/* ============================================================
   SkillForge — project page
   Design language shared with /carve/, /graphdo/ and /prism-delta/:
   terracotta accent · Source Serif 4 / Space Mono · sharp corners
   · film-grain / scanline / vignette texture · reveal-on-scroll
   ============================================================ */

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;font-size:19px}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

:root{
  --bg:#faf7f2; --bg2:#f3ece2; --card:#fdfbf7;
  --fg:#1c1a16; --muted:#6b6258; --line:rgba(28,26,22,.13);
  --accent:#B5613C; --accent2:#D6402A; --accent-soft:rgba(181,97,60,.11);
  --maxw:1180px;
  --ff-display:'Source Serif 4',Georgia,'Times New Roman',serif;
  --ff-mono:'Space Mono',ui-monospace,monospace;
  --ff-body:'Source Serif 4',Georgia,'Times New Roman',serif;
  /* lifecycle state colors, mirrored from the paper's figures */
  --st-trial:#CE7336; --st-active:#6592C0; --st-stable:#2172B5; --st-retired:#D62727;
  --st-gray:#9E9E9E;
}
[data-theme="dark"]{
  --bg:#161310; --bg2:#1d1813; --card:#1f1a15;
  --fg:#ece6dd; --muted:#9b8f80; --line:rgba(236,230,221,.12);
  --accent:#D4845C; --accent2:#FF6B35; --accent-soft:rgba(212,132,92,.14);
  --st-trial:#E08A4C; --st-active:#7BA9D6; --st-stable:#4C9BE0; --st-retired:#EA4B4B;
}

body{
  margin:0; background:var(--bg); color:var(--fg);
  font-family:var(--ff-body); font-size:1rem; line-height:1.7;
  -webkit-font-smoothing:antialiased; overflow-x:hidden;
  transition:background .4s ease,color .4s ease;
}
img{max-width:100%;display:block}
a{color:var(--accent);text-decoration:none}
::selection{background:var(--accent-soft);color:inherit}

:root{scrollbar-width:thin;scrollbar-color:rgba(181,97,60,.4) transparent}
::-webkit-scrollbar{width:7px;height:7px}
::-webkit-scrollbar-thumb{background:rgba(181,97,60,.4)}
[data-theme="dark"] ::-webkit-scrollbar-thumb{background:rgba(212,132,92,.4)}

/* ---------- global texture overlays ---------- */
.grain,.scan{position:fixed;inset:0;pointer-events:none;z-index:9000}
.grain{
  opacity:.04;mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size:170px 170px;
}
[data-theme="dark"] .grain{opacity:.05;mix-blend-mode:screen}
.scan{
  opacity:.025;
  background-image:repeating-linear-gradient(0deg,#000 0 1px,transparent 1px 4px);
}
[data-theme="dark"] .scan{opacity:.09}

/* ---------- scroll progress ---------- */
.progress{position:fixed;top:0;left:0;height:3px;width:100%;z-index:9500;background:transparent}
.progress i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--accent),var(--accent2));box-shadow:0 0 12px var(--accent2)}

/* ---------- nav ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:8000;
  display:flex;align-items:center;justify-content:space-between;
  padding:16px clamp(18px,4vw,46px);
  transition:background .35s ease,backdrop-filter .35s ease,border-color .35s ease;
  border-bottom:1px solid transparent;
}
.nav.solid{background:var(--bg);background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:blur(12px) saturate(1.2);border-bottom-color:var(--line)}
.nav:not(.solid) .nav__brand,.nav:not(.solid) .nav__links a,.nav:not(.solid) .icon-btn{color:#f3ece2}
.nav:not(.solid) .icon-btn{border-color:rgba(255,255,255,.3)}
.nav:not(.solid) .nav__links a:hover,.nav:not(.solid) .nav__links a.active{color:var(--accent)}
.nav:not(.solid) .icon-btn:hover{border-color:var(--accent);color:var(--accent)}
.nav__brand{font-family:var(--ff-display);font-weight:700;letter-spacing:.02em;font-size:1rem;color:var(--fg);display:flex;align-items:center;gap:9px}
.nav__brand .dot{width:9px;height:9px;background:var(--accent2);border-radius:50%;box-shadow:0 0 10px var(--accent2)}
.nav__links{display:flex;gap:26px;align-items:center}
.nav__links a{font-family:var(--ff-mono);font-size:.789rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);transition:color .2s}
.nav__links a:hover,.nav__links a.active{color:var(--accent)}
.nav__tools{display:flex;gap:10px;align-items:center}
.icon-btn{
  width:38px;height:38px;display:grid;place-items:center;cursor:pointer;
  background:transparent;border:1px solid var(--line);color:var(--fg);
  transition:all .2s ease;
}
.icon-btn:hover{border-color:var(--accent);color:var(--accent)}
.icon-btn svg{width:17px;height:17px}
@media(max-width:900px){.nav__links{display:none}}

