 100%);
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 100;
  pointer-events: none;
}

/* Boussole */
#compass-widget {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

#compass-ring {
  width: 60px; height: 60px;
  border: 2px solid rgba(255,255,255,0.25);
  border-radius: 50%;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

#compass-needle {
  width: 4px; height: 26px;
  background: linear-gradient(to top, #ef4444 50%, #fff 50%);
  border-radius: 2px;
  transform-origin: center bottom;
  transition: transform 0.15s ease-out;
  position: relative;
  bottom: -4px;
}

.compass-label-n {
  position: absolute;
  top: 3px;
  font-size: 9px;
  font-weight: 700;
  color: #ef4444;
  letter-spacing: 0;
}

#compass-deg {
  font-size: 11px;
  color: #94a3b8;
  font-variant-numeric: tabular-nums;
}

/* Statuts droite */
#hud-status {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
}

#phone-status, #gps-accuracy, #target-azimuth {
  font-size: 11px;
  background: rgba(0,0,0,0.45);
  padding: 3px 8px;
  border-radius: 12px;
  color: #94a3b8;
}

#gps-accuracy { color: #4ade80; }

/* ─────────────────────────────────────────────
   Panneau directionnel — en bas
───────────────────────────────────────────── */
#direction-panel {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.85) 0%, transparent 100%);
  padding: 16px 16px 28px;
  z-index: 100;
  pointer-events: none;
}

#direction-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 220px;
  overflow: hidden;
}

.monument-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 12px;
  padding: 8px 12px;
  transition: background 0.2s;
}

.monument-item.in-axis {
  background: rgba(124, 58, 237, 0.25);
  border-color: rgba(167, 139, 250, 0.5);
}

.arrow-icon {
  font-size: 1rem;
  min-width: 20px;
  text-align: center;
  color: #a78bfa;
}

.in-axis .arrow-icon { color: #c4b5fd; }

.monument-info {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.monument-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: #f1f5f9;
}

.monument-dist {
  font-size: 0.75rem;
  color: #64748b;
}

.in-axis .monument-dist { color: #a78bfa; }

.no-monuments {
  font-size: 0.85rem;
  color: #475569;
  text-align: center;
  padding: 12px;
}

/* ─────────────────────────────────────────────
   Panneau monument détecté
───────────────────────────────────────────── */
#detected-panel {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%) scale(0.9);
  background: rgba(13, 13, 30, 0.95);
  border: 1px solid rgba(167, 139, 250, 0.4);
  border-radius: 20px;
  padding: 24px;
  width: min(340px, 90vw);
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s, transform 0.3s;
  text-align: center;
}

#detected-panel.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translate(-50%, -50%) scale(1);
}

#detected-panel h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: #c4b5fd;
}

#detected-desc {
  font-size: 0.9rem;
  color: #94a3b8;
  line-height: 1.5;
  margin-bottom: 20px;
}

#detected-close {
  background: #7c3aed;
  color: #fff;
  border: none;
  border-radius: 50px;
  padding: 10px 28px;
  font-size: 0.95rem;
  cursor: pointer;
  pointer-events: auto;
}

#detected-close:active { background: #6d28d9; }

/* ─────────────────────────────────────────────
   Toast d'erreur
───────────────────────────────────────────── */
#error-toast {
  position: absolute;
  top: 90px; left: 50%;
  transform: translateX(-50%) translateY(-10px);
  background: rgba(220, 38, 38, 0.9);
  color: #fff;
  padding: 10px 18px;
  border-radius: 12px;
  font-size: 0.85rem;
  z-index: 500;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s, transform 0.3s;
  white-space: nowrap;
  max-width: 90vw;
  white-space: normal;
  text-align: center;
}

#error-toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}