/* Public portal: the editorial magazine side. Tokens come from tokens.css. */

body { font-size: 17px; line-height: 1.6; --max: 1240px; }
.writeup-page { font-size: 18px; line-height: 1.7; }

/* ---------------------------------------------------------------- header */
.site-header { border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 40px; padding-top: 18px; padding-bottom: 18px; }
.brand { display: flex; align-items: center; min-height: 44px; color: var(--ink); text-decoration: none; font-family: var(--serif); font-size: 30px; line-height: 1; }
.brand:hover { color: var(--ink); }
.site-nav { display: flex; flex-wrap: wrap; gap: 4px 28px; flex: 1 1 auto; font-size: 14px; font-weight: 600; font-stretch: 112%; }
.site-nav a { display: flex; align-items: center; min-height: 44px; color: var(--ink-2); text-decoration: none; border-bottom: 2px solid transparent; }
.site-nav a:hover { color: var(--ink); }
.site-nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--em); }
.header-tools { display: flex; gap: 10px; align-items: center; margin-left: auto; }
.theme-btn {
  min-width: 44px; min-height: 44px; padding: 0 12px;
  background: transparent; color: var(--ink-2); border: 1px solid var(--line); border-radius: var(--radius);
  font-family: var(--mono); font-size: 12px; cursor: pointer;
}
.theme-btn:hover { color: var(--ink); border-color: var(--ink-3); }
.resume-btn { padding: 0 18px; }
@media (max-width: 640px) {
  .site-header .wrap { gap: 4px 16px; }
  .brand { flex: 1; }
  .site-nav { order: 3; flex-basis: 100%; gap: 0 22px; }
}

/* ---------------------------------------------------------------- shared */
.section-title { margin: 0; font-size: 44px; line-height: 1; font-weight: 800; font-stretch: 120%; letter-spacing: -0.01em; }
.section-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-end; gap: 16px; margin-bottom: 32px; }
.section-head p { margin: 0; }
.section-note { margin: 0; font-family: var(--serif); font-style: italic; font-size: 20px; color: var(--ink-3); }
.rule-b { border-bottom: 1px solid var(--line); }
@media (max-width: 640px) { .section-title { font-size: 34px; } }

/* ---------------------------------------------------------------- hero */
.hero .wrap { padding-top: 96px; padding-bottom: 80px; }
.hero .kicker { margin-bottom: 22px; }
.hero h1 { margin: 0; font-family: var(--serif); font-weight: 400; font-size: clamp(52px, 8vw, 116px); line-height: 0.95; letter-spacing: -0.015em; max-width: 13ch; }
.hero-intro { margin: 32px 0 0; max-width: 58ch; font-size: 19px; color: var(--ink-2); }
.hero-status { margin-top: 40px; padding-top: 22px; border-top: 1px solid var(--line); max-width: 760px; display: flex; flex-wrap: wrap; gap: 12px 32px; align-items: center; font-family: var(--mono); font-size: 13px; }
.hero-status .studying { display: flex; align-items: center; gap: 10px; color: var(--ink); }
.hero-status .count { color: var(--ink-3); }
@media (max-width: 640px) { .hero .wrap { padding-top: 56px; padding-bottom: 56px; } .hero-intro { font-size: 17px; } }

/* ---------------------------------------------------------------- write-ups list */
.writeups .wrap { padding-top: 80px; padding-bottom: 80px; }
.posts { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.posts > li { border-bottom: 1px solid var(--line); }
.post-link { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr)); gap: 12px 48px; padding: 30px 0; color: var(--ink); text-decoration: none; }
.post-link:hover { color: var(--ink); }
.post-link:hover .post-title { color: var(--em); }
.post-head { display: flex; gap: 24px; align-items: baseline; }
.post-n { font-family: var(--mono); font-size: 13px; color: var(--em); }
.post-title { font-family: var(--serif); font-size: 36px; line-height: 1.05; }
.post-learned { display: block; color: var(--ink-2); }
.post-tools { display: block; margin-top: 10px; font-family: var(--mono); font-size: 12px; color: var(--ink-3); }
.posts > li.next { padding: 26px 0; display: flex; gap: 24px; align-items: baseline; color: var(--ink-3); border-bottom-style: dashed; }
.posts > li.next .post-n { color: var(--ink-3); }
.posts > li.next .serif { font-style: italic; font-size: 28px; line-height: 1.15; }
@media (max-width: 640px) { .post-title { font-size: 30px; } .writeups .wrap { padding-top: 56px; padding-bottom: 56px; } }

