/* The Data Driven Marketer: one stylesheet for the whole site.
   Tokens first; light by default, dark through prefers-color-scheme. */
@font-face { font-family: 'Newsreader'; src: url('/assets/fonts/newsreader-var-latin.woff2') format('woff2'); font-weight: 200 800; font-style: normal; font-display: swap; }
@font-face { font-family: 'Newsreader'; src: url('/assets/fonts/newsreader-var-latin-italic.woff2') format('woff2'); font-weight: 200 800; font-style: italic; font-display: swap; }
@font-face { font-family: 'Plex Sans'; src: url('/assets/fonts/plex-sans-var-latin.woff2') format('woff2'); font-weight: 100 700; font-style: normal; font-display: swap; }

:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --surface-2: #f2f0ea;
  --ink: #1d1c1a;
  --ink-2: #4a4843;
  --ink-3: #7a776f;
  --line: #e4e1d8;
  --accent: #0f6e56;
  --accent-ink: #085041;
  --accent-soft: #e1f5ee;
  --serif: 'Newsreader', Georgia, 'Times New Roman', serif;
  --sans: 'Plex Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mono: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  --wrap: 1120px;
  --measure: 68ch;
  --r: 10px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #151614;
    --surface: #1c1d1b;
    --surface-2: #252623;
    --ink: #ecebe6;
    --ink-2: #c3c1b9;
    --ink-3: #8f8c84;
    --line: #2f302c;
    --accent: #5dcaa5;
    --accent-ink: #9fe1cb;
    --accent-soft: #10382d;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 24px; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 400 17px/1.65 var(--sans); }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--accent-ink); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 3px; }
h1, h2, h3, h4 { font-family: var(--serif); font-weight: 500; line-height: 1.2; letter-spacing: -0.01em; color: var(--ink); }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.sr-only, .skip:not(:focus) { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip:focus { position: absolute; top: 8px; left: 8px; background: var(--surface); padding: 8px 12px; z-index: 10; }
.meta { color: var(--ink-3); font-size: 14px; margin: 0; }
.meta a { color: inherit; }
.lede { color: var(--ink-2); font-size: 19px; margin: 0; max-width: 60ch; }

/* header and footer */
.site-head { border-bottom: 1px solid var(--line); }
.head-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 68px; }
.wordmark { font: 500 21px/1 var(--serif); color: var(--ink); text-decoration: none; letter-spacing: -0.01em; }
.wordmark span { color: var(--accent); }
.nav ul { display: flex; align-items: center; gap: 22px; list-style: none; margin: 0; padding: 0; }
.nav a { color: var(--ink-2); text-decoration: none; font-size: 15px; }
.nav a:hover, .nav a[aria-current] { color: var(--ink); }
.nav a[aria-current] { box-shadow: 0 2px 0 var(--accent); }
.nav-search { display: inline-flex; padding: 4px; }
.nav-toggle { display: none; font: inherit; font-size: 15px; background: none; border: 1px solid var(--line); color: var(--ink); border-radius: 99px; padding: 4px 14px; cursor: pointer; }
@media (max-width: 820px) {
  .nav-toggle { display: inline-block; }
  .nav ul { display: none; position: absolute; left: 0; right: 0; top: 68px; flex-direction: column; align-items: flex-start; gap: 0; background: var(--bg); border-bottom: 1px solid var(--line); padding: 8px 24px 16px; z-index: 5; }
  .nav.open ul { display: flex; }
  .nav li { width: 100%; }
  .nav a { display: block; padding: 10px 0; font-size: 17px; }
  .site-head { position: relative; }
}
.site-foot { border-top: 1px solid var(--line); margin-top: 96px; padding: 28px 0 40px; color: var(--ink-3); font-size: 14px; }
.foot-row { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; }
.foot-row p { margin: 0; }
.foot-row ul { display: flex; flex-wrap: wrap; gap: 18px; list-style: none; margin: 0; padding: 0; }
.foot-row a { color: var(--ink-3); text-decoration: none; }
.foot-row a:hover { color: var(--ink); }

/* home hero, list heads and chips */
.hero { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 32px; align-items: center; padding-top: 56px; padding-bottom: 32px; }
.hero h1 { font-size: clamp(36px, 5vw, 56px); margin: 0 0 12px; max-width: 16ch; }
.hero-photo img { width: 120px; height: 120px; border-radius: 50%; object-fit: cover; background: var(--accent-soft); }
@media (max-width: 640px) { .hero { grid-template-columns: 1fr; padding-top: 36px; } .hero-photo { display: none; } }
.list-head { padding: 48px 0 20px; }
.list-head h1 { font-size: clamp(32px, 4vw, 44px); margin: 0 0 8px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: 0 0 32px; }
.chips a { display: inline-block; padding: 4px 12px; border: 1px solid var(--line); border-radius: 99px; color: var(--ink-2); text-decoration: none; font-size: 14px; }
.chips a:hover { border-color: var(--ink-3); color: var(--ink); }
.chips a[aria-current] { background: var(--accent-soft); border-color: transparent; color: var(--accent-ink); }
.chips span { color: var(--ink-3); margin-left: 2px; }
.chips a[aria-current] span { color: inherit; }

