/**
 * Modern CSS Design System
 * A comprehensive design system with modern color palette, typography, and utilities
 */

/* ============================================
   CSS VARIABLES - Design Tokens
   ============================================ */
:root {
  /* Color Palette */
  --color-primary: #2563eb;
  --color-primary-dark: #1e40af;
  --color-primary-light: #3b82f6;

  --color-secondary: #1f2937;
  --color-secondary-dark: #111827;
  --color-secondary-light: #374151;

  --color-accent: #8b5cf6;
  --color-accent-dark: #7c3aed;
  --color-accent-light: #a78bfa;

  --color-background: #ffffff;
  --color-background-alt: #f9fafb;
  --color-background-dark: #f3f4f6;

  --color-text: #1f2937;
  --color-text-light: #6b7280;
  --color-text-muted: #9ca3af;

  --color-border: #e5e7eb;
  --color-border-light: #f3f4f6;

  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #3b82f6;

  /* Typography */
  --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  --font-family-heading: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-family-code: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;

  --font-size-xs: 0.75rem;     /* 12px */
  --font-size-sm: 0.875rem;    /* 14px */
  --font-size-base: 1rem;      /* 16px */
  --font-size-lg: 1.125rem;    /* 18px */
  --font-size-xl: 1.25rem;     /* 20px */
  --font-size-2xl: 1.5rem;     /* 24px */
  --font-size-3xl: 1.875rem;   /* 30px */
  --font-size-4xl: 2.25rem;    /* 36px */
  --font-size-5xl: 3rem;       /* 48px */

  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Spacing Scale */
  --space-0: 0;
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  --space-20: 5rem;     /* 80px */
  --space-24: 6rem;     /* 96px */

  /* Border Radius */
  --radius-sm: 0.125rem;   /* 2px */
  --radius-base: 0.25rem;  /* 4px */
  --radius-md: 0.375rem;   /* 6px */
  --radius-lg: 0.5rem;     /* 8px */
  --radius-xl: 0.75rem;    /* 12px */
  --radius-2xl: 1rem;      /* 16px */
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-base: 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);

  /* Transitions */
  --transition-base: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 100ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Container */
  --container-max-width: 1200px;
  --container-padding: var(--space-4);
}

/* ============================================
   TYPOGRAPHY STYLES
   ============================================ */

/* Base Typography */
body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-background);
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-secondary);
  margin-top: var(--space-8);
  margin-bottom: var(--space-4);
}

h1 {
  font-size: var(--font-size-5xl);
  margin-top: 0;
}

/* Override for intro header - ensure white text on hero images */
.intro-header .site-heading h1,
.intro-header .page-heading h1,
.intro-header .post-heading h1 {
  color: #fff !important;
}

.intro-header .site-heading .subheading,
.intro-header .page-heading .subheading,
.intro-header .post-heading .subheading {
  color: #fff !important;
}

h2 {
  font-size: var(--font-size-4xl);
}

h3 {
  font-size: var(--font-size-3xl);
}

h4 {
  font-size: var(--font-size-2xl);
}

h5 {
  font-size: var(--font-size-xl);
}

h6 {
  font-size: var(--font-size-lg);
}

/* Paragraphs */
p {
  margin-top: 0;
  margin-bottom: var(--space-4);
  line-height: var(--line-height-relaxed);
}

/* Links */
a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-base);
}

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

a:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Code */
code {
  font-family: var(--font-family-code);
  font-size: 0.875em;
  color: var(--color-accent);
  background-color: var(--color-background-alt);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-base);
}

pre {
  font-family: var(--font-family-code);
  font-size: var(--font-size-sm);
  background-color: var(--color-secondary);
  color: var(--color-background);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  margin: var(--space-6) 0;
}

pre code {
  background-color: transparent;
  color: inherit;
  padding: 0;
  border-radius: 0;
}

/* Lists */
ul, ol {
  margin-top: 0;
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
}

li {
  margin-bottom: var(--space-2);
}

/* Blockquote */
blockquote {
  border-left: 4px solid var(--color-primary);
  padding-left: var(--space-4);
  margin: var(--space-6) 0;
  color: var(--color-text-light);
  font-style: italic;
}

