/* Reset a základní styly */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

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

/* Header */
.header {
    background: linear-gradient(135deg, #1E1B4B 0%, #312E81 50%, #4338CA 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 4px 20px rgba(30, 27, 75, 0.3);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo a {
    text-decoration: none;
    color: white;
}

.logo h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.tagline {
    font-size: 0.9rem;
    opacity: 0.9;
}

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

.main-nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s;
}

.main-nav a:hover {
    opacity: 0.8;
}

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

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: white;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #1E1B4B 0%, #312E81 50%, #4338CA 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.hero-content h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero-content p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* Main Content */
.main-content {
    padding: 3rem 0;
}

.section-title {
    font-size: 2rem;
    margin-bottom: 2rem;
    text-align: center;
    color: #333;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(135deg, #1E1B4B 0%, #312E81 50%, #4338CA 100%);
}

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

.article-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

.article-image {
    position: relative;
    overflow: hidden;
    height: 350px;
    margin-bottom: 1.5rem;
}

.article-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    border-radius: 12px;
}

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

.article-content {
    padding: 1.5rem;
}

.article-category a {
    color: #4338CA;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
}

.article-title {
    margin: 0.5rem 0;
    font-size: 1.3rem;
    line-height: 1.4;
}

.article-title a {
    color: #333;
    text-decoration: none;
    transition: color 0.3s;
}

.article-title a:hover {
    color: #4338CA;
}

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

.article-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: #999;
    margin-top: 1rem;
}

/* AdSense Banner */
.adsense-banner {
    margin: 3rem 0;
    text-align: center;
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 10px;
}

/* Categories */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.category-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

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

.category-card a {
    text-decoration: none;
    color: #333;
}

.category-card h3 {
    color: #4338CA;
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
}

.category-card p {
    color: #666;
}

/* Article Full Page */
.article-full {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.breadcrumb {
    margin-bottom: 2rem;
    color: #666;
}

.breadcrumb a {
    color: #4338CA;
    text-decoration: none;
}

.article-header {
    margin-bottom: 2rem;
}

.article-header .article-title {
    font-size: 2.5rem;
    margin: 1rem 0;
    line-height: 1.3;
}

.article-header .article-meta {
    border-top: 1px solid #eee;
    padding-top: 1rem;
    margin-top: 1rem;
}

.article-image {
    margin: 2rem 0;
    border-radius: 10px;
    overflow: hidden;
}

.article-image img {
    width: 100%;
    height: auto;
}

.article-content {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #333;
}

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

.article-content h2, .article-content h3 {
    margin: 2rem 0 1rem 0;
    color: #333;
}

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

.article-tags a {
    display: inline-block;
    background: #f0f0f0;
    color: #666;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    text-decoration: none;
    margin: 0.2rem;
    font-size: 0.9rem;
    transition: background 0.3s;
}

.article-tags a:hover {
    background: #4338CA;
    color: white;
}

/* Related Articles */
.related-articles {
    margin-top: 3rem;
}

/* Footer */
.footer {
    background: #333;
    color: white;
    padding: 3rem 0 1rem 0;
    margin-top: 3rem;
}

.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: #4338CA;
}

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

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

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

.footer-section a:hover {
    color: #4338CA;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #444;
    color: #999;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    .main-nav ul {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero-content h2 {
        font-size: 2rem;
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
    }
    
    .article-header .article-title {
        font-size: 2rem;
    }
    
    .container {
        padding: 0 15px;
    }
}

@media (max-width: 480px) {
    .hero-content h2 {
        font-size: 1.5rem;
    }
    
    .article-header .article-title {
        font-size: 1.5rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
}

/* Loading animation */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.article-card {
    animation: fadeIn 0.6s ease-out;
}

/* Error Page */
.error-page {
    text-align: center;
    padding: 4rem 0;
}

.error-content h1 {
    font-size: 8rem;
    color: #4338CA;
    margin-bottom: 1rem;
    font-weight: 700;
}

.error-content h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: #333;
}

.error-content p {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

/* Buttons */
.btn-primary, .btn-secondary {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, #1E1B4B 0%, #312E81 50%, #4338CA 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(67, 56, 202, 0.4);
}

.btn-secondary {
    background: transparent;
    color: #4338CA;
    border: 2px solid #4338CA;
}

.btn-secondary:hover {
    background: #4338CA;
    color: white;
}

/* No Articles */
.no-articles {
    text-align: center;
    padding: 3rem 0;
}

.no-articles h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: #333;
}

.no-articles p {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 2rem;
}

/* Category Description */
.category-description {
    text-align: center;
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 2rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #4338CA;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #3730A3;
}