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

html, body {
  width: 100%; height: 100%;
  overflow: hidden;
  background: #1c4a70;
  font-family: -apple-system, "PingFang SC", "Helvetica Neue", system-ui, sans-serif;
  -webkit-user-select: none; user-select: none;
  touch-action: none;
}

#game { display: block; width: 100vw; height: 100vh; }

.hidden { display: none !important; }

/* ---------- HUD ---------- */
#hud {
  position: fixed; top: 14px; left: 16px; right: 16px;
  display: flex; align-items: center; gap: 26px;
  flex-wrap: wrap; row-gap: 6px;
  color: #fff;
  text-shadow: 0 1px 3px rgba(0,0,0,.5);
  pointer-events: none;
}
.hud-item { display: flex; align-items: center; gap: 8px; white-space: nowrap; }
.label { font-size: 13px; opacity: .85; }
.value { font-size: 18px; font-weight: 700; font-variant-numeric: tabular-nums; }
#hudBestVal.newrec { color: #ffd35c; text-shadow: 0 0 8px rgba(255,211,92,.7); }

#pause, #mute {
  font-size: 20px;
  cursor: pointer;
  pointer-events: auto;
  opacity: .8;
}
#pause { margin-left: auto; }

#hpbar {
  width: 160px; height: 14px;
  background: rgba(0,0,0,.45);
  border: 2px solid rgba(255,255,255,.7);
  border-radius: 8px;
  overflow: hidden;
}
#hpfill {
  height: 100%; width: 100%;
  background: linear-gradient(90deg, #e74c3c, #f1c40f 45%, #2ecc71 75%);
  background-size: 160px 100%;
  background-position: right;
  transition: width .15s ease-out;
}
#hpbar.hit { animation: hpflash .35s; }
@keyframes hpflash {
  0%, 100% { border-color: rgba(255,255,255,.7); }
  50% { border-color: #ff5040; box-shadow: 0 0 12px #ff5040; }
}
#hpbar.heal { animation: hpheal .5s; }
@keyframes hpheal {
  0%, 100% { border-color: rgba(255,255,255,.7); }
  50% { border-color: #4be08a; box-shadow: 0 0 14px #4be08a; }
}

/* ---------- 屏幕划桨按钮 ---------- */
#controls { pointer-events: none; }
.ctl-group {
  position: fixed; bottom: 18px;
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  pointer-events: none;
}
.ctl-left { left: 18px; }
.ctl-right { right: 18px; }
.ctl {
  width: 58px; height: 58px;
  border-radius: 50%;
  background: rgba(255,255,255,.14);
  border: 2px solid rgba(255,255,255,.45);
  color: #fff;
  font-size: 24px;
  display: flex; align-items: center; justify-content: center;
  pointer-events: auto;
  cursor: pointer;
  touch-action: none;
  -webkit-tap-highlight-color: transparent;
}
.ctl:active { background: rgba(255,255,255,.4); }
.ctl-label {
  color: rgba(255,255,255,.85);
  font-size: 12px;
  text-shadow: 0 1px 3px rgba(0,0,0,.5);
}

/* ---------- 覆盖层 ---------- */
.overlay {
  position: fixed; inset: 0;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 14px;
  background: rgba(8, 30, 50, .55);
  color: #fff;
  text-align: center;
  text-shadow: 0 2px 6px rgba(0,0,0,.6);
}
.overlay h1 { font-size: 52px; letter-spacing: 6px; }
#langBtn {
  position: fixed; top: 16px; right: 16px;
  padding: 8px 18px;
  border: 2px solid rgba(255,255,255,.5);
  border-radius: 20px;
  background: rgba(255,255,255,.12);
  color: #fff;
  font-size: 15px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
#langBtn:hover { background: rgba(255,255,255,.28); }
.overlay .sub { font-size: 18px; opacity: .8; letter-spacing: 3px; margin-top: -8px; }
.instructions {
  margin: 14px 0;
  padding: 18px 30px;
  background: rgba(0,0,0,.35);
  border-radius: 14px;
  line-height: 2;
  font-size: 15px;
  max-width: 92vw;
}
.instructions b { color: #ffd35c; }
.overlay .big { font-size: 30px; font-weight: 700; }
.overlay .big span { color: #ffd35c; }
.overlay .record { font-size: 17px; opacity: .9; }
.overlay .record span { color: #7ee0a3; font-weight: 700; }
.prompt { font-size: 16px; opacity: .9; animation: blink 1.4s infinite; }
@keyframes blink { 0%,100% { opacity: .9; } 50% { opacity: .35; } }

@media (max-width: 600px) {
  .overlay h1 { font-size: 36px; }
  .instructions { font-size: 13px; padding: 12px 18px; line-height: 1.9; }
  #hpbar { width: 110px; }
  #hud { gap: 14px; }
  .ctl { width: 52px; height: 52px; }
}