/* ============================================
   CONTAINER & LAYOUT UTILITIES
   ============================================ */

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.container-narrow {
  max-width: 768px;
}

.container-wide {
  max-width: 1400px;
}

.container-fluid {
  width: 100%;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

/* ============================================
   SPACING UTILITIES
   ============================================ */

.mt-0 { margin-top: var(--space-0); }
.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }

.mb-0 { margin-bottom: var(--space-0); }
.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-12 { margin-bottom: var(--space-12); }

.mx-auto { margin-left: auto; margin-right: auto; }

.p-0 { padding: var(--space-0); }
.p-1 { padding: var(--space-1); }
.p-2 { padding: var(--space-2); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

/* ============================================
   INTERACTIVE ELEMENTS
   ============================================ */

/* Buttons */
.btn {
  display: inline-block;
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  text-align: center;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  line-height: 1;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
  background-color: var(--color-secondary-dark);
  text-decoration: none;
  transform: translateY(-1px);
}

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

.btn-accent:hover {
  background-color: var(--color-accent-dark);
  text-decoration: none;
  transform: translateY(-1px);
}

/* Cards */
.card {
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: all var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  margin-top: 0;
  margin-bottom: var(--space-3);
  color: var(--color-secondary);
}

.card-body {
  margin-bottom: var(--space-4);
}

.card-footer {
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border-light);
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

/* Text Alignment */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

/* Font Weights */
.font-light { font-weight: var(--font-weight-light); }
.font-normal { font-weight: var(--font-weight-normal); }
.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }

/* Text Colors */
.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }
.text-accent { color: var(--color-accent); }
.text-muted { color: var(--color-text-muted); }

/* Background Colors */
.bg-white { background-color: var(--color-background); }
.bg-gray { background-color: var(--color-background-alt); }
.bg-primary { background-color: var(--color-primary); }
.bg-secondary { background-color: var(--color-secondary); }

/* Borders */
.border { border: 1px solid var(--color-border); }
.border-0 { border: none; }
.border-top { border-top: 1px solid var(--color-border); }
.border-bottom { border-bottom: 1px solid var(--color-border); }

/* Rounded Corners */
.rounded { border-radius: var(--radius-base); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-full { border-radius: var(--radius-full); }

/* Shadows */
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow { box-shadow: var(--shadow-base); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }

/* Display */
.block { display: block; }
.inline-block { display: inline-block; }
.inline { display: inline; }
.flex { display: flex; }
.grid { display: grid; }
.hidden { display: none; }

/* Flexbox Utilities */
.flex-row { flex-direction: row; }
.flex-col { flex-direction: column; }
.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

/* Width */
.w-full { width: 100%; }
.w-auto { width: auto; }

/* Height */
.h-full { height: 100%; }
.h-auto { height: auto; }

/* Overflow */
.overflow-auto { overflow: auto; }
.overflow-hidden { overflow: hidden; }

/* Transitions - for interactive elements */
.transition-all {
  transition: all var(--transition-base);
}

.transition-colors {
  transition: color var(--transition-base), background-color var(--transition-base), border-color var(--transition-base);
}

.transition-transform {
  transition: transform var(--transition-base);
}

/* Hover Effects */
.hover-lift {
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.hover-lift:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ============================================
   POST PREVIEW CARDS
   ============================================ */

/* Post preview specific styles */
.post-preview {
  margin-bottom: var(--space-6);
}

.post-preview.card {
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.post-preview.card:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.post-preview .post-link {
  text-decoration: none;
  color: inherit;
  display: block;
  transition: color var(--transition-base);
}

.post-preview .post-title {
  color: var(--color-secondary);
  font-size: 20px;
  font-weight: 600;
  margin-top: 0;
  margin-bottom: var(--space-3);
  line-height: var(--line-height-tight);
  transition: color var(--transition-base);
}

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

.post-preview .post-meta {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  margin-bottom: 0;
}

