/* =============================================================================
   KANMMU · v3 “SPECTRAL VECTOR” — SECONDARY PAGES
   about / archive / tools / portfolio  (+ the 404 / offline document)
   -----------------------------------------------------------------------------
   OWNER: pages-architect.  Loaded globally by space-head.html, so every rule is
   scoped to the page it belongs to:  body[data-sp-page='…'].

   LANGUAGE
   These pages are reading surfaces, not decks.  They run in document mode
   (`sp_mode: ambient`): the world stays as a fixed backdrop, the page is a
   plain scrollable document, and the whole layout is the `.sp-flat` layout at
   every width — desktop, mobile, no-JS, reduced motion.

   RULES
   · v3 tokens only (--ink-*, --paper*, --mute, --dim, --line-*, --grad, --e-out)
   · radius 0, 1px hairlines, no blur, no soft shadows
   · the gradient appears only where something is live / current / selected
   · type: H1 clamp(44,5.2vw,88) · section 32–48 · body 19 / 1.72 · mono meta 12+
   ========================================================================== */

/* =============================================================================
   0 · DOCUMENT SHELL
   ========================================================================== */
html.sp-flat body[data-sp-page='about'] .sp-track,
html.sp-flat body[data-sp-page='archive'] .sp-track,
html.sp-flat body[data-sp-page='tools'] .sp-track,
html.sp-flat body[data-sp-page='portfolio'] .sp-track {
  max-width: 1280px;
  padding-top: 0;
  padding-bottom: clamp(72px, 9vh, 112px);
  /* the reading lane: a controlled value over the live backdrop, bounded by
     two hard rules — an architectural plate, not a card */
  background: linear-gradient(180deg,
      rgba(5, 6, 10, .58) 0%,
      rgba(5, 6, 10, .74) 16%,
      rgba(5, 6, 10, .80) 56%,
      rgba(5, 6, 10, .86) 100%);
  border-inline: 1px solid var(--line-1);
}

/* stations are chapters: hairline + generous air, nothing else */
html.sp-flat body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .sp-station {
  padding-block: clamp(46px, 4.7vw, 78px);
  border-top: 1px solid var(--line-1);
  scroll-margin-top: calc(var(--hud-h) + 24px);
}
/* space.css hides every .sp-kicker span below 560px (written for the home hero,
   whose right-hand span is decorative). On the document pages the kicker IS the
   section label, so restore it — and let it wrap instead of clipping. */
body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .sp-kicker span {
  display: inline;
  margin-left: 0;
}
body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .sp-kicker > span:last-child {
  margin-left: auto;
}
body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .sp-kicker {
  margin-bottom: clamp(12px, 1.5vw, 18px);
}
@media (max-width: 560px) {
  body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .sp-kicker {
    flex-wrap: wrap;
    row-gap: 6px;
  }
}
/* The runtime's document mode addresses a section by its box top and the top
   bar is sticky, so the opening chapter carries the masthead offset itself:
   the kicker keeps its clearance whether the page is entered at the top, at a
   hash, or re-addressed by the QA hook (`__sp.go0(0)`). */
html.sp-flat body[data-sp-page='about'] .sp-track > .sp-station:first-child,
html.sp-flat body[data-sp-page='archive'] .sp-track > .sp-station:first-child,
html.sp-flat body[data-sp-page='tools'] .sp-track > .sp-station:first-child,
html.sp-flat body[data-sp-page='portfolio'] .sp-track > .sp-station:first-child {
  padding-top: clamp(112px, 8vw, 128px);
}
html.sp-flat body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .sp-station:first-child {
  border-top: 0;
  padding-top: 0;
}

/* a layer is a flow container by default; data-sp-lay picks a composition */
html.sp-flat body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .sp-layer {
  display: grid;
  gap: clamp(28px, 3vw, 44px);
  align-content: start;
}
html.sp-flat body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .sp-panel {
  width: auto !important;
  max-width: none;
  margin: 0;
  padding: 0;
  contain: none;
}

/* ---- shared type ------------------------------------------------------- */
body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) :is(.ab-display, .ar-display, .tl-display, .pf-display) {
  font-family: var(--f-display);
  font-weight: 800;
  font-stretch: 112%;
  font-size: clamp(44px, 5.2vw, 88px);
  line-height: .92;
  letter-spacing: -.045em;
  text-transform: uppercase;
  color: var(--paper);
  text-wrap: balance;
  font-feature-settings: 'kern' 1, 'liga' 1;
}
body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) :is(.ab-display, .ar-display, .tl-display, .pf-display) em {
  font-style: normal;
  color: transparent;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
}
body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) :is(.ab-display, .ar-display, .tl-display, .pf-display) [data-zh] {
  font-family: var(--f-cjk);
  font-weight: 700;
  font-stretch: 100%;
  letter-spacing: -.03em;
  text-transform: none;
  display: block;
}

body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) :is(.ab-h2, .ar-h2, .tl-h2, .pf-h2) {
  font-family: var(--f-display);
  font-weight: 700;
  font-stretch: 108%;
  font-size: clamp(30px, 3.1vw, 48px);
  line-height: .98;
  letter-spacing: -.035em;
  text-transform: uppercase;
  color: var(--paper);
  text-wrap: balance;
}
body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) :is(.ab-h2, .ar-h2, .tl-h2, .pf-h2) [data-zh] {
  font-family: var(--f-cjk);
  font-weight: 700;
  letter-spacing: -.02em;
  text-transform: none;
}

/* a display line's CJK glyphs overflow their .92em box: give the lede air */
body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) :is(.ab-display, .ar-display, .tl-display, .pf-display) + .sp-lede {
  margin-top: clamp(20px, 2.4vw, 30px);
}

/* the section header block: kicker → title → lede → rule → meta */
body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) :is(.ab-sec-head, .ar-sec-head, .tl-sec-head, .pf-sec-head) {
  max-width: 62ch;
}
body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) :is(.ab-sec-head, .ar-sec-head, .tl-sec-head, .pf-sec-head) .sp-lede {
  margin-top: 18px;
}
body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) :is(.ab-sec-head__rule, .ar-sec-head__rule, .tl-sec-head__rule, .pf-sec-head__rule) {
  margin: clamp(20px, 2.4vw, 30px) 0 0;
}

/* mono meta strip (counts, ranges) under a masthead or section head */
body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) :is(.ab-sec-head__meta, .ab-mast__meta, .pf-mast__meta, .ar-mast__meta, .tl-mast__meta) {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin-top: 16px;
  font-family: var(--f-mono);
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--mute);
  font-variant-numeric: tabular-nums;
}
body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) :is(.ab-sec-head__meta, .ab-mast__meta, .pf-mast__meta, .ar-mast__meta, .tl-mast__meta) b {
  font-weight: 500;
  color: var(--paper);
  letter-spacing: .04em;
}
body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) :is(.ab-sec-head__meta, .ab-mast__meta, .pf-mast__meta, .ar-mast__meta, .tl-mast__meta) em {
  font-style: normal;
}

/* section kicker: hard 1px base rule + mono label + right-hand index */
body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) :is(.ab-kicker, .ar-kicker, .tl-kicker, .pf-kicker) {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin: 0 0 14px;
  padding-bottom: 11px;
  border-bottom: 1px solid var(--line-1);
  font-family: var(--f-mono);
  font-size: 12px;
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mute);
  font-variant-numeric: tabular-nums;
}
body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) :is(.ab-kicker, .ar-kicker, .tl-kicker, .pf-kicker) b {
  font-weight: 400;
  color: var(--paper);
}

/* body copy on secondary pages: 19px reading size */
body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .sp-body-copy {
  font-size: 19px;
  line-height: 1.72;
  letter-spacing: .004em;
  color: var(--paper-2);
  max-width: 68ch;
}
body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .sp-body-copy + .sp-body-copy { margin-top: 16px; }
body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .sp-copy-en { font-size: 18px; line-height: 1.66; }

/* text links inside panels: draw the rule on hover, never before */
body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .ab-affil a,
body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .ab-affilblock__row a,
body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .ab-ids dd a,
body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .ar-note a,
body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .pf-credit a {
  color: var(--paper);
  border-bottom: 1px solid var(--line-2);
  transition: border-color .24s var(--e-out), color .24s var(--e-out);
}
body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .ab-affil a:hover,
body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .ab-affilblock__row a:hover,
body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .ab-ids dd a:hover,
body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .ar-note a:hover,
body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .pf-credit a:hover {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

/* competition numbers: big mono numerals, tabular */
body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .sp-num { font-family: var(--f-mono); font-variant-numeric: tabular-nums; }