/* cards */
.kicker { font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--accent); margin: 0 0 6px; }
.kicker a { color: inherit; text-decoration: none; }
.card { display: flex; flex-direction: column; gap: 12px; }
.card-img { display: block; aspect-ratio: 16 / 9; overflow: hidden; border-radius: var(--r); background: var(--surface-2); }
.card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s ease; }
.card:hover .card-img img { transform: scale(1.02); }
.card-title { font-size: 21px; margin: 0 0 8px; }
.card-title a { color: var(--ink); text-decoration: none; }
.card-title a:hover { color: var(--accent); }
.card-desc { color: var(--ink-2); margin: 0 0 10px; font-size: 16px; }
.card-big .card-title { font-size: clamp(26px, 3vw, 34px); }
.lead { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: 40px; padding-bottom: 40px; margin-bottom: 40px; border-bottom: 1px solid var(--line); }
.lead-side { display: grid; gap: 20px; align-content: start; }
.lead-side .card { flex-direction: row; gap: 16px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.lead-side .card:last-child { border-bottom: 0; padding-bottom: 0; }
.lead-side .card-img { flex: 0 0 112px; aspect-ratio: 1; }
.lead-side .card-title { font-size: 18px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 40px 32px; }
@media (max-width: 860px) { .lead { grid-template-columns: 1fr; } }
.pager { display: flex; justify-content: space-between; align-items: center; margin-top: 56px; padding-top: 20px; border-top: 1px solid var(--line); font-size: 15px; }
.pager a { text-decoration: none; }
.pager-n { color: var(--ink-3); }

/* post */
.post-head { max-width: calc(var(--measure) + 48px + 220px + 56px); padding-top: 40px; }
.crumb { font-size: 14px; margin: 0 0 16px; }
.crumb a { text-decoration: none; }
.post-head h1 { font-size: clamp(34px, 5vw, 52px); margin: 0 0 16px; max-width: 22ch; }
.post-hero { margin: 32px 0 0; }
.post-hero img { width: 100%; max-height: 560px; object-fit: cover; border-radius: var(--r); background: var(--surface-2); }
.post-grid { max-width: calc(var(--measure) + 48px + 220px + 56px); display: grid; grid-template-columns: minmax(0, var(--measure)) 220px; gap: 56px; justify-content: space-between; padding-top: 40px; }
.toc { position: sticky; top: 24px; align-self: start; font-size: 14px; max-height: calc(100vh - 48px); overflow: auto; }
.toc-label { color: var(--ink-3); margin: 0 0 10px; font-size: 13px; }
.toc ol { list-style: none; margin: 0; padding: 0 0 0 12px; border-left: 1px solid var(--line); }
.toc li { margin: 0 0 10px; line-height: 1.4; }
.toc a { color: var(--ink-2); text-decoration: none; }
.toc a:hover, .toc a.on { color: var(--accent); }
@media (max-width: 1000px) { .post-grid { grid-template-columns: minmax(0, 1fr); } .toc { display: none; } }
.post-foot { max-width: calc(var(--measure) + 48px + 220px + 56px); }
.author { display: flex; gap: 16px; align-items: center; max-width: var(--measure); margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--line); color: var(--ink-2); font-size: 15px; }
.author img { width: 56px; height: 56px; border-radius: 50%; object-fit: cover; flex: none; }
.author p { margin: 0; }
.next { margin-top: 72px; }
.next h2 { font-size: 28px; margin: 0 0 24px; }

