:root {
  --about-bg: #04100b;
  --about-panel: rgba(9, 27, 17, 0.88);
  --about-panel-strong: #0a1d13;
  --about-ink: #eef2e8;
  --about-muted: #aeb9ad;
  --about-lime: #c7ef68;
  --about-mint: #59d8b2;
  --about-line: rgba(197, 231, 119, 0.22);
  --about-serif: "Iowan Old Style", Baskerville, "Palatino Linotype", Georgia, serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body.about-body {
  margin: 0;
  color: var(--about-ink);
  background:
    linear-gradient(rgba(2, 10, 7, 0.78), rgba(2, 10, 7, 0.96)),
    url("assets/solarpunk/scene-day.webp?v=2") center top / cover fixed,
    var(--about-bg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.about-body::selection { color: #07110c; background: var(--about-lime); }

.about-skip {
  position: fixed;
  z-index: 100;
  top: 10px;
  left: 10px;
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--about-lime);
  color: #07110c;
  font-weight: 800;
  text-decoration: none;
  transform: translateY(-170%);
}

.about-skip:focus { transform: translateY(0); }

.about-header,
.about-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 5vw, 72px);
  border-color: var(--about-line);
  background: rgba(3, 13, 9, 0.9);
  backdrop-filter: blur(18px);
}

.about-header {
  position: sticky;
  z-index: 30;
  top: 0;
  border-bottom: 1px solid var(--about-line);
}

.about-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--about-ink);
  font-weight: 800;
  text-decoration: none;
}

.about-brand svg {
  width: 32px;
  height: 36px;
  fill: none;
  stroke: var(--about-lime);
  stroke-width: 1.5;
}

.about-header nav,
.about-footer nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 22px;
}

.about-header nav a,
.about-footer nav a {
  color: #d5ddd2;
  font-size: 0.82rem;
  font-weight: 700;
  text-decoration: none;
}

.about-header nav a:hover,
.about-header nav a[aria-current="page"],
.about-footer nav a:hover { color: var(--about-lime); }

.about-main { overflow: hidden; }

.about-hero,
.blog-hero {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: clamp(76px, 12vw, 150px) 0 clamp(64px, 9vw, 110px);
}

.about-kicker,
.section-kicker,
.article-kicker {
  margin: 0 0 14px;
  color: var(--about-lime);
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.about-hero h1,
.blog-hero h1,
.post-header h1 {
  max-width: 1000px;
  margin: 0;
  font-family: var(--about-serif);
  font-size: clamp(3.2rem, 8vw, 7.4rem);
  font-weight: 560;
  letter-spacing: -0.055em;
  line-height: 0.93;
  text-wrap: balance;
}

.about-hero .lede,
.blog-hero .lede,
.post-deck {
  max-width: 760px;
  margin: 28px 0 0;
  color: #c4cec2;
  font-size: clamp(1.08rem, 2vw, 1.35rem);
  line-height: 1.68;
  text-wrap: balance;
}

.about-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }

.about-button {
  display: inline-flex;
  align-items: center;
  min-height: 46px;
  padding: 0 18px;
  border: 1px solid var(--about-line);
  border-radius: 2px 15px 2px 15px;
  color: var(--about-ink);
  font-size: 0.82rem;
  font-weight: 800;
  text-decoration: none;
}

.about-button.primary { border-color: var(--about-lime); background: var(--about-lime); color: #07110c; }
.about-button:hover { transform: translateY(-1px); }

.about-band {
  padding: clamp(62px, 9vw, 110px) max(20px, calc((100% - 1180px) / 2));
  border-top: 1px solid var(--about-line);
  background: rgba(3, 13, 9, 0.82);
}

.about-band.alt { background: rgba(9, 27, 17, 0.94); }

.about-band h2,
.post-content h2 {
  margin: 0 0 24px;
  font-family: var(--about-serif);
  font-size: clamp(2.2rem, 5vw, 4.5rem);
  font-weight: 560;
  letter-spacing: -0.045em;
  line-height: 1;
  text-wrap: balance;
}

.about-band > p,
.about-copy p,
.about-copy li {
  max-width: 780px;
  color: var(--about-muted);
  font-size: 1rem;
  line-height: 1.78;
}

.principle-grid,
.blog-grid,
.facts-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 34px;
}

.principle-card,
.blog-card,
.fact-card,
.editor-note,
.article-callout {
  border: 1px solid var(--about-line);
  border-radius: 3px 24px 3px 24px;
  background: linear-gradient(145deg, rgba(12, 35, 22, 0.95), rgba(4, 16, 10, 0.98));
  box-shadow: 0 22px 56px rgba(0, 0, 0, 0.22);
}

.principle-card,
.fact-card { padding: 26px; }
.principle-card h3,
.fact-card strong { color: #f0f3e9; font-family: var(--about-serif); font-size: 1.35rem; }
.principle-card p,
.fact-card span { display: block; margin: 10px 0 0; color: var(--about-muted); font-size: 0.9rem; line-height: 1.65; }

