/* ─────────────────────────────────────────────────────────────────────
   RESET + BASE
   ───────────────────────────────────────────────────────────────────── */

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

html {
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  background: var(--paper);
  color: var(--ink);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  background: var(--paper);
  color: var(--ink);
  min-height: 100dvh;
  overflow-x: clip;
  position: relative;
}

img, svg, video { display: block; max-width: 100%; height: auto; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: none; cursor: pointer; }
a { color: inherit; text-decoration: none; }

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

/* Focus rings — accessibility, but understated */
:focus-visible {
  outline: 2px solid var(--phosphor);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ─── Grain texture overlay (subtle film grain over the whole page) ─── */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.5 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  opacity: var(--noise-opacity);
  pointer-events: none;
  z-index: 999;
  mix-blend-mode: multiply;
}

/* ─── Custom cursor (thin crosshair on interactive) ─── */
.has-cursor button,
.has-cursor a,
.has-cursor [data-cursor="cross"] {
  cursor: crosshair;
}

/* ─── Container ─── */
.wrap {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--gutter-x);
}

/* ─── Editorial type primitives ─── */
.display {
  font-family: var(--font-display);
  font-weight: 300;
  line-height: var(--lh-tight);
  letter-spacing: var(--tr-tight);
  font-style: italic;
}
.display-roman {
  font-family: var(--font-display);
  font-weight: 300;
  line-height: var(--lh-tight);
  letter-spacing: var(--tr-tight);
}
.mono {
  font-family: var(--font-mono);
  font-weight: 400;
  font-feature-settings: "ss01", "calt";
}
.smcp {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: var(--fs-xs);
  letter-spacing: var(--tr-wider);
  text-transform: uppercase;
}
.caption {
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  color: var(--sub);
  line-height: var(--lh-loose);
}

/* ─── Hairline rule ─── */
.rule {
  border: 0;
  height: 1px;
  background: var(--rule);
  width: 100%;
  margin: 0;
}

/* ─── Page-load reveal ─── */
.reveal {
  opacity: 0;
  transform: translateY(8px);
  animation: reveal var(--dur-slow) var(--easing-out) forwards;
  animation-delay: var(--reveal-delay, 0ms);
}
@keyframes reveal {
  to { opacity: 1; transform: translateY(0); }
}

/* ─── Stagger helpers ─── */
.stagger > * { --reveal-delay: calc(var(--i, 0) * 60ms); }

/* ─── Section spacing ─── */
section {
  padding-block: var(--gutter-y);
  position: relative;
}

/* Editorial dingbat between sections (legacy, kept for compatibility) */
.dingbat {
  display: flex;
  justify-content: center;
  align-items: center;
  font-family: var(--font-display);
  font-style: italic;
  color: var(--sub-2);
  font-size: var(--fs-lg);
  padding-block: 2rem;
  letter-spacing: 1.5em;
  text-indent: 1.5em;
}

/* Section divider with embedded GitHub CTA. Replaces all dingbats. */
.section-divider {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: clamp(0.85rem, 2.5vw, 1.75rem);
  padding-block: clamp(2rem, 4vw, 3rem);
  background: var(--paper);
  flex-wrap: wrap;
}
.section-divider__ornament {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 200;
  font-size: clamp(1.5rem, 2.5vw, 2.25rem);
  color: var(--sub-2);
  line-height: 1;
  user-select: none;
}
.section-divider__link {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: var(--tr-wider);
  text-transform: uppercase;
  color: var(--sub);
  border-bottom: 1px solid var(--rule);
  padding-block: 0.45em;
  text-decoration: none;
  transition: color var(--dur-fast) var(--easing-out),
              border-color var(--dur-fast) var(--easing-out),
              transform var(--dur-fast) var(--easing-out);
}
.section-divider__link:hover {
  color: var(--phosphor-d);
  border-bottom-color: var(--phosphor-d);
  transform: translateY(-1px);
}
.section-divider__link .ext {
  color: var(--phosphor-d);
  margin-left: 0.1em;
}

/* Inverted variant — for dark sections (Numbers) where bg = ink */
.section-divider--inv {
  background: var(--ink);
}
.section-divider--inv .section-divider__ornament { color: var(--sub-2); }
.section-divider--inv .section-divider__link {
  color: var(--paper);
  border-bottom-color: rgba(245,242,234,0.25);
}
.section-divider--inv .section-divider__link:hover {
  color: var(--phosphor);
  border-bottom-color: var(--phosphor);
}
.section-divider--inv .section-divider__link .ext { color: var(--phosphor); }

/* ─── Print-friendly fallback (graceful) ─── */
@media print {
  body::before { display: none; }
  section { padding-block: 1rem; page-break-inside: avoid; }
}