/* Late-loading overrides: wins over each page's inline <style> by source order. */

body {
  padding-top: calc(56px + clamp(1rem, 3vw, 1.5rem));
}
.back-link {
  display: none;
}

/* ── Site nav (injected by fx.js) ───────────────────────────────────── */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  height: 48px;
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 0 clamp(12px, 3vw, 32px);
  background: var(--nav-bg);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  font: 11px var(--mono);
  letter-spacing: 0.07em;
  text-transform: uppercase;
}
.site-nav .brand {
  color: var(--text-primary);
  font: 300 13px var(--display);
  letter-spacing: 0.16em;
  white-space: nowrap;
}
.site-nav .brand:hover {
  text-decoration: none;
  color: var(--accent, var(--accent-blue));
}
.site-nav nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
  flex: 1;
  min-width: 0;
}
.site-nav nav::-webkit-scrollbar {
  display: none;
}
.site-nav nav a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  padding: 6px 10px;
  white-space: nowrap;
  transition: color 0.2s;
}
.site-nav nav a::before {
  content: '';
  width: 5px;
  height: 5px;
  flex: none;
  background: var(--border-primary);
  transition:
    background 0.2s,
    box-shadow 0.2s;
}
.site-nav nav a:hover {
  color: var(--text-primary);
  text-decoration: none;
}
.site-nav nav a[aria-current='page'] {
  color: var(--text-primary);
}
.site-nav nav a[aria-current='page']::before {
  background: var(--accent, var(--accent-blue));
  box-shadow: 0 0 10px var(--accent, var(--accent-blue));
}
.site-nav .nav-end {
  display: flex;
  align-items: center;
}
.site-nav .theme-btn {
  margin-left: 0;
}

/* ── Page background ────────────────────────────────────────────────── */
[data-theme='light'] body {
  background:
    radial-gradient(1200px 700px at 70% -10%, #e4e7ff, transparent 60%),
    radial-gradient(900px 600px at 0% 100%, #efe6ff, transparent 55%);
  background-attachment: fixed;
}

/* ── Landing language ───────────────────────────────────────────────────
   One idea carried over from the constellation: no boxes. Structure comes from
   whitespace, hairlines and small glowing squares; colour is a signal, not a fill. */

/* Hero: a large light title with a bracketed kicker, like the landing h1 */
.kicker {
  max-width: min(960px, 100%);
  margin: 0 auto 0.6rem;
  color: var(--accent, var(--accent-blue));
  font-size: 11px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}
.topbar {
  align-items: flex-end;
  gap: 1.2rem 2rem;
  margin-bottom: 2.6rem;
}
.topbar h2 {
  flex: 1 1 480px;
  color: var(--text-primary);
  font: 300 clamp(26px, 3.4vw, 46px) / 1.05 var(--display);
  letter-spacing: 0.01em;
  text-transform: uppercase;
}
.topbar h2::before,
.topbar h2::after {
  content: none;
}
h1 {
  font-family: var(--display) !important;
  font-weight: 300 !important;
  text-transform: uppercase;
  letter-spacing: 0.03em !important;
  line-height: 1.1;
}
h2::before {
  content: '[ ';
  opacity: 0.55;
}
h2::after {
  content: ' ]';
  opacity: 0.55;
}
.subtitle,
.sub {
  letter-spacing: 0.04em;
}

/* Section labels: [LABEL] in the accent, as on the landing page */
h3 {
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.07em;
}
h3::before {
  content: '[';
}
h3::after {
  content: ']';
}

/* Tabs: glowing square + text, no filled pill */
body .toggle-wrap {
  gap: 26px;
  border: 0;
  border-radius: 0;
  overflow: visible;
  background: none;
}
body .toggle-wrap button {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 4px 0;
  background: none;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.07em;
}
body .toggle-wrap button::before {
  content: '';
  width: 7px;
  height: 7px;
  flex: none;
  background: var(--border-primary);
  transition:
    background 0.2s,
    box-shadow 0.2s;
}
body .toggle-wrap button:hover:not(.active) {
  background: none;
  color: var(--text-primary);
}
body .toggle-wrap button.active {
  background: none;
  box-shadow: none;
  color: var(--text-primary);
  font-weight: 400;
}
[data-theme='light'] body .toggle-wrap button.active {
  color: var(--text-primary);
}
body .toggle-wrap button.active::before {
  background: var(--accent, var(--accent-blue));
  box-shadow: 0 0 10px var(--accent, var(--accent-blue));
}

