/* Mobile-first CSS */
.gallery-container {
    padding: 20px 10px;
}

.gallery-item {
    margin-bottom: 15px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.gallery-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.gallery-item:hover img {
    transform: scale(1.05);
}

.image-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.7));
    color: white;
    padding: 15px;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.gallery-item:hover .image-overlay {
    transform: translateY(0);
}

/* Modal Styles */
.modal-dialog {
    max-width: 90vw;
    margin: 20px auto;
}

.modal-content {
    background: #000;
    border: none;
    border-radius: 10px;
}

.modal-header {
    border-bottom: 1px solid #333;
    background: rgba(255,255,255,0.1);
}

.modal-title {
    color: white;
    font-size: 1.2rem;
}

.btn-close {
    filter: invert(1);
}

.modal-body {
    padding: 0;
    text-align: center;
}

.popup-image {
    width: 100%;
    max-height: 70vh;
    object-fit: contain;
}

.nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255,255,255,0.8);
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 20px;
    cursor: pointer;
    transition: background 0.3s ease;
    z-index: 1060;
}

.nav-btn:hover {
    background: rgba(255,255,255,1);
}

.nav-btn.prev {
    left: 20px;
}

.nav-btn.next {
    right: 20px;
}

.image-counter {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0,0,0,0.7);
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 14px;
}

/* Tablet and Desktop */
@media (min-width: 768px) {
    .gallery-container {
        padding: 30px 20px;
    }

    .gallery-item {
        margin-bottom: 20px;
    }

    .gallery-item img {
        height: 250px;
    }

    .modal-dialog {
        max-width: 80vw;
        margin: 50px auto;
    }

    .nav-btn {
        width: 60px;
        height: 60px;
        font-size: 24px;
    }
}

@media (min-width: 992px) {
    .gallery-item img {
        height: 300px;
    }

    .modal-dialog {
        max-width: 70vw;
    }
}