/**
 * Rák Kutatási Blog - Stílusok
 * Tudományos, modern design
 */

/* === IMPORT FONTOK === */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;600;700&family=Source+Sans+3:wght@300;400;600;700&display=swap');

/* === CSS VÁLTOZÓK === */
:root {
    /* Színek - Tudományos cyan/teal paletta */
    --primary: #0891b2;
    --primary-dark: #0e7490;
    --primary-light: #06b6d4;
    --secondary: #164e63;
    --accent: #22d3ee;
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-light: #64748b;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --border-color: #e2e8f0;
    
    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;
    
    /* Tipográfia */
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Source Sans 3', sans-serif;
    
    /* Méretek */
    --container-width: 1200px;
    --border-radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Árnyékok */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
}

/* === RESET ÉS ALAPOK === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 17px;
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* === TIPOGRÁFIA === */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-primary);
    margin-bottom: 0.75em;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }

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

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

/* === HEADER === */
.site-header {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: 24px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 32px;
}

.logo h1 {
    font-size: 1.75rem;
    margin: 0;
    font-weight: 700;
}

.logo h1 a {
    color: var(--text-primary);
}

.logo h1 a:hover {
    color: var(--primary);
}

.logo .highlight {
    color: var(--primary);
}

.logo .tagline {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-top: 4px;
}

.main-nav {
    display: flex;
    gap: 32px;
}

.nav-link {
    font-weight: 600;
    color: var(--text-secondary);
    position: relative;
    padding: 8px 0;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* === HERO === */
.hero {
    background: linear-gradient(135deg, #0891b2 0%, #164e63 100%);
    color: white;
    padding: 80px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: 0.3;
    animation: heroPattern 60s linear infinite;
}

@keyframes heroPattern {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.hero-title {
    font-size: 3rem;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.hero-subtitle {
    font-size: 1.25rem;
    opacity: 0.95;
    max-width: 700px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

/* === MAIN CONTENT === */
.main-content {
    padding: 60px 0;
    min-height: 60vh;
}

.content-grid {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 60px;
}

/* === SEARCH BAR === */
.search-bar {
    margin-bottom: 32px;
}

.search-form {
    display: flex;
    gap: 12px;
}

.search-input {
    flex: 1;
    padding: 14px 20px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(8, 145, 178, 0.1);
}

.search-btn {
    padding: 14px 32px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.search-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.search-info,
.category-info {
    background: var(--bg-tertiary);
    padding: 16px 20px;
    border-radius: var(--border-radius);
    margin-bottom: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.clear-search,
.clear-filter {
    color: var(--text-light);
    font-size: 0.875rem;
    font-weight: 600;
}

.clear-search:hover,
.clear-filter:hover {
    color: var(--error);
}

/* === POST CARDS === */
.posts-list {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.post-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 32px;
    transition: var(--transition);
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.post-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
    border-color: var(--primary);
}

.post-meta {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
    font-size: 0.875rem;
}

.post-category {
    background: var(--primary);
    color: white;
    padding: 4px 12px;
    border-radius: 6px;
    font-weight: 600;
    transition: var(--transition);
}

.post-category:hover {
    background: var(--primary-dark);
    color: white;
    transform: scale(1.05);
}

.post-date {
    color: var(--text-light);
    display: flex;
    align-items: center;
}

.post-title {
    font-size: 1.75rem;
    margin-bottom: 16px;
}

.post-title a {
    color: var(--text-primary);
}

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

.post-excerpt {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.post-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.read-more {
    font-weight: 600;
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.read-more:hover {
    gap: 12px;
}

.post-views {
    color: var(--text-light);
    font-size: 0.875rem;
}

.no-posts {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-light);
}

/* === PAGINATION === */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    margin-top: 48px;
}

.pagination-btn {
    padding: 12px 24px;
    background: var(--primary);
    color: white;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: var(--transition);
}

.pagination-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.pagination-info {
    color: var(--text-secondary);
    font-weight: 600;
}

/* === SIDEBAR === */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.widget {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: 24px;
    border: 1px solid var(--border-color);
}

.widget-title {
    font-size: 1.25rem;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--primary);
}

.categories-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.categories-list a {
    color: var(--text-secondary);
    padding: 8px 12px;
    border-radius: 8px;
    display: block;
    transition: var(--transition);
}

