/* Base layout and theme */
:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --x: #38bdf8;
  --o: #f472b6;
  --accent: #22c55e;
  --cell: #334155;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.container {
  text-align: center;
  padding: 2rem;
}

h1 {
  margin: 0 0 0.5rem;
  font-size: 2.25rem;
}

.status {
  margin: 0 0 1.5rem;
  color: var(--muted);
  font-size: 1.1rem;
  min-height: 1.5em;
}

/* 3x3 grid */
.board {
  display: grid;
  grid-template-columns: repeat(3, 100px);
  grid-template-rows: repeat(3, 100px);
  gap: 8px;
  margin: 0 auto 1.5rem;
  width: max-content;
}

.cell {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--cell);
  border: none;
  border-radius: 12px;
  font-size: 3rem;
  font-weight: 700;
  cursor: pointer;
  color: var(--text);
  transition: background 0.15s ease, transform 0.1s ease;
}

.cell:hover:not(:disabled) {
  background: #475569;
}

.cell:active:not(:disabled) {
  transform: scale(0.96);
}

.cell:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.cell:disabled {
  cursor: default;
}

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

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

.cell.win {
  background: var(--accent);
  color: var(--bg);
}

/* Score board */
.scores {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.score {
  background: var(--panel);
  border-radius: 10px;
  padding: 0.6rem 1rem;
  min-width: 100px;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.score span {
  color: var(--muted);
  font-size: 0.85rem;
}

.score strong {
  font-size: 1.4rem;
}

/* Reset button */
.reset {
  background: var(--accent);
  color: var(--bg);
  border: none;
  border-radius: 8px;
  padding: 0.7rem 1.6rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

.reset:hover {
  filter: brightness(1.1);
}

.reset:focus-visible {
  outline: 3px solid var(--text);
  outline-offset: 2px;
}

@media (max-width: 400px) {
  .board {
    grid-template-columns: repeat(3, 80px);
    grid-template-rows: repeat(3, 80px);
  }

  .cell {
    font-size: 2.2rem;
  }
}