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

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

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

/* Header and Navigation */
.navbar {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-logo a {
    font-size: 1.5rem;
    font-weight: bold;
    text-decoration: none;
    color: #2563eb;
}

.nav-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 150px 0 80px;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: bold;
}

.hero-description {
    font-size: 1.25rem;
    max-width: 800px;
    margin: 0 auto;
    opacity: 0.9;
}

/* Names Section */
.names-section {
    padding: 80px 0;
    background: #f8fafc;
}

.names-section h2 {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 2.5rem;
    color: #1e293b;
}

.alphabet-filter {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 3rem;
}

.filter-btn {
    background: #fff;
    border: 2px solid #e2e8f0;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
}

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

.names-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.name-item {
    background: white;
    padding: 1rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.name-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.15);
}

.name-item h3 {
    color: #2563eb;
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

/* Article Section */
.article-section {
    padding: 80px 0;
    background: white;
}

.article-section h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: #1e293b;
}

.article-section h3 {
    font-size: 1.75rem;
    margin: 2rem 0 1rem;
    color: #334155;
}

.article-section p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    line-height: 1.8;
}

.article-section a {
    color: #2563eb;
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s ease;
}

.article-section a:hover {
    border-bottom-color: #2563eb;
}

blockquote {
    background: #f1f5f9;
    border-left: 4px solid #2563eb;
    padding: 1.5rem;
    margin: 2rem 0;
    font-style: italic;
    border-radius: 0 10px 10px 0;
}

blockquote cite {
    display: block;
    margin-top: 1rem;
    font-weight: bold;
    color: #64748b;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.comparison-table th,
.comparison-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #e2e8f0;
}

.comparison-table th {
    background: #2563eb;
    color: white;
    font-weight: 600;
}

.comparison-table tr:hover {
    background: #f8fafc;
}

.sources {
    background: #f8fafc;
    padding: 2rem;
    border-radius: 10px;
    margin-top: 3rem;
}

.sources h4 {
    margin-bottom: 1rem;
    color: #1e293b;
}

.sources ul {
    list-style: none;
}

.sources li {
    margin-bottom: 0.5rem;
}

.sources a {
    color: #2563eb;
    text-decoration: none;
}

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

/* Related Articles */
.related-articles {
    padding: 80px 0;
    background: #f8fafc;
}

.related-articles h2 {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 2.5rem;
    color: #1e293b;
}

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

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

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.article-card h3 {
    margin-bottom: 1rem;
}

.article-card h3 a {
    color: #2563eb;
    text-decoration: none;
    font-size: 1.25rem;
}

.article-card h3 a:hover {
    text-decoration: underline;
}

.article-card p {
    color: #64748b;
    line-height: 1.6;
}

/* Footer */
footer {
    background: #1e293b;
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: #f1f5f9;
}

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

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

.footer-section a {
    color: #cbd5e1;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #2563eb;
}

.footer-bottom {
    border-top: 1px solid #334155;
    padding-top: 2rem;
    text-align: center;
    color: #94a3b8;
}

/* GDPR Notice */
.gdpr-notice {
    position: fixed;
    bottom: 20px;
    left: 20px;
    background: #1e293b;
    color: white;
    padding: 1rem;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    max-width: 300px;
    z-index: 1000;
    font-size: 0.9rem;
}

.gdpr-notice button {
    background: #2563eb;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    cursor: pointer;
    margin-left: 0.5rem;
    font-size: 0.8rem;
}

.gdpr-notice.hidden {
    display: none;
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: #2563eb;
    color: white;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.5rem;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    transition: all 0.3s ease;
    opacity: 0;
    visibility: hidden;
}

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

.back-to-top:hover {
    background: #1d4ed8;
    transform: translateY(-2px);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0,0,0,0.05);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .hero h1 {
        font-size: 2rem;
    }

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

    .names-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 0.5rem;
    }

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

    .article-section h2,
    .names-section h2,
    .related-articles h2 {
        font-size: 1.75rem;
    }

    .article-section h3 {
        font-size: 1.5rem;
    }

    .gdpr-notice {
        position: relative;
        bottom: auto;
        left: auto;
        margin: 20px;
        max-width: none;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .alphabet-filter {
        gap: 0.25rem;
    }

    .filter-btn {
        padding: 0.25rem 0.5rem;
        font-size: 0.9rem;
    }

    .comparison-table {
        font-size: 0.9rem;
    }

    .comparison-table th,
    .comparison-table td {
        padding: 0.5rem;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .gdpr-notice,
    .back-to-top,
    .alphabet-filter {
        display: none;
    }

    .hero {
        background: none;
        color: #333;
    }

    body {
        font-size: 12pt;
        line-height: 1.4;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    .hero {
        background: #000;
        color: #fff;
    }

    .name-item,
    .article-card {
        border: 2px solid #333;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}