/* =============================================================================
   1 · SHARED COMPOSITIONS  (data-sp-lay)
   ========================================================================== */
html.sp-flat body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .sp-layer[data-sp-lay='hero'] {
  grid-template-columns: minmax(0, 1.55fr) minmax(0, .85fr);
  column-gap: clamp(32px, 5vw, 88px);
  row-gap: clamp(28px, 3.4vw, 48px);
  align-items: start;
}
html.sp-flat body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .sp-layer[data-sp-lay='split'] {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  column-gap: clamp(30px, 4vw, 72px);
  row-gap: clamp(28px, 3.4vw, 48px);
  align-items: start;
}
html.sp-flat body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .sp-layer[data-sp-lay='grid2'] {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: clamp(26px, 3.4vw, 56px);
  row-gap: clamp(26px, 3.2vw, 44px);
  align-items: start;
}
html.sp-flat body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .sp-layer[data-sp-lay='grid3'] {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  column-gap: clamp(24px, 3vw, 48px);
  row-gap: 0;
  align-items: start;
}
html.sp-flat body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .sp-layer[data-sp-lay='stack'] {
  grid-template-columns: minmax(0, 1fr);
}

/* full-width bleed inside a 1280 lane only when asked */
html.sp-flat body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .sp-layer[data-sp-lay='wide'] {
  grid-template-columns: minmax(0, 1fr);
}

/* =============================================================================
   2 · ABOUT
   ========================================================================== */
/* overview composition: masthead across the top, statement left, identity right */
html.sp-flat body[data-sp-page='about'] .sp-layer[data-sp-lay='hero'] > .ab-mast { grid-column: 1 / -1; }
html.sp-flat body[data-sp-page='about'] .sp-layer[data-sp-lay='hero'] > .ab-statement { grid-column: 1; }
html.sp-flat body[data-sp-page='about'] .sp-layer[data-sp-lay='hero'] > .ab-ident { grid-column: 2; }
html.sp-flat body[data-sp-page='about'] .sp-layer[data-sp-lay='hero'] > .ab-affilblock { grid-column: 1 / -1; }
html.sp-flat body[data-sp-page='about'] .sp-layer[data-sp-lay='grid3'] > .ab-sec-head,
html.sp-flat body[data-sp-page='about'] .sp-layer[data-sp-lay='grid3'] > .ab-beyond { grid-column: 1 / -1; }
html.sp-flat body[data-sp-page='about'] .sp-layer[data-sp-lay='grid2'] > .ab-sec-head { grid-column: 1 / -1; }

body[data-sp-page='about'] .ab-mast .sp-display__sub {
  margin-top: 20px;
  font-family: var(--f-mono);
  font-weight: 400;
  font-size: 12.5px;
  letter-spacing: .26em;
  color: var(--mute);
  text-transform: uppercase;
}
body[data-sp-page='about'] .ab-role {
  margin-top: clamp(24px, 3vw, 36px);
  font-family: var(--f-display);
  font-weight: 500;
  font-stretch: 104%;
  font-size: clamp(20px, 1.7vw, 26px);
  line-height: 1.24;
  letter-spacing: -.015em;
  color: var(--paper);
}
body[data-sp-page='about'] .ab-role [data-zh] {
  font-family: var(--f-cjk);
  font-weight: 500;
  font-size: clamp(18px, 1.5vw, 23px);
  letter-spacing: -.01em;
}
body[data-sp-page='about'] .ab-affil {
  margin-top: 10px;
  font-family: var(--f-mono);
  font-size: 13px;
  line-height: 1.8;
  letter-spacing: .03em;
  color: var(--mute);
}
body[data-sp-page='about'] .ab-affil [data-zh] { font-family: var(--f-cjk); font-size: 15px; letter-spacing: .01em; }
body[data-sp-page='about'] .ab-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: clamp(24px, 3vw, 34px);
}
body[data-sp-page='about'] .ab-links .sp-chip {
  min-height: 34px;
  padding: 8px 13px;
  font-size: 12px;
}

/* --- statement ---------------------------------------------------------- */
body[data-sp-page='about'] .ab-statement .sp-body-copy {
  max-width: 62ch;
  font-size: 19px;
  line-height: 1.74;
  margin: 0 0 18px;
}
body[data-sp-page='about'] .ab-statement .sp-body-copy:last-child { margin-bottom: 0; }

/* --- identity plate ----------------------------------------------------- */
body[data-sp-page='about'] .ab-ident {
  display: grid;
  grid-template-columns: 132px minmax(0, 1fr);
  gap: 20px;
  padding-top: 14px;
  border-top: 1px solid var(--line-2);
}
body[data-sp-page='about'] .ab-ident__grid { display: contents; }
body[data-sp-page='about'] .ab-portrait { margin: 0; }
body[data-sp-page='about'] .ab-portrait img {
  width: 100%;
  height: auto;
  border: 1px solid var(--line-2);
  filter: grayscale(1) contrast(1.04);
}
body[data-sp-page='about'] .ab-portrait figcaption {
  margin-top: 8px;
  font-family: var(--f-mono);
  font-size: 12px;
  line-height: 1.45;
  letter-spacing: .08em;
  color: var(--dim);
}
body[data-sp-page='about'] .ab-ident__data { min-width: 0; }

body[data-sp-page='about'] .ab-stats {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  column-gap: 0;
  border-bottom: 1px solid var(--line-1);
}
body[data-sp-page='about'] .ab-stats .sp-kpi {
  padding: 12px 0 13px;
  border-top: 1px solid var(--line-1);
}
body[data-sp-page='about'] .ab-stats .sp-kpi:last-child { border-bottom: 0; }
body[data-sp-page='about'] .ab-stats .sp-kpi__v {
  font-size: clamp(30px, 2.9vw, 40px);
  font-weight: 300;
  line-height: .92;
}
body[data-sp-page='about'] .ab-stats .sp-kpi__l {
  font-size: 12.5px;
  line-height: 1.3;
  color: var(--mute);
}
body[data-sp-page='about'] .ab-stats .sp-kpi__src {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--dim);
}
body[data-sp-page='about'] .ab-slash {
  font-style: normal;
  font-weight: 200;
  color: var(--dim);
  margin: 0 1px;
}

body[data-sp-page='about'] .ab-ids {
  display: grid;
  gap: 6px;
  margin: 16px 0 0;
}
body[data-sp-page='about'] .ab-ids > div {
  display: grid;
  grid-template-columns: 86px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
}
body[data-sp-page='about'] .ab-ids dt {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--dim);
}
body[data-sp-page='about'] .ab-ids dd {
  margin: 0;
  min-width: 0;
  font-family: var(--f-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: .01em;
  color: var(--paper-2);
  overflow-wrap: anywhere;
}

/* --- advisor / location / keywords ------------------------------------- */
body[data-sp-page='about'] .ab-affilblock {
  padding-top: 4px;
}
body[data-sp-page='about'] .ab-affilblock__rows {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line-2);
  border-bottom: 1px solid var(--line-1);
}
body[data-sp-page='about'] .ab-affilblock__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 9px;
  align-items: start;
  padding: 18px 28px 20px 0;
  border-left: 1px solid var(--line-1);
  border-bottom: 0;
  padding-left: 28px;
}
body[data-sp-page='about'] .ab-affilblock__row:first-child { border-left: 0; padding-left: 0; }
body[data-sp-page='about'] .ab-affilblock__row:last-child { padding-right: 0; }
body[data-sp-page='about'] .ab-affilblock__row > .sp-label { font-size: 12px; letter-spacing: .16em; color: var(--dim); }
body[data-sp-page='about'] .ab-affilblock__row p {
  margin: 0;
  font-family: var(--f-cjk);
  font-size: 15px;
  line-height: 1.6;
  color: var(--paper-2);
}
body[data-sp-page='about'] .ab-affilblock__row p > a {
  display: inline-block;
  color: var(--paper);
  font-weight: 500;
}
body[data-sp-page='about'] .ab-affilblock__note {
  display: block;
  margin-top: 5px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mute);
}

