:root {
  color-scheme: light;
  --ink: #111111;
  --muted: #5f6468;
  --paper: #fbfaf5;
  --surface: #ffffff;
  --line: #d8d8d2;
  --line-dark: #111111;
  --blue: #0057ff;
  --chemdraft: #006b5e;
  --signal: var(--chemdraft);
  --font-display: "dunbar-low", "Futura", "Avenir Next", "Helvetica Neue", Arial, sans-serif;
  --font-text: "dunbar-text", "Avenir Next", "Helvetica Neue", Arial, sans-serif;
  --font-ui: var(--font-text);
  font-family: var(--font-text);
}

* { box-sizing: border-box; }

html { min-height: 100%; background: var(--paper); }

body {
  min-height: 100%;
  margin: 0;
  color: var(--ink);
  font-size: 16px;
  font-weight: 480;
  line-height: 1.55;
}

a { color: inherit; }

.site-header, .site-footer, main { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }

.site-header, .site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.site-header { min-height: 92px; border-bottom: 2px solid var(--line-dark); }

.site-footer {
  min-height: 92px;
  margin-top: 64px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

.site-nav, .site-footer nav, .action-line {
  display: flex;
  align-items: center;
  gap: clamp(0.85rem, 2vw, 1.5rem);
  flex-wrap: wrap;
}

.site-nav a, .site-footer a, .action-line a {
  color: var(--muted);
  font-family: var(--font-ui);
  font-size: 0.76rem;
  font-weight: 500;
  letter-spacing: 0.045em;
  text-decoration: none;
  text-transform: uppercase;
}

.site-nav a:hover, .site-footer a:hover, .action-line a:hover, .site-nav a[aria-current="page"] { color: var(--ink); }

.brand { display: inline-flex; align-items: center; gap: 0.8rem; color: var(--ink); text-decoration: none; }
.brand-mark {
  display: inline-grid; width: 28px; height: 28px; place-items: center;
  border: 1px solid var(--blue); background: var(--blue); color: var(--surface);
  font-family: var(--font-display); font-size: 0.72rem; font-weight: 700; line-height: 1;
}
.brand-name { font-size: 0.98rem; font-weight: 600; }

.app-hero { display: grid; gap: 1.1rem; max-width: 860px; padding: clamp(48px, 8vw, 86px) 0 clamp(36px, 6vw, 56px); }
.hero-heading { display: flex; align-items: center; gap: 1.25rem; }
.app-icon { width: clamp(72px, 12vw, 112px); height: auto; border: 1px solid var(--line-dark); }
.index-number {
  margin: 0; color: var(--muted); font-family: var(--font-ui); font-size: 0.76rem;
  letter-spacing: 0.045em; text-transform: uppercase;
}
.app-hero .index-number, .product-detail .index-number, .principles .index-number { color: var(--signal); }
h1, h2, p { margin-top: 0; }
h1 { margin-bottom: 0; font-family: var(--font-display); font-size: clamp(2.8rem, 5.6vw, 4.8rem); font-weight: 520; line-height: 1.04; }
h2 { margin-bottom: 0; font-family: var(--font-display); font-size: clamp(1.8rem, 4vw, 3.3rem); font-weight: 500; line-height: 1; }
.lead { max-width: 680px; margin-bottom: 0; color: var(--muted); font-size: 1.05rem; }

.download-box {
  display: inline-grid; width: fit-content; min-width: 220px; min-height: 56px; place-items: center;
  padding: 0.9rem 1.25rem; border: 2px solid var(--line-dark); background: var(--signal);
  box-shadow: 8px 8px 0 var(--line-dark); color: var(--surface); font-family: var(--font-ui);
  font-size: 0.86rem; font-weight: 700; letter-spacing: 0.045em; text-decoration: none; text-transform: uppercase;
}
.download-buttons { display: flex; flex-wrap: wrap; gap: 1.5rem 2.5rem; align-items: flex-start; }
.download-option { display: grid; gap: 0.5rem; justify-items: start; min-width: 0; }
.download-sub { margin: 0; color: var(--muted); font-family: var(--font-ui); font-size: 0.85rem; }
.download-option .release-meta { margin: 0; }
.report-bugs { max-width: 680px; margin: 0; color: var(--text); font-size: 0.92rem; }
.download-box:hover { box-shadow: 5px 5px 0 var(--line-dark); transform: translate(2px, 2px); }
.download-box:focus-visible, a:focus-visible { outline: 3px solid var(--signal); outline-offset: 4px; }
.release-meta { margin: -0.35rem 0 0; color: var(--muted); font-family: var(--font-ui); font-size: 0.8rem; }
.release-highlights { display: grid; grid-template-columns: 72px minmax(0, 1fr); gap: 1rem; max-width: 760px; padding: 1.25rem 0; border-top: 1px solid var(--line-dark); border-bottom: 1px solid var(--line); }
.release-highlights .index-number { color: var(--signal); }
.release-highlights h2 { margin-bottom: 1rem; font-size: clamp(1.6rem, 3vw, 2.3rem); }
.release-highlights ul { display: grid; gap: 0.65rem; margin: 0 0 1rem; padding: 0; list-style: none; }
.release-highlights li { color: var(--muted); }
.release-highlights strong { color: var(--ink); font-weight: 650; }

