:root {
  --bg: #05060d;
  --cyan: #43e2ff;
  --magenta: #ff4d9d;
  --amber: #ffd23f;
  --green: #5cff9d;
  --ink: #eaf2ff;
  --dim: #7b8aa6;
  --panel: rgba(10, 14, 26, 0.86);
}

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

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--ink);
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Segoe UI", system-ui, -apple-system, sans-serif;
  user-select: none;
  touch-action: none;
}

#app {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(120% 80% at 50% 0%, rgba(67, 226, 255, 0.13), transparent 60%),
    radial-gradient(90% 70% at 50% 110%, rgba(255, 77, 157, 0.12), transparent 60%),
    var(--bg);
}

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

/* ---------------- HUD ---------------- */
#hud {
  position: absolute;
  top: 0; left: 0; right: 0;
  padding: max(10px, env(safe-area-inset-top)) 14px 0;
  pointer-events: none;
  z-index: 5;
}

.hud-main {
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 760px;
  margin: 0 auto;
}

.cell {
  flex: 0 0 auto;
  min-width: 58px;
  padding: 6px 10px;
  border-radius: 12px;
  background: var(--panel);
  border: 1px solid rgba(67, 226, 255, 0.16);
  backdrop-filter: blur(8px);
  text-align: center;
}

.cell.wide { flex: 1 1 auto; }

.cell .k {
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--dim);
}

.cell .v {
  font-size: 18px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}

.cell .v.accent { color: var(--cyan); text-shadow: 0 0 14px rgba(67, 226, 255, 0.55); }
.cell .v.dim { color: var(--dim); font-size: 15px; }
.cell .v.heart { color: var(--magenta); text-shadow: 0 0 14px rgba(255, 77, 157, 0.5); }

#btn-pause {
  pointer-events: auto;
  flex: 0 0 auto;
  height: 40px;
  padding: 0 14px;
  border-radius: 12px;
  border: 1px solid rgba(67, 226, 255, 0.3);
  background: rgba(10, 14, 26, 0.8);
  color: var(--ink);
  font-size: 13px;
  letter-spacing: 1px;
  cursor: pointer;
}

#btn-pause:active { transform: scale(0.96); }

.hud-sub {
  max-width: 760px;
  margin: 8px auto 0;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: var(--dim);
  letter-spacing: 1px;
}

.hud-sub .mult {
  padding: 2px 9px;
  border-radius: 999px;
  border: 1px solid rgba(255, 210, 63, 0.5);
  color: var(--amber);
  font-weight: 700;
}

.hud-sub .mult.hot {
  color: #05060d;
  background: var(--amber);
  box-shadow: 0 0 18px rgba(255, 210, 63, 0.6);
}

.hud-sub .combo { color: var(--cyan); }

#powerbar {
  max-width: 760px;
  margin: 8px auto 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  min-height: 22px;
}

.pchip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  color: #05060d;
  background: var(--cyan);
  box-shadow: 0 0 12px rgba(67, 226, 255, 0.4);
}

.pchip .bar {
  width: 34px;
  height: 4px;
  border-radius: 2px;
  background: rgba(0, 0, 0, 0.28);
  overflow: hidden;
}

.pchip .bar i {
  display: block;
  height: 100%;
  background: rgba(0, 0, 0, 0.72);
}

/* ---------------- 提示与浮层 ---------------- */
#toast {
  position: absolute;
  left: 50%;
  top: 46%;
  transform: translate(-50%, -50%) scale(0.9);
  font-size: 30px;
  font-weight: 800;
  letter-spacing: 3px;
  color: var(--amber);
  text-shadow: 0 0 22px rgba(255, 210, 63, 0.55);
  opacity: 0;
  transition: opacity 0.22s ease, transform 0.22s ease;
  pointer-events: none;
  z-index: 6;
  white-space: nowrap;
}

#toast.show { opacity: 1; transform: translate(-50%, -50%) scale(1); }

#overlay {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(3, 5, 12, 0.62);
  backdrop-filter: blur(6px);
  z-index: 8;
}

#overlay.show { display: flex; }

.panel {
  width: min(88vw, 420px);
  padding: 26px 22px 22px;
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(18, 26, 46, 0.96), rgba(8, 11, 20, 0.96));
  border: 1px solid rgba(67, 226, 255, 0.24);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.6), inset 0 0 40px rgba(67, 226, 255, 0.05);
  text-align: center;
}

.panel h1 {
  margin: 0 0 4px;
  font-size: 27px;
  letter-spacing: 3px;
  background: linear-gradient(92deg, var(--cyan), var(--magenta));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.panel h2 {
  margin: 0 0 12px;
  font-size: 21px;
  letter-spacing: 2px;
  color: var(--ink);
}

.panel .sub {
  margin: 0 0 18px;
  font-size: 12px;
  line-height: 1.9;
  color: var(--dim);
  letter-spacing: 0.6px;
}

.panel .big {
  font-size: 34px;
  font-weight: 800;
  color: var(--cyan);
  text-shadow: 0 0 20px rgba(67, 226, 255, 0.45);
  font-variant-numeric: tabular-nums;
  margin: 2px 0 6px;
}

.panel .rowline {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--dim);
  padding: 5px 2px;
  border-bottom: 1px dashed rgba(123, 138, 166, 0.2);
}

.panel .btn {
  display: block;
  width: 100%;
  margin-top: 10px;
  padding: 13px 16px;
  border-radius: 14px;
  border: none;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 2px;
  color: #05060d;
  background: linear-gradient(92deg, var(--cyan), var(--green));
  box-shadow: 0 10px 26px rgba(67, 226, 255, 0.25);
  cursor: pointer;
}

.panel .btn.ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid rgba(123, 138, 166, 0.35);
  box-shadow: none;
}

.panel .btn:active { transform: translateY(1px) scale(0.99); }

#hint {
  position: absolute;
  left: 50%;
  bottom: max(12px, env(safe-area-inset-bottom));
  transform: translateX(-50%);
  font-size: 11px;
  color: var(--dim);
  letter-spacing: 1px;
  opacity: 0.85;
  pointer-events: none;
  z-index: 5;
  white-space: nowrap;
}

@media (max-width: 520px) {
  .cell { min-width: 50px; padding: 5px 8px; }
  .cell .v { font-size: 15px; }
  .cell .v.dim { font-size: 13px; }
  #btn-pause { height: 34px; padding: 0 10px; font-size: 12px; }
  .panel h1 { font-size: 23px; }
  #toast { font-size: 24px; }
}