/* Base Styles */
:root {
    --primary-color: #004d99;
    --secondary-color: #ffcc00;
    --accent-color: #e63946;
    --text-color: #333;
    --light-text: #666;
    --lighter-text: #999;
    --background-color: #fff;
    --light-bg: #f8f9fa;
    --border-color: #e0e0e0;
    --success-color: #2e7d32;
    --warning-color: #ff9800;
    --error-color: #d32f2f;
    --font-main: 'Roboto', sans-serif;
    --font-heading: 'Playfair Display', serif;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 16px rgba(0,0,0,0.2);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    color: var(--text-color);
    background-color: var(--background-color);
    line-height: 1.6;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.75rem;
}

h4 {
    font-size: 1.5rem;
}

p {
    margin-bottom: 1.5rem;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--accent-color);
}

/* Layout */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header */
.site-header {
    background-color: var(--primary-color);
    color: white;
    padding: 1rem 0;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: white;
}

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

.main-nav .nav-list {
    list-style: none;
    display: flex;
    gap: 1.5rem;
}

.nav-link {
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.5rem 0;
    position: relative;
    color: rgba(255, 255, 255, 0.9);
}

.nav-link.active {
    color: white;
    font-weight: 600;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--secondary-color);
}

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

.search-btn {
    background: none;
    border: none;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.5rem;
    transition: var(--transition);
}

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

.nav-arrows {
    display: flex;
    gap: 0.75rem;
}

.arrow-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--secondary-color);
    color: var(--primary-color);
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    font-size: 1rem;
    font-weight: 700;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.arrow-link:hover {
    background-color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Skip Link */
.skip-link {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--primary-color);
    color: white;
    padding: 0.75rem 1.5rem;
    z-index: 9999;
    transition: top 0.3s;
}

.skip-link:focus {
    top: 0;
}

/* Breadcrumb */
.breadcrumb {
    padding: 1rem 0;
    margin-bottom: 1rem;
}

.breadcrumb ol {
    display: flex;
    list-style: none;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.breadcrumb li:not(:last-child)::after {
    content: '/';
    margin-left: 0.5rem;
    color: var(--light-text);
}

.breadcrumb a {
    color: var(--light-text);
}

.breadcrumb a:hover {
    color: var(--primary-color);
}

.breadcrumb [aria-current="page"] {
    color: var(--primary-color);
    font-weight: 500;
}

/* Blog Hero */
.blog-hero {
    background-color: var(--primary-color);
    color: white;
    padding: 4rem 0;
    margin-bottom: 3rem;
    background-image: linear-gradient(rgba(0, 77, 153, 0.9), rgba(0, 77, 153, 0.9)), url('../assets/images/medical-background.webP');
    background-size: cover;
    background-position: center;
    text-align: center;
}

.blog-hero h1 {
    color: white;
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    max-width: 700px;
    margin: 0 auto 2rem;
    opacity: 0.9;
}

.hero-search {
    max-width: 600px;
    margin: 0 auto;
}

.hero-search form {
    position: relative;
}

.hero-search input {
    width: 100%;
    padding: 1rem 1.5rem;
    border-radius: 50px;
    border: none;
    font-family: var(--font-main);
    font-size: 1rem;
    box-shadow: var(--shadow-md);
}

.hero-search button {
    position: absolute;
    right: 5px;
    top: 5px;
    bottom: 5px;
    background-color: var(--secondary-color);
    color: var(--primary-color);
    border: none;
    border-radius: 50px;
    width: 50px;
    cursor: pointer;
    transition: var(--transition);
}

.hero-search button:hover {
    background-color: white;
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-label {
    display: inline-block;
    background-color: var(--secondary-color);
    color: var(--primary-color);
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    font-weight: 600;
    margin-bottom: 1rem;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
}

.section-description {
    max-width: 700px;
    margin: 0 auto;
    color: var(--light-text);
}

/* Featured Section */
.featured-section {
    padding: 3rem 0;
}

.featured-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 2rem;
    margin-bottom: 3rem;
}

.featured-card {
    background-color: white;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.featured-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

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

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

.featured-large .card-image {
    height: 440px;
}

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

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

.card-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background-color: var(--accent-color);
    color: white;
    padding: 0.25rem 1rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
}

