/* ==========================================================================
   Reset, document defaults and layout primitives
   ========================================================================== */

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

* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 6.5rem;
  background-color: var(--ink-900);
}

body {
  min-height: 100svh;
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: var(--leading-normal);
  letter-spacing: var(--tracking-normal);
  color: var(--text);
  background-color: var(--paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  font-kerning: normal;
  font-variant-ligatures: common-ligatures contextual;
  hanging-punctuation: first last;
  /* Every weight in the design ships as a real font file, so block faux bold.
     Italics are allowed to synthesise since the families are upright only. */
  font-synthesis: style;
}

body.is-locked { overflow: hidden; }

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

img { height: auto; }

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

button { background: none; border: 0; cursor: pointer; }

a {
  color: inherit;
  text-decoration: none;
}

ul, ol { list-style: none; padding: 0; }

address { font-style: normal; }

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

::selection {
  background: var(--red-400);
  color: #fff;
}

/* --- Typography ---------------------------------------------------------- */

/* Headings sit on the display face. Weight and tracking tighten as size grows,
   which is how metal type behaved and how the page keeps its colour even. */
h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: var(--leading-snug);
  letter-spacing: var(--tracking-tight);
  text-wrap: balance;
  color: inherit; /* dark sections set their own colour on the container */
  font-variant-numeric: lining-nums proportional-nums;
}

h1 {
  font-size: var(--step-5);
  font-weight: 800;
  line-height: var(--leading-display);
  letter-spacing: var(--tracking-display);
}

h2 {
  font-size: var(--step-4);
  font-weight: 700;
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-display);
}

h3 {
  font-size: var(--step-2);
  line-height: var(--leading-snug);
  letter-spacing: var(--tracking-snug);
}

h4 {
  font-size: var(--step-1);
  line-height: var(--leading-title);
  letter-spacing: var(--tracking-snug);
}

p { text-wrap: pretty; max-width: 72ch; }

strong { font-weight: 600; }

/* Numerals in running text, tables and figures line up and never read as a
   letter O. Applied wherever a number carries meaning. */
.tabular,
.stat__value,
.spec-table td,
.numbered__n,
.mobile-menu__index {
  font-variant-numeric: tabular-nums slashed-zero lining-nums;
}

.lede {
  font-family: var(--font-body);
  font-size: var(--step-1);
  font-weight: 400;
  line-height: var(--leading-lede);
  letter-spacing: var(--tracking-normal);
  color: var(--text-soft);
  max-width: 58ch;
  text-wrap: pretty;
}

/* Small caps label. Supreme at 500 with open tracking, never bold body text. */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-technical);
  font-size: var(--step--2);
  font-weight: 500;
  line-height: 1;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--accent);
  font-feature-settings: 'ss01' 1;
}

.eyebrow::before {
  content: '';
  width: 1.75rem;
  height: 2px;
  background: currentColor;
  transform-origin: left;
  animation: eyebrow-in var(--dur-slow) var(--ease-out) both;
}

/* Optional refinement for the largest headlines: pull the first line flush by
   trimming the leading above the cap height. */
.optical-tight { margin-block-start: -0.12em; }

@keyframes eyebrow-in {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

.text-accent { color: var(--accent); }
.text-soft { color: var(--text-soft); }
.text-balance { text-wrap: balance; }

/* --- Layout primitives --------------------------------------------------- */

.shell {
  width: min(100% - (var(--gutter) * 2), var(--shell));
  margin-inline: auto;
}

.shell--wide { width: min(100% - (var(--gutter) * 2), var(--shell-wide)); }
.shell--narrow { width: min(100% - (var(--gutter) * 2), var(--shell-narrow)); }

.section { padding-block: var(--section-y); position: relative; }
.section--tight { padding-block: clamp(3rem, 2rem + 4vw, 5.5rem); }
.section--flush-top { padding-top: 0; }
.section--alt { background: var(--bg-alt); }

.stack > * + * { margin-top: var(--flow, 1rem); }

.grid { display: grid; gap: var(--gap, var(--space-xl)); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 26rem), 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 13.5rem), 1fr)); }

.cluster {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap, var(--space-md));
  align-items: center;
}

.section-head {
  display: grid;
  gap: var(--space-md);
  max-width: 46rem;
  margin-bottom: clamp(2.25rem, 1.5rem + 3vw, 4rem);
}

