:root {
  --bg-primary: #121214;
  --bg-secondary: #18181c;
  --bg-tertiary: #202024;
  --bg-card: #1e1e22;
  --bg-card-hover: #26262c;

  --accent-primary: #a855f7;
  --accent-primary-rgb: 168, 85, 247;
  --accent-secondary: #00e89d;
  --accent-secondary-rgb: 0, 232, 157;
  --accent-tertiary: #fbbf24;

  --text-primary: #ffffff;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;

  --border-subtle: #27272a;
  --border-default: #3f3f46;

  --shadow-card: 4px 4px 0px #000000;
  --shadow-card-hover: 6px 6px 0px #000000;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);

  --max-width: 780px;
}

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

html {
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--accent-primary) transparent;
}

html::-webkit-scrollbar { width: 10px; }
html::-webkit-scrollbar-track { background: var(--bg-primary); }
html::-webkit-scrollbar-thumb {
  background: var(--accent-primary);
  border-radius: var(--radius-sm);
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

/* --- Header / Navbar --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 0 24px;
  border-bottom: 2px solid var(--border-subtle);
  background: rgba(18, 18, 20, 0.92);
  backdrop-filter: blur(8px);
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 72px;
}

.brand {
  font-family: 'Press Start 2P', monospace;
  font-size: 12px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand::before {
  content: 'AF';
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--accent-primary);
  border: 2px solid #000;
  box-shadow: 2px 2px 0px #000;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  color: #fff;
}

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

.site-header nav { display: flex; gap: 8px; align-items: center; }

.site-header nav a {
  font-family: 'Press Start 2P', monospace;
  font-size: 9px;
  color: var(--text-secondary);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  transition: all var(--transition-fast);
}

.site-header nav a:hover {
  color: var(--accent-secondary);
  background: rgba(0, 232, 157, 0.05);
  border-color: var(--accent-secondary);
}

/* --- Main --- */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 56px 24px 80px;
}

.list-title {
  font-family: 'Press Start 2P', monospace;
  font-size: clamp(16px, 3vw, 22px);
  line-height: 1.5;
  margin-bottom: 32px;
  color: var(--text-primary);
}

/* --- Folder tree --- */
.tree {
  list-style: none;
  padding: 0;
  margin: 0;
}

.tree .tree {
  margin: 12px 0 4px 18px;
  padding-left: 14px;
  border-left: 2px dashed var(--border-default);
}

.tree-folder { margin-bottom: 10px; }

.tree-folder > details > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-card);
  border: 2px solid var(--border-default);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 14px 18px;
  transition: all var(--transition-fast);
  user-select: none;
}

.tree-folder > details > summary::-webkit-details-marker { display: none; }

.tree-folder > details > summary::before {
  content: '▸';
  color: var(--accent-primary);
  font-size: 14px;
  transition: transform var(--transition-fast);
  display: inline-block;
  width: 12px;
}

.tree-folder > details[open] > summary::before {
  transform: rotate(90deg);
}

.tree-folder > details > summary:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-card-hover);
  transform: translate(-2px, -2px);
}

.tree-label {
  flex: 1;
  font-family: 'Press Start 2P', monospace;
  font-size: 10px;
  line-height: 1.7;
  color: var(--text-primary);
}

.tree-count {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--accent-secondary);
  background: rgba(0, 232, 157, 0.08);
  border: 2px solid var(--accent-secondary);
  border-radius: var(--radius-sm);
  padding: 2px 8px;
}

.tree-folder > details[open] > summary {
  border-color: var(--accent-primary);
}

.tree-file {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  background: var(--bg-card);
  border: 2px solid var(--border-default);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 14px 18px;
  margin-bottom: 10px;
  transition: all var(--transition-fast);
}

.tree-file:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-card-hover);
  transform: translate(-2px, -2px);
}

.tree-file a {
  font-family: 'Press Start 2P', monospace;
  font-size: 9px;
  line-height: 1.8;
  color: var(--text-primary);
  flex: 1;
}

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

.tree-file time {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
}

.section-intro { margin-bottom: 24px; color: var(--text-secondary); }

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

.post-list li {
  background: var(--bg-card);
  border: 2px solid var(--border-default);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 18px 20px;
  margin-bottom: 16px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  transition: all var(--transition-fast);
}

.post-list li:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-card-hover);
  transform: translate(-2px, -2px);
}