.post-preview .post-meta.text-muted {
  color: var(--color-text-muted);
}

/* ============================================
   NAVIGATION STYLES
   ============================================ */

/* Active Navigation Item */
.navbar-nav > li.active > a {
  color: var(--color-primary) !important;
  font-weight: var(--font-weight-semibold);
  position: relative;
}

/* Active indicator - underline */
.navbar-nav > li.active > a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: var(--radius-sm);
}

/* Hover effect for navigation items */
.navbar-nav > li > a {
  transition: color var(--transition-base);
}

.navbar-nav > li > a:hover {
  color: var(--color-primary-light) !important;
}

/* ============================================
   PROJECT CARDS
   ============================================ */

/* Project card enhancements */
.project-card {
  transition: all var(--transition-base);
  border-left: 4px solid var(--color-border);
}

.project-card:hover {
  border-left-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.project-card h2 {
  transition: color var(--transition-base);
}

.project-card:hover h2 {
  color: var(--color-accent) !important;
}

/* Technology badges */
.project-card .badge {
  transition: all var(--transition-base);
}

.project-card .badge:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-md);
}

/* ============================================
   RESPONSIVE UTILITIES
   ============================================ */

/* Mobile First Approach */
@media (min-width: 640px) {
  :root {
    --container-padding: var(--space-6);
  }
}

@media (min-width: 768px) {
  :root {
    --container-padding: var(--space-8);
  }
}

@media (min-width: 1024px) {
  :root {
    --container-padding: var(--space-12);
  }
}

/* ============================================
   MOBILE RESPONSIVE NAVIGATION
   ============================================ */

/* Mobile Navigation Styles (<768px) */
@media (max-width: 767px) {
  /* Hamburger Menu Button Styling */
  .navbar-toggle {
    background-color: var(--color-primary) !important;
    border: 2px solid var(--color-primary) !important;
    border-radius: var(--radius-md);
    padding: 10px 12px !important;
    min-width: 44px;
    min-height: 44px;
    margin-right: 0 !important;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
  }

  .navbar-toggle:hover,
  .navbar-toggle:focus {
    background-color: var(--color-primary-dark) !important;
    border-color: var(--color-primary-dark) !important;
  }

  /* Hamburger Icon Bars */
  .navbar-toggle .icon-bar {
    background-color: white !important;
    height: 3px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
  }

  /* Mobile Navigation Menu */
  .navbar-collapse {
    border-top: 1px solid var(--color-border) !important;
    box-shadow: var(--shadow-md);
    max-height: 400px;
    overflow-y: auto;
  }

  .navbar-collapse.in,
  .navbar-collapse.collapsing {
    background-color: var(--color-background);
  }

  /* Mobile Navigation Items */
  .navbar-nav {
    margin: 0 !important;
  }

  .navbar-nav > li {
    border-bottom: 1px solid var(--color-border-light);
  }

  .navbar-nav > li:last-child {
    border-bottom: none;
  }

  .navbar-nav > li > a {
    padding: 16px 20px !important;
    min-height: 44px;
    font-size: var(--font-size-base) !important;
    display: flex !important;
    align-items: center;
    color: var(--color-secondary) !important;
    transition: all var(--transition-base);
  }

  .navbar-nav > li > a:hover,
  .navbar-nav > li > a:focus {
    background-color: var(--color-background-alt) !important;
    color: var(--color-primary) !important;
  }

  /* Active Navigation Item on Mobile */
  .navbar-nav > li.active > a {
    background-color: var(--color-primary) !important;
    color: white !important;
    font-weight: var(--font-weight-semibold);
  }

  /* Remove the ::after underline on mobile */
  .navbar-nav > li.active > a::after {
    display: none;
  }

  /* Mobile Navigation Icons */
  .navbar-nav > li > a i {
    font-size: var(--font-size-xl);
  }

  /* Brand text sizing */
  .navbar-brand {
    font-size: var(--font-size-lg) !important;
  }

  /* Container padding adjustments */
  .container,
  .container-fluid {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }

  /* Header text sizing */
  .intro-header .subheading {
    font-size: var(--font-size-base);
  }

  /* Post cards padding */
  .post-preview.card,
  .card {
    padding: var(--space-4);
  }

  /* Project cards */
  .project-card {
    padding: var(--space-5) !important;
  }
}

