/*
Theme Name: DevLearn Optimized
Theme URI: https://devlearn.com
Author: Hafeez Baig
Description: A highly optimized, custom WordPress theme focused on maximum SEO performance, Core Web Vitals, and fast loading speed. Built without page builders for maximum performance.
Version: 1.0.2
Text Domain: devlearn
*/
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Fira+Code&display=swap');

:root {
    --bg-base: #0B0E14;
    --bg-surface: #151A23;
    --bg-surface-hover: #1E2532;
    --text-primary: #F3F4F6;
    --text-secondary: #9CA3AF;
    --text-muted: #6B7280;
    --accent-blue: #3B82F6;
    --accent-purple: #8B5CF6;
    --accent-gradient: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-highlight: rgba(255, 255, 255, 0.15);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-base) !important;
    background: var(--bg-base) !important;
    color: var(--text-primary) !important;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

img {
    max-width: 100%;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

button, input {
    font-family: inherit;
    border: none;
    outline: none;
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navbar */
.navbar {
    border-bottom: 1px solid var(--border-subtle);
    padding: 20px 0;
    background: rgba(11, 14, 20, 0.8);
    backdrop-filter: blur(12px);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    gap: 24px;
    align-items: center;
}

.nav-links ul, .nav-menu {
    list-style: none;
    display: flex;
    gap: 24px;
    align-items: center;
    margin: 0;
    padding: 0;
}

.nav-links a, .nav-menu a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
}

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

/* Hero Section */
.hero-section {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 64px;
    align-items: center;
    padding: 80px 24px;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.hero-content p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 540px;
}

.cta-group {
    display: flex;
    gap: 16px;
    margin-bottom: 32px;
}

.btn-primary {
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    background: var(--accent-blue);
    color: #fff;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-primary:hover {
    background: #2563EB;
}

.btn-secondary {
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--border-highlight);
}

.trust-line {
    font-size: 0.9rem !important;
    color: var(--text-muted) !important;
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 0 !important;
}

.trust-line .dot {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--border-highlight);
}

.icon-sm {
    width: 16px;
    height: 16px;
}

.hero-visual {
    position: relative;
}

.visual-wrapper {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-subtle);
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.4);
    transform: perspective(1000px) rotateY(-5deg) rotateX(5deg);
    transition: var(--transition);
}

.visual-wrapper:hover {
    transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
}

.visual-wrapper::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), transparent);
    pointer-events: none;
}

/* Search Bar Section */
.search-bar-section {
    padding: 40px 0;
    border-bottom: 1px solid var(--border-subtle);
    border-top: 1px solid var(--border-subtle);
}

.header-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
}

.search-wrapper {
    position: relative;
    width: 100%;
    max-width: 480px;
}

.search-wrapper input {
    width: 100%;
    padding: 14px 24px 14px 48px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 100px;
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: var(--transition);
}

.search-wrapper input:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

.search-wrapper svg {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.category-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.filter-btn {
    padding: 8px 16px;
    border-radius: 100px;
    background: var(--bg-surface);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid var(--border-subtle);
    transition: var(--transition);
}

.filter-btn:hover {
    background: var(--bg-surface-hover);
    color: var(--text-primary);
}

.filter-btn.active {
    background: var(--text-primary);
    color: var(--bg-base);
    border-color: var(--text-primary);
}

/* Main Layout Grid */
.layout-grid {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 48px;
    padding: 60px 24px;
    align-items: start;
}

/* Typography & Headers */
.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Featured Post */
.featured-section {
    margin-bottom: 60px;
}

.featured-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    display: grid;
    grid-template-columns: 1fr 1fr;
    transition: var(--transition);
}

.featured-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-highlight);
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}

.featured-img {
    height: 100%;
    min-height: 300px;
    object-fit: cover;
}

.featured-content {
    padding: 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.tag {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-blue);
    width: fit-content;
}

