:root {
    
    --bg-primary: #fafafa;
    --bg-card: #ffffff;
    --text-primary: #1a1a2e;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    
    
    --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    --gradient-hero: linear-gradient(to bottom, transparent 0%, rgba(0,0,0,0.9) 100%);
    
    
    --color-tech: #3b82f6;
    --color-game: #10b981;
    --color-sport: #ef4444;
    --color-science: #8b5cf6;
    --color-mobile: #f59e0b;
    
    
    --border-color: rgba(0, 0, 0, 0.08);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.15);
    
  
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
   
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
   
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-heading: 'Lexend', var(--font-sans);
}

body.dark-mode {
    --bg-primary: #1a1a2e;
    --bg-card: #25273d;
    --text-primary: #fafafa;
    --text-secondary: #d1d5db;
    --text-muted: #9ca3af;
    --border-color: rgba(255, 255, 255, 0.1);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.6);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.3s ease, color 0.3s ease;
}


.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1rem;
}

.main-container {
    padding-top: 2rem;
    padding-bottom: 2rem;
}

.layout {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.sidebar {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.main-content {
    flex: 1;
    min-width: 0;
}

@media (min-width: 768px) {
    .sidebar {
        width: 288px;
        position: sticky;
        top: 6rem;
        align-self: flex-start;
    }
}


.header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

body.dark-mode .header {
    background: rgba(26, 26, 46, 0.8);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    height: 4rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-lg);
    transition: all 0.2s ease;
}

.logo:hover {
    background: rgba(0, 0, 0, 0.03);
}

body.dark-mode .logo:hover {
    background: rgba(255, 255, 255, 0.05);
}

.logo-icon {
    background: var(--gradient-primary);
    padding: 0.5rem;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-icon i {
    font-size: 1.25rem;
    color: white;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 700;
    background: var(--gradient-primary);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-desktop {
    display: none;
    gap: 0.25rem;
}

@media (min-width: 768px) {
    .nav-desktop {
        display: flex;
    }
}

.nav-link {
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: transparent;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
}

.nav-link:hover {
    background: rgba(0, 0, 0, 0.04);
}

body.dark-mode .nav-link:hover {
    background: rgba(255, 255, 255, 0.06);
}

.nav-link.active {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.header-actions {
    display: flex;
    gap: 0.5rem;
}

.icon-btn {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.icon-btn:hover {
    background: rgba(0, 0, 0, 0.04);
    color: var(--text-primary);
}

body.dark-mode .icon-btn:hover {
    background: rgba(255, 255, 255, 0.06);
}


.sidebar-card {
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
}

body.dark-mode .sidebar-card {
    background: rgba(37, 39, 61, 0.6);
}

.sidebar-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.sidebar-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    border-radius: var(--radius-lg);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
    width: 100%;
    text-decoration: none; 
}

.sidebar-item:hover {
    background: rgba(0, 0, 0, 0.04);
    transform: translateX(4px);
}

body.dark-mode .sidebar-item:hover {
    background: rgba(255, 255, 255, 0.06);
}

.sidebar-item i {
    font-size: 1.25rem;
}

.icon-tech { color: var(--color-tech); }
.icon-game { color: var(--color-game); }
.icon-sport { color: var(--color-sport); }
.icon-science { color: var(--color-science); }
.icon-mobile { color: var(--color-mobile); }

.trending-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.trending-item {
    display: flex;
    gap: 0.75rem;
    padding: 0.5rem;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all 0.2s ease;
}

.trending-item:hover {
    background: rgba(0, 0, 0, 0.03);
}

body.dark-mode .trending-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

.trending-item img {
    width: 4rem;
    height: 4rem;
    border-radius: var(--radius-md);
    object-fit: cover;
    flex-shrink: 0;
}

.trending-content {
    flex: 1;
    min-width: 0;
}

.trending-content h3 {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.trending-date {
    font-size: 0.75rem;
    color: var(--text-muted);
}


.hero-article {
    position: relative;
    height: 500px;
    border-radius: var(--radius-xl);
    overflow: hidden;
    cursor: pointer;
    margin-bottom: 3rem;
    box-shadow: var(--shadow-lg);
}

.hero-article img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.7s ease;
}

.hero-article:hover img {
    transform: scale(1.05);
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: var(--gradient-hero);
}

.hero-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 3rem;
    z-index: 2;
}

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: white;
    margin-bottom: 1rem;
    box-shadow: var(--shadow-md);
}

.badge-tech { background: var(--color-tech); }
.badge-game { background: var(--color-game); }
.badge-sport { background: var(--color-sport); }
.badge-science { background: var(--color-science); }
.badge-mobile { background: var(--color-mobile); }

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(1.5rem, 4vw, 3rem);
    font-weight: 700;
    color: white;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-excerpt {
    font-size: clamp(0.875rem, 2vw, 1.125rem);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 1rem;
    max-width: 48rem;
    line-height: 1.6;
}

.hero-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.875rem;
}


.section-header {
    margin-bottom: 1.5rem;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--text-primary);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

@media (min-width: 1024px) {
    .news-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.news-card {
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    cursor: pointer; 
    transition: all 0.3s ease;
    opacity: 0;
    animation: fadeInUp 0.6s ease-out forwards;
}

body.dark-mode .news-card {
    background: rgba(37, 39, 61, 0.6);
}

.news-card:nth-child(1) { animation-delay: 0.1s; }
.news-card:nth-child(2) { animation-delay: 0.2s; }
.news-card:nth-child(3) { animation-delay: 0.3s; }
.news-card:nth-child(4) { animation-delay: 0.4s; }
.news-card:nth-child(5) { animation-delay: 0.5s; }
.news-card:nth-child(6) { animation-delay: 0.6s; }

.news-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.news-image {
    position: relative;
    height: 12rem;
    overflow: hidden;
}

.news-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.news-card:hover .news-image img {
    transform: scale(1.1);
}

.news-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-lg);
    font-size: 0.75rem;
    font-weight: 600;
    color: white;
    box-shadow: var(--shadow-md);
}

.news-content {
    padding: 1.5rem;
}

.news-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: color 0.2s ease;
}

.news-card:hover .news-title {
    color: var(--color-tech);
}

.news-excerpt {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-muted);
    font-size: 0.75rem;
}


.footer {
    background: linear-gradient(to bottom, var(--bg-primary), var(--bg-card));
    border-top: 1px solid var(--border-color);
    margin-top: 4rem;
    padding: 3rem 0 1.5rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.footer-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.footer-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.footer-links ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.2s ease;
}

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

.social-links {
    display: flex;
    gap: 0.5rem;
}

.social-btn {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s ease;
    box-shadow: var(--shadow-sm);
}

.social-btn:hover {
    background: var(--gradient-primary);
    color: white;
    transform: translateY(-2px);
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.875rem;
    color: var(--text-muted);
}


@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}


::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}


.news-item {
    text-decoration: none;
}