:root {
  --bg: #f3f8ff;
  --card: #ffffff;
  --primary: #0b5ed7;
  --primary-hover: #0949a6;
  --accent: #ff8c42;
  --text: #1f2a44;
  --muted: #5d6b86;
  --success: #1b8f4e;
  --danger: #c93434;
  --shadow: 0 12px 30px rgba(11, 94, 215, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(155deg, #e9f3ff 0%, var(--bg) 55%, #fff9f2 100%);
  color: var(--text);
}

.container {
  width: min(900px, 92vw);
  margin: 0 auto;
  padding: 32px 0 40px;
}

.hero {
  text-align: center;
  margin-bottom: 18px;
}

.hero h1 {
  margin: 0 0 10px;
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
}

.hero p {
  margin: 0;
  color: var(--muted);
}

.game-card {
  background: var(--card);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 22px;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.stat {
  border-radius: 12px;
  background: #f7fbff;
  border: 1px solid #d9e9ff;
  padding: 10px;
  text-align: center;
}

.label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 6px;
}

.value {
  font-size: 1.45rem;
  font-weight: 700;
}

.hint {
  margin: 16px 0;
  padding: 10px 12px;
  border-left: 4px solid var(--accent);
  background: #fff7ee;
  border-radius: 8px;
  color: #704623;
}

.controls {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.action,
.restart {
  border: 0;
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 0.98rem;
  cursor: pointer;
  transition: transform 0.12s ease, background 0.2s ease, opacity 0.2s ease;
}

.action {
  background: var(--primary);
  color: #fff;
}

.action:hover:enabled {
  background: var(--primary-hover);
  transform: translateY(-1px);
}

.action:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 18px;
}

.restart {
  background: #edf2ff;
  color: #304ea1;
  border: 1px solid #cbdbff;
}

.restart:hover {
  background: #dfe9ff;
}

.message {
  margin: 0;
  font-weight: 600;
  min-height: 1.5em;
}

.message.win {
  color: var(--success);
}

.message.lose {
  color: var(--danger);
}

@media (max-width: 640px) {
  .stats,
  .controls {
    grid-template-columns: 1fr;
  }
}