/* ============================================
   K3 WALLS - Homepage Styles
   ============================================ */

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 10, 15, 0.9);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    box-shadow: 0 4px 24px rgba(0, 217, 255, 0.2), 0 0 1px rgba(0, 217, 255, 0.3);
    z-index: 1000;
    transition: all var(--transition-base);
    border-bottom: 1px solid rgba(0, 217, 255, 0.3);
}

.navbar.scrolled {
    box-shadow: 0 8px 32px rgba(0, 217, 255, 0.3), 0 0 2px rgba(255, 0, 110, 0.4);
    background: rgba(10, 10, 15, 0.98);
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
}

.nav-brand {
    display: flex;
    align-items: center;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-family: var(--font-display);
    font-size: var(--font-size-xl);
    color: var(--text-primary);
    transition: transform var(--transition-fast);
}

.brand-text {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: var(--font-size-xl);
    letter-spacing: 0.02em;
    color: var(--primary-color);
    text-shadow: 0 0 10px rgba(0, 217, 255, 0.5);
}

.brand-link:hover {
    transform: scale(1.05);
}

.brand-logo {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    list-style: none;
}

.nav-item {
    position: relative;
}

.nav-link {
    font-weight: 500;
    color: var(--text-secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
    background: rgba(0, 217, 255, 0.15);
    text-shadow: 0 0 10px rgba(0, 217, 255, 0.6);
    transform: translateY(-2px);
    border-radius: 12px;
}

.nav-link-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white !important;
    padding: var(--spacing-sm) var(--spacing-lg);
}

.nav-link-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: var(--font-size-2xl);
    color: var(--text-primary);
    cursor: pointer;
    padding: var(--spacing-sm);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    text-align: left;
    padding-top: 80px;
    overflow: hidden;
    isolation: isolate;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #050508 0%, #0a0a0f 20%, #12121a 40%, #0a0a0f 60%, #050508 80%, #0a0a0f 100%);
    z-index: -2;
}

.hero-background::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 30%, rgba(0, 217, 255, 0.15) 0%, transparent 60%),
        radial-gradient(circle at 80% 70%, rgba(255, 0, 110, 0.15) 0%, transparent 60%),
        radial-gradient(circle at 50% 50%, rgba(123, 44, 191, 0.1) 0%, transparent 70%);
    animation: heroPulse 10s ease-in-out infinite;
}

@keyframes heroPulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

.hero-background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    animation: heroBackgroundShift 15s ease-in-out infinite;
}

@keyframes heroBackgroundShift {
    0%, 100% {
        transform: scale(1) rotate(0deg);
    }
    50% {
        transform: scale(1.1) rotate(5deg);
    }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding: var(--spacing-2xl);
    animation: fadeInUp 1s ease-out;
    margin-right: auto;
}

.orb-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    pointer-events: none;
    z-index: 0;
}

.orb {
    position: absolute;
    border-radius: 50%;
    will-change: transform;
    transform: translateZ(0);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: 900;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.02em;
    overflow: visible;
    text-shadow: 
        0 4px 20px rgba(0, 217, 255, 0.5),
        0 0 40px rgba(0, 217, 255, 0.4),
        0 0 80px rgba(255, 0, 110, 0.3),
        0 0 120px rgba(123, 44, 191, 0.2);
    background: linear-gradient(135deg, #00d9ff 0%, #ff006e 50%, #7b2cbf 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Split text container */
.hero-title.split-text-container {
    display: inline-block;
}

/* Individual characters maintain styling */
.hero-title .split-char {
    background: linear-gradient(135deg, #00d9ff 0%, #ff006e 50%, #7b2cbf 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 
        0 4px 20px rgba(0, 217, 255, 0.5),
        0 0 40px rgba(255, 0, 110, 0.3);
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.hero-trust {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    justify-content: flex-start;
    margin-bottom: var(--spacing-2xl);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.hero-trust span {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.hero-trust i {
    color: var(--primary-color);
    font-size: 1.1em;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: flex-start;
    flex-wrap: wrap;
}

.btn-large {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--font-size-lg);
}

.hero-scroll {
    position: absolute;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
    z-index: 2;
}

@keyframes bounce {
    0%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    50% {
        transform: translateX(-50%) translateY(-10px);
    }
}

