/* 
 * lucasbarnes.cc - Premium Modern Styles
 * Design System: Minimalist, Typography-driven, High Contrast
 */

 @import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

 :root {
     /* 
      * Color Palette - HSL for programmatic control 
      */
     
     /* Light Mode Base */
     --hue-primary: 30; /* Warm/Paper tone */
     --hue-accent: 210; /* Soft Blue */
 
     --color-bg-base: hsl(36, 33%, 97%);      /* #faf8f5 - Warm, paper-like off-white */
     --color-bg-surface: hsl(0, 0%, 100%);    /* #ffffff */
     --color-bg-subtle: hsl(36, 20%, 94%);
 
     --color-text-primary: hsl(0, 0%, 10%);   /* Almost black for contrast */
     --color-text-secondary: hsl(0, 0%, 40%); /* Soft grey */
     --color-text-tertiary: hsl(0, 0%, 60%);
 
     --color-accent: hsl(210, 80%, 50%);      /* Modern blue link color */
     --color-accent-hover: hsl(210, 80%, 40%);
     
     --color-border: hsl(36, 15%, 88%);
     --color-border-hover: hsl(36, 15%, 75%);
 
     /* Functional */
     --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
     --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
     --shadow-md: 0 12px 24px -6px rgba(0, 0, 0, 0.05), 0 8px 12px -6px rgba(0, 0, 0, 0.03);
     
     --radius-sm: 6px;
     --radius-md: 12px;
     --radius-lg: 20px;
 
     --font-ui: 'Inter', system-ui, -apple-system, sans-serif;
     --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
 
     --transition-base: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
     --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
 
     /* Spacing */
     --spacing-container: 740px; /* Optimal reading width */
 }
 
 [data-theme="dark"] {
     /* Dark Mode Base - Obsidian/Night */
     --color-bg-base: hsl(240, 5%, 8%);      /* Deep charcoal */
     --color-bg-surface: hsl(240, 5%, 12%);  /* Slightly lighter surface */
     --color-bg-subtle: hsl(240, 5%, 16%);
 
     --color-text-primary: hsl(0, 0%, 95%);
     --color-text-secondary: hsl(240, 4%, 70%);
     --color-text-tertiary: hsl(240, 4%, 50%);
 
     --color-border: hsl(240, 5%, 20%);
     --color-border-hover: hsl(240, 5%, 35%);
 
     --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.5);
     --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
     --shadow-md: 0 12px 24px -12px rgba(0, 0, 0, 0.5);
 }
 
 /* Reset */
 *, *::before, *::after {
     margin: 0;
     padding: 0;
     box-sizing: border-box;
 }
 
 body {
     background-color: var(--color-bg-base);
     color: var(--color-text-primary);
     font-family: var(--font-ui);
     line-height: 1.65;
     font-size: 16px;
     -webkit-font-smoothing: antialiased;
     -moz-osx-font-smoothing: grayscale;
     transition: background-color var(--transition-smooth), color var(--transition-smooth);
     min-height: 100vh;
     display: flex;
     flex-direction: column;
 }
 
 /* Layout */
 .site-header {
     background: rgba(255, 255, 255, 0.8);
     backdrop-filter: blur(12px);
     -webkit-backdrop-filter: blur(12px);
     border-bottom: 1px solid var(--color-border);
     position: sticky;
     top: 0;
     z-index: 100;
     padding: 1.5rem 0;
     transition: background-color var(--transition-smooth), border-color var(--transition-smooth);
 }
 
 [data-theme="dark"] .site-header {
     background: rgba(20, 20, 23, 0.8);
 }
 
 .header-content {
     max-width: var(--spacing-container);
     margin: 0 auto;
     padding: 0 1.5rem;
     display: flex;
     flex-direction: column;
     gap: 1.5rem;
 }
 
 .header-top {
     display: flex;
     justify-content: space-between;
     align-items: center;
 }
 
 .site-title {
     font-size: 1.25rem;
     font-weight: 700;
     color: var(--color-text-primary);
     letter-spacing: -0.02em;
     text-decoration: none; /* Make it look like a logo */
     cursor: pointer;
 }
 
 .header-controls {
     display: flex;
     align-items: center;
     gap: 1rem;
 }
 
 /* Theme Toggle - Minimalist Switch */
 .theme-toggle-wrapper {
     display: flex;
     align-items: center;
 }
 
 .theme-toggle {
     width: 44px;
     height: 24px;
     background: var(--color-bg-subtle);
     border: 1px solid var(--color-border);
     border-radius: 99px;
     position: relative;
     cursor: pointer;
     transition: all var(--transition-base);
 }
 
 .theme-toggle:hover {
     border-color: var(--color-text-tertiary);
 }
 
 .theme-toggle input {
     display: none;
 }
 
 .slider {
     position: absolute;
     top: 2px;
     left: 2px;
     width: 18px;
     height: 18px;
     background: var(--color-text-secondary);
     border-radius: 50%;
     transition: transform var(--transition-base);
 }
 
 .theme-toggle input:checked + .slider {
     transform: translateX(20px);
     background: var(--color-text-primary);
 }
 
 /* Search Bar */
 .search-container {
     width: 100%;
 }
 
 .search-input {
     width: 100%;
     padding: 0.8rem 1rem;
     background: var(--color-bg-surface);
     border: 1px solid var(--color-border);
     border-radius: var(--radius-md);
     font-family: var(--font-ui);
     font-size: 0.95rem;
     color: var(--color-text-primary);
     transition: all var(--transition-base);
     box-shadow: var(--shadow-xs);
 }
 
 .search-input:focus {
     outline: none;
     border-color: var(--color-accent);
     box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
 }
 
 .search-input::placeholder {
     color: var(--color-text-tertiary);
 }
 
 /* Tag Cloud */
 .tag-cloud {
     display: flex;
     flex-wrap: wrap;
     gap: 0.5rem;
 }
 
 .tag {
     font-size: 0.8rem;
     font-weight: 500;
     padding: 0.4rem 0.8rem;
     background: var(--color-bg-surface);
     border: 1px solid var(--color-border);
     border-radius: 99px;
     color: var(--color-text-secondary);
     cursor: pointer;
     transition: all var(--transition-base);
     user-select: none;
 }
 
 .tag:hover {
     border-color: var(--color-text-primary);
     color: var(--color-text-primary);
     transform: translateY(-1px);
 }
 
 .tag.active {
     background: var(--color-text-primary);
     color: var(--color-bg-base); /* Invert text for active state */
     border-color: var(--color-text-primary);
 }
 
 /* Main Content */
 .posts-container, .single-post-view {
     max-width: var(--spacing-container);
     margin: 0 auto;
     padding: 3rem 1.5rem;
     width: 100%;
     flex: 1; /* Push footer down */
 }
 
 /* Post List Item */
 .post {
     margin-bottom: 3rem;
     padding-bottom: 3rem;
     border-bottom: 1px solid var(--color-border);
     animation: fadeIn 0.5s ease forwards;
 }
 
 .post:last-child {
     border-bottom: none;
 }
 
 .post-title {
     font-size: 1.75rem;
     font-weight: 700;
     margin-bottom: 0.75rem;
     line-height: 1.3;
 }
 
 .post-title-link {
     color: var(--color-text-primary);
     text-decoration: none;
     background-image: linear-gradient(var(--color-text-primary), var(--color-text-primary));
     background-size: 0% 2px;
     background-repeat: no-repeat;
     background-position: left bottom;
     transition: background-size 0.3s ease;
 }
 
 .post-title-link:hover {
     background-size: 100% 2px;
 }
 
 .post-meta {
     display: flex;
     align-items: center;
     gap: 1rem;
     margin-bottom: 1rem;
     font-size: 0.9rem;
     color: var(--color-text-tertiary);
     font-family: var(--font-mono);
 }
 
 .post-tags {
     display: flex;
     gap: 0.5rem;
     margin-bottom: 1rem;
 }
 
 .post-tag {
     font-size: 0.75rem;
     color: var(--color-accent);
     font-weight: 500;
     text-transform: uppercase;
     letter-spacing: 0.05em;
 }
 
 .post-teaser {
     color: var(--color-text-secondary);
     font-size: 1.05rem;
     margin-bottom: 1.5rem;
     line-height: 1.7;
 }
 
 .read-more {
     display: inline-flex;
     align-items: center;
     font-weight: 600;
     color: var(--color-text-primary);
     text-decoration: none;
     font-size: 0.95rem;
     transition: transform var(--transition-base);
 }
 