/* ---------- hero ---------- */
.hero{
  position:relative;min-height:100svh;display:flex;flex-direction:column;
  justify-content:center;align-items:center;text-align:center;
  padding:120px 20px 80px;overflow:hidden;
  background:radial-gradient(ellipse 80% 60% at 50% 18%,#241a13 0%,#120d09 60%,#0c0805 100%);
  color:#f3ece2;
  --hero-halo:rgba(16,11,7,.85);
}
#forgeScene{
  position:absolute;bottom:-4%;right:0;height:58%;aspect-ratio:1/1;
  overflow:hidden;z-index:0;pointer-events:none;
  /* just enough of a fade to take the hard edge off the forge wall where it
     meets the author line; anything wider starts eating the anvil */
  -webkit-mask-image:linear-gradient(to right,transparent 0%,#000 14%);
  mask-image:linear-gradient(to right,transparent 0%,#000 14%);
}
#forgeScene video,
#forgeScene img{
  position:absolute;top:0;left:0;height:100%;width:auto;max-width:none;
  display:block;
}
/* Fallback only — app.js drops this in when the browser cannot composite a
   VP9 alpha plane. Twelve frames across the sheet, step-end so each pose is
   held then cut to; any interpolating timing function would slide the sheet.
   The stop spacing mirrors where those twelve frames fall in the 93-frame
   video loop, so both layers beat in the same rhythm. */
@keyframes forgeLoop{
  0%     {transform:translateX(0)}
  8.60%  {transform:translateX(-8.3333%)}
  17.20% {transform:translateX(-16.6667%)}
  24.73% {transform:translateX(-25%)}
  33.33% {transform:translateX(-33.3333%)}
  41.94% {transform:translateX(-41.6667%)}
  49.46% {transform:translateX(-50%)}
  58.06% {transform:translateX(-58.3333%)}
  66.67% {transform:translateX(-66.6667%)}
  75.27% {transform:translateX(-75%)}
  83.87% {transform:translateX(-83.3333%)}
  91.40% {transform:translateX(-91.6667%)}
  100%   {transform:translateX(0)}
}
#forgeScene img{animation:forgeLoop 3.875s step-end infinite}
@media (prefers-reduced-motion:reduce){
  #forgeScene img{animation:none;transform:translateX(-50%)}   /* hold the impact */
  #forgeScene video{display:none}                              /* poster stands in */
}
@media (max-width:1100px){#forgeScene{height:50%;right:-4%}}
@media (max-width:760px){#forgeScene{height:40%;right:-8%;bottom:-3%}}
.hero__vign{position:absolute;inset:0;z-index:1;pointer-events:none;
  background:radial-gradient(ellipse at center,transparent 50%,rgba(0,0,0,.55) 100%)}
.hero__inner{position:relative;z-index:2;max-width:1000px;animation:rise .9s cubic-bezier(.2,.7,.2,1) both}
.eyebrow{
  font-family:var(--ff-mono);font-size:.737rem;letter-spacing:.34em;text-transform:uppercase;
  color:var(--accent);margin-bottom:22px;display:inline-flex;gap:12px;align-items:center;
}
.eyebrow::before,.eyebrow::after{content:"";width:26px;height:1px;background:currentColor;opacity:.5}
.hero h1{
  font-family:var(--ff-display);font-weight:700;letter-spacing:-.012em;line-height:1.04;
  font-size:clamp(1.642rem,4.6vw,2.947rem);margin:0 0 18px;color:#fff;
}
.hero h1 .hl{
  background-image:linear-gradient(90deg,var(--accent),var(--accent2));
  background-repeat:no-repeat;background-position:0 92%;background-size:0% .12em;
  padding-bottom:.04em;animation:wipe2 1s cubic-bezier(.6,0,.2,1) .55s forwards;
}
.hero__sub{font-size:clamp(1rem,2vw,1.095rem);color:#cbbfb1;max-width:660px;margin:0 auto 26px;font-weight:300}
/* the forge scene sits behind the copy, so give the text a soft halo */
.hero h1,.hero__sub,.hero__authors,.hero__aff,.hero__corr,.eyebrow{
  text-shadow:0 1px 14px var(--hero-halo),0 0 4px var(--hero-halo);
}
.hero__authors{font-size:1rem;color:#e7ddd0;line-height:1.9;max-width:940px;margin:0 auto 6px}
/* four authors per line, so the list reads as a block rather than reflowing
   into whatever the viewport happens to fit */
.hero__authors .au-row{display:block}
.hero__authors a{color:#e7ddd0;border-bottom:1px solid transparent;transition:.2s}
.hero__authors a:hover{color:#fff;border-bottom-color:var(--accent)}
.hero__authors sup{color:var(--accent)}
.hero__aff{font-size:.842rem;color:#a89b8c;max-width:940px;margin:6px auto 0;font-family:var(--ff-mono);letter-spacing:.02em}
/* each affiliation is atomic, so a narrow viewport breaks at the dot rather
   than mid-name — "University of California, Merced" stays on one line */
.hero__aff .aff{display:inline-block;white-space:nowrap}
.hero__corr{font-size:.789rem;color:#7d7164;margin-top:4px;font-family:var(--ff-mono)}