/* --- research areas ----------------------------------------------------- */
body[data-sp-page='about'] .ab-area {
  padding: 26px 0 30px;
  border-top: 1px solid var(--line-1);
}
body[data-sp-page='about'] .ab-areas { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: clamp(28px, 4vw, 64px); }
body[data-sp-page='about'] .ab-area__no {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 10px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mute);
}
body[data-sp-page='about'] .ab-area__no b {
  font-weight: 300;
  font-size: 22px;
  letter-spacing: -.02em;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}
body[data-sp-page='about'] .ab-area .sp-h3 {
  font-size: clamp(22px, 1.9vw, 28px);
  margin-bottom: 12px;
}
body[data-sp-page='about'] .ab-area__sum {
  max-width: 52ch;
  margin: 0 0 14px;
  font-size: 18px;
  line-height: 1.7;
  color: var(--paper-2);
}
body[data-sp-page='about'] .ab-area__kw { display: flex; flex-wrap: wrap; gap: 6px 8px; }
body[data-sp-page='about'] .ab-area__kw span {
  padding: 5px 8px 4px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--mute);
  border: 1px solid var(--line-1);
}
body[data-sp-page='about'] .ab-area__rel { display: flex; flex-wrap: wrap; gap: 8px 22px; margin-top: 16px; }
body[data-sp-page='about'] .ab-rel { font-size: 12px; }

/* open-source / built tools */
body[data-sp-page='about'] .ab-built {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  column-gap: clamp(24px, 3vw, 48px);
  border-top: 1px solid var(--line-2);
  margin-top: clamp(26px, 3vw, 40px);
}
body[data-sp-page='about'] .ab-built__label {
  grid-column: 1 / -1;
  padding: 16px 0 10px;
  color: var(--mute);
}
body[data-sp-page='about'] .ab-built__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 20px;
  gap: 4px 10px;
  padding: 16px 0 18px;
  border-top: 1px solid var(--line-1);
  align-content: start;
}
body[data-sp-page='about'] .ab-built__item b {
  font-family: var(--f-cjk);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--paper);
}
body[data-sp-page='about'] .ab-built__detail {
  grid-column: 1;
  font-family: var(--f-cjk);
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--mute);
}
body[data-sp-page='about'] .ab-built__arrow {
  grid-column: 2;
  grid-row: 1;
  font-family: var(--f-mono);
  font-size: 14px;
  color: var(--dim);
  transition: color .2s, transform .3s var(--e-out);
}
body[data-sp-page='about'] .ab-built__item:hover b { color: var(--paper); }
body[data-sp-page='about'] .ab-built__item:hover .ab-built__arrow { color: var(--paper); transform: translate(2px, -2px); }

/* --- news --------------------------------------------------------------- */
body[data-sp-page='about'] .ab-news { border-top: 1px solid var(--line-2); }
body[data-sp-page='about'] .ab-news__item {
  display: grid;
  grid-template-columns: 94px minmax(0, 1fr);
  gap: 18px;
  align-items: baseline;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-1);
}
body[data-sp-page='about'] .ab-news__item time {
  font-family: var(--f-mono);
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: .06em;
  color: var(--mute);
  font-variant-numeric: tabular-nums;
}
body[data-sp-page='about'] .ab-news__item h3 {
  font-family: var(--f-cjk);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--paper-2);
}
body[data-sp-page='about'] .ab-news__item h3 em { font-style: normal; color: var(--paper); }
body[data-sp-page='about'] .ab-news__item h3 strong { font-weight: 600; color: var(--paper); }
body[data-sp-page='about'] .ab-news__item h3[data-en] { font-family: var(--f-display); font-size: 16.5px; line-height: 1.55; }

/* --- venues ------------------------------------------------------------- */
body[data-sp-page='about'] .ab-venues__list { border-top: 1px solid var(--line-2); }
body[data-sp-page='about'] .ab-venue {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 16px;
  align-items: baseline;
  padding: 13px 0;
  border-bottom: 1px solid var(--line-1);
}
body[data-sp-page='about'] .ab-venue__name {
  font-family: var(--f-cjk);
  font-size: 15px;
  line-height: 1.4;
  color: var(--paper-2);
  transition: color .2s;
}
body[data-sp-page='about'] .ab-venue__n {
  font-family: var(--f-mono);
  font-size: 13px;
  font-weight: 300;
  color: var(--mute);
  font-variant-numeric: tabular-nums;
}
body[data-sp-page='about'] .ab-venue:hover .ab-venue__name { color: var(--paper); }

/* --- publications ------------------------------------------------------- */
body[data-sp-page='about'] .ab-pubhead .ab-filters { margin-top: clamp(22px, 2.6vw, 32px); }
body[data-sp-page='about'] .ab-filters { display: flex; flex-wrap: wrap; gap: 8px; }
body[data-sp-page='about'] .ab-filter {
  min-height: 34px;
  padding: 7px 12px;
  font-size: 12px;
  cursor: pointer;
}
body[data-sp-page='about'] .ab-filter[aria-pressed='true'] {
  background: var(--paper);
  border-color: var(--paper);
  color: var(--ink-0);
}
body[data-sp-page='about'] .ab-filter[aria-pressed='true'] * { color: inherit; }
body[data-sp-page='about'] .ab-pubcount { margin-top: 16px; }
body[data-sp-page='about'] .ab-pubcount b { font-size: 15px; color: var(--paper); }

body[data-sp-page='about'] .ab-pubcol { border-top: 1px solid var(--line-2); }
body[data-sp-page='about'] .ab-pub {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
  padding: 20px 0 22px;
  border-top: 1px solid var(--line-1);
  transition: border-color .26s var(--e-out);
}
body[data-sp-page='about'] .ab-pubcol .ab-pub:first-child { border-top: 0; }
body[data-sp-page='about'] .ab-pub:hover { border-top-color: var(--line-3); }
body[data-sp-page='about'] .ab-pub__yr {
  font-family: var(--f-mono);
  font-size: 13px;
  line-height: 1.9;
  letter-spacing: .03em;
  color: var(--mute);
  font-variant-numeric: tabular-nums;
}
body[data-sp-page='about'] .ab-pub__body { min-width: 0; }
body[data-sp-page='about'] .ab-pub h3 {
  font-family: var(--f-display);
  font-size: clamp(18px, 1.4vw, 21px);
  font-weight: 500;
  line-height: 1.34;
  letter-spacing: -.012em;
  color: var(--paper);
  text-wrap: pretty;
}
body[data-sp-page='about'] .ab-pub h3 a { color: inherit; }
body[data-sp-page='about'] .ab-pub h3 a:hover { border-bottom: 1px solid var(--line-2); }
body[data-sp-page='about'] .ab-pub__venue {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 8px;
  margin: 8px 0 0;
  font-family: var(--f-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--mute);
}
body[data-sp-page='about'] .ab-pub__j { color: var(--paper-2); }
body[data-sp-page='about'] .ab-sep { color: var(--dim); }
body[data-sp-page='about'] .ab-pub__cite { color: var(--paper-2); }
body[data-sp-page='about'] .ab-pub__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 8px;
  margin-top: 12px;
}
body[data-sp-page='about'] .ab-badge {
  padding: 4px 7px 3px;
  font-family: var(--f-mono);
  font-size: 12px;
  line-height: 1.1;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--mute);
  border: 1px solid var(--line-1);
}
body[data-sp-page='about'] .ab-badge--key { color: var(--paper); border-color: var(--line-2); }
body[data-sp-page='about'] .ab-pub__acts { display: flex; flex-wrap: wrap; gap: 16px; margin-left: auto; }
body[data-sp-page='about'] .ab-pub__acts a,
body[data-sp-page='about'] .ab-pub__acts button {
  font-family: var(--f-mono);
  font-size: 12px;
  line-height: 1.2;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--mute);
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color .2s, border-color .2s;
}
body[data-sp-page='about'] .ab-pub__acts a:hover,
body[data-sp-page='about'] .ab-pub__acts button:hover { color: var(--paper); border-bottom-color: var(--paper); }
body[data-sp-page='about'] .ab-pub__acts button[aria-expanded='true'] { color: var(--paper); border-bottom-color: var(--paper); }
body[data-sp-page='about'] [data-bib-copy].is-copied { color: var(--paper); border-bottom-color: var(--paper) !important; }
body[data-sp-page='about'] [data-bib-copy].is-failed { color: var(--g-rose); border-bottom-color: var(--g-rose) !important; }
body[data-sp-page='about'] .ab-pub__note {
  margin: 10px 0 0;
  font-family: var(--f-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: .04em;
  color: var(--dim);
}
body[data-sp-page='about'] .ab-abstract {
  margin-top: 14px;
  padding: 16px 18px 16px 20px;
  border-left: 2px solid transparent;
  border-image: var(--grad) 1;
  background: rgba(6, 8, 12, .72);
}
body[data-sp-page='about'] .ab-abstract .sp-body-copy {
  max-width: 64ch;
  margin: 0 0 10px;
  font-size: 15.5px;
  line-height: 1.75;
}
body[data-sp-page='about'] .ab-abstract .sp-copy-en { font-size: 15px; line-height: 1.7; }
body[data-sp-page='about'] .ab-abstract[hidden] { display: none; }
body[data-sp-page='about'] .ab-pubfoot__copy { font-size: 14px; color: var(--mute); }

