:root {
  --color-surface: #fafafa;
  --color-surface-alt: #f0f0f0;
  --color-surface-deep: #e2e2e2;
  --color-ink: #303236;
  --color-ink-soft: #5c5f66;
  --color-ink-muted: #777b83;
  --color-line: #d6d6d7;
  --color-primary: #0b53f4;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #d9e3f9;
  --color-accent: #288703;
  --color-accent-ink: #ffffff;
  --color-highlight: #d4e5ce;
  --color-focus: #248000;
  --color-contrast-surface: #111727;
  --color-contrast-ink: #e4e5e7;
  --color-contrast-line: #3f4451;
  --color-contrast-accent: #49fa05;
  --overlay-scrim: linear-gradient(180deg, rgba(17, 23, 39, 0.35) 0%, rgba(17, 23, 39, 0.72) 55%, rgba(17, 23, 39, 0.92) 100%);
  --font-heading: "Source Han Sans SC", "Noto Sans SC", SimHei, "Microsoft YaHei", sans-serif;
  --font-body: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-mono: ui-monospace, Menlo, Consolas, monospace;
  --text-xs: 10.1px;
  --text-sm: 14.3px;
  --text-base: 17px;
  --text-lg: 24.0px;
  --text-xl: 34.0px;
  --text-2xl: 48.1px;
  --text-3xl: 68.0px;
  --text-4xl: 96.1px;
  --text-display: clamp(49px, 10.2vw, 130px);
  --text-figure: clamp(41px, 7.3vw, 94px);
  --weight-heading: 898;
  --weight-body: 400;
  --leading-body: 1.72;
  --leading-heading: 1.25;
  --tracking-heading: -0.018em;
  --radius-sm: 162px;
  --radius-md: 566px;
  --radius-lg: 969px;
  --radius-pill: 999px;
  --border-thin: 2px;
  --border-thick: 2px;
  --shadow-1: none;
  --shadow-2: none;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --container: 1180px;
  --measure: 66ch;
  --gutter: 32px;
  --section-y: 72px;
  --section-y-lg: 101px;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--weight-body);
  line-height: var(--leading-body);
  text-rendering: optimizeLegibility;
}
h1, h2, h3, h4, h5 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}
h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }
p { margin: 0 0 var(--space-3); }
a { color: var(--color-primary); text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 4px; }
a:hover { color: var(--color-accent); }
img { max-width: 100%; height: auto; display: block; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
ul, ol { margin: 0 0 var(--space-3); padding-left: 1.4em; }
li { margin: 0 0 var(--space-1); }
table { border-collapse: collapse; width: 100%; }
:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 3px; }
#main-content { scroll-margin-top: 96px; }

/* ===== Layout primitives ===== */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--space-3); }
.measure { max-width: var(--measure); }
.stack > * + * { margin-top: var(--space-3); }
.grid { display: grid; gap: var(--gutter); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid--split { grid-template-columns: minmax(0, 1.618fr) minmax(0, 1fr); }
.section { padding-block: var(--section-y); }
.section--lg { padding-block: var(--section-y-lg); }
.section--alt { background: var(--color-surface-alt); }
.section--deep { background: var(--color-contrast-surface); color: var(--color-contrast-ink); }
.section--deep h1, .section--deep h2, .section--deep h3, .section--deep h4 { color: var(--color-contrast-ink); }
.section--deep p, .section--deep li { color: var(--color-contrast-ink); }
.section--deep a { color: var(--color-contrast-accent); }
.section--deep .rule-thick, .section--deep .rule-double { border-color: var(--color-contrast-line); }
.section--deep .entry { border-bottom-color: var(--color-contrast-line); }
.section--deep .entry__title { color: var(--color-contrast-ink); }
.section--deep .entry__desc { color: color-mix(in srgb, var(--color-contrast-ink) 78%, transparent); }
.section--deep .text-note, .section--deep .entry__meta { color: color-mix(in srgb, var(--color-contrast-ink) 68%, transparent); }