.featured-content h3 {
    font-size: 2rem;
    line-height: 1.3;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.featured-content p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    font-size: 1.1rem;
}

.meta {
    display: flex;
    align-items: center;
    gap: 16px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.meta .dot {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--text-muted);
}

/* Grid Layout for Posts */
.post-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-bottom: 40px;
}

.card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.card:hover {
    transform: translateY(-4px);
    border-color: var(--border-highlight);
    box-shadow: 0 12px 24px rgba(0,0,0,0.2);
}

.card-img-wrapper {
    position: relative;
    padding-top: 56.25%; /* 16:9 Aspect Ratio */
    overflow: hidden;
}

.card-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.card-content {
    padding: 24px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.card-content h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
    line-height: 1.4;
}

.card-content p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 0.95rem;
    flex-grow: 1;
}

.card-content .tag {
    margin-bottom: 12px;
}

/* Inline Lead Capture */
.inline-capture {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: var(--radius-md);
    padding: 40px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.inline-capture::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-gradient);
}

.inline-capture h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
}

.inline-capture p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.inline-form {
    display: flex;
    gap: 12px;
    max-width: 400px;
    margin: 0 auto;
}

.inline-form input {
    flex-grow: 1;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    background: var(--bg-base);
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
}

.inline-form input:focus {
    border-color: var(--accent-purple);
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    margin-top: 48px;
}

.btn-outline {
    padding: 12px 32px;
    border-radius: 100px;
    background: transparent;
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-outline:hover {
    background: var(--bg-surface-hover);
    border-color: var(--border-highlight);
}

/* Sidebar */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.sidebar-widget {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 24px;
}

.sidebar-widget h3 {
    font-size: 1.1rem;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-subtle);
}

.popular-posts {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.popular-post-item {
    display: grid;
    grid-template-columns: 60px 1fr;
    gap: 16px;
    align-items: center;
    transition: var(--transition);
}

.popular-post-item:hover {
    opacity: 0.8;
}

.popular-post-item img {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-sm);
    object-fit: cover;
}

.popular-post-item h4 {
    font-size: 0.95rem;
    line-height: 1.3;
    margin-bottom: 4px;
}

.popular-post-item .date {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.category-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.category-list a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-secondary);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.category-list a:hover {
    background: var(--bg-surface-hover);
    color: var(--text-primary);
}

.category-list .count {
    background: rgba(255,255,255,0.05);
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.8rem;
}

/* Single Post Layout */
.post-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 64px;
    padding: 60px 24px;
    align-items: start;
    max-width: 1100px;
    margin: 0 auto;
}

.post-header {
    margin-bottom: 40px;
}

.post-header .tag {
    margin-bottom: 24px;
}

.post-title {
    font-size: 3.2rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 32px;
    letter-spacing: -1px;
}

.post-meta-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 0;
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
    margin-bottom: 40px;
}

.author-info {
    display: flex;
    align-items: center;
    gap: 16px;
}

.author-info img {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
}

.author-text h4 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 2px;
}

.author-text p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.post-hero-img {
    width: 100%;
    border-radius: var(--radius-lg);
    margin-bottom: 48px;
    border: 1px solid var(--border-subtle);
}

/* Typography for Post Content */
.post-body {
    font-size: 1.15rem;
    color: #cbd5e1;
    line-height: 1.8;
}

.post-body h2 {
    font-size: 2rem;
    margin: 56px 0 24px;
    font-weight: 700;
    color: #fff;
    letter-spacing: -0.5px;
}

.post-body h3 {
    font-size: 1.5rem;
    margin: 40px 0 16px;
    color: #fff;
}

.post-body p {
    margin-bottom: 24px;
}

.post-body ul, .post-body ol {
    margin-bottom: 24px;
    padding-left: 24px;
}

.post-body li {
    margin-bottom: 12px;
}

.post-body pre {
    background: #0d1117;
    padding: 24px;
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin: 32px 0;
    border: 1px solid var(--border-subtle);
}

