/* Global semantics, focus, layout chrome (header, chapters, footer), buttons
   and line-art strokes. Content is fully visible without JavaScript; nothing
   here hides content pending enhancement. */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: calc(var(--header-h) + var(--s2));
  background: var(--bg);
}
@media (prefers-reduced-motion: no-preference) {
  html:not([data-motion='reduced']) { scroll-behavior: smooth; }
}
html.lenis, html.lenis body { height: auto; }
html.lenis.lenis-smooth { scroll-behavior: auto !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: var(--leading);
  font-optical-sizing: auto;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin: 0;
  text-wrap: balance;
}
p, ul, ol, dl, dd, figure { margin: 0; }
/* Long single words (URLs, names) may break rather than force sideways scrolling
   at 320px wide or with enlarged text. */
h1, h2, h3, h4, p, li, dd, dt, a, span { overflow-wrap: anywhere; }
h1, h2, h3, h4 { hyphens: manual; }
ul, ol { padding: 0; list-style: none; }
img, svg, canvas { display: block; max-width: 100%; }
button, input { font: inherit; color: inherit; }

a {
  color: inherit;
  text-decoration-color: color-mix(in srgb, var(--copper) 70%, transparent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
  transition: color var(--dur-hover) var(--ease-ui), text-decoration-color var(--dur-hover) var(--ease-ui);
}
a:hover { color: var(--copper-strong); text-decoration-color: currentColor; }

/* Focus: a copper ring with a contrasting outer halo on both themes. */
:focus-visible {
  outline: 2px solid var(--focus-inner);
  outline-offset: 2px;
  box-shadow: 0 0 0 5px var(--focus-outer);
  border-radius: 4px;
}
[tabindex='-1']:focus { outline: none; }
[tabindex='-1']:focus-visible { outline: 2px solid var(--focus-inner); outline-offset: 4px; }

::selection { background: color-mix(in srgb, var(--copper) 45%, transparent); color: var(--ink); }

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

.kicker {
  font-family: var(--font-body);
  font-size: var(--text-kicker);
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--copper);
}

.meta { color: var(--muted); font-size: var(--text-small); }

[hidden] { display: none !important; }

/* ---------- Line art ---------- */
.art { fill: none; stroke: var(--line-arch); stroke-width: var(--stroke); stroke-linecap: round; stroke-linejoin: round; overflow: visible; }
.art path, .art circle, .art rect, .art line, .art polyline { vector-effect: non-scaling-stroke; }
.art-frame { stroke: var(--line-frame); }
.art-arches, .art-antenna, .art-traces, .art-copper-extra { stroke: var(--line-arch); }
.art-waves { stroke: var(--line-wave); }
.art-ornament, .art-vias, .art-pads { stroke: var(--line-ornament); }
.art-silk { stroke: var(--line-silk); }
.art-board, .art-chip { stroke: var(--line-board); }
.art-copper-bottom { stroke: color-mix(in srgb, var(--copper) 55%, transparent); }
.art-globe { stroke: var(--line-board); }
.art-ping { stroke: var(--copper); }

.glyph { width: 1.25em; height: 1.25em; flex: none; fill: none; stroke: currentColor; stroke-width: var(--stroke); stroke-linecap: round; stroke-linejoin: round; }
.glyph path { vector-effect: non-scaling-stroke; }
.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }

/* ---------- Skip link ---------- */
.skip-link {
  position: fixed;
  top: var(--s1); left: var(--s1);
  z-index: 100;
  padding: 12px 18px;
  background: var(--surface-solid);
  color: var(--ink);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  transform: translateY(-160%);
}
.skip-link:focus { transform: none; }

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: var(--header-h);
  padding-top: env(safe-area-inset-top);
  border-bottom: 1px solid transparent;
  transition: background-color var(--dur-state) var(--ease-ui), border-color var(--dur-state) var(--ease-ui);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: var(--s3);
  height: 100%;
  max-width: calc(var(--content-max) + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: max(var(--gutter), env(safe-area-inset-left)) max(var(--gutter), env(safe-area-inset-right));
}
/* Glass after the visitor scrolls (class set from a cached threshold). With no
   JavaScript, or no backdrop-filter support, the header is simply opaque. */
html.no-js .site-header, .site-header.is-scrolled {
  background: var(--surface-solid);
  border-bottom-color: var(--border);
}
@supports ((backdrop-filter: blur(12px)) or (-webkit-backdrop-filter: blur(12px))) {
  .site-header.is-scrolled {
    background: var(--header-glass);
    -webkit-backdrop-filter: blur(14px) saturate(1.2);
    backdrop-filter: blur(14px) saturate(1.2);
  }
}
@media (prefers-contrast: more) { .site-header.is-scrolled { background: var(--surface-solid); backdrop-filter: none; } }