/* --- CV (education / experience) --------------------------------------- */
body[data-sp-page='about'] .ab-tlbox { padding-top: 4px; }
body[data-sp-page='about'] .ab-tlbox > .sp-h3 { font-size: clamp(20px, 1.6vw, 24px); margin-bottom: 8px; }
body[data-sp-page='about'] .ab-tl { border-top: 1px solid var(--line-2); }
body[data-sp-page='about'] .ab-tl__item {
  position: relative;
  padding: 20px 0 22px 22px;
  border-left: 1px solid var(--line-1);
}
body[data-sp-page='about'] .ab-tl__item:last-child { padding-bottom: 4px; }
body[data-sp-page='about'] .ab-tl__item.is-current { border-left-color: var(--line-3); }
body[data-sp-page='about'] .ab-tl__mark {
  position: absolute;
  left: -1px;
  top: 22px;
  width: 8px;
  height: 1px;
  background: var(--line-3);
}
body[data-sp-page='about'] .ab-tl__item.is-current .ab-tl__mark {
  width: 8px;
  height: 2px;
  background: var(--grad);
}
body[data-sp-page='about'] .ab-tl__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 16px;
}
body[data-sp-page='about'] .ab-tl__head h3 {
  font-family: var(--f-cjk);
  font-size: clamp(17px, 1.35vw, 20px);
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--paper);
}
body[data-sp-page='about'] .ab-tl__period {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mute);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}
body[data-sp-page='about'] .ab-tl__item.is-current .ab-tl__period { color: var(--paper-2); }
body[data-sp-page='about'] .ab-tl__org {
  margin-top: 6px;
  font-family: var(--f-cjk);
  font-size: 14.5px;
  line-height: 1.5;
  color: var(--mute);
}
body[data-sp-page='about'] .ab-tl__detail {
  margin-top: 6px;
  font-family: var(--f-cjk);
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--paper-2);
}
body[data-sp-page='about'] .ab-tl__loc {
  margin-top: 7px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--dim);
}

/* --- awards ------------------------------------------------------------- */
body[data-sp-page='about'] .ab-awards { border-top: 1px solid var(--line-2); }
body[data-sp-page='about'] .ab-award {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 20px;
  align-items: baseline;
  padding: 22px 0;
  border-bottom: 1px solid var(--line-1);
}
body[data-sp-page='about'] .ab-award__year {
  font-family: var(--f-mono);
  font-size: clamp(24px, 2.2vw, 30px);
  font-weight: 300;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}
body[data-sp-page='about'] .ab-award__title {
  font-family: var(--f-cjk);
  font-size: clamp(17px, 1.35vw, 20px);
  line-height: 1.5;
  color: var(--paper);
}
body[data-sp-page='about'] .ab-award__foot {
  margin-top: 18px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--dim);
}

/* continue links (also used by portfolio) */
body[data-sp-page='about'] .ab-cta__rows,
body[data-sp-page='portfolio'] .pf-continue__list { border-top: 1px solid var(--line-2); }
body[data-sp-page='about'] .ab-cta__row,
body[data-sp-page='portfolio'] .pf-continue__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 24px;
  gap: 16px;
  align-items: center;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-1);
  font-family: var(--f-cjk);
  font-size: 18px;
  color: var(--paper-2);
  transition: color .2s, padding .3s var(--e-out), border-color .3s;
}
body[data-sp-page='about'] .ab-cta__row [aria-hidden],
body[data-sp-page='portfolio'] .pf-continue__row [aria-hidden] {
  font-family: var(--f-mono);
  font-size: 14px;
  color: var(--dim);
  transition: color .2s, transform .3s var(--e-out);
}
body[data-sp-page='about'] .ab-cta__row:hover,
body[data-sp-page='portfolio'] .pf-continue__row:hover {
  color: var(--paper);
  border-bottom-color: var(--line-3);
  padding-left: 10px;
}
body[data-sp-page='about'] .ab-cta__row:hover [aria-hidden],
body[data-sp-page='portfolio'] .pf-continue__row:hover [aria-hidden] { color: var(--paper); transform: translate(2px, -2px); }

/* --- toolkit ------------------------------------------------------------ */
body[data-sp-page='about'] .ab-skill {
  padding: 22px 0 26px;
  border-top: 1px solid var(--line-2);
  border-bottom: 1px solid var(--line-1);
}
body[data-sp-page='about'] .ab-skill__no {
  margin: 0 0 14px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--mute);
}
body[data-sp-page='about'] .ab-skill .sp-h3 { font-size: clamp(19px, 1.55vw, 23px); }
body[data-sp-page='about'] .ab-skill__tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 16px; }
body[data-sp-page='about'] .ab-skill__tags span {
  padding: 6px 9px 5px;
  font-family: var(--f-mono);
  font-size: 12px;
  line-height: 1.1;
  letter-spacing: .05em;
  color: var(--paper-2);
  border: 1px solid var(--line-1);
}
body[data-sp-page='about'] .ab-beyond { padding-top: 22px; border-top: 1px solid var(--line-1); }
body[data-sp-page='about'] .ab-beyond .sp-body-copy { font-size: 17px; max-width: 66ch; margin-bottom: 18px; }
body[data-sp-page='about'] .ab-beyond__meta { display: flex; flex-wrap: wrap; gap: 14px 30px; margin: 0; }

/* --- contact ------------------------------------------------------------ */
body[data-sp-page='about'] .ab-mails { border-top: 1px solid var(--line-2); }
body[data-sp-page='about'] .ab-mail {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 24px;
  gap: 16px;
  align-items: center;
  padding: 20px 0;
  border-bottom: 1px solid var(--line-1);
  transition: padding .3s var(--e-out), border-color .3s;
}
body[data-sp-page='about'] .ab-mail__addr {
  display: block;
  font-family: var(--f-mono);
  font-size: clamp(15px, 1.35vw, 19px);
  line-height: 1.3;
  letter-spacing: .01em;
  color: var(--paper);
  overflow-wrap: anywhere;
}
body[data-sp-page='about'] .ab-mail__tag {
  display: block;
  margin-top: 7px;
  font-family: var(--f-mono);
  font-size: 12px;
  line-height: 1;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mute);
}
body[data-sp-page='about'] .ab-mail [aria-hidden] { font-family: var(--f-mono); color: var(--dim); }
body[data-sp-page='about'] .ab-mail:hover { padding-left: 10px; border-bottom-color: var(--line-3); }
body[data-sp-page='about'] .ab-mail:hover [aria-hidden] { color: var(--paper); }

body[data-sp-page='about'] .ab-profiles__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: clamp(24px, 3vw, 48px);
  border-top: 1px solid var(--line-2);
}
body[data-sp-page='about'] .ab-profiles__item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line-1);
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--paper-2);
  transition: color .2s, padding .3s var(--e-out);
}
body[data-sp-page='about'] .ab-profiles__item [aria-hidden] { color: var(--dim); }
body[data-sp-page='about'] .ab-profiles__item:hover { color: var(--paper); padding-left: 8px; }
body[data-sp-page='about'] .ab-profiles__item:hover [aria-hidden] { color: var(--paper); }

