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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
.header {
    background: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav {
    padding: 1rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand .brand-link {
    font-size: 1.5rem;
    font-weight: 700;
    color: #2563eb;
    text-decoration: none;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

/* Mobile menu toggle */
.nav-toggle {
    display: block !important;
    background: none;
    border: none;
    padding: 0.5rem;
    cursor: pointer;
    color: #6b7280;
    transition: color 0.3s ease;
    z-index: 51;
    position: relative;
}

.nav-toggle:hover {
    color: #2563eb;
}

.nav-toggle svg {
    width: 24px;
    height: 24px;
    fill: currentColor;
}

.nav-toggle.active .hamburger-line {
    background: #2563eb;
}

.hamburger-line {
    display: block;
    width: 24px;
    height: 2px;
    background: currentColor;
    margin: 5px 0;
    transition: all 0.3s ease;
    transform-origin: center;
}

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

.nav-toggle.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

.nav-link {
    color: #6b7280;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: #2563eb;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.search-btn {
    background: none;
    border: none;
    padding: 0.5rem;
    cursor: pointer;
    color: #6b7280;
    transition: color 0.3s ease;
}

.search-btn:hover {
    color: #2563eb;
}

.icon {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 0.375rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.875rem;
}

.btn-primary {
    background: #2563eb;
    color: white;
}

.btn-primary:hover {
    background: #1d4ed8;
}

.btn-outline {
    background: transparent;
    color: #2563eb;
    border: 1px solid #2563eb;
}

.btn-outline:hover {
    background: #2563eb;
    color: white;
}

.btn-large {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 6rem 0;
    text-align: center;
}

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

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Section Styles */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    color: #1f2937;
}

.section-link {
    color: #2563eb;
    text-decoration: none;
    font-weight: 500;
}

.section-link:hover {
    text-decoration: underline;
}

/* Featured Section */
.featured {
    padding: 4rem 0;
    background: #f9fafb;
}

.featured-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.featured-card {
    background: white;
    border-radius: 0.5rem;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.featured-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.featured-card--large {
    grid-row: span 2;
}

.featured-card__image {
    position: relative;
    height: 200px;
}

.featured-card--large .featured-card__image {
    height: 400px;
}

.featured-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.featured-card__category {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: #2563eb;
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 500;
}

.featured-card__content {
    padding: 1.5rem;
}

.article-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.875rem;
    color: #6b7280;
    margin-bottom: 0.75rem;
}

.article-author {
    font-weight: 500;
}

.article-date {
    color: #9ca3af;
}

.article-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: #1f2937;
    line-height: 1.4;
}

.featured-card--large .article-title {
    font-size: 1.5rem;
}

.article-excerpt {
    color: #6b7280;
    margin-bottom: 1rem;
    line-height: 1.5;
}

.article-link {
    color: #2563eb;
    text-decoration: none;
    font-weight: 500;
}

.article-link:hover {
    text-decoration: underline;
}

/* Latest Posts Section */
.latest {
    padding: 4rem 0;
}

.section-filters {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.5rem 1rem;
    border: 1px solid #e5e7eb;
    background: white;
    color: #6b7280;
    border-radius: 0.375rem;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.875rem;
}

.filter-btn:hover,
.filter-btn.active {
    background: #2563eb;
    color: white;
    border-color: #2563eb;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.article-card {
    background: white;
    border-radius: 0.5rem;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.article-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.article-card__image {
    height: 200px;
}

.article-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.article-card__content {
    padding: 1.5rem;
}

.article-category {
    background: #e5e7eb;
    color: #374151;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 500;
}

.article-author {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 1rem;
}

.author-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.author-name {
    font-size: 0.875rem;
    color: #6b7280;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
}

.pagination-btn {
    padding: 0.5rem 0.75rem;
    border: 1px solid #e5e7eb;
    background: white;
    color: #6b7280;
    border-radius: 0.375rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.pagination-btn:hover:not(:disabled),
.pagination-btn.active {
    background: #2563eb;
    color: white;
    border-color: #2563eb;
}

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

/* Categories Section */
.categories {
    padding: 4rem 0;
    background: #f9fafb;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.category-card {
    background: white;
    padding: 2rem 1.5rem;
    border-radius: 0.5rem;
    text-align: center;
    text-decoration: none;
    color: inherit;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.category-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.category-card__icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 1rem;
    color: #2563eb;
}

.category-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #1f2937;
}

.category-count {
    color: #6b7280;
    font-size: 0.875rem;
}

/* Newsletter Section */
.newsletter {
    padding: 4rem 0;
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    color: white;
    text-align: center;
}

.newsletter-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.newsletter-subtitle {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.newsletter-form {
    display: flex;
    gap: 1rem;
    max-width: 500px;
    margin: 0 auto;
    flex-wrap: wrap;
}

.newsletter-input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 0.375rem;
    background: rgba(255,255,255,0.1);
    color: white;
    font-size: 1rem;
    min-width: 250px;
}

.newsletter-input::placeholder {
    color: rgba(255,255,255,0.7);
}

.newsletter-input:focus {
    outline: none;
    border-color: white;
    background: rgba(255,255,255,0.2);
}

/* Footer */
.footer {
    background: #1f2937;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: white;
}

.footer-description {
    color: #9ca3af;
    margin-bottom: 1.5rem;
    line-height: 1.5;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    color: white;
    text-decoration: none;
    transition: background 0.3s ease;
}

.social-link:hover {
    background: #2563eb;
}

.footer-heading {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: white;
}

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

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: #9ca3af;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 1rem;
    text-align: center;
    color: #9ca3af;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }
    
    .nav-container {
        position: relative;
    }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        gap: 0;
        padding: 0;
        margin: 0;
        border-top: 1px solid #e5e7eb;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        z-index: 50;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }
    
    .nav-menu.active {
        display: flex;
        max-height: 400px;
    }
    
    .nav-menu li {
        width: 100%;
    }
    
    .nav-link {
        display: block;
        padding: 1rem 20px;
        border-bottom: 1px solid #f3f4f6;
        transition: background-color 0.3s ease;
        color: #374151;
        font-weight: 500;
    }
    
    .nav-link:hover {
        background-color: #f9fafb;
        color: #2563eb;
    }
    
    .nav-actions {
        display: flex;
        align-items: center;
        gap: 1rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .featured-grid {
        grid-template-columns: 1fr;
    }
    
    .featured-card--large .featured-card__image {
        height: 250px;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
    }
    
    .categories-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
    
    .newsletter-input {
        min-width: 100%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .nav-container {
        padding: 0 15px;
    }
    
    .nav-link {
        padding: 0.75rem 15px;
    }
    
    .hero {
        padding: 4rem 0;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .featured,
    .latest,
    .categories {
        padding: 2rem 0;
    }
}