:root {
  --bg-0: #1a0e0c;
  --bg-1: #2c1712;
  --rock-1: #a06a5c;
  --rock-2: #7a4a40;
  --rock-3: #5c342c;
  --shaft-0: #150907;
  --shaft-1: #2a120e;
  --gold: #ffce54;
  --gold-deep: #e6a428;
  --amber: #ff9d4d;
  --cyan: #5fe0e8;
  --cyan-deep: #2fb6c2;
  --cream: #f6ead9;
  --danger: #ff5c5c;
  --ok: #7ee08c;
  --glass: rgba(28, 14, 11, 0.62);
  --glass-2: rgba(46, 22, 17, 0.55);
  --glass-border: rgba(255, 206, 84, 0.18);
  --text: #f7ede0;
  --text-dim: #d7c2af;
  --font-head: 'Orbitron', sans-serif;
  --font-body: 'Outfit', sans-serif;
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg-0);
  font-family: var(--font-body);
  color: var(--text);
  overscroll-behavior: none;
  touch-action: none;
  user-select: none;
}

#app {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(120% 100% at 50% 0%, #3a1d16 0%, #1a0e0c 70%);
}

canvas#game {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

#vignette {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 5;
  background: radial-gradient(120% 90% at 50% 45%, rgba(0, 0, 0, 0) 45%, rgba(10, 4, 3, 0.55) 100%);
}

/* ---------- Shared screen chrome ---------- */
.screen {
  position: absolute;
  inset: 0;
  z-index: 20;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  padding: 24px;
  text-align: center;
}

.hidden {
  display: none !important;
}

.fade-in {
  animation: fadeIn .45s ease both;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.glass-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 22px;
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.06);
  padding: 28px 26px;
}

.game-title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2.1rem, 7vw, 3.4rem);
  letter-spacing: 2px;
  margin: 0;
  color: var(--cream);
  text-shadow: 0 2px 0 rgba(0, 0, 0, 0.35), 0 0 26px rgba(255, 206, 84, 0.35);
}

.game-title span {
  color: var(--gold);
  -webkit-text-stroke: 1px rgba(0, 0, 0, 0.25);
}

.subtitle {
  font-size: .85rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-top: -8px;
}

/* buttons */
.btn {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: .4px;
  border: none;
  border-radius: 16px;
  padding: 15px 30px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: transform .12s ease, box-shadow .12s ease, filter .12s ease;
  color: var(--bg-0);
  min-width: 220px;
}

.btn:active {
  transform: scale(.96);
}

.btn-primary {
  background: linear-gradient(180deg, #ffe08a 0%, var(--gold) 45%, var(--gold-deep) 100%);
  box-shadow: 0 8px 0 #b57a1c, 0 14px 24px rgba(230, 164, 40, 0.35);
}

.btn-primary:hover {
  filter: brightness(1.05);
}

.btn-secondary {
  background: linear-gradient(180deg, #7fe9ef 0%, var(--cyan) 45%, var(--cyan-deep) 100%);
  box-shadow: 0 8px 0 #1c7c85, 0 14px 24px rgba(47, 182, 194, 0.28);
  margin-top: 10px;
}

.btn-ghost {
  background: var(--glass-2);
  color: var(--text);
  border: 1px solid var(--glass-border);
  box-shadow: none;
  min-width: auto;
  padding: 12px 20px;
}

.btn-ghost:active {
  transform: scale(.94);
}

.btn-danger {
  background: linear-gradient(180deg, #ff8a8a 0%, var(--danger) 60%, #d63c3c 100%);
  box-shadow: 0 8px 0 #9c2b2b, 0 14px 24px rgba(214, 60, 60, 0.3);
}

.btn-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.icon-btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--glass-2);
  border: 1px solid var(--glass-border);
  color: var(--cream);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.3rem;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.35);
}

.icon-btn:active {
  transform: scale(.92);
}

/* ---------- Preloader ---------- */
#preloader {
  background: radial-gradient(120% 100% at 50% 30%, #3a1d16 0%, #150b09 75%);
  z-index: 50;
}

.logo-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.pick-icon {
  width: 64px;
  height: 64px;
  animation: swing 1.1s ease-in-out infinite;
  transform-origin: 70% 20%;
  filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.5));
}

@keyframes swing {

  0%,
  100% {
    transform: rotate(-24deg);
  }

  50% {
    transform: rotate(24deg);
  }
}

.progress-track {
  width: min(320px, 72vw);
  height: 14px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  overflow: hidden;
  margin-top: 10px;
  box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.4);
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--gold-deep), var(--gold), var(--amber));
  border-radius: 10px;
  transition: width .18s ease;
  box-shadow: 0 0 12px rgba(255, 206, 84, 0.6);
}

.load-tip {
  font-size: .82rem;
  color: var(--text-dim);
  min-height: 1.2em;
  letter-spacing: .3px;
}

.load-pct {
  font-family: var(--font-head);
  font-size: .8rem;
  color: var(--gold);
  letter-spacing: 1px;
}

/* ---------- Menu ---------- */
#menu {
  gap: 14px;
}

.stat-pill-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 2px;
}

.stat-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--glass-2);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: .88rem;
  font-weight: 600;
  color: var(--text);
}

.stat-pill .ico {
  font-size: 1rem;
}

.stat-pill b {
  color: var(--gold);
  font-family: var(--font-head);
}

/* ---------- How To Play ---------- */
.modal-card {
  max-width: 440px;
  width: 100%;
  max-height: 82vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.modal-card::-webkit-scrollbar {
  width: 6px;
}

.modal-card::-webkit-scrollbar-thumb {
  background: rgba(255, 206, 84, 0.4);
  border-radius: 6px;
}

