:root {
    --fondo-oscuro: #1b1b2f;
    --texto: #ffffff;
    --borde: rgba(255, 255, 255, 0.2);
}

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

.contenedor-menu {
    text-align: center;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 40px;
    border: 2px solid var(--borde);
    box-shadow: 0 15px 35px rgba(0,0,0,0.5);
    max-width: 1100px;
    width: 95%;
}

h1 {
    font-family: 'Fredoka One', cursive;
    color: #FFD166;
    font-size: 3rem;
    margin-bottom: 10px;
    text-shadow: 2px 4px 6px rgba(0,0,0,0.3);
}

p {
    font-size: 1.5rem;
    color: #A8DACC;
    margin-bottom: 40px;
}

.tarjetas-juegos {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
    justify-content: center;
    width: 100%;
}

@media (max-width: 980px) {
    .tarjetas-juegos {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .tarjetas-juegos {
        grid-template-columns: 1fr;
    }
}

.tarjeta {
    background: rgba(255, 255, 255, 0.1);
    border: 3px solid transparent;
    border-radius: 20px;
    padding: 25px;
    box-sizing: border-box;
    text-decoration: none;
    color: white;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.tarjeta::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    opacity: 0.1;
    z-index: 0;
    transition: opacity 0.3s;
}

.math-tarjeta::before { background: #FF6B6B; }
.space-tarjeta::before { background: #4ECDC4; }

.tarjeta:hover {
    transform: translateY(-10px);
    border-color: rgba(255,255,255,0.5);
    box-shadow: 0 10px 20px rgba(0,0,0,0.4);
}

.tarjeta:hover::before {
    opacity: 0.2;
}

.icono {
    font-size: 5rem;
    margin-bottom: 15px;
    z-index: 1;
}

.tarjeta h2 {
    font-family: 'Fredoka One', cursive;
    font-size: 1.8rem;
    margin: 10px 0;
    z-index: 1;
}

.tarjeta p {
    font-size: 1.1rem;
    color: #f1f2f6;
    margin: 0;
    z-index: 1;
}

.math-tarjeta h2 { color: #FF6B6B; }
.space-tarjeta h2 { color: #4ECDC4; }