.categories-list a:hover,
.categories-list a.active {
    background: var(--primary);
    color: white;
    padding-left: 20px;
}

.tags-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.875rem;
    transition: var(--transition);
    border: 1px solid transparent;
}

.tag:hover {
    background: var(--primary);
    color: white;
    transform: scale(1.05);
    border-color: var(--primary);
}

.about-widget p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* === SINGLE POST === */
.single-post {
    padding: 40px 0 60px;
}

.post-header {
    max-width: 800px;
    margin: 0 auto 48px;
}

.breadcrumb {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-bottom: 24px;
}

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

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

.breadcrumb .separator {
    margin: 0 8px;
}

.breadcrumb .current {
    color: var(--text-secondary);
}

.post-category-badge {
    margin-bottom: 20px;
}

.post-category-badge a {
    background: var(--primary);
    color: white;
    padding: 8px 16px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.875rem;
    display: inline-block;
}

.post-main-title {
    font-size: 3rem;
    line-height: 1.2;
    margin-bottom: 24px;
    font-weight: 700;
}

.post-metadata {
    display: flex;
    gap: 24px;
    color: var(--text-light);
    font-size: 0.9375rem;
    padding: 20px 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 24px;
}

.post-metadata span {
    display: flex;
    align-items: center;
    gap: 8px;
}

.post-metadata svg {
    opacity: 0.7;
}

.post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

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

.post-content {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.post-content h1,
.post-content h2,
.post-content h3 {
    color: var(--text-primary);
    margin-top: 2em;
    margin-bottom: 0.75em;
}

.post-content h1 { font-size: 2rem; }
.post-content h2 { font-size: 1.75rem; }
.post-content h3 { font-size: 1.5rem; }

.post-content p {
    margin-bottom: 1.5em;
}

.post-content strong {
    color: var(--text-primary);
    font-weight: 600;
}

.post-content em {
    font-style: italic;
}

.post-content a {
    color: var(--primary);
    text-decoration: underline;
}

.post-content a:hover {
    color: var(--primary-dark);
}

.post-content ul,
.post-content ol {
    margin: 1.5em 0;
    padding-left: 2em;
}

.post-content li {
    margin-bottom: 0.75em;
    padding-left: 0.5em;
}

.post-content blockquote {
    border-left: 4px solid var(--primary);
    padding-left: 24px;
    margin: 2em 0;
    font-style: italic;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    padding: 24px;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

/* === SHARE SECTION === */
.share-section {
    margin-top: 60px;
    padding-top: 40px;
    border-top: 2px solid var(--border-color);
}

.share-section h3 {
    margin-bottom: 20px;
}

.share-buttons {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.share-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    color: white;
}

.share-btn.facebook { background: #1877f2; }
.share-btn.twitter { background: #1da1f2; }
.share-btn.linkedin { background: #0a66c2; }
.share-btn.copy { background: var(--text-secondary); }

.share-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    opacity: 0.9;
}

/* === RELATED POSTS === */
.related-posts {
    margin-top: 60px;
}

.section-title {
    font-size: 2rem;
    margin-bottom: 32px;
    text-align: center;
}

.related-posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.related-post-card {
    background: var(--bg-secondary);
    padding: 24px;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.related-post-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.related-post-title {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.related-post-title a {
    color: var(--text-primary);
}

.related-post-title a:hover {
    color: var(--primary);
}

.related-post-excerpt {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    margin-bottom: 12px;
}

.related-post-date {
    color: var(--text-light);
    font-size: 0.875rem;
}

.back-to-blog {
    margin-top: 48px;
    text-align: center;
}

.back-btn {
    display: inline-block;
    padding: 14px 28px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-radius: var(--border-radius);
    font-weight: 600;
    border: 2px solid var(--border-color);
    transition: var(--transition);
}

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

/* === FOOTER === */
.site-footer {
    background: var(--secondary);
    color: rgba(255, 255, 255, 0.8);
    padding: 48px 0;
    text-align: center;
    margin-top: 80px;
}

