@font-face {
  font-family: 'Instrument Sans';
  src: url('./assets/instrument-sans-latin.woff2') format('woff2');
  font-weight: 400 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'IBM Plex Mono';
  src: url('./assets/ibm-plex-mono-latin.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

:root {
  color-scheme: dark;
  --background: #171916;
  --foreground: #e9e9df;
  --muted: #a0a397;
  --accent: #c1cbaa;
  --line: #393c33;
  --hover: #1e211b;
  --mono: 'IBM Plex Mono', 'Courier New', monospace;
  font-family: 'Instrument Sans', 'Segoe UI', sans-serif;
  font-synthesis: none;
  font-size: 16px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 32px; }
body { margin: 0; background: var(--background); color: var(--foreground); -webkit-font-smoothing: antialiased; }
::selection { background: var(--accent); color: var(--background); }
a { color: inherit; text-decoration: none; transition: color 150ms ease; }
a:hover { color: var(--accent); }
button { font: inherit; }
button, summary { -webkit-tap-highlight-color: transparent; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 6px; }
p, h1, h2, h3, h4, figure { margin: 0; }
[hidden] { display: none !important; }
.wrap { width: min(1120px, calc(100% - 112px)); margin-inline: auto; }
.mono, .eyebrow { font-family: var(--mono); font-weight: 400; }
.eyebrow { font-size: 10px; line-height: 1.7; letter-spacing: 1.25px; text-transform: uppercase; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
.skip-link { position: fixed; top: 12px; left: 12px; z-index: 10; padding: 14px 20px; color: var(--background); background: var(--accent); transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }

.site-header { min-height: 88px; display: flex; align-items: center; justify-content: space-between; gap: 32px; border-bottom: 1px solid var(--line); }
.identity { display: inline-flex; align-items: center; gap: 13px; font-size: 14px; font-weight: 550; white-space: nowrap; }
.mark { display: block; width: 34px; height: 42px; object-fit: contain; flex-shrink: 0; }
.identity-author { color: var(--muted); font-weight: 400; margin-left: 3px; }
.main-nav { display: flex; align-items: center; gap: 28px; font-size: 13px; }
.main-nav a { padding-block: 12px; }
.external-link span { display: inline-block; margin-left: 6px; color: var(--muted); }

.hero { padding-block: 48px 36px; border-bottom: 1px solid var(--line); }
.hero > .eyebrow { color: var(--accent); margin-bottom: 16px; }
h1 { font-family: inherit; font-style: normal; font-size: clamp(56px, 7vw, 96px); line-height: 1.1; font-weight: 450; letter-spacing: -0.035em; }