/* =============================================================================
   3 · ARCHIVE
   ========================================================================== */
/* small rhythm helpers inside composed sections */
body[data-sp-page='about'] .ab-venues { margin-top: clamp(30px, 3.6vw, 48px); }
body[data-sp-page='about'] .ab-sec-head .ab-tlbox { margin-top: clamp(26px, 3vw, 40px); }
body[data-sp-page='about'] .ab-profiles { margin-top: clamp(26px, 3vw, 40px); }

body[data-sp-page='archive'] .ar-mast .ar-display { max-width: 18ch; }
html.sp-flat body[data-sp-page='archive'] .sp-layer[data-sp-lay='grid2'] > .ar-mast,
html.sp-flat body[data-sp-page='archive'] .sp-layer[data-sp-lay='grid2'] > .ar-cloud { grid-column: 1 / -1; }
html.sp-flat body[data-sp-page='archive'] .sp-layer[data-sp-lay='year'] > .ar-ytags { grid-column: 2; }
body[data-sp-page='archive'] .ar-cloud { padding-top: 4px; }
body[data-sp-page='archive'] .ar-kicker__count { color: var(--paper); letter-spacing: .06em; }
body[data-sp-page='archive'] .ar-kicker__count b {
  font-family: var(--f-mono);
  font-size: 14px;
  font-weight: 400;
  color: var(--paper);
}
body[data-sp-page='archive'] .ar-chips { display: flex; flex-wrap: wrap; gap: 8px; }
body[data-sp-page='archive'] .ar-chip {
  min-height: 34px;
  padding: 7px 11px;
  font-size: 12px;
  cursor: pointer;
}
body[data-sp-page='archive'] .ar-chip sup {
  margin-left: 6px;
  font-size: 12px;
  letter-spacing: 0;
  opacity: .6;
  font-variant-numeric: tabular-nums;
}
body[data-sp-page='archive'] .ar-chip[aria-pressed='true'] {
  background: var(--paper);
  border-color: var(--paper);
  color: var(--ink-0);
}
body[data-sp-page='archive'] .ar-chip[aria-pressed='true'] sup { opacity: .7; }
body[data-sp-page='archive'] .ar-chips.is-collapsed .ar-chip--minor { display: none; }

/* --- search (progressive enhancement) ---------------------------------- */
body[data-sp-page='archive'] .ar-search {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  align-items: center;
  margin: 0 0 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-2);
}
body[data-sp-page='archive'] .ar-search label {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mute);
  white-space: nowrap;
}
body[data-sp-page='archive'] .ar-search input {
  width: 100%;
  min-height: 40px;
  padding: 8px 0;
  border: 0;
  border-bottom: 1px solid var(--line-2);
  border-radius: 0;
  background: transparent;
  font-family: var(--f-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--paper);
  outline: none;
}
body[data-sp-page='archive'] .ar-search input::placeholder { color: var(--dim); }
body[data-sp-page='archive'] .ar-search input:focus-visible { border-bottom-color: var(--paper); }

body[data-sp-page='archive'] .ar-more {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 18px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--line-2);
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--mute);
  transition: color .2s, border-color .2s;
}
body[data-sp-page='archive'] .ar-more:hover { color: var(--paper); border-bottom-color: var(--paper); }
body[data-sp-page='archive'] .ar-more[hidden] { display: none; }
body[data-sp-page='archive'] .ar-empty {
  margin: 18px 0 0;
  padding-left: 16px;
  border-left: 2px solid transparent;
  border-image: var(--grad) 1;
  font-family: var(--f-cjk);
  font-size: 15px;
  line-height: 1.6;
  color: var(--paper-2);
}
body[data-sp-page='archive'] .ar-empty[hidden] { display: none; }
body[data-sp-page='archive'] .ar-note {
  margin: 18px 0 0;
  font-family: var(--f-mono);
  font-size: 12px;
  line-height: 1.75;
  letter-spacing: .03em;
  color: var(--dim);
}

/* --- year index --------------------------------------------------------- */
body[data-sp-page='archive'] .ar-years__list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  border-top: 1px solid var(--line-2);
}
body[data-sp-page='archive'] .ar-year {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 24px;
  align-items: baseline;
  gap: 2px 10px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-1);
  border-right: 1px solid var(--line-1);
  padding-right: 18px;
  transition: border-color .25s;
}
body[data-sp-page='archive'] .ar-year:last-child { border-right: 0; }
body[data-sp-page='archive'] .ar-year__num {
  grid-column: 1;
  font-family: var(--f-mono);
  font-size: clamp(24px, 2.1vw, 30px);
  font-weight: 300;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}
body[data-sp-page='archive'] .ar-year__n {
  grid-column: 1;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--dim);
  font-variant-numeric: tabular-nums;
}
body[data-sp-page='archive'] .ar-year__go {
  grid-column: 2;
  grid-row: 1 / span 2;
  align-self: center;
  font-family: var(--f-mono);
  font-size: 13px;
  color: var(--dim);
  transition: color .2s, transform .3s var(--e-out);
}
body[data-sp-page='archive'] .ar-year:hover { border-bottom-color: var(--line-3); }
body[data-sp-page='archive'] .ar-year:hover .ar-year__num { color: var(--paper); }
body[data-sp-page='archive'] .ar-year:hover .ar-year__go { color: var(--paper); transform: translateY(3px); }

/* --- legend ------------------------------------------------------------- */
body[data-sp-page='archive'] .ar-legend__list { display: grid; gap: 10px; margin: 0; }
body[data-sp-page='archive'] .ar-legend__list > div {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 16px;
  align-items: baseline;
}
body[data-sp-page='archive'] .ar-legend__list dt {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--paper-2);
}
body[data-sp-page='archive'] .ar-legend__list dd {
  margin: 0;
  font-family: var(--f-cjk);
  font-size: 14px;
  line-height: 1.5;
  color: var(--mute);
}

/* --- year chapter ------------------------------------------------------- */
html.sp-flat body[data-sp-page='archive'] .sp-layer[data-sp-lay='year'] {
  grid-template-columns: minmax(0, 224px) minmax(0, 1fr);
  column-gap: clamp(28px, 4vw, 72px);
  row-gap: 0;
  align-items: start;
}
body[data-sp-page='archive'] .ar-yhead {
  padding-top: 4px;
  position: sticky;
  top: calc(var(--hud-h) + 28px);
}
body[data-sp-page='archive'] .ar-yhead__num {
  margin-top: 10px;
  font-family: var(--f-display);
  font-weight: 800;
  font-stretch: 108%;
  font-size: clamp(56px, 6vw, 88px);
  line-height: .84;
  letter-spacing: -.055em;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}
body[data-sp-page='archive'] .ar-yhead__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 18px 0 0;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--mute);
  font-variant-numeric: tabular-nums;
}
body[data-sp-page='archive'] .ar-yhead__meta b {
  font-family: var(--f-mono);
  font-size: 15px;
  font-weight: 300;
  letter-spacing: 0;
  color: var(--paper);
}
body[data-sp-page='archive'] .ar-filterstate {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-1);
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--dim);
}
body[data-sp-page='archive'] .ar-filterstate b { color: var(--paper-2); letter-spacing: .04em; }
body[data-sp-page='archive'] .ar-yhead__years { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0 0; }
body[data-sp-page='archive'] .ar-yhead__years a {
  padding: 4px 7px 3px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--mute);
  border: 1px solid var(--line-1);
  transition: color .2s, border-color .2s, background .2s;
  font-variant-numeric: tabular-nums;
}
body[data-sp-page='archive'] .ar-yhead__years a:hover { color: var(--paper); border-color: var(--line-2); }
body[data-sp-page='archive'] .ar-yhead__years a[aria-current='true'] {
  color: var(--ink-0);
  background: var(--paper);
  border-color: var(--paper);
}

/* --- post rows ---------------------------------------------------------- */
body[data-sp-page='archive'] .ar-postcol { border-top: 1px solid var(--line-2); }
body[data-sp-page='archive'] .ar-row {
  border-top: 1px solid var(--line-1);
  transition: border-color .26s var(--e-out), opacity .24s var(--e-out);
}
body[data-sp-page='archive'] .ar-row:first-child { border-top: 0; }
body[data-sp-page='archive'] .ar-row.is-fading { opacity: 0; }
body[data-sp-page='archive'] .ar-row__link {
  display: grid;
  grid-template-columns: 68px minmax(0, 1fr) 26px;
  gap: 18px;
  align-items: start;
  padding: 20px 0 21px;
  transition: background .3s var(--e-out), padding .3s var(--e-out);
}
body[data-sp-page='archive'] .ar-row time {
  font-family: var(--f-mono);
  font-size: 12.5px;
  line-height: 1.9;
  letter-spacing: .04em;
  color: var(--mute);
  font-variant-numeric: tabular-nums;
}
body[data-sp-page='archive'] .ar-row__body { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
body[data-sp-page='archive'] .ar-row__title {
  font-family: var(--f-cjk);
  font-size: clamp(19px, 1.45vw, 22px);
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: -.01em;
  color: var(--paper);
  text-wrap: pretty;
}
body[data-sp-page='archive'] .ar-row__sub {
  font-family: var(--f-cjk);
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--mute);
}
body[data-sp-page='archive'] .ar-row__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  margin-top: 2px;
  font-family: var(--f-mono);
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--dim);
}
body[data-sp-page='archive'] .ar-row__rt { white-space: nowrap; font-variant-numeric: tabular-nums; }
body[data-sp-page='archive'] .ar-row__go {
  align-self: center;
  font-family: var(--f-mono);
  font-size: 14px;
  color: var(--dim);
  transition: color .2s, transform .3s var(--e-out);
}
body[data-sp-page='archive'] .ar-row:hover { border-top-color: var(--line-3); }
body[data-sp-page='archive'] .ar-row:hover .ar-row__link {
  background: linear-gradient(90deg, rgba(255, 255, 255, .045), transparent 78%);
  padding-left: 12px;
}
body[data-sp-page='archive'] .ar-row:hover .ar-row__go { color: var(--paper); transform: translate(2px, -2px); }