.home-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 1.0625rem;
  letter-spacing: 0.02em;
}
.monogram { width: 30px; height: 30px; fill: none; stroke: var(--copper); stroke-width: var(--stroke); stroke-linecap: round; stroke-linejoin: round; }
.monogram path { vector-effect: non-scaling-stroke; }

.primary-nav { margin-left: auto; }
.primary-links { display: flex; gap: var(--s1); }
.primary-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 12px;
  border-radius: var(--radius-sm);
  font-size: var(--text-small);
  letter-spacing: 0.02em;
  text-decoration: none;
  color: var(--ink-soft);
}
.primary-links a:hover { color: var(--ink); background: color-mix(in srgb, var(--ink) 6%, transparent); }
.header-tools { display: flex; align-items: center; gap: var(--s1); }
.header-resume { font-size: var(--text-small); }
/* Header labels are short and must never break inside a word (the global
   overflow-wrap: anywhere is for long text). Narrower screens drop the Pause
   label, then collapse the links behind Menu, before anything can wrap. */
.home-name, .primary-links a, .header-resume, .pause-label { white-space: nowrap; }

.pause-toggle, .menu-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  min-width: 44px;
  justify-content: center;
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: transparent;
  font-size: 0.8125rem;
  color: var(--ink-soft);
  cursor: pointer;
}
.pause-toggle:hover, .menu-toggle:hover { border-color: var(--border-strong); color: var(--ink); }
.menu-toggle { display: none; }
.pause-toggle[aria-pressed='true'] { border-color: var(--copper); color: var(--copper-strong); }

@media (max-width: 959px) {
  .pause-label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
}
@media (max-width: 599px) {
  .home-name { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
  .header-inner { gap: var(--s1); }
}
@media (max-width: 767px) {
  .primary-links a { padding: 0 8px; }
  /* With JavaScript the links collapse behind the Menu button. The class is set
     before first paint (no layout shift) and removed again if scripts never run. */
  html.nav-collapsible .menu-toggle { display: inline-flex; }
  html.nav-collapsible .primary-links {
    position: absolute;
    top: var(--header-h);
    right: var(--gutter);
    flex-direction: column;
    min-width: 200px;
    padding: var(--s1);
    background: var(--surface-solid);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow);
  }
  html.nav-collapsible .primary-nav:not(.is-open) .primary-links { display: none; }
  /* Without JavaScript the links stay out: whole words wrap onto a second row. */
  html:not(.nav-collapsible) .primary-links { flex-wrap: wrap; justify-content: flex-end; gap: 0; }
  html:not(.nav-collapsible) .primary-links a { min-height: 30px; padding: 0 6px; }
}
@media (max-width: 380px) {
  .primary-links a { padding: 0 6px; font-size: 0.875rem; }
}

/* ---------- Chapters ---------- */
.chapters {
  position: fixed;
  right: max(12px, env(safe-area-inset-right));
  top: 50%;
  z-index: 40;
  transform: translateY(-50%);
}
.chapters ol { display: flex; flex-direction: column; }
.chapter-link {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  text-decoration: none;
}
.chapter-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  border: 1.25px solid var(--muted);
  background: transparent;
  transition: transform var(--dur-hover) var(--ease-ui), background-color var(--dur-hover) var(--ease-ui), border-color var(--dur-hover) var(--ease-ui);
}
.chapter-link[aria-current='location'] .chapter-dot { background: var(--copper); border-color: var(--copper); transform: scale(1.35); }
.chapter-label {
  position: absolute;
  right: 44px;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background: var(--surface-solid);
  border: 1px solid var(--border);
  font-size: 0.8125rem;
  white-space: nowrap;
  color: var(--ink);
  opacity: 0;
  transform: translateX(6px);
  pointer-events: none;
  transition: opacity var(--dur-hover) var(--ease-ui), transform var(--dur-hover) var(--ease-ui);
}
.chapter-link:hover .chapter-label, .chapter-link:focus-visible .chapter-label { opacity: 1; transform: none; }
.chapter-link:hover .chapter-dot { border-color: var(--copper); }
@media (max-width: 859px) { .chapters { display: none; } }