.btns{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:34px}
.btn{
  display:inline-flex;align-items:center;gap:9px;padding:12px 20px;cursor:pointer;
  font-family:var(--ff-mono);font-size:.789rem;letter-spacing:.12em;text-transform:uppercase;
  border:1px solid rgba(255,255,255,.28);color:#f3ece2;background:rgba(255,255,255,.03);
  transition:all .22s ease;
}
.btn:hover{background:var(--accent);border-color:var(--accent);color:#1a120c;transform:translateY(-2px)}
.btn svg{width:15px;height:15px}
.btn--solid{background:var(--accent);border-color:var(--accent);color:#1a120c}
.btn--solid:hover{background:var(--accent2);border-color:var(--accent2)}
/* the archive/arXiv link is not public while the paper is under review */
.btn--pending{cursor:default;opacity:.55;border-style:dashed}
.btn--pending:hover{background:rgba(255,255,255,.03);border-color:rgba(255,255,255,.28);color:#f3ece2;transform:none}
.btn--pending em{font-style:normal;font-size:.86em;letter-spacing:.1em;opacity:.75}
@media(max-width:1023px){
  .btns{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));justify-items:stretch}
  .btns .btn{justify-content:center}
}
@media(max-width:640px){
  .btns{grid-template-columns:repeat(2,minmax(0,1fr))}
}

.scrollcue{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);z-index:2;
  font-family:var(--ff-mono);font-size:.737rem;letter-spacing:.3em;text-transform:uppercase;color:#9c9082;
  display:flex;flex-direction:column;align-items:center;gap:10px;animation:rise 1s 1.1s both}
.scrollcue span{width:1px;height:42px;background:linear-gradient(var(--accent),transparent);animation:cue 1.8s ease-in-out infinite}

/* ---------- generic section ---------- */
.section{position:relative;padding:clamp(70px,11vw,140px) clamp(20px,5vw,40px);max-width:var(--maxw);margin:0 auto}
.section--alt{max-width:none;background:var(--bg2)}
.section--alt .inner{max-width:var(--maxw);margin:0 auto}
.eyebrow--sec{color:var(--accent);justify-content:flex-start;margin-bottom:14px}
.eyebrow--sec::before{display:none}
.h2{font-family:var(--ff-display);font-weight:700;letter-spacing:-.012em;line-height:1.12;
  font-size:clamp(1.432rem,4vw,2.442rem);margin:0 0 22px;max-width:22ch}
.h2 .dot{display:inline-block;width:13px;height:13px;background:var(--accent2);border-radius:50%;margin-left:8px;margin-right:-21px;vertical-align:super}
.lead{font-size:clamp(1rem,1.6vw,1.053rem);color:var(--muted);max-width:62ch;line-height:1.75}
.lead + .lead{margin-top:18px}
.lead strong{color:var(--fg)}