/* Small Mobile Devices (320px-480px) */
@media (max-width: 480px) {
  /* Tighter spacing for very small screens */
  .navbar-brand {
    font-size: var(--font-size-base) !important;
  }

  .post-preview .post-title {
    font-size: 18px;
  }

  .project-card h2 {
    font-size: var(--font-size-xl) !important;
  }
}

/* ============================================
   FOOTER
   ============================================ */

footer {
  background-color: var(--color-secondary);
  color: var(--color-text-light);
  padding: var(--space-16) 0 var(--space-8);
  margin-top: var(--space-16);
}

footer hr {
  display: none; /* Hide the hr before footer for cleaner design */
}

/* Footer Container */
.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-10);
  margin-bottom: var(--space-10);
}

/* Footer Sections */
.footer-section {
  text-align: center;
}

.footer-section h3 {
  color: var(--color-text-light);
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Quick Links */
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: var(--space-3);
}

.footer-links a {
  color: var(--color-text-light);
  text-decoration: none;
  transition: color var(--transition-base);
  font-size: var(--font-size-base);
}

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

/* Social Links */
.footer-social {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--color-text-light);
  transition: all var(--transition-base);
  text-decoration: none;
}

.footer-social a:hover {
  background-color: var(--color-primary);
  color: var(--color-text-light);
  transform: translateY(-2px);
}

.footer-social i {
  font-size: var(--font-size-xl);
}

/* Copyright and Credits */
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-6);
  margin-top: var(--space-6);
  text-align: center;
}

.footer-copyright {
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--font-size-sm);
  margin: var(--space-2) 0;
}

.footer-copyright a {
  color: var(--color-primary-light);
  text-decoration: none;
  transition: color var(--transition-base);
}

.footer-copyright a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

/* About Section in Footer */
.footer-about {
  max-width: 400px;
  margin: 0 auto;
}

.footer-about p {
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--font-size-sm);
  line-height: 1.6;
  margin-bottom: var(--space-4);
}

/* Footer Responsive */
@media (max-width: 768px) {
  footer {
    padding: var(--space-12) 0 var(--space-6);
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .footer-section {
    text-align: center;
  }

  .footer-social {
    justify-content: center;
  }
}

/* ============================================
   BLOG POST PAGE STYLES
   ============================================ */

/* Post Content Container - Optimal Reading Width */
article .col-lg-8,
article .col-md-10 {
  max-width: 750px;
  margin-left: auto;
  margin-right: auto;
  float: none;
}

/* Post Main Content Area */
article .container {
  padding-top: var(--space-8);
  padding-bottom: var(--space-12);
}

/* Post Heading Styles */
article h1,
article h2,
article h3,
article h4,
article h5,
article h6 {
  font-family: var(--font-family-heading);
  color: var(--color-secondary);
  font-weight: 700;
  line-height: 1.3;
  margin-top: var(--space-8);
  margin-bottom: var(--space-4);
}

article h1 {
  font-size: 32px;
  margin-top: var(--space-12);
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--color-border);
}

article h2 {
  font-size: 24px;
  margin-top: var(--space-10);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-border-light);
}

article h3 {
  font-size: 20px;
  color: var(--color-secondary-light);
}

article h4 {
  font-size: 18px;
  color: var(--color-secondary-light);
}

article h5 {
  font-size: 16px;
  color: var(--color-text);
}

article h6 {
  font-size: 14px;
  color: var(--color-text);
}

/* First heading should have less top margin */
article h1:first-child,
article h2:first-child {
  margin-top: 0;
}

/* Paragraph Styles */
article p {
  font-size: 19px;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

/* Lists */
article ul,
article ol {
  font-size: 19px;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: var(--space-6);
  padding-left: var(--space-8);
}

article li {
  margin-bottom: var(--space-3);
}

article li ul,
article li ol {
  margin-top: var(--space-2);
  margin-bottom: var(--space-2);
}

/* Links in Article */
article a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: all 150ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* Code Styles */
article code {
  font-family: var(--font-family-code);
  font-size: 0.9em;
  padding: 0.2em 0.4em;
  background-color: var(--color-background-alt);
  border-radius: var(--border-radius-sm);
  color: var(--color-accent);
  border: 1px solid var(--color-border);
}

