/* ========================================
   Life OS Design System v2.0
   World-Class Design for All Sites
   Created: 2026-02-05
======================================== */

:root {
  /* 🎨 Unified Color Palette */
  --primary: #8B5CF6;           /* Purple - Main brand */
  --primary-light: #A78BFA;     /* Light purple */
  --primary-dark: #7C3AED;      /* Dark purple */
  --secondary: #06B6D4;        /* Cyan accent */
  --accent: #10B981;           /* Green success */
  --warning: #F59E0B;          /* Amber warnings */
  --danger: #EF4444;           /* Red errors */
  
  /* 🌙 Dark Theme */
  --bg-dark: #0a0a0f;
  --bg-card: #15151a;
  --bg-elevated: #1a1a25;
  --bg-hover: #252530;
  
  /* 📝 Text */
  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --text-muted: #666680;
  
  /* 🎯 Brand Colors */
  --brand-purple: #8B5CF6;
  --brand-blue: #3B82F6;
  --brand-teal: #14B8A6;
  --brand-pink: #EC4899;
  
  /* 📏 Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  
  /* 📐 Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --font-display: 'Space Grotesk', sans-serif;
  
  /* 🎬 Animations */
  --ease-fast: 0.15s ease;
  --ease-normal: 0.3s ease;
  --ease-slow: 0.5s ease;
  
  /* 🖼️ Effects */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.5);
  --glow: 0 0 20px rgba(139, 92, 246, 0.3);
  --glass: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);
}

/* 🌙 Dark Mode Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* 🎯 Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(2rem, 4vw, 3rem); letter-spacing: -0.01em; }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2vw, 1.5rem); }

p {
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--ease-fast);
}

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

/* 🃏 Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: var(--space-xl);
  transition: all var(--ease-normal);
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: var(--glow);
}

/* 🎨 Gradient Text */
.gradient-text {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ✨ Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  border-radius: 12px;
  font-weight: 600;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  transition: all var(--ease-normal);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  box-shadow: var(--shadow-md), var(--glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), 0 0 30px rgba(139, 92, 246, 0.4);
}

.btn-secondary {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
  background: var(--bg-hover);
  border-color: var(--primary);
}

/* 🎯 Hero Section */
.hero {
  padding: var(--space-3xl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.hero h1 {
  margin-bottom: var(--space-lg);
}

.hero p {
  font-size: 1.25rem;
  max-width: 600px;
  margin: 0 auto var(--space-xl);
}

/* 📊 Stats */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-lg);
  padding: var(--space-2xl) 0;
}

.stat {
  text-align: center;
  padding: var(--space-lg);
}

.stat h3 {
  font-size: 2.5rem;
  color: var(--primary);
  margin-bottom: var(--space-sm);
}

.stat p {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* 🔗 Links Grid */
.links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: center;
  margin-top: var(--space-xl);
}

.links .link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  background: var(--bg-elevated);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  color: var(--text-primary);
  font-weight: 500;
  transition: all var(--ease-normal);
}

.links .link:hover {
  background: var(--bg-hover);
  border-color: var(--primary);
  transform: translateY(-2px);
  color: var(--primary);
}

/* 🎭 Cards Grid */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
}

/* 📱 Responsive */
@media (max-width: 768px) {
  .hero { padding: var(--space-2xl) 0; }
  .hero h1 { font-size: 2.5rem; }
  .card { padding: var(--space-lg); }
  .links { flex-direction: column; align-items: center; }
  .links .link { width: 100%; max-width: 300px; justify-content: center; }
}

/* 🖼️ Images */
img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
}

/* 📝 Code */
code, pre {
  font-family: var(--font-mono);
  background: var(--bg-elevated);
  border-radius: 6px;
}

code {
  padding: 0.125em 0.375em;
}

pre {
  padding: var(--space-md);
  overflow-x: auto;
}

/* 🎬 Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.animate-fade-in {
  animation: fadeIn 0.5s ease forwards;
}

/* 🏷️ Tags */
.tag {
  display: inline-block;
  padding: var(--space-xs) var(--space-sm);
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-right: var(--space-sm);
  margin-bottom: var(--space-sm);
}