.action-line .repo-link {
  position: relative; display: inline-grid; grid-template-columns: 18px auto; gap: 0.6rem; align-items: center;
  min-height: 36px; padding: 0.44rem 0.7rem 0.44rem 0.48rem; border: 1px solid var(--line-dark); background: var(--surface); color: var(--ink);
}
.action-line .repo-link::before { content: ""; width: 14px; height: 14px; border: 1px solid var(--line-dark); background: var(--signal); box-shadow: 5px 5px 0 var(--line-dark); }
.action-line .repo-link:hover { border-color: var(--signal); color: var(--ink); transform: translate(1px, 1px); }
.action-line .repo-link:hover::before { box-shadow: 3px 3px 0 var(--line-dark); }

.features { display: grid; gap: clamp(3rem, 7vw, 5.5rem); padding: clamp(40px, 6vw, 72px) 0 clamp(56px, 8vw, 96px); border-top: 2px solid var(--line-dark); }
.features-head { display: grid; grid-template-columns: 72px minmax(0, 1fr); gap: 1rem; align-items: start; }
.features .index-number { color: var(--signal); }
.feature-row { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr); gap: clamp(1.75rem, 4vw, 3.5rem); align-items: start; }
.feature-row-wide { grid-template-columns: minmax(0, 1fr); }
.feature-row-wide .feature-copy { display: grid; grid-template-columns: 72px minmax(0, 1fr); gap: 1rem; }
.feature-row-flip .feature-shot { order: 2; }
.feature-row-text { grid-template-columns: 72px minmax(0, 1fr); gap: 1rem; padding-top: clamp(2rem, 5vw, 3rem); border-top: 1px solid var(--line); }
.feature-copy { display: grid; gap: 1rem; min-width: 0; }
.code-block { max-width: 100%; margin: 0; padding: 0.8rem 1rem; overflow-x: auto; border: 1px solid var(--line-dark); background: var(--surface); font-size: 0.85rem; }
.code-block code, .assistants code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.assistants .feature-row-text .copy-stack { min-width: 0; }
.assistants .feature-row-text .copy-stack p { overflow-wrap: anywhere; }
.feature-shot { margin: 0; min-width: 0; }
.feature-shot-link { display: block; }
.feature-shot img {
  display: block; width: 100%; height: auto; border: 1px solid var(--line-dark); background: var(--surface);
  box-shadow: 12px 12px 0 color-mix(in srgb, var(--signal) 14%, transparent);
}
.feature-shot figcaption { max-width: 680px; margin-top: 1.1rem; color: var(--muted); font-family: var(--font-ui); font-size: 0.8rem; line-height: 1.45; }
.prompt-example { display: grid; gap: 0.5rem; min-width: 0; }
.prompt-label { margin: 0; color: var(--muted); font-family: var(--font-ui); font-size: 0.75rem; letter-spacing: 0.06em; text-transform: uppercase; }
.prompt-line { margin: 0; padding: 0.8rem 1rem; border: 1px solid var(--line-dark); border-left: 4px solid var(--signal); background: var(--surface); }
.prompt-line p { margin: 0; font-size: 1.05rem; overflow-wrap: anywhere; }
.gallery-note { margin: 0; color: var(--muted); font-family: var(--font-ui); font-size: 0.75rem; }
.example-gallery { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.6fr); gap: clamp(1.25rem, 3vw, 2rem); align-items: start; }
.example-card { display: grid; gap: 0.9rem; min-width: 0; padding: 1rem; border: 1px solid var(--line); }
.example-card .feature-shot img { box-shadow: none; }
.example-shot { max-width: 100%; }
.example-card .feature-shot-link { display: flex; justify-content: center; }
.example-card-tall .feature-shot img { width: auto; max-width: 100%; max-height: 300px; }
.example-card-wide .feature-shot img { max-height: 340px; object-fit: contain; }
.feature-list { display: grid; margin: 0; padding: 0; border-top: 1px solid var(--line-dark); list-style: none; }
.feature-list li { padding: 0.95rem 0; border-bottom: 1px solid var(--line); color: var(--muted); overflow-wrap: anywhere; }
.feature-list strong { color: var(--ink); font-weight: 650; }
.feature-list-columns { grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: clamp(1.5rem, 4vw, 3rem); }
.feature-row-wide .feature-list { grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: clamp(1.5rem, 4vw, 3rem); }