.scroll-indicator {
    color: white;
    font-size: var(--font-size-2xl);
    opacity: 0.8;
    transition: opacity var(--transition-fast);
}

.scroll-indicator:hover {
    opacity: 1;
}

/* Section Styles */
section {
    padding: var(--spacing-2xl) 0;
}

.page-header {
    padding-top: 100px;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-title {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: 0;
}

/* Categories Section */
.categories-section {
    background: var(--bg-secondary);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.category-card {
    background: var(--bg-glass);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    text-align: center;
    transition: transform 0.2s ease;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    position: relative;
    isolation: isolate;
    will-change: transform;
    transform: translateZ(0); /* GPU acceleration */
}

.category-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 16px 40px rgba(0, 217, 255, 0.3), 0 8px 24px rgba(255, 0, 110, 0.2), 0 0 30px rgba(0, 217, 255, 0.15);
    border-color: transparent;
    background: rgba(18, 18, 26, 0.95);
}

.category-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 50%, var(--accent-color) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-3xl);
    color: #ffffff;
    box-shadow: 0 8px 24px rgba(0, 217, 255, 0.5), 0 4px 12px rgba(255, 0, 110, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.3);
    transition: all var(--transition-base);
    border: 2px solid rgba(255, 255, 255, 0.1);
}

.category-card:hover .category-icon {
    transform: scale(1.15) rotate(8deg);
    box-shadow: 0 12px 32px rgba(0, 217, 255, 0.6), 0 8px 16px rgba(255, 0, 110, 0.5), 0 0 50px rgba(123, 44, 191, 0.4);
}

.category-card h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
}

.category-card p {
    font-size: var(--font-size-sm);
    margin-bottom: 0;
}

/* Featured Section */
.featured-section {
    background: var(--bg-primary);
}

.wallpaper-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--bg-glass);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.search-wrapper {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex: 1;
    min-width: 200px;
    max-width: 400px;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--bg-secondary);
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
}

.search-wrapper i {
    color: var(--text-light);
}

.search-input {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: var(--font-size-base);
    outline: none;
}

.search-input::placeholder {
    color: var(--text-light);
}

.filter-pills {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.filter-pill {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 100vw;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.filter-pill.active {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-color: transparent;
    color: white;
}

.wallpaper-count {
    font-size: var(--font-size-sm);
    color: var(--text-light);
    margin: 0;
}

.wallpaper-card .wallpaper-image {
    cursor: pointer;
}

.wallpapers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    contain: layout style;
}

.wallpaper-card {
    background: var(--bg-glass);
    backdrop-filter: blur(10px) saturate(180%);
    -webkit-backdrop-filter: blur(10px) saturate(180%);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: transform 0.2s ease;
    border: 1px solid var(--border-color);
    position: relative;
    transform: translateZ(0);
}

.wallpaper-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 48px rgba(0, 217, 255, 0.35), 0 12px 24px rgba(255, 0, 110, 0.25), 0 0 40px rgba(0, 217, 255, 0.2);
    border-color: transparent;
}

.wallpaper-image {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 aspect ratio */
    overflow: hidden;
    background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-secondary) 100%);
}

.wallpaper-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-base);
}

.wallpaper-card:hover .wallpaper-image img {
    transform: scale(1.05);
}

.placeholder-image {
    background: linear-gradient(135deg, rgba(0, 217, 255, 0.2), rgba(255, 0, 110, 0.2)) !important;
}

.placeholder-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 217, 255, 0.8), rgba(255, 0, 110, 0.8));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-2xl);
}

.wallpaper-info {
    padding: var(--spacing-lg);
}

.wallpaper-info h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-sm);
}

.wallpaper-meta {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.wallpaper-meta span {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.btn-sm {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-sm);
}

.wallpaper-card.hidden {
    display: none;
}

/* Lightbox */
.lightbox {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.95);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lightbox-close {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--border-color);
    color: white;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: all var(--transition-fast);
}

.lightbox-close:hover {
    background: rgba(255, 255, 255, 0.2);
}

.lightbox-content {
    max-width: 90vw;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
}

.lightbox-content img {
    max-width: 100%;
    max-height: 75vh;
    object-fit: contain;
    border-radius: var(--border-radius);
}

