:root {
  --bg: #fafaf7;
  --surface: #ffffff;
  --border: #e7e5e0;
  --border-strong: #d4d2cd;
  --text: #18181b;
  --text-soft: #52525b;
  --text-muted: #71717a;
  --accent: #0d9488;
  --accent-soft: #ccfbf1;
  --icon-bg: #f1efea;
  --icon-fg: #18181b;
  --code-bg: #1c1c1f;
  --code-fg: #e4e4e7;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.06);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 18px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

img { max-width: 100%; height: auto; display: block; }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px max(80px, calc((100vw - 1680px) / 2));
  border-bottom: 1px solid var(--border);
  background: rgba(250, 250, 247, 0.85);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: saturate(180%) blur(8px);
  -webkit-backdrop-filter: saturate(180%) blur(8px);
}
@media (max-width: 900px) {
  .site-header { padding-left: 32px; padding-right: 32px; }
}

.site-title {
  font-weight: 700;
  font-size: 20px;
  color: var(--text);
  letter-spacing: -0.015em;
}
.site-title:hover { text-decoration: none; color: var(--accent); }

.link-back, .link-github {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-soft);
  font-size: 14px;
  font-weight: 500;
}
.link-back:hover, .link-github:hover { color: var(--accent); text-decoration: none; }
.link-back svg, .link-github svg { width: 18px; height: 18px; }

.home {
  max-width: 1840px;
  margin: 0 auto;
  padding: 88px clamp(32px, 5vw, 80px) 120px;
}

.hero { margin-bottom: 72px; max-width: 880px; }
.hero h1 {
  font-size: 64px;
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: -0.025em;
  margin: 0 0 20px;
}
.lede {
  font-size: 22px;
  color: var(--text-soft);
  margin: 0;
  line-height: 1.55;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 360px));
  justify-content: center;
  gap: 24px;
}

.card {
  display: flex;
  flex-direction: column;
  padding: 28px 26px;
  min-height: 240px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  color: var(--text);
  transition: border-color 0.15s, box-shadow 0.15s, transform 0.15s;
}
.card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  text-decoration: none;
}

.card-icon {
  display: flex;
  align-items: center;
  color: var(--icon-fg);
  margin-bottom: 20px;
}
.card-icon svg { width: 32px; height: 32px; }

.card h2 {
  font-size: 20px;
  font-weight: 600;
  margin: 0 0 10px;
  letter-spacing: -0.015em;
  line-height: 1.25;
}
.card p {
  color: var(--text-soft);
  font-size: 15px;
  margin: 0 0 16px;
  line-height: 1.55;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
}
.card-tags span {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 3px 8px;
  border-radius: 999px;
  font-family: var(--font-mono);
  text-transform: lowercase;
}

.article {
  display: grid;
  grid-template-columns:
    [full-start] minmax(32px, 1fr)
    [main-start] min(820px, 100% - 64px) [main-end]
    minmax(32px, 1fr) [full-end];
  row-gap: 0;
  padding: 80px 0 120px;
  max-width: 1600px;
  margin: 0 auto;
}
.article > * { grid-column: main; }
.article > .prose { grid-column: full; display: contents; }
.prose > * { grid-column: main; }
.prose > .figure,
.prose > .figure-grid {
  grid-column: full;
  justify-self: center;
  width: min(1280px, 100% - 64px);
}

.article h1 {
  font-size: 44px;
  line-height: 1.15;
  font-weight: 700;
  letter-spacing: -0.025em;
  margin: 0 0 24px;
}

.parent-link {
  font-size: 13px;
  color: var(--text-muted);
  margin: 0 0 12px;
}
.parent-link a {
  color: var(--text-soft);
  border-bottom: 1px dashed var(--border-strong);
}
.parent-link a:hover { text-decoration: none; color: var(--accent); border-color: var(--accent); }

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 40px;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  transition: border-color 0.15s, color 0.15s;
}
.pill:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }
.pill svg { width: 14px; height: 14px; opacity: 0.75; }
.pill .ext { width: 12px; height: 12px; }

.prose { color: var(--text); }
.prose h2 {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 48px 0 16px;
}
.prose h3 {
  font-size: 17px;
  font-weight: 600;
  margin: 36px 0 12px;
  color: var(--text);
}
.prose p { margin: 0 0 16px; }
.prose ul, .prose ol { padding-left: 24px; margin: 0 0 16px; }
.prose li { margin: 6px 0; }
.prose code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: 4px;
}
.prose pre {
  background: var(--code-bg);
  color: var(--code-fg);
  padding: 16px 20px;
  border-radius: var(--radius);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.55;
  margin: 16px 0;
}
.prose pre code { background: none; border: none; padding: 0; color: inherit; }
.prose strong { font-weight: 600; }