/* the body of posts and pages */
.page-body { max-width: calc(var(--measure) + 48px); padding-top: 48px; }
.page-body h1 { font-size: clamp(34px, 5vw, 48px); margin: 0 0 24px; }
.prose { font-size: 18px; line-height: 1.75; color: var(--ink); overflow-wrap: break-word; }
.prose > :first-child { margin-top: 0; }
.prose p, .prose ul, .prose ol { margin: 0 0 1.25em; }
.prose h2 { font-size: 30px; margin: 2em 0 0.6em; }
.prose h3 { font-size: 23px; margin: 1.8em 0 0.5em; }
.prose h4, .prose h5 { font-size: 19px; margin: 1.6em 0 0.5em; }
.prose li { margin: 0 0 0.4em; }
.prose li > ul, .prose li > ol { margin: 0.4em 0 0; }
.prose strong { font-weight: 600; }
.prose blockquote { margin: 1.6em 0; padding: 2px 0 2px 20px; border-left: 3px solid var(--accent); font-family: var(--serif); font-size: 21px; line-height: 1.5; color: var(--ink); }
.prose blockquote p:last-child { margin-bottom: 0; }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 2.5em 0; }
.prose figure { margin: 2em 0; }
.prose figure img, .prose > p img { border-radius: 8px; margin: 0 auto; }
.prose figcaption { color: var(--ink-3); font-size: 14px; text-align: center; margin-top: 8px; }
.prose code { font-family: var(--mono); font-size: 0.86em; background: var(--surface-2); padding: 0.1em 0.35em; border-radius: 4px; }
.prose pre { background: var(--surface-2); padding: 16px 18px; border-radius: 8px; overflow-x: auto; font-size: 14px; line-height: 1.55; }
.prose pre code { background: none; padding: 0; font-size: inherit; }
.tbl { overflow-x: auto; margin: 1.8em 0; border: 1px solid var(--line); border-radius: 8px; }
.prose table { border-collapse: collapse; width: 100%; font-size: 15px; line-height: 1.5; }
.prose th, .prose td { text-align: left; vertical-align: top; padding: 10px 14px; border-bottom: 1px solid var(--line); }
.prose th { background: var(--surface-2); font-weight: 600; }
.prose tr:last-child td { border-bottom: 0; }
.gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 8px; margin: 2em 0; }
.gallery img { border-radius: 6px; aspect-ratio: 4 / 3; object-fit: cover; width: 100%; }

/* YouTube lite embed: a thumbnail until clicked (site.js) */
.yt { position: relative; aspect-ratio: 16 / 9; margin: 2em 0; border-radius: var(--r); overflow: hidden; background: #000 center / cover no-repeat; }
.yt a, .yt button { position: absolute; inset: 0; display: flex; align-items: flex-end; padding: 16px; color: #fff; text-decoration: none; font: 500 15px/1.3 var(--sans); background: linear-gradient(transparent 55%, rgba(0, 0, 0, .65)); border: 0; cursor: pointer; text-align: left; width: 100%; }
.yt a::before, .yt button::before { content: ''; position: absolute; left: 50%; top: 50%; width: 68px; height: 48px; margin: -24px 0 0 -34px; border-radius: 12px; background: rgba(0, 0, 0, .7) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M8 5v14l11-7z' fill='%23fff'/%3E%3C/svg%3E") center / 28px no-repeat; transition: background-color .2s; }
.yt:hover a::before, .yt:hover button::before { background-color: #c00; }
.yt iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }

/* buttons, search, 404 */
.btn { display: inline-block; padding: 10px 18px; border-radius: 99px; background: var(--accent); color: #fff; text-decoration: none; font-size: 15px; margin: 0 8px 8px 0; }
.btn:hover { color: #fff; background: var(--accent-ink); }
@media (prefers-color-scheme: dark) { .btn, .btn:hover { color: #0b2a22; } }
.btn-ghost { background: none; color: var(--ink); border: 1px solid var(--line); }
.btn-ghost:hover { background: var(--surface-2); color: var(--ink); }
.notfound { padding-top: 96px; }
.notfound .lede { margin-bottom: 28px; }
.search-form input { width: 100%; font: inherit; font-size: 20px; padding: 14px 18px; border: 1px solid var(--line); border-radius: var(--r); background: var(--surface); color: var(--ink); }
.search-form input:focus { outline: 2px solid var(--accent); outline-offset: 0; }
.search .meta { margin: 16px 0 8px; }
.search-results { list-style: none; padding: 0; margin: 0; }
.search-results li { padding: 18px 0; border-bottom: 1px solid var(--line); }
.search-results h2 { font-size: 21px; margin: 4px 0 6px; }
.search-results h2 a { color: var(--ink); text-decoration: none; }
.search-results h2 a:hover { color: var(--accent); }
.search-results p { margin: 0; color: var(--ink-2); font-size: 15px; }
mark { background: var(--accent-soft); color: inherit; padding: 0 1px; border-radius: 2px; }

/* /archive: every post, grouped by topic */
.archive-jump { display: flex; flex-wrap: wrap; gap: 8px; margin: 24px 0 8px; }
.archive-jump a { padding: 4px 12px; border: 1px solid var(--line); border-radius: 99px; color: var(--ink-2); text-decoration: none; font-size: 14px; }
.archive-jump span { color: var(--ink-3); }
.archive-group { margin-top: 40px; }
.archive-group h2 { font-size: 26px; margin: 0 0 12px; }
.archive-group h2 a { color: var(--ink); text-decoration: none; }
.archive-group ul { list-style: none; margin: 0; padding: 0; }
.archive-group li { display: flex; justify-content: space-between; gap: 16px; padding: 9px 0; border-bottom: 1px solid var(--line); font-size: 16px; }
.archive-group li a { color: var(--ink); text-decoration: none; }
.archive-group li a:hover { color: var(--accent); }
.archive-group time { color: var(--ink-3); font-size: 14px; white-space: nowrap; }
@media (max-width: 640px) { .archive-group li { flex-direction: column; gap: 2px; } }