/* HD Wallpapers Gallery - Styles */

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --bg: #0f172a;
    --bg-light: #1e293b;
    --text: #f1f5f9;
    --text-muted: #94a3b8;
    --border: #334155;
    --card-bg: #1e293b;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: var(--bg-light);
    border-bottom: 1px solid var(--border);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    font-size: 2rem;
}

.logo-text h1 {
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-text p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.nav {
    display: flex;
    gap: 25px;
}

.nav a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.nav a:hover,
.nav a.active {
    color: var(--primary);
}

/* Hero */
.hero {
    padding: 60px 0 40px;
    text-align: center;
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.hero p {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 30px;
}

/* Category Filter */
.categories-filter {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
}

.filter-btn {
    background: var(--bg-light);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 10px 20px;
    border-radius: 25px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s;
}

.filter-btn:hover {
    border-color: var(--primary);
}

.filter-btn.active {
    background: var(--primary);
    border-color: var(--primary);
}

/* Gallery Grid */
.gallery {
    padding: 40px 0;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.gallery-item {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    aspect-ratio: 16/10;
    cursor: pointer;
    transition: transform 0.3s;
}

.gallery-item:hover {
    transform: scale(1.02);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.gallery-item .overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
    padding: 40px 15px 15px;
    opacity: 0;
    transition: opacity 0.3s;
}

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

.gallery-item .overlay h4 {
    font-size: 0.95rem;
    margin-bottom: 5px;
}

.gallery-item .overlay p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.loading {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px;
    color: var(--text-muted);
}

/* Load More */
.load-more {
    text-align: center;
    margin-top: 40px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
}

/* Info Section */
.info {
    padding: 60px 0;
    background: var(--bg-light);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.info-card {
    text-align: center;
    padding: 30px;
}

.info-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
    display: block;
}

.info-card h3 {
    margin-bottom: 10px;
}

.info-card p {
    color: var(--text-muted);
}

/* Footer */
.footer {
    padding: 40px 0 20px;
    border-top: 1px solid var(--border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 20px;
}

.footer-links {
    display: flex;
    gap: 20px;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
}

.footer-links a:hover {
    color: var(--text);
}

.footer-bottom {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-bottom a {
    color: var(--primary);
}

/* Lightbox */
.lightbox {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.95);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    padding: 20px;
}

.lightbox.active {
    display: flex;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 30px;
    font-size: 2.5rem;
    color: white;
    background: none;
    border: none;
    cursor: pointer;
}

.lightbox img {
    max-width: 90%;
    max-height: 80vh;
    object-fit: contain;
    border-radius: 8px;
}

.lightbox-info {
    margin-top: 20px;
    text-align: center;
}

.lightbox-info h3 {
    margin-bottom: 15px;
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 15px;
    }

    .nav {
        gap: 15px;
    }

    .hero h2 {
        font-size: 1.8rem;
    }

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

    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}