:root {
  color-scheme: dark;
  --bg: radial-gradient(circle at top, #1c2340 0%, #090b14 55%, #03040a 100%);
  --card: rgba(14, 18, 35, 0.82);
  --line: rgba(110, 182, 255, 0.22);
  --text: #eaf4ff;
  --muted: #9eb6d4;
  --accent: #61f4ff;
  --accent-2: #7d5cff;
  --danger: #ff5b87;
  --success: #7dffb3;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Inter", "Noto Sans TC", sans-serif;
  color: var(--text);
  background: var(--bg);
}

button {
  font: inherit;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  border-radius: 14px;
  padding: 0.9rem 1.2rem;
  cursor: pointer;
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

button:hover {
  transform: translateY(-1px);
  border-color: rgba(97, 244, 255, 0.55);
}

button.primary {
  background: linear-gradient(135deg, rgba(97, 244, 255, 0.24), rgba(125, 92, 255, 0.28));
  border-color: rgba(97, 244, 255, 0.45);
}

.app-shell {
  width: min(1100px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 48px;
}

.hero-card,
.game-card {
  background: var(--card);
  border: 1px solid var(--line);
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.34);
  backdrop-filter: blur(16px);
}

.hero-card {
  border-radius: 28px;
  padding: 28px;
  display: grid;
  grid-template-columns: 1.8fr 1fr;
  gap: 18px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 10px;
  letter-spacing: 0.24em;
  color: var(--accent);
  font-size: 0.78rem;
}

h1 {
  font-size: clamp(2.1rem, 4vw, 4rem);
  line-height: 1;
  margin: 0;
}

.subtitle {
  color: var(--muted);
  font-size: 1.02rem;
  max-width: 52ch;
}

.stats-panel {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.stat {
  padding: 18px;
  border-radius: 22px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0.03));
}

.stat span {
  display: block;
  color: var(--muted);
  margin-bottom: 10px;
}

.stat strong {
  font-size: 1.6rem;
}

.game-card {
  margin-top: 22px;
  border-radius: 28px;
  padding: 24px;
}

.canvas-wrap {
  position: relative;
  width: min(100%, 520px);
  margin: 0 auto;
}

canvas {
  width: 100%;
  aspect-ratio: 1;
  display: block;
  background:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(180deg, rgba(7, 11, 27, 0.9), rgba(5, 8, 18, 0.96));
  background-size: 10% 10%, 10% 10%, auto;
  border-radius: 26px;
  border: 1px solid rgba(97, 244, 255, 0.22);
  box-shadow: inset 0 0 30px rgba(97, 244, 255, 0.08), 0 24px 60px rgba(0, 0, 0, 0.35);
}

.hud {
  position: absolute;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.46);
  color: #dfefff;
  font-size: 0.95rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  text-align: center;
}

.controls-row {
  margin: 20px auto 0;
  width: min(100%, 520px);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.touch-controls {
  width: min(100%, 300px);
  margin: 22px auto 0;
  display: grid;
  justify-items: center;
  gap: 10px;
}

.touch-mid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  width: 100%;
}

.touch-controls button {
  min-width: 78px;
}

.tips {
  width: min(100%, 520px);
  margin: 28px auto 0;
  color: var(--muted);
}

.tips h2 {
  color: var(--text);
  margin-bottom: 10px;
}

.tips ul {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
}

@media (max-width: 760px) {
  .hero-card {
    grid-template-columns: 1fr;
  }

  .stats-panel {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 520px) {
  .app-shell {
    width: min(100% - 18px, 100%);
    padding-top: 16px;
  }

  .hero-card,
  .game-card {
    border-radius: 22px;
    padding: 18px;
  }

  .stats-panel {
    grid-template-columns: 1fr;
  }

  .touch-controls button {
    min-width: 0;
    width: 100%;
  }
}