/* Code Blocks */
article pre {
  background-color: var(--color-secondary);
  color: #e5e7eb;
  padding: var(--space-6);
  border-radius: var(--border-radius-md);
  overflow-x: auto;
  margin: var(--space-6) 0;
  border: 1px solid var(--color-secondary-dark);
  box-shadow: var(--shadow-md);
}

article pre code {
  background-color: transparent;
  border: none;
  padding: 0;
  color: inherit;
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

/* Highlight.js Code Blocks with Line Numbers */
article figure.highlight {
  background-color: var(--color-secondary);
  border-radius: var(--border-radius-md);
  overflow: hidden;
  margin: var(--space-6) 0;
  box-shadow: var(--shadow-md);
}

article figure.highlight table {
  margin: 0;
  width: 100%;
  border: none;
}

article figure.highlight .gutter {
  background-color: var(--color-secondary-dark);
  padding: var(--space-4);
  text-align: right;
  user-select: none;
  border-right: 1px solid rgba(255, 255, 255, 0.1);
}

article figure.highlight .gutter pre {
  background: transparent;
  border: none;
  box-shadow: none;
  margin: 0;
  padding: 0;
}

article figure.highlight .gutter .line {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

article figure.highlight .code {
  padding: var(--space-4) var(--space-6);
}

article figure.highlight .code pre {
  background: transparent;
  border: none;
  box-shadow: none;
  margin: 0;
  padding: 0;
  overflow-x: auto;
}

article figure.highlight .code .line {
  color: #e5e7eb;
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

/* Syntax Highlighting Colors */
article figure.highlight .keyword {
  color: #c678dd;
  font-weight: 600;
}

article figure.highlight .string {
  color: #98c379;
}

article figure.highlight .comment {
  color: #5c6370;
  font-style: italic;
}

article figure.highlight .function {
  color: #61afef;
}

article figure.highlight .number {
  color: #d19a66;
}

/* Post Metadata */
.post-tags,
.post-categories {
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-6);
}

.post-tags a,
.post-categories a {
  color: var(--color-primary);
  text-decoration: none;
  padding: var(--space-1) var(--space-3);
  background-color: var(--color-background-alt);
  border-radius: var(--border-radius-full);
  display: inline-block;
  margin-right: var(--space-2);
  margin-bottom: var(--space-2);
  border: 1px solid var(--color-border);
  transition: all 150ms cubic-bezier(0.4, 0, 0.2, 1);
}

.post-tags a:hover,
.post-categories a:hover {
  background-color: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
  transform: translateY(-1px);
}

/* Post Header */
.post-heading h1 {
  /* Font size is now controlled by css/style.css and css/base.css: 28px mobile, 42px desktop */
  font-weight: 700;
  color: white;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
  margin-bottom: var(--space-4);
}

.post-heading .meta {
  color: rgba(255, 255, 255, 0.9);
  font-size: var(--font-size-lg);
  font-weight: 400;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

/* Blockquotes */
article blockquote {
  border-left: 4px solid var(--color-primary);
  padding-left: var(--space-6);
  margin: var(--space-6) 0;
  color: var(--color-text-light);
  font-style: italic;
  background-color: var(--color-background-alt);
  padding: var(--space-4) var(--space-6);
  border-radius: var(--border-radius-md);
}

article blockquote p {
  margin-bottom: var(--space-2);
}

article blockquote p:last-child {
  margin-bottom: 0;
}

/* Images */
article img {
  max-width: 100%;
  height: auto;
  border-radius: var(--border-radius-md);
  margin: var(--space-6) 0;
  box-shadow: var(--shadow-md);
}

/* Tables */
article table {
  width: 100%;
  margin: var(--space-6) 0;
  border-collapse: collapse;
  font-size: var(--font-size-base);
}

article table th {
  background-color: var(--color-background-alt);
  padding: var(--space-3) var(--space-4);
  text-align: left;
  font-weight: 600;
  border-bottom: 2px solid var(--color-border);
}

article table td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border-light);
}

article table tr:hover {
  background-color: var(--color-background-alt);
}

/* Horizontal Rule */
article hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-10) 0;
}

