/* Estilos base */
:root {
    --color-primary: #FF6B6B;
    --color-secondary: #4ECDC4;
    --color-accent: #FFE66D;
    --color-background: #F7F9FC;
    --color-text: #2D3436;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

body {
    background-color: var(--color-background);
    min-height: 100vh;
    padding-top: 80px;
}

/* Menú superior */
.menu-principal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    padding: 15px 0;
    box-shadow: var(--shadow-md);
    z-index: 1000;
}

.menu-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.logo h1 {
    color: white;
    font-size: 24px;
}

/* Pantallas de selección */
.pantalla-nivel, .pantalla-categoria {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: var(--color-background);
    z-index: 100;

}

.nivel-container, .categoria-container {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    text-align: center;
    max-width: 800px;
    width: 100%;
}

/* Botones de nivel */
.niveles {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.btn-nivel {
    background: var(--color-primary);
    color: white;
    padding: 20px;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-size: 1.2em;
    transition: transform 0.2s;
}

.btn-nivel:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

/* Grid de categorías */
.categorias-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.btn-categoria {
    background: white;
    border: 2px solid var(--color-primary);
    padding: 20px;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-categoria:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    background: var(--color-primary);
    color: white;
}

.categoria-icon {
    font-size: 2em;
    display: block;
    margin-bottom: 10px;
}

/* Área de juego */
.juego-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Panel de puntuación */
.puntuacion-container {
    background: white;
    padding: 15px 25px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    display: flex;
    justify-content: space-around;
    margin-bottom: 30px;
}

/* Tablero de juego */
.tablero {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 10px;
    margin: 20px auto;
    max-width: 1000px;
}

/* Cartas */
.carta {
    aspect-ratio: 3/4;
    background: white;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.3s ease;
    transform-style: preserve-3d;
    position: relative;
}

.carta.volteada {
    transform: rotateY(180deg);
}

.carta.emparejada {
    transform: rotateY(180deg) scale(0.95);
    opacity: 1;
    pointer-events: none;
}

.carta-frente, .carta-dorso {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
}

.carta-dorso {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    font-size: 2em;
}

.carta-frente {
    background: white;
    transform: rotateY(180deg);
}

.carta-frente img {
    width: 80%;
    height: 80%;
    object-fit: contain;
}

.carta-frente p {
    position: absolute;
    bottom: 5px;
    width: 100%;
    text-align: center;
    font-size: 12px;
    color: var(--color-text);
}

/* Panel de resultados */
.panel-resultados {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    text-align: center;
    z-index: 1000;
}

.resultados-content {
    margin: 20px 0;
}

/* Botones */
.btn-volver, .btn-reiniciar, .btn-menu {
    background: var(--color-accent);
    color: var(--color-text);
    padding: 8px 20px;
    border: none;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 600;
}

.btn-reiniciar {
    background: var(--color-primary);
    color: white;
    margin-right: 10px;
}

/* Responsive */
@media (max-width: 768px) {
    .tablero {
        grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
        gap: 8px;
    }

    .puntuacion-container {
        flex-direction: column;
        align-items: center;
        gap: 10px;
    }

    .carta-frente p {
        font-size: 10px;
    }
}