/* Complexityrd.site - Editorial Minimal Design System */

:root {
    --bg-color: #ffffff;
    --bg-secondary: #f8f9fa;
    --text-main: #1a1a1a;
    --text-muted: #4a5568;
    --accent-color: #2563eb;
    --border-color: #e2e8f0;
    --card-bg: #ffffff;
    --font-heading: 'Inter', system-ui, -apple-system, sans-serif;
    --font-body: 'Lora', Georgia, serif;
    --font-mono: 'JetBrains Mono', monospace;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1.5rem;
    --spacing-md: 3rem;
    --spacing-lg: 5rem;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
}

[data-theme="dark"] {
    --bg-color: #111111;
    --bg-secondary: #1a1a1a;
    --text-main: #ffffff;
    --text-muted: #a0a0a0;
    --accent-color: #60a5fa;
    --border-color: #333333;
    --card-bg: #111111;
}

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

html {
    scroll-behavior: smooth;
    font-size: 18px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.8;
    transition: background-color 0.3s ease, color 0.3s ease;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    color: var(--text-main);
    letter-spacing: -0.02em;
}

a {
    color: var(--text-main);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: all 0.2s ease;
}

a:hover {
    border-bottom-color: var(--text-main);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    transition: filter 0.3s ease;
}

ul,
ol {
    margin-left: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

li {
    margin-bottom: 0.5rem;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.section {
    padding: var(--spacing-lg) 0;
}

/* Header */
.site-header {
    background: var(--bg-color);
    padding: 2rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid transparent;
    transition: all 0.3s ease;
}

.site-header.scrolled {
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] .site-header.scrolled {
    box-shadow: 0 2px 10px rgba(255, 255, 255, 0.05);
}

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

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.site-logo {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: -0.02em;
    color: var(--text-main);
}

.site-logo:hover {
    opacity: 0.7;
    border-bottom: none;
}

.mobile-menu-toggle {
    display: none;
    background: transparent;
    border: none;
    font-size: 1.5rem;
    color: var(--text-main);
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
}

.nav-menu {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-link {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
}

.nav-link:hover {
    color: var(--text-main);
    border-bottom-color: transparent;
}

.nav-cta {
    background: var(--text-main);
    color: var(--bg-color) !important;
    padding: 0.7rem 1.5rem;
    font-weight: 600;
}

.nav-cta:hover {
    background: transparent;
    color: var(--text-main) !important;
    border: 1px solid var(--text-main);
}

.theme-toggle {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    cursor: pointer;
    padding: 0.5rem 0.75rem;
    font-size: 1rem;
}

.theme-toggle:hover {
    background: var(--bg-secondary);
}

.hero {
    padding: var(--spacing-lg) 0;
}

.hero-title {
    font-size: 4.5rem;
    margin-bottom: var(--spacing-sm);
    line-height: 1;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--text-muted);
    max-width: 600px;
}

/* Blog Post Styling */
.post-header {
    margin-bottom: var(--spacing-lg);
    text-align: center;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.post-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-heading);
    font-size: 0.9rem;
    color: var(--text-muted);
}

.category-badge {
    background: var(--bg-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
}

.post-title {
    font-size: 3rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.post-subtitle {
    font-size: 1.4rem;
    color: var(--text-muted);
    line-height: 1.5;
    margin-bottom: var(--spacing-md);
    font-weight: 400;
}

.featured-image {
    margin: var(--spacing-md) 0;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.featured-image img {
    width: 100%;
    height: auto;
    object-fit: cover;
}

.featured-image figcaption {
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 0.75rem;
    font-style: italic;
}

.post-content {
    max-width: 740px;
    margin: 0 auto;
    font-size: 1.15rem;
}

.post-content p {
    margin-bottom: 1.75rem;
}

.post-content h2 {
    font-size: 2rem;
    margin-top: 3.5rem;
    margin-bottom: 1.25rem;
    letter-spacing: -0.02em;
}

.post-content h3 {
    font-size: 1.5rem;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
}

.post-content ul,
.post-content ol {
    margin-bottom: 1.75rem;
    padding-left: 1.5rem;
}

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

.post-content hr {
    border: 0;
    height: 1px;
    background: var(--border-color);
    margin: 3rem auto;
    width: 30%;
}

.post-content blockquote {
    border-left: 4px solid var(--accent-color);
    padding: 1.5rem 2rem;
    margin: 2.5rem 0;
    background: var(--bg-secondary);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-style: italic;
    font-size: 1.25rem;
    color: var(--text-main);
}

.post-content img {
    border-radius: var(--radius-md);
    margin: 2rem 0;
    box-shadow: var(--shadow-sm);
}

/* CTA Box */
.cta-box {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    color: white;
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    margin: 4rem 0;
    text-align: center;
    box-shadow: var(--shadow-md);
}

.cta-box h3 {
    color: white;
    margin-top: 0;
    font-size: 1.75rem;
    margin-bottom: 1rem;
}

.cta-box p {
    margin-bottom: 2rem;
    color: #cbd5e1;
    font-size: 1.1rem;
}

