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

:root {
  --gold:    #c9a84c;
  --dark:    #0a0a0a;
  --panel:   rgba(10,10,10,0.85);
  --text:    #f0ede8;
  --muted:   #888;
  --radius:  8px;
  --trans:   0.4s ease;
}

html, body {
  width: 100%; height: 100%;
  overflow: hidden;
  font-family: 'Segoe UI', system-ui, sans-serif;
  background: var(--dark);
  color: var(--text);
}

/* ── Pages ────────────────────────────────────────────────────────────────── */
.page {
  position: fixed; inset: 0;
  opacity: 0; pointer-events: none;
  transition: opacity var(--trans);
  z-index: 1;
}
.page.active {
  opacity: 1; pointer-events: all;
  z-index: 2;
}

/* ── Page: Cover ──────────────────────────────────────────────────────────── */
#page-cover { background: #000; overflow: hidden; }

#cover-canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  cursor: grab;
}
#cover-canvas:active { cursor: grabbing; }

#cover-content {
  position: absolute; bottom: 3rem; left: 50%;
  transform: translateX(-50%);
  z-index: 2; text-align: center;
  pointer-events: all;
}
#cover-enter {
  display: inline-block;
  padding: 0.9rem 2.5rem;
  border: 1px solid var(--gold);
  color: var(--gold); letter-spacing: 0.15em;
  text-transform: uppercase; font-size: 0.85rem;
  cursor: pointer;
  transition: background var(--trans), color var(--trans);
  background: rgba(0,0,0,0.5); backdrop-filter: blur(6px);
}
#cover-enter:hover { background: var(--gold); color: var(--dark); }

/* ── Page: Room Selection (360° lobby) ───────────────────────────────────── */
#page-rooms { background: #000; }

#lobby-canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  cursor: grab;
}
#lobby-canvas:active { cursor: grabbing; }

#lobby-title {
  position: absolute; top: 1.5rem; left: 50%; transform: translateX(-50%);
  background: var(--panel); backdrop-filter: blur(8px);
  padding: 0.6rem 1.8rem; border-radius: 30px;
  font-size: 0.9rem; letter-spacing: 0.18em; text-transform: uppercase;
  border: 1px solid #333; white-space: nowrap; z-index: 10;
  pointer-events: none;
}

#lobby-back {
  position: absolute; top: 1.5rem; left: 1.5rem; z-index: 10;
  background: var(--panel); backdrop-filter: blur(8px);
  border: 1px solid #333; color: var(--text);
  padding: 0.5rem 1rem; border-radius: 20px;
  font-size: 0.8rem; letter-spacing: 0.08em;
  cursor: pointer; transition: border-color var(--trans);
}
#lobby-back:hover { border-color: var(--gold); color: var(--gold); }

/* Debug overlay */
#lobby-debug {
  position: absolute; bottom: 1.5rem; left: 50%; transform: translateX(-50%);
  background: rgba(0,0,0,0.75); color: var(--gold);
  font-family: monospace; font-size: 0.85rem;
  padding: 0.4rem 1rem; border-radius: 6px;
  border: 1px solid var(--gold); z-index: 20;
  pointer-events: none; letter-spacing: 0.05em;
}
#lobby-debug-toggle {
  position: absolute; bottom: 1.5rem; right: 1.5rem; z-index: 20;
  background: var(--panel); border: 1px solid #444;
  color: var(--muted); width: 32px; height: 32px;
  border-radius: 6px; cursor: pointer; font-size: 0.9rem;
  transition: border-color var(--trans);
}
#lobby-debug-toggle:hover { border-color: var(--gold); color: var(--gold); }

/* Hint text — fade sau 4s */
#lobby-hint {
  position: absolute; bottom: 4rem; left: 50%; transform: translateX(-50%);
  color: rgba(255,255,255,0.5); font-size: 0.78rem;
  letter-spacing: 0.12em; text-transform: uppercase;
  pointer-events: none; z-index: 10;
  animation: fadeHint 4s ease forwards;
}
@keyframes fadeHint {
  0%,60%  { opacity: 1; }
  100%    { opacity: 0; }
}

/* ── Page: 3D Room ────────────────────────────────────────────────────────── */
#page-room3d { background: #000; }

#three-canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  cursor: grab;
}
#three-canvas:active { cursor: grabbing; }

/* ── HUD ──────────────────────────────────────────────────────────────────── */
#hud {
  position: absolute; inset: 0;
  pointer-events: none; z-index: 10;
}

#room-name-bar {
  position: absolute; top: 1.5rem; left: 50%; transform: translateX(-50%);
  background: var(--panel); backdrop-filter: blur(8px);
  padding: 0.6rem 1.8rem; border-radius: 30px;
  font-size: 0.9rem; letter-spacing: 0.12em; text-transform: uppercase;
  border: 1px solid #333;
  white-space: nowrap;
}