.site-footer p {
    margin-bottom: 8px;
}

.footer-note {
    font-size: 0.875rem;
    opacity: 0.7;
}

/* === LOGIN PAGE === */
.login-page {
    background: linear-gradient(135deg, #0891b2 0%, #164e63 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-container {
    width: 100%;
    max-width: 420px;
}

.login-box {
    background: white;
    border-radius: var(--border-radius);
    padding: 48px 40px;
    box-shadow: var(--shadow-xl);
}

.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.login-header h1 {
    font-size: 2rem;
    margin-bottom: 8px;
}

.login-header p {
    color: var(--text-light);
}

.login-form .form-group {
    margin-bottom: 20px;
}

.login-footer {
    text-align: center;
    margin-top: 24px;
}

.login-footer a {
    color: var(--text-light);
    font-size: 0.875rem;
}

/* === ADMIN === */
.admin-page {
    background: var(--bg-secondary);
}

.admin-header {
    background: var(--secondary);
    color: white;
    padding: 20px 0;
    box-shadow: var(--shadow-md);
}

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

.admin-header h1 {
    color: white;
    margin: 0;
}

.admin-nav {
    display: flex;
    gap: 12px;
}

.admin-container {
    padding: 40px 0;
    min-height: calc(100vh - 200px);
}

.admin-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

.admin-actions h2 {
    margin: 0;
}

/* === FORMS === */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(8, 145, 178, 0.1);
}

.form-help {
    display: block;
    margin-top: 6px;
    font-size: 0.875rem;
    color: var(--text-light);
}

/* === BUTTONS === */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--text-secondary);
    color: white;
}

.btn-secondary:hover {
    background: var(--text-primary);
}

.btn-danger {
    background: var(--error);
    color: white;
}

.btn-danger:hover {
    background: #dc2626;
}

.btn-info {
    background: var(--accent);
    color: var(--text-primary);
}

.btn-info:hover {
    background: var(--primary-light);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.875rem;
}

.btn-block {
    display: block;
    width: 100%;
}

/* === TABLES === */
.posts-table-container {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.posts-table {
    width: 100%;
    border-collapse: collapse;
}

.posts-table th,
.posts-table td {
    padding: 16px;
    text-align: left;
}

.posts-table thead {
    background: var(--bg-tertiary);
    font-weight: 600;
}

.posts-table tbody tr {
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.posts-table tbody tr:hover {
    background: var(--bg-secondary);
}

.action-buttons {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.status-badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

.status-published {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

.status-draft {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning);
}

/* === POST EDITOR === */
.post-editor {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 32px;
}

.editor-main {
    background: white;
    padding: 32px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
}

.editor-sidebar {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.editor-section {
    background: white;
    padding: 24px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
}

.editor-section h3 {
    font-size: 1.25rem;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border-color);
}

.markdown-help {
    background: var(--bg-secondary);
    padding: 16px;
    border-radius: 8px;
    font-size: 0.875rem;
    line-height: 1.8;
}

.markdown-help code {
    background: white;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
}

/* === ALERTS === */
.alert {
    padding: 16px 20px;
    border-radius: var(--border-radius);
    margin-bottom: 24px;
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border: 1px solid var(--success);
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error);
    border: 1px solid var(--error);
}

/* === RESPONSIVE === */
@media (max-width: 968px) {
    .content-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .post-editor {
        grid-template-columns: 1fr;
    }
    
    .hero-title {
        font-size: 2.25rem;
    }
    
    .post-main-title {
        font-size: 2.25rem;
    }
}

@media (max-width: 640px) {
    .header-content {
        flex-direction: column;
        gap: 20px;
    }
    
    .main-nav {
        gap: 20px;
    }
    
    .hero {
        padding: 60px 0;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .post-card {
        padding: 24px;
    }
    
    .post-main-title {
        font-size: 1.875rem;
    }
    
    .related-posts-grid {
        grid-template-columns: 1fr;
    }
    
    .post-metadata {
        flex-direction: column;
        gap: 12px;
    }
    
    .share-buttons {
        flex-direction: column;
    }
    
    .share-btn {
        width: 100%;
        justify-content: center;
    }
    
    .posts-table {
        font-size: 0.875rem;
    }
    
    .posts-table th,
    .posts-table td {
        padding: 12px 8px;
    }
}

/* === UTILITIES === */
.text-center { text-align: center; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }