/* ==========================================================================
   base.css — reset, global typography, layout primitives, motion utilities
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

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

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 560;
  line-height: 1.15;
  margin: 0 0 var(--space-2);
  letter-spacing: -0.01em;
}

p { margin: 0 0 var(--space-2); }

a {
  color: var(--velvet);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}
a:hover { color: var(--velvet-soft); }

button { font: inherit; cursor: pointer; }

::selection { background: var(--brass); color: var(--ink); }

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

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

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-3);
}

.section { padding-block: var(--space-6); }
.section-tint { background: var(--paper-tint); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2) var(--space-3);
  margin-bottom: var(--space-4);
}
.section-title { font-size: var(--text-xl); margin: 0; }
.section-link {
  margin-left: auto;
  font-weight: 700;
  font-size: var(--text-sm);
  text-decoration: none;
}
.section-link:hover { text-decoration: underline; }

.eyebrow {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--brass);
  margin: 0 0 var(--space-1);
  flex-basis: 100%;
}

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

.skip-link {
  position: absolute;
  left: var(--space-2);
  top: -3rem;
  z-index: 200;
  background: var(--ink);
  color: var(--paper);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  transition: top var(--dur-fast) var(--ease-out);
}
.skip-link:focus { top: var(--space-2); }

/* ----- Motion utilities -----
   .reveal       — fades/rises when scrolled into view (JS adds .is-visible)
   .reveal-load  — staggered entrance on page load (uses --d as step index)
*/

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity var(--dur-slow) var(--ease-out),
    transform var(--dur-slow) var(--ease-out);
}
.reveal.is-visible { opacity: 1; transform: none; }

.reveal-load {
  animation: rise-in var(--dur-slow) var(--ease-out) both;
  animation-delay: calc(var(--d, 0) * 90ms);
}

@keyframes rise-in {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal, .reveal-load { opacity: 1; transform: none; animation: none; transition: none; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}