/* ==========================================================================
   CATPPUCCIN MOCHA THEME
   ========================================================================== */

:root {
  --bg: #1e1e2e;
  --bg-subtle: #181825;
  --surface: #313244;
  --surface-hover: #45475a;
  --surface-active: #585b70;
  --border: #45475a;
  --border-hover: #585b70;
  --border-accent: #89b4fa;

  --text-main: #cdd6f4;
  --text-secondary: #a6adc8;
  --text-muted: #6c7086;
  
  --accent: #89b4fa;
  --accent-tech: #a6e3a1;
  --accent-dnd: #fab387;
  --accent-tag: #cba6f7;
  
  --code-bg: #181825;
  --code-border: #313244;
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", "JetBrains Mono", Menlo, Consolas, monospace;
  
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  
  --transition: 0.15s ease-in-out;
  --max-width: 860px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  background-color: var(--bg);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-tap-highlight-color: transparent;
  text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg);
  overflow-x: hidden;
}

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

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  display: block;
}

/* ==========================================================================
   LAYOUT & HEADER
   ========================================================================== */

.site-header {
  border-bottom: 1px solid var(--border);
  background-color: var(--bg-subtle);
  position: sticky;
  top: 0;
  z-index: 50;
  padding-top: env(safe-area-inset-top, 0px);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: nowrap;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.15rem;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-main);
  letter-spacing: -0.02em;
  padding: 0.25rem 0;
  flex-shrink: 0;
  white-space: nowrap;
}

.site-brand:hover {
  text-decoration: none;
}

.brand-name {
  color: var(--text-main);
}

.brand-divider {
  color: var(--text-secondary);
  font-weight: 400;
  margin: 0 0.15rem;
}

.brand-sub {
  color: var(--text-main);
  font-weight: 700;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-width: 0;
  flex-wrap: nowrap;
}

.site-nav-links {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-width: 0;
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.site-nav-links::-webkit-scrollbar {
  display: none;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
  flex-wrap: nowrap;
}

.nav-link {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition);
  white-space: nowrap;
}

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

.nav-link.active {
  font-weight: 600;
}

.nav-github-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: color var(--transition), transform var(--transition);
  padding: 0.35rem;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.nav-github-link:hover {
  color: var(--text-main);
  text-decoration: none;
  transform: translateY(-1px);
}

.search-trigger-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  cursor: pointer;
  font-family: inherit;
  transition: all var(--transition);
  user-select: none;
  flex-shrink: 0;
}

.search-trigger-btn:hover {
  background: var(--surface-hover);
  border-color: var(--border-hover);
  color: var(--text-main);
}

.search-trigger-btn:active {
  background: var(--surface-active);
}

.search-btn-label {
  display: inline;
}

.kbd-shortcut {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
  color: var(--text-secondary);
}

.site-main {
  flex: 1;
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 1.5rem;
  padding-bottom: max(2rem, env(safe-area-inset-bottom, 0px));
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.85rem;
  background-color: var(--bg-subtle);
}

/* ==========================================================================
   HOMEPAGE & SECTIONS
   ========================================================================== */

.hero-section {
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2.5rem;
}

.hero-title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
  color: var(--text-main);
  line-height: 1.25;
}

.hero-subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
  line-height: 1.5;
}

.collections-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
  gap: 1.25rem;
  margin-bottom: 3rem;
}

.collection-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition: border-color var(--transition), background-color var(--transition);
  display: flex;
  flex-direction: column;
}

.collection-card:hover {
  background: var(--surface-hover);
  border-color: var(--border-hover);
  text-decoration: none;
}

.collection-card:active {
  background: var(--surface-active);
}

.collection-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.collection-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-main);
}

.collection-count {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 0.15rem 0.5rem;
  border-radius: 12px;
  flex-shrink: 0;
}

.collection-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1rem;
  flex: 1;
  line-height: 1.5;
}

.collection-link-text {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--accent);
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.section-title {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text-main);
}

.section-more-link {
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 500;
  transition: color var(--transition);
  flex-shrink: 0;
}

.section-more-link:hover {
  text-decoration: underline;
}

.recent-posts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.recent-post-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  aspect-ratio: 1 / 1;
  transition: background-color var(--transition), border-color var(--transition);
}

.recent-post-card:hover {
  background: var(--surface-hover);
  border-color: var(--border-hover);
  text-decoration: none;
}

.recent-post-card:active {
  background: var(--surface-active);
}

.recent-post-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.6rem;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.recent-post-date {
  font-family: var(--font-mono);
}

.recent-post-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.35;
  margin-bottom: 0.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.recent-post-summary {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.45;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.recent-post-footer {
  margin-top: 0.75rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.75rem;
  color: var(--text-secondary);
  display: flex;
  justify-content: flex-end;
}

.posts-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.post-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  transition: all var(--transition);
  display: block;
}