/* ===== Type helpers ===== */
.display {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: 1.02;
  letter-spacing: var(--tracking-heading);
}
.figure-num {
  font-family: var(--font-mono);
  font-weight: var(--weight-heading);
  font-size: var(--text-figure);
  line-height: 1;
  letter-spacing: -0.02em;
}
.text-mono { font-family: var(--font-mono); font-size: var(--text-sm); letter-spacing: 0.06em; }
.text-note {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}
.eyebrow::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: var(--radius-pill);
  background: var(--color-primary);
  flex: 0 0 auto;
}
.num-block {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 46px;
  height: 46px;
  padding: 0 var(--space-2);
  background: var(--color-primary);
  color: var(--color-primary-ink);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  border-radius: var(--radius-sm);
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 13px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-surface-alt);
  color: var(--color-ink-soft);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.chip--primary { background: var(--color-primary-soft); border-color: var(--color-primary); color: var(--color-primary); }
.chip--accent { background: var(--color-highlight); border-color: var(--color-accent); color: var(--color-accent); }
.state-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  flex: 0 0 auto;
}

/* ===== Separators ===== */
.rule-thick { border: 0; border-top: var(--border-thick) solid var(--color-ink); height: 0; margin: var(--space-6) 0; }
.rule-double {
  border: 0;
  border-top: var(--border-thick) solid var(--color-ink);
  border-bottom: var(--border-thin) solid var(--color-ink);
  height: 6px;
  margin: var(--space-6) 0;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 12px var(--space-3);
  border: var(--border-thick) solid transparent;
  border-radius: var(--radius-pill);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  text-decoration: none;
  transition: background-color 0.12s linear, color 0.12s linear, border-color 0.12s linear;
}
.btn--primary { background: var(--color-primary); color: var(--color-primary-ink); border-color: var(--color-primary); }
.btn--primary:hover { background: var(--color-contrast-surface); color: var(--color-contrast-ink); border-color: var(--color-contrast-surface); }
.btn--accent { background: var(--color-accent); color: var(--color-accent-ink); border-color: var(--color-accent); }
.btn--accent:hover { background: var(--color-highlight); color: var(--color-ink); border-color: var(--color-accent); }
.btn--ghost { background: transparent; color: currentColor; border-color: currentColor; }
.btn--ghost:hover { background: var(--color-primary); color: var(--color-primary-ink); border-color: var(--color-primary); }

/* ===== Breadcrumbs ===== */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  align-items: center;
  list-style: none;
  margin: 0;
  padding: var(--space-3) 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}
.breadcrumbs li { margin: 0; }
.breadcrumbs li + li::before { content: "／"; margin-right: var(--space-1); color: var(--color-line); }
.breadcrumbs a { color: var(--color-ink-soft); text-decoration: none; }
.breadcrumbs a:hover { color: var(--color-primary); text-decoration: underline; }

/* ===== Skip link ===== */
.skip-link {
  position: absolute;
  left: var(--space-3);
  top: -80px;
  z-index: 100;
  padding: 10px var(--space-3);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border: var(--border-thick) solid var(--color-contrast-accent);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  text-decoration: none;
  transition: top 0.15s linear;
}
.skip-link:focus { top: var(--space-2); color: var(--color-contrast-ink); }

