/* Cave Escape — UI overlay styles. Canvas renders the 3D world underneath;
   everything here is the HTML overlay (menu, HUD, modals). Color direction
   per concept section 54: deep navy/purple cave, electric-blue crystal,
   warm orange lava, bright yellow score, light character. */

:root {
  --cave-navy: #0a0a18;
  --cave-purple: #1b1330;
  --cave-purple-2: #241a3d;
  --crystal-blue: #5ee7ff;
  --crystal-pink: #ff6bd6;
  --lava-orange: #ff6a1f;
  --score-yellow: #ffd93d;
  --text-light: #f3f0ff;
  --text-dim: #b6aed8;
  --danger: #ff4d6a;
  --success: #6effa0;
  --glass-bg: rgba(20, 14, 36, 0.72);
  --glass-border: rgba(155, 140, 255, 0.28);
  --shadow-glow: 0 0 24px rgba(94, 231, 255, 0.25);
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0; width: 100%; height: 100%;
  background: var(--cave-navy);
  color: var(--text-light);
  font-family: 'Trebuchet MS', 'Segoe UI', system-ui, -apple-system, sans-serif;
  overscroll-behavior: none;
}

#game-root {
  position: relative;
  width: 100%;
  height: 100dvh;
  max-width: 1200px;
  margin: 0 auto;
  overflow: hidden;
  background: var(--cave-navy);
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
}

#game-canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  display: block;
  touch-action: none;
}

.screen {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 24px;
  text-align: center;
  z-index: 10;
}
.screen[hidden] { display: none !important; }

.modal-screen {
  background: rgba(6, 4, 14, 0.72);
  backdrop-filter: blur(3px);
  z-index: 30;
}

/* ---- Loading ---- */
#screen-loading { z-index: 50; background: var(--cave-navy); }
.loading-title {
  font-size: clamp(28px, 7vw, 44px);
  font-weight: 800;
  letter-spacing: 3px;
  background: linear-gradient(90deg, var(--crystal-blue), var(--crystal-pink));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  margin-bottom: 14px;
  text-shadow: none;
}
.loading-bar {
  width: min(280px, 70vw); height: 8px; border-radius: 6px;
  background: rgba(255,255,255,0.08);
  overflow: hidden; margin-top: 10px;
  border: 1px solid var(--glass-border);
}
.loading-bar-fill {
  height: 100%; width: 10%;
  background: linear-gradient(90deg, var(--crystal-blue), var(--crystal-pink));
  animation: loading-pulse 1.1s ease-in-out infinite;
  border-radius: 6px;
}
@keyframes loading-pulse {
  0% { width: 8%; margin-left: 0%; }
  50% { width: 55%; margin-left: 20%; }
  100% { width: 8%; margin-left: 92%; }
}
.loading-sub { color: var(--text-dim); margin-top: 14px; font-size: 14px; }

/* ---- Menu ---- */
.game-title {
  font-size: clamp(38px, 10vw, 68px);
  font-weight: 900;
  letter-spacing: 4px;
  margin: 0;
  background: linear-gradient(120deg, var(--crystal-blue) 10%, var(--score-yellow) 50%, var(--lava-orange) 90%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  filter: drop-shadow(0 0 18px rgba(94, 231, 255, 0.35));
}
.game-tagline {
  color: var(--text-dim);
  font-size: clamp(14px, 3.2vw, 18px);
  margin: 6px 0 26px;
  letter-spacing: 0.5px;
}
.best-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  border-radius: 999px; padding: 8px 18px; margin-bottom: 22px;
  font-size: 14px; color: var(--score-yellow); font-weight: 700;
}
.menu-buttons { display: flex; flex-direction: column; gap: 12px; width: min(300px, 78vw); }

