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

body {
    font-family: 'Arial', sans-serif;
    background: url('back.jpg') center/cover fixed;
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.95);
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

h1 {
    text-align: center;
    margin-bottom: 30px;
    color: #333;
    font-size: 2.5em;
}

.controls {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
    gap: 20px;
}

.search-box {
    position: relative;
    flex-grow: 1;
}

.search-box input {
    width: 100%;
    padding: 10px 40px 10px 15px;
    border: 2px solid #ddd;
    border-radius: 25px;
    font-size: 16px;
    transition: border-color 0.3s;
}

.search-box i {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: #666;
}

button {
    padding: 10px 20px;
    border: none;
    border-radius: 25px;
    background: #4CAF50;
    color: white;
    cursor: pointer;
    transition: transform 0.2s, background 0.3s;
}

button:hover {
    background: #45a049;
    transform: translateY(-2px);
}

.filter-options {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    justify-content: center;
}

.filter-options button {
    padding: 8px 16px;
    border: none;
    border-radius: 25px;
    background: #4CAF50;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-options button:hover {
    background: #45a049;
    transform: translateY(-2px);
}

.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    padding: 20px 0;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: 15px;
    cursor: pointer;
    transition: transform 0.4s cubic-bezier(0.165, 0.84, 0.44, 1), 
                box-shadow 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    background: white;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    aspect-ratio: 1;
}

.gallery-item:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.gallery-item:hover img {
    transform: scale(1.08);
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.overlay i {
    color: white;
    font-size: 2em;
    transform: scale(0.8);
    transition: transform 0.3s ease;
}

.gallery-item:hover .overlay {
    opacity: 1;
}

.gallery-item:hover .overlay i {
    transform: scale(1);
}

/* Lightbox styles */
.lightbox {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.lightbox.active {
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
}

.lightbox-content {
    position: relative;
    max-width: 90%;
    max-height: 90vh;
    margin: 0 auto;
}

.lightbox img {
    max-width: 100%;
    max-height: 90vh;
    border-radius: 8px;
    transform: scale(0.95);
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.lightbox.active img {
    transform: scale(1);
}

/* Navigation Buttons */
.nav-btn {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    color: white;
    font-size: 1.2em;
    opacity: 0.7;
}

.nav-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    opacity: 1;
    transform: translateY(-50%) scale(1.1);
}

.prev-btn {
    left: 20px;
}

.next-btn {
    right: 20px;
}

/* Close Button */
.close-btn {
    position: fixed;
    top: 15px;
    right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    z-index: 1010;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: 0.3s;
}

.close-btn:hover {
    color: #bbb;
    transform: rotate(90deg);
}

/* Button Icons */
.nav-btn i, .close-btn i {
    transition: transform 0.3s ease;
}

.prev-btn:hover i {
    transform: translateX(-3px);
}

.next-btn:hover i {
    transform: translateX(3px);
}

/* Image Transition Animations */
@keyframes slideRight {
    from {
        transform: translateX(-100px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideLeft {
    from {
        transform: translateX(100px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.slide-right {
    animation: slideRight 0.4s ease-out;
}

.slide-left {
    animation: slideLeft 0.4s ease-out;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .nav-btn {
        width: 40px;
        height: 40px;
        font-size: 1em;
    }

    .close-btn {
        width: 35px;
        height: 35px;
        font-size: 1em;
    }

    .prev-btn {
        left: 10px;
    }

    .next-btn {
        right: 10px;
    }
}

/* Responsive design */
@media (max-width: 768px) {
    .gallery {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 15px;
    }

    .gallery-item:hover {
        transform: translateY(-5px) scale(1.01);
    }
}

/* Loading animation */
.loading {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1000;
}

.loading i {
    color: #4CAF50;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}