/* 📦 Sections */
.section {
  padding: var(--space-3xl) 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

/* 🎯 Footer */
footer {
  padding: var(--space-2xl) 0;
  text-align: center;
  color: var(--text-muted);
  border-top: 1px solid var(--glass-border);
  margin-top: var(--space-3xl);
}

/* 🔍 Utilities */
.text-center { text-align: center; }
.text-primary { color: var(--primary); }
.text-muted { color: var(--text-muted); }

.mt-1 { margin-top: var(--space-md); }
.mt-2 { margin-top: var(--space-xl); }
.mt-3 { margin-top: var(--space-2xl); }

.mb-1 { margin-bottom: var(--space-md); }
.mb-2 { margin-bottom: var(--space-xl); }
.mb-3 { margin-bottom: var(--space-2xl); }

/* ✨ Loading States */
.skeleton {
  background: linear-gradient(90deg, var(--bg-elevated) 25%, var(--bg-hover) 50%, var(--bg-elevated) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}

/* ========================================
   📰 ARTICLE STYLING
   Beautiful Typography for Markdown Content
======================================== */

/* Navigation for Articles */
.glass-nav {
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  padding: var(--space-md) 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: var(--space-xl);
}

.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
  transition: color var(--ease-fast);
}

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

/* Article Container */
.container {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-xl);
}

.article-content {
  background: transparent;
  border: none;
  padding: 0;
}

.article-content:hover {
  transform: none;
  box-shadow: none;
}

/* Article Header */
.article-header {
  margin-bottom: var(--space-2xl);
  text-align: center;
}

.article-category {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-lg);
}

.article-title {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: var(--space-lg);
  line-height: 1.1;
}

.article-meta {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  color: var(--text-muted);
  font-size: 0.875rem;
}

.article-meta span {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* Article Body - The Good Stuff */
.article-body {
  font-size: 1.125rem;
  line-height: 1.8;
}

.article-body p {
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
}

.article-body .lead {
  font-size: 1.25rem;
  color: var(--text-primary);
  line-height: 1.7;
  margin-bottom: var(--space-xl);
  padding-left: 0;
  border-left: none;
}

/* Headers in Articles */
.article-body h2 {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  margin-top: var(--space-3xl);
  margin-bottom: var(--space-lg);
  color: var(--text-primary);
  position: relative;
  padding-bottom: var(--space-sm);
}

.article-body h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 2px;
}

.article-body h3 {
  font-size: clamp(1.35rem, 2.5vw, 1.75rem);
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}

.article-body h4 {
  font-size: 1.25rem;
  margin-top: var(--space-xl);
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}

/* Links in Articles */
.article-body a {
  color: var(--primary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: all var(--ease-fast);
  padding-bottom: 2px;
}

.article-body a:hover {
  color: var(--primary-light);
  border-bottom-color: var(--primary-light);
}

/* Lists */
.article-body ul, .article-body ol {
  margin-bottom: var(--space-lg);
  padding-left: var(--space-xl);
}

.article-body ul {
  list-style: none;
}

.article-body ul li {
  position: relative;
  padding-left: var(--space-lg);
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
}

.article-body ul li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: bold;
}

.article-body ol {
  counter-reset: ol-counter;
}

.article-body ol li {
  counter-increment: ol-counter;
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
  list-style: none;
  position: relative;
  padding-left: var(--space-lg);
}

.article-body ol li::before {
  content: counter(ol-counter) '.';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 700;
  font-size: 1.1em;
}

.article-body li {
  margin-bottom: var(--space-sm);
  line-height: 1.6;
}

/* Strong/Bold */
.article-body strong {
  color: var(--text-primary);
  font-weight: 600;
}

.article-body em {
  font-style: italic;
}

/* Code Blocks */
.article-body pre {
  background: var(--bg-elevated);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: var(--space-lg);
  overflow-x: auto;
  margin: var(--space-xl) 0;
  position: relative;
}

.article-body pre::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 12px 12px 0 0;
}

.article-body code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: transparent;
  padding: 0;
  color: var(--text-primary);
}

