/* A deliberately monochrome expression of Track's semantic web roles. */
:root {
  color-scheme: light dark;
  --canvas: #fff;
  --text: #000;
  --secondary: #606060;
  --border: #dedede;
  --page: min(960px, calc(100% - 96px));
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
@media (prefers-color-scheme: dark) {
  :root { --canvas: #000; --text: #fff; --secondary: #a0a0a0; --border: #303030; }
}
:root[data-theme="light"] { color-scheme: light; --canvas: #fff; --text: #000; --secondary: #606060; --border: #dedede; }
:root[data-theme="dark"] { color-scheme: dark; --canvas: #000; --text: #fff; --secondary: #a0a0a0; --border: #303030; }
* { box-sizing: border-box; }
html { scroll-padding-top: 32px; }
body { margin: 0; background: var(--canvas); color: var(--text); }
a { color: inherit; text-underline-offset: 4px; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible { outline: 2px solid var(--text); outline-offset: 6px; }
.site-header, main, footer { width: var(--page); margin-inline: auto; }
.site-header { display: flex; align-items: center; justify-content: space-between; padding-block: 36px; }
.brand { font-size: 23px; font-weight: 650; letter-spacing: -.055em; text-decoration: none; }
nav { display: flex; gap: 28px; font-size: 14px; }
nav a, footer > a { text-decoration: none; }
nav a:hover, footer > a:hover { text-decoration: underline; }
.hero { padding: 72px 0 84px; }
.eyebrow { margin: 0 0 28px; font-size: 13px; font-weight: 500; }
h1 { margin: 0; font-size: clamp(42px, 5.8vw, 76px); line-height: 1.06; font-weight: 500; letter-spacing: -.065em; }
.intro { margin: 28px 0 0; color: var(--secondary); font-size: 20px; line-height: 1.5; letter-spacing: -.02em; }
.beta-action { display: flex; align-items: center; gap: 24px; margin-top: 38px; }
.primary-action { display: inline-flex; align-items: center; gap: 30px; padding: 15px 18px; background: var(--text); color: var(--canvas); font-size: 14px; font-weight: 500; text-decoration: none; }
.primary-action:hover { opacity: .8; }
.beta-action p { margin: 0; font-size: 12px; line-height: 1.65; }
.beta-action p span { color: var(--secondary); }
.platforms { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; padding-top: 32px; border-top: 1px solid var(--border); }
h2 { margin: 0 0 14px; font-size: 19px; font-weight: 500; letter-spacing: -.035em; }
.platforms p { max-width: 38ch; margin: 0; color: var(--secondary); font-size: 15px; line-height: 1.65; }
.platforms .detail { margin-top: 20px; font-size: 12px; }
.beta-note { max-width: 70ch; margin: 48px 0 44px; color: var(--secondary); font-size: 12px; line-height: 1.65; }
footer { border-top: 1px solid var(--border); padding-block: 24px 32px; display: flex; justify-content: space-between; color: var(--secondary); font-size: 13px; }
footer nav { font-size: inherit; }
.skip-link { position: fixed; top: 12px; left: 12px; padding: 10px; background: var(--text); color: var(--canvas); transform: translateY(-180%); }
.skip-link:focus { transform: none; }
.document { max-width: 680px; padding-block: 64px; }
.document h1 { font-size: clamp(40px, 6vw, 60px); margin-bottom: 32px; }
.document h2 { margin-top: 36px; }
.document p { color: var(--secondary); font-size: 16px; line-height: 1.75; }
@media (max-width: 600px) {
  :root { --page: calc(100% - 40px); }
  .site-header { padding-block: 24px; }
  nav { gap: 22px; font-size: 13px; }
  .hero { padding: 58px 0 56px; }
  .eyebrow { margin-bottom: 24px; font-size: 12px; }
  h1 { font-size: clamp(32px, 7.8vw, 46px); letter-spacing: -.055em; line-height: 1.12; }
  .intro { font-size: 17px; margin-top: 24px; }
  .beta-action { margin-top: 30px; gap: 18px; }
  .primary-action { padding: 14px; gap: 18px; font-size: 13px; }
  .beta-action p { font-size: 11px; }
  .platforms { grid-template-columns: 1fr; gap: 32px; padding-top: 28px; }
  .platforms p { max-width: 100%; }
  .platforms .detail { margin-top: 12px; }
  .beta-note { margin-block: 36px 32px; }
  .document { padding-block: 40px; }
}