.modal-title {
  font-family: var(--font-head);
  font-size: 1.3rem;
  color: var(--gold);
  letter-spacing: 1px;
  margin: 0;
}

.howto-section {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  text-align: left;
}

.howto-ico {
  flex: 0 0 auto;
  width: 46px;
  height: 46px;
  border-radius: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  background: linear-gradient(160deg, rgba(255, 206, 84, 0.22), rgba(255, 206, 84, 0.06));
  border: 1px solid var(--glass-border);
}

.howto-text h4 {
  margin: 0 0 3px;
  font-size: .95rem;
  color: var(--cream);
}

.howto-text p {
  margin: 0;
  font-size: .85rem;
  color: var(--text-dim);
  line-height: 1.4;
}

/* ---------- HUD ---------- */
#hud {
  position: absolute;
  inset: 0;
  z-index: 15;
  pointer-events: none;
}

.hud-top {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 16px 16px 0;
}

.hud-pause {
  pointer-events: all;
}

.hud-score-wrap {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
}

.hud-depth {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 2rem;
  color: var(--cream);
  text-shadow: 0 2px 6px rgba(0, 0, 0, 0.6);
  line-height: 1;
}

.hud-depth small {
  font-size: .6rem;
  letter-spacing: 2px;
  color: var(--text-dim);
  display: block;
  font-family: var(--font-body);
  font-weight: 600;
  text-align: right;
}

.hud-gold {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--glass-2);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  padding: 5px 12px 5px 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: .95rem;
  color: var(--gold);
}

.hud-gold .gem-ico {
  width: 16px;
  height: 16px;
}

.hud-lives {
  display: flex;
  gap: 5px;
  margin-top: 2px;
}

.hud-lives .heart {
  font-size: 1.15rem;
  filter: drop-shadow(0 2px 3px rgba(0, 0, 0, 0.5));
  transition: transform .2s ease, opacity .2s ease;
}

.hud-lives .heart.lost {
  opacity: .25;
  transform: scale(.8);
}

.hud-powerups {
  position: absolute;
  top: 112px;
  right: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: flex-end;
}

.pu-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--glass-2);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  padding: 5px 10px;
  font-size: .78rem;
  color: var(--text);
  opacity: 0;
  transform: translateX(20px);
  transition: all .2s ease;
}

.pu-chip.show {
  opacity: 1;
  transform: translateX(0);
}

.pu-bar {
  width: 44px;
  height: 5px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
  overflow: hidden;
}

.pu-bar i {
  display: block;
  height: 100%;
  background: var(--cyan);
}

.combo-pop {
  position: absolute;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--gold);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.6);
  pointer-events: none;
  animation: popFloat 0.85s ease-out forwards;
}

@keyframes popFloat {
  0% {
    opacity: 0;
    transform: translateY(0) scale(.7);
  }

  15% {
    opacity: 1;
    transform: translateY(-6px) scale(1.05);
  }

  100% {
    opacity: 0;
    transform: translateY(-46px) scale(1);
  }
}

.biome-banner {
  position: absolute;
  top: 36%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 3px;
  color: var(--cream);
  text-transform: uppercase;
  text-align: center;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.6);
  opacity: 0;
  pointer-events: none;
}

.biome-banner.show {
  animation: biomeShow 2.2s ease forwards;
}

@keyframes biomeShow {
  0% {
    opacity: 0;
    letter-spacing: 8px;
  }

  15% {
    opacity: 1;
    letter-spacing: 3px;
  }

  75% {
    opacity: 1;
  }

  100% {
    opacity: 0;
  }
}

.tap-hint {
  position: absolute;
  left: 50%;
  bottom: 8%;
  transform: translateX(-50%);
  font-size: .78rem;
  color: var(--text-dim);
  letter-spacing: .5px;
  background: var(--glass-2);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  padding: 7px 16px;
  opacity: 0;
  animation: hintShow 3.6s ease forwards;
}

@keyframes hintShow {
  0% {
    opacity: 0;
  }

  10% {
    opacity: 1;
  }

  80% {
    opacity: 1;
  }

  100% {
    opacity: 0;
  }
}

/* ---------- Countdown ---------- */
#countdown {
  position: absolute;
  inset: 0;
  z-index: 25;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-head);
  font-weight: 900;
  color: var(--gold);
  font-size: 5rem;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
  pointer-events: none;
}

.cd-num {
  animation: cdPulse .82s ease both;
}

@keyframes cdPulse {
  0% {
    opacity: 0;
    transform: scale(1.7);
  }

  30% {
    opacity: 1;
    transform: scale(1);
  }

  80% {
    opacity: 1;
  }

  100% {
    opacity: 0;
    transform: scale(.8);
  }
}

/* ---------- Pause / GameOver ---------- */
#pause-screen {
  z-index: 22;
  background: rgba(10, 5, 4, 0.45);
  backdrop-filter: blur(3px);
}

.result-title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.7rem;
  color: var(--cream);
  margin: 0;
  letter-spacing: 1px;
}

.result-title.record {
  color: var(--gold);
  text-shadow: 0 0 22px rgba(255, 206, 84, 0.6);
}

.result-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  width: 100%;
  margin: 6px 0 4px;
}

.result-stat {
  background: var(--glass-2);
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  padding: 12px 8px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.result-stat .val {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--gold);
}

.result-stat .lbl {
  font-size: .68rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-dim);
}

#gameover {
  z-index: 23;
}

.sound-toggle-inline {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 26;
}

@media (max-width:480px) {
  .glass-card {
    padding: 22px 18px;
    border-radius: 18px;
  }

  .hud-depth {
    font-size: 1.6rem;
  }
}