.spec-grid {
  display: grid; grid-template-columns: minmax(280px, 0.9fr) minmax(320px, 1.1fr); gap: clamp(2rem, 6vw, 6rem);
  align-items: stretch; padding: 0 0 clamp(56px, 8vw, 96px);
}
.spec-grid dl { display: grid; margin: 0; border-top: 1px solid var(--line-dark); }
.spec-grid dl > div { display: grid; grid-template-columns: minmax(90px, 0.45fr) 1fr; gap: 1rem; padding: 1.05rem 0; border-bottom: 1px solid var(--line); }
dt { color: var(--muted); font-family: var(--font-ui); font-size: 0.74rem; letter-spacing: 0.04em; text-transform: uppercase; }
dd { margin: 0; color: var(--muted); }
.download-note { display: grid; align-content: start; gap: 1rem; padding: clamp(1.5rem, 4vw, 3rem); border: 1px solid var(--line-dark); background: var(--surface); box-shadow: 12px 12px 0 color-mix(in srgb, var(--signal) 14%, transparent); }
.download-note .index-number { color: var(--signal); }
.download-note p { margin-bottom: 0; color: var(--muted); }

.product-detail, .principles {
  display: grid; grid-template-columns: 72px minmax(220px, 0.65fr) minmax(260px, 1fr); gap: 1rem;
  align-items: start; padding: clamp(56px, 8vw, 96px) 0; border-top: 1px solid var(--line);
}
.copy-stack { display: grid; gap: 0.9rem; }
.copy-stack h2 { max-width: 560px; }
.copy-stack p { max-width: 620px; margin-bottom: 0; color: var(--muted); }
.detail-list { display: grid; margin: 0; padding: 0; border-top: 1px solid var(--line-dark); list-style: none; }
.detail-list li { display: grid; grid-template-columns: minmax(92px, 0.45fr) minmax(0, 1fr); gap: 1rem; padding: 1rem 0; border-bottom: 1px solid var(--line); }
.detail-list strong { color: var(--ink); font-family: var(--font-ui); font-size: 0.74rem; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; }
.detail-list span { color: var(--muted); }

.principles { padding-bottom: 24px; }
.principles ol { display: grid; gap: 1rem; margin: 0; padding: 0; list-style: none; counter-reset: principle; }
.principles li { display: grid; grid-template-columns: 44px 1fr; gap: 1rem; align-items: baseline; counter-increment: principle; }
.principles li::before { content: counter(principle, decimal-leading-zero); color: var(--muted); font-family: var(--font-ui); font-size: 0.74rem; }
.principles li span { color: var(--muted); }
.text-link { color: var(--ink); text-underline-offset: 0.18em; }

@media (max-width: 820px) {
  .site-header, .site-footer { align-items: flex-start; flex-direction: column; justify-content: center; padding: 1rem 0; }
  .spec-grid, .product-detail, .principles { grid-template-columns: 1fr; }
  .principles { gap: 1.5rem; }
  .features-head, .feature-row, .feature-row-wide .feature-copy, .feature-row-text, .release-highlights { grid-template-columns: minmax(0, 1fr); }
  .feature-row-flip .feature-shot { order: 0; }
  .feature-list-columns, .feature-row-wide .feature-list { grid-template-columns: minmax(0, 1fr); }
  .example-gallery { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 460px) {
  .site-header, .site-footer, main { width: min(100% - 24px, 1120px); }
  h1 { font-size: 2.8rem; }
  .site-nav, .site-footer nav, .action-line { gap: 0.8rem; }
  .detail-list li, .spec-grid dl > div { grid-template-columns: 1fr; }
  .hero-heading { align-items: flex-end; gap: 0.8rem; }
  .example-card { padding: 0.75rem; }
  .example-card-tall .feature-shot img { max-height: 240px; }
  .feature-shot img { box-shadow: 6px 6px 0 color-mix(in srgb, var(--signal) 14%, transparent); }
}