.lead--drop::first-letter{
  float:left;font-family:var(--ff-display);font-weight:700;font-size:3.5em;
  line-height:.78;margin:.04em .1em 0 0;color:var(--accent2);
}

.muted{color:var(--muted)}
.kbd{font-family:var(--ff-mono);background:var(--accent-soft);color:var(--accent);padding:1px 7px;font-size:.85em;white-space:nowrap}
.term{font-family:var(--ff-mono);color:var(--accent);font-size:.92em;white-space:nowrap}

/* reveal-on-scroll */
.reveal{opacity:0;transform:translateY(34px);transition:opacity .9s cubic-bezier(.2,.7,.2,1),transform .9s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
.reveal[data-d="1"]{transition-delay:.1s}.reveal[data-d="2"]{transition-delay:.2s}
.reveal[data-d="3"]{transition-delay:.3s}.reveal[data-d="4"]{transition-delay:.4s}

/* ---------- teaser band ----------
   The overview illustration is line art on paper, and its background is cut out
   to transparency. So this band stays a light "paper insert" in BOTH themes —
   otherwise the figure's black labels would land on a dark background. */
.teaser{
  position:relative;padding:clamp(56px,8vw,104px) 20px clamp(40px,6vw,72px);
  text-align:center;overflow:hidden;
  background:radial-gradient(ellipse 118% 132% at 50% 0%,#fdfaf5 0%,#f4ecdf 58%,#ebdfcb 100%);
  color:#1c1a16;
  border-top:1px solid rgba(28,26,22,.08);
  border-bottom:1px solid rgba(28,26,22,.08);
}
[data-theme="dark"] .teaser{
  background:radial-gradient(ellipse 118% 132% at 50% 0%,#fdfaf5 0%,#f0e6d7 58%,#e4d6c1 100%);
}
.teaser .eyebrow--sec{justify-content:center;color:#B5613C}
.teaser h2{font-family:var(--ff-display);font-weight:700;font-size:clamp(1.347rem,3.6vw,2.189rem);margin:0 auto 14px;max-width:32ch}
.teaser p{color:#6b6258;max-width:62ch;margin:0 auto 38px}
.teaser p strong{color:#B5613C}
.teaser__fig{width:min(96vw,1440px);margin:0 auto}
.teaser__fig img{width:100%;height:auto;display:block}
.teaser__cap{
  width:min(96vw,1440px);margin:14px auto 0;text-align:left;
  font-family:var(--ff-mono);font-size:.737rem;letter-spacing:.03em;line-height:1.6;color:#8b7f72;
}
@media(max-width:760px){.teaser p{font-size:.95rem}.teaser__cap{font-size:.68rem}}

/* ---------- cards ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:46px}
.card{background:var(--card);border:1px solid var(--line);padding:30px 26px;position:relative;transition:border-color .3s,transform .3s}
.card:hover{border-color:var(--accent);transform:translateY(-4px)}
.card__n{font-family:var(--ff-mono);font-size:.789rem;letter-spacing:.2em;color:var(--accent);margin-bottom:16px}
.card h3{font-family:var(--ff-display);font-size:1rem;margin:0 0 10px;font-weight:600;letter-spacing:-.01em}
.card p{font-size:.921rem;color:var(--muted);margin:0;line-height:1.65}
.card p + p{margin-top:10px}
@media(max-width:780px){.cards{grid-template-columns:1fr}}