.post-item:hover {
  background: var(--surface-hover);
  border-color: var(--border-hover);
  text-decoration: none;
}

.post-item:active {
  background: var(--surface-active);
}

.post-item-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
  flex-wrap: wrap;
}

.collection-badge {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: capitalize;
  letter-spacing: 0.03em;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--accent);
  display: inline-flex;
  align-items: center;
}

.badge-tech {
  color: var(--accent-tech);
  border-color: rgba(166, 227, 161, 0.2);
}

.badge-dnd {
  color: var(--accent-dnd);
  border-color: rgba(250, 179, 135, 0.2);
}

.post-item-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.35rem;
  line-height: 1.35;
}

.post-item-summary {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ==========================================================================
   ARTICLE / SINGLE PAGE PROSE
   ========================================================================== */

.article-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.article-title {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.25;
  margin-bottom: 0.75rem;
  color: var(--text-main);
  overflow-wrap: break-word;
  word-break: break-word;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.article-content {
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--text-main);
  overflow-wrap: break-word;
  word-break: break-word;
}

.article-content > * + * {
  margin-top: 1.5rem;
}

.article-content h1,
.article-content h2,
.article-content h3,
.article-content h4 {
  color: var(--text-main);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-top: 2.25rem;
  margin-bottom: 0.75rem;
  overflow-wrap: break-word;
  word-break: break-word;
}

.article-content h2 { font-size: 1.5rem; border-bottom: 1px solid var(--border); padding-bottom: 0.4rem; }
.article-content h3 { font-size: 1.25rem; }
.article-content h4 { font-size: 1.1rem; }

.article-content p {
  color: var(--text-main);
}

.article-content ul,
.article-content ol {
  padding-left: 1.5rem;
  color: var(--text-main);
}

.article-content li {
  margin-bottom: 0.35rem;
}

.article-content blockquote {
  border-left: 3px solid var(--border-hover);
  padding: 0.5rem 0 0.5rem 1.25rem;
  color: var(--text-secondary);
  font-style: italic;
  background: var(--surface);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.95rem;
  display: block;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.article-content th,
.article-content td {
  border: 1px solid var(--border);
  padding: 0.6rem 0.9rem;
  text-align: left;
  white-space: nowrap;
}

.article-content th {
  background: var(--surface);
  font-weight: 600;
  color: var(--text-main);
}

.article-content tr:nth-child(even) {
  background: var(--bg-subtle);
}

.article-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2.5rem 0;
}

.article-content code:not(pre code) {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 0.15rem 0.4rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.88em;
  color: var(--accent-tag);
  word-break: break-all;
}

.highlight, pre {
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-md);
}


/* ==========================================================================
   SEARCH MODAL & SEARCH PAGE
   ========================================================================== */

.search-modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding-top: 10vh;
  z-index: 100;
}

.search-modal-backdrop.open {
  display: flex;
}

.search-container {
  background: var(--bg-subtle);
  border: 1px solid var(--border-hover);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 640px;
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.5);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  max-height: 75vh;
}

.search-input-wrapper {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid var(--border);
}

.search-icon {
  color: var(--text-secondary);
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.search-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-main);
  font-size: 1rem;
  font-family: inherit;
  min-width: 0;
}

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

.search-modal-close-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.25rem 0.55rem;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 500;
  transition: all var(--transition);
  touch-action: manipulation;
  flex-shrink: 0;
  user-select: none;
  line-height: 1.2;
}

.search-modal-close-btn:hover {
  background: var(--surface-hover);
  border-color: var(--border-hover);
  color: var(--text-main);
}

.search-modal-close-btn:active {
  background: var(--surface-active);
}

.desktop-esc-hint {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-secondary);
  display: inline-block;
}

.mobile-close-hint {
  display: none;
}

.search-filter-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  white-space: nowrap;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.search-filter-bar::-webkit-scrollbar {
  display: none;
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1.2;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-family: inherit;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  flex-shrink: 0;
  user-select: none;
  touch-action: manipulation;
  appearance: none;
  -webkit-appearance: none;
}

.filter-btn:hover {
  background: var(--surface-hover);
  color: var(--text-main);
}

.filter-btn:active {
  background: var(--surface-active);
}

.filter-btn.active {
  background: var(--surface-active);
  border-color: var(--accent);
  color: var(--text-main);
  font-weight: 600;
}

.search-results-list {
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 0.5rem;
  list-style: none;
  flex: 1;
}

.search-result-item {
  display: block;
  padding: 0.8rem 1rem;
  border-radius: var(--radius-md);
  transition: background-color var(--transition);
}

.search-result-item:hover,
.search-result-item:active,
.search-result-item.selected {
  background: var(--surface);
  text-decoration: none;
}

.search-result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.25rem;
}

.search-result-title {
  color: var(--text-main);
  font-weight: 600;
  font-size: 0.98rem;
  overflow-wrap: break-word;
  word-break: break-word;
}