.blog-card { display: flex; min-height: 290px; padding: 28px; flex-direction: column; }
.blog-card .post-type { color: var(--about-mint); font-size: 0.7rem; font-weight: 850; letter-spacing: 0.13em; text-transform: uppercase; }
.blog-card h3 { margin: 38px 0 14px; font-family: var(--about-serif); font-size: clamp(1.55rem, 3vw, 2.2rem); font-weight: 560; line-height: 1.06; }
.blog-card p { margin: 0; color: var(--about-muted); font-size: 0.9rem; line-height: 1.65; }
.blog-card footer { display: flex; justify-content: space-between; gap: 12px; margin-top: auto; padding-top: 24px; color: #89978b; font-size: 0.72rem; }
.blog-card a { color: var(--about-lime); font-weight: 800; text-decoration: none; }

.editor-note { margin-top: 24px; padding: 22px 24px; color: var(--about-muted); line-height: 1.65; }
.editor-note strong { color: var(--about-ink); }
.editor-note a { color: var(--about-lime); }

.machine-paths { display: grid; gap: 12px; margin: 28px 0 0; padding: 0; list-style: none; }
.machine-paths li { display: grid; grid-template-columns: minmax(190px, 0.5fr) 1fr; gap: 20px; padding: 16px 0; border-top: 1px solid var(--about-line); }
.machine-paths a { color: var(--about-lime); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 0.86rem; overflow-wrap: anywhere; }
.machine-paths span { color: var(--about-muted); line-height: 1.55; }

.post-main { width: min(1160px, calc(100% - 40px)); margin: 0 auto; padding: clamp(64px, 9vw, 110px) 0 100px; }
.post-header { max-width: 920px; margin: 0 auto 64px; text-align: center; }
.post-header h1 { font-size: clamp(3rem, 7vw, 6.4rem); }
.post-header .post-deck { margin-inline: auto; }
.post-meta { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px 22px; margin-top: 24px; color: #8f9d91; font-size: 0.78rem; }
.post-disclosure { max-width: 780px; margin: 30px auto 0; padding: 18px 20px; border: 1px solid var(--about-line); color: var(--about-muted); font-size: 0.82rem; line-height: 1.6; text-align: left; }
.post-disclosure strong { color: var(--about-ink); }

.post-layout { display: grid; grid-template-columns: 205px minmax(0, 760px); justify-content: center; gap: clamp(38px, 7vw, 82px); align-items: start; }
.post-toc { position: sticky; top: 100px; display: grid; gap: 12px; padding: 20px 0; border-block: 1px solid var(--about-line); }
.post-toc strong { font-family: var(--about-serif); }
.post-toc a { color: #929f94; font-size: 0.78rem; line-height: 1.35; text-decoration: none; }
.post-toc a:hover { color: var(--about-lime); }
.post-content { min-width: 0; }
.post-content section { margin-top: 78px; scroll-margin-top: 100px; }
.post-content section:first-child { margin-top: 0; }
.post-content h2 { font-size: clamp(2rem, 4.5vw, 3.4rem); }
.post-content h3 { margin: 34px 0 12px; color: #edf2e8; font-size: 1.2rem; }
.post-content p,
.post-content li,
.post-content dd { color: var(--about-muted); font-size: 1rem; line-height: 1.82; }
.post-content a { color: #d5f580; text-underline-offset: 3px; }
.post-content code { padding: 0.12em 0.34em; border: 1px solid var(--about-line); color: #ddf598; background: rgba(1, 8, 5, 0.68); }
.post-content table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
.post-content th,
.post-content td { padding: 13px 12px; border-bottom: 1px solid var(--about-line); color: var(--about-muted); text-align: left; vertical-align: top; }
.post-content th { color: var(--about-ink); }
.table-scroll { overflow-x: auto; border: 1px solid var(--about-line); border-radius: 3px 18px 3px 18px; }
.article-callout { margin: 28px 0; padding: 22px 24px; }
.article-callout strong { color: var(--about-lime); }
.article-callout p { margin-bottom: 0; }
.post-content details { padding: 18px 0; border-top: 1px solid var(--about-line); }
.post-content summary { color: var(--about-ink); font-weight: 800; cursor: pointer; }

.about-footer { border-top: 1px solid var(--about-line); color: #91a095; font-size: 0.78rem; }

@media (max-width: 820px) {
  .about-header,
  .about-footer { align-items: flex-start; flex-direction: column; }
  .principle-grid,
  .blog-grid,
  .facts-grid { grid-template-columns: 1fr; }
  .post-layout { grid-template-columns: 1fr; }
  .post-toc { position: static; }
  .machine-paths li { grid-template-columns: 1fr; gap: 6px; }
}

@media (max-width: 560px) {
  .about-header nav { gap: 10px 14px; }
  .about-hero,
  .blog-hero,
  .post-main { width: min(100% - 28px, 1180px); }
  .about-band { padding-inline: 14px; }
  .blog-card { min-height: 250px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; }
}