/* ---------- figure block ---------- */
.figure{margin:42px 0 0;border:1px solid var(--line);background:var(--card)}
.figure img{width:100%;height:auto;display:block;background:#fff}
[data-theme="dark"] .figure img{background:#fff}
.figure figcaption{font-family:var(--ff-mono);font-size:.737rem;letter-spacing:.04em;color:var(--muted);padding:14px 18px;border-top:1px solid var(--line);line-height:1.6}
.figure--wide{margin-top:36px}
.two{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.three{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
@media(max-width:780px){.two,.three{grid-template-columns:1fr}}
/* figures that are chart plates: keep them on white in both themes */
.plate{background:#fff;border:1px solid var(--line);padding:14px}
.plate img{width:100%;height:auto;display:block}
.plate__cap{font-family:var(--ff-mono);font-size:.737rem;letter-spacing:.06em;color:var(--muted);text-align:center;margin-top:12px;line-height:1.55}

/* ---------- equations ---------- */
.eq{background:var(--card);border:1px solid var(--line);border-left:3px solid var(--accent);
  padding:22px 26px;margin:26px 0;overflow-x:auto}
.eq .katex{font-size:1.15em}
.eqlabel{font-family:var(--ff-mono);font-size:.737rem;letter-spacing:.16em;text-transform:uppercase;color:var(--accent);margin-bottom:12px}
.eq__note{font-family:var(--ff-mono);font-size:.737rem;color:var(--muted);margin-top:10px;line-height:1.6}

/* ---------- stats ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:40px 0}
.stat{border:1px solid var(--line);background:var(--card);padding:26px 22px;text-align:left}
.stat__v{font-family:var(--ff-display);font-weight:700;font-size:clamp(1.684rem,4.4vw,2.442rem);line-height:1;color:var(--accent);letter-spacing:-.012em}
.stat__l{font-family:var(--ff-mono);font-size:.737rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-top:12px;line-height:1.5}
@media(max-width:780px){.stats{grid-template-columns:1fr 1fr}}

/* ---------- lifecycle: circular state machine ---------- */
.life{margin-top:40px;background:var(--card);border:1px solid var(--line);padding:clamp(20px,3vw,34px)}
.life__grid{display:grid;grid-template-columns:1fr .82fr;gap:34px;align-items:center}
@media(max-width:900px){.life__grid{grid-template-columns:1fr}}
.life__stage{position:relative}
.life__stage svg{width:100%;height:auto;display:block;overflow:visible}
.stnode{cursor:pointer}
.stnode circle.ring{transition:fill-opacity .25s ease,stroke-width .25s ease}
.stnode:hover circle.ring,.stnode.on circle.ring{stroke-width:3.5;fill-opacity:.22}
.stnode text{font-family:var(--ff-mono);pointer-events:none}
.stnode text.t{font-size:15px;letter-spacing:.06em}
.stnode .ico{fill:none;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}
.stlabels text{font-family:var(--ff-mono);font-size:12.5px;letter-spacing:.01em}
.stedge{transition:opacity .25s ease,stroke-width .25s ease;cursor:pointer}
.stedge.dim{opacity:.1}
.stedge.hot{stroke-width:4;opacity:1}
.life__read h3{font-family:var(--ff-display);font-size:1.221rem;margin:0 0 10px;font-weight:600}
.life__read p{color:var(--muted);font-size:.921rem;margin:0 0 14px;line-height:1.7}
.life__state{display:flex;align-items:center;gap:10px;font-family:var(--ff-mono);font-size:.737rem;
  letter-spacing:.14em;text-transform:uppercase;margin-bottom:14px}
.life__state i{width:11px;height:11px;border-radius:50%;display:inline-block;flex:0 0 auto}

/* ---------- threshold ruler ---------- */
.ruler{border:1px solid var(--line);background:var(--card);padding:clamp(16px,2.4vw,24px);
  display:flex;flex-direction:column;justify-content:center}
.ruler svg{width:100%;height:auto;display:block}
.ruler__legend{display:grid;grid-template-columns:1fr 1fr;gap:12px 16px;margin-top:18px;
  border-top:1px solid var(--line);padding-top:16px}
.ruler svg{margin-bottom:2px}
.ruler__split{margin:20px 0 12px;padding-top:16px;border-top:1px solid var(--line);
  font-family:var(--ff-mono);font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;color:var(--accent)}
.ruler__item{font-size:.78rem;color:var(--muted);line-height:1.5}
.ruler__item b{display:block;font-family:var(--ff-mono);font-size:.68rem;letter-spacing:.08em;
  text-transform:uppercase;color:var(--accent);margin-bottom:4px}
.life__read h3{font-family:var(--ff-display);font-size:1.221rem;margin:0 0 10px;font-weight:600}
.life__read p{color:var(--muted);font-size:.921rem;margin:0 0 14px}
.life__state{display:flex;align-items:center;gap:10px;font-family:var(--ff-mono);font-size:.737rem;
  letter-spacing:.14em;text-transform:uppercase;margin-bottom:14px}
.life__state i{width:11px;height:11px;border-radius:50%;display:inline-block;flex:0 0 auto}
.life__envs{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.envpill{font-family:var(--ff-mono);font-size:.632rem;letter-spacing:.08em;text-transform:uppercase;
  border:1px solid var(--line);padding:4px 9px;color:var(--muted)}
.envpill b{color:var(--fg)}

