/* DSLLM Blog - Main Stylesheet */
/* Philosophy: "Do nothing. Deploy everything." - Styles emerge naturally */

:root {
    /* Colors */
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --text-dark: #2d3748;
    --text-medium: #4a5568;
    --text-light: #718096;
    --bg-white: #ffffff;
    --bg-gray-50: #f9fafb;
    --bg-gray-100: #f7fafc;
    --border-color: #e2e8f0;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    
    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    
    /* Border Radius */
    --border-radius-sm: 0.25rem;
    --border-radius: 0.375rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-gray-50);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Accessibility - Screen Reader Only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Skip Link for Accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-2) var(--spacing-4);
    text-decoration: none;
    border-radius: var(--border-radius);
    z-index: 1000;
    transition: top var(--transition-normal);
}

.skip-link:focus {
    top: 6px;
}

/* Header Styles */
.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: var(--spacing-4) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-md);
}
.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

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

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-color);
}

.nav-cta {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.language-switch {
    display: flex;
    gap: 0.25rem;
    background: var(--border-color);
    border-radius: 6px;
    padding: 2px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: var(--gradient-selft);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 0.7rem;
}

.logo:hover {
    opacity: 0.9;
}



.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: var(--font-size-xl);
    cursor: pointer;
    padding: var(--spacing-2);
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background: white;
    position: relative;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background: white;
    transition: all var(--transition-normal);
}

.hamburger::before {
    top: -8px;
}

.hamburger::after {
    top: 8px;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: var(--spacing-16) 0;
    text-align: center;
}

.hero-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-8);
}

.hero h1 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-4);
    line-height: 1.2;
}

.hero p {
    font-size: var(--font-size-xl);
    opacity: 0.9;
    line-height: 1.6;
    margin-bottom: var(--spacing-8);
}

.hero-actions {
    display: flex;
    gap: var(--spacing-4);
    justify-content: center;
    flex-wrap: wrap;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-4) var(--spacing-6);
    border-radius: var(--border-radius-lg);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-normal);
}

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

.cta-button.primary:hover {
    background: var(--bg-gray-100);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.cta-button.secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.cta-button.secondary:hover {
    background: white;
    color: var(--primary-color);
}

/* Main Content Layout */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-12) var(--spacing-8);
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-12);
}

/* Section Titles */
.section-title {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    margin-bottom: var(--spacing-8);
    color: var(--text-dark);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--border-radius);
}

/* Blog Posts */
.blog-posts {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-8);
}

.blog-post {
    background: var(--bg-white);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-8);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.blog-post:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.blog-post.featured {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    border: 2px solid var(--primary-color);
    position: relative;
}

.blog-post.featured::before {
    content: 'Featured';
    position: absolute;
    top: -1px;
    right: var(--spacing-6);
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-1) var(--spacing-3);
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: 0 0 var(--border-radius) var(--border-radius);
}

.post-category {
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--border-radius-lg);
    font-weight: 500;
    text-decoration: none;
    font-size: var(--font-size-xs);
    transition: background-color var(--transition-normal);
}

.post-category:hover {
    background: var(--secondary-color);
}

.read-time,
.author {
    display: flex;
    align-items: center;
    gap: var(--spacing-1);
}

.post-title {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    margin-bottom: var(--spacing-4);
    line-height: 1.3;
}

.post-title a {
    color: var(--text-dark);
    text-decoration: none;
    transition: color var(--transition-normal);
}

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

.post-excerpt {
    color: var(--text-medium);
    margin-bottom: var(--spacing-6);
    line-height: 1.7;
    font-size: var(--font-size-base);
}

.read-more {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    transition: all var(--transition-normal);
}

.read-more:hover {
    gap: var(--spacing-3);
    color: var(--secondary-color);
}

/* Sidebar Styles */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-8);
}

.sidebar-widget {
    background: var(--bg-white);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-6);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.widget-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-4);
    color: var(--text-dark);
}

/* Search Form */
.search-form {
    display: flex;
    gap: var(--spacing-2);
    position: relative;
}

.search-input {
    flex: 1;
    padding: var(--spacing-3);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-sm);
    transition: border-color var(--transition-normal);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.search-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: var(--spacing-3);
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: background-color var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

/* Category List */
.category-list {
    list-style: none;
}

.category-list li {
    margin-bottom: var(--spacing-2);
}

.category-list a {
    color: var(--text-medium);
    text-decoration: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-2) 0;
    transition: color var(--transition-normal);
    border-bottom: 1px solid transparent;
}

.category-list a:hover {
    color: var(--primary-color);
    border-bottom-color: var(--border-color);
}

.post-count {
    background: var(--bg-gray-100);
    color: var(--text-light);
    padding: var(--spacing-1) var(--spacing-2);
    border-radius: var(--border-radius-lg);
    font-size: var(--font-size-xs);
    font-weight: 500;
}

/* Recent Posts */
.recent-posts {
    list-style: none;
}

.recent-posts li {
    margin-bottom: var(--spacing-4);
    padding-bottom: var(--spacing-4);
    border-bottom: 1px solid var(--border-color);
}

.recent-posts li:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.recent-posts a {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    line-height: 1.4;
    transition: color var(--transition-normal);
    display: block;
    margin-bottom: var(--spacing-1);
}

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

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

/* Newsletter Form */
.newsletter-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
}

.newsletter-input {
    padding: var(--spacing-3);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-sm);
    transition: border-color var(--transition-normal);
}

.newsletter-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.newsletter-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: var(--spacing-3);
    border-radius: var(--border-radius-md);
    cursor: pointer;
    font-weight: 500;
    transition: background-color var(--transition-normal);
}

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

.newsletter-help {
    font-size: var(--font-size-xs);
    color: var(--text-light);
    text-align: center;
}

.social-links {
    display: flex;
    gap: var(--spacing-4);
    margin-top: var(--spacing-4);
}

.social-links a {
    color: #a0aec0;
    text-decoration: none;
    transition: color var(--transition-normal);
}

.social-links a:hover {
    color: white;
}

/* Footer */
.footer {
    background: var(--text-dark);
    color: white;
    padding: var(--spacing-12) 0 var(--spacing-4);
    margin-top: var(--spacing-16);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-8);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-8);
    margin-bottom: var(--spacing-8);
}

.footer-section h3 {
    margin-bottom: var(--spacing-4);
    color: white;
    font-size: var(--font-size-lg);
}

.footer-section p {
    color: #a0aec0;
    line-height: 1.6;
    margin-bottom: var(--spacing-4);
}

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

.footer-links li {
    margin-bottom: var(--spacing-2);
}

.footer-links a {
    color: #a0aec0;
    text-decoration: none;
    transition: color var(--transition-normal);
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-8);
    border-top: 1px solid #4a5568;
    color: #a0aec0;
}

.footer-bottom p {
    margin-bottom: var(--spacing-2);
}

.footer-bottom p:last-child {
    margin-bottom: 0;
    font-style: italic;
    opacity: 0.8;
}

/* Focus States for Accessibility */
*:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Smooth Animations */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* Print Styles */
@media print {
    .header,
    .sidebar,
    .footer,
    .cta-button {
        display: none;
    }
    
    .main-content {
        grid-template-columns: 1fr;
        max-width: none;
        margin: 0;
        padding: 0;
    }
    
    .blog-post {
        box-shadow: none;
        border: 1px solid #ccc;
        page-break-inside: avoid;
        margin-bottom: var(--spacing-4);
    }
}