:root {
  --bg: var(--ui-bg);
  --bg-soft: var(--ui-bg-soft);
  --surface: var(--ui-surface);
  --border: var(--ui-border);
  --text: var(--ui-text);
  --muted: var(--ui-muted);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: "Sora", "Segoe UI", sans-serif;
  background: linear-gradient(145deg, var(--bg), var(--bg-soft));
}

.layout { width: min(720px, calc(100% - 1rem)); margin: 1rem auto; display: grid; gap: 1rem; }

.top,
.game-panel {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 18px;
  padding: 0.9rem;
}

.top { display: grid; gap: 0.45rem; }

h1, #status, #scoreboard { margin: 0; }

#status { color: var(--muted); }
#scoreboard { color: #bfdbfe; font-size: 0.95rem; }

.game-panel { display: grid; gap: 0.85rem; justify-items: center; }

.board {
  display: grid;
  grid-template-columns: repeat(3, 100px);
  gap: 0.55rem;
}

.cell {
  width: 100px;
  height: 100px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.9);
  color: var(--text);
  font-size: 2.1rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 130ms ease, border-color 130ms ease;
}

.cell:hover {
  transform: translateY(-2px);
  border-color: rgba(56, 189, 248, 0.55);
}

button {
  border: 1px solid rgba(56, 189, 248, 0.5);
  border-radius: 999px;
  background: rgba(56, 189, 248, 0.15);
  color: var(--text);
  padding: 0.5rem 0.9rem;
  cursor: pointer;
}