.search-result-snippet {
  color: var(--text-secondary);
  font-size: 0.85rem;
  line-height: 1.45;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

mark.search-highlight {
  background: rgba(137, 180, 250, 0.25);
  color: #89dceb;
  padding: 0.05rem 0.2rem;
  border-radius: 2px;
  font-weight: 600;
}

.search-empty {
  padding: 2.5rem 1rem;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.search-footer {
  padding: 0.6rem 1.25rem;
  border-top: 1px solid var(--border);
  font-size: 0.75rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--surface);
  flex-shrink: 0;
}

.search-shortcuts {
  display: flex;
  gap: 0.75rem;
}

.search-footer-info {
  font-size: 0.75rem;
}

/* ==========================================================================
   RESPONSIVE DESIGN
   ========================================================================== */

@media (max-width: 768px) {
  .site-main {
    padding: 2rem 1.25rem;
  }

  .recent-posts-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .nav-container {
    padding: 0.75rem 1rem;
    gap: 0.5rem;
    flex-wrap: nowrap;
  }

  .site-brand {
    font-size: 1rem;
  }

  .site-nav {
    gap: 0.5rem;
    flex: 1;
    justify-content: flex-end;
  }

  .site-nav-links {
    gap: 0.65rem;
  }

  .nav-link {
    font-size: 0.88rem;
  }

  .nav-actions {
    gap: 0.35rem;
    flex-shrink: 0;
  }

  .search-btn-label {
    display: none;
  }

  .search-trigger-btn {
    padding: 0.4rem 0.55rem;
    gap: 0;
  }

  .search-trigger-btn .kbd-shortcut {
    display: none;
  }

  .nav-github-link {
    padding: 0.3rem;
  }

  .site-main {
    padding: 1.5rem 1rem;
  }

  .hero-section {
    margin-bottom: 1.75rem;
    padding-bottom: 1.5rem;
  }

  .hero-title {
    font-size: 1.6rem;
  }

  .hero-subtitle {
    font-size: 0.98rem;
  }

  .collections-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-bottom: 2.25rem;
  }

  .collection-card {
    padding: 1.25rem;
  }

  .recent-posts-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .recent-post-card {
    aspect-ratio: auto;
    min-height: auto;
    padding: 1.15rem;
  }

  .recent-post-title {
    font-size: 1.05rem;
  }

  .recent-post-summary {
    -webkit-line-clamp: 3;
  }

  .post-item {
    padding: 1rem 1.15rem;
  }

  .post-item-title {
    font-size: 1.05rem;
  }

  .post-item-meta {
    flex-wrap: wrap;
    gap: 0.4rem 0.6rem;
    font-size: 0.78rem;
  }

  /* Single Article on Mobile */
  .article-header {
    margin-bottom: 1.75rem;
    padding-bottom: 1.25rem;
  }

  .article-title {
    font-size: 1.65rem;
    line-height: 1.3;
  }

  .article-meta {
    gap: 0.5rem 0.75rem;
    font-size: 0.8rem;
  }

  .article-content {
    font-size: 0.98rem;
    line-height: 1.7;
  }

  .article-content h2 {
    font-size: 1.3rem;
    margin-top: 1.75rem;
  }

  .article-content h3 {
    font-size: 1.15rem;
    margin-top: 1.5rem;
  }

  .article-content blockquote {
    padding: 0.5rem 0 0.5rem 1rem;
  }


  /* Search Modal on Mobile */
  .search-modal-backdrop {
    padding-top: 0;
    align-items: stretch;
  }

  .search-container {
    max-width: 100%;
    width: 100%;
    height: 100%;
    max-height: 100vh;
    max-height: 100dvh;
    border-radius: 0;
    border: none;
    margin: 0;
  }

  .search-input-wrapper {
    padding: 0.75rem 1rem;
    padding-top: max(0.75rem, env(safe-area-inset-top, 0px));
    gap: 0.6rem;
  }

  .search-input {
    font-size: 1rem; /* 16px prevents iOS Safari auto zoom */
  }

  .desktop-esc-hint {
    display: none;
  }

  .mobile-close-hint {
    display: inline-block;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
  }

  .search-modal-close-btn {
    padding: 0.35rem 0.65rem;
    border-radius: var(--radius-sm);
    background: var(--surface);
    border: 1px solid var(--border);
  }

  .search-filter-bar {
    padding: 0.5rem 1rem;
  }

  .search-results-list {
    padding: 0.35rem;
  }

  .search-result-item {
    padding: 0.75rem 0.85rem;
  }

  /* Hide entire bottom shortcuts footer on mobile */
  .search-footer {
    display: none;
  }

  /* Site Footer on Mobile */
  .site-footer {
    padding: 1.75rem 1rem;
    padding-bottom: max(1.75rem, env(safe-area-inset-bottom, 0px));
  }
}