.lightbox-info {
    text-align: center;
}

.lightbox-info h3 {
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-xl);
}

/* Livepaper Section */
.livepaper-section {
    background: var(--bg-primary);
    padding: var(--spacing-2xl) 0;
}

.livepaper-teaser {
    text-align: center;
    max-width: 560px;
    margin: 0 auto;
    padding: var(--spacing-xl) 0;
}

.livepaper-teaser p {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.livepapers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(364px, 1fr));
    gap: var(--spacing-xl);
}

.livepaper-card {
    background: var(--bg-glass);
    backdrop-filter: blur(10px) saturate(180%);
    -webkit-backdrop-filter: blur(10px) saturate(180%);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: transform 0.2s ease;
    border: 1px solid var(--border-color);
    position: relative;
    will-change: transform;
    transform: translateZ(0); /* GPU acceleration */
}

.livepaper-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 48px rgba(0, 217, 255, 0.35), 0 12px 24px rgba(255, 0, 110, 0.25), 0 0 40px rgba(0, 217, 255, 0.2);
    border-color: transparent;
}

.livepaper-video-wrapper {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 aspect ratio - Full HD/4K resolution (1920x1080 / 3840x2160) matching motionbgs.com */
    overflow: hidden;
    background: var(--bg-dark);
    min-height: 200px; /* Minimum height for very small screens */
    border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.livepaper-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    background: var(--bg-dark);
    /* Ensure full resolution display like motionbgs.com */
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

.livepaper-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 158, 200, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
    cursor: pointer;
}

.livepaper-card:hover .livepaper-overlay {
    opacity: 1;
}

.play-pause-btn {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border: 2px solid rgba(255, 255, 255, 0.2);
    color: #ffffff;
    font-size: var(--font-size-2xl);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: 0 8px 24px rgba(0, 217, 255, 0.5), 0 4px 12px rgba(255, 0, 110, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.play-pause-btn:hover {
    transform: scale(1.15);
    box-shadow: 0 12px 32px rgba(0, 217, 255, 0.6), 0 8px 16px rgba(255, 0, 110, 0.5), 0 0 40px rgba(123, 44, 191, 0.4);
}

.livepaper-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 50%, var(--accent-color) 100%);
    color: #ffffff;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius);
    font-size: var(--font-size-xs);
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    box-shadow: 0 4px 16px rgba(0, 217, 255, 0.5), 0 2px 8px rgba(255, 0, 110, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.2);
    z-index: 2;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

/* About Section */
.about-section {
    background: var(--bg-secondary);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
}

.feature-item i {
    color: var(--primary-color);
    font-size: var(--font-size-xl);
}

/* Footer */
.footer {
    background: var(--bg-dark);
    color: var(--text-primary);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
    border-top: 1px solid rgba(0, 217, 255, 0.2);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h3,
.footer-section h4 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.footer-section p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 217, 255, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 217, 255, 0.3);
    border-radius: 50%;
    color: var(--primary-color);
    font-size: var(--font-size-lg);
    transition: all var(--transition-base);
}

.social-link:hover {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #ffffff;
    transform: translateY(-4px) scale(1.1);
    box-shadow: 0 8px 20px rgba(0, 217, 255, 0.5), 0 4px 12px rgba(255, 0, 110, 0.4);
    border-color: var(--primary-color);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-color);
    text-shadow: 0 0 8px rgba(0, 217, 255, 0.5);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(0, 217, 255, 0.2);
}

.footer-bottom p {
    color: var(--text-secondary);
    margin-bottom: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-lg);
        transform: translateX(-100%);
        transition: transform var(--transition-base);
    }

    .nav-menu.active {
        transform: translateX(0);
    }

    .nav-toggle {
        display: block;
    }

    .hero-title {
        font-size: var(--font-size-3xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-base);
    }

    .hero-actions {
        flex-direction: column;
    }

    .categories-grid,
    .wallpapers-grid,
    .livepapers-grid {
        grid-template-columns: 1fr;
    }
    
    .livepaper-video-wrapper {
        padding-top: 56.25%; /* Maintain 16:9 aspect ratio on mobile - Full HD resolution (1920x1080) like motionbgs.com */
        min-height: 200px;
    }
    
    .livepapers-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
}