/* ---------- algorithm ---------- */
.algo{margin-top:30px;background:var(--card);border:1px solid var(--line);font-family:var(--ff-mono);font-size:.842rem}
.algo__h{padding:12px 18px;border-bottom:1px solid var(--line);color:var(--accent);letter-spacing:.1em;text-transform:uppercase;font-size:.737rem;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
.algo__h span{color:var(--muted)}
.algo ol{margin:0;padding:18px 18px 18px 44px;line-height:2}
.algo li{color:var(--fg)}.algo li::marker{color:var(--accent)}
.algo .c{color:var(--muted)}

/* ---------- method pipeline ---------- */
.pipe{display:flex;align-items:stretch;gap:8px;margin-top:38px;flex-wrap:wrap}
.pipe__node{
  flex:1 1 150px;background:var(--card);border:1px solid var(--line);padding:18px 16px;
  display:flex;flex-direction:column;gap:6px;justify-content:center;
}
.pipe__node b{font-family:var(--ff-mono);font-size:.737rem;letter-spacing:.12em;text-transform:uppercase;color:var(--accent)}
.pipe__node span{font-size:.921rem;color:var(--muted);line-height:1.45}
.pipe__node--hot{border-color:var(--accent);background:var(--accent-soft)}
.pipe__node--hot b{color:var(--accent2)}
.pipe__arrow{display:flex;align-items:center;color:var(--accent);font-size:1.1rem;opacity:.55}
@media(max-width:860px){
  .pipe{flex-direction:column;align-items:stretch}
  .pipe__arrow{justify-content:center;transform:rotate(90deg);padding:2px 0}
}

/* ---------- forging cycle ring ---------- */
.ring{margin-top:26px;border:1px solid var(--line);background:var(--card);padding:clamp(16px,3vw,26px)}
.ring__grid{display:grid;grid-template-columns:.92fr 1.08fr;gap:34px;align-items:center}
@media(max-width:900px){.ring__grid{grid-template-columns:1fr}}
.ring__stage svg{width:100%;height:auto;display:block;overflow:visible}
.rnode rect{transition:fill-opacity .25s,stroke-width .25s;cursor:default}
.rnode:hover rect{stroke-width:3;fill-opacity:.3}
.rnode text{font-family:var(--ff-mono);pointer-events:none}
.rnode .rn{font-size:12.5px;letter-spacing:.06em}
.rnode .rc{font-size:11.5px}
.rarw{color:var(--accent)}
.ring__note{font-family:var(--ff-mono);font-size:.737rem;letter-spacing:.06em;color:var(--muted);line-height:1.7}
.ring__note b{color:var(--accent)}

