/* =============================================================
   PART PAGE - shared chrome with the home page (subset).
   External stylesheet for parts/part-NN.html (02-20).
   part-01.html retains its inline copy; this file is referenced
   by all generated Part pages (02-20).
   Per-part arc accent flips via body[data-arc="collapse"].
   ============================================================= */
:root {
  /* Dark void surface ladder */
  --void:    #0A0A0A;
  --void-2:  #0E0E0E;
  --void-3:  #131313;
  --void-4:  #181818;

  /* Foreground ladder */
  --fg:        #F3F3F3;
  --fg-2:     #C8C8C8;
  --fg-muted: #666666;
  --fg-line:  #2A2A2A;

  /* Brand signal */
  --yellow:    #FFE000;
  --pink:      #FF2D6F;
  --signal-cyan:  #00C2C7;
  --signal-violet: #A78BFA;
  --signal-green: #4ADE80;

  /* Hairlines */
  --hairline:        rgba(255,255,255,0.08);
  --hairline-strong: rgba(255,255,255,0.18);

  /* Type */
  --f-head:    "Space Grotesk", system-ui, sans-serif;
  --f-display: "Abril Fatface", "Times New Roman", serif;
  --f-mono:    "JetBrains Mono", ui-monospace, monospace;
  --f-body:    "Space Grotesk", system-ui, sans-serif;

  /* Layout */
  --max-w:     1440px;
  --gutter:    clamp(20px, 4vw, 56px);
  --section-y: clamp(36px, 5vw, 70px);

  /* Motion */
  --dur:      240ms;
  --dur-fast: 140ms;
  --ease:     cubic-bezier(0.16, 1, 0.3, 1);

  /* Global header sizes - same on every page so the fixed nav +
     search bar dimensions stay in sync across the site. */
  --nav-h:     68px;
  --header-h:  var(--nav-h);

  /* Glossary accent (shared with the home page glossary section,
     used here for the search hit bucket eyebrows). */
  --azure:     #4D8AFF;
  --azure-rgb: 77,138,255;
  --gold:      #C8A96E;

  /* Default per-part arc accent (cyan = Fractures, free).
     Overridden by [data-arc="collapse"] on <body> for Parts XIII-XX. */
  --arc-rgb: 0,194,199;
  --arc-hex: #00C2C7;
}
body[data-arc="collapse"] {
  --arc-rgb: 255,45,111;
  --arc-hex: #FF2D6F;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }
body {
  background: var(--void);
  color: var(--fg);
  font-family: var(--f-body);
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "ss01", "cv11";
  overflow-x: hidden;
}

/* Faint film grain across the whole page - same texture as the home. */
body::before {
  content: "";
  position: fixed; inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(0deg, rgba(255,255,255,0.012) 0 1px, transparent 1px 3px),
    radial-gradient(120% 70% at 50% 0%, rgba(0,0,0,0) 0%, rgba(0,0,0,0.4) 70%);
}

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

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
  position: relative;
  z-index: 1;
}

/* ===========================================================
   TOP NAV + SEARCH BAR + BREADCRUMB
   ===========================================================
   Same chrome as every other page on the site: fixed nav with all
   links + global search bar below + a thin breadcrumb row that
   anchors the visitor in the Part context.
   =========================================================== */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--nav-h);
  background: rgba(10,10,10,0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--hairline);
  z-index: 100;
}
.nav__inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 100%;
  max-width: var(--max-w); margin: 0 auto;
  padding: 0 var(--gutter);
}
.nav__brand {
  font-family: var(--f-body);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--fg);
}
.nav__links {
  display: flex; gap: 32px;
  list-style: none; padding: 0; margin: 0;
}
.nav__links a {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--fg-2);
  transition: color var(--dur-fast) var(--ease);
}
.nav__links a:hover { color: var(--yellow); }
/* Active-section highlight inherits this part's arc color, so on
   Collapse parts the Explore link reads pink, on Fractures cyan. */
.nav__links a.is-active { color: var(--arc-hex); }
.nav__cta {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--f-mono);
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.28em; text-transform: uppercase;
  color: var(--fg);
  background: var(--pink);
  padding: 12px 18px;
  transition: background var(--dur-fast) var(--ease),
              box-shadow var(--dur-fast) var(--ease);
}
.nav__cta:hover {
  background: #FF4F88;
  box-shadow: 0 0 0 1px var(--pink), 0 6px 16px -6px rgba(255,45,111,0.55);
}
.nav__cta .arr-ico { width: 14px; height: 14px; flex-shrink: 0; }
@media (max-width: 800px) { .nav__links { display: none; } }

/* ----- SEARCH BAR (persistent strip below nav) ----- */
.search-bar {
  position: fixed; top: var(--nav-h); left: 0; right: 0;
  height: var(--search-h);
  background: rgba(5,5,5,0.92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--hairline);
  z-index: 99;
}
.search-bar__inner {
  display: flex; align-items: center;
  height: 100%;
  max-width: var(--max-w); margin: 0 auto;
  padding: 0 var(--gutter);
  gap: 18px;
}
.search-bar__eyebrow {
  font-family: var(--f-mono);
  font-size: 10.5px; font-weight: 500;
  letter-spacing: 0.28em; text-transform: uppercase;
  color: var(--fg-muted);
  white-space: nowrap; flex-shrink: 0;
}
.search-bar__eyebrow .slash { color: var(--pink); margin-right: 6px; }
.search-bar__prompt {
  font-family: var(--f-mono);
  font-size: 13px; color: var(--pink);
  flex-shrink: 0; margin-right: -8px; font-weight: 500;
}
.search-bar__input {
  flex: 1; min-width: 0;
  background: transparent; border: 0; outline: 0;
  color: var(--fg);
  font-family: var(--f-mono); font-size: 13px;
  letter-spacing: 0.04em; height: 100%;
}
.search-bar__input::placeholder { color: var(--fg-muted); letter-spacing: 0.04em; text-transform: none; }
.search-bar__input::-webkit-search-cancel-button { display: none; }
.search-bar__kbd {
  font-family: var(--f-mono); font-size: 10px;
  letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--fg-muted);
  border: 1px solid var(--hairline-strong);
  padding: 4px 8px; white-space: nowrap; flex-shrink: 0;
}
.search-bar:focus-within .search-bar__eyebrow .slash { color: var(--gold); }
.search-bar:focus-within { border-bottom-color: rgba(200,169,110,0.4); }
.search-bar__results {
  position: absolute; top: var(--search-h); left: 50%;
  transform: translateX(-50%);
  width: 100%; max-width: var(--max-w);
  padding: 0 var(--gutter);
  pointer-events: none; opacity: 0;
  transition: opacity var(--dur-fast) var(--ease);
}
.search-bar.is-open .search-bar__results { opacity: 1; pointer-events: auto; }
.search-bar__results-inner {
  background: rgba(5,5,5,0.98);
  backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
  border: 1px solid var(--hairline-strong); border-top: 0;
  max-height: 60vh; overflow-y: auto;
  box-shadow: 0 30px 80px -20px rgba(0,0,0,0.9);
}
.search-bar__results-empty {
  padding: 18px 22px;
  font-family: var(--f-mono); font-size: 11px;
  letter-spacing: 0.24em; text-transform: uppercase;
  color: var(--fg-muted);
}
.search-bar__results-empty .slash { color: var(--pink); margin-right: 8px; }
.search-bar__results-meta {
  padding: 12px 22px;
  font-family: var(--f-mono); font-size: 9.5px;
  letter-spacing: 0.28em; text-transform: uppercase;
  color: var(--fg-muted);
  border-bottom: 1px solid var(--hairline);
}
.search-bar__results-meta b { color: var(--yellow); font-weight: 500; }
.search-hit {
  display: grid;
  grid-template-columns: 200px 1fr auto;
  gap: 24px; align-items: baseline;
  padding: 14px 22px;
  border-bottom: 1px solid var(--hairline);
  text-decoration: none; color: var(--fg);
  transition: background var(--dur-fast) var(--ease);
}
.search-hit:last-child { border-bottom: 0; }
.search-hit:hover, .search-hit.is-focused { background: rgba(255,224,0,0.06); }
.search-hit__bucket {
  font-family: var(--f-mono); font-size: 9.5px;
  letter-spacing: 0.28em; text-transform: uppercase;
  color: var(--azure); white-space: nowrap;
}
.search-hit__name {
  font-family: var(--f-head); font-weight: 700;
  font-size: 14px; letter-spacing: 0.02em;
  text-transform: uppercase; color: var(--fg); min-width: 0;
}
.search-hit__name mark { background: rgba(255,224,0,0.22); color: var(--yellow); padding: 0 2px; }
.search-hit__snip {
  font-family: var(--f-body); font-size: 12px;
  color: var(--fg-muted);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  max-width: 480px; justify-self: end;
}
@media (max-width: 800px) {
  .search-bar__eyebrow, .search-bar__kbd { display: none; }
  .search-bar__inner { gap: 10px; }
  .search-hit { grid-template-columns: 1fr; gap: 6px; padding: 14px 18px; }
  .search-hit__snip { white-space: normal; max-width: none; justify-self: start; }
}

