:root {
  color-scheme: dark;
  --bg: #08111f;
  --panel: rgba(10, 20, 37, 0.8);
  --panel-border: rgba(255, 255, 255, 0.08);
  --text: #edf2ff;
  --muted: #91a1c0;
  --accent: #7c5cff;
  --accent-2: #1ad1ff;
  --x: #8b5cf6;
  --o: #22d3ee;
  --draw: #fbbf24;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(124, 92, 255, 0.35), transparent 30%),
    radial-gradient(circle at bottom right, rgba(26, 209, 255, 0.18), transparent 28%),
    linear-gradient(180deg, #0a1528 0%, var(--bg) 100%);
}

.shell {
  min-height: 100vh;
  display: grid;
  gap: 1.5rem;
  grid-template-columns: minmax(0, 720px) minmax(280px, 320px);
  align-content: center;
  justify-content: center;
  padding: 2rem;
}

.card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 24px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.game-card {
  padding: 2rem;
}

.score-card {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.eyebrow,
.label,
.note,
.subtitle {
  color: var(--muted);
}

.eyebrow,
.label {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  font-weight: 700;
}

h1 {
  margin: 0.5rem 0;
  font-size: clamp(2.2rem, 5vw, 3.5rem);
}

.subtitle {
  margin: 0 0 1.5rem;
  max-width: 48ch;
  line-height: 1.6;
}

.status-row {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.status {
  margin-top: 0.25rem;
  font-size: 1.15rem;
  font-weight: 700;
}

.board {
  display: grid;
  grid-template-columns: repeat(3, minmax(90px, 1fr));
  gap: 0.9rem;
}

.cell {
  aspect-ratio: 1;
  border: 0;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  font-size: clamp(2.5rem, 10vw, 4rem);
  font-weight: 800;
  cursor: pointer;
  transition: transform 150ms ease, background 150ms ease, box-shadow 150ms ease;
}

.cell:hover:enabled,
.cell:focus-visible:enabled {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.1);
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.25);
  outline: none;
}

.cell.x {
  color: var(--x);
}

.cell.o {
  color: var(--o);
}

.cell.win {
  background: linear-gradient(135deg, rgba(124, 92, 255, 0.25), rgba(26, 209, 255, 0.22));
  box-shadow: 0 18px 36px rgba(79, 70, 229, 0.22);
}

.actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

.btn {
  border: 0;
  border-radius: 999px;
  padding: 0.9rem 1.25rem;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #5b8cff);
  color: white;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
}

.scores {
  margin: 1rem 0;
  display: grid;
  gap: 0.9rem;
}

.score {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.9rem;
  padding: 1rem;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.05);
}

.token {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-weight: 800;
}

.score strong {
  font-size: 1.5rem;
}

.score.x .token { background: rgba(139, 92, 246, 0.2); color: var(--x); }
.score.o .token { background: rgba(34, 211, 238, 0.2); color: var(--o); }
.score.draw .token { background: rgba(251, 191, 36, 0.2); color: var(--draw); }

.note {
  margin: 0.4rem 0 0;
  line-height: 1.5;
}

@media (max-width: 960px) {
  .shell {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .game-card,
  .score-card {
    padding: 1.25rem;
  }

  .board {
    gap: 0.65rem;
  }
}