#hud-controls {
  position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%);
  display: flex; gap: 0.8rem; pointer-events: all;
}
.hud-btn {
  background: var(--panel); backdrop-filter: blur(8px);
  border: 1px solid #333; color: var(--text);
  padding: 0.6rem 1.2rem; border-radius: 30px;
  font-size: 0.8rem; letter-spacing: 0.08em;
  cursor: pointer; transition: border-color var(--trans), color var(--trans);
  text-transform: uppercase;
}
.hud-btn:hover { border-color: var(--gold); color: var(--gold); }
.hud-btn.disabled { opacity: 0.3; cursor: not-allowed; }

#btn-fullscreen-3d {
  position: absolute; top: 1.5rem; right: 1.5rem;
  pointer-events: all;
  background: var(--panel); border: 1px solid #333;
  color: var(--text); width: 40px; height: 40px;
  border-radius: 8px; cursor: pointer; font-size: 1rem;
  display: flex; align-items: center; justify-content: center;
  transition: border-color var(--trans);
}
#btn-fullscreen-3d:hover { border-color: var(--gold); }

/* Minimap */
#minimap {
  position: absolute; bottom: 2rem; right: 1.5rem;
  width: 100px; height: 60px;
  background: var(--panel); border: 1px solid #333;
  border-radius: var(--radius); overflow: hidden;
  display: flex; align-items: center; justify-content: center;
  gap: 0.4rem;
}
.minimap-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: #444; border: 1px solid #555;
  transition: background var(--trans);
}
.minimap-dot.active { background: var(--gold); }

/* Auto-tour badge */
#auto-tour-badge {
  position: absolute; top: 1.5rem; left: 1.5rem;
  background: var(--gold); color: var(--dark);
  font-size: 0.7rem; font-weight: 700;
  padding: 0.3rem 0.8rem; border-radius: 20px;
  letter-spacing: 0.05em; text-transform: uppercase;
  display: none;
}
#auto-tour-badge.visible { display: block; }

/* ── Image Wall Panel ─────────────────────────────────────────────────────── */
#wall-panel {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.92); backdrop-filter: blur(10px);
  z-index: 100;
  display: flex; flex-direction: column;
  opacity: 0; pointer-events: none;
  transition: opacity var(--trans);
}
#wall-panel.open { opacity: 1; pointer-events: all; }

#wall-panel-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.2rem 1.5rem; border-bottom: 1px solid #222;
}
#wall-panel-title {
  font-size: 1rem; letter-spacing: 0.15em; text-transform: uppercase;
}
#wall-panel-close {
  background: none; border: 1px solid #444; color: var(--text);
  width: 36px; height: 36px; border-radius: 6px;
  cursor: pointer; font-size: 1.2rem;
  display: flex; align-items: center; justify-content: center;
  transition: border-color var(--trans);
}
#wall-panel-close:hover { border-color: var(--gold); color: var(--gold); }

#wall-grid {
  flex: 1; overflow-y: auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.8rem; padding: 1.2rem;
}
.wall-thumb {
  aspect-ratio: 1;
  overflow: hidden; border-radius: 6px;
  cursor: pointer; border: 2px solid transparent;
  transition: border-color var(--trans), transform var(--trans);
}
.wall-thumb:hover { border-color: var(--gold); transform: scale(1.02); }
.wall-thumb img {
  width: 100%; height: 100%; object-fit: cover;
  display: block;
}

/* ── PhotoSwipe overrides ─────────────────────────────────────────────────── */
.pswp { z-index: 200; }
.pswp__bg { background: rgba(0,0,0,0.95); }

/* ── Loader ───────────────────────────────────────────────────────────────── */
#loader {
  position: fixed; inset: 0; z-index: 999;
  background: var(--dark);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 1.2rem;
  transition: opacity 0.6s ease;
}
#loader.hidden { opacity: 0; pointer-events: none; }
#loader-ring {
  width: 48px; height: 48px; border-radius: 50%;
  border: 3px solid #222; border-top-color: var(--gold);
  animation: spin 0.8s linear infinite;
}
#loader-text { font-size: 0.8rem; letter-spacing: 0.15em; color: var(--muted); text-transform: uppercase; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Scroll bar ───────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: #111; }
::-webkit-scrollbar-thumb { background: #333; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--gold); }

/* ── Responsive ───────────────────────────────────────────────────────────── */
@media (max-width: 600px) {
  #hud-controls { flex-wrap: wrap; justify-content: center; }
  #minimap { display: none; }
  #wall-grid { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); }
}