:root {
  color-scheme:light;
  --background:#fafbf7;
  --surface:#fff;
  --surface-soft:#edf2e9;
  --ink:#102e32;
  --muted:#486064;
  --primary:#225349;
  --primary-dark:#183e37;
  --border:#cddbd1;
  --focus:#006ac6;
  --radius:1.1rem;
  --content-width:74rem;
  --reading-width:48rem;
}

* {
  box-sizing:border-box;
}

html {
  background:var(--background);
  scroll-padding-top:1rem;
}

body {
  margin:0;
  color:var(--ink);
  background:var(--background);
  font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:1rem;
  line-height:1.7;
  overflow-wrap:break-word;
}

a {
  color:var(--primary-dark);
  font-weight:650;
  text-underline-offset:.22em;
}

a:hover {
  color:#326c42;
}

a:focus-visible,summary:focus-visible {
  outline:3px solid var(--focus);
  outline-offset:5px;
  border-radius:3px;
}

h1,h2,h3,p,ul {
  margin-top:0;
}

h1,h2,h3 {
  line-height:1.15;
  letter-spacing:-.035em;
}

h1 {
  font-size:clamp(2.4rem,5.8vw,5.15rem);
  margin-bottom:1.7rem;
  font-weight:780;
}

h2 {
  font-size:clamp(1.8rem,3.5vw,2.75rem);
  margin-bottom:1.2rem;
  font-weight:730;
}

h3 {
  font-size:1.25rem;
  letter-spacing:-.02em;
  margin-bottom:.8rem;
}

p {
  margin-bottom:1.2rem;
}

.site-shell {
  width:min(calc(100% - 3rem),var(--content-width));
  margin-inline:auto;
}

.narrow-content,.reading,.policy {
  max-width:var(--reading-width);
}

.skip-link {
  position:absolute;
  left:1rem;
  top:-6rem;
  z-index:10;
  padding:.7rem 1rem;
  background:white;
}

.skip-link:focus {
  top:1rem;
}

.site-header {
  border-bottom:1px solid var(--border);
  background:var(--background);
}

.header-content {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1.5rem;
  padding-block:1.2rem;
}

.brand {
  display:inline-flex;
  align-items:center;
  gap:.6rem;
  font-size:1.4rem;
  letter-spacing:-.05em;
  font-weight:850;
  text-decoration:none;
  color:var(--ink);
}

.brand-mark {
  display:grid;
  place-items:center;
  background:var(--ink);
  color:#b9ef72;
  width:2rem;
  height:2rem;
  border-radius:.5rem;
  font-size:1.25rem;
}

.nav-list,.footer-links {
  display:flex;
  flex-wrap:wrap;
  gap:.3rem 1.5rem;
  list-style:none;
  padding:0;
  margin:0;
}

.nav-list a,.header-contact {
  font-size:.92rem;
  text-decoration:none;
  display:inline-block;
  padding:.35rem 0;
}

.nav-list a {
  color:var(--muted);
}

.nav-list a[aria-current="page"] {
  color:var(--ink);
  text-decoration:underline;
  text-decoration-thickness:2px;
}

.hero {
  padding:clamp(3rem,6vw,6rem) 0;
}

.hero-grid {
  display:grid;
  grid-template-columns:1.25fr 1fr;
  gap:clamp(2rem,6vw,6rem);
  align-items:center;
}

.eyebrow {
  font-size:.78rem;
  letter-spacing:.12em;
  font-weight:750;
  text-transform:uppercase;
  color:var(--primary);
  margin-bottom:1.4rem;
}

.hero h1 em {
  font-style:normal;
  color:#3b7243;
}

.lead {
  font-size:clamp(1.15rem,2vw,1.4rem);
  line-height:1.6;
  font-weight:520;
}

.intro {
  color:var(--muted);
  max-width:43rem;
}

.actions {
  display:flex;
  align-items:flex-start;
  flex-direction:column;
  gap:1rem;
  margin-top:2rem;
}

.button-link {
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:1.5rem;
  padding:.9rem 1.2rem;
  border-radius:.5rem;
  color:white;
  background:var(--primary);
  font-weight:700;
  text-decoration:none;
  line-height:1.5;
}

.button-link:hover {
  color:white;
  background:var(--primary-dark);
}

.text-link {
  font-size:.95rem;
}

.system-card {
  padding:clamp(1.6rem,3vw,2.6rem);
  border-radius:1.4rem;
  background:var(--ink);
  color:#f5f9f4;
  box-shadow:0 16px 0 -5px #d8e5d3;
}

.card-label {
  font-size:.7rem;
  font-weight:750;
  letter-spacing:.12em;
}

.system-card .card-label {
  color:#b9ef72;
  line-height:1.5;
  margin-bottom:1rem;
}

.system-row {
  display:flex;
  gap:1.2rem;
  border-top:1px solid #456367;
  padding:1.5rem 0;
}

.system-number {
  color:#b9ef72;
  font-size:.8rem;
  font-variant-numeric:tabular-nums;
}

.system-row h2 {
  font-size:1.3rem;
  letter-spacing:-.02em;
  margin:0 0 .5rem;
}

.system-row p {
  font-size:.95rem;
  color:#d0dedd;
  margin:0;
}

.system-note {
  margin:0;
  padding-top:1rem;
  border-top:1px solid #456367;
  font-size:.8rem;
  color:#d0dedd;
}

.principles {
  border-block:1px solid var(--border);
  padding:1rem 0;
}

.principles .site-shell {
  display:flex;
  flex-wrap:wrap;
  gap:.65rem 3rem;
  color:var(--muted);
  font-size:.85rem;
}

.principles span::before {
  content:'↗';
  color:var(--primary);
  margin-right:.6rem;
}

.section {
  padding:clamp(3rem,6vw,5.5rem) 0;
}

.section-soft {
  background:var(--surface-soft);
}

.section-heading {
  max-width:41rem;
  margin-bottom:2.5rem;
}

.section-heading>p:last-child {
  color:var(--muted);
}

.card-grid {
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:1.2rem;
}

.info-card {
  padding:1.7rem;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius);
}

.info-card .card-label {
  color:var(--primary);
  display:block;
  margin-bottom:1.5rem;
}

.info-card p {
  color:var(--muted);
}

.info-card>p:last-child {
  margin-bottom:0;
}

.guide-number {
  font-size:.72rem;
  letter-spacing:.09em;
  font-weight:750;
}

.guides h3 {
  font-size:1.5rem;
  line-height:1.3;
}

.guides h3 a {
  text-decoration:none;
}

.guides .text-link {
  display:inline-block;
  margin-top:1rem;
}

.notice {
  margin-top:2rem;
  padding:1.5rem 1.7rem;
  border-left:4px solid var(--primary);
  background:var(--surface-soft);
  border-radius:0 .6rem .6rem 0;
}

.notice h2,.notice h3 {
  font-size:1.2rem;
  margin-bottom:.6rem;
}

.notice p {
  margin-bottom:0;
  color:var(--muted);
}

.source-layout {
  display:grid;
  grid-template-columns:1fr 1.1fr;
  gap:3rem;
}

.source-layout>div>p {
  color:var(--muted);
}

details {
  border-bottom:1px solid var(--border);
  padding:1.2rem 0;
}

summary {
  font-weight:650;
  cursor:pointer;
  padding:.3rem 0;
}

details p {
  padding-top:1rem;
  margin-bottom:0;
  color:var(--muted);
}

.end-callout {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:2rem;
}

.end-callout p:last-child {
  color:var(--muted);
  margin-bottom:0;
}

.site-footer {
  border-top:1px solid var(--border);
  padding:2.5rem 0;
  background:var(--surface);
}

.footer-content {
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:2rem;
}

.footer-content p {
  font-size:.85rem;
  color:var(--muted);
  margin:1rem 0 0;
}

