:root {
  --bg: #12291f;
  --bg-deep: #0c1d15;
  --card: #1d3f2f;
  --card-edge: #0a1811;
  --ink: #f4f9f4;
  --ink-dim: #9db8a6;
  --accent: #8fd14f;
  --accent-ink: #10241a;
  --danger: #e2694f;
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html, body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: radial-gradient(120% 90% at 50% -10%, var(--bg) 0%, var(--bg-deep) 70%);
  color: var(--ink);
  display: flex;
  align-items: center;
  justify-content: center;
  -webkit-tap-highlight-color: transparent;
}

#app {
  width: min(440px, 94vw);
  padding: 24px 16px 40px;
  text-align: center;
}

.title {
  font-size: 1.9rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 8px 0 4px;
}

.subtitle {
  color: var(--ink-dim);
  margin: 0 0 24px;
}

#token-input {
  display: block;
  width: 100%;
  font-size: 2.6rem;
  font-weight: 800;
  letter-spacing: 0.45em;
  text-indent: 0.45em;
  text-transform: uppercase;
  text-align: center;
  padding: 14px 8px;
  border-radius: 16px;
  border: 2px solid var(--card);
  background: var(--card);
  color: var(--ink);
  outline: none;
  margin-bottom: 16px;
}

#token-input:focus { border-color: var(--accent); }

.big-btn {
  width: 100%;
  padding: 14px;
  font-size: 1.2rem;
  font-weight: 800;
  border: none;
  border-radius: 16px;
  background: var(--accent);
  color: var(--accent-ink);
  cursor: pointer;
  touch-action: manipulation;
}

.big-btn:active { transform: translateY(2px); }

.error { color: var(--danger); font-weight: 600; }

.game-head {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 8px;
}

#kid-name {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0;
}

.badge {
  background: var(--accent);
  color: var(--accent-ink);
  border-radius: 999px;
  padding: 5px 12px;
  font-weight: 800;
  font-size: 0.9rem;
  white-space: nowrap;
}

.balance-wrap { margin: 18px 0 6px; }

#balance {
  font-size: clamp(4.2rem, 26vw, 7rem);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.03em;
  line-height: 1.05;
  display: inline-block;
}

#balance.pop { animation: pop 0.35s ease; }

@keyframes pop {
  35% { transform: scale(1.09); color: var(--accent); }
}

.unit {
  color: var(--ink-dim);
  font-size: 1.3rem;
  font-weight: 700;
  margin-top: 2px;
}

.buttons {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 26px auto 0;
  max-width: 360px;
}

.spend {
  aspect-ratio: 1;
  border-radius: 50%;
  border: none;
  font-size: 1.35rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  background: var(--card);
  color: var(--ink);
  box-shadow: 0 5px 0 var(--card-edge);
  cursor: pointer;
  touch-action: manipulation;
  transition: transform 0.05s ease, box-shadow 0.05s ease;
  white-space: nowrap;
}

.spend:active {
  transform: translateY(4px);
  box-shadow: 0 1px 0 var(--card-edge);
}

.spend:disabled { opacity: 0.45; }

.ghost {
  margin-top: 28px;
  background: none;
  border: none;
  color: var(--ink-dim);
  font-size: 0.95rem;
  cursor: pointer;
  padding: 8px;
}

.ghost:active { color: var(--ink); }

.notice {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  background: var(--danger);
  color: #fff;
  font-weight: 700;
  padding: 12px 22px;
  border-radius: 999px;
  box-shadow: 0 6px 24px rgb(0 0 0 / 0.45);
  max-width: 90vw;
}