/* Alta web: reset, type, layout, shared components (lip button, card, chip).
   Every colour comes from tokens.css (generated from docs/design/tokens.json). */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 80px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--alta-background);
  color: var(--alta-text-primary);
  font: 400 17px/26px var(--alta-font-text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: clip;
  transition: background-color var(--alta-motion-content-dur) ease, color var(--alta-motion-content-dur) ease;
}
img, svg { display: block; max-width: 100%; }
img { height: auto; }
a { color: inherit; }
h1, h2, h3, p, ol, ul, dl, dd, figure { margin: 0; }
ol, ul { padding: 0; list-style: none; }
button, input { font: inherit; color: inherit; }

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip { position: fixed; left: 16px; top: -80px; z-index: 100; padding: 12px 16px; border-radius: var(--alta-radius-md);
  background: var(--alta-surface); color: var(--alta-text-primary); text-decoration: none; border: 1.5px solid var(--alta-border); }
.skip:focus { top: 16px; }

:focus-visible { outline: 2px solid var(--alta-accent); outline-offset: 3px; border-radius: 6px; }

/* ---------- Layout ---------- */
.wrap { width: 100%; max-width: 1200px; margin-inline: auto; padding-inline: var(--alta-layout-page-inset); }
@media (min-width: 768px) { .wrap { padding-inline: 40px; } }
.wrap--narrow { max-width: 820px; }
.band { position: relative; z-index: 1; padding-block: clamp(96px, 14vh, 160px); }
main, .footer { position: relative; z-index: 1; }

/* ---------- Type ---------- */
.num { font-family: var(--alta-font-rounded); font-variant-numeric: tabular-nums; }
.eyebrow {
  font: var(--alta-type-eyebrow-weight) var(--alta-type-eyebrow-size)/var(--alta-type-eyebrow-line) var(--alta-font-rounded);
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--alta-accent-text); margin-bottom: 16px;
}
.eyebrow--sm { font-size: 13px; letter-spacing: 0.06em; color: var(--alta-text-secondary); margin-bottom: 6px; }
.display {
  font: 800 clamp(48px, 8vw, 104px)/0.98 var(--alta-font-rounded);
  letter-spacing: -0.03em; text-wrap: balance;
}
.display--s { font-size: clamp(44px, 6.4vw, 84px); }
.title {
  font: 700 clamp(32px, 4.5vw, 56px)/1.04 var(--alta-font-rounded);
  letter-spacing: -0.025em; text-wrap: balance;
}
.lede { font-size: clamp(17px, 1.5vw, 20px); line-height: 1.5; color: var(--alta-text-secondary); max-width: 34em; margin-top: 20px; text-wrap: pretty; }
.muted { color: var(--alta-text-tertiary); }
.note { margin-top: 20px; font-size: 13px; line-height: 18px; color: var(--alta-text-tertiary); }
.t-title2 { font: 700 22px/28px var(--alta-font-rounded); letter-spacing: -0.2px; }
.t-sub { font-size: 15px; line-height: 20px; }
.t-cap { font-size: 13px; line-height: 16px; }
.metric { font: 700 40px/44px var(--alta-font-rounded); letter-spacing: -0.5px; font-variant-numeric: tabular-nums; }
.unit { font-size: 0.5em; font-weight: 600; color: var(--alta-text-secondary); letter-spacing: 0; }