/* ----- BREADCRUMB ROW -----
   Sits directly under the search bar. Home / Explore / Part trail
   so the visitor can hop anywhere without needing the back button. */
.crumbs {
  position: relative;
  background: rgba(10,10,10,0.4);
  border-bottom: 1px solid var(--hairline);
  margin-top: var(--header-h); /* clear the fixed nav */
}
.crumbs__inner {
  display: flex; align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: var(--max-w); margin: 0 auto;
  padding: 14px var(--gutter);
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--fg-muted);
  flex-wrap: wrap;
}
.crumbs__trail {
  display: flex; align-items: center;
  gap: 12px; flex-wrap: wrap; min-width: 0;
}
.crumbs__trail a { color: var(--fg-2); transition: color var(--dur-fast) var(--ease); }
.crumbs__trail a:hover { color: var(--arc-hex); }
.crumbs__trail .sep { color: var(--fg-line); }
.crumbs__trail .active { color: var(--arc-hex); }
.crumbs__back {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--fg-2);
}
.crumbs__back .arr { transition: transform var(--dur-fast) var(--ease); display: inline-block; }
.crumbs__back:hover { color: var(--arc-hex); }
.crumbs__back:hover .arr { transform: translateX(-4px); }
.crumbs__here {
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: 0.26em;
  color: var(--fg-2);
}
.crumbs__here .num { color: var(--arc-hex); margin-right: 6px; font-weight: 700; }

/* ===========================================================
   HERO - full-width slab. No cover art; the Part numeral + title
   carry it. Centered glow bleeds behind the title.
   =========================================================== */
.part-hero {
  padding: clamp(56px, 8vw, 120px) 0 clamp(52px, 6.5vw, 96px);
  position: relative;
  border-bottom: 1px solid var(--hairline);
}
.part-hero__inner {
  position: relative;
  display: flex; flex-direction: column;
  align-items: flex-start;
  gap: 0;
  max-width: 1000px;
}
/* Strong centered radial bloom behind the title - same recipe as
   the FRACTURE / COLLAPSE banners on the home page. Breathes on a
   slow cycle. Cyan for free parts, pink for collapses (the
   accent flips via --arc-rgb on <body data-arc="collapse">). */
.part-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 60% 120% at 32% 55%,
      rgba(var(--arc-rgb), 0.40) 0%,
      rgba(var(--arc-rgb), 0.20) 28%,
      rgba(var(--arc-rgb), 0.06) 58%,
      rgba(0,0,0,0) 82%);
  transform-origin: 32% 55%;
  animation: hero-bloom 4.2s ease-in-out infinite;
}
@keyframes hero-bloom {
  0%, 100% { opacity: 0.70; transform: scale(0.98); }
  50%      { opacity: 1.05; transform: scale(1.06); }
}
.part-hero__eyebrow {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: clamp(22px, 2.4vw, 32px);
  display: flex; align-items: center; gap: 12px;
  flex-wrap: wrap;
}
.part-hero__eyebrow .arc-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--arc-hex);
  box-shadow: 0 0 12px var(--arc-hex);
}
/* Plain [MIRRR] lockup inside the small eyebrow context. The chrome
   metallic treatment is reserved for larger marks (hero, footer).
   At 11px mono it washes out unreadably. Tighter letter-spacing on
   the lockup so the brackets sit right against the word. */
.part-hero__eyebrow .mirror-lockup {
  letter-spacing: 0;
  margin-left: 4px;
}
.part-hero__eyebrow .brk {
  color: var(--fg-muted);
  font-weight: 400;
}
.part-hero__numeral {
  font-family: var(--f-display);
  font-weight: 400;
  font-size: clamp(36px, 4.5vw, 64px);
  line-height: 0.95;
  color: var(--fg);
  text-transform: uppercase;
  letter-spacing: 0.01em;
  margin: 0 0 clamp(6px, 0.6vw, 12px);
}
.part-hero__title {
  font-family: var(--f-display);
  font-weight: 400;
  font-size: clamp(64px, 11.5vw, 168px);
  line-height: 0.92;
  color: var(--arc-hex);
  text-transform: uppercase;
  letter-spacing: -0.005em;
  margin: 0 0 clamp(24px, 3vw, 40px);
  text-shadow: 0 0 48px rgba(var(--arc-rgb), 0.32);
  animation: title-breathe 4.2s ease-in-out infinite;
}
.part-hero__title .lf { display: block; }
@keyframes title-breathe {
  0%, 100% { text-shadow: 0 0 40px rgba(var(--arc-rgb), 0.28); }
  50%      { text-shadow:
               0 0 68px rgba(var(--arc-rgb), 0.60),
               0 0 140px rgba(var(--arc-rgb), 0.28); }
}
@media (prefers-reduced-motion: reduce) {
  .part-hero::before, .part-hero__title { animation: none; }
}

.part-hero__count {
  display: inline-flex; align-items: center; gap: 12px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--fg-2);
  padding: 10px 16px;
  border: 1px solid rgba(var(--arc-rgb), 0.45);
  background: rgba(var(--arc-rgb), 0.06);
}
.part-hero__count .num { color: var(--arc-hex); font-weight: 700; }

/* ===========================================================
   BRAND LOCKUP - [MIRRR] chrome treatment (subset of home page)
   =========================================================== */
.brand-mirror {
  background: linear-gradient(
    178deg,
    #ffffff 0%,
    #d8dde6 22%,
    #f4f6fa 44%,
    #8c93a0 58%,
    #c8ced8 78%,
    #ffffff 100%
  );
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
          color: transparent;
  font-weight: 600;
  letter-spacing: 0.01em;
  text-shadow: 0 0 18px rgba(220,228,240,0.15);
}
.brand-mirror .brk { opacity: 0.55; font-weight: 400; }
.brand-pub {
  color: var(--fg-2);
  font-weight: 400;
  letter-spacing: 0.03em;
  font-size: 0.94em;
}

/* ===========================================================
   SECTION SHELL - reused below the hero
   =========================================================== */
.section {
  padding: var(--section-y) 0;
  border-top: 1px solid var(--hairline);
  position: relative;
}
.section--alt { background: var(--void-2); }
.section__head {
  display: flex; flex-direction: column;
  gap: 8px;
  margin-bottom: clamp(28px, 3.6vw, 48px);
}
.eyebrow {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--fg-muted);
  display: flex; align-items: center; gap: 10px;
}
.eyebrow .slash { color: var(--arc-hex); }
.eyebrow .num { color: var(--arc-hex); }
.section__title {
  font-family: var(--f-head);
  font-weight: 700;
  font-size: clamp(28px, 3.4vw, 44px);
  line-height: 1;
  letter-spacing: -0.01em;
  margin: 0;
  text-transform: uppercase;
  color: var(--fg);
}
.section__title .accent { color: var(--arc-hex); }
.section__sub {
  font-family: var(--f-body);
  font-size: clamp(14px, 1.1vw, 16px);
  color: var(--fg-muted);
  margin: 8px 0 0;
  max-width: 60ch;
  line-height: 1.55;
}