.card-content {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.card-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    font-size: 0.85rem;
    color: var(--light-text);
    flex-wrap: wrap;
}

.meta-category {
    font-weight: 600;
    color: var(--primary-color);
}

.card-excerpt {
    margin-bottom: 1.5rem;
    flex: 1;
}

.card-footer {
    margin-top: auto;
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--primary-color);
    transition: var(--transition);
}

.card-link:hover {
    color: var(--accent-color);
    gap: 0.75rem;
}

/* Category Filter */
.category-filter {
    background-color: var(--light-bg);
    padding: 2rem 0;
    margin-bottom: 3rem;
}

.filter-container {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.filter-container h3 {
    margin-bottom: 0;
    font-size: 1.25rem;
}

.filter-buttons {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.filter-btn {
    background-color: white;
    border: 1px solid var(--border-color);
    color: var(--light-text);
    padding: 0.5rem 1.25rem;
    border-radius: 50px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn.active, .filter-btn:hover {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Articles Section */
.articles-section {
    padding: 3rem 0;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.article-card {
    background-color: white;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

/* Newsletter Section */
.newsletter-section {
    background-color: var(--primary-color);
    color: white;
    padding: 4rem 0;
    margin: 4rem 0;
}

.newsletter-container {
    display: flex;
    flex-wrap: wrap;
    gap: 3rem;
    align-items: center;
}

.newsletter-content {
    flex: 1;
    min-width: 300px;
}

.newsletter-content h2 {
    color: white;
    margin-bottom: 1.5rem;
}

.newsletter-content p {
    opacity: 0.9;
    margin-bottom: 1.5rem;
    max-width: 500px;
}

.newsletter-benefits ul {
    list-style: none;
}

.newsletter-benefits li {
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.newsletter-form {
    flex: 1;
    min-width: 300px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

.form-group {
    width: 100%;
}

.newsletter-form input, 
.newsletter-form select {
    width: 100%;
    padding: 1rem;
    border-radius: var(--radius-sm);
    border: none;
    font-family: inherit;
}

.subscribe-btn {
    background-color: var(--secondary-color);
    color: var(--primary-color);
    border: none;
    padding: 1rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.subscribe-btn:hover {
    background-color: white;
}

.privacy-notice {
    font-size: 0.85rem;
    opacity: 0.8;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 3rem;
}

.pagination-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background-color: white;
    color: var(--light-text);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

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

.next-btn {
    width: auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Footer */
.site-footer {
    background-color: #f5f5f5;
    padding: 4rem 0 2rem;
    color: var(--light-text);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-about {
    max-width: 300px;
}

.footer-about h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.footer-about p {
    margin-bottom: 1.5rem;
}

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

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: white;
    color: var(--primary-color);
    border-radius: 50%;
    transition: var(--transition);
}

.social-links a:hover {
    background-color: var(--primary-color);
    color: white;
}

.footer-links h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.25rem;
}

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

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: var(--light-text);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-color);
    padding-left: 0.25rem;
}

.footer-contact h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.25rem;
}

.footer-contact p {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.footer-bottom {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.9rem;
}

.legal-links {
    display: flex;
    gap: 1.5rem;
}

.legal-links a {
    color: var(--light-text);
}

.legal-links a:hover {
    color: var(--primary-color);
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 99;
    box-shadow: var(--shadow-md);
}

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

.back-to-top:hover {
    background-color: var(--accent-color);
    transform: translateY(-3px);
}

/* Responsive Styles */
@media (max-width: 992px) {
    .featured-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .featured-large {
        grid-column: span 2;
        grid-row: span 1;
    }
    
    .featured-large .card-image {
        height: 300px;
    }
}

@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }
    
    .main-nav {
        order: 3;
    }
    
    .main-nav .nav-list {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .header-actions {
        justify-content: center;
    }
    
    .blog-hero h1 {
        font-size: 2.25rem;
    }
    
    .featured-grid {
        grid-template-columns: 1fr;
    }
    
    .featured-large {
        grid-column: span 1;
    }
    
    .filter-container {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 576px) {
    .blog-hero h1 {
        font-size: 2rem;
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
    }
    
    .newsletter-container {
        flex-direction: column;
    }
    
    .newsletter-form {
        width: 100%;
    }
}