:root {
    --bg-dark: #ffffff;
    --bg-card: #f8f9fa;
    --bg-elevated: #e9ecef;
    --border: #dee2e6;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --accent-purple: #8b5cf6;
    --accent-green: #22c55e;
    --accent-cyan: #06b6d4;
    --gradient: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
    --radius: 12px;
    --transition: 0.25s ease;
}

[data-theme="dark"] {
    --bg-dark: #0a0a0f;
    --bg-card: #12121a;
    --bg-elevated: #1a1a25;
    --border: #2a2a3a;
    --text-primary: #f0f0f5;
    --text-secondary: #8888a0;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

a {
    text-decoration: none;
    color: inherit;
}

img {
    max-width: 100%;
    display: block;
}

.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

[data-theme="dark"] .header {
    background: rgba(10, 10, 15, 0.85);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 32px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.4rem;
}

.logo-icon {
    font-size: 1.5rem;
}

.logo-text {
    background: var(--gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-link {
    padding: 10px 18px;
    border-radius: 8px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
    background: var(--bg-elevated);
}

.nav-link.active {
    color: var(--accent-purple);
}

.search-wrapper {
    display: flex;
    align-items: center;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px 12px;
    gap: 8px;
    transition: var(--transition);
}

.search-wrapper:focus-within {
    border-color: var(--accent-purple);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15);
}

.search-input {
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: 0.9rem;
    width: 180px;
}

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

.search-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    transition: var(--transition);
}

.search-btn:hover {
    color: var(--accent-purple);
}

.theme-toggle {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 8px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-secondary);
    transition: var(--transition);
}

.theme-toggle:hover {
    color: var(--accent-purple);
    border-color: var(--accent-purple);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.hero {
    position: relative;
    padding: 100px 0 80px;
    text-align: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 30% 20%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 80%, rgba(6, 182, 212, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 20px;
}

.gradient-text {
    background: var(--gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 36px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(139, 92, 246, 0.35);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-primary);
}

.btn-outline:hover {
    border-color: var(--accent-purple);
    background: rgba(139, 92, 246, 0.1);
}

.main {
    padding: 60px 0;
}

.main-grid {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 40px;
    align-items: start;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 28px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.section-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

.post-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
}

.post-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-purple);
    box-shadow: var(--shadow);
}

.post-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.post-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

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

.post-category {
    position: absolute;
    top: 12px;
    left: 12px;
    padding: 6px 12px;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(8px);
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-cyan);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.post-body {
    padding: 20px;
}

.post-title {
    font-size: 1.1rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.post-excerpt {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--accent-purple);
    transition: var(--transition);
}

.read-more:hover {
    color: var(--accent-cyan);
    gap: 10px;
}

.load-more {
    text-align: center;
    margin-top: 40px;
}

.sidebar {
    display: flex;
    flex-direction: column;
    gap: 24px;
    position: sticky;
    top: 96px;
}

.widget {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
}

.widget-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.widget-icon {
    font-size: 1.2rem;
}

.popular-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.popular-item {
    display: flex;
    gap: 14px;
    align-items: flex-start;
}

.popular-num {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--accent-purple);
    min-width: 24px;
}

.popular-item a {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
    transition: var(--transition);
}

.popular-item a:hover {
    color: var(--text-primary);
}

.categories-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.categories-list a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 14px;
    background: var(--bg-elevated);
    border-radius: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: var(--transition);
}

.categories-list a:hover {
    background: rgba(139, 92, 246, 0.1);
    color: var(--text-primary);
}

.cat-count {
    font-size: 0.8rem;
    padding: 2px 8px;
    background: var(--bg-dark);
    border-radius: 4px;
    color: var(--accent-cyan);
}

.author-widget {
    text-align: center;
}

.author-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    margin: 0 auto 16px;
    background: var(--gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    color: white;
}

.author-avatar-img {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    margin: 0 auto 16px;
    object-fit: cover;
    border: 3px solid var(--accent-purple);
}

.author-name {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.author-bio {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
}

.author-social {
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
}

.social-link {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-secondary);
    transition: var(--transition);
    font-size: 1.1rem;
}

.social-link:hover {
    border-color: var(--accent-purple);
    background: rgba(139, 92, 246, 0.1);
    color: var(--accent-purple);
    transform: translateY(-2px);
}

.footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    padding: 32px 0;
    margin-top: 60px;
}

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

.copyright {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.footer-nav {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.footer-nav a {
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: var(--transition);
}

.footer-nav a:hover {
    color: var(--accent-purple);
}

.footer-disclaimer {
    width: 100%;
    font-size: 0.75rem;
    color: var(--text-secondary);
    opacity: 0.7;
    text-align: left;
    margin-top: 8px;
    padding-top: 12px;
    border-top: 1px solid var(--border);
}

.scroll-to-top {
    position: fixed;
    bottom: 80px;
    right: 30px;
    width: 45px;
    height: 45px;
    background: var(--accent-purple);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.4);
    z-index: 999;
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-to-top:hover {
    background: var(--accent-cyan);
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(139, 92, 246, 0.5);
}

.scroll-to-top svg {
    width: 20px;
    height: 20px;
}

@media (max-width: 1024px) {
    .main-grid {
        grid-template-columns: 1fr 280px;
        gap: 32px;
    }
    
    .posts-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .header-inner {
        height: 64px;
    }
    
    .nav {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--bg-dark);
        border-bottom: 1px solid var(--border);
        padding: 20px;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }
    
    .nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-menu {
        flex-direction: column;
        gap: 4px;
    }
    
    .nav-link {
        padding: 14px 18px;
    }
    
    .search-wrapper {
        display: none;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .hero {
        padding: 60px 0 50px;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
    }
    
    .main-grid {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        position: static;
    }
    
    .footer-inner {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-nav {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.25rem;
    }
    
    .widget {
        padding: 20px;
    }
}