:root {
  color-scheme: light;
  --ink: #17211f;
  --muted: #5d6965;
  --paper: #f6f4ee;
  --surface: #fffdfa;
  --line: #d7dbd2;
  --accent: #b5432d;
  --accent-dark: #8d3121;
  --moss: #dce5d6;
  --wide: 72rem;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Avenir Next", Avenir, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.55;
}

a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 0.2em; }

a:hover { color: var(--accent-dark); }

a:focus-visible,
button:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }

.skip-link {
  position: absolute;
  top: -6rem;
  left: 1rem;
  z-index: 2;
  padding: 0.65rem 0.9rem;
  background: var(--surface);
  border: 1px solid var(--ink);
}

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

.shell { width: min(calc(100% - 2rem), var(--wide)); margin: 0 auto; }

.site-header {
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 92%, transparent);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 5rem;
}

.brand { display: inline-flex; align-items: center; gap: 0.65rem; font-weight: 760; letter-spacing: -0.04em; text-decoration: none; }
.brand img { width: 1.75rem; height: 1.75rem; }

.site-nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 0.9rem 1.25rem; font-size: 0.9rem; }
.site-nav a { color: var(--muted); text-decoration: none; }
.site-nav a[aria-current="page"] { color: var(--ink); font-weight: 700; }

.eyebrow { margin: 0; color: var(--accent-dark); font-size: 0.78rem; font-weight: 760; letter-spacing: 0.11em; text-transform: uppercase; }

.hero { padding: clamp(4.5rem, 11vw, 9rem) 0 4rem; }

.hero-grid { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(15rem, 0.55fr); gap: clamp(2rem, 6vw, 6rem); align-items: end; }

h1,
h2,
h3 { margin: 0; color: var(--ink); font-weight: 760; letter-spacing: -0.055em; line-height: 0.97; }
h1 { max-width: 13ch; font-size: clamp(3rem, 7.5vw, 6.3rem); }
h2 { font-size: clamp(2.1rem, 4vw, 3.6rem); }
h3 { font-size: 1.25rem; }

.lede { max-width: 34rem; margin: 1.5rem 0 0; color: #38443f; font-size: clamp(1.12rem, 1.7vw, 1.36rem); line-height: 1.5; }
.hero-note { max-width: 20rem; margin: 0 0 0.35rem; color: var(--muted); font-size: 0.96rem; }
.hero-note strong { display: block; margin-bottom: 0.45rem; color: var(--ink); font-size: 1rem; }

.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 2rem; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 2.8rem; padding: 0.65rem 1rem; border: 1px solid var(--ink); border-radius: 0.25rem; font-weight: 700; text-decoration: none; transition: background-color 180ms ease, color 180ms ease, transform 180ms ease; }
.button:hover { background: var(--ink); color: var(--surface); }
.button:active { transform: translateY(1px); }
.button-secondary { border-color: var(--line); color: var(--ink); }
.button-secondary:hover { background: var(--moss); color: var(--ink); }

.rule { height: 1px; background: var(--line); }

.section { padding: clamp(3.5rem, 8vw, 7rem) 0; }
.section-heading { display: grid; grid-template-columns: minmax(0, 0.78fr) minmax(18rem, 1.22fr); gap: 2rem; align-items: start; }
.section-copy { max-width: 42rem; margin: 0; color: var(--muted); font-size: 1.08rem; }

.principles { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 1px; margin-top: 3rem; background: var(--line); border: 1px solid var(--line); }
.principle { min-height: 12rem; padding: 1.6rem; background: var(--surface); }
.principle p { max-width: 31rem; margin: 0.75rem 0 0; color: var(--muted); }
.principle-wide { grid-row: span 2; padding: clamp(1.6rem, 4vw, 3rem); background: var(--moss); }
.principle-wide p { max-width: 31rem; margin: 1rem 0 0; color: #405049; font-size: 1.15rem; }

.desk-band { background: var(--ink); color: #edf0e9; }
.desk-band h2 { color: #fffdfa; }
.desk-band .eyebrow { color: #f0b6a9; }
.desk-band .section-copy { color: #c6d0c9; }

.desk-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: clamp(2rem, 7vw, 7rem); align-items: start; }
.status { padding: 0.9rem 1rem; border-left: 3px solid #e1a193; background: #263330; color: #e1e8e1; font-size: 0.94rem; }
.status strong { color: #fffdfa; }

.definition-list { margin: 2rem 0 0; border-top: 1px solid #4e5d58; }
.definition-list div { display: grid; grid-template-columns: 10rem 1fr; gap: 1rem; padding: 1rem 0; border-bottom: 1px solid #4e5d58; }
.definition-list dt { font-size: 0.8rem; font-weight: 760; letter-spacing: 0.1em; text-transform: uppercase; }
.definition-list dd { margin: 0; color: #c6d0c9; }

.release-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 3rem; border-top: 1px solid var(--line); }
.release-list article { padding: 1.3rem 1.1rem 1.3rem 0; border-bottom: 1px solid var(--line); }
.release-list article + article { padding-left: 1.1rem; border-left: 1px solid var(--line); }
.release-list span { display: block; margin-bottom: 1.5rem; color: var(--accent-dark); font-family: ui-monospace, "SFMono-Regular", Menlo, monospace; font-size: 0.78rem; }
.release-list p { margin: 0.65rem 0 0; color: var(--muted); font-size: 0.94rem; }

.callout { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 2rem; align-items: end; margin-top: 3rem; padding: 2rem; background: var(--surface); border: 1px solid var(--line); }
.callout p { max-width: 42rem; margin: 0.75rem 0 0; color: var(--muted); }

.site-footer { padding: 2rem 0 3rem; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.9rem; }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem 2rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 0.6rem 1rem; }

.page-hero { padding: clamp(3.5rem, 8vw, 6rem) 0 3rem; }
.page-hero h1 { max-width: 15ch; }
.prose { max-width: 45rem; }
.prose p { color: var(--muted); font-size: 1.08rem; }
.prose h2 { margin-top: 3rem; font-size: 2rem; }
.prose ul { padding-left: 1.2rem; color: var(--muted); }
.prose li + li { margin-top: 0.65rem; }

.architecture-copy { display: grid; grid-template-columns: minmax(0, 0.78fr) minmax(18rem, 1.22fr); gap: 2rem; align-items: start; }
.architecture-copy h2 { margin-bottom: 1rem; }
.architecture-figure { margin-top: 2.5rem; margin-bottom: 0; }
.architecture-figure a { display: block; }
.architecture-figure img { display: block; width: 100%; height: auto; border: 1px solid var(--line); background: var(--surface); }
.architecture-figure figcaption { margin-top: 0.65rem; color: var(--muted); font-size: 0.9rem; }
.architecture-figure-home { margin-top: 3rem; }
.architecture-figure-home img { max-height: 38rem; object-fit: cover; object-position: top; }
.architecture-facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 2.5rem; background: var(--line); border: 1px solid var(--line); }
.architecture-facts article { padding: 1.4rem; background: var(--surface); }
.architecture-facts p { margin: 0.7rem 0 0; color: var(--muted); }
.context-band { background: var(--ink); color: #edf0e9; }
.context-band h2,
.context-band h3 { color: #fffdfa; }
.context-band .eyebrow { color: #f0b6a9; }
.context-band .section-copy,
.context-band .architecture-figure figcaption,
.context-band .architecture-decision p { color: #c6d0c9; }
.architecture-figure-dark img { border-color: #4e5d58; }
.architecture-decision { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 2rem; align-items: end; margin-top: 2.5rem; padding-top: 2rem; border-top: 1px solid #4e5d58; }
.architecture-decision p { max-width: 48rem; margin: 0.75rem 0 0; }
.context-band .button { border-color: #fffdfa; color: #fffdfa; }
.context-band .button:hover { background: #fffdfa; color: var(--ink); }

@media (max-width: 760px) {
  .shell { width: min(calc(100% - 2rem), var(--wide)); }
  .header-inner { align-items: flex-start; flex-direction: column; padding: 1.2rem 0; }
  .site-nav { justify-content: flex-start; }
  .hero-grid,
  .section-heading,
  .desk-grid,
  .architecture-copy { grid-template-columns: 1fr; }
  .hero-note { margin-top: 1rem; }
  .principles { grid-template-columns: 1fr; }
  .principle-wide { grid-row: auto; }
  .release-list { grid-template-columns: 1fr 1fr; }
  .release-list article:nth-child(3) { padding-left: 0; border-left: 0; }
  .callout { grid-template-columns: 1fr; }
  .definition-list div { grid-template-columns: 1fr; gap: 0.35rem; }
  .architecture-facts { grid-template-columns: 1fr; }
  .architecture-decision { grid-template-columns: 1fr; }
}

@media (max-width: 420px) {
  .release-list { grid-template-columns: 1fr; }
  .release-list article + article,
  .release-list article:nth-child(3) { padding-left: 0; border-left: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button { transition: none; }
}