.btn {
  appearance: none; border: none; cursor: pointer;
  font-family: inherit; font-weight: 800; letter-spacing: 1px;
  border-radius: 14px; padding: 15px 20px; font-size: 16px;
  color: var(--cave-navy);
  background: linear-gradient(135deg, var(--crystal-blue), #8fd8ff);
  box-shadow: 0 6px 0 rgba(0,0,0,0.25), var(--shadow-glow);
  transition: transform 0.08s ease, box-shadow 0.08s ease;
}
.btn:active { transform: translateY(3px); box-shadow: 0 3px 0 rgba(0,0,0,0.25); }
.btn-primary { background: linear-gradient(135deg, var(--score-yellow), #ffb347); font-size: 19px; padding: 17px 20px; }
.btn-secondary {
  background: var(--glass-bg); color: var(--text-light); border: 1px solid var(--glass-border);
  box-shadow: 0 4px 0 rgba(0,0,0,0.3);
}
.btn-danger { background: linear-gradient(135deg, var(--danger), #ff8aa0); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-row { display: flex; gap: 10px; width: 100%; }
.btn-row .btn { flex: 1; }

.icon-btn {
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  color: var(--text-light); font-size: 18px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
}
.icon-btn[hidden] { display: none !important; }

.top-controls {
  position: absolute; top: calc(14px + var(--safe-top)); left: 50%; transform: translateX(-50%);
  display: flex; gap: 8px; z-index: 20;
}
.corner-controls {
  position: absolute; top: calc(14px + var(--safe-top)); right: 14px; z-index: 20;
}

/* ---- HUD ---- */
#hud { position: absolute; inset: 0; pointer-events: none; z-index: 15; }
#hud[hidden] { display: none !important; }
.hud-score {
  position: absolute; top: calc(14px + var(--safe-top)); left: 14px;
  background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: 12px;
  padding: 8px 14px; text-align: left;
}
.hud-score .label { font-size: 10px; letter-spacing: 1.5px; color: var(--text-dim); }
.hud-score .value { font-size: 22px; font-weight: 800; color: var(--score-yellow); }
.hud-distance {
  position: absolute; top: calc(14px + var(--safe-top)); left: 50%; transform: translateX(-50%);
  text-align: center; margin-top: 58px;
}
.hud-distance .value { font-size: 15px; font-weight: 700; color: var(--crystal-blue); text-shadow: 0 0 10px rgba(94,231,255,0.5); }
.hud-lives {
  position: absolute; top: calc(14px + var(--safe-top)); right: 14px;
  background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: 12px;
  padding: 8px 12px; font-size: 20px;
}

.powerup-tray {
  position: absolute; bottom: calc(18px + var(--safe-bottom)); left: 50%; transform: translateX(-50%);
  display: flex; gap: 8px;
}
.powerup-chip {
  background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: 10px;
  padding: 6px 10px; font-size: 11px; font-weight: 700; display: flex; gap: 6px; align-items: center;
}
.powerup-dot { width: 8px; height: 8px; border-radius: 50%; }

.event-banner {
  position: absolute; top: 34%; left: 50%; transform: translate(-50%, -50%) scale(0.8);
  font-size: clamp(20px, 6vw, 34px); font-weight: 900; letter-spacing: 2px;
  color: var(--lava-orange); text-shadow: 0 0 20px rgba(255, 106, 31, 0.7);
  opacity: 0; transition: opacity 0.25s ease, transform 0.25s ease;
}
.event-banner.show { opacity: 1; transform: translate(-50%, -50%) scale(1); }

.combo-popup, .toast-popup {
  position: absolute; left: 50%; top: 40%; transform: translate(-50%, -50%);
  font-weight: 900; pointer-events: none; opacity: 0; letter-spacing: 1px;
  text-shadow: 0 0 12px currentColor;
}
.toast-popup { color: var(--score-yellow); font-size: clamp(18px, 5vw, 26px); }
.combo-popup { color: var(--crystal-pink); font-size: clamp(16px, 4.4vw, 22px); }
.pop-anim { animation: pop-float 0.9s ease-out forwards; }
@keyframes pop-float {
  0% { opacity: 0; transform: translate(-50%, -40%) scale(0.6); }
  15% { opacity: 1; transform: translate(-50%, -55%) scale(1.08); }
  75% { opacity: 1; }
  100% { opacity: 0; transform: translate(-50%, -85%) scale(1); }
}

/* ---- Panels (pause / game over / modals) ---- */
.panel {
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  border-radius: 20px; padding: 28px 26px; width: min(380px, 90vw);
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.panel h2 {
  margin: 0 0 6px; font-size: clamp(22px, 6vw, 30px); font-weight: 900; letter-spacing: 1px;
  color: var(--text-light);
}
.panel .sub { color: var(--text-dim); font-size: 13px; margin-bottom: 18px; }