.section-head--center {
  margin-inline: auto;
  text-align: center;
  justify-items: center;
}

.section-head--split {
  max-width: none;
  grid-template-columns: minmax(0, 1fr);
  align-items: end;
}

@media (min-width: 60rem) {
  .section-head--split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: var(--space-2xl);
  }
}

/* --- Utilities ----------------------------------------------------------- */

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

.skip-link {
  position: fixed;
  top: 0;
  left: 50%;
  translate: -50% -120%;
  z-index: var(--z-veil);
  padding: 0.75rem 1.5rem;
  background: var(--red-600);
  color: #fff;
  font-weight: 600;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  transition: translate var(--dur) var(--ease-out);
}

.skip-link:focus-visible { translate: -50% 0; }

.icon-sprite { display: none; }

.i {
  width: 1.15em;
  height: 1.15em;
  flex: none;
  fill: none;
}

.chamfer {
  clip-path: polygon(
    0 0, calc(100% - var(--chamfer)) 0, 100% var(--chamfer),
    100% 100%, var(--chamfer) 100%, 0 calc(100% - var(--chamfer))
  );
}

.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-strong), transparent);
  border: 0;
}

/* --- Scroll progress and page transition veil ---------------------------- */

.scroll-progress {
  position: fixed;
  inset: 0 0 auto;
  height: 2px;
  z-index: var(--z-veil);
  pointer-events: none;
  background: transparent;
}

.scroll-progress span {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: left;
  background: linear-gradient(90deg, var(--red-600), var(--red-400), #ff8a63);
}

.page-veil {
  position: fixed;
  inset: 0;
  z-index: var(--z-veil);
  pointer-events: none;
  background: var(--ink-900);
  opacity: 0;
  visibility: hidden;
}

.js .page-veil { animation: veil-out 700ms var(--ease-out) both; }

@keyframes veil-out {
  0% { opacity: 1; visibility: visible; }
  99% { opacity: 0; visibility: visible; }
  100% { opacity: 0; visibility: hidden; }
}

body.is-leaving .page-veil {
  animation: none;
  visibility: visible;
  opacity: 1;
  transition: opacity 260ms var(--ease-in-out);
}

/* --- Scroll reveal ------------------------------------------------------- */

.js [data-reveal] {
  opacity: 0;
  transform: translate3d(0, var(--reveal-y, 22px), 0) scale(var(--reveal-s, 1));
  transition:
    opacity var(--dur-reveal) var(--ease-out),
    transform var(--dur-reveal) var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}

.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

.js [data-reveal='left'] { transform: translate3d(-28px, 0, 0); }
.js [data-reveal='right'] { transform: translate3d(28px, 0, 0); }
.js [data-reveal='scale'] { transform: scale(0.94); }
.js [data-reveal='clip'] {
  opacity: 1;
  clip-path: inset(0 100% 0 0);
  transform: none;
  transition: clip-path 1s var(--ease-out);
}
.js [data-reveal='clip'].is-visible { clip-path: inset(0 0 0 0); }

.js [data-reveal-group] > * {
  opacity: 0;
  transform: translate3d(0, 24px, 0);
  transition:
    opacity var(--dur-reveal) var(--ease-out),
    transform var(--dur-reveal) var(--ease-out);
}

.js [data-reveal-group].is-visible > * {
  opacity: 1;
  transform: none;
}

.js [data-reveal-group].is-visible > *:nth-child(1) { transition-delay: 0ms; }
.js [data-reveal-group].is-visible > *:nth-child(2) { transition-delay: 70ms; }
.js [data-reveal-group].is-visible > *:nth-child(3) { transition-delay: 140ms; }
.js [data-reveal-group].is-visible > *:nth-child(4) { transition-delay: 210ms; }
.js [data-reveal-group].is-visible > *:nth-child(5) { transition-delay: 280ms; }
.js [data-reveal-group].is-visible > *:nth-child(6) { transition-delay: 350ms; }
.js [data-reveal-group].is-visible > *:nth-child(7) { transition-delay: 420ms; }
.js [data-reveal-group].is-visible > *:nth-child(8) { transition-delay: 490ms; }

/* --- Motion preferences -------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .js [data-reveal],
  .js [data-reveal-group] > * {
    opacity: 1 !important;
    transform: none !important;
    clip-path: none !important;
  }
}