/* ==========================================================================
   BASE — reset, typography, layout primitives
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1rem);
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  letter-spacing: var(--ls-body);
  color: var(--body);
  background: var(--surface);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  margin: 0;
  color: var(--ink);
  font-weight: var(--fw-semi);
  line-height: var(--lh-head);
  letter-spacing: var(--ls-head);
  text-wrap: balance;
}

h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
h4 { font-size: var(--fs-h4); font-weight: var(--fw-semi); }

p { margin: 0 0 var(--s4); max-width: var(--measure); text-wrap: pretty; }
p:last-child { margin-bottom: 0; }

a { color: var(--navy); text-decoration: none; }
a:hover { color: var(--navy-deep); }

ul, ol { margin: 0 0 var(--s4); padding-left: 1.15rem; }
li { margin-bottom: var(--s2); }
li:last-child { margin-bottom: 0; }

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

strong, b { font-weight: var(--fw-semi); color: var(--ink-soft); }

hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: var(--s8) 0;
}

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

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  background: var(--navy);
  color: #fff;
  padding: var(--s3) var(--s5);
  border-radius: 0 0 var(--r) 0;
  font-size: var(--fs-sm);
  font-weight: var(--fw-med);
}
.skip-link:focus { left: 0; color: #fff; }

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

.wrap {
  width: 100%;
  max-width: 1140px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.wrap--narrow { max-width: 820px; }
.wrap--wide   { max-width: 1320px; }

.section { padding-block: var(--section-y); }
.section--tight { padding-block: clamp(2.5rem, 1.5rem + 3vw, 4rem); }
.section--mist  { background: var(--surface-mist); }
.section--snug  { padding-top: clamp(2.25rem, 1.25rem + 3vw, 3.75rem); }
.section--sand  { background: var(--surface-sand); }
.section--ink   { background: var(--ink); color: var(--on-dark-soft); }
.section--ink h2,
.section--ink h3,
.section--ink h4 { color: var(--on-dark); }

/* A plain section following any other section used to get zero top padding,
   which crushed every heading that happened to land in that position. Only
   collapse the seam when the two share a background. */
.section:not([class*="--"]) + .section:not([class*="--"]) { padding-top: 0; }

/* ---- Type helpers -------------------------------------------------------- */

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--s2);
  margin: 0 0 var(--s4);
  font-size: var(--fs-eyebrow);
  font-weight: var(--fw-semi);
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--muted);
}
.eyebrow::before {
  content: "";
  width: 14px;
  height: 1px;
  background: var(--accent-deep);
}
.eyebrow--plain::before { display: none; }

.display {
  font-size: var(--fs-display);
  line-height: var(--lh-display);
  letter-spacing: var(--ls-display);
  font-weight: var(--fw-semi);
  color: var(--ink);
  margin: 0;
  text-wrap: balance;
}

.lead {
  font-size: var(--fs-lead);
  line-height: var(--lh-lead);
  letter-spacing: var(--ls-lead);
  color: var(--muted);
  max-width: 62ch;
}

.section-head { margin-bottom: clamp(1.75rem, 1.1rem + 2vw, 2.75rem); }
.section-head .lead { margin-top: var(--s4); }
.section-head--center { text-align: center; }
.section-head--center .lead { margin-inline: auto; }
.section-head--center .eyebrow { justify-content: center; }

.small { font-size: var(--fs-sm); }
.muted { color: var(--muted); }
.fine  { font-size: var(--fs-xs); color: var(--faint); line-height: 1.5; }

/* ---- Grid ---------------------------------------------------------------- */

.grid { display: grid; gap: var(--s6); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

@media (max-width: 900px) {
  .grid--3, .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 600px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: minmax(0, 1fr); }
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(2.5rem, 1rem + 5vw, 5.5rem);
  align-items: start;
}
@media (max-width: 880px) { .split { grid-template-columns: minmax(0, 1fr); } }

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

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity var(--t-slow) var(--ease-out),
              transform var(--t-slow) var(--ease-out);
  will-change: opacity, transform;
}
.reveal.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
}