 .read-more:hover {
     transform: translateX(4px);
     color: var(--color-accent);
 }
 
 /* Single Post View */
 .back-button {
     background: none;
     border: none;
     color: var(--color-text-secondary);
     font-family: var(--font-ui);
     font-weight: 500;
     font-size: 0.95rem;
     cursor: pointer;
     display: inline-flex;
     align-items: center;
     gap: 0.5rem;
     padding: 0.5rem 0;
     margin-bottom: 2rem;
     transition: color var(--transition-base);
 }
 
 .back-button:hover {
     color: var(--color-text-primary);
 }
 
 .single-post-title {
     font-size: 2.5rem;
     font-weight: 800;
     letter-spacing: -0.03em;
     line-height: 1.2;
     margin-bottom: 1.5rem;
     color: var(--color-text-primary);
 }
 
 .post-featured-image {
     margin: 2rem 0 3rem;
     border-radius: var(--radius-md);
     overflow: hidden;
     box-shadow: var(--shadow-md);
 }
 
 .post-featured-image img {
     width: 100%;
     height: auto;
     display: block;
     transition: transform 0.7s ease;
 }
 
 .post-featured-image:hover img {
     transform: scale(1.02);
 }
 
 /* Markdown Content Styling */
 .single-post-body {
     font-size: 1.125rem; /* 18px for better readability */
 }
 
 .single-post-body h2 {
     font-size: 1.75rem;
     margin-top: 3rem;
     margin-bottom: 1rem;
     font-weight: 700;
     color: var(--color-text-primary);
     letter-spacing: -0.02em;
 }
 
 .single-post-body h3 {
     font-size: 1.4rem;
     margin-top: 2.5rem;
     margin-bottom: 0.75rem;
     font-weight: 600;
 }
 
 .single-post-body p {
     margin-bottom: 1.5rem;
     color: var(--color-text-secondary);
 }
 
 .single-post-body ul, .single-post-body ol {
     margin-bottom: 1.5rem;
     padding-left: 1.5rem;
     color: var(--color-text-secondary);
 }
 
 .single-post-body li {
     margin-bottom: 0.5rem;
     padding-left: 0.5rem;
 }
 
 .single-post-body blockquote {
     border-left: 3px solid var(--color-accent);
     padding-left: 1.5rem;
     margin: 2rem 0;
     font-style: italic;
     color: var(--color-text-primary);
     font-size: 1.25rem;
     line-height: 1.6;
 }
 
 .single-post-body code {
     font-family: var(--font-mono);
     font-size: 0.85em;
     background: var(--color-bg-subtle);
     padding: 0.2rem 0.4rem;
     border-radius: 4px;
     color: var(--color-text-primary);
 }
 
 .single-post-body pre {
     background: var(--color-bg-subtle);
     padding: 1.5rem;
     border-radius: var(--radius-md);
     overflow-x: auto;
     margin: 2rem 0;
     border: 1px solid var(--color-border);
 }
 
 .single-post-body pre code {
     background: none;
     padding: 0;
     color: var(--color-text-secondary);
     font-size: 0.9em;
 }
 
 .single-post-body a {
     color: var(--color-accent);
     text-decoration: none;
     border-bottom: 1px solid rgba(33, 150, 243, 0.3);
     transition: border-color var(--transition-base);
 }
 
 .single-post-body a:hover {
     border-color: var(--color-accent);
 }
 
 /* Footer */
 .site-footer {
     margin-top: auto;
     padding: 3rem 0;
     border-top: 1px solid var(--color-border);
     text-align: center;
     background: var(--color-bg-subtle);
 }
 
 .social-link {
     margin: 0 1rem;
     color: var(--color-text-tertiary);
     text-decoration: none;
     font-weight: 500;
     transition: color var(--transition-base);
 }
 
 .social-link:hover {
     color: var(--color-text-primary);
 }
 
 /* Animations */
 @keyframes fadeIn {
     from { opacity: 0; transform: translateY(10px); }
     to { opacity: 1; transform: translateY(0); }
 }
 
 /* Mobile Optimization */
 @media (max-width: 768px) {
     .single-post-title {
         font-size: 2rem;
     }
     
     .header-content {
         gap: 1rem;
     }
     
     .post-title {
         font-size: 1.5rem;
     }
 }