/* GothUI — landing page. All assets are local. */
:root {
  color-scheme: dark;
  --background: #111219;
  --surface: #1b1d29;
  --text: #f2f1ef;
  --muted: #b2b3c1;
  --line: #383a49;
  --accent: #c0b4ff;
  --ink: #1e1933;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
  line-height: 1.6;
  background: var(--background);
  color: var(--text);
}
* { box-sizing: border-box; }
body { margin: 0; }
a { color: inherit; text-underline-offset: .25em; }
a:hover { color: var(--accent); }
a:focus-visible, summary:focus-visible, pre:focus-visible, .table-scroll:focus-visible { outline: 3px solid var(--accent); outline-offset: 6px; }
button, a, summary { -webkit-tap-highlight-color: transparent; }
::selection { background: var(--accent); color: var(--ink); }
.page { max-width: 1920px; margin-inline: auto; padding-inline: clamp(1.25rem, 5vw, 5rem); }
.skip-link { position: absolute; top: -8rem; left: 1.25rem; z-index: 10; background: var(--accent); color: var(--ink); padding: .75rem 1rem; }
.skip-link:focus { top: 1rem; }
.masthead { display: flex; align-items: center; justify-content: space-between; gap: 1.25rem; padding-block: 1rem; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: .7rem; font-size: 1.3rem; font-weight: 750; text-decoration: none; letter-spacing: -.04em; }
.brand img { display: block; flex: none; inline-size: 48px; block-size: 48px; }
.brand-copy { display: grid; gap: .2rem; }
.brand-name { font-size: 1.4rem; line-height: 1; }
.brand-name > span { color: var(--accent); }
.brand-tagline { color: var(--muted); font-size: .75rem; font-weight: 450; line-height: 1.4; letter-spacing: 0; }
.edition, .preview-label, .preview-index, figcaption, .sample-kicker, .principle-number, .binary-label { font-family: ui-monospace, "SFMono-Regular", Consolas, monospace; font-size: .7rem; letter-spacing: .08em; }
.edition { color: var(--muted); }
.source-link { font-size: .85rem; text-decoration: none; }
.source-link span { margin-left: .55rem; color: var(--accent); }
.hero { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); align-items: center; gap: clamp(2rem, 4vw, 5rem); padding-block: clamp(2.5rem, 4vw, 4rem); }
.hero-copy { min-width: 0; max-inline-size: 42rem; }
.eyebrow { display: flex; align-items: center; gap: .6rem; margin: 0 0 1.75rem; font-size: .78rem; color: var(--muted); }
.status-dot { width: .45rem; height: .45rem; border-radius: 50%; background: #bce0cc; box-shadow: 0 0 0 4px #bce0cc12; }
h1 { margin: 0; font-size: clamp(2.5rem, 4vw, 3.6rem); letter-spacing: -.045em; line-height: 1.1; font-weight: 650; }
h1 span { color: var(--accent); }
.intro { font-size: clamp(1.05rem, 1.4vw, 1.2rem); color: var(--muted); max-width: 46ch; margin: 1.65rem 0 2rem; line-height: 1.7; }
.announcement { border-left: 2px solid var(--accent); padding-left: 1rem; margin-block: 2rem; }
.announcement p { margin: .25rem 0; font-size: .87rem; color: var(--muted); max-width: 38ch; }
.announcement .coming-soon { color: var(--text); font-weight: 650; font-size: 1rem; }
.button { display: inline-flex; align-items: center; justify-content: space-between; gap: 1.4rem; padding: .85rem 1.2rem; background: var(--accent); color: var(--ink); border: 1px solid var(--accent); border-radius: .5rem; text-decoration: none; font-weight: 650; font-size: .9rem; transition: background-color 160ms ease; }
.button:hover { background: #d8cfff; color: var(--ink); }
.small-note { margin-top: .9rem; font-size: .72rem; color: var(--muted); }
.showcase { container-type: inline-size; margin: 0; min-width: 0; border: 1px solid var(--line); border-radius: 1rem; background: var(--surface); overflow: hidden; }
.preview-top, figcaption { display: flex; align-items: center; justify-content: space-between; gap: .75rem; padding: 1.1rem 1.3rem; color: var(--muted); }
.preview-top { border-bottom: 1px solid var(--line); }
.preview-index { color: var(--accent); white-space: nowrap; }
.preview-canvas { padding: clamp(1rem, 4cqi, 2rem); background-image: radial-gradient(#56576b66 .7px, transparent .7px); background-size: 16px 16px; }
.sample-card { min-inline-size: 0; background: #eeeaf6; color: #282238; padding: clamp(1.1rem, 4cqi, 2rem); border-radius: .75rem; box-shadow: 0 16px 40px #0003; }
.sample-header { display: flex; justify-content: space-between; align-items: center; gap: .75rem; }
.sample-icon { font-size: 2rem; color: #6350a7; line-height: 1; }
.sample-badge { border: 1px solid #9a91ad; border-radius: 2rem; padding: .25rem .6rem; font-size: .64rem; }
.sample-kicker { margin: 2rem 0 .75rem; color: #63576f; font-size: .62rem; letter-spacing: .06em; }
.sample-card h2 { font-size: clamp(1.45rem, 4.5cqi, 2rem); line-height: 1.15; letter-spacing: -.045em; font-weight: 650; margin: 0 0 .85rem; }
.sample-card > p:not(.sample-kicker) { max-width: 25ch; font-size: .85rem; color: #63576f; }
.swatches { display: flex; gap: .45rem; margin-block: 1.4rem 1.8rem; }
.swatches span { width: 1.65rem; height: 1.65rem; border-radius: 50%; border: 1px solid #746881; background: #b5a0ed; }
.swatches span:nth-child(2) { background: #a1badb; }
.swatches span:nth-child(3) { background: #b9cfb5; }
.swatches span:nth-child(4) { background: #e1ccac; }
details { border-top: 1px solid #b4aabd; padding-top: .9rem; }
summary { display: flex; justify-content: space-between; align-items: center; gap: 1rem; list-style: none; cursor: pointer; font-size: .8rem; font-weight: 600; min-height: 2rem; }
summary::-webkit-details-marker { display: none; }
summary span { font-size: 1.1rem; }
details[open] summary span { transform: rotate(45deg); }
details p { font-size: .8rem; color: #63576f; margin: .8rem 0 0; }
.sample-card summary:focus-visible { outline-color: #6350a7; }
.binary-label { margin: 1.3rem 0 -.75rem; color: var(--muted); font-size: .68rem; letter-spacing: 0; }
.binary-label span { color: var(--accent); margin-right: .4rem; }
figcaption { border-top: 1px solid var(--line); font-size: .6rem; letter-spacing: .03em; }
.principles { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr)); gap: clamp(1.5rem, 3vw, 3rem); border-top: 1px solid var(--line); padding-block: 2.25rem 3rem; }
.principle-number { color: var(--accent); }
.principles h2 { font-size: 1rem; font-weight: 600; margin: .6rem 0 .4rem; letter-spacing: -.015em; }
.principles p { margin: 0; font-size: .85rem; max-width: 45ch; color: var(--muted); }
footer { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 1rem; align-items: center; padding-block: 1.25rem; border-top: 1px solid var(--line); font-size: .72rem; color: var(--muted); }
footer p { margin: 0; }
.footer-separator { margin-inline: .65rem; color: var(--accent); }
footer a { text-decoration: none; }
@media (max-width: 64rem) {
  .hero { grid-template-columns: minmax(0, 1fr); gap: 2.5rem; }
}
@media (max-width: 850px) {
  .hero { gap: 2rem; }
  .edition { display: none; }
  h1 { font-size: clamp(2.4rem, 5.2vw, 3.6rem); }
  .sample-badge { font-size: .6rem; }
}
@media (max-width: 650px) {
  .hero { grid-template-columns: 1fr; padding-block: 3rem; gap: 2.5rem; }
  h1 { font-size: clamp(2.4rem, 8.8vw, 3.2rem); }
  .showcase { width: 100%; }
  .principles { grid-template-columns: 1fr; gap: 1.6rem; }
  .principles p { max-width: 45ch; }
  .source-link { font-size: .75rem; }
}
@media (prefers-reduced-motion: no-preference) {
  .hero-copy, .showcase { animation: arrive 450ms ease-out both; }
  .showcase { animation-delay: 100ms; }
  @keyframes arrive { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}
@media (forced-colors: active) {
  .button, .showcase, .sample-card, .brand-mark { border: 1px solid CanvasText; }
  .status-dot { background: CanvasText; }
}
@media print {
  :root { color-scheme: light; --background: white; --text: black; --muted: #333; --line: #777; --accent: #423170; }
  .hero { padding-block: 2rem; }
  .showcase, .sample-card { background: white; box-shadow: none; }
  .preview-canvas { background: none; }
  .button { background: white; color: black; }
  .skip-link { display: none; }
}

