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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f5f5;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

h1 {
    font-size: 28px;
    color: #333;
}

.search-container {
    display: flex;
}

#search-input {
    padding: 10px 15px;
    border: 1px solid #ddd;
    border-radius: 4px 0 0 4px;
    font-size: 16px;
    width: 300px;
}

#search-btn {
    padding: 10px 20px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
    font-size: 16px;
}

.categories {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.category-btn {
    padding: 8px 16px;
    background-color: #eee;
    border: none;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s;
}

.category-btn:hover {
    background-color: #ddd;
}

.category-btn.active {
    background-color: #4CAF50;
    color: white;
}

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

.wallpaper-item {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    transition: transform 0.3s;
}

.wallpaper-item:hover {
    transform: translateY(-5px);
}

.wallpaper-item img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    display: block;
}

.wallpaper-info {
    padding: 10px;
    background-color: white;
}

.wallpaper-info h3 {
    font-size: 16px;
    margin-bottom: 5px;
}

.wallpaper-info p {
    font-size: 14px;
    color: #666;
}

.preview-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

#preview-image {
    max-width: 90%;
    max-height: 80%;
    border-radius: 8px;
    margin-bottom: 20px;
}

.close-btn {
    position: absolute;
    top: 20px;
    right: 30px;
    color: white;
    font-size: 40px;
    cursor: pointer;
}

#download-btn {
    padding: 10px 20px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
}

@media (max-width: 768px) {
    header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .search-container {
        margin-top: 15px;
        width: 100%;
    }
    
    #search-input {
        width: 70%;
    }
    
    .wallpapers-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
}