/* CSS Custom Properties for Dark Theme */
:root {
  /* Colors */
  --color-bg: #0a0a0a;
  --color-bg-secondary: #1a1a1a;
  --color-text: #e5e5e5;
  --color-text-secondary: #a0a0a0;
  --color-text-muted: #666666;
  --color-accent: #4a9eff;
  --color-accent-hover: #6bb0ff;
  --color-border: #333333;
  --color-border-light: #2a2a2a;
  
  /* Typography */
  --font-primary: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, "Courier New", monospace;
  
  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
  
  /* Layout */
  --container-max-width: 800px;
  --border-radius: 8px;
  --transition: all 0.2s ease;
}

/* Reset and Base Styles */
* {
  box-sizing: border-box;
}

html {
  font-size: 18px;
  line-height: 1.6;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-primary);
  background-color: var(--color-bg);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* Site Layout */
.site-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-main {
  flex: 1;
}

/* Header */
.site-header {
  padding: var(--space-xl) 0;
  border-bottom: 1px solid var(--color-border-light);
  margin-bottom: var(--space-3xl);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-lg);
}

.site-branding {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.site-avatar img {
  width: 60px;
  height: 60px;
  transition: var(--transition);
  filter: drop-shadow(0 0 10px rgba(74, 158, 255, 0.4));
  animation: pulse-glow 3s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% {
    filter: drop-shadow(0 0 10px rgba(74, 158, 255, 0.4));
  }
  50% {
    filter: drop-shadow(0 0 15px rgba(74, 158, 255, 0.8));
  }
}

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

.site-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.site-name {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.site-name a {
  color: var(--color-text);
  text-decoration: none;
  transition: var(--transition);
}

.site-name a:hover {
  color: var(--color-accent);
}

.site-description {
  margin: 0;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-weight: 400;
}

/* Navigation */
.site-nav {
  display: flex;
  gap: var(--space-lg);
}

.site-nav a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition);
  position: relative;
}

.site-nav a:hover {
  color: var(--color-accent);
}

.site-nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: width 0.3s ease;
}

.site-nav a:hover::after {
  width: 100%;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin: var(--space-xl) 0 var(--space-md) 0;
  color: var(--color-text);
}

h1 {
  font-size: 2.5rem;
  margin-top: 0;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

p {
  margin: var(--space-md) 0;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: var(--transition);
}

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

/* Lists */
ul, ol {
  margin: var(--space-md) 0;
  padding-left: var(--space-lg);
  color: var(--color-text-secondary);
}

li {
  margin: var(--space-xs) 0;
  line-height: 1.6;
}

/* Code */
code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background-color: var(--color-bg-secondary);
  padding: 0.2em 0.4em;
  border-radius: 4px;
  color: var(--color-accent);
}

pre {
  background-color: var(--color-bg-secondary);
  padding: var(--space-md);
  border-radius: var(--border-radius);
  overflow-x: auto;
  margin: var(--space-md) 0;
  border: 1px solid var(--color-border);
}

pre code {
  background: none;
  padding: 0;
  color: var(--color-text);
}

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

/* Blockquotes */
blockquote {
  margin: var(--space-lg) 0;
  padding: var(--space-md) var(--space-lg);
  border-left: 4px solid var(--color-accent);
  background-color: var(--color-bg-secondary);
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
  font-style: italic;
  color: var(--color-text-secondary);
}

/* Posts */
.posts {
  display: flex;
  flex-direction: column;
  gap: var(--space-3xl);
}

.post-preview {
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-border-light);
}

.post-preview:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.post-title {
  margin: 0 0 var(--space-md) 0;
  font-size: 1.75rem;
}

.post-title a {
  color: var(--color-text);
  text-decoration: none;
  transition: var(--transition);
}

.post-title a:hover {
  color: var(--color-accent);
}

.post-excerpt {
  color: var(--color-text-secondary);
  margin: var(--space-md) 0;
  line-height: 1.7;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin: var(--space-md) 0;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.read-more {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-weight: 500;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: var(--transition);
}

.read-more:hover {
  transform: translateX(4px);
}

/* Single Post */
.post-header {
  margin-bottom: var(--space-2xl);
  text-align: center;
}

.post-content {
  margin: var(--space-2xl) 0;
}

.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4,
.post-content h5,
.post-content h6 {
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
}

.post-content h1:first-child,
.post-content h2:first-child,
.post-content h3:first-child {
  margin-top: 0;
}

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

.social-links {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--color-bg-secondary);
  color: var(--color-text-secondary);
  transition: var(--transition);
}

.social-links a:hover {
  background-color: var(--color-accent);
  color: var(--color-bg);
  transform: translateY(-2px);
}

.copyright {
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* Responsive Design */
@media (max-width: 768px) {
  :root {
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
  }
  
  html {
    font-size: 16px;
  }
  
  .header-content {
    flex-direction: column;
    text-align: center;
    gap: var(--space-md);
  }
  
  .site-branding {
    flex-direction: column;
    text-align: center;
  }
  
  .site-nav {
    gap: var(--space-md);
  }
  
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  .post-title {
    font-size: 1.5rem;
  }
  
  .container {
    padding: 0 var(--space-sm);
  }
}

@media (max-width: 480px) {
  .site-nav {
    flex-direction: column;
    gap: var(--space-sm);
  }
  
  .social-links {
    gap: var(--space-sm);
  }
  
  .social-links a {
    width: 36px;
    height: 36px;
  }
}

/* Focus styles for accessibility */
a:focus,
button:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Selection styles */
::selection {
  background-color: var(--color-accent);
  color: var(--color-bg);
}

::-moz-selection {
  background-color: var(--color-accent);
  color: var(--color-bg);
}