.post-list a {
  font-family: 'Press Start 2P', monospace;
  font-size: 10px;
  line-height: 1.7;
  color: var(--text-primary);
  flex: 1;
}

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

.post-list time {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
}

/* --- Post navigation --- */
.post-nav {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.post-nav-back {
  align-self: flex-start;
  font-family: 'Press Start 2P', monospace;
  font-size: 9px;
  line-height: 1.8;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 2px solid var(--border-default);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 12px 16px;
  transition: all var(--transition-fast);
}

.post-nav-back:hover {
  color: var(--accent-secondary);
  border-color: var(--accent-secondary);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-card-hover);
  transform: translate(-2px, -2px);
}

.post-nav-pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.post-nav-prev,
.post-nav-next {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: var(--bg-card);
  border: 2px solid var(--border-default);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 14px 18px;
  transition: all var(--transition-fast);
  min-width: 0;
}

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

.post-nav-prev:hover,
.post-nav-next:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-card-hover);
  transform: translate(-2px, -2px);
}

.post-nav-dir {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--accent-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.post-nav-name {
  font-family: 'Press Start 2P', monospace;
  font-size: 9px;
  line-height: 1.8;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.post-nav-empty { display: block; }

@media (max-width: 640px) {
  .post-nav-pager { grid-template-columns: 1fr; }
  .post-nav-next { text-align: left; }
}

/* --- Single post --- */
.post {
  background: var(--bg-card);
  border: 2px solid var(--border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 40px 36px;
}

.post h1 {
  font-family: 'Press Start 2P', monospace;
  font-size: clamp(16px, 3vw, 24px);
  line-height: 1.6;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.post > time {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.post-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0;
  margin: 12px 0 28px;
}

.post-tags li a {
  font-family: 'Press Start 2P', monospace;
  font-size: 8px;
  color: var(--accent-secondary);
  background: rgba(0, 232, 157, 0.08);
  border: 2px solid var(--accent-secondary);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  transition: all var(--transition-fast);
}

.post-tags li a:hover {
  background: var(--accent-secondary);
  color: var(--bg-primary);
}

/* --- Typographic content --- */
.post h2 {
  font-family: 'Press Start 2P', monospace;
  font-size: clamp(12px, 2vw, 16px);
  line-height: 1.7;
  margin: 36px 0 14px;
  color: var(--accent-primary);
}

.post h3 {
  font-family: 'Press Start 2P', monospace;
  font-size: 11px;
  line-height: 1.8;
  margin: 28px 0 12px;
  color: var(--accent-tertiary);
}

.post p { margin-bottom: 18px; }

.post ul, .post ol { margin: 0 0 18px 24px; }
.post li { margin-bottom: 8px; }

.post img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  border: 2px solid var(--border-default);
  margin: 8px 0;
}

.broken-link {
  color: #ef4444;
  border-bottom: 2px dotted #ef4444;
}

hr {
  border: none;
  border-top: 2px solid var(--border-subtle);
  margin: 32px 0;
}

/* --- Code --- */
code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.88em;
}

:not(pre) > code {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  padding: 2px 6px;
  color: var(--accent-secondary);
}

pre {
  background: #0d0d0f;
  border: 2px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 18px;
  overflow-x: auto;
  margin-bottom: 20px;
}

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

blockquote {
  margin: 24px 0;
  padding: 14px 20px;
  background: var(--bg-tertiary);
  border-left: 4px solid var(--accent-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-secondary);
}

blockquote p:last-child { margin-bottom: 0; }

/* --- Tables --- */
table {
  border-collapse: collapse;
  width: 100%;
  margin-bottom: 24px;
  font-size: 0.92rem;
}

th, td {
  border: 2px solid var(--border-default);
  padding: 10px 14px;
  text-align: left;
}

th {
  background: var(--bg-tertiary);
  font-family: 'Press Start 2P', monospace;
  font-size: 9px;
  color: var(--accent-secondary);
}

/* --- Footer --- */
.site-footer {
  border-top: 2px solid var(--border-subtle);
  padding: 28px 24px;
  text-align: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--text-muted);
}

/* --- Responsive --- */
@media (max-width: 640px) {
  .site-header { padding: 0 16px; height: 64px; }
  .brand { font-size: 10px; }
  .site-header nav a { font-size: 8px; padding: 6px 8px; }
  main { padding: 32px 16px 56px; }
  .post { padding: 24px 20px; }
  .post-list li { flex-direction: column; gap: 8px; }
}