/* --- per-year topic index ---------------------------------------------- */
body[data-sp-page='archive'] .ar-ytags { margin-top: clamp(28px, 3vw, 40px); }
body[data-sp-page='archive'] .ar-ytags__list { display: grid; gap: 0; border-top: 1px solid var(--line-1); }
body[data-sp-page='archive'] .ar-ytag {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 96px 34px;
  align-items: center;
  gap: 16px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line-1);
  text-align: left;
  cursor: pointer;
  transition: padding .28s var(--e-out), border-color .28s;
}
body[data-sp-page='archive'] .ar-ytag__name {
  font-family: var(--f-mono);
  font-size: 12px;
  line-height: 1.4;
  letter-spacing: .04em;
  color: var(--paper-2);
}
body[data-sp-page='archive'] .ar-ytag__bar { display: block; height: 1px; background: var(--line-1); position: relative; }
body[data-sp-page='archive'] .ar-ytag__bar i { position: absolute; left: 0; top: 0; bottom: 0; background: var(--line-3); }
body[data-sp-page='archive'] .ar-ytag__n {
  text-align: right;
  font-family: var(--f-mono);
  font-size: 12px;
  color: var(--mute);
  font-variant-numeric: tabular-nums;
}
body[data-sp-page='archive'] .ar-ytag:hover { border-bottom-color: var(--line-2); padding-left: 8px; }
body[data-sp-page='archive'] .ar-ytag:hover .ar-ytag__name { color: var(--paper); }
body[data-sp-page='archive'] .ar-ytag[aria-pressed='true'] {
  background: var(--paper);
  color: var(--ink-0);
  padding-left: 10px;
  padding-right: 10px;
  border-bottom-color: var(--paper);
}
body[data-sp-page='archive'] .ar-ytag[aria-pressed='true'] .ar-ytag__name { color: var(--ink-0); }
body[data-sp-page='archive'] .ar-ytag[aria-pressed='true'] .ar-ytag__bar { background: rgba(5, 6, 10, .3); }
body[data-sp-page='archive'] .ar-ytag[aria-pressed='true'] .ar-ytag__bar i { background: var(--ink-0); }
body[data-sp-page='archive'] .ar-ytag[aria-pressed='true'] .ar-ytag__n { color: var(--ink-0); }

body[data-sp-page='archive'] .ar-toc__row { display: none; }

/* =============================================================================
   4 · TOOLS
   ========================================================================== */
body[data-sp-page='tools'] .tl-mast .sp-lede { margin-top: 20px; max-width: 46ch; }
body[data-sp-page='tools'] .tl-mast__meta { margin-top: 22px; }

body[data-sp-page='tools'] .tl-grid { margin-top: 8px; }
body[data-sp-page='tools'] .tl-grid__inner {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line-2);
  border-left: 1px solid var(--line-1);
}
body[data-sp-page='tools'] .tl-tool {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 18px;
  min-height: 250px;
  padding: 22px 20px 18px;
  border-right: 1px solid var(--line-1);
  border-bottom: 1px solid var(--line-1);
  background: rgba(9, 11, 16, .48);
  transition: background .3s var(--e-out), border-color .3s var(--e-out);
}
body[data-sp-page='tools'] .tl-tool:hover {
  background: rgba(9, 11, 16, .88);
  border-right-color: var(--line-3);
  border-bottom-color: var(--line-3);
}
body[data-sp-page='tools'] .tl-tool__top { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
body[data-sp-page='tools'] .tl-tool .sp-tool__mark {
  min-width: 36px;
  padding: 5px 6px 4px;
  border: 1px solid var(--line-2);
  font-family: var(--f-mono);
  font-size: 12px;
  line-height: 1;
  color: var(--paper);
  text-align: center;
}
body[data-sp-page='tools'] .tl-tool__cat {
  font-family: var(--f-mono);
  font-size: 12px;
  line-height: 1.3;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--dim);
  text-align: right;
}
body[data-sp-page='tools'] .tl-tool__body h3 {
  font-family: var(--f-display);
  font-size: clamp(18px, 1.35vw, 21px);
  font-weight: 600;
  line-height: 1.22;
  letter-spacing: -.015em;
  color: var(--paper);
}
body[data-sp-page='tools'] .tl-tool__body p {
  margin-top: 8px;
  font-family: var(--f-cjk);
  font-size: 13.5px;
  line-height: 1.62;
  color: var(--mute);
}
body[data-sp-page='tools'] .tl-tool__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-top: 14px;
  border-top: 1px solid var(--line-1);
}
body[data-sp-page='tools'] .tl-tool__foot .sp-tool__tech {
  font-family: var(--f-mono);
  font-size: 12px;
  line-height: 1.4;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--dim);
}
body[data-sp-page='tools'] .tl-tool__foot [aria-hidden] {
  font-family: var(--f-mono);
  font-size: 13px;
  color: var(--dim);
  transition: color .2s, transform .3s var(--e-out);
}
body[data-sp-page='tools'] .tl-tool:hover .tl-tool__foot [aria-hidden] { color: var(--paper); transform: translate(2px, -2px); }

/* category chapter: head + two exhibits */
body[data-sp-page='tools'] .tl-head { max-width: 60ch; }
body[data-sp-page='tools'] .tl-head .ab-h2,
body[data-sp-page='tools'] .tl-head .ab-display { }
body[data-sp-page='tools'] .tl-head .sp-lede { margin-top: 18px; max-width: 52ch; }
body[data-sp-page='tools'] .tl-head__tech { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
body[data-sp-page='tools'] .tl-head__tech span {
  padding: 5px 8px 4px;
  font-family: var(--f-mono);
  font-size: 12px;
  line-height: 1.1;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--mute);
  border: 1px solid var(--line-1);
}

body[data-sp-page='tools'] .tl-exhibits {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-1);
  border: 1px solid var(--line-1);
}
body[data-sp-page='tools'] .tl-exhibit {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0;
  padding: 24px 26px 22px;
  background: rgba(9, 11, 16, .62);
}
body[data-sp-page='tools'] .tl-ex__mark {
  margin: 0;
  font-family: var(--f-mono);
  font-size: 34px;
  font-weight: 300;
  line-height: 1;
  letter-spacing: -.05em;
  color: var(--paper);
}
body[data-sp-page='tools'] .tl-ex__cat {
  margin: 10px 0 0;
  font-family: var(--f-mono);
  font-size: 12px;
  line-height: 1.2;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--dim);
}
body[data-sp-page='tools'] .tl-ex__name {
  margin: 18px 0 0;
  font-size: clamp(22px, 1.8vw, 27px);
}
body[data-sp-page='tools'] .tl-ex__desc {
  flex: 1 1 auto;
  margin: 12px 0 0;
  font-family: var(--f-cjk);
  font-size: 15px;
  line-height: 1.68;
  color: var(--paper-2);
}
body[data-sp-page='tools'] .tl-ex__tech {
  margin: 18px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line-1);
  width: 100%;
  font-family: var(--f-mono);
  font-size: 12px;
  line-height: 1.4;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--mute);
}
body[data-sp-page='tools'] .tl-ex__btn { margin-top: 18px; }
body[data-sp-page='tools'] .tl-ex__url {
  margin: 12px 0 0;
  font-family: var(--f-mono);
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: .02em;
  color: var(--dim);
  overflow-wrap: anywhere;
}

/* station index (single jump list at the top of the page) */
body[data-sp-page='tools'] .tl-stations__list { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--line-2); }
body[data-sp-page='tools'] .tl-station {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-1);
  border-right: 1px solid var(--line-1);
  padding-right: 16px;
  font-family: var(--f-cjk);
  font-size: 15px;
  line-height: 1.3;
  color: var(--paper-2);
  transition: color .2s, border-color .2s;
}
body[data-sp-page='tools'] .tl-station:last-child { border-right: 0; }
body[data-sp-page='tools'] .tl-station span {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--dim);
  font-variant-numeric: tabular-nums;
}
body[data-sp-page='tools'] .tl-station:hover { color: var(--paper); border-bottom-color: var(--line-3); }
body[data-sp-page='tools'] .tl-station[aria-current='true'] { color: var(--paper); }
body[data-sp-page='tools'] .tl-station[aria-current='true'] span { color: var(--paper); }
body[data-sp-page='tools'] .tl-note { border-top: 1px solid var(--line-1); padding-top: 20px; }
body[data-sp-page='tools'] .tl-note .sp-body-copy { font-size: 16px; max-width: 70ch; }