.article-body pre code {
  line-height: 1.6;
}

/* Inline Code */
.article-body p code, 
.article-body li code {
  background: var(--bg-elevated);
  padding: 0.2em 0.5em;
  border-radius: 6px;
  font-size: 0.875em;
  color: var(--secondary);
  border: 1px solid var(--glass-border);
}

/* Blockquotes */
.article-body blockquote {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(6, 182, 212, 0.1));
  border-left: 4px solid var(--primary);
  border-radius: 0 12px 12px 0;
  padding: var(--space-lg) var(--space-xl);
  margin: var(--space-xl) 0;
  position: relative;
}

.article-body blockquote::before {
  content: '"';
  position: absolute;
  top: -10px;
  left: 20px;
  font-size: 4rem;
  color: var(--primary);
  opacity: 0.3;
  font-family: Georgia, serif;
}

.article-body blockquote p {
  color: var(--text-primary);
  font-style: italic;
  font-size: 1.1rem;
  margin: 0;
}

.article-body blockquote cite {
  display: block;
  margin-top: var(--space-md);
  color: var(--text-muted);
  font-size: 0.875rem;
  font-style: normal;
}

.article-body blockquote cite::before {
  content: '— ';
}

/* Tables */
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-xl) 0;
  background: var(--bg-card);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--glass-border);
}

.article-body table th,
.article-body table td {
  padding: var(--space-md) var(--space-lg);
  text-align: left;
  border-bottom: 1px solid var(--glass-border);
}

.article-body table th {
  background: var(--bg-elevated);
  color: var(--text-primary);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

.article-body table td {
  color: var(--text-secondary);
}

.article-body table tr:last-child td {
  border-bottom: none;
}

.article-body table tr:hover td {
  background: var(--bg-hover);
}

/* Horizontal Rules */
.article-body hr {
  border: none;
  border-top: 1px solid var(--glass-border);
  margin: var(--space-3xl) 0;
  position: relative;
}

.article-body hr::after {
  content: '◆';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--bg-dark);
  padding: 0 var(--space-lg);
  color: var(--primary);
  font-size: 0.75rem;
}

/* Images in Articles */
.article-body img {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  margin: var(--space-xl) 0;
  box-shadow: var(--shadow-lg);
}

.article-body figure {
  margin: var(--space-xl) 0;
}

.article-body figcaption {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-top: var(--space-sm);
  font-style: italic;
}

/* Key Points Box */
.article-body .key-points {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(6, 182, 212, 0.1));
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: 12px;
  padding: var(--space-xl);
  margin: var(--space-xl) 0;
}

.article-body .key-points h4 {
  color: var(--accent);
  margin-top: 0;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.article-body .key-points h4::before {
  content: '💡';
}

.article-body .key-points ul {
  margin-bottom: 0;
}

.article-body .key-points ul li::before {
  content: '✓';
  color: var(--accent);
}

/* Warning/Note Box */
.article-body .note,
.article-body .warning {
  border-radius: 12px;
  padding: var(--space-lg);
  margin: var(--space-xl) 0;
}

.article-body .note {
  background: rgba(139, 92, 246, 0.1);
  border-left: 4px solid var(--primary);
}

.article-body .warning {
  background: rgba(245, 158, 11, 0.1);
  border-left: 4px solid var(--warning);
}

.article-body .note h4,
.article-body .warning h4 {
  margin-top: 0;
  margin-bottom: var(--space-md);
}

.article-body .note h4 {
  color: var(--primary);
}

.article-body .warning h4 {
  color: var(--warning);
}

/* Back Link */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-bottom: var(--space-xl);
  transition: color var(--ease-fast);
}

.back-link:hover {
  color: var(--primary);
}

/* Responsive Article */
@media (max-width: 768px) {
  .container {
    padding: var(--space-xl) var(--space-md);
  }
  
  .article-body {
    font-size: 1rem;
  }
  
  .article-body .lead {
    font-size: 1.1rem;
  }
  
  .article-body h2 {
    margin-top: var(--space-2xl);
  }
  
  .article-body pre {
    padding: var(--space-md);
    font-size: 0.875rem;
  }
  
  .article-meta {
    flex-direction: column;
    gap: var(--space-sm);
  }
}