/* ---------------------------------------------------------------- architecture */
.architecture { background: var(--lake); border-bottom: 1px solid var(--line); }
.architecture .wrap { padding-top: 80px; padding-bottom: 88px; }
.architecture .section-head { margin-bottom: 44px; }
.arch-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.arch { min-width: 900px; display: flex; align-items: center; }
.box { padding: 16px 18px; border: 1px solid var(--line-3); background: var(--bg); flex: none; }
.box b { display: block; font-weight: 700; font-stretch: 112%; }
.box span, .box.up-stream { font-family: var(--mono); font-size: 12px; color: var(--ink-2); }
.box.up-stream { border-style: dashed; background: transparent; font-size: 13px; }
.box.primary { border-color: var(--em); }
.link-line { width: 40px; height: 1px; background: var(--line-3); flex: none; }
.arch-nodes { list-style: none; margin: 0; padding: 0 0 0 22px; border-left: 1px solid var(--line-3); display: grid; gap: 10px; }
.arch-nodes li { display: grid; grid-template-columns: 130px 1fr; gap: 12px; align-items: baseline; }
.arch-nodes b { font-weight: 700; font-stretch: 112%; }
.arch-nodes span { font-family: var(--mono); font-size: 12px; color: var(--ink-2); }
.toolbelt { margin: 40px 0 0; font-family: var(--mono); font-size: 13px; line-height: 1.9; color: var(--ink-2); }
@media (max-width: 760px) {
  .arch { min-width: 0; flex-direction: column; align-items: stretch; }
  .link-line { width: 1px; height: 18px; margin-left: 24px; }
  .arch-nodes { padding: 14px 0 0 18px; }
  .arch-nodes li { grid-template-columns: 1fr; gap: 0; }
  .architecture .wrap { padding-top: 56px; padding-bottom: 64px; }
}

/* ---------------------------------------------------------------- about + footer */
.about-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(340px, 100%), 1fr)); gap: 48px 80px; padding-top: 88px; padding-bottom: 72px; }
.about-grid h2 { margin: 0; font-family: var(--serif); font-weight: 400; font-size: 56px; line-height: 1; }
.about-links { margin-top: 32px; display: flex; flex-wrap: wrap; gap: 12px; }
.facts { margin: 0; display: grid; grid-template-columns: 120px 1fr; gap: 16px 20px; border-top: 1px solid var(--line); padding-top: 20px; }
.facts dt { font-family: var(--mono); font-size: 12px; color: var(--ink-3); padding-top: 4px; }
.facts dd { margin: 0; }
@media (max-width: 480px) { .facts { grid-template-columns: 1fr; gap: 2px; } .facts dd { margin-bottom: 12px; } .about-grid h2 { font-size: 44px; } }

.site-footer { border-top: 1px solid var(--line); }
.site-footer .wrap { padding-top: 24px; padding-bottom: 40px; display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 12px; font-family: var(--mono); font-size: 12px; color: var(--ink-3); }
/* The hidden entrance: a 7px diamond that reads as decoration (DESIGN.md §6.4). */
.mark { display: inline-flex; align-items: center; justify-content: center; width: 44px; height: 44px; margin-right: -10px; text-decoration: none; }
.mark span { width: 7px; height: 7px; background: var(--line); transform: rotate(45deg); }

