@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg: #fafafa;
  --fg: #111111;
  --muted: #666666;
  --faint: #999999;
  --border: #e2e8f0;
  --border-toggle: #cbd5e1;
  --accent: #0070f3;
  --accent-light: #e6f2ff;
  --mono: 'JetBrains Mono', monospace;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --row-hover: #f1f5f9;
  --surface: #ffffff;
  --line: #e2e8f0;
  --line-2: #cbd5e1;
  --accent-soft: #e6f2ff;
}

[data-theme="dark"] {
  --bg: #090c10;
  --fg: #f0f6fc;
  --muted: #8b949e;
  --faint: #484f58;
  --border: #21262d;
  --border-toggle: #21262d;
  --accent: #58a6ff;
  --accent-light: #161b22;
  --row-hover: #161b22;
  --surface: #0d1117;
  --line: #21262d;
  --line-2: #30363d;
  --accent-soft: #161b22;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.25s ease, color 0.25s ease;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.15s ease;
}

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

.wrapper {
  max-width: 640px;
  margin: 0 auto;
  padding: 80px 24px;
}

/* --- Header --- */
.header {
  margin-bottom: 50px;
}

.header-main {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.title-area h1 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.subtitle {
  font-size: 14px;
  color: var(--muted);
  font-weight: 500;
  margin-top: 2px;
}

.theme-toggle {
  background: none;
  border: 1px solid var(--border-toggle);
  color: var(--muted);
  width: 36px;
  height: 36px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.15s ease, color 0.15s ease;
}

.theme-toggle:hover {
  border-color: var(--muted);
  color: var(--fg);
}

.theme-toggle svg {
  width: 16px;
  height: 16px;
}

.i-sun { display: none; }
[data-theme="dark"] .i-moon { display: none; }
[data-theme="dark"] .i-sun { display: block; }

.bio {
  font-size: 14.5px;
  color: var(--muted);
  margin-bottom: 24px;
}

.links {
  display: flex;
  gap: 24px;
  align-items: center;
}

.links a {
  color: var(--muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: color 0.15s ease;
}

.links a:hover {
  color: var(--fg);
}

.links svg {
  width: 24px;
  height: 24px;
}

/* --- Sections --- */
.section {
  margin-bottom: 48px;
}

.section-title {
  font-size: 12px;
  font-family: var(--mono);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--faint);
  margin-bottom: 16px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}

/* --- Row List (Writing) --- */
.row-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.list-row {
  display: flex;
  align-items: center;
  padding: 6px 8px;
  margin: 0 -8px;
  border-radius: 6px;
  font-size: 14px;
}

.list-row:hover {
  background-color: var(--row-hover);
  color: var(--fg);
}

.row-meta {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--faint);
  width: 110px;
  flex-shrink: 0;
}

.row-name {
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* --- Projects List --- */
.projects-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.project-item {
  display: flex;
  flex-direction: column;
}

.project-header {
  display: flex;
  align-items: baseline;
  font-size: 14px;
}

.project-name {
  font-weight: 600;
  flex-shrink: 0;
}

.project-dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background-color: var(--faint);
  margin: 0 10px;
  flex-shrink: 0;
  align-self: center;
}

.project-desc {
  color: var(--muted);
  font-size: 13.5px;
}

/* --- Git Heatmap --- */
.heatmap-wrapper {
  overflow-x: auto;
  padding: 4px 0;
  width: 100%;
}

.heatmap-grid {
  display: grid;
  grid-template-rows: repeat(7, 9px);
  grid-auto-flow: column;
  gap: 2px;
  width: max-content;
}

.heatmap-sq {
  width: 9px;
  height: 9px;
  border-radius: 1.5px;
  background-color: var(--border);
  transition: transform 0.1s ease;
}

.heatmap-sq:hover {
  transform: scale(1.3);
  box-shadow: 0 0 4px rgba(0,0,0,0.15);
  z-index: 10;
}

/* Light mode colors */
.heatmap-sq.level-0 { background-color: var(--border); }
.heatmap-sq.level-1 { background-color: #9be9a8; }
.heatmap-sq.level-2 { background-color: #40c463; }
.heatmap-sq.level-3 { background-color: #216e39; }

/* Dark mode colors overrides */
[data-theme="dark"] .heatmap-sq.level-1 { background-color: #0e4429; }
[data-theme="dark"] .heatmap-sq.level-2 { background-color: #006d32; }
[data-theme="dark"] .heatmap-sq.level-3 { background-color: #26a641; }

.loading-shimmer, .empty-state {
  font-size: 13px;
  color: var(--muted);
  font-style: italic;
}

/* --- Footer --- */
.footer {
  margin-top: 60px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  font-size: 12.5px;
  color: var(--faint);
}

@media (max-width: 540px) {
  .wrapper {
    padding: 40px 16px;
  }
  .list-row {
    flex-direction: column;
    align-items: flex-start;
    padding: 8px;
  }
  .row-meta {
    margin-bottom: 2px;
  }
  .project-header {
    flex-direction: column;
    align-items: flex-start;
  }
  .project-dot {
    display: none;
  }
  .project-desc {
    margin-top: 2px;
  }
}