.stat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 16px 0; }
.stat-box {
  background: rgba(255,255,255,0.04); border: 1px solid var(--glass-border);
  border-radius: 12px; padding: 10px; text-align: center;
}
.stat-box .label { font-size: 10px; letter-spacing: 1.5px; color: var(--text-dim); }
.stat-box .value { font-size: 20px; font-weight: 800; color: var(--text-light); }
.stat-box.best .value { color: var(--score-yellow); }
.stat-box.distance .value { color: var(--crystal-blue); }

.new-record-badge {
  display: inline-block; margin: 4px 0 12px; padding: 6px 14px; border-radius: 999px;
  background: linear-gradient(135deg, var(--score-yellow), var(--lava-orange));
  color: #2a1400; font-weight: 900; font-size: 13px; letter-spacing: 1px;
  animation: badge-pulse 1s ease-in-out infinite;
}
@keyframes badge-pulse { 0%,100% { transform: scale(1); } 50% { transform: scale(1.06); } }

.close-call {
  background: rgba(255,106,31,0.12); border: 1px solid rgba(255,106,31,0.4);
  border-radius: 12px; padding: 10px 12px; font-size: 13px; color: #ffcf9e; margin-bottom: 14px;
}

.nickname-row { display: flex; gap: 8px; margin-bottom: 12px; }
.nickname-row input {
  flex: 1; min-width: 0; border-radius: 10px; border: 1px solid var(--glass-border);
  background: rgba(0,0,0,0.3); color: var(--text-light); padding: 12px; font-size: 15px;
  font-family: inherit;
}
.nickname-row input:focus { outline: 2px solid var(--crystal-blue); }
.submit-status { font-size: 12px; min-height: 16px; margin-bottom: 10px; color: var(--text-dim); }
.submit-status.ok { color: var(--success); }
.submit-status.err { color: var(--danger); }

.leaderboard-list { list-style: none; margin: 0; padding: 0; max-height: 46vh; overflow-y: auto; text-align: left; }
.leaderboard-list li {
  display: grid; grid-template-columns: 32px 1fr auto; gap: 10px; align-items: center;
  padding: 9px 6px; border-bottom: 1px solid rgba(255,255,255,0.06); font-size: 14px;
}
.leaderboard-list .rank { font-weight: 800; color: var(--text-dim); }
.leaderboard-list li:nth-child(1) .rank { color: #ffd93d; }
.leaderboard-list li:nth-child(2) .rank { color: #d6d6ff; }
.leaderboard-list li:nth-child(3) .rank { color: #ffb37a; }
.leaderboard-list .name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.leaderboard-list .lb-score { font-weight: 800; color: var(--score-yellow); }
.leaderboard-empty { color: var(--text-dim); font-size: 13px; padding: 18px 0; }

.howto-story { text-align: left; font-size: 13.5px; color: var(--text-dim); line-height: 1.65; margin: 0 0 14px; padding: 10px 12px; background: rgba(255,255,255,0.04); border-left: 3px solid var(--score-yellow); border-radius: 4px; font-style: italic; }
.howto-story b { color: var(--text-light); font-style: normal; }
.howto-list { text-align: left; font-size: 14px; color: var(--text-dim); line-height: 1.7; margin: 0 0 18px; padding-left: 18px; }
.howto-list b { color: var(--text-light); }

.modal-close {
  position: absolute; top: 10px; right: 10px;
  width: 34px; height: 34px; border-radius: 50%;
  background: rgba(0,0,0,0.35); border: 1px solid var(--glass-border);
  color: var(--text-light); font-size: 16px; cursor: pointer;
}

.panel-relative { position: relative; }

.seo-copy {
  position: absolute; bottom: -1px; left: 0; right: 0;
  transform: translateY(100%);
  color: var(--text-dim);
}

@media (prefers-reduced-motion: reduce) {
  .pop-anim, .badge-pulse, .loading-bar-fill { animation-duration: 0.01ms !important; }
}

@media (max-width: 420px) {
  .panel { padding: 22px 18px; }
  .stat-grid { gap: 8px; }
}