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

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

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

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

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

h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: var(--lh-tight);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.01em;
  color: var(--ink);
}
h1 { font-size: var(--fs-display-xl); }
h2 { font-size: var(--fs-display-l); }
h3 { font-size: var(--fs-display-m); }
h4 { font-size: var(--fs-display-s); }

p { max-width: 62ch; }
p.lead { font-size: var(--fs-body-l); color: var(--text-muted); }

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

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

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

table { border-collapse: collapse; width: 100%; }

/* Focus visibility — never suppressed, only restyled */
:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 2px;
}

/* ---- Layout primitives -------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.section {
  padding-block: var(--sp-8);
}
.section--tight { padding-block: var(--sp-6); }
.section--dark {
  background: var(--asphalt);
  color: var(--paper);
}
.section--dark h1, .section--dark h2, .section--dark h3, .section--dark h4 {
  color: var(--paper);
}
.section--panel { background: var(--paper-dim); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--red);
}
.eyebrow::before {
  content: "";
  width: 1.6em;
  height: 2px;
  background: var(--red);
}

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

.skip-link {
  position: absolute;
  left: 1rem; top: -3rem;
  background: var(--ink);
  color: var(--paper);
  padding: 0.75rem 1.25rem;
  z-index: 200;
  transition: top var(--dur-fast) var(--ease-out);
  border-radius: var(--radius-s);
}
.skip-link:focus { top: 1rem; }

/* ---- Buttons -------------------------------------------------------------*/
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6em;
  padding: 0.95em 1.9em;
  font-family: var(--font-display);
  font-size: var(--fs-body-s);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  border: 2px solid transparent;
  border-radius: var(--radius-s);
  transition: transform var(--dur-fast) var(--ease-out),
              background var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }

.btn--primary {
  background: var(--red);
  color: #fff;
  border-color: var(--red);
}
.btn--primary:hover { background: var(--red-dark); border-color: var(--red-dark); }

.btn--ghost-light {
  background: transparent;
  color: #fff;
  border-color: var(--line-on-dark);
}
.btn--ghost-light:hover { border-color: #fff; }

.btn--ghost-dark {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-soft);
}
.btn--ghost-dark:hover { border-color: var(--ink); }

.btn--sm { padding: 0.7em 1.4em; font-size: 0.75rem; }

/* ---- Reveal-on-scroll (progressive enhancement, JS adds .is-visible) ---- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--dur-slow) var(--ease-out),
              transform var(--dur-slow) var(--ease-out);
}
[data-reveal].is-visible { opacity: 1; transform: none; }
.no-js [data-reveal] { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; }
}