.models-section { padding-top: 28px; }
.section-heading { display: flex; justify-content: space-between; align-items: center; gap: 24px; margin-bottom: 24px; }
.section-title-line { display: flex; align-items: baseline; gap: 12px; }
.section-title-line h2 { font-size: 30px; line-height: 1.2; letter-spacing: -0.8px; font-weight: 500; }
.section-count { color: var(--muted); font-size: 11px; }
.scale-filters { display: flex; align-items: center; gap: 4px; }
.filter-label { color: var(--muted); font-size: 10px; text-transform: uppercase; letter-spacing: 1px; margin-right: 12px; }
.scale-filters button { min-width: 44px; min-height: 42px; border: 0; border-bottom: 1px solid transparent; background: transparent; color: var(--muted); cursor: pointer; font-size: 13px; }
.scale-filters button:hover { color: var(--foreground); }
.scale-filters button[aria-pressed="true"] { border-bottom-color: var(--accent); color: var(--accent); }
.model-grid { display: grid; grid-template-columns: 36px minmax(0, 1fr) 72px 88px 112px 28px; align-items: center; column-gap: 20px; }
.model-columns { border-bottom: 1px solid var(--line); padding-bottom: 12px; color: var(--muted); font-size: 10px; text-transform: uppercase; letter-spacing: 0.8px; }
.model { border-bottom: 1px solid var(--line); scroll-margin-top: 24px; }
.model > summary { list-style: none; min-height: 104px; cursor: pointer; padding-block: 22px; position: relative; transition: background-color 150ms ease; }
.model > summary::-webkit-details-marker { display: none; }
.model[open] > summary { background-color: var(--hover); }
.model > summary::before { content: ''; position: absolute; inset: 0 auto 0 -12px; width: 2px; background: transparent; transition: background-color 150ms ease; }
.model[open] > summary::before { background: var(--accent); }
.model-number { align-self: start; padding-top: 9px; color: var(--muted); font-size: 10px; }
.model-title-line { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; }
.model-name { font-size: 28px; font-weight: 450; letter-spacing: -0.7px; line-height: 1.2; }
.model-label { padding: 4px 7px; font-size: 9px; border: 1px solid #515746; color: var(--accent); line-height: 1.2; }
.legacy-label { color: var(--muted); font-size: 9px; }
.model-description { display: block; font-size: 13px; color: var(--muted); margin-top: 6px; line-height: 1.5; }
.model-scale { font-size: 21px; font-weight: 400; letter-spacing: -0.5px; }
.model-format { font-size: 11px; color: #bec1b4; }
.model-date { font-size: 11px; color: var(--muted); }
.expand-icon { display: block; position: relative; width: 28px; height: 28px; justify-self: end; }
.expand-icon::before, .expand-icon::after { content: ''; position: absolute; background: var(--muted); inset: 13px 7px auto; height: 1px; }
.expand-icon::after { transform: rotate(90deg); }
.model[open] .expand-icon::after { transform: rotate(0deg); }
.model[open] .model-name { color: var(--accent); }
.model-content { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: 48px; padding: 8px 28px 32px 56px; background-color: var(--hover); }
.model-content .eyebrow { color: var(--muted); margin-bottom: 12px; }
.model-notes > p { font-size: 14px; line-height: 1.75; color: #bec1b4; max-width: 55ch; }
.model-notes > .model-note { color: var(--muted); font-size: 12px; margin-top: 14px; }
.model-facts { display: grid; gap: 10px; margin: 24px 0 0; }
.model-facts > div { display: grid; grid-template-columns: 97px minmax(0, 1fr); column-gap: 12px; font-size: 11px; line-height: 1.6; }
.model-facts dt { color: var(--muted); }
.model-facts dd { margin: 0; overflow-wrap: anywhere; }
.download-file { display: flex; justify-content: space-between; align-items: center; gap: 15px; min-height: 49px; border-bottom: 1px solid var(--line); font-size: 13px; }
.download-file:hover { background: #262a22; }
.file-format { color: var(--muted); font-size: 11px; margin-left: 5px; }
.file-size { font-size: 10px; color: var(--muted); white-space: nowrap; }
.file-size > span { color: var(--accent); margin-left: 12px; font-size: 16px; }
.release-link { display: inline-flex; align-items: center; gap: 8px; padding-block: 8px; margin-top: 8px; font-size: 12px; color: var(--accent); }
.archive-footer { display: flex; align-items: center; flex-wrap: wrap; gap: 4px 24px; margin-top: 12px; font-size: 12px; line-height: 1.6; }
.archive-hint { color: var(--muted); }
.archive-footer > a { display: inline-flex; align-items: center; gap: 8px; padding-block: 8px; color: var(--accent); }
.archive-footer > a:hover { color: var(--foreground); }

.about-section { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 64px; padding-block: 32px 40px; margin-top: 48px; border-top: 1px solid var(--line); }
.about-copy > .eyebrow { color: var(--muted); margin-bottom: 16px; }
.about-copy > p { font-size: 21px; line-height: 1.5; letter-spacing: -0.35px; max-width: 38ch; }
.text-link { display: inline-flex; align-items: center; gap: 8px; font-size: 12px; margin-top: 16px; padding-block: 8px; }
.text-link span { color: var(--muted); }
.license-note { border-left: 1px solid var(--line); padding-left: 32px; }
.license-note > .eyebrow { color: var(--muted); }
.license-note p { color: var(--muted); margin-top: 16px; font-size: 13px; line-height: 1.75; }
.license-name { color: #c2c5b8; }
.license-note .text-link { margin-top: 12px; }
.license-commercial { display: block; font-size: 11px; color: var(--muted); padding-block: 8px; }
.license-commercial span { margin-left: 8px; }
.site-footer { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding-block: 24px; border-top: 1px solid var(--line); }
.footer-signature { display: inline-flex; align-items: baseline; gap: 12px; font-size: 16px; font-weight: 500; letter-spacing: -0.3px; }
.footer-byline { font-family: var(--mono); font-size: 10px; font-weight: 400; letter-spacing: 0; color: var(--muted); }
.site-footer nav { display: flex; gap: 24px; font-size: 12px; }
.site-footer nav a { padding-block: 10px; }
.site-footer nav a span { color: var(--muted); margin-left: 5px; }

@media (hover: hover) and (pointer: fine) {
  .model > summary:hover { background-color: var(--hover); }
  .model > summary:hover::before { background: var(--accent); }
}

@media (max-width: 1150px) {
  .wrap { width: calc(100% - 80px); }
  .model-grid { grid-template-columns: 32px minmax(0, 1fr) 64px 72px 108px 28px; column-gap: 16px; }
  .model-content { padding-left: 48px; padding-right: 24px; gap: 32px; }
  .about-section { grid-template-columns: minmax(0, 1fr) 300px; gap: 40px; }
  .about-copy > p { font-size: 20px; }
}

