/* このファイルは、三目並べの見た目を整えます。 */
:root {
  color-scheme: light;
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", sans-serif;
  background-color: #f6f7fb;
  color: #1a1a1a;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
}

.container {
  background: #ffffff;
  padding: 32px 40px;
  border-radius: 16px;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.15);
  width: min(360px, 90vw);
  text-align: center;
}

h1 {
  margin: 0 0 12px;
  font-size: 24px;
}

.status {
  margin: 0 0 20px;
  font-size: 16px;
  color: #334155;
}

.board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 20px;
}

.cell {
  width: 90px;
  height: 90px;
  font-size: 32px;
  font-weight: 700;
  border: 2px solid #cbd5f5;
  border-radius: 12px;
  background: #f8fafc;
  cursor: pointer;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.cell:hover {
  transform: translateY(-2px);
  border-color: #94a3ff;
}

.cell:disabled {
  cursor: not-allowed;
  background: #eef2ff;
  color: #1e293b;
}

.reset {
  border: none;
  padding: 10px 20px;
  border-radius: 999px;
  background: #3b82f6;
  color: #ffffff;
  font-weight: 600;
  cursor: pointer;
}

.reset:hover {
  background: #2563eb;
}