/* ===========================================================
   FRACTURE / COLLAPSE INDEX GRID
   =========================================================== */
.fractures-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(12px, 1.4vw, 20px);
}
@media (max-width: 900px) { .fractures-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .fractures-grid { grid-template-columns: 1fr; } }

.fracture-card {
  position: relative;
  display: flex; flex-direction: column;
  gap: 14px;
  padding: clamp(18px, 2vw, 24px);
  background: var(--void-3);
  border: 1px solid var(--hairline);
  text-decoration: none;
  color: var(--fg);
  transition: border-color var(--dur-fast) var(--ease),
              background var(--dur-fast) var(--ease),
              box-shadow var(--dur-fast) var(--ease),
              transform var(--dur) var(--ease);
  overflow: hidden;
  min-height: 180px;
}
.fracture-card:hover {
  border-color: var(--arc-hex);
  background:
    linear-gradient(rgba(var(--arc-rgb),0.08), rgba(var(--arc-rgb),0.08)),
    var(--void-4);
  box-shadow:
    0 0 0 1px rgba(var(--arc-rgb),0.40),
    0 26px 64px -16px rgba(var(--arc-rgb),0.45);
  transform: translateY(-3px) scale(1.008);
}
.fracture-card__top {
  display: flex; justify-content: space-between; align-items: baseline;
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
}
.fracture-card__num {
  color: var(--arc-hex);
  font-weight: 700;
}
.fracture-card__status { color: var(--fg-muted); }
.fracture-card__title {
  font-family: var(--f-head);
  font-weight: 600;
  font-size: clamp(18px, 1.6vw, 23px);
  line-height: 1.12;
  letter-spacing: -0.005em;
  color: var(--fg);
  margin: 0;
  text-transform: uppercase;
  padding-bottom: 6px;
}
/* Status indicator on each card - live (cyan) vs upcoming (muted).
   The dot picks up arc-hex so it works for both Fractures and Collapses. */
.fracture-card__status .dot {
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--fg-muted);
  margin-right: 6px;
  vertical-align: middle;
  transform: translateY(-1px);
}
.fracture-card__status--live { color: var(--arc-hex); }
.fracture-card__status--live .dot {
  background: var(--arc-hex);
  box-shadow: 0 0 8px var(--arc-hex);
}
/* When a card is "upcoming" we drop its hover affordance - it should not
   feel clickable since the destination is not built yet. */
.fracture-card[aria-disabled="true"] { cursor: not-allowed; }
.fracture-card[aria-disabled="true"]:hover {
  border-color: var(--hairline);
  background: var(--void-3);
  box-shadow: none;
  transform: none;
}
.fracture-card[aria-disabled="true"]:hover .fracture-card__cta { color: var(--fg-muted); }
.fracture-card[aria-disabled="true"]:hover .fracture-card__cta .arr { transform: none; }
.fracture-card[aria-disabled="true"] .fracture-card__title { color: var(--fg-2); }
.fracture-card__formats {
  display: flex; flex-wrap: wrap; gap: 6px;
  margin-top: auto;
}
.fmt {
  font-family: var(--f-mono);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  padding: 4px 8px;
  border: 1px solid var(--hairline-strong);
  color: var(--fg-muted);
}
.fmt--explainer { color: var(--yellow); border-color: rgba(255,224,0,0.35); }
.fmt--short     { color: var(--signal-violet); border-color: rgba(167,139,250,0.40); }
.fmt--static    { color: var(--signal-green); border-color: rgba(74,222,128,0.40); }
.fmt--podcast   { color: #FF7A29; border-color: rgba(255,122,41,0.42); }
.fracture-card__cta {
  display: inline-flex; align-items: center; gap: 6px;
  padding-top: 8px;
  border-top: 1px solid var(--hairline);
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--fg-muted);
  transition: color var(--dur-fast) var(--ease);
}
.fracture-card__cta .arr {
  display: inline-block;
  transition: transform var(--dur-fast) var(--ease);
}
.fracture-card:hover .fracture-card__cta { color: var(--arc-hex); }
.fracture-card:hover .fracture-card__cta .arr { transform: translateX(3px); }