/* Blog Post Responsive */
@media (max-width: 768px) {
  article .col-lg-8,
  article .col-md-10 {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }

  article p,
  article li {
    font-size: 17px;
  }

  .post-heading .meta {
    font-size: var(--font-size-base);
  }

  article pre,
  article figure.highlight {
    margin-left: calc(-1 * var(--space-4));
    margin-right: calc(-1 * var(--space-4));
    border-radius: 0;
  }
}

/* ============================================
   SEARCH FUNCTIONALITY
   ============================================ */

/* Search Container */
.search-container {
  position: relative;
  margin-bottom: var(--space-8);
  z-index: 100;
}

/* Search Input Wrapper */
.search-input-wrapper {
  position: relative;
  display: flex;
  gap: var(--space-2);
  align-items: center;
}

/* Search Input */
.search-input {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  padding-right: var(--space-12);
  font-size: var(--font-size-base);
  font-family: var(--font-family-base);
  color: var(--color-text);
  background-color: var(--color-background);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  outline: none;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.search-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-input::placeholder {
  color: var(--color-text-muted);
}

/* Search Button */
.search-button {
  position: absolute;
  right: 60px;
  top: 50%;
  transform: translateY(-50%);
  padding: var(--space-2);
  background: transparent;
  border: none;
  color: var(--color-text-light);
  cursor: pointer;
  transition: color var(--transition-base);
  font-size: var(--font-size-lg);
}

.search-button:hover {
  color: var(--color-primary);
}

/* Clear Search Button */
.clear-search-button {
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  padding: var(--space-2);
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: color var(--transition-base);
  font-size: var(--font-size-base);
}

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

/* Search Results Container */
.search-results {
  display: none;
  position: absolute;
  top: calc(100% + var(--space-2));
  left: 0;
  right: 0;
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  max-height: 500px;
  overflow-y: auto;
  z-index: 1000;
}

.search-results::-webkit-scrollbar {
  width: 8px;
}

.search-results::-webkit-scrollbar-track {
  background: var(--color-background-alt);
  border-radius: var(--radius-md);
}

.search-results::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-md);
}

.search-results::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}

/* Search Results Header */
.search-results-header {
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-background-alt);
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

.search-results-header strong {
  color: var(--color-primary);
  font-weight: 600;
}

/* Search Results List */
.search-results-list {
  padding: var(--space-2);
}

/* Search Result Item */
.search-result-item {
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-border-light);
  transition: background-color var(--transition-base);
}

.search-result-item:last-child {
  border-bottom: none;
}

.search-result-item:hover {
  background-color: var(--color-background-alt);
}

/* Search Result Title */
.search-result-title {
  margin: 0 0 var(--space-2) 0;
  font-size: var(--font-size-lg);
  font-weight: 600;
  line-height: 1.4;
}

.search-result-title a {
  color: var(--color-secondary);
  text-decoration: none;
  transition: color var(--transition-base);
}

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

/* Search Result Excerpt */
.search-result-excerpt {
  margin: 0 0 var(--space-3) 0;
  font-size: var(--font-size-sm);
  line-height: 1.6;
  color: var(--color-text-light);
}

/* Search Result Meta */
.search-result-meta {
  display: flex;
  gap: var(--space-4);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.search-result-meta i {
  margin-right: var(--space-1);
}

.search-result-date,
.search-result-category {
  display: flex;
  align-items: center;
}

/* Search No Results */
.search-no-results {
  padding: var(--space-8);
  text-align: center;
  color: var(--color-text-light);
}

.search-no-results i {
  font-size: var(--font-size-3xl);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.search-no-results p {
  margin: var(--space-2) 0;
}

/* Highlight Match */
mark {
  background-color: rgba(37, 99, 235, 0.15);
  color: var(--color-primary);
  padding: 2px 4px;
  border-radius: var(--radius-sm);
  font-weight: 500;
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .search-container {
    margin-bottom: var(--space-6);
  }

