/* ============================================================
   base.css — layout primitives, grid, typography
   ============================================================ */

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

html {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: "kern" 1, "liga" 1, "calt" 1, "ss01" 1;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  font-synthesis: none;
}

/* Skip link */
.skip-link {
  position: absolute;
  left: var(--s-4); top: var(--s-4);
  padding: var(--s-2) var(--s-4);
  background: var(--ink);
  color: var(--pearl);
  font: 500 var(--fs-xs)/1 var(--font-sans);
  letter-spacing: var(--tr-meta);
  text-transform: uppercase;
  text-decoration: none;
  transform: translateY(-200%);
  transition: transform var(--dur-fast) var(--ease-std);
  z-index: 1000;
}
.skip-link:focus { transform: translateY(0); }

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  font-variation-settings: "opsz" 144, "SOFT" 20, "WONK" 0;
  line-height: var(--lh-head);
  letter-spacing: var(--tr-head);
  color: var(--ink);
  margin: 0;
  text-wrap: balance;
}

p { margin: 0; text-wrap: pretty; hanging-punctuation: first last; }

a {
  color: var(--ink);
  text-decoration: none;
  background-image: linear-gradient(var(--accent), var(--accent));
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 100% 1px;
  transition: background-size var(--dur-fast) var(--ease-std),
              color var(--dur-fast) var(--ease-std);
}
a:hover {
  color: var(--accent-deep);
  background-size: 100% 2px;
}

strong { font-weight: 600; color: var(--ink); }

small, .meta {
  font-size: var(--fs-xs);
  letter-spacing: var(--tr-meta);
  color: var(--muted);
}

.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;
}

/* Bilingual primitive */
.bilingual {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-7) var(--col-gutter);
}
@media (min-width: 64rem) {
  .bilingual {
    grid-template-columns: 1fr 1fr;
    gap: var(--s-6) var(--col-gutter);
  }
}

/* SVG-adjacent hairline rule with a gold spark at centre */
hr.rule {
  appearance: none;
  border: 0;
  height: 1px;
  margin: var(--s-9) 0;
  background: var(--hairline);
  position: relative;
  overflow: visible;
}
hr.rule::after {
  content: "";
  position: absolute;
  left: 50%; top: 50%;
  width: var(--s-5); height: 1px;
  background: var(--accent);
  transform: translate(-50%, -50%);
}

section, article {
  position: relative;
  scroll-margin-top: var(--s-8);
}

/* Numbered section headers */
section > header,
article > header {
  margin-bottom: var(--s-6);
  display: grid;
  grid-template-columns: 4rem 1fr;
  gap: var(--s-4) var(--s-5);
  align-items: baseline;
}

section > header > h2,
article > header > h2 {
  grid-column: 2;
  font-size: var(--fs-lg);
  font-weight: 500;
  letter-spacing: var(--tr-head);
  line-height: var(--lh-snug);
}

section[data-index] > header::before,
article[data-index] > header::before {
  content: attr(data-index);
  grid-column: 1;
  font-family: var(--font-mono);
  font-size: var(--fs-xxs);
  letter-spacing: var(--tr-caps);
  text-transform: uppercase;
  color: var(--accent-deep);
  padding-top: 0.35em;
  align-self: start;
}

/* Main */
main {
  display: block;
  width: 100%;
  max-width: var(--grid-max);
  margin: 0 auto;
  padding-inline: var(--page-pad);
  padding-bottom: var(--s-10);
}
main > section,
main > article { padding-block: var(--s-2); }

/* Divider between BG/EN columns */
@media (min-width: 64rem) {
  .bilingual > [lang="en"] {
    position: relative;
    padding-left: var(--col-gutter);
  }
  .bilingual > [lang="en"]::before {
    content: "";
    position: absolute;
    left: 0; top: 0.4em; bottom: 0.4em;
    width: 1px;
    background: var(--hairline);
  }
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 1px;
}

::selection { background: var(--accent); color: var(--pearl); }