* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
}

.gallery-container {
    max-width:100%;
    margin: 0 auto;
    background: white;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(245, 244, 244, 0.1);
    padding: 20px;
}

/* Contenedor principal del slider */
.main-slider {
    position: relative;
    width: 100%;
    margin-bottom: 20px;
    border-radius: 8px;
    overflow: hidden;
    background: #f8f9fa;
}

/* Slides con altura automática */
.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s ease-in-out, visibility 0.5s;
}

.slide.active {
    opacity: 1;
    visibility: visible;
    position: relative;
}

/* Imágenes responsivas */
.slide img {
    width: 100%;
    height: auto;
    display: block;
    max-width: 100%;
}

/* Botones de navegación */
.slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0,0,0,0.7);
    color: white;
    border: none;
    padding: 15px 20px;
    font-size: 24px;
    cursor: pointer;
    transition: all 0.3s ease;
    border-radius: 5px;
    z-index: 10;
}

.slider-btn:hover {
    background: rgba(0,0,0,0.9);
    transform: translateY(-50%) scale(1.1);
}

.prev-btn {
    left: 15px;
}

.next-btn {
    right: 15px;
}

/* Contenedor de miniaturas */
.thumbnails {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    padding: 15px 10px;
    background: #f8f9fa;
    border-radius: 8px;
    margin-top: 10px;
}

/* Miniaturas responsivas */
.thumbnail {
    flex: 0 0 auto;
    width: 70px;
    cursor: pointer;
    border: 3px solid transparent;
    border-radius: 6px;
    overflow: hidden;
    transition: all 0.3s ease;
    opacity: 0.6;
}

.thumbnail:hover {
    opacity: 0.8;
    transform: scale(1.05);
}

.thumbnail.active {
    opacity: 1;
    border-color: #007bff;
    transform: scale(1.08);
}

.thumbnail img {
    width: 100%;
    height: auto;
    display: block;
}

/* Indicadores de slide (opcional) */
.slide-indicators {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin: 15px 0;
}

.slide-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #ccc;
    cursor: pointer;
    transition: all 0.3s ease;
}

.slide-indicator.active {
    background: #007bff;
    transform: scale(1.2);
}

/* ===== RESPONSIVE DESIGN ===== */

/* Tablets */
@media (max-width: 1024px) {
    .gallery-container {
        padding: 15px;
    }
    
    .thumbnail {
        width: 85px;
    }
    
    .slider-btn {
        padding: 12px 16px;
        font-size: 20px;
    }
}

/* Tablets pequeñas y móviles grandes */
@media (max-width: 768px) {
    
    .gallery-container {
        padding: 12px;
        border-radius: 8px;
    }
    
    .thumbnail {
        width: 70px;
    }
    
    .slider-btn {
        padding: 10px 14px;
        font-size: 18px;
    }
    
    .prev-btn {
        left: 10px;
    }
    
    .next-btn {
        right: 10px;
    }
    
    .thumbnails {
        gap: 8px;
        padding: 12px 8px;
    }
}

/* Móviles */
@media (max-width: 480px) {
    
    .gallery-container {
        padding: 10px;
        border-radius: 6px;
    }
    
    .thumbnail {
        width: 60px;
    }
    
    .slider-btn {
        padding: 8px 12px;
        font-size: 16px;
    }
    
    .prev-btn {
        left: 8px;
    }
    
    .next-btn {
        right: 8px;
    }
    
    .thumbnails {
        gap: 6px;
        padding: 10px 5px;
    }
}

/* Pantallas muy pequeñas */
@media (max-width: 360px) {
    .thumbnail {
        width: 50px;
    }
    
    .slider-btn {
        padding: 6px 10px;
        font-size: 14px;
    }
}

/* Soporte para orientación landscape en móviles */
@media (max-height: 500px) and (orientation: landscape) {
    .gallery-container {
        max-width: 100%;
    }
    
    .thumbnails {
        padding: 8px 5px;
    }
    
    .thumbnail {
        width: 50px;
    }
}

/* High DPI displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .slide img {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

/* Modo oscuro (opcional) */
@media (prefers-color-scheme: dark) {
    body {
        background-color: #ffffff;
        color: #fff;
    }
    
    .gallery-container {
        background: #0c2552;
    }
    
    .thumbnails {
        background: #0c2552;
    }
}