.post-body code {
    font-family: 'Fira Code', monospace;
    font-size: 0.95rem;
    color: #e2e8f0;
}

.post-body p code, .post-body li code {
    background: rgba(255, 255, 255, 0.1);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.9em;
    color: var(--accent-blue);
}

.post-body blockquote {
    border-left: 4px solid var(--accent-purple);
    padding-left: 24px;
    margin: 40px 0;
    font-style: italic;
    color: var(--text-secondary);
    background: linear-gradient(90deg, rgba(139, 92, 246, 0.05), transparent);
    padding: 24px;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.post-body img {
    border-radius: var(--radius-md);
    margin: 40px 0;
    border: 1px solid var(--border-subtle);
}

/* Article Sidebar */
.article-sidebar {
    position: sticky;
    top: 100px;
}

.toc-widget h3 {
    font-size: 1.1rem;
    margin-bottom: 16px;
    color: #fff;
}

.toc-widget ul {
    list-style: none;
}

.toc-widget li {
    margin-bottom: 12px;
}

.toc-widget a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    transition: var(--transition);
    display: block;
    border-left: 2px solid transparent;
    padding-left: 12px;
}

.toc-widget a:hover, .toc-widget a.active {
    color: var(--accent-blue);
    border-left-color: var(--accent-blue);
}

.share-widget {
    margin-top: 40px;
    padding-top: 32px;
    border-top: 1px solid var(--border-subtle);
}

.share-buttons {
    display: flex;
    gap: 12px;
    margin-top: 16px;
}

.share-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
}

.share-btn:hover {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    color: #fff;
}

/* Footer */
.site-footer {
    border-top: 1px solid var(--border-subtle);
    padding: 80px 0 40px;
    margin-top: 80px;
    background: var(--bg-surface);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 60px;
}

.footer-about p {
    color: var(--text-secondary);
    margin-top: 16px;
    max-width: 300px;
}

.footer-links h4 {
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.footer-links ul, .footer-menu {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin: 0;
    padding: 0;
}

.footer-links a, .footer-menu a {
    color: var(--text-secondary);
    transition: var(--transition);
}

.footer-links a:hover, .footer-menu a:hover {
    color: var(--accent-blue);
}

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid var(--border-subtle);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    background: transparent;
    color: var(--text-primary);
    cursor: pointer;
    padding: 8px;
}

/* Responsive */
@media (max-width: 992px) {
    .hero-section {
        grid-template-columns: 1fr;
        padding: 60px 24px;
        text-align: center;
    }
    .hero-content p {
        margin: 0 auto 32px;
    }
    .cta-group {
        justify-content: center;
    }
    .trust-line {
        justify-content: center;
    }
    .header-controls {
        flex-direction: column;
        align-items: flex-start;
    }
    .layout-grid {
        grid-template-columns: 1fr;
    }
    .post-layout {
        grid-template-columns: 1fr;
    }
    .featured-card {
        grid-template-columns: 1fr;
    }
    .featured-img {
        min-height: 240px;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--bg-surface);
        flex-direction: column;
        padding: 24px;
        border-bottom: 1px solid var(--border-subtle);
        box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links a {
        padding: 12px 0;
        border-bottom: 1px solid var(--border-subtle);
    }
    
    .nav-links a:last-child {
        border-bottom: none;
    }

    .category-filters {
        flex-wrap: nowrap;
        overflow-x: auto;
        padding-bottom: 8px;
        -webkit-overflow-scrolling: touch;
        justify-content: flex-start;
        width: 100%;
    }
    
    .category-filters::-webkit-scrollbar {
        display: none;
    }

    .post-grid {
        grid-template-columns: 1fr;
    }
    .hero-content h1 {
        font-size: 2.5rem;
    }
    .post-title {
        font-size: 2.2rem;
    }
    .inline-form {
        flex-direction: column;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
}