/* ==========================================================================
   Galería: comparadores Antes / Después
   ========================================================================== */

.gallery {
    padding: 5rem 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    position: relative;
}

.instructions {
    background: linear-gradient(135deg, #d4af37, #f1c40f);
    color: var(--color-dark);
    padding: 1.5rem;
    border-radius: 15px;
    text-align: center;
    margin-bottom: 3rem;
    font-size: 1.1rem;
    box-shadow: 0 8px 25px rgba(212, 175, 55, 0.3);
    font-weight: 600;
}

.instructions strong {
    font-size: 1.2em;
    color: var(--color-dark);
}

.before-after-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.comparison-slider {
    position: relative;
    width: 100%;
    height: 300px;
    overflow: hidden;
    border-radius: 20px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.15);
    cursor: grab;
    user-select: none;
    background: #fff;
    border: 3px solid var(--color-gold);
    transition: all 0.4s ease;
}

.comparison-slider:hover {
    box-shadow: 0 25px 60px rgba(212, 175, 55, 0.2);
    transform: translateY(-8px);
}

.comparison-slider:active {
    cursor: grabbing;
}

.slider-images {
    position: relative;
    width: 100%;
    height: 100%;
}

.before-img, .after-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* La imagen "después" se recorta desde la posición del slider hacia la derecha */
.after-img {
    clip-path: polygon(50% 0%, 100% 0%, 100% 100%, 50% 100%);
    transition: clip-path 0.1s ease-out;
}

.slider-line {
    position: absolute;
    top: 0;
    left: 50%;
    width: 4px;
    height: 100%;
    background: linear-gradient(to bottom, #d4af37, #f1c40f, #d4af37);
    transform: translateX(-50%);
    z-index: 10;
    box-shadow: 0 0 15px rgba(212, 175, 55, 0.6);
    transition: left 0.1s ease-out;
}

.slider-handle {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #fff 0%, #f8f9fa 100%);
    border: 3px solid var(--color-gold);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    z-index: 11;
    cursor: grab;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 25px rgba(0,0,0,0.2);
    transition: all 0.2s ease;
}

.slider-handle:hover {
    transform: translate(-50%, -50%) scale(1.15);
    box-shadow: 0 15px 40px rgba(212, 175, 55, 0.4);
}

.slider-handle:active {
    cursor: grabbing;
    transform: translate(-50%, -50%) scale(0.95);
}

/* Flechas del círculo */
.slider-handle::before,
.slider-handle::after {
    content: '';
    position: absolute;
    width: 10px;
    height: 10px;
    border: 2px solid var(--color-dark);
    border-right: none;
    border-bottom: none;
}

.slider-handle::before {
    transform: rotate(-45deg);
    left: 12px;
}

.slider-handle::after {
    transform: rotate(135deg);
    right: 12px;
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 1rem;
    padding: 0 1rem;
}

.label {
    padding: 10px 20px;
    border-radius: 25px;
    font-weight: 700;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    background: linear-gradient(135deg, #d4af37, #b8941f);
    color: white;
    box-shadow: 0 4px 15px rgba(212, 175, 55, 0.3);
    border: none;
    cursor: pointer;
}

.label:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(212, 175, 55, 0.4);
    background: linear-gradient(135deg, #e6c34d, #d4af37);
}

@media (max-width: 768px) {
    .gallery {
        padding: 2.5rem 0;
    }

    .instructions {
        margin: 0 0.8rem 2rem 0.8rem;
        padding: 1rem;
        font-size: 0.9rem;
    }

    .before-after-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        margin-bottom: 2rem;
    }

    .comparison-slider {
        margin: 0 0.4rem;
        border-radius: 15px;
        height: 220px;
        touch-action: pan-x;
    }

    .slider-handle {
        width: 35px;
        height: 35px;
    }

    .slider-handle::before,
    .slider-handle::after {
        width: 7px;
        height: 7px;
        border-width: 2px;
    }

    .slider-handle::before {
        left: 9px;
    }

    .slider-handle::after {
        right: 9px;
    }

    .slider-labels {
        margin-top: 0.6rem;
        padding: 0 0.4rem;
    }

    .label {
        padding: 6px 12px;
        font-size: 0.75rem;
    }
}

@media (max-width: 480px) {
    .comparison-slider {
        margin: 0;
    }

    .instructions {
        margin: 0 0.4rem 1.5rem 0.4rem;
        font-size: 0.8rem;
    }
}