/* Root Variables */
:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #f59e0b;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --border-color: #e5e7eb;
    --hover-color: #eff6ff;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
}

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

/* Header Styles */
.header {
    background-color: var(--bg-primary);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 0;
    gap: 30px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--primary-color);
    font-size: 24px;
    font-weight: 700;
    white-space: nowrap;
}

.logo i {
    font-size: 32px;
}

.logo h1 {
    font-size: 24px;
    font-weight: 700;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

.main-nav a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: color 0.3s;
    white-space: nowrap;
}

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

.header-search {
    display: flex;
    align-items: center;
    gap: 8px;
    background-color: var(--bg-secondary);
    border-radius: 8px;
    padding: 8px 12px;
    flex: 1;
    max-width: 400px;
}

.header-search input {
    border: none;
    background: transparent;
    outline: none;
    flex: 1;
    font-size: 14px;
}

.header-search button {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 16px;
    transition: color 0.3s;
}

.header-search button:hover {
    color: var(--primary-color);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-primary);
    cursor: pointer;
}

/* Main Content */
.main-content {
    padding: 30px 0;
}

.content-wrapper {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 30px;
}

/* Sidebar */
.sidebar {
    background-color: var(--bg-primary);
    border-radius: 12px;
    padding: 20px;
    height: fit-content;
    position: sticky;
    top: 90px;
    box-shadow: var(--shadow-sm);
}

.sidebar-widget {
    margin-bottom: 30px;
}

.sidebar-widget:last-child {
    margin-bottom: 0;
}

.widget-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.category-list {
    list-style: none;
}

.category-list li {
    margin-bottom: 8px;
}

.category-list a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    text-decoration: none;
    color: var(--text-secondary);
    border-radius: 8px;
    transition: all 0.3s;
    font-size: 14px;
}

.category-list a:hover,
.category-list a.active {
    background-color: var(--hover-color);
    color: var(--primary-color);
}

.category-list i {
    width: 20px;
    text-align: center;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    display: inline-block;
    padding: 6px 12px;
    background-color: var(--bg-secondary);
    border-radius: 20px;
    font-size: 12px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s;
}

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

.sort-select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    cursor: pointer;
    outline: none;
}

/* News Container */
.news-container {
    background-color: var(--bg-primary);
    border-radius: 12px;
    padding: 25px;
    box-shadow: var(--shadow-sm);
}

.news-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
}

.news-header h2 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
}

.news-count {
    color: var(--text-secondary);
    font-size: 14px;
}

/* News Grid */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
    margin-bottom: 30px;
}

.news-card {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s;
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.news-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.news-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background-color: var(--bg-secondary);
}

.news-content {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.news-category {
    display: inline-block;
    padding: 4px 12px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
    width: fit-content;
}

.news-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-excerpt {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 15px;
    line-height: 1.6;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: var(--text-secondary);
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

.news-author {
    display: flex;
    align-items: center;
    gap: 6px;
}

.news-date {
    display: flex;
    align-items: center;
    gap: 6px;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 30px;
}

.pagination button {
    padding: 10px 16px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s;
}

.pagination button:hover:not(:disabled) {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.pagination button.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.pagination button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Footer */
.footer {
    background-color: var(--text-primary);
    color: white;
    padding: 50px 0 20px;
    margin-top: 50px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 30px;
}

.footer-section h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 15px;
}

.footer-section p {
    color: #9ca3af;
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 15px;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: #9ca3af;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

.footer-section ul li a:hover {
    color: var(--primary-color);
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-links a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 18px;
    transition: all 0.3s;
}

.social-links a:hover {
    background-color: var(--primary-color);
    transform: translateY(-3px);
}

.newsletter {
    display: flex;
    gap: 8px;
}

.newsletter input {
    flex: 1;
    padding: 10px 15px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: white;
    outline: none;
    font-size: 14px;
}

.newsletter input::placeholder {
    color: #9ca3af;
}

.newsletter button {
    padding: 10px 20px;
    background-color: var(--primary-color);
    border: none;
    border-radius: 8px;
    color: white;
    cursor: pointer;
    transition: background-color 0.3s;
}

.newsletter button:hover {
    background-color: var(--secondary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #9ca3af;
    font-size: 14px;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .content-wrapper {
        grid-template-columns: 250px 1fr;
    }
    
    .news-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
}

@media (max-width: 992px) {
    .main-nav {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .content-wrapper {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        position: static;
        order: 2;
    }
    
    .news-container {
        order: 1;
    }
}

@media (max-width: 768px) {
    .header-content {
        gap: 15px;
    }
    
    .logo h1 {
        font-size: 20px;
    }
    
    .logo i {
        font-size: 28px;
    }
    
    .header-search {
        max-width: 200px;
    }
    
    .news-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 20px;
    }
    
    .news-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 15px;
    }
    
    .main-content {
        padding: 20px 0;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .news-card {
        margin-bottom: 0;
    }
    
    .sidebar {
        padding: 15px;
    }
    
    .news-container {
        padding: 20px 15px;
    }
    
    .pagination {
        flex-wrap: wrap;
        gap: 8px;
    }
    
    .pagination button {
        padding: 8px 12px;
        font-size: 13px;
    }
}