.footer-links {
  font-size:.9rem;
}

.article {
  padding-block:2.5rem 4rem;
}

.breadcrumb {
  font-size:.85rem;
  color:var(--muted);
  margin-bottom:3rem;
}

.article h1 {
  font-size:clamp(2.2rem,4.6vw,3.6rem);
  max-width:23ch;
}

.article h2 {
  font-size:clamp(1.45rem,3vw,1.85rem);
  margin-top:2.7rem;
}

.article p {
  max-width:70ch;
}

.article .lead {
  color:var(--muted);
}

.source-note {
  margin-top:3rem;
  padding:1.4rem 1.6rem;
  background:var(--surface-soft);
  border-radius:var(--radius);
  font-size:.88rem;
  overflow-wrap:anywhere;
}

.source-note h2 {
  font-size:1.15rem;
  margin-top:0;
}

.source-note p {
  margin-bottom:0;
}

.source-note ul,.related ul {
  padding-left:1.3rem;
}

.related ul {
  display:flex;
  flex-wrap:wrap;
  gap:.6rem 2rem;
}

.contact-card {
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:clamp(1.5rem,5vw,3rem);
  background:white;
}

.contact-card h1,.policy h1 {
  font-size:clamp(2.1rem,5vw,3.3rem);
}

.email-link {
  display:inline-block;
  overflow-wrap:anywhere;
  font-size:clamp(1rem,3.5vw,1.5rem);
}

.policy-meta {
  color:var(--muted);
  margin-bottom:2.5rem;
}

.policy section {
  margin-top:2.5rem;
}

.policy h2 {
  font-size:clamp(1.4rem,3vw,1.8rem);
}

.policy h3 {
  margin-top:1.6rem;
  font-size:1.1rem;
}

.policy p,.policy li {
  overflow-wrap:anywhere;
}

.policy ul {
  padding-left:1.3rem;
}

@media(max-width:60rem) {
  .header-content {
    flex-wrap:wrap;
    gap:.6rem 1.5rem;
  }
  .header-contact {
    margin-left:auto;
  }
  .header-content nav {
    order:3;
    flex-basis:100%;
  }
  .hero-grid {
    gap:2rem;
  }
  .card-grid {
    gap:.8rem;
  }
  .info-card {
    padding:1.2rem;
  }
  .source-layout {
    gap:2rem;
  }
  .nav-list {
    gap:.3rem 1.2rem;
  }
}

@media(max-width:44rem) {
  .site-shell {
    width:calc(100% - 2rem);
  }
  .hero-grid,.source-layout {
    grid-template-columns:1fr;
  }
  .hero h1 {
    font-size:clamp(2.8rem,12vw,4.8rem);
  }
  .system-card {
    max-width:100%;
  }
  .card-grid {
    grid-template-columns:1fr;
  }
  .source-layout {
    gap:1rem;
  }
  .end-callout,.footer-content {
    align-items:flex-start;
    flex-direction:column;
  }
  .principles .site-shell {
    gap:.4rem;
    flex-direction:column;
  }
  .nav-list {
    gap:.25rem 1rem;
  }
  .nav-list a {
    font-size:.86rem;
  }
  .article h1 {
    max-width:none;
  }
  .article .notice {
    padding:1.2rem;
  }
  .reading {
    width:calc(100% - 2rem);
  }
}

@media(prefers-reduced-motion:reduce) {
  html {
    scroll-behavior:auto;
  }
}

.screenshot-grid {
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(1rem,4vw,3rem);
  max-width:54rem;
  margin-inline:auto;
}

.screenshot-grid figure {
  margin:0;
  min-width:0;
}

.screenshot-grid img {
  display:block;
  width:100%;
  height:auto;
  border-radius:1rem;
  border:1px solid var(--border);
}

.screenshot-grid figcaption {
  font-size:.83rem;
  color:var(--muted);
  margin-top:1rem;
}

.card-label {
  font-size:.75rem;
}

@media(max-width:35rem) {
  .screenshot-grid {
    grid-template-columns:1fr;
    max-width:19rem;
    gap:2rem;
  }
}