/* =============================================================================
   5 · PORTFOLIO
   ========================================================================== */
html.sp-flat body[data-sp-page='portfolio'] .sp-layer[data-sp-lay='split'] > .pf-mast { grid-column: 1; }
html.sp-flat body[data-sp-page='portfolio'] .sp-layer[data-sp-lay='split'] > .pf-patents { grid-column: 2; }
html.sp-flat body[data-sp-page='portfolio'] .sp-layer[data-sp-lay='split'] > .pf-continue { grid-column: 1 / -1; }

body[data-sp-page='portfolio'] .pf-groups {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: clamp(28px, 4vw, 64px);
  align-items: start;
}
body[data-sp-page='portfolio'] .pf-group { padding-top: 6px; }
body[data-sp-page='portfolio'] .pf-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-2);
}
body[data-sp-page='portfolio'] .pf-group__name {
  font-family: var(--f-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--paper);
}
body[data-sp-page='portfolio'] .pf-group__span {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--dim);
  font-variant-numeric: tabular-nums;
}
body[data-sp-page='portfolio'] .pf-row {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr) 24px;
  gap: 18px;
  align-items: start;
  padding: 22px 0;
  border-bottom: 1px solid var(--line-1);
  transition: padding .3s var(--e-out), border-color .3s var(--e-out);
}
body[data-sp-page='portfolio'] .pf-row:last-child { padding-bottom: 8px; }
body[data-sp-page='portfolio'] .pf-row__no {
  font-family: var(--f-mono);
  font-size: 12px;
  line-height: 1.9;
  letter-spacing: .04em;
  color: var(--dim);
  font-variant-numeric: tabular-nums;
}
body[data-sp-page='portfolio'] .pf-row__body { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
body[data-sp-page='portfolio'] .pf-row__title {
  font-family: var(--f-display);
  font-size: clamp(18px, 1.5vw, 22px);
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: -.012em;
  color: var(--paper);
}
body[data-sp-page='portfolio'] .pf-row__kw {
  font-family: var(--f-mono);
  font-size: 12px;
  line-height: 1.4;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--mute);
}
body[data-sp-page='portfolio'] .pf-row__desc {
  font-family: var(--f-cjk);
  font-size: 15px;
  line-height: 1.7;
  color: var(--paper-2);
  max-width: 72ch;
}
body[data-sp-page='portfolio'] .pf-row__go {
  align-self: center;
  font-family: var(--f-mono);
  font-size: 14px;
  color: var(--dim);
  transition: color .2s, transform .3s var(--e-out);
}
body[data-sp-page='portfolio'] a.pf-row:hover { padding-left: 10px; border-bottom-color: var(--line-3); }
body[data-sp-page='portfolio'] a.pf-row:hover .pf-row__go { color: var(--paper); transform: translate(2px, -2px); }

body[data-sp-page='portfolio'] .pf-scope { padding-top: 22px; border-top: 1px solid var(--line-2); margin-top: 8px; }
body[data-sp-page='portfolio'] .pf-scope .sp-body-copy { font-size: 17px; max-width: 78ch; }

/* --- patents ------------------------------------------------------------ */
body[data-sp-page='portfolio'] .pf-patents { border-top: 1px solid var(--line-2); }
body[data-sp-page='portfolio'] .pf-patent {
  display: grid;
  grid-template-columns: 132px minmax(0, 1fr);
  gap: 24px;
  align-items: start;
  padding: 24px 0;
  border-bottom: 1px solid var(--line-1);
}
body[data-sp-page='portfolio'] .pf-patent__no {
  font-family: var(--f-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .02em;
  color: var(--paper-2);
  font-variant-numeric: tabular-nums;
}
body[data-sp-page='portfolio'] .pf-patent__body { display: flex; flex-direction: column; gap: 8px; }
body[data-sp-page='portfolio'] .pf-patent__title {
  font-family: var(--f-cjk);
  font-size: clamp(18px, 1.5vw, 21px);
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: -.01em;
  color: var(--paper);
}
body[data-sp-page='portfolio'] .pf-patent__meta {
  font-family: var(--f-mono);
  font-size: 12px;
  line-height: 1.4;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--mute);
}
body[data-sp-page='portfolio'] .pf-patents__note {
  margin: 20px 0 0;
  font-family: var(--f-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .03em;
  color: var(--dim);
}

/* --- photography -------------------------------------------------------- */
body[data-sp-page='portfolio'] .pf-photos__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(8px, 1vw, 14px);
}
body[data-sp-page='portfolio'] .pf-photo { margin: 0; }
body[data-sp-page='portfolio'] .pf-photo__open {
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  background: none;
  cursor: zoom-in;
}
body[data-sp-page='portfolio'] .pf-photo img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--line-1);
  background: var(--ink-1);
  filter: saturate(.88) contrast(1.02);
  transition: border-color .35s var(--e-out), filter .35s var(--e-out), opacity .35s;
}
body[data-sp-page='portfolio'] .pf-photo__open:hover img,
body[data-sp-page='portfolio'] .pf-photo__open:focus-visible img {
  border-color: var(--line-3);
  filter: saturate(1) contrast(1.02);
}
body[data-sp-page='portfolio'] .pf-photo figcaption {
  margin-top: 8px;
  font-family: var(--f-mono);
  font-size: 12px;
  line-height: 1.3;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--dim);
}
body[data-sp-page='portfolio'] .pf-credit { padding-top: 20px; border-top: 1px solid var(--line-1); }
body[data-sp-page='portfolio'] .pf-credit .sp-body-copy { font-size: 15px; max-width: 74ch; }

/* lightbox (native <dialog>, no dependency) */
.pf-lb {
  position: fixed;
  inset: 0;
  width: 100vw;
  max-width: 100vw;
  height: 100vh;
  max-height: 100vh;
  margin: 0;
  padding: clamp(16px, 3vw, 40px);
  border: 0;
  background: rgba(5, 6, 10, .96);
  color: var(--paper);
  overflow: auto;
}
.pf-lb::backdrop { background: rgba(5, 6, 10, .92); }
.pf-lb[open] { display: grid; grid-template-rows: minmax(0, 1fr); align-items: center; }
.pf-lb figure {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  min-height: 0;
  margin: 0;
}
.pf-lb img { max-width: 100%; max-height: calc(100vh - 170px); margin: 0 auto; border: 1px solid var(--line-2); object-fit: contain; }
.pf-lb figcaption {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--mute);
  text-align: center;
}
.pf-lb__close {
  position: fixed;
  top: 18px;
  right: 20px;
  z-index: 2;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line-2);
  background: rgba(5, 6, 10, .8);
  color: var(--paper);
  font-family: var(--f-mono);
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
}
.pf-lb__close:hover { background: var(--paper); color: var(--ink-0); }

/* =============================================================================
   6 · ERROR DOCUMENT (404 / offline)
   ========================================================================== */
body[data-sp-page='error'] .sp-track {
  max-width: 1080px;
  min-height: calc(100svh - var(--hud-h));
  display: flex;
  align-items: center;
  padding-top: clamp(80px, 12vh, 140px);
  padding-bottom: clamp(80px, 12vh, 140px);
}
body[data-sp-page='error'] .rd-err {
  width: 100%;
}
body[data-sp-page='error'] .rd-err__inner { display: flex; flex-direction: column; align-items: flex-start; gap: clamp(18px, 2.6vw, 30px); }
/* space.css hides .sp-numeral in the flat document; the error page is the one
   place where the outlined numeral IS the page. */
body[data-sp-page='error'] .sp-numeral {
  display: flex;
  align-items: flex-start;
  gap: 0;
}
body[data-sp-page='error'] .rd-err .sp-ghost {
  font-size: clamp(140px, 23vw, 330px);
  line-height: .74;
  -webkit-text-stroke: 1px var(--line-3);
}
body[data-sp-page='error'] .rd-err__num--word .sp-ghost {
  font-size: clamp(56px, 11vw, 188px);
  letter-spacing: -.05em;
}
body[data-sp-page='error'] .rd-err__title {
  font-family: var(--f-cjk);
  font-size: clamp(24px, 2.6vw, 36px);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -.02em;
  color: var(--paper);
  max-width: 40ch;
}
body[data-sp-page='error'] .rd-err__desc {
  font-family: var(--f-cjk);
  font-size: 19px;
  line-height: 1.7;
  color: var(--paper-2);
  max-width: 52ch;
}
body[data-sp-page='error'] .rd-err__acts { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 6px; }
body[data-sp-page='error'] .rd-err__acts .sp-btn { min-width: 240px; }