/* ---------- Buttons ---------- */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--surface-solid) 60%, transparent);
  color: var(--ink);
  font-size: var(--text-small);
  font-weight: 500;
  letter-spacing: 0.01em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--dur-hover) var(--ease-ui), border-color var(--dur-hover) var(--ease-ui), color var(--dur-hover) var(--ease-ui);
}
.button:hover { border-color: var(--copper); color: var(--ink); }
.button--primary { background: var(--copper); border-color: var(--copper); color: var(--on-copper); }
.button--primary:hover { background: var(--copper-strong); border-color: var(--copper-strong); color: var(--on-copper); }
.button--small { min-height: 44px; padding: 0 16px; }
.button .glyph { width: 18px; height: 18px; }
.icon-button {
  display: inline-flex; align-items: center; gap: 8px;
  min-height: 44px; padding: 0 14px;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: transparent; font-size: 0.875rem; color: var(--ink-soft); cursor: pointer;
}
.icon-button:hover { border-color: var(--copper); color: var(--ink); }
.icon-button[aria-pressed='true'] { border-color: var(--copper); color: var(--copper-strong); }
.icon-button .glyph { width: 18px; height: 18px; }

/* ---------- Layout ---------- */
.section, .journey-head, .footer-inner {
  width: 100%;
  max-width: calc(var(--content-max) + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: max(var(--gutter), env(safe-area-inset-left)) max(var(--gutter), env(safe-area-inset-right));
}
main:focus { outline: none; }
section[id], article[id], li[id] { scroll-margin-top: calc(var(--header-h) + var(--s2)); }

/* ---------- Footer ---------- */
.site-footer {
  position: relative;
  z-index: 2;
  border-top: 1px solid var(--border);
  background: var(--bg);
  padding-block: var(--s5) calc(var(--s5) + env(safe-area-inset-bottom));
}
.footer-inner { display: grid; gap: var(--s3); grid-template-columns: 1fr; }
.footer-name { font-family: var(--font-display); font-size: 1.25rem; }
.footer-note { color: var(--muted); font-size: var(--text-small); max-width: var(--measure); }
.footer-controls { display: flex; flex-wrap: wrap; gap: var(--s3); }
@media (min-width: 860px) {
  .footer-inner { grid-template-columns: 1fr auto; align-items: start; }
  .footer-note { grid-column: 1 / -1; }
}

.segmented { display: flex; flex-wrap: wrap; align-items: center; gap: 4px; margin: 0; padding: 0; border: 0; }
.segmented legend { float: left; margin-right: 10px; font-size: 0.8125rem; color: var(--muted); letter-spacing: 0.08em; text-transform: uppercase; }
.segment { position: relative; }
.segment input { position: absolute; inset: 0; opacity: 0; margin: 0; cursor: pointer; }
.segment span {
  display: inline-flex; align-items: center; min-height: 44px; padding: 0 14px;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  font-size: 0.875rem; color: var(--ink-soft);
}
.segment input:checked + span { border-color: var(--copper); color: var(--ink); background: color-mix(in srgb, var(--copper) 16%, transparent); }
.segment input:focus-visible + span { outline: 2px solid var(--focus-inner); outline-offset: 2px; box-shadow: 0 0 0 5px var(--focus-outer); }
.segment input:hover + span { border-color: var(--border-strong); }

/* ---------- Forced colours: keep structure visible ---------- */
@media (forced-colors: active) {
  .art, .glyph, .monogram { stroke: CanvasText; }
  .chapter-dot { border-color: CanvasText; }
  .chapter-link[aria-current='location'] .chapter-dot { background: Highlight; border-color: Highlight; }
  .button, .icon-button, .segment span { border-color: ButtonText; }
  .segment input:checked + span { border-width: 3px; }
  :focus-visible { outline: 3px solid Highlight; }
}

/* ---------- Optional pointer polish (fine pointers only, added by cursor.js) ---------- */
.cursor-ring {
  position: fixed;
  left: -8px; top: -8px;
  z-index: 90;
  width: 16px; height: 16px;
  border: 1.25px solid color-mix(in srgb, var(--copper) 80%, transparent);
  border-radius: 50%;
  pointer-events: none;
  transition: width var(--dur-hover) var(--ease-ui), height var(--dur-hover) var(--ease-ui), left var(--dur-hover) var(--ease-ui), top var(--dur-hover) var(--ease-ui), border-radius var(--dur-hover) var(--ease-ui), opacity var(--dur-hover) linear;
}
.cursor-ring.is-crosshair { width: 22px; height: 22px; left: -11px; top: -11px; border-radius: 2px; border-style: dashed; }
.cursor-ring.is-hidden { opacity: 0; }
@media (forced-colors: active) { .cursor-ring { display: none; } }
.magnet-art { display: inline-flex; align-items: center; gap: inherit; pointer-events: none; }

/* Reserve the Pause control's space from first paint when scripts are on, so
   enabling it moves nothing; it stays invisible (and unfocusable) until then. */
html.js .pause-toggle[hidden] { display: inline-flex !important; visibility: hidden; }