  .search-input {
    font-size: var(--font-size-sm);
    padding: var(--space-2) var(--space-3);
    padding-right: var(--space-10);
  }

  .search-button {
    right: 50px;
    font-size: var(--font-size-base);
  }

  .clear-search-button {
    right: 15px;
    font-size: var(--font-size-sm);
  }

  .search-results {
    max-height: 400px;
  }

  .search-result-title {
    font-size: var(--font-size-base);
  }

  .search-result-excerpt {
    font-size: var(--font-size-xs);
  }
}

@media (max-width: 480px) {
  .search-input {
    padding: var(--space-2);
    padding-right: var(--space-8);
  }

  .search-button {
    right: 40px;
  }

  .search-results {
    max-height: 300px;
  }

  .search-result-item {
    padding: var(--space-3);
  }
}

/* ============================================
   FEATURED POSTS SECTION
   ============================================ */

.featured-posts-section {
  margin-bottom: var(--space-16);
  padding: var(--space-8);
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
}

.featured-posts-title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-background);
  text-align: center;
  margin-bottom: var(--space-8);
  margin-top: 0;
}

.featured-posts-title i {
  color: #fbbf24;
  margin-right: var(--space-2);
}

.featured-posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-6);
}

.featured-post-card {
  background: var(--color-background);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  position: relative;
  box-shadow: var(--shadow-md);
}

.featured-post-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.featured-post-link {
  display: block;
  text-decoration: none;
  color: inherit;
  padding: var(--space-6);
}

.featured-post-link:hover {
  text-decoration: none;
}

.featured-post-badge {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  background: linear-gradient(135deg, #fbbf24, #f59e0b);
  color: var(--color-background);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  box-shadow: var(--shadow-md);
}

.featured-post-badge i {
  margin-right: var(--space-1);
}

.featured-post-title {
  font-size: 22px;
  font-weight: 600;
  color: var(--color-secondary);
  margin-top: 0;
  margin-bottom: var(--space-4);
  transition: color var(--transition-base);
}

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

.featured-post-excerpt {
  font-size: var(--font-size-base);
  color: var(--color-text-light);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-6);
  min-height: 4.5rem;
}

.featured-post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.featured-post-date,
.featured-post-category {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.featured-post-date i,
.featured-post-category i {
  margin-right: var(--space-1);
  color: var(--color-accent);
}

.featured-post-button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: var(--color-primary);
  color: var(--color-background);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  transition: background var(--transition-base), gap var(--transition-base);
}

.featured-post-card:hover .featured-post-button {
  background: var(--color-primary-dark);
  gap: var(--space-3);
}

.featured-post-button i {
  transition: transform var(--transition-base);
}

.featured-post-card:hover .featured-post-button i {
  transform: translateX(4px);
}

/* All Posts Section */
.all-posts-section {
  margin-top: var(--space-12);
}

.all-posts-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-secondary);
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-4);
  border-bottom: 3px solid var(--color-primary);
}

/* Featured Posts Mobile Responsive Design */
@media (max-width: 768px) {
  .featured-posts-section {
    padding: var(--space-6);
    margin-bottom: var(--space-12);
  }

  .featured-posts-title {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-6);
  }

  .featured-posts-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .featured-post-link {
    padding: var(--space-5);
  }

  .featured-post-title {
    font-size: 20px;
  }

  .featured-post-excerpt {
    font-size: var(--font-size-sm);
    min-height: auto;
  }

  .all-posts-title {
    font-size: var(--font-size-xl);
  }
}

@media (max-width: 480px) {
  .featured-posts-section {
    padding: var(--space-4);
    border-radius: var(--radius-xl);
  }

  .featured-posts-title {
    font-size: var(--font-size-xl);
  }

  .featured-post-card {
    border-radius: var(--radius-lg);
  }

  .featured-post-link {
    padding: var(--space-4);
  }

  .featured-post-title {
    font-size: 18px;
  }

  .featured-post-badge {
    font-size: 0.65rem;
    padding: 2px var(--space-2);
  }

  .featured-post-button {
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-sm);
  }

  .all-posts-title {
    font-size: var(--font-size-lg);
  }
}