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: transparent;
  color: var(--color-contrast-ink);
  transition: background-color 0.18s linear;
}
.site-header.is-scrolled {
  background: var(--color-contrast-surface);
  border-bottom: var(--border-thick) solid var(--color-contrast-line);
}
.site-header__inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding: var(--space-2) var(--space-3);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  flex: 0 0 auto;
  min-width: 0;
  color: inherit;
  text-decoration: none;
}
.brand:hover { color: inherit; }
.brand__mark {
  position: relative;
  width: 32px;
  height: 32px;
  flex: 0 0 auto;
  border-radius: var(--radius-pill);
  background: var(--color-primary);
}
.brand__mark::after {
  content: "";
  position: absolute;
  right: -7px;
  top: 0;
  width: 16px;
  height: 32px;
  background: var(--color-accent);
  border-radius: 0 var(--radius-pill) var(--radius-pill) 0;
}
.brand__text { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.brand__name {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: 1;
  letter-spacing: var(--tracking-heading);
  white-space: nowrap;
}
.brand__sub {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0.7;
  white-space: nowrap;
}
.site-header__status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  margin: 0 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  opacity: 0.82;
  white-space: nowrap;
}
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-pill);
  background: var(--color-contrast-accent);
  flex: 0 0 auto;
}
.site-nav { margin-left: auto; }
.site-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  list-style: none;
  margin: 0;
  padding: 0;
}
.site-nav__item { margin: 0; }
.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 6px 0;
  border-bottom: var(--border-thick) solid transparent;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  color: inherit;
  text-decoration: none;
  transition: border-color 0.12s linear, color 0.12s linear;
}
.site-nav__link:hover { color: inherit; border-bottom-color: var(--color-contrast-accent); }
.site-nav__link[aria-current="page"] {
  color: var(--color-contrast-accent);
  border-bottom-color: var(--color-contrast-accent);
}
.nav-toggle {
  display: none;
  align-items: center;
  gap: var(--space-1);
  margin-left: auto;
  padding: 10px var(--space-2);
  border: var(--border-thick) solid currentColor;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: inherit;
  transition: background-color 0.12s linear, color 0.12s linear;
}
.nav-toggle:hover { background: var(--color-contrast-accent); color: var(--color-contrast-surface); }
.nav-toggle__bars { display: inline-flex; flex-direction: column; gap: 3px; width: 16px; }
.nav-toggle__bars i { display: block; height: 2px; background: currentColor; }
.nav-toggle__bars i:nth-child(2) { width: 68%; }
.nav-toggle__bars i:nth-child(3) { width: 84%; }
.scroll-progress {
  height: 3px;
  width: 100%;
  background: color-mix(in srgb, var(--color-contrast-line) 60%, transparent);
  opacity: 0;
  transition: opacity 0.18s linear;
}
.site-header.is-scrolled .scroll-progress { opacity: 1; }
.scroll-progress span {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: var(--color-contrast-accent);
}

@media (max-width: 1023px) {
  .nav-toggle { display: inline-flex; }
  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    margin-left: 0;
    background: var(--color-contrast-surface);
    border-top: var(--border-thick) solid var(--color-contrast-line);
    border-bottom: var(--border-thick) solid var(--color-contrast-line);
  }
  .site-nav[data-open] { display: block; }
  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-2) var(--space-3) var(--space-3);
  }
  .site-nav__item + .site-nav__item { border-top: var(--border-thin) solid var(--color-contrast-line); }
  .site-nav__link { display: block; width: 100%; padding: var(--space-2) 0; font-size: var(--text-base); }
}
@media (max-width: 767px) {
  .site-header__status { display: none; }
}
@media (max-width: 639px) {
  .brand__sub { display: none; }
}

/* ===== Footer ===== */
.site-footer {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-top: var(--border-thick) solid var(--color-contrast-line);
  font-size: var(--text-sm);
}
.site-footer__inner {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 0.75fr) 1.3fr;
  gap: var(--space-6);
  padding-block: var(--section-y);
}
.site-footer__coltitle,
.site-footer h2 {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-weight: var(--weight-body);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--color-contrast-ink) 72%, transparent);
}
.site-footer .brand { color: var(--color-contrast-ink); }
.site-footer .brand__mark { background: var(--color-primary-ink); }
.site-footer .brand__mark::after { background: var(--color-contrast-accent); }
.site-footer .brand__name { font-size: var(--text-lg); }
.site-footer__tagline {
  margin: var(--space-3) 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-contrast-accent);
}
.site-footer__note {
  margin: 0;
  max-width: 36ch;
  font-size: var(--text-sm);
  color: color-mix(in srgb, var(--color-contrast-ink) 74%, transparent);
}
.site-footer__cta { margin-top: var(--space-3); }
.site-footer__list { list-style: none; margin: 0; padding: 0; }
.site-footer__list li { margin: 0 0 var(--space-2); }
.site-footer__list a {
  color: var(--color-contrast-ink);
  text-decoration: none;
  border-bottom: var(--border-thin) solid transparent;
  transition: color 0.12s linear, border-color 0.12s linear;
}
.site-footer__list a:hover { color: var(--color-contrast-accent); border-bottom-color: var(--color-contrast-accent); }
.site-footer__list--plain li { font-family: var(--font-mono); font-size: var(--text-sm); letter-spacing: 0.04em; }
.site-footer__contact .site-footer__note { margin-top: var(--space-2); }
.site-footer__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-6);
  padding-block: var(--space-3);
  border-top: var(--border-thick) solid var(--color-contrast-line);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
}
.site-footer__meta p { margin: 0; }
.site-footer__version { color: var(--color-contrast-accent); }
.site-footer__legal { color: color-mix(in srgb, var(--color-contrast-ink) 70%, transparent); }