/* ---------- Lip button (spec 3.3 / 4.1 / 10) ----------
   Footprint = face + lip; the lip is a solid offset shadow, the face travels the
   full lip height on press, so layout never moves. Margin reserves the lip. */
.btn {
  --lip: var(--alta-lip-button-l);
  --lip-c: var(--alta-accent-lip);
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 50px; padding: 0 24px; margin-bottom: var(--lip);
  border: 0; border-radius: var(--alta-radius-lg);
  font: 600 17px/1 var(--alta-font-rounded); text-decoration: none; white-space: nowrap; cursor: pointer;
  background: var(--alta-accent); color: var(--alta-on-accent);
  box-shadow: 0 var(--lip) 0 var(--lip-c);
  transform: translateY(0);
  transition: transform var(--alta-motion-press), box-shadow var(--alta-motion-press), filter 120ms ease;
  -webkit-tap-highlight-color: transparent; user-select: none;
}
.btn--l { height: 50px; }
.btn--m { --lip: var(--alta-lip-button-m); height: 41px; padding: 0 16px; font-size: 16px; }
.btn--s { --lip: var(--alta-lip-button-s); height: 33px; padding: 0 12px; font-size: 15px; border-radius: var(--alta-radius-md); }
.btn--block { width: 100%; }
.btn--secondary { --lip-c: var(--alta-surface-lip); background: var(--alta-surface); color: var(--alta-text-primary); box-shadow: 0 var(--lip) 0 var(--lip-c), inset 0 0 0 1.5px var(--alta-border); }
.btn:active, .btn.is-pressed { transform: translateY(var(--lip)); box-shadow: 0 0 0 var(--lip-c); }
.btn--secondary:active { box-shadow: 0 0 0 var(--lip-c), inset 0 0 0 1.5px var(--alta-border); }
@media (hover: hover) and (pointer: fine) { .btn:hover { filter: brightness(1.06); } }
.btn[disabled], .btn[aria-disabled="true"] { --lip-c: var(--alta-raised-lip); background: var(--alta-surface-raised); color: var(--alta-text-tertiary); cursor: default; transform: none; }
.btn.is-loading .btn__label { visibility: hidden; }
.btn.is-loading::after { content: ""; position: absolute; width: 18px; height: 18px; border-radius: 50%; border: 2px solid currentColor; border-right-color: transparent; animation: spin 700ms linear infinite; }
.btn { position: relative; }
@keyframes spin { to { transform: rotate(360deg); } }

.link-arrow { display: inline-flex; align-items: center; gap: 6px; min-height: 44px; color: var(--alta-accent-text); font: 600 17px/1 var(--alta-font-rounded); text-decoration: none; }
.link-arrow span { transition: transform var(--alta-motion-pop); }
.link-arrow:hover span { transform: translateX(4px); }

/* ---------- Cards ---------- */
.card { background: var(--alta-surface); border: 1px solid var(--alta-border); border-radius: var(--alta-radius-card); }
.card--panel { padding: 24px; }
.card--lip { border-width: 1.5px; box-shadow: 0 var(--alta-lip-card) 0 var(--alta-surface-lip); margin-bottom: var(--alta-lip-card); }

.chip { display: inline-flex; align-items: baseline; gap: 6px; padding: 10px 14px; border-radius: var(--alta-radius-md);
  background: var(--alta-surface); border: 1.5px solid var(--alta-border); box-shadow: var(--alta-shadow-floating); }
.chip .num { font-size: 22px; font-weight: 800; }
.chip .unit { font-size: 13px; }
.dot { width: 8px; height: 8px; border-radius: var(--alta-radius-full); display: inline-block; align-self: center; }
.dot--live { background: var(--alta-live); box-shadow: 0 0 0 0 color-mix(in srgb, var(--alta-live) 60%, transparent); animation: live-pulse 1.6s ease-out infinite; }
@keyframes live-pulse { 0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--alta-live) 55%, transparent); } 100% { box-shadow: 0 0 0 8px transparent; } }

/* ---------- Reveal on scroll (JS adds .is-in). Without JS, everything is visible. ---------- */
.js .reveal { opacity: 0; transform: translateY(14px); transition: opacity var(--alta-motion-content-dur) ease, transform var(--alta-motion-content); }
.js .reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .js .reveal { transform: none; transition: opacity var(--alta-motion-reduced); }
  .dot--live { animation: none; }
  *, *::before, *::after { animation-duration: 1ms !important; animation-iteration-count: 1 !important; }
}