:root{
  --ui:#0b1630;
  --muted: rgba(11,22,48,0.72);
  --panel: rgba(255,255,255,0.82);
  --panelBorder: rgba(11,22,48,0.16);
}

*{ box-sizing:border-box; }

html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

#c {
  display: block;
  width: 100vw;
  height: 100vh;
  touch-action: none;

  /* Critical: stops browser from scaling it in a way that distorts pixels */
  object-fit: contain;
}

#wrap{
  position:relative;
  width:100vw;
  height:100vh;
  overflow:hidden;
}

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

#hud{
  position:absolute;
  left: max(10px, env(safe-area-inset-left));
  top:  max(10px, env(safe-area-inset-top));
  right: max(10px, env(safe-area-inset-right));
  pointer-events:none;
  user-select:none;
}

.hud-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
}

#distance{
  font-weight:800;
  letter-spacing:0.2px;
  font-size:18px;
  text-shadow: 0 2px 14px rgba(255,255,255,0.55);
}

#healthWrap{
  display:flex;
  align-items:center;
  gap:10px;
}

#healthLabel{
  font-size:12px;
  color: var(--muted);
  letter-spacing:0.6px;
  text-transform:uppercase;
}

#healthBar{
  width: 180px;
  height: 12px;
  border: 1px solid rgba(11,22,48,0.22);
  border-radius: 999px;
  background: rgba(255,255,255,0.35);
  overflow:hidden;
  box-shadow: 0 6px 24px rgba(0,0,0,0.12);
}

#healthFill{
  height:100%;
  width:100%;
  background: linear-gradient(90deg, rgba(95,225,120,0.95), rgba(255,220,110,0.95), rgba(255,120,120,0.95));
  border-radius: 999px;
}

#hint{
  margin-top: 8px;
  font-size:12px;
  color: var(--muted);
  text-shadow: 0 2px 14px rgba(255,255,255,0.55);
}

#flapBtn{
  position:absolute;
  right: max(14px, env(safe-area-inset-right));
  bottom:max(14px, env(safe-area-inset-bottom));
  width: min(190px, 32vw);
  height: min(96px, 18vh);
  border-radius: 18px;
  border: 1px solid rgba(11,22,48,0.18);
  background: rgba(255,255,255,0.35);
  color: rgba(11,22,48,0.92);
  font-weight: 900;
  letter-spacing: 1px;
  font-size: 18px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 14px 50px rgba(0,0,0,0.18);
  cursor:pointer;
  user-select:none;
  -webkit-user-select:none;
  touch-action: manipulation;
}

#flapBtn:active{
  transform: translateY(1px);
  background: rgba(255,255,255,0.45);
}

.overlay{
  position:absolute;
  inset:0;
  display:flex;
  align-items:center;
  justify-content:center;
  padding: 18px;
  background: rgba(255,255,255,0.25);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.overlay.hidden{ display:none; }

.panel{
  width:min(520px, 94vw);
  border-radius: 22px;
  border:1px solid var(--panelBorder);
  background: var(--panel);
  padding: 18px;
  box-shadow: 0 24px 80px rgba(0,0,0,0.18);
}

.title{
  font-size: 28px;
  font-weight: 950;
  letter-spacing: 0.4px;
}

.subtitle{
  margin-top:6px;
  font-size: 13px;
  color: var(--muted);
}

.stats{
  margin-top: 14px;
  font-size: 14px;
  color: rgba(11,22,48,0.92);
  line-height: 1.35;
  min-height: 40px;
  white-space: pre-line;
}

button.primary, button.ghost{
  width:100%;
  height: 46px;
  margin-top: 12px;
  border-radius: 14px;
  font-weight: 900;
  letter-spacing: 0.6px;
  cursor:pointer;
}

button.primary{
  border:1px solid rgba(11,22,48,0.18);
  background: rgba(255,255,255,0.50);
  color: rgba(11,22,48,0.95);
}

button.ghost{
  border:1px solid rgba(11,22,48,0.14);
  background: rgba(255,255,255,0.26);
  color: rgba(11,22,48,0.85);
}

.small{
  margin-top: 10px;
  font-size: 12px;
  color: var(--muted);
}

@media (max-height: 420px){
  #hint{ display:none; }
  #flapBtn{ height: min(82px, 22vh); }
}