/* ==========================================================================
   Base — reset, typography, layout primitives
   ========================================================================== */
*,
*::before,
*::after { box-sizing: border-box; }

* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 16px);
}

body {
  min-height: 100vh;
  font-family: var(--font-inter);
  font-size: var(--text-body-sm);
  line-height: 1.5;
  letter-spacing: -0.006em;
  font-feature-settings: "calt";
  color: var(--color-charcoal);
  background: var(--color-paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

@media (min-width: 768px) {
  body { font-size: var(--text-body); letter-spacing: -0.007em; }
}

body.is-locked { overflow: hidden; }

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

input, button, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; padding: 0; }

a { color: var(--color-forest-ink); text-decoration-thickness: 1px; text-underline-offset: 3px; }

ul[role="list"], ol[role="list"] { list-style: none; padding: 0; }

p, li { text-wrap: pretty; }
h1, h2, h3, h4, h5, h6,
.display, .heading-lg, .heading, .heading-sm, .subheading, .title, .hero__title {
  text-wrap: balance;
  overflow-wrap: break-word;
  word-break: normal;
  hyphens: none;
  -webkit-hyphens: none;
  -ms-hyphens: none;
}

:focus-visible {
  outline: 2px solid var(--color-forest-ink);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection { background: var(--color-lime-voltage); color: var(--color-forest-ink); }

.skip-link {
  position: absolute;
  left: 16px;
  top: -100px;
  z-index: 1000;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  background: var(--color-forest-ink);
  color: var(--color-paper);
  font-weight: var(--fw-medium);
  text-decoration: none;
  transition: top var(--dur-base) var(--ease-out);
}
.skip-link:focus { top: 12px; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0);
  white-space: nowrap; border: 0;
}

/* ---------- Typography ---------- */
.display,
.heading-lg,
.heading {
  font-family: var(--font-display);
  font-weight: var(--fw-black);
  color: var(--color-obsidian);
  letter-spacing: -0.04em;
}

.display {
  font-size: var(--fs-display);
  line-height: 0.88;
  text-transform: uppercase;
}

.heading-lg {
  font-size: var(--fs-heading-lg);
  line-height: 0.9;
}

.heading {
  font-size: var(--fs-heading);
  line-height: 0.98;
  letter-spacing: -0.035em;
}

.heading-sm {
  font-size: var(--fs-heading-sm);
  line-height: 1.1;
  font-weight: var(--fw-bold);
  letter-spacing: -0.015em;
  color: var(--color-obsidian);
}

.subheading {
  font-size: var(--fs-subheading);
  line-height: 1.2;
  font-weight: var(--fw-bold);
  letter-spacing: -0.011em;
  color: var(--color-obsidian);
}

.title {
  font-size: var(--text-body);
  line-height: 1.3;
  font-weight: var(--fw-bold);
  letter-spacing: -0.007em;
  color: var(--color-obsidian);
}

@media (min-width: 768px) {
  .title { font-size: 22px; }
}

.lead {
  font-size: var(--fs-body-lg);
  line-height: 1.35;
  letter-spacing: -0.009em;
  color: var(--color-charcoal);
}

.muted { color: var(--color-slate); }
.caption { font-size: var(--text-caption); line-height: 1.55; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--text-caption);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-forest-ink);
}
.eyebrow::before {
  content: "";
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--color-lime-voltage);
  box-shadow: 0 0 0 3px var(--color-forest-ink);
}

.prose > * + * { margin-top: 1em; }
.prose p { max-width: 68ch; }
.prose strong { color: var(--color-obsidian); font-weight: var(--fw-semibold); }

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: calc(var(--page-max-width) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: var(--section-gap); }
.section--tight { padding-block: calc(var(--section-gap) * 0.6); }
.section--mist { background: var(--color-linen-mist); }
.section--fog { background: var(--color-fog); }
.section--dark {
  background: var(--color-forest-ink);
  color: var(--color-paper);
}
.section--dark :is(.display, .heading-lg, .heading, .heading-sm, .subheading) { color: var(--color-lime-voltage); }
.section--dark .title { color: var(--color-paper); }
.section--dark .muted { color: rgba(255, 255, 255, 0.72); }
.section--dark .eyebrow { color: var(--color-lime-voltage); }
.section--dark .eyebrow::before { box-shadow: 0 0 0 3px var(--color-spruce); }

.section-head {
  display: grid;
  gap: 16px;
  margin-bottom: clamp(32px, 5vw, 56px);
  max-width: 820px;
}
.section-head--center { margin-inline: auto; text-align: center; justify-items: center; }
.section-head--split {
  max-width: none;
  align-items: end;
}
@media (min-width: 960px) {
  .section-head--split { grid-template-columns: 1.2fr 1fr; gap: 48px; }
}

.grid { display: grid; gap: 24px; }
@media (min-width: 640px) {
  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1024px) {
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
@media (min-width: 640px) and (max-width: 1023px) {
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

.split {
  display: grid;
  gap: clamp(32px, 6vw, 80px);
  align-items: center;
}
@media (min-width: 960px) {
  .split { grid-template-columns: 1fr 1fr; }
  .split--wide-left { grid-template-columns: 1.25fr 1fr; }
  .split--wide-right { grid-template-columns: 1fr 1.25fr; }
  .split--top { align-items: start; }
}

.stack { display: grid; gap: 16px; }
.stack--lg { gap: 28px; }
.cluster { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 20px; }

/* ---------- Reveal on scroll ---------- */
@media (prefers-reduced-motion: no-preference) {
  .js [data-reveal] {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
    transition-delay: var(--reveal-delay, 0ms);
  }
  .js [data-reveal].is-visible { opacity: 1; transform: none; }
}

@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;
  }
}