/* =============================================================================
   7 · RESPONSIVE
   ========================================================================== */
@media (max-width: 1180px) {
  body[data-sp-page='tools'] .tl-grid__inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  body[data-sp-page='tools'] .tl-tool { min-height: 0; }
  body[data-sp-page='archive'] .ar-years__list { grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); }
}

@media (max-width: 980px) {
  html.sp-flat body[data-sp-page='about'] .sp-track,
  html.sp-flat body[data-sp-page='archive'] .sp-track,
  html.sp-flat body[data-sp-page='tools'] .sp-track,
  html.sp-flat body[data-sp-page='portfolio'] .sp-track {
    max-width: 100%;
    border-inline: 0;
    background: rgba(5, 6, 10, .84);
  }
  html.sp-flat body[data-sp-page='about'] .sp-layer[data-sp-lay='hero'],
  html.sp-flat body[data-sp-page='about'] .sp-layer[data-sp-lay='split'],
  html.sp-flat body[data-sp-page='about'] .sp-layer[data-sp-lay='grid3'],
  html.sp-flat body[data-sp-page='archive'] .sp-layer[data-sp-lay='split'],
  html.sp-flat body[data-sp-page='archive'] .sp-layer[data-sp-lay='year'],
  html.sp-flat body[data-sp-page='tools'] .sp-layer[data-sp-lay='split'],
  html.sp-flat body[data-sp-page='portfolio'] .sp-layer[data-sp-lay='split'],
  html.sp-flat body[data-sp-page='portfolio'] .sp-layer[data-sp-lay='grid2'] {
    grid-template-columns: minmax(0, 1fr);
  }
  /* explicit column 2 in a one-column grid would create an implicit track and
     squeeze every other panel to 0px — reset the placements with the template */
  html.sp-flat body[data-sp-page='archive'] .sp-layer[data-sp-lay='year'] > .ar-ytags { grid-column: 1 / -1; }
  html.sp-flat body[data-sp-page='portfolio'] .sp-layer[data-sp-lay='split'] > .pf-mast { grid-column: 1 / -1; }
  html.sp-flat body[data-sp-page='portfolio'] .sp-layer[data-sp-lay='split'] > .pf-patents { grid-column: 1 / -1; }
  body[data-sp-page='portfolio'] .pf-groups { grid-template-columns: minmax(0, 1fr); }
  body[data-sp-page='about'] .ab-ident { grid-template-columns: 120px minmax(0, 1fr); }
  body[data-sp-page='about'] .ab-areas { grid-template-columns: minmax(0, 1fr); }
  body[data-sp-page='about'] .ab-affilblock__rows { grid-template-columns: minmax(0, 1fr); border-bottom: 0; }
  body[data-sp-page='about'] .ab-affilblock__row {
    padding: 16px 0;
    border-left: 0;
    border-top: 1px solid var(--line-1);
  }
  body[data-sp-page='about'] .ab-affilblock__row:first-child { border-top: 0; }
  html.sp-flat body[data-sp-page='about'] .sp-layer[data-sp-lay='hero'] > .ab-mast,
  html.sp-flat body[data-sp-page='about'] .sp-layer[data-sp-lay='hero'] > .ab-statement,
  html.sp-flat body[data-sp-page='about'] .sp-layer[data-sp-lay='hero'] > .ab-ident,
  html.sp-flat body[data-sp-page='about'] .sp-layer[data-sp-lay='hero'] > .ab-affilblock { grid-column: 1 / -1; }
  body[data-sp-page='about'] .ab-news__item { grid-template-columns: 84px minmax(0, 1fr); }
  body[data-sp-page='archive'] .ar-yhead { position: static; }
  body[data-sp-page='archive'] .ar-yhead__num { font-size: clamp(48px, 9vw, 76px); }
  body[data-sp-page='archive'] .ar-yhead__years { margin-top: 14px; }
  body[data-sp-page='portfolio'] .pf-photos__grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  body[data-sp-page='portfolio'] .pf-patent { grid-template-columns: 110px minmax(0, 1fr); gap: 18px; }
}

@media (max-width: 760px) {
  html.sp-flat body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .sp-station { padding-block: clamp(38px, 8vw, 60px); }
  html.sp-flat body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .sp-layer { gap: 30px; }
  body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) :is(.ab-display, .ar-display, .tl-display, .pf-display) { font-size: clamp(44px, 10.4vw, 62px); }
  body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) :is(.ab-h2, .ar-h2, .tl-h2, .pf-h2) { font-size: clamp(30px, 7vw, 38px); }
  body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .sp-body-copy { font-size: 18px; line-height: 1.7; }
  body[data-sp-page='about'] .ab-ident { grid-template-columns: 1fr; gap: 18px; }
  body[data-sp-page='about'] .ab-portrait { max-width: 200px; }
  body[data-sp-page='about'] .ab-ident__grid { display: grid; gap: 18px; }
  body[data-sp-page='about'] .ab-profiles__grid { grid-template-columns: 1fr; }
  body[data-sp-page='about'] .ab-award { grid-template-columns: 72px minmax(0, 1fr); gap: 14px; }
  body[data-sp-page='about'] .ab-mail__addr { font-size: 16px; }
  body[data-sp-page='about'] .ab-pub { grid-template-columns: 48px minmax(0, 1fr); gap: 12px; }
  body[data-sp-page='about'] .ab-pub__acts { margin-left: 0; flex-basis: 100%; gap: 12px; }
  body[data-sp-page='archive'] .ar-row__link { grid-template-columns: 52px minmax(0, 1fr); gap: 12px; }
  body[data-sp-page='archive'] .ar-row__go { display: none; }
  body[data-sp-page='archive'] .ar-ytag { grid-template-columns: minmax(0, 1fr) 72px 28px; gap: 10px; }
  body[data-sp-page='tools'] .tl-exhibits { grid-template-columns: minmax(0, 1fr); }
  body[data-sp-page='tools'] .tl-stations__list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  body[data-sp-page='tools'] .tl-station:nth-child(2n) { border-right: 0; }
  body[data-sp-page='portfolio'] .pf-photos__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  body[data-sp-page='portfolio'] .pf-row { grid-template-columns: 42px minmax(0, 1fr); gap: 12px; }
  body[data-sp-page='portfolio'] .pf-row__go { display: none; }
  body[data-sp-page='portfolio'] .pf-patent { grid-template-columns: minmax(0, 1fr); gap: 10px; }
  body[data-sp-page='error'] .rd-err__acts .sp-btn { width: 100%; min-width: 0; }
}

@media (max-width: 460px) {
  body[data-sp-page='about'] .ab-stats .sp-kpi__v { font-size: 30px; }
  body[data-sp-page='tools'] .tl-grid__inner { grid-template-columns: minmax(0, 1fr); }
  body[data-sp-page='archive'] .ar-year { padding-right: 12px; }
  body[data-sp-page='archive'] .ar-search { grid-template-columns: minmax(0, 1fr); gap: 6px; }
  body[data-sp-page='archive'] .ar-yhead__meta { gap: 6px 14px; }
  body[data-sp-page='portfolio'] .pf-photos__grid { gap: 8px; }
  body[data-sp-page='portfolio'] .pf-photo figcaption { font-size: 12px; }
}

/* =============================================================================
   8 · MOTION / PRINT
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  body[data-sp-page='archive'] .ar-row,
  body[data-sp-page='archive'] .ar-row__link,
  body[data-sp-page='archive'] .ar-ytag,
  body[data-sp-page='portfolio'] .pf-row,
  body[data-sp-page='portfolio'] .pf-photo img,
  body[data-sp-page='tools'] .tl-tool { transition: none; }
}

@media print {
  html.sp-flat body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .sp-track { max-width: none; background: #fff; border: 0; }
  body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) { color: #111; }
  body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) :is(.ab-display, .ar-display, .tl-display, .pf-display),
  body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) :is(.ab-h2, .ar-h2, .tl-h2, .pf-h2),
  body:is([data-sp-page='about'], [data-sp-page='archive'], [data-sp-page='tools'], [data-sp-page='portfolio']) .sp-body-copy { color: #111; }
}