/* ---------- mutation diagram ---------- */
.mut{display:flex;flex-direction:column;gap:10px}
.mut__skill{border:1px solid var(--line);background:var(--bg);padding:13px 15px}
.mut__skill.parent{border-color:rgba(206,115,54,.5)}
.mut__skill.win{border-color:rgba(33,114,181,.5)}
.mut__skill.lose{border-color:rgba(214,39,39,.45)}
.mut__skill h5{font-family:var(--ff-display);font-size:.921rem;margin:0 0 8px;font-weight:600;line-height:1.3}
.mut__f{font-family:var(--ff-mono);font-size:.7rem;color:var(--muted);display:flex;align-items:center;gap:9px}
.mut__bar{flex:1;height:6px;background:var(--bg2);position:relative;min-width:36px}
.mut__bar i{position:absolute;left:0;top:0;bottom:0;width:0;transition:width .9s cubic-bezier(.2,.7,.2,1)}
.mut__skill.parent .mut__bar i{background:var(--st-trial)}
.mut__skill.win .mut__bar i{background:var(--st-stable)}
.mut__skill.lose .mut__bar i{background:var(--st-retired)}
.mut__tag{font-family:var(--ff-mono);font-size:.632rem;letter-spacing:.1em;text-transform:uppercase;
  padding:2px 7px;color:#fff;margin-left:auto;white-space:nowrap}
.mut__skill.win .mut__tag{background:var(--st-stable)}
.mut__skill.lose .mut__tag{background:var(--st-retired)}
.mut__arrow{display:flex;align-items:center;gap:10px;font-family:var(--ff-mono);font-size:.68rem;
  letter-spacing:.08em;text-transform:uppercase;color:var(--accent);padding-left:4px}
.mut__arrow::before{content:"↓";font-size:.95rem;line-height:1}
.mut__arrow em{font-style:normal;color:var(--muted);text-transform:none;letter-spacing:.04em}
.mut__eq{margin-top:14px;padding-top:13px;border-top:1px solid var(--line);
  font-family:var(--ff-mono);font-size:.7rem;letter-spacing:.04em;color:var(--muted);line-height:1.7}

/* ---------- §2 sub-figure row: dynamics + threshold ruler ---------- */
.subfigs{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:34px;align-items:stretch}
@media(max-width:900px){.subfigs{grid-template-columns:1fr}}

/* ---------- library dynamics (native) ---------- */
.dyn{border:1px solid var(--line);background:var(--card);padding:clamp(16px,2.4vw,24px)}
.dyn__head{display:flex;flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:16px}
.dyn__tabs{display:flex;flex-wrap:wrap;gap:8px}
.dyn__legend{display:flex;flex-wrap:wrap;gap:6px 14px;font-family:var(--ff-mono);font-size:.68rem;
  letter-spacing:.04em;text-transform:uppercase;color:var(--muted)}
.dyn__legend span{display:inline-flex;align-items:center;gap:7px}
.dyn__legend i{width:14px;height:10px;display:inline-block}
.dyn__stage svg{width:100%;height:auto;display:block;overflow:visible}
.dyn__read{margin-top:14px;border-top:1px solid var(--line);padding-top:14px;display:flex;flex-wrap:wrap;
  gap:6px 16px;font-family:var(--ff-mono);font-size:.72rem;color:var(--muted)}
.dyn__src{margin-top:12px;font-family:var(--ff-mono);font-size:.68rem;color:var(--muted);line-height:1.6}
.dyn__read b{color:var(--fg)}
.dyn__read i{width:9px;height:9px;display:inline-block;margin-right:7px;border-radius:50%}
.dyn__hover{cursor:crosshair}

/* ---------- native chart pair (curves + radar) ---------- */
.pairchart{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:34px;align-items:stretch}
@media(max-width:900px){.pairchart{grid-template-columns:1fr}}
.pc{border:1px solid var(--line);background:var(--card);padding:clamp(16px,2.4vw,24px);display:flex;flex-direction:column}
.pc__t{font-family:var(--ff-mono);font-size:.737rem;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin-bottom:4px}
.pc__sub{font-size:.842rem;color:var(--muted);line-height:1.55;margin:0 0 16px}
.pc__stage{flex:0 0 auto}
.pc__stage svg{width:100%;height:auto;display:block;overflow:visible}
.pc__legend{display:flex;flex-wrap:wrap;gap:6px 14px;margin-top:14px;font-family:var(--ff-mono);
  font-size:.7rem;letter-spacing:.05em;color:var(--muted)}
.pc__legend button{display:inline-flex;align-items:center;gap:7px;background:none;border:0;cursor:pointer;
  font:inherit;color:inherit;padding:2px 0;transition:color .2s,opacity .2s}
.pc__legend button:hover{color:var(--fg)}
.pc__legend button.off{opacity:.35}
.pc__legend i{width:16px;height:3px;display:inline-block}
.pc__read{margin-top:auto;padding-top:12px;font-family:var(--ff-mono);font-size:.7rem;color:var(--muted);min-height:1.2em}

