:root{
  --bg1: #ff6f61;
  --bg2: #ffcc70;
  --accent: #333;
  --accent-2: #ffcc70;
  --card-size: 80px;
}

*{box-sizing:border-box}
body {
  font-family: 'Arial', sans-serif;
  background: linear-gradient(135deg, var(--bg1), var(--bg2));
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
  margin: 0;
  color: #fff;
  padding: 20px;
}

h1 { margin: 10px 0 20px; text-shadow: 2px 2px rgba(0,0,0,0.25); }

#menu, #game, #ranking { width: 100%; max-width: 900px; margin-bottom: 20px; text-align: center; }

.info-row { display:flex; gap:20px; justify-content:center; flex-wrap:wrap; margin-bottom:10px; }
.controls { display:flex; gap:10px; justify-content:center; align-items:center; margin-bottom:10px; flex-wrap:wrap; }

#game-board {
  display: grid;
  grid-gap: 12px;
  margin: 10px auto;
  justify-content: center;
  padding: 10px;
}

.card {
  width: var(--card-size);
  height: var(--card-size);
  perspective: 600px;
  cursor: pointer;
}

.card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.5s;
  transform-style: preserve-3d;
  border-radius: 8px;
}

.card.flipped .card-inner { transform: rotateY(180deg); }

.card-front, .card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: 8px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size: 2rem;
  user-select: none;
}

.card-front {
  background: #fff;
  color: var(--accent);
  transform: rotateY(180deg);
}

.card-back {
  background: var(--accent);
  color: var(--accent-2);
}

button {
  background: var(--accent);
  color: var(--accent-2);
  border: none;
  padding: 8px 14px;
  font-size: 0.95rem;
  border-radius: 6px;
  cursor: pointer;
}

button:hover { background: var(--accent-2); color: var(--accent); }

#ranking ol { text-align:left; max-width:420px; margin: 0 auto 10px; padding-left: 18px; color:#fff; }
.ranking-controls { margin-top: 8px; }

@media (max-width:600px){
  :root{ --card-size: 64px; }
  .info-row { font-size: 0.9rem; gap:10px; }
}