/* 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, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Header and Navigation */
.header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-brand h1 {
    color: #2c3e50;
    font-size: 1.5rem;
    font-weight: 700;
}

.nav-brand i {
    color: #3498db;
    margin-right: 0.5rem;
}

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

.nav-link {
    text-decoration: none;
    color: #666;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: #3498db;
    background-color: #ecf0f1;
}

/* Main Content */
.main {
    min-height: calc(100vh - 120px);
    padding: 2rem 0;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 4rem 2rem;
    text-align: center;
    margin-bottom: 3rem;
}

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

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.hero-description {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-primary {
    background-color: #3498db;
    color: white;
}

.btn-primary:hover {
    background-color: #2980b9;
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: #95a5a6;
    color: white;
}

.btn-secondary:hover {
    background-color: #7f8c8d;
}

.btn-outline {
    background-color: transparent;
    color: #3498db;
    border: 2px solid #3498db;
}

.btn-outline:hover {
    background-color: #3498db;
    color: white;
}

/* Features Section */
.features {
    padding: 3rem 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 3rem;
}

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

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 3rem;
    color: #3498db;
    margin-bottom: 1rem;
}

.feature-card h4 {
    font-size: 1.5rem;
    color: #2c3e50;
    margin-bottom: 1rem;
}

.feature-card p {
    color: #666;
    line-height: 1.6;
}

/* Page Header */
.page-header {
    text-align: center;
    margin-bottom: 3rem;
}

.page-title {
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 1rem;
}

.page-description {
    font-size: 1.2rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

/* Category Navigation */
.category-nav {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.category-filter {
    background: white;
    border: 2px solid #ecf0f1;
    color: #666;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.category-filter:hover {
    border-color: #3498db;
    color: #3498db;
    transform: translateY(-1px);
}

.category-filter.active {
    background: #3498db;
    border-color: #3498db;
    color: white;
}

.category-filter i {
    font-size: 1rem;
}

/* Search Container */
.search-container {
    margin-bottom: 2rem;
    display: flex;
    justify-content: center;
}

.search-box {
    position: relative;
    width: 100%;
    max-width: 500px;
}

.search-box i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: #666;
}

.search-input {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    border: 2px solid #ecf0f1;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.search-input:focus {
    outline: none;
    border-color: #3498db;
}

/* Articles Count */
.articles-count {
    text-align: center;
    margin-bottom: 2rem;
    color: #666;
    font-weight: 500;
}

/* Articles Container */
.articles-container {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 1.5rem;
}

.article-card {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 1.5rem;
    border-left: 4px solid #3498db;
    transition: all 0.3s ease;
    opacity: 1;
}

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

.article-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.article-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.article-date,
.article-category,
.article-read-time {
    font-size: 0.9rem;
    color: #666;
    background: #ecf0f1;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}

.article-category {
    background: #e3f2fd;
    color: #1976d2;
}

.article-category.technology {
    background: #e8f5e8;
    color: #2e7d32;
}

.article-category.lifestyle {
    background: #fce4ec;
    color: #c2185b;
}

.article-category.business {
    background: #fff3e0;
    color: #f57c00;
}

.article-title a {
    color: #2c3e50;
    text-decoration: none;
    font-size: 1.3rem;
    font-weight: 600;
    line-height: 1.4;
}

.article-title a:hover {
    color: #3498db;
}

.article-excerpt {
    color: #666;
    margin: 1rem 0;
    line-height: 1.6;
}

.article-link {
    color: #3498db;
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.3s ease;
}

.article-link:hover {
    color: #2980b9;
}

/* Breadcrumb */
.breadcrumb {
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #666;
}

.breadcrumb a {
    color: #3498db;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.breadcrumb-separator {
    color: #bdc3c7;
}

/* Article Page */
.article {
    background: white;
    border-radius: 12px;
    padding: 3rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    max-width: 800px;
    margin: 0 auto;
}

.article-header {
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid #ecf0f1;
}

.article-title {
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.article-subtitle {
    font-size: 1.3rem;
    color: #666;
    line-height: 1.4;
    font-weight: 400;
}

.article-content {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #444;
}

.article-content .lead {
    font-size: 1.3rem;
    color: #2c3e50;
    font-weight: 500;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.article-content h2 {
    font-size: 1.8rem;
    color: #2c3e50;
    margin: 2.5rem 0 1rem 0;
    line-height: 1.3;
}

.article-content h3 {
    font-size: 1.4rem;
    color: #34495e;
    margin: 2rem 0 0.5rem 0;
    line-height: 1.3;
}

.article-content p {
    margin-bottom: 1.5rem;
}

.article-content ul,
.article-content ol {
    margin: 1rem 0 1.5rem 2rem;
}

.article-content li {
    margin-bottom: 0.5rem;
}

.article-footer {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid #ecf0f1;
}

.article-navigation {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Footer */
.footer {
    background: #2c3e50;
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 3rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }

    .nav-links {
        gap: 1rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .articles-grid {
        grid-template-columns: 1fr;
    }

    .article {
        padding: 2rem 1rem;
    }

    .article-title {
        font-size: 2rem;
    }

    .article-subtitle {
        font-size: 1.1rem;
    }

    .article-navigation {
        flex-direction: column;
    }

    .page-title {
        font-size: 2rem;
    }

    .category-title {
        font-size: 1.5rem;
    }

    .container {
        padding: 0 0.5rem;
    }

    .category-nav {
        gap: 0.5rem;
    }

    .category-filter {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }

    .search-box {
        margin: 0 1rem;
    }
}

/* Load More Button */
.load-more-container {
    text-align: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid #ecf0f1;
}

.load-more-btn {
    display: inline-flex;
}

.load-more-btn.hidden {
    display: none;
}

/* No Results Message */
.no-results {
    text-align: center;
    padding: 3rem 2rem;
    color: #666;
}

.no-results i {
    font-size: 3rem;
    color: #bdc3c7;
    margin-bottom: 1rem;
}

.no-results h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: #2c3e50;
}

.no-results p {
    font-size: 1rem;
    margin-bottom: 0;
}
.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: #1f2937;
    text-decoration: none;
}

.nav-logo i {
    color: #2563eb;
}

@media (max-width: 480px) {
    .hero {
        padding: 2rem 1rem;
    }

    .hero-title {
        font-size: 1.8rem;
    }

    .article-content {
        font-size: 1rem;
    }

    .article-content .lead {
        font-size: 1.1rem;
    }

    .article-content h2 {
        font-size: 1.5rem;
    }

    .article-content h3 {
        font-size: 1.2rem;
    }
}

/* Print Styles */
@media print {
    .header,
    .footer,
    .breadcrumb,
    .article-navigation {
        display: none;
    }

    .article {
        box-shadow: none;
        padding: 0;
    }

    body {
        background: white;
    }
}