/* BASE — reset, typography roles, layout helpers, focus, reveal */

*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + var(--s-4));
}

body {
  margin: 0;
  min-height: 100svh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}

img, svg { display: block; max-width: 100%; }
h1, h2, h3, p, ul, ol, figure, blockquote, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; padding: 0; }
[hidden] { display: none !important; }

/* ---- Type roles ---- */
.t-display {
  font-family: var(--font-display);
  font-size: var(--fs-display);
  font-weight: 700;
  line-height: var(--lh-tight);
  letter-spacing: -0.035em;
  text-wrap: balance;
}
.t-h1 {
  font-family: var(--font-display);
  font-size: var(--fs-h1);
  font-weight: 600;
  line-height: var(--lh-head);
  letter-spacing: -0.03em;
  text-wrap: balance;
}
.t-h2 {
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  font-weight: 600;
  line-height: var(--lh-head);
  letter-spacing: -0.025em;
  text-wrap: balance;
}
.t-h3 { font-family: var(--font-display); font-size: var(--fs-h3); font-weight: 600; line-height: 1.25; letter-spacing: -0.02em; }
.t-lead { font-size: var(--fs-body-lg); line-height: 1.5; color: var(--muted); max-width: 40ch; text-wrap: pretty; }
.t-small { font-size: var(--fs-small); }
.t-caption { font-size: var(--fs-caption); letter-spacing: 0.01em; }
.t-muted { color: var(--muted); }
.t-num { font-family: var(--font-display); font-variant-numeric: tabular-nums; letter-spacing: -0.04em; font-weight: 700; }
.accent { color: var(--accent); font-style: normal; }
.unit { font-size: 0.42em; margin-inline-start: 0.2em; letter-spacing: -0.02em; }

.eyebrow {
  font-size: var(--fs-caption);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

/* ---- Layout ---- */
.wrap { width: min(100% - var(--gutter) * 2, var(--maxw)); margin-inline: auto; }
.section { padding-block: clamp(var(--s-8), 11vw, var(--s-9)); }
.section--surface { background: var(--surface); }
.stack > * + * { margin-block-start: var(--stack, var(--s-4)); }

/* ---- A11y ---- */
.skip-link {
  position: fixed;
  inset-block-start: var(--s-3);
  inset-inline-start: var(--s-3);
  z-index: 100;
  padding: var(--s-3) var(--s-4);
  background: var(--accent);
  color: var(--on-accent);
  border-radius: var(--r-sm);
  font-weight: 600;
  transform: translateY(-200%);
}
.skip-link:focus-visible { transform: none; }

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--r-sm);
}
:focus:not(:focus-visible) { outline: none; }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

::selection { background: var(--accent); color: var(--on-accent); }

/* ---- Scroll reveal (only hidden when JS is running) ---- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(1.5rem);
  transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
  transition-delay: calc(var(--i, 0) * 90ms);
}
.js [data-reveal].is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js [data-reveal] { opacity: 1; transform: none; transition: none; }
}

/* Cross-fade between rhythms (View Transitions API) */
::view-transition-old(root),
::view-transition-new(root) { animation-duration: 600ms; animation-timing-function: var(--ease-out); }