/* ==================================================================
   BRUTALIST TERMINAL - Design System
   A HackerNews-inspired blog theme with industrial aesthetics
   ================================================================== */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600;700&family=Source+Serif+4:opsz,wght@8..60,400;8..60,600;8..60,700&display=swap');

/* ------------------------------------------------------------------
   CSS VARIABLES
   ------------------------------------------------------------------ */
:root {
  /* Colors */
  --bg-primary: #1a1a1a;
  --bg-secondary: #252525;
  --bg-tertiary: #2d2d2d;
  --bg-hover: #333333;

  --text-primary: #e8e6e3;
  --text-secondary: #9a9a9a;
  --text-muted: #666666;

  --accent-primary: #ff6600;
  --accent-secondary: #ffb347;
  --accent-glow: rgba(255, 102, 0, 0.15);

  --link-color: #4a9eff;
  --link-hover: #7ab8ff;

  --border-color: #3a3a3a;
  --border-accent: #ff6600;

  /* Typography */
  --font-mono: 'IBM Plex Mono', 'Consolas', 'Monaco', monospace;
  --font-serif: 'Source Serif 4', Georgia, serif;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;

  /* Layout */
  --max-width: 900px;
  --header-height: 60px;

  /* Effects */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --shadow-glow: 0 0 20px rgba(255, 102, 0, 0.1);
}

/* ------------------------------------------------------------------
   RESET & BASE
   ------------------------------------------------------------------ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* CRT Scanline Effect (subtle) */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  background: repeating-linear-gradient(0deg,
      rgba(0, 0, 0, 0.03) 0px,
      rgba(0, 0, 0, 0.03) 1px,
      transparent 1px,
      transparent 2px);
  z-index: 9999;
}

/* ------------------------------------------------------------------
   TYPOGRAPHY
   ------------------------------------------------------------------ */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-primary);
}

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.5rem;
}

h3 {
  font-size: 1.25rem;
}

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

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

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

code {
  font-family: var(--font-mono);
  background: var(--bg-tertiary);
  padding: 0.15em 0.4em;
  border-radius: 3px;
  font-size: 0.9em;
}

pre {
  background: var(--bg-secondary);
  padding: var(--space-md);
  border-radius: 4px;
  overflow-x: auto;
  border-left: 3px solid var(--accent-primary);
}

pre code {
  background: none;
  padding: 0;
}

/* ------------------------------------------------------------------
   LAYOUT
   ------------------------------------------------------------------ */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.main-content {
  padding: var(--space-xl) 0;
  min-height: calc(100vh - var(--header-height) - 100px);
}

/* ------------------------------------------------------------------
   HEADER
   ------------------------------------------------------------------ */
.site-header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--accent-primary);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.site-logo:hover {
  color: var(--accent-secondary);
  text-decoration: none;
  text-shadow: var(--shadow-glow);
}

.logo-symbol {
  font-size: 1.4rem;
  line-height: 1;
}

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

.nav-link {
  color: var(--text-secondary);
  font-size: 0.875rem;
  text-transform: lowercase;
  position: relative;
  padding: var(--space-xs) 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-primary);
  transition: width var(--transition-normal);
}

.nav-link:hover {
  color: var(--text-primary);
  text-decoration: none;
}

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

.nav-link.active {
  color: var(--accent-primary);
}

.nav-link.active::after {
  width: 100%;
}

/* ------------------------------------------------------------------
   POST LIST
   ------------------------------------------------------------------ */
.post-list {
  list-style: none;
}

.post-item {
  display: grid;
  grid-template-columns: 50px 1fr;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition-fast);
  animation: fadeInUp 0.4s ease backwards;
  /* Animation delay is set dynamically via --animation-index */
  animation-delay: calc(var(--animation-index, 0) * 0.05s);
}

.post-item:hover {
  background: var(--bg-hover);
  margin: 0 calc(var(--space-md) * -1);
  padding-left: var(--space-md);
  padding-right: var(--space-md);
}

.post-rank {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  padding-top: 2px;
}

.rank-number {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.upvote-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 1.2rem;
  line-height: 1;
  padding: 4px;
  transition: all var(--transition-fast);
}

.upvote-btn:hover {
  color: var(--accent-primary);
  transform: scale(1.2);
}

.upvote-btn.voted {
  color: var(--accent-primary);
}

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

.post-title {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
  line-height: 1.4;
}