/* Related Posts */
.related-posts {
    max-width: 1100px;
    margin: var(--spacing-xl) auto 0;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.related-posts h2 {
    text-align: center;
    margin-bottom: var(--spacing-md);
    font-size: 2rem;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
}

.blog-card {
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: transform 0.2s ease;
}

.blog-card:hover {
    transform: translateY(-4px);
}

.blog-card-image {
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: 1.25rem;
    aspect-ratio: 16/9;
}

.blog-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
    filter: grayscale(100%);
}

.blog-card:hover .blog-card-image img {
    transform: scale(1.05);
    filter: grayscale(0%);
}

.blog-meta {
    font-family: var(--font-heading);
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-bottom: 0.75rem;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.blog-title {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
    line-height: 1.3;
}

.blog-title a {
    border-bottom: none;
}

.blog-title a:hover {
    color: var(--text-muted);
}

.blog-excerpt {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.read-more {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 2px;
    align-self: flex-start;
}

.read-more:hover {
    border-bottom-color: var(--text-main);
}

.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: var(--text-main);
    color: var(--bg-color);
    font-family: var(--font-heading);
    font-weight: 600;
    border: 1px solid var(--text-main);
}

.btn:hover {
    background: transparent;
    color: var(--text-main);
}

.btn-sm {
    padding: 0.6rem 1.2rem;
    font-size: 0.8rem;
}

#reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: var(--text-main);
    z-index: 1001;
}

.ad-unit {
    background: var(--bg-secondary);
    padding: var(--spacing-md);
    text-align: center;
    margin: var(--spacing-lg) 0;
}

.ad-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    color: var(--text-muted);
}

.site-footer {
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-lg);
    text-align: center;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

.footer-links a {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    color: var(--text-muted);
    border-bottom: none;
}

.footer-links a:hover {
    color: var(--text-main);
}

.badge-trending {
    display: inline-block;
    background: var(--text-main);
    color: var(--bg-color);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 2px 6px;
    text-transform: uppercase;
}

.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: var(--bg-color);
    min-width: 200px;
    box-shadow: 0px 4px 12px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    border: 1px solid var(--border-color);
    padding: var(--spacing-xs) 0;
    top: 100%;
    left: 0;
}

.dropdown:hover .dropdown-content {
    display: block;
}

.dropdown-content a {
    color: var(--text-main);
    padding: 12px 16px;
    display: block;
    font-size: 0.85rem;
    border-bottom: none;
    font-family: var(--font-heading);
}

.dropdown-content a:hover {
    background-color: var(--bg-secondary);
}

input,
select,
textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--border-color);
    background: var(--bg-color);
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--text-main);
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--text-main);
    outline: none;
}

label {
    font-family: var(--font-heading);
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    display: block;
    text-transform: uppercase;
    color: var(--text-muted);
}

.tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--bg-secondary);
    color: var(--text-muted);
    font-size: 0.8rem;
    font-family: var(--font-mono);
    text-transform: uppercase;
}

.lead {
    font-size: 1.2rem;
    line-height: 1.6;
}

/* Mobile Styles */
@media (max-width: 768px) {
    html {
        font-size: 16px;
    }

    .site-header {
        padding: 1rem 0;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .post-title {
        font-size: 2.2rem;
    }

    .mobile-menu-toggle {
        display: block !important;
    }

    .nav-menu {
        display: none;
        position: fixed;
        top: 0;
        right: 0;
        width: 100%;
        max-width: 320px;
        height: 100vh;
        background: var(--bg-color);
        border-left: 1px solid var(--border-color);
        flex-direction: column;
        padding: 1.5rem;
        gap: 0;
        z-index: 999;
        box-shadow: -4px 0 20px rgba(0, 0, 0, 0.15);
        overflow-y: auto;
    }

    .nav-menu.active {
        display: flex !important;
    }

    .nav-link {
        width: 100%;
        padding: 0.8rem 0;
        border-bottom: 1px solid var(--border-color);
        font-size: 0.95rem;
    }

    .nav-cta {
        width: 100%;
        text-align: center;
        margin-top: 1rem;
    }

    .dropdown {
        width: 100%;
    }

    .dropdown-content {
        position: static;
        display: none;
        box-shadow: none;
        border: none;
        border-left: 2px solid var(--border-color);
        padding-left: var(--spacing-sm);
        margin-top: var(--spacing-xs);
        background: transparent;
    }

    .dropdown.active .dropdown-content {
        display: block;
    }

    .dropdown:hover .dropdown-content {
        display: none;
    }

    .dropdown.active:hover .dropdown-content {
        display: block;
    }

    .theme-toggle {
        width: 100%;
        justify-content: flex-start;
        margin-top: 1rem;
    }

    .footer-links {
        flex-direction: column;
        gap: 0.5rem;
    }

    .section {
        padding: var(--spacing-md) 0;
    }

    .container {
        padding: 0 1rem;
    }
}

@media (min-width: 1200px) {
    .container {
        max-width: 1200px;
    }
}