/* ===========================================================
   PART FOOTER - prev/next part nav
   =========================================================== */
.part-foot {
  padding: clamp(48px, 6vw, 88px) 0;
  border-top: 1px solid var(--hairline);
}
.part-foot__nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
@media (max-width: 700px) {
  .part-foot__nav { grid-template-columns: 1fr; }
  .part-foot__nav > div:empty { display: none; }
}
.part-foot__link {
  display: flex; flex-direction: column; gap: 6px;
  padding: clamp(20px, 2vw, 28px);
  border: 1px solid var(--hairline);
  background: var(--void-3);
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--fg-muted);
  transition: border-color var(--dur-fast) var(--ease),
              color var(--dur-fast) var(--ease),
              background var(--dur-fast) var(--ease);
}
.part-foot__link:hover {
  border-color: var(--arc-hex);
  color: var(--fg);
  background: var(--void-4);
}
.part-foot__link .lbl {
  color: var(--fg-muted);
  font-size: 9.5px;
}
.part-foot__link .ttl {
  font-family: var(--f-head);
  font-weight: 700;
  font-size: clamp(15px, 1.4vw, 18px);
  letter-spacing: 0;
  text-transform: none;
  color: var(--fg);
}
.part-foot__link--prev { text-align: left; }
.part-foot__link--next { text-align: right; align-items: flex-end; }
.part-foot__back {
  display: block;
  margin-top: clamp(20px, 2vw, 32px);
  padding: clamp(18px, 2vw, 24px);
  text-align: center;
  border: 1px solid var(--hairline);
  background: var(--void);
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--fg-2);
  transition: border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.part-foot__back:hover {
  border-color: var(--arc-hex);
  color: var(--arc-hex);
}

/* ===========================================================
   GLOBAL FOOTER (mirrors the home page footer)
   =========================================================== */
.footer {
  border-top: 1px solid var(--hairline);
  padding: clamp(60px, 7vw, 100px) 0 40px;
  background: var(--void-2);
  position: relative;
  z-index: 1;
}
.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: clamp(32px, 5vw, 80px);
  margin-bottom: clamp(40px, 5vw, 72px);
}
@media (max-width: 900px) { .footer__grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .footer__grid { grid-template-columns: 1fr; } }
.footer__mark {
  font-family: var(--f-display);
  font-weight: 400;
  font-size: clamp(36px, 4.4vw, 56px);
  line-height: 0.92;
  margin: 0 0 18px;
  color: var(--fg);
  letter-spacing: 0.01em;
}
.footer__byline {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--fg-muted);
}
.footer__col-label {
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin: 0 0 18px;
}
.footer__col ul {
  list-style: none; padding: 0; margin: 0;
  display: flex; flex-direction: column; gap: 10px;
}
.footer__col a {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--fg-2);
  transition: color var(--dur-fast) var(--ease);
}
.footer__col a:hover { color: var(--yellow); }
.footer__bottom {
  display: flex; justify-content: space-between;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  padding-top: 24px;
  border-top: 1px solid var(--hairline);
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--fg-muted);
}
.footer__cta {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--f-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--fg);
  background: var(--pink);
  padding: 12px 18px;
  transition: background var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}
.footer__cta:hover {
  box-shadow: 0 0 0 1px var(--pink), 0 8px 24px -8px rgba(255,45,111,0.55);
}
.footer__cta .arr-ico { width: 14px; height: 14px; }