.post-title:hover {
  color: var(--accent-secondary);
  text-decoration: none;
}

.post-domain {
  color: var(--text-muted);
  font-size: 0.75rem;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.post-meta span::after {
  content: '•';
  margin-left: var(--space-sm);
  color: var(--text-muted);
}

.post-meta span:last-child::after {
  content: '';
}

.post-meta a {
  color: var(--text-secondary);
}

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

/* ------------------------------------------------------------------
   SINGLE POST PAGE
   ------------------------------------------------------------------ */
.post-header {
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--border-color);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: var(--space-lg);
}

.back-link:hover {
  color: var(--accent-primary);
  text-decoration: none;
}

.post-page-title {
  font-size: 2rem;
  margin-bottom: var(--space-md);
  line-height: 1.2;
}

.post-page-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.post-body {
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  line-height: 1.8;
}

.post-body h2 {
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--border-color);
}

.post-body h3 {
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
}

.post-body p {
  margin-bottom: var(--space-lg);
}

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

.post-body li {
  margin-bottom: var(--space-sm);
}

.post-body blockquote {
  border-left: 3px solid var(--accent-primary);
  padding-left: var(--space-lg);
  margin: var(--space-lg) 0;
  color: var(--text-secondary);
  font-style: italic;
}

/* Post Body Images (for Markdown rendered images) */
.post-body img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: var(--space-lg) auto;
  border-radius: 4px;
  background: var(--bg-secondary);
}

/* Tables in Post Body (for Markdown rendered tables) */
.post-body table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-lg) 0;
  font-size: 0.9rem;
  overflow-x: auto;
  display: block;
}

.post-body th,
.post-body td {
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--border-color);
  text-align: left;
}

.post-body th {
  background: var(--bg-secondary);
  font-weight: 600;
  color: var(--text-primary);
}

.post-body tr:nth-child(even) {
  background: var(--bg-tertiary);
}

/* Post Images */
.post-image {
  margin: var(--space-xl) 0;
  border-radius: 4px;
  overflow: hidden;
  background: var(--bg-secondary);
}

.post-image img {
  width: 100%;
  height: auto;
  display: block;
}

.post-image figcaption {
  padding: var(--space-sm) var(--space-md);
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  text-align: center;
  border-top: 1px solid var(--border-color);
}

/* ------------------------------------------------------------------
   ABOUT PAGE
   ------------------------------------------------------------------ */
.about-content {
  display: grid;
  gap: var(--space-xl);
}

.ascii-art {
  font-family: 'Cascadia Mono', 'Consolas', 'DejaVu Sans Mono', monospace;
  font-size: 0.65rem;
  line-height: 1.15;
  color: var(--accent-primary);
  white-space: pre;
  overflow-x: auto;
  padding: var(--space-lg);
  background: var(--bg-secondary);
  border-radius: 4px;
  letter-spacing: 0;
}

.social-links {
  display: flex;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.social-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--text-primary);
  font-size: 0.875rem;
  transition: all var(--transition-fast);
}

.social-link:hover {
  border-color: var(--accent-primary);
  background: var(--accent-glow);
  text-decoration: none;
}

/* ------------------------------------------------------------------
   FOOTER
   ------------------------------------------------------------------ */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: var(--space-xl) 0;
  margin-top: auto;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer-text {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.footer-links {
  display: flex;
  gap: var(--space-md);
}

.footer-link {
  color: var(--text-secondary);
  font-size: 0.8rem;
}

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

/* ------------------------------------------------------------------
   ANIMATIONS
   ------------------------------------------------------------------ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {

  0%,
  100% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.1);
  }
}

.upvote-pulse {
  animation: pulse 0.3s ease;
}

/* ------------------------------------------------------------------
   RESPONSIVE
   ------------------------------------------------------------------ */
@media (max-width: 768px) {
  :root {
    --header-height: 56px;
  }

  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.25rem;
  }

  .header-inner {
    gap: var(--space-md);
  }

  .site-nav {
    gap: var(--space-md);
  }

  .nav-link {
    font-size: 0.8rem;
  }

  .post-item {
    grid-template-columns: 40px 1fr;
    gap: var(--space-sm);
  }

  .post-title {
    font-size: 1rem;
  }

  .post-page-title {
    font-size: 1.5rem;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .site-logo span:not(.logo-symbol) {
    display: none;
  }

  .post-meta span:not(:first-child):not(:last-child) {
    display: none;
  }
}

/* ------------------------------------------------------------------
   UTILITY CLASSES
   ------------------------------------------------------------------ */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-accent {
  color: var(--accent-primary);
}

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

.mt-lg {
  margin-top: var(--space-lg);
}

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