/* ========================================================================
   Stelfox Dark Theme - Minimal dark-first design
   ======================================================================== */

/* === Color Scheme === */
:root {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;

  --text-primary: #c9d1d9;
  --text-secondary: #8b949e;
  --text-tertiary: #6e7681;

  --accent-primary: #58a6ff;
  --accent-hover: #79c0ff;

  --border-color: #30363d;
  --code-bg: #161b22;

  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif;
  --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;

  --max-width: 1200px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
}

/* === Reset & Base === */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* === Typography === */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
  color: var(--text-primary);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.1rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.9rem; }

p {
  margin-bottom: var(--spacing-sm);
}

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

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

strong {
  font-weight: 600;
}

em {
  font-style: italic;
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background-color: var(--code-bg);
  padding: 0.2em 0.4em;
  border-radius: 3px;
}

pre {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: var(--spacing-sm);
  overflow-x: auto;
  margin-bottom: var(--spacing-sm);
}

pre code {
  background-color: transparent;
  padding: 0;
  font-size: 0.875rem;
}

blockquote {
  border-left: 4px solid var(--border-color);
  padding-left: var(--spacing-sm);
  margin: var(--spacing-sm) 0;
  color: var(--text-secondary);
  font-style: italic;
}

hr {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: var(--spacing-lg) 0;
}

/* === Layout === */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
  width: 100%;
}

main {
  flex: 1;
  padding: var(--spacing-lg) 0;
}

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

.site-header .container {
  max-width: var(--max-width);
}

.header-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.site-title {
  font-size: 1.25rem;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--text-primary);
  white-space: nowrap;
}

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

.header-right {
  display: flex;
  gap: var(--spacing-md);
  margin-left: auto;
  align-items: center;
}

.main-nav {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.main-nav a {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--accent-primary);
  text-decoration: none;
}

/* === Header Search === */
.header-search-input,
input.header-search-input,
input[type="text"].header-search-input {
  background-color: #161b22 !important;
  border: 1px solid #30363d !important;
  color: #c9d1d9 !important;
  padding: 0.4rem 0.6rem !important;
  font-size: 0.9rem !important;
  width: 150px !important;
  border-radius: 6px !important;
  font-family: var(--font-sans) !important;
  box-sizing: border-box !important;
  -webkit-appearance: none !important;
  -moz-appearance: none !important;
  appearance: none !important;
  flex-shrink: 0 !important;
}

.header-search-input:focus {
  outline: 2px solid #58a6ff;
  outline-offset: 2px;
  border-color: #58a6ff;
  width: 250px;
  transition: width 0.2s;
}

/* === Footer === */
.site-footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-lg) 0;
  margin-top: var(--spacing-xl);
  color: var(--text-secondary);
  font-size: 0.9rem;
  text-align: center;
}

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

.social-links a {
  color: var(--text-secondary);
}

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

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

/* === Random Quotes === */
.random-quote {
  margin: var(--spacing-lg) 0;
  padding: 0 10%;
  text-align: center;
}

.random-quote-text {
  font-style: italic;
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.6;
  margin: 0;
  padding: 0;
  border: none;
}

.random-quote-attribution {
  display: block;
  margin-top: var(--spacing-xs);
  font-size: 0.85rem;
  color: var(--text-tertiary);
  font-style: normal;
  text-align: right;
}

.site-footer .random-quote {
  margin: 0 0 var(--spacing-sm) 0;
  padding: 0;
}

.site-footer .random-quote-text,
.site-footer .random-quote-attribution {
  display: inline;
}

.site-footer .random-quote-text::after {
  content: " ";
}

.site-footer .random-quote-attribution {
  text-align: center;
}

/* === Breadcrumbs === */
.breadcrumbs {
  margin-bottom: var(--spacing-sm);
}

.breadcrumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  font-size: 0.85rem;
  color: var(--text-tertiary);
}

.breadcrumbs li {
  display: flex;
  align-items: center;
}

.breadcrumbs li:not(:last-child)::after {
  content: "/";
  margin: 0 0.5em;
  color: var(--text-tertiary);
}

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

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

.breadcrumbs [aria-current="page"] {
  color: var(--text-secondary);
}

/* === Content === */
.content {
  margin-bottom: var(--spacing-xl);
}

.content-header {
  margin-bottom: var(--spacing-lg);
}

.content-header h1 {
  margin-top: 0;
  margin-bottom: var(--spacing-xs);
}

.content-meta {
  display: flex;
  gap: var(--spacing-md);
  color: var(--text-secondary);
  font-size: 0.9rem;
  flex-wrap: wrap;
  align-items: center;
}

.content-author {
  font-weight: 500;
}

.content-meta time {
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.reading-time {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-tertiary);
}

.tags {
  display: flex;
  gap: var(--spacing-xs);
  flex-wrap: wrap;
}

.tag {
  background-color: var(--bg-tertiary);
  padding: 0.2em 0.6em;
  border-radius: 3px;
  border: 1px solid var(--border-color);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.content-body {
  line-height: 1.7;
}

.content-body img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: var(--spacing-md) 0;
  border-radius: 6px;
}

.content-body ul,
.content-body ol {
  margin-left: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

.content-body li {
  margin-bottom: var(--spacing-xs);
}

.content-nav {
  display: flex;
  justify-content: space-between;
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-color);
  gap: var(--spacing-sm);
}

.content-nav a {
  flex: 1;
  padding: var(--spacing-sm);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  text-decoration: none;
  transition: background-color 0.2s;
}

.content-nav a:hover {
  background-color: var(--bg-tertiary);
}

.content-nav .next {
  text-align: right;
}

/* === Related Content === */
.related-content {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-color);
}