.prose .read-more {
  margin: 32px 0 0;
  font-size: 16px;
}
.prose .read-more a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
  color: var(--accent);
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}
.prose .read-more a:hover {
  border-color: currentColor;
  text-decoration: none;
}

.figure { margin: 28px 0; }
.figure img {
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
}
.figure figcaption {
  margin-top: 10px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.5;
  text-align: center;
}

.figure-grid {
  display: grid;
  gap: 12px;
  margin: 28px 0;
}
.figure-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.figure-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.figure-grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
.figure-grid figure { margin: 0; display: flex; flex-direction: column; gap: 8px; }
.figure-grid figure img { border-radius: var(--radius); border: 1px solid var(--border); background: var(--surface); }
.figure-grid figcaption {
  font-size: 12px;
  color: var(--text-muted);
  text-align: center;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 48px 32px;
  text-align: center;
  color: var(--text-muted);
  font-size: 15px;
}
.site-footer a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-soft);
}
.site-footer a:hover { color: var(--accent); text-decoration: none; }
.site-footer svg { width: 16px; height: 16px; }

/* --- Magazine layout (prototype, AAE only) --- */
.article.magazine {
  display: block;
  grid-template-columns: none;
  max-width: 1500px;
  margin: 0 auto;
  padding: 72px clamp(32px, 4vw, 72px) 120px;
}
.article.magazine > *,
.article.magazine .prose > * {
  grid-column: auto;
}
.article.magazine > .prose {
  display: block;
}
.article.magazine .prose > .figure,
.article.magazine .prose > .figure-grid {
  justify-self: auto;
  width: auto;
  max-width: none;
}

.article.magazine h1 {
  font-size: 56px;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin: 0 0 18px;
  max-width: 1100px;
}
.article.magazine .meta { margin-bottom: 56px; }

.article.magazine .prose > p,
.article.magazine .prose > ul,
.article.magazine .prose > ol,
.article.magazine .prose > pre,
.article.magazine .prose > h2,
.article.magazine .prose > h3 {
  max-width: 760px;
}

.article.magazine .split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 56px;
  align-items: start;
  margin: 64px 0;
}
.article.magazine .split > * { max-width: none; }
.article.magazine .split-text > :first-child { margin-top: 0; }
.article.magazine .split-text .cite {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.5;
}
.article.magazine .split-figure { margin: 0; }

/* Multi-column flow variant */
.article.magazine.multicolumn .prose {
  columns: 2;
  column-gap: 56px;
  column-rule: 1px solid var(--border);
}
.article.magazine.multicolumn .prose > * { max-width: none; }
.article.magazine.multicolumn .prose > p,
.article.magazine.multicolumn .prose > ul,
.article.magazine.multicolumn .prose > ol { text-align: justify; hyphens: auto; }
.article.magazine.multicolumn .prose > h2,
.article.magazine.multicolumn .prose > h3 { break-after: avoid; }
.article.magazine.multicolumn .prose > .figure,
.article.magazine.multicolumn .prose > pre,
.article.magazine.multicolumn .prose > ul,
.article.magazine.multicolumn .prose > ol { break-inside: avoid; }
.article.magazine.multicolumn .prose > .figure {
  margin: 16px 0 24px;
  max-width: 100%;
  text-align: center;
}
.article.magazine.multicolumn .prose > .figure img {
  max-width: 100%;
  width: auto;
  margin: 0 auto;
}

/* Wide elements break out to span both columns */
.article.magazine.multicolumn .prose > .split,
.article.magazine.multicolumn .prose > .figure-grid {
  column-span: all;
  margin: 32px 0;
}

@media (max-width: 900px) {
  .article.magazine.multicolumn .prose { columns: 1; column-rule: none; }
}
.article.magazine .split-figure img {
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  width: 100%;
}
.article.magazine .split-figure figcaption {
  margin-top: 10px;
  font-size: 14px;
  color: var(--text-muted);
  text-align: left;
  line-height: 1.5;
}

.article.magazine .prose > .figure-grid {
  margin: 48px 0;
}

.article.magazine .prose > .figure {
  margin: 40px auto;
  max-width: 1200px;
}
.article.magazine .prose > .figure figcaption {
  text-align: left;
  max-width: 800px;
}

@media (max-width: 900px) {
  .article.magazine .split {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .article.magazine h1 { font-size: 38px; }
}

@media (max-width: 640px) {
  .site-header { padding: 14px 20px; }
  .home { padding: 48px 20px 72px; }
  .article { padding-top: 40px; padding-bottom: 72px; }
  .hero { margin-bottom: 56px; }
  .hero h1 { font-size: 40px; }
  .lede { font-size: 18px; }
  .article h1 { font-size: 30px; }
  .card { padding: 28px 24px; min-height: 0; }
  .figure-grid.cols-3,
  .figure-grid.cols-4 { grid-template-columns: repeat(2, 1fr); }
}