:root {
    --bg-main: #1a1a2e;
    --bg-container: #16213e;
    --bg-card: #6d6567;
    --accent: #00d2ff;
    --text: #ffffff;
}

body {
    background-color: var(--bg-main);
    color: var(--text);
    font-family: 'Segoe UI', Tahoma, sans-serif;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    background: var(--bg-container);
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 15px 40px rgba(0,0,0,0.6);
    text-align: center;
    width: 95%;
    max-width: fit-content;
}

.hidden { display: none; }
.pro-tag { background: var(--accent); color: #1a1a2e; padding: 2px 10px; border-radius: 5px; font-size: 0.9rem; }

.menu-buttons { display: flex; flex-direction: column; gap: 12px; margin-top: 20px; }
.menu-buttons button {
    padding: 15px;
    font-size: 1.1rem;
    font-weight: bold;
    border: 2px solid var(--accent);
    background: transparent;
    color: white;
    border-radius: 12px;
    cursor: pointer;
    transition: 0.3s;
}
.menu-buttons button:hover { background: var(--accent); color: #1a1a2e; }
.btn-insane { border-color: #f1c40f !important; color: #f1c40f !important; }

.game-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 15px; }
.stats-container { display: flex; justify-content: center; gap: 20px; margin-bottom: 20px; }
.stat-box { background: #0f3460; padding: 10px 20px; border-radius: 10px; font-weight: bold; }

.grid {
    display: grid;
    gap: 10px;
    margin: 0 auto;
}

.card {
    width: 75px;
    height: 75px;
    background-color: var(--bg-card);
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    transform-style: preserve-3d;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    position: relative;
}

/* Quando a carta está virada ou combinada, ela mostra a imagem */
.card.flipped, .card.matched {
    transform: rotateY(180deg);
}

.card.matched { opacity: 0.6; cursor: default; }

.btn-reset { margin-top: 25px; padding: 12px 35px; background: var(--accent); border: none; border-radius: 50px; font-weight: bold; cursor: pointer; }
.btn-mini { background: #0f3460; color: white; border: none; padding: 6px 15px; border-radius: 8px; cursor: pointer; }

@media (max-width: 600px) {
    .card { width: 55px; height: 55px; }
    .grid { gap: 6px; }
}