/* ---------------------------------------------------------------
   Adeia — base layer

   Reset, grounds, container, and the shared type and control classes
   every section builds on. Section-specific layout lives in its own
   file; nothing here uses element selectors that could collide with it.
   --------------------------------------------------------------- */

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--ink);
  color: var(--on-ink);
  font-family: var(--sans);
  font-size: var(--t-body);
  line-height: var(--lh-body);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img,
svg,
canvas {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
}

:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 3px;
}

/* ---------- grounds ----------
   The page steps through these in order. Each sets its own text colours
   so nested type never has to know which ground it is sitting on. */
.ground {
  position: relative;
}

.ground--ink {
  background: var(--ink);
  color: var(--on-ink);
  --quiet: var(--on-ink-quiet);
  --rule: var(--rule-on-ink);
  --display-mark: var(--orchid);
}

.ground--bone {
  background: var(--bone);
  color: var(--on-bone);
  --quiet: var(--on-bone-quiet);
  --rule: var(--rule-on-bone);
  --display-mark: var(--on-bone);
}

.ground--paper {
  background: var(--paper);
  color: var(--on-paper);
  --quiet: var(--on-paper-quiet);
  --rule: var(--rule-on-paper);
  --display-mark: var(--on-paper);
}

.ground--forest {
  background: var(--forest);
  color: var(--on-forest);
  --quiet: var(--on-forest-quiet);
  --rule: var(--rule-on-forest);
  --display-mark: var(--orchid);
}

/* ---------- container ---------- */
.container {
  width: 100%;
  padding-inline: var(--pad-x);
}

.section {
  padding-block: var(--sec-y);
}

/* ---------- type ---------- */
.display,
.h1,
.h2,
.h3 {
  font-family: var(--sans);
  font-weight: 500;
  letter-spacing: normal;
  margin: 0;
  text-wrap: balance;
}

.display {
  font-size: var(--t-display);
  line-height: var(--lh-display);
  text-transform: uppercase;
  color: var(--display-mark);
}

.h1 {
  font-size: var(--t-h1);
  line-height: var(--lh-h1);
  text-transform: uppercase;
}

.h2 {
  font-size: var(--t-h2);
  line-height: var(--lh-h2);
}

.h3 {
  font-size: var(--t-h3);
  line-height: var(--lh-h3);
}

.lead {
  font-size: var(--t-lead);
  font-weight: 500;
  line-height: 1.4;
  margin: 0;
}

.body {
  font-size: var(--t-body);
  line-height: var(--lh-body);
  margin: 0;
}

.quiet {
  color: var(--quiet);
}

/* The mono eyebrow that sits above every section title. */
.label {
  display: block;
  font-family: var(--mono);
  font-size: var(--t-label);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  line-height: 1.4;
  margin: 0;
}

.mono {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}

/* ---------- the one control shape ----------
   A 32px bordered square holding a plus, followed by a label. Every
   link-out and expander on the page uses it; there is no second button. */
.plus-link {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  font-size: var(--t-small);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: inherit;
}

.plus-link__box {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border: 1px solid var(--rule);
  color: var(--orchid);
  font-size: 1rem;
  line-height: 1;
  transition:
    background-color var(--d-hover) var(--ease-out),
    border-color var(--d-hover) var(--ease-out),
    color var(--d-hover) var(--ease-out);
}

.plus-link:hover .plus-link__box {
  background: var(--orchid);
  border-color: var(--orchid);
  color: var(--ink);
}

.hairline {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 0;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}