body {
    margin: 0;
    font-family: 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    background: #111827;
    padding: 20px;
    border-radius: 16px;
    text-align: center;
    width: 380px;
    color: #e5e7eb;
    box-shadow: 0 15px 30px rgba(0,0,0,0.6);
}

.info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    font-size: 14px;
}

select, button {
    background: #2563eb;
    color: white;
    border: none;
    padding: 6px 8px;
    border-radius: 6px;
    cursor: pointer;
}

button:hover, select:hover {
    background: #1d4ed8;
}

.tabuleiro {
    display: grid;
    gap: 10px;
    justify-content: center;
}

/* CARTA 3D */
.carta {
    width: 70px;
    height: 70px;
    perspective: 1000px;
}

.carta-inner {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.6s;
    cursor: pointer;
}

.carta.virada .carta-inner {
    transform: rotateY(180deg);
}

.face {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    backface-visibility: hidden;
}

.frente {
    background: #22d3ee;
}

.verso {
    background: #10b981;
    transform: rotateY(180deg);
}

.carta.acertou .verso {
    background: #16a34a;
}