/* ---------------------------------------------------------------- write-up page */
.wu-head { padding-top: 72px; padding-bottom: 56px; border-bottom: 1px solid var(--line); }
.crumb { margin: 0 0 20px; font-family: var(--mono); font-size: 12px; letter-spacing: 0.08em; color: var(--em); }
.crumb a { color: var(--ink-3); text-decoration: none; }
.crumb a:hover { color: var(--ink); }
.wu-head h1 { margin: 0; font-family: var(--serif); font-weight: 400; font-size: clamp(48px, 7vw, 96px); line-height: 0.98; max-width: 14ch; }
.deck { margin: 28px 0 0; max-width: 56ch; font-size: 20px; color: var(--ink-2); }
.wu-tools { margin: 28px 0 0; font-family: var(--mono); font-size: 12px; color: var(--ink-3); }
.wu-body { display: flex; flex-wrap: wrap; gap: 56px 80px; padding-top: 56px; padding-bottom: 88px; }
.wu-main { flex: 999 1 560px; min-width: 0; max-width: 68ch; }
.wu-main h2 { margin: 0 0 12px; font-size: 14px; font-weight: 700; font-stretch: 118%; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-3); }
.wu-main p { margin: 0 0 24px; }
.wu-main .section { margin-bottom: 40px; }
.wu-main .section p:last-child { margin-bottom: 0; }
.figure { margin: 0 0 40px; padding: 24px; border: 1px solid var(--line); background: var(--lake); }
.flow { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; font-family: var(--mono); font-size: 13px; }
.flow .step { padding: 10px 14px; border: 1px solid var(--line-3); background: var(--bg); }
.flow .step.up-stream { border-style: dashed; background: transparent; color: var(--ink-2); }
.flow .step.primary { border-color: var(--em); }
.flow .arrow { color: var(--ink-3); }
.figure figcaption { margin-top: 16px; font-family: var(--mono); font-size: 12px; color: var(--ink-3); }
.wu-side { flex: 1 1 300px; min-width: 0; }
.wu-side .inner { border-top: 2px solid var(--em); padding-top: 18px; }
.wu-side h2 { margin: 0 0 16px; font-family: var(--serif); font-weight: 400; font-size: 32px; line-height: 1.1; }
.taught { margin: 0; padding: 0; list-style: none; font-size: 16px; line-height: 1.5; }
.taught li { display: grid; grid-template-columns: 32px 1fr; padding: 12px 0; border-top: 1px solid var(--line); }
.taught li:last-child { border-bottom: 1px solid var(--line); }
.taught .k { font-family: var(--mono); font-size: 12px; color: var(--em); padding-top: 3px; }
.at-work { margin: 28px 0 0; font-family: var(--mono); font-size: 12px; color: var(--ink-3); line-height: 1.8; }
.at-work span { display: block; font-family: var(--sans); font-size: 15px; color: var(--ink-2); }
.wu-nav { border-top: 1px solid var(--line); }
.wu-nav .wrap { padding-top: 32px; padding-bottom: 32px; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; }
.wu-nav a { display: inline-flex; flex-direction: column; justify-content: center; min-height: 44px; color: var(--ink); text-decoration: none; }
.wu-nav .all { font-family: var(--mono); font-size: 13px; color: var(--ink-2); }
.wu-nav .next { align-items: flex-end; text-align: right; }
.wu-nav .next .meta { font-size: 12px; }
.wu-nav .next .serif { font-size: 26px; line-height: 1.15; }
.wu-nav a:hover .serif { color: var(--em); }
@media (max-width: 640px) { .wu-head { padding-top: 48px; padding-bottom: 40px; } .deck { font-size: 18px; } .writeup-page { font-size: 17px; } }

/* ---------------------------------------------------------------- 404 */
.lost { padding-top: 120px; padding-bottom: 120px; }
.lost h1 { margin: 16px 0 24px; font-family: var(--serif); font-weight: 400; font-size: clamp(48px, 7vw, 88px); line-height: 1; }