@media (max-width: 1023px) {
  .site-footer__inner { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-4); }
}
@media (max-width: 639px) {
  .site-footer__inner { grid-template-columns: minmax(0, 1fr); }
}

/* ===== Tag matrix ===== */
.tag-matrix {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2);
  list-style: none;
  margin: 0;
  padding: 0;
}
.tag-matrix > li { margin: 0; }
.tag-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border: var(--border-thick) solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  color: var(--color-ink);
  text-decoration: none;
  transition: background-color 0.12s linear, color 0.12s linear, border-color 0.12s linear;
}
.tag-card:hover, .tag-card:focus-visible {
  background: var(--color-primary);
  color: var(--color-primary-ink);
  border-color: var(--color-primary);
}
.tag-card__label { font-family: var(--font-heading); font-weight: var(--weight-heading); font-size: var(--text-base); }
.tag-card__count { font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: 0.1em; opacity: 0.75; }

/* ===== Timeline ===== */
.timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 var(--space-4);
  border-left: 4px solid var(--color-primary);
}
.timeline > li { margin: 0; }
.timeline__item { position: relative; padding-bottom: var(--space-6); }
.timeline__item::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--space-4) - 13px);
  top: 10px;
  width: 22px;
  height: 22px;
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  border: 4px solid var(--color-primary);
}
.timeline__item--current::before { border-color: var(--color-accent); background: var(--color-highlight); }
.timeline__version {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-primary);
}
.timeline__title { margin: var(--space-1) 0 var(--space-1); font-size: var(--text-lg); }
.timeline__meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

/* ===== Entry list (catalog) ===== */
.entry-list { list-style: none; margin: 0; padding: 0; border-top: var(--border-thick) solid var(--color-ink); }
.entry-list > li { margin: 0; }
.entry {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: var(--space-3);
  align-items: baseline;
  padding: var(--space-3) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}
.entry__num { font-family: var(--font-mono); font-size: var(--text-sm); letter-spacing: 0.08em; color: var(--color-primary); }
.entry__title {
  margin: 0 0 var(--space-1);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  letter-spacing: var(--tracking-heading);
  line-height: var(--leading-heading);
}
.entry__title a { color: inherit; text-decoration: none; }
.entry__title a:hover { color: var(--color-primary); }
.entry__desc { margin: 0; color: var(--color-ink-soft); }
.entry__meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  white-space: nowrap;
}

/* ===== Filter bar ===== */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  padding: var(--space-2) 0;
  border-top: var(--border-thick) solid var(--color-line);
  border-bottom: var(--border-thick) solid var(--color-line);
  margin-bottom: var(--space-4);
}
.filter-btn {
  padding: 8px var(--space-2);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  color: var(--color-ink-soft);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: background-color 0.12s linear, color 0.12s linear, border-color 0.12s linear;
}
.filter-btn:hover { background: var(--color-primary-soft); color: var(--color-ink); }
.filter-btn[aria-pressed="true"] {
  background: var(--color-primary);
  color: var(--color-primary-ink);
  border-color: var(--color-primary);
}
[data-filter-item][hidden] { display: none; }
.filter-empty {
  padding: var(--space-4) 0;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}
.filter-empty[hidden] { display: none; }