/* Surfaces: a single hairline on the left instead of a filled, rounded box */
body .card,
body .box,
body .info-box,
body .thesis-box,
body .conclusion-box,
body .desc-box,
body .equation-box,
body .pipe-box,
body .pipe-step,
body .pipeline-wrap,
body .combo-box,
body .act-card,
body .act-intro,
body .block-intro,
body .intro,
body .ds-card,
body .norm-card,
body .pattern-card,
body .stance-card,
body .stat-item,
body .spec-item,
body .op-item,
body .lab,
body .fb,
body .pb,
body .note,
body .crit-note,
body .thesis-note,
body .bpe-section,
body .bpe-step,
body .mech-section,
body .rw-section,
body .math-block,
body .w-block,
body .diagram,
body .code-block {
  background: transparent;
  border-top: 0;
  border-right: 0;
  border-bottom: 0;
  border-left: 1px solid var(--border-primary);
  border-radius: 0;
  box-shadow: none;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
  padding-left: clamp(14px, 2.4vw, 20px);
  transition:
    border-color 0.25s,
    box-shadow 0.25s;
}
body .card:hover,
body .box:hover,
body .act-card:hover,
body .ds-card:hover,
body .norm-card:hover,
body .pattern-card:hover,
body .stance-card:hover,
body .stat-item:hover,
body .pipe-step:hover {
  background: transparent;
  border-left-color: var(--accent, var(--accent-blue));
  box-shadow: -14px 0 26px -20px var(--accent, var(--accent-blue));
}
/* The phase banners set their fill and border in an inline style attribute */
body .pb {
  background: transparent !important;
  border: 0 !important;
  border-left: 1px solid var(--border-primary) !important;
  border-radius: 0 !important;
}
/* Per-phase colour stays as a signal, but as a hairline rather than a slab */
body [class*='c-'] .box {
  border-left-width: 1px;
}
/* Titles are white, as on the landing page; colour lives in the rule and the dots */
body .sname.sname,
body .c-name.c-name,
body .ds-name.ds-name {
  color: var(--text-primary);
}
/* Architecture sets each title colour inline from a dark-only palette, so it needs !important */
body .act-name {
  color: var(--text-primary) !important;
}
/* Era tabs: the era colour stays as text, the active tab gets a hairline underline */
body .era-tab {
  background: transparent;
  border: 0;
  border-radius: 0;
  padding: 6px 2px;
  margin-right: 14px;
  opacity: 0.55;
  transition: opacity 0.2s;
}
body .era-tab:hover {
  opacity: 0.9;
}
body .era-tab.active {
  opacity: 1;
  box-shadow: inset 0 -1px 0 currentColor;
}
/* Formula and code strips: a hairline, not a filled box */
body .act-formula,
body .norm-formula,
body .formula,
body .bpe-tokens {
  background: transparent;
  border: 0;
  border-left: 1px solid var(--border-secondary);
  border-radius: 0;
}
pre {
  background: transparent;
  border: 0;
  border-left: 1px solid var(--border-primary);
  border-radius: 0;
}
.tl-line {
  width: 1px;
}
.tl-dot.active {
  box-shadow: 0 0 12px var(--accent, var(--accent-blue));
}

/* ── Details ────────────────────────────────────────────────────────── */
::selection {
  background: var(--accent, var(--accent-blue));
  color: #000;
}
:focus-visible {
  outline: 1px solid var(--accent, var(--accent-blue));
  outline-offset: 3px;
  border-radius: 4px;
}
button {
  font-family: inherit;
}
* {
  scrollbar-width: thin;
  scrollbar-color: var(--border-primary) transparent;
}

/* ── Scroll reveal (class added by fx.js, so no-JS stays visible) ───── */
.js .rv {
  opacity: 0;
  transform: translateY(14px);
  transition:
    opacity 0.7s ease,
    transform 0.7s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.js .rv.rv-in {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  .js .rv {
    opacity: 1;
    transform: none;
    transition: none;
  }
  html {
    scroll-behavior: auto;
  }
}
@media (max-width: 720px) {
  .site-nav .brand {
    display: none;
  }
}