/* Primary navigation shared with the documentation links. */
.home-nav { display: flex; align-items: center; flex-wrap: wrap; gap: 1.5rem; font-size: .85rem; }
.home-nav a { text-decoration: none; }
@media (max-width: 850px) {
  .masthead { flex-wrap: wrap; }
  .home-nav { order: 3; width: 100%; gap: 1.2rem; }
}

.mascot-welcome { display: flex; align-items: center; gap: 1rem; margin-block: 0 1rem; }
.mascot-welcome > div { min-inline-size: 0; }
.mascot-welcome img { flex: none; inline-size: clamp(4rem, 18cqi, 7rem); block-size: auto; }
.mascot-welcome p { margin: .4rem 0; color: var(--text); font-size: 1.3rem; font-weight: 600; }
.mascot-welcome span { color: var(--muted); font-size: .75rem; }
.principles h2 a { text-decoration: none; }
.principles h2 a:hover { text-decoration: underline; }
@media (max-width: 650px) { .brand { gap: .4rem; } .brand img { inline-size: 40px; block-size: 40px; } .mascot-welcome { gap: .5rem; } }

/* Arrange the preview by its own available width, including on tablets. */
@container (min-width: 40rem) {
  .preview-canvas { display: grid; grid-template-columns: minmax(0, .7fr) minmax(0, 1.3fr); grid-template-areas: "welcome sample" "caption sample"; gap: 1.5rem; }
  .mascot-welcome { grid-area: welcome; flex-direction: column; align-items: flex-start; margin: 0; }
  .sample-card { grid-area: sample; }
  .binary-label { grid-area: caption; align-self: end; margin: 0; }
}