/* Estilos para las tarjetas del juego de memoria */

.tarjeta {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    cursor: pointer;
    perspective: 1000px;
    border-radius: 12px;
    transition: transform 0.2s ease;
}

.tarjeta:hover {
    transform: scale(1.05);
}

.tarjeta-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.6s;
    transform-style: preserve-3d;
    border-radius: 12px;
}

.tarjeta.volteada .tarjeta-inner {
    transform: rotateY(180deg);
}

.tarjeta-front,
.tarjeta-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: bold;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    border: 3px solid #2c3e50;
}

/* Cara frontal (boca abajo) */
.tarjeta-front {
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: white;
}

.tarjeta-front::before {
    content: "?";
    font-size: 3rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

/* Cara trasera (boca arriba) */
.tarjeta-back {
    background: linear-gradient(135deg, #e74c3c, #c0392b);
    color: white;
    transform: rotateY(180deg);
}

/* Estados especiales */
.tarjeta.matched {
    animation: matchPulse 0.6s ease-in-out;
}

.tarjeta.matched .tarjeta-front,
.tarjeta.matched .tarjeta-back {
    background: linear-gradient(135deg, #27ae60, #229954);
    border-color: #1e8449;
}

.tarjeta.disabled {
    pointer-events: none;
    opacity: 0.7;
}

/* Animaciones */
@keyframes matchPulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    25% {
        transform: translateX(-5px);
    }
    75% {
        transform: translateX(5px);
    }
}

.tarjeta.no-match {
    animation: shake 0.5s ease-in-out;
}

/* Responsive design */
@media (max-width: 768px) {
    .tarjeta-front::before {
        font-size: 2rem;
    }
    
    .tarjeta-front,
    .tarjeta-back {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .tarjeta-front::before {
        font-size: 1.5rem;
    }
    
    .tarjeta-front,
    .tarjeta-back {
        font-size: 1.2rem;
    }
}