.related-content h3 {
  margin-top: 0;
  margin-bottom: var(--spacing-sm);
  font-size: 1rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.related-content ul {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.related-content li {
  display: list-item;
}

.related-content a {
  color: var(--accent-primary);
}

.related-content a:hover {
  color: var(--accent-hover);
}

.related-meta {
  margin-left: var(--spacing-xs);
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

.related-section {
  background-color: var(--bg-tertiary);
  padding: 0.1em 0.5em;
  border-radius: 3px;
}

.related-score {
  margin-left: 0.25em;
}

/* === Home Page === */
.home-intro {
  margin-bottom: var(--spacing-xl);
}

.home-intro h1 {
  margin-top: 0;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: var(--spacing-md);
}

/* === Latest Card === */
.latest-highlight {
  margin-bottom: var(--spacing-xl);
}

.latest-highlight h2 {
  margin-top: 0;
  margin-bottom: var(--spacing-md);
  font-size: 1.25rem;
  color: var(--text-secondary);
}

.latest-card {
  height: auto;
}

.latest-card .discover-card-excerpt {
  -webkit-line-clamp: unset;
}

.recent-posts h2 {
  margin-top: 0;
  margin-bottom: var(--spacing-md);
}

/* === Post Lists === */
.post-list {
  list-style: none;
  margin: 0;
}

.post-item {
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  align-items: baseline;
}

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

.post-date {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-tertiary);
  flex-shrink: 0;
  min-width: 6rem;
}

.post-link {
  flex: 1;
  display: flex;
  gap: var(--spacing-sm);
  align-items: baseline;
  flex-wrap: wrap;
}

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

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

.post-tags {
  display: flex;
  gap: 0.35em;
  flex-wrap: wrap;
  align-items: baseline;
}

.tag-project {
  background-color: transparent;
  color: var(--accent-primary);
  border: 1px solid var(--accent-primary);
}

/* === Discover Cards === */
.discover-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: var(--spacing-md);
  transition: all 0.2s;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  text-decoration: none;
  color: inherit;
  height: 100%;
}

.discover-card:hover {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 1px var(--accent-primary);
  transform: translateY(-2px);
  text-decoration: none;
  color: inherit;
}

.discover-card-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
  line-height: 1.3;
}

.discover-card:hover .discover-card-title {
  color: var(--accent-primary);
}

.discover-card-excerpt {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.discover-card-tags {
  display: flex;
  gap: var(--spacing-xs);
  flex-wrap: wrap;
}

.discover-card-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.discover-card-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

.discover-card-meta .reading-time {
  font-size: 0.8rem;
}

/* === Tables === */
table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-sm) 0;
}

th, td {
  padding: var(--spacing-xs) var(--spacing-sm);
  text-align: left;
  border: 1px solid var(--border-color);
}

th {
  background-color: var(--bg-secondary);
  font-weight: 600;
}

tr:nth-child(even) {
  background-color: var(--bg-secondary);
}

/* === Responsive === */
@media (max-width: 768px) {
  html {
    font-size: 15px;
  }

  .header-content {
    flex-direction: column;
    align-items: flex-start;
  }

  .header-right {
    width: 100%;
    flex-wrap: wrap;
  }

  .main-nav {
    flex-wrap: wrap;
    gap: var(--spacing-sm);
  }

  .main-nav a {
    white-space: nowrap;
  }

  .header-search-input,
  input.header-search-input,
  input[type="text"].header-search-input {
    width: 100% !important;
    padding: 0.75rem 1rem !important;
    font-size: 1rem !important;
    background-color: var(--bg-secondary) !important;
    border: 1px solid var(--border-color) !important;
    color: var(--text-primary) !important;
    flex-shrink: 1 !important;
  }

  .header-search-input:focus {
    width: 100%;
    border-color: var(--accent-primary);
    outline-color: var(--accent-primary);
  }

  .post-item {
    flex-direction: column;
    gap: var(--spacing-xs);
  }

  .post-date {
    min-width: auto;
  }

  .content-nav {
    flex-direction: column;
  }

  .content-nav .next {
    text-align: left;
  }

  .related-meta {
    display: block;
    margin-left: 0;
  }

  .random-quote {
    display: none;
  }
}

/* === YouTube Embed === */
.content-body .youtube-embed {
  display: block;
  margin: var(--spacing-md) 0;
  border-radius: 6px;
  overflow: hidden;
}

.content-body .youtube-embed iframe {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: none;
}

/* === Syntax Highlighting Override === */
.highlight {
  margin-bottom: var(--spacing-sm);
}

.highlight pre {
  margin: 0;
}

.highlight .lntable {
  width: 100%;
  border: none;
  border-collapse: collapse;
  margin: 0;
  padding: 0;
}

.highlight .lntable tr {
  background-color: transparent;
}

.highlight .lntable td {
  border: none;
  padding: 0;
}

.highlight .lntable .lntd:first-child {
  width: 1%;
  min-width: fit-content;
  user-select: none;
  vertical-align: top;
}

.highlight .lntable .lntd:first-child pre {
  text-align: right;
  border: none;
  background: transparent;
  padding: var(--spacing-sm) var(--spacing-sm) var(--spacing-sm) var(--spacing-sm);
  border-right: 1px solid var(--border-color);
}

.highlight .lntable .lntd:last-child {
  vertical-align: top;
}

.highlight .lntable .lntd:last-child pre {
  border: none;
  padding: var(--spacing-sm) var(--spacing-sm) var(--spacing-sm) var(--spacing-sm);
}

.highlight .lnlinks {
  color: var(--text-tertiary);
  text-decoration: none;
}

.highlight .lnlinks:hover {
  color: var(--text-secondary);
  text-decoration: none;
}