/* =====================================================================
   Design System · Base — reset, typography, layout primitives
   ===================================================================== */

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--ink);
  text-wrap: balance;
}
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); line-height: var(--lh-snug); }
h4 { font-size: var(--fs-h4); }

p { text-wrap: pretty; }

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

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

ul { list-style: none; }

/* Focus — visible, brass ring, keyboard only */
:focus-visible {
  outline: 2px solid var(--brass);
  outline-offset: 3px;
  border-radius: 3px;
}
:where(a, button, input, textarea, select):focus:not(:focus-visible) { outline: none; }

/* Selection */
::selection { background: var(--brass); color: #fff; }

/* Skip link */
.skip-link {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 200;
  background: var(--ink);
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--r-sm);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-sm);
  transition: top var(--dur) var(--ease);
}
.skip-link:focus { top: 16px; }

/* ---- Layout primitives ---- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: var(--section-y); }
.section--tight { padding-block: clamp(56px, 5vw, 96px); }

.lead {
  font-size: var(--fs-lead);
  line-height: 1.6;
  color: var(--slate-700);
  max-width: 62ch;
}

/* Eyebrow — serif italic + brass tick */
.eyebrow {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.05rem;
  color: var(--brass);
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  margin-bottom: 1.1rem;
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: currentColor;
  flex-shrink: 0;
}

/* Section header pattern (eyebrow + h2 + optional lead), reused everywhere */
.sec-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-6);
}
.sec-head__intro { max-width: 30ch; }

/* Utility */
.measure { max-width: 22ch; }
.center  { text-align: center; }
.on-dark { color: #fff; }
.on-dark .eyebrow { color: var(--brass-soft); }

/* Reveal-on-scroll (progressive enhancement; JS adds .is-in) */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease);
  will-change: opacity, transform;
}
.reveal.is-in { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}