/* Revered Labs: one palette, one type scale, one header and footer for every page. Loaded last. */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Inter+Tight:wght@500;600;700&family=Instrument+Serif:ital@0;1&display=swap');

html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0a0a0b; --surface: #121214; --raise: #1a1a1d; --line: rgba(255,255,255,.08); --line-strong: rgba(255,255,255,.14);
  --ink: #f3f3f4; --muted: #a3a3aa; --faint: #6e6e76; --accent: #3b9bff; --good: #3ccf7a; --on-ink: #0a0a0b;
  --track: #121214; --thumb: #26262b; --thumb-shadow: none;
}
html[data-theme="light"] {
  color-scheme: light;
  --bg: #fafaf9; --surface: #ffffff; --raise: #f2f2ef; --line: rgba(0,0,0,.08); --line-strong: rgba(0,0,0,.14);
  --ink: #111113; --muted: #5c5c63; --faint: #8e8e95; --accent: #0a6cdf; --good: #13854a; --on-ink: #ffffff;
  --track: #ececea; --thumb: #ffffff; --thumb-shadow: 0 1px 3px rgba(0,0,0,.12);
}
html { -webkit-text-size-adjust: 100%; }
body { background: var(--bg); color: var(--ink); font: 400 16px/1.6 Inter, -apple-system, 'Segoe UI', sans-serif; -webkit-font-smoothing: antialiased; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

/* Header: brand, the four pages, theme. Sticky, quiet. */
header {
  position: sticky; top: 0; z-index: 20; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 16px;
  height: 68px; padding: 0 max(24px, calc((100% - 1180px) / 2)); margin: 0;
  background: color-mix(in srgb, var(--bg) 82%, transparent); backdrop-filter: blur(18px) saturate(140%); -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-bottom: 1px solid var(--line);
}
html[data-theme] header { background: color-mix(in srgb, var(--bg) 82%, transparent); }
header .brand { justify-self: start; display: flex; align-items: center; gap: 2px; font: 600 18px/1 'Inter Tight', Inter, sans-serif; letter-spacing: -.02em; color: var(--ink); text-decoration: none; }
header .brand b { font-weight: 400; color: var(--muted); margin-left: 4px; }
header .globe-logo { width: 30px; height: 30px; margin-right: 8px; }
header .audience-nav, html[data-theme] header .audience-nav {
  display: flex; gap: 2px; padding: 4px; margin: 0; border: 1px solid var(--line); border-radius: 999px;
  background: var(--track); box-shadow: none; backdrop-filter: none; -webkit-backdrop-filter: none;
}
html[data-theme] .audience-nav button {
  display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; border: 0; border-radius: 999px; background: transparent;
  color: var(--muted); font: 500 14px/1 Inter, sans-serif; box-shadow: none; transition: background .15s, color .15s;
}
html[data-theme] .audience-nav button:hover { color: var(--ink); background: transparent; }
html[data-theme] .audience-nav button[aria-selected="true"] { color: var(--ink); background: var(--thumb); box-shadow: var(--thumb-shadow); }
.tab-icon { width: 14px; height: 14px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
header .theme-toggle {
  justify-self: end; display: inline-grid; place-items: center; width: 38px; height: 38px; padding: 0; border: 1px solid var(--line); border-radius: 999px;
  background: transparent; color: var(--muted); font-size: 0; cursor: pointer;
}
header .theme-toggle:hover { color: var(--ink); border-color: var(--line-strong); }
header .theme-toggle svg { width: 17px; height: 17px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; }

/* Footer. */
footer.site-footer { display: block; }
.site-footer p { font-size: 14px; max-width: 300px; }
.site-footer nav > div { align-self: start; }
.site-footer #guide { font-size: 14px; padding: 0; }
.site-footer { border-top: 1px solid var(--line); margin-top: 40px; padding: 56px max(24px, calc((100% - 1180px) / 2)) 32px; color: var(--muted); font-size: 14px; }
.site-footer .foot-top { display: grid; grid-template-columns: 1.4fr 2fr; gap: 48px; }
.site-footer .brand { font: 600 18px/1 'Inter Tight', Inter, sans-serif; color: var(--ink); text-decoration: none; letter-spacing: -.02em; }
.site-footer .brand b { font-weight: 400; color: var(--muted); }
.site-footer .foot-brand p { margin: 12px 0 0; max-width: 300px; }
.site-footer nav { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.site-footer h4 { margin: 0 0 12px; font: 600 12px/1 Inter, sans-serif; letter-spacing: .08em; text-transform: uppercase; color: var(--faint); }
.site-footer nav a, .site-footer nav button { display: block; margin: 0 0 9px; padding: 0; border: 0; background: none; color: var(--muted); font: inherit; text-decoration: none; cursor: pointer; text-align: left; }
.site-footer nav a:hover, .site-footer nav button:hover { color: var(--ink); }
.site-footer .email { color: var(--ink); user-select: all; }
.site-footer .foot-base { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-top: 48px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--faint); font-size: 13px; }

@media (max-width: 760px) {
  header { grid-template-columns: 1fr auto; height: auto; padding: 12px 16px; row-gap: 12px; }
  header .audience-nav { grid-column: 1 / -1; grid-row: 2; justify-content: space-between; }
  html[data-theme] header .audience-nav button { flex: 1; justify-content: center; padding: 9px 6px; font-size: 13px; }
  header .theme-toggle { grid-column: 2; grid-row: 1; }
  .site-footer { padding: 40px 16px 24px; }
  .site-footer .foot-top { grid-template-columns: 1fr; gap: 32px; }
}
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; } }

/* The model library, in the same voice as AMI's pages. */
.page[data-page="dev"] :is(h1, h2, h3) { font-family: 'Inter Tight', Inter, sans-serif; letter-spacing: -.03em; }
.live-dot { display: none; }
.page[data-page="dev"] .hub-motto { font: italic 400 clamp(26px, 3vw, 40px)/1.2 'Instrument Serif', Georgia, serif; color: var(--ink); letter-spacing: -.01em; }
.page[data-page="dev"] .eyebrow { font: 600 12px/1 Inter, sans-serif; letter-spacing: .08em; color: var(--faint); }

/* Headlines get room to breathe: two lines never touch. */
.page[data-page="dev"] h1 { line-height: 1.1; letter-spacing: -.03em; }
.page[data-page="dev"] h2 { line-height: 1.15; }

/* The dialog's close button: a round, centered X. */
dialog .close, html[data-theme] dialog .close {
  float: right; display: grid; place-items: center; width: 40px; height: 40px; padding: 0; border-radius: 50%;
  border: 1px solid var(--line-strong); background: var(--raise); color: var(--ink); box-shadow: none; font: 400 22px/1 Inter, sans-serif; cursor: pointer;
}
dialog .close:hover { background: var(--surface); border-color: var(--faint); }
dialog .close:focus:not(:focus-visible) { outline: none; }