@media (max-width: 820px) {
  .wrap { width: calc(100% - 48px); }
  .site-header { min-height: 81px; }
  .main-nav { gap: 23px; font-size: 12px; }
  .hero { padding-block: 40px 32px; }
  .section-title-line h2 { font-size: 28px; }
  .model-grid { grid-template-columns: 30px minmax(0, 1fr) 48px 62px 28px; column-gap: 12px; }
  .model-columns > :nth-child(5), .model-date { display: none; }
  .model-name { font-size: 26px; }
  .model-format { font-size: 10px; }
  .model-content { grid-template-columns: 1fr 1fr; padding-left: 42px; padding-right: 16px; gap: 30px; }
  .model-notes > p { font-size: 13px; }
  .model-facts > div { grid-template-columns: 1fr; gap: 3px; }
  .model-facts { gap: 13px; }
  .download-file { font-size: 12px; }
  .file-format { margin-left: 0; }
  .file-size { font-size: 9px; }
  .file-size > span { margin-left: 4px; }
  .about-section { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); margin-top: 40px; gap: 32px; }
  .license-note { padding-left: 24px; }
  .site-footer nav { gap: 17px; }
}

@media (max-width: 600px) {
  .wrap { width: calc(100% - 40px); }
  .site-header { min-height: 75px; gap: 12px; }
  .identity { gap: 9px; font-size: 13px; }
  .identity-author { display: none; }
  .mark { width: 29px; height: 36px; }
  .main-nav { gap: 19px; font-size: 11px; }
  .external-link span { margin-left: 2px; }
  .hero { padding-block: 32px 28px; }
  .hero > .eyebrow { font-size: 9px; letter-spacing: 1px; margin-bottom: 12px; }
  h1 { font-size: clamp(56px, 16vw, 72px); }
  .models-section { padding-top: 20px; }
  .section-heading { gap: 12px; margin-bottom: 20px; }
  .section-title-line { gap: 9px; }
  .section-title-line h2 { font-size: 26px; letter-spacing: -0.6px; }
  .section-count { font-size: 10px; }
  .filter-label { display: none; }
  .scale-filters { gap: 1px; }
  .scale-filters button { min-width: 40px; font-size: 12px; }
  .model-columns { display: none; }
  .model-list { border-top: 1px solid var(--line); }
  .model > summary { grid-template-columns: 23px minmax(0, 1fr) 34px 24px; column-gap: 10px; row-gap: 8px; padding-block: 20px; min-height: 116px; }
  .model-number { padding-top: 8px; font-size: 9px; }
  .model-title-line { gap: 9px; }
  .model-name { font-size: 25px; }
  .model-label { font-size: 8px; padding: 3px 5px; }
  .legacy-label { font-size: 9px; }
  .model-description { font-size: 13px; line-height: 1.5; max-width: 28ch; }
  .model-scale { align-self: start; margin-top: 7px; font-size: 18px; text-align: right; }
  .model-format { grid-column: 2; grid-row: 2; color: var(--muted); font-size: 10px; }
  .expand-icon { grid-column: 4; grid-row: 1; align-self: start; margin-top: 3px; width: 24px; }
  .expand-icon::before, .expand-icon::after { inset-inline: 5px; }
  .model > summary::before { left: -10px; }
  .model-content { grid-template-columns: 1fr; padding: 0 16px 27px 33px; gap: 28px; }
  .model-notes > p { font-size: 13px; }
  .model-notes > .model-note { font-size: 11px; }
  .model-facts > div { grid-template-columns: 78px minmax(0, 1fr); gap: 8px; font-size: 10px; }
  .model-facts { margin-top: 19px; gap: 10px; }
  .download-file { font-size: 12px; min-height: 49px; }
  .file-size { font-size: 10px; }
  .file-size > span { margin-left: 13px; }
  .archive-footer { flex-direction: column; align-items: flex-start; gap: 0; margin-top: 16px; font-size: 11px; }
  .about-section { grid-template-columns: 1fr; margin-top: 32px; padding-block: 28px 32px; gap: 28px; }
  .about-copy > p { font-size: 20px; max-width: 30ch; }
  .text-link { margin-top: 12px; }
  .license-note { border-left: 0; border-top: 1px solid var(--line); padding: 24px 0 0; }
  .license-note p { margin-top: 12px; max-width: 42ch; }
  .license-note .text-link { margin-top: 10px; }
  .site-footer { flex-direction: column; align-items: flex-start; gap: 12px; }
  .site-footer nav { width: 100%; justify-content: space-between; gap: 12px; font-size: 11px; }
}

@media (max-width: 370px) {
  .wrap { width: calc(100% - 32px); }
  .main-nav { gap: 13px; }
  .model-label { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}