/* --- Article Header Container --- */
.header-container {
  max-width: 640px;
  margin: 0 auto;
  padding: 80px 24px 0 24px;
}

.brand {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--fg);
  display: block;
}

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

/* --- Article Content (Prose) --- */
.prose {
  max-width: 640px;
  margin: 0 auto;
  padding: 40px 24px 80px 24px;
}

.prose article {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.prose h1 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin-bottom: 4px;
}

.prose .meta {
  font-size: 13px;
  font-family: var(--mono);
  color: var(--muted);
  margin-bottom: 12px;
}

.prose h2 {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-top: 36px;
  margin-bottom: 4px;
}

.prose h3 {
  font-size: 15px;
  font-weight: 600;
  margin-top: 24px;
  margin-bottom: 4px;
}

.prose p {
  font-size: 14.5px;
  color: var(--fg);
  line-height: 1.6;
}

/* Code styling */
.prose code {
  font-family: var(--mono);
  font-size: 13px;
  background-color: var(--row-hover);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--fg);
}

.prose pre {
  background-color: var(--row-hover);
  border: 1px solid var(--border);
  padding: 16px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 16px 0;
  scrollbar-width: thin;
  scrollbar-color: var(--border-toggle) transparent;
}

.prose pre::-webkit-scrollbar {
  height: 5px;
}

.prose pre::-webkit-scrollbar-track {
  background: transparent;
}

.prose pre::-webkit-scrollbar-thumb {
  background: var(--border-toggle);
  border-radius: 4px;
}

.prose pre::-webkit-scrollbar-thumb:hover {
  background: var(--muted);
}

.prose pre code {
  background-color: transparent;
  padding: 0;
  border-radius: 0;
  font-size: 13px;
  line-height: 1.5;
}

/* Lists */
.prose ul, .prose ol {
  padding-left: 20px;
  font-size: 14.5px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 8px;
}

.prose li {
  line-height: 1.6;
}

/* Tables */
.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 13.5px;
}

.prose th, .prose td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  text-align: left;
}

.prose th {
  font-weight: 600;
  color: var(--muted);
}

.prose hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 32px 0;
}

.prose blockquote {
  border-left: 3px solid var(--border);
  padding-left: 16px;
  margin: 20px 0;
  color: var(--muted);
  font-style: italic;
}

/* Note Callouts */
.prose .note {
  padding: 12px 16px;
  background-color: var(--row-hover);
  border-left: 3px solid var(--accent);
  border-radius: 4px;
  margin: 20px 0;
  font-size: 13.5px;
  color: var(--muted);
}

/* --- Diagrams --- */
.diagram {
  margin: 32px 0;
  background: var(--row-hover);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  display: flex;
  justify-content: center;
}

.diagram svg {
  max-width: 100%;
  height: auto;
}

.d-accent {
  fill: var(--accent-light);
  stroke: var(--accent);
  stroke-width: 1.5;
}

.d-box {
  fill: var(--bg);
  stroke: var(--border);
  stroke-width: 1.5;
}

.d-line {
  stroke: var(--border);
  stroke-width: 2;
  stroke-dasharray: 4;
}

.d-arrow {
  fill: var(--border);
}

.d-title {
  fill: var(--fg);
  font-family: var(--sans);
  font-weight: 600;
}

.d-sub {
  fill: var(--muted);
  font-family: var(--sans);
}

.d-badge {
  fill: var(--accent);
  font-family: var(--mono);
  font-weight: 500;
}

.d-cap {
  fill: var(--faint);
  font-family: var(--sans);
}

/* Footer link in prose */
.prose .foot {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.prose .foot a {
  color: var(--muted);
  font-size: 14px;
}

.prose .foot a:hover {
  color: var(--fg);
}

/* --- Syntax Highlighting (Highlight.js) --- */
.hljs-comment,
.hljs-quote {
  color: var(--faint);
  font-style: italic;
}

.hljs-keyword,
.hljs-selector-tag,
.hljs-addition {
  color: var(--accent);
  font-weight: 500;
}

.hljs-number,
.hljs-string,
.hljs-meta,
.hljs-symbol,
.hljs-bullet,
.hljs-attr {
  color: #22863a;
}
[data-theme="dark"] .hljs-number,
[data-theme="dark"] .hljs-string,
[data-theme="dark"] .hljs-meta,
[data-theme="dark"] .hljs-symbol,
[data-theme="dark"] .hljs-bullet,
[data-theme="dark"] .hljs-attr {
  color: #85e89d;
}

.hljs-title,
.hljs-section,
.hljs-name,
.hljs-selector-id,
.hljs-selector-class {
  color: var(--fg);
  font-weight: 500;
}

.hljs-variable,
.hljs-template-variable {
  color: var(--fg);
}

.hljs-type,
.hljs-builtin-name,
.hljs-built_in,
.hljs-selector-attr,
.hljs-selector-pseudo,
.hljs-literal {
  color: var(--accent);
}