/* ===== Fold (details) ===== */
.fold { border-top: var(--border-thick) solid var(--color-ink); padding: var(--space-3) 0; }
.fold:last-of-type { border-bottom: var(--border-thick) solid var(--color-ink); }
.fold__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
  cursor: pointer;
  list-style: none;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  letter-spacing: var(--tracking-heading);
  line-height: var(--leading-heading);
}
.fold__head::-webkit-details-marker { display: none; }
.fold__head::after {
  content: "＋";
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  color: var(--color-primary);
  flex: 0 0 auto;
}
.fold[open] .fold__head::after { content: "－"; color: var(--color-accent); }
.fold__body { padding-top: var(--space-2); color: var(--color-ink-soft); }

/* ===== Anchor nav ===== */
.anchor-nav { font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: 0.1em; text-transform: uppercase; }
.anchor-nav a {
  display: block;
  padding: 9px 0;
  color: var(--color-ink-soft);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-line);
}
.anchor-nav a:hover { color: var(--color-primary); }
.anchor-nav a[aria-current="true"] { color: var(--color-primary); border-bottom-color: var(--color-primary); }

/* ===== Figures / images ===== */
.figure { position: relative; margin: 0; }
.figure__media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: var(--border-thick) solid var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--color-surface-deep);
}
.figure__media img { width: 100%; height: 100%; object-fit: cover; }
.figure__media--circle { aspect-ratio: 1 / 1; border-radius: var(--radius-pill); }
.figure__media--half { aspect-ratio: 2 / 1; border-radius: var(--radius-lg) var(--radius-lg) 0 0; }
.figure__caption {
  position: absolute;
  left: 0;
  right: auto;
  bottom: 0;
  margin: 0;
  padding: 6px var(--space-2);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.has-scrim { position: relative; }
.has-scrim::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
  pointer-events: none;
}
.has-scrim__text {
  position: absolute;
  left: var(--space-3);
  right: var(--space-3);
  bottom: var(--space-3);
  z-index: 1;
  margin: 0;
  color: var(--color-contrast-ink);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
}

/* ===== Geometry blocks ===== */
.geo { display: block; flex: 0 0 auto; }
.geo-circle { width: 160px; height: 160px; border-radius: var(--radius-pill); background: var(--color-primary); }
.geo-circle--accent { background: var(--color-accent); }
.geo-circle--deep { background: var(--color-contrast-surface); }
.geo-half { width: 180px; height: 90px; border-radius: var(--radius-lg) var(--radius-lg) 0 0; background: var(--color-accent); }
.geo-half--down { border-radius: 0 0 var(--radius-lg) var(--radius-lg); }
.geo-half--deep { background: var(--color-contrast-surface); }
.geo-square { width: 120px; height: 120px; background: var(--color-contrast-surface); }
.geo-square--accent { background: var(--color-accent); }

/* ===== Reveal motion ===== */
.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.42s ease, transform 0.42s ease;
}
.js-reveal [data-reveal].is-visible { opacity: 1; transform: none; }

/* ===== Responsive grids ===== */
@media (max-width: 1023px) {
  .grid--3, .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--split { grid-template-columns: minmax(0, 1fr); }
  .tag-matrix { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 639px) {
  :root { --section-y: 56px; --section-y-lg: 72px; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: minmax(0, 1fr); }
  .tag-matrix { grid-template-columns: minmax(0, 1fr); }
  .entry { grid-template-columns: auto minmax(0, 1fr); }
  .entry__meta { grid-column: 1 / -1; white-space: normal; }
  .timeline { padding-left: var(--space-3); }
  .timeline__item::before { left: calc(-1 * var(--space-3) - 11px); width: 18px; height: 18px; border-width: 3px; }
}

/* ===== Reduced motion ===== */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .js-reveal [data-reveal] { opacity: 1; transform: none; transition: none; }
  .scroll-progress { display: none; }
}