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

html, body {
  height: 100%;
  background: #1a0f2e;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  overflow: hidden;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

#game {
  position: relative;
  width: 100vw;
  height: 100vh;   /* fallback for browsers without dvh */
  height: 100dvh;  /* dynamic viewport height — shrinks when mobile browser chrome shows */
  display: flex;
  align-items: center;
  justify-content: center;
  background: #1a0f2e;
}

#canvas {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
}

/* HUD */
#hud {
  position: absolute;
  top: 14px;
  left: 16px;
  display: flex;
  gap: 18px;
  pointer-events: none;
}
.stat {
  display: flex;
  align-items: baseline;
  gap: 5px;
  background: rgba(20, 12, 36, 0.5);
  padding: 6px 12px;
  border-radius: 10px;
  color: #fce8d6;
  font-variant-numeric: tabular-nums;
  backdrop-filter: blur(4px);
}
.stat .label { font-size: 11px; letter-spacing: 1.5px; color: #d99a78; font-weight: 700; }
.stat span:not(.label):not(.unit) { font-size: 22px; font-weight: 800; }
.stat .unit { font-size: 12px; color: #d99a78; }

/* Boost indicator — hidden until active */
.boost {
  display: flex;
  align-items: center;
  padding: 6px 14px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 1px;
  color: #1a0f2e;
  background: linear-gradient(90deg, #ffd24d, #ff9e3d);
  box-shadow: 0 0 18px rgba(255, 180, 80, 0.7);
  opacity: 0;
  transform: scale(0.85);
  transition: opacity 0.12s ease, transform 0.12s ease;
  pointer-events: none;
}
.boost.on { opacity: 1; transform: scale(1); animation: boostPulse 0.5s ease-in-out infinite alternate; }
@keyframes boostPulse { to { box-shadow: 0 0 26px rgba(255, 200, 110, 0.95); } }

/* Double-jump variant (cool tones) */
.boost.djump {
  color: #0d1230;
  background: linear-gradient(90deg, #5be0ff, #b48cff);
  box-shadow: 0 0 18px rgba(120, 180, 255, 0.7);
}
.boost.djump.on { animation: djumpPulse 0.5s ease-in-out infinite alternate; }
@keyframes djumpPulse { to { box-shadow: 0 0 26px rgba(150, 200, 255, 0.95); } }

/* Overlay */
#overlay {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(6, 9, 22, 0.55);
  backdrop-filter: blur(3px);
  z-index: 10;
}
#overlay.show { display: flex; }
.card {
  background: linear-gradient(180deg, #2c1a44, #1c1030);
  border: 1px solid #5a3568;
  border-radius: 18px;
  padding: 28px 30px;
  max-width: 380px;
  text-align: center;
  color: #fce8d6;
  box-shadow: 0 24px 60px rgba(0,0,0,0.5);
}
.card h1 {
  font-size: 30px;
  letter-spacing: 2px;
  margin-bottom: 8px;
  background: linear-gradient(90deg, #ffd24d, #ff7a4d);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.card #subtitle { color: #e3b79c; font-size: 15px; margin-bottom: 16px; }
.card ul {
  list-style: none;
  text-align: left;
  margin: 0 auto 20px;
  display: inline-block;
  color: #e9d5c4;
  font-size: 13.5px;
  line-height: 1.9;
}
.card ul b { color: #ffce6b; }
#startBtn {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 1px;
  color: #1a0f2e;
  background: linear-gradient(90deg, #ffd24d, #ff7a4d);
  border: none;
  border-radius: 12px;
  padding: 12px 34px;
  cursor: pointer;
  transition: transform 0.08s ease, filter 0.15s ease;
}
#startBtn:hover { filter: brightness(1.1); }
#startBtn:active { transform: scale(0.96); }

#shareBtn {
  display: block;
  margin: 10px auto 0;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
  color: #c8a8e0;
  background: none;
  border: 1px solid rgba(200, 168, 224, 0.35);
  border-radius: 10px;
  padding: 7px 20px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}
#shareBtn:hover { color: #e8d0ff; border-color: rgba(200, 168, 224, 0.7); }
#shareBtn:active { transform: scale(0.96); }

/* Controls */
#controls {
  position: absolute;
  bottom: calc(22px + env(safe-area-inset-bottom, 0px));
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  padding: 0 22px;
  pointer-events: none;
}
.left-group { display: flex; gap: 14px; pointer-events: auto; }
.ctrl {
  pointer-events: auto;
  border: 1px solid rgba(255,255,255,0.22);
  background: rgba(36, 22, 56, 0.55);
  color: #fce8d6;
  border-radius: 16px;
  backdrop-filter: blur(6px);
  cursor: pointer;
  transition: transform 0.06s ease, background 0.12s ease;
  font-weight: 800;
}
.ctrl:active { transform: scale(0.93); background: rgba(255, 158, 77, 0.32); }
.ctrl.rot { width: 66px; height: 66px; font-size: 26px; }
.ctrl.jump {
  width: 130px; height: 130px; font-size: 18px; letter-spacing: 1px;
  border-radius: 50%;
  background: rgba(255, 158, 77, 0.2);
  border-color: rgba(255, 158, 77, 0.55);
}