/* ---------- chart ---------- */
.chart{margin-top:30px;background:var(--card);border:1px solid var(--line);padding:clamp(20px,3vw,34px)}
.chart__tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:30px}
.tab{font-family:var(--ff-mono);font-size:.737rem;letter-spacing:.08em;text-transform:uppercase;
  padding:8px 14px;border:1px solid var(--line);background:transparent;color:var(--muted);cursor:pointer;transition:all .2s}
.tab:hover{border-color:var(--accent);color:var(--accent)}
.tab.active{background:var(--accent);border-color:var(--accent);color:#fff}
[data-theme="dark"] .tab.active{color:#1a120c}
.bars{display:flex;flex-direction:column;gap:22px}
.barrow{display:grid;grid-template-columns:150px 1fr;gap:18px;align-items:center}
.barrow__m{font-family:var(--ff-mono);font-size:.789rem;color:var(--fg);line-height:1.4}
.barpair{display:flex;flex-direction:column;gap:7px}
.bar{position:relative;height:24px;background:var(--bg2);overflow:hidden}
.bar i{position:absolute;left:0;top:0;bottom:0;width:0;transition:width 1s cubic-bezier(.2,.7,.2,1)}
.bar.van i{background:repeating-linear-gradient(45deg,var(--muted),var(--muted) 6px,transparent 6px,transparent 11px);opacity:.5}
.bar.ours i{background:linear-gradient(90deg,var(--accent),var(--accent2))}
.bar b{position:absolute;right:8px;top:50%;transform:translateY(-50%);font-family:var(--ff-mono);font-size:.789rem;color:var(--fg);z-index:2}
.bar__tag{position:absolute;left:8px;top:50%;transform:translateY(-50%);font-family:var(--ff-mono);font-size:.632rem;letter-spacing:.1em;text-transform:uppercase;color:var(--fg);opacity:.65;z-index:2}
.chart__legend{display:flex;gap:24px;flex-wrap:wrap;margin-top:26px;font-family:var(--ff-mono);font-size:.737rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.chart__legend span{display:inline-flex;align-items:center;gap:8px}
.swatch{width:22px;height:11px;display:inline-block}
.swatch.van{background:repeating-linear-gradient(45deg,var(--muted),var(--muted) 5px,transparent 5px,transparent 9px);opacity:.6}
.swatch.ours{background:linear-gradient(90deg,var(--accent),var(--accent2))}
@media(max-width:620px){.barrow{grid-template-columns:1fr}.barrow__m{margin-bottom:2px}}

/* ---------- dataset composition ---------- */
.comp{margin-top:36px;background:var(--card);border:1px solid var(--line);padding:clamp(20px,3vw,34px)}
.comp__tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:28px}
.comp__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media(max-width:880px){.comp__grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.comp__grid{grid-template-columns:1fr}}
.comp__cell{border:1px solid var(--line);background:var(--bg);padding:20px 18px}
.comp__k{font-family:var(--ff-mono);font-size:.632rem;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);margin-bottom:10px}
.comp__v{font-family:var(--ff-display);font-weight:700;font-size:1.684rem;line-height:1;color:var(--fg)}
.comp__v small{font-size:.5em;color:var(--muted);font-weight:400;margin-left:6px;font-family:var(--ff-mono)}
.comp__d{font-size:.842rem;color:var(--muted);margin:10px 0 0;line-height:1.6}
.stackbar{display:flex;height:44px;background:var(--bg2);margin-top:26px;overflow:hidden;border:1px solid var(--line)}
.stackbar div{display:flex;align-items:center;justify-content:center;font-family:var(--ff-mono);font-size:.7rem;color:#fff;
  transition:width .9s cubic-bezier(.2,.7,.2,1),filter .2s;overflow:hidden;white-space:nowrap}
.stackbar div:hover{filter:brightness(1.12)}
.stackkey{display:flex;flex-wrap:wrap;gap:18px;margin-top:16px;font-family:var(--ff-mono);font-size:.737rem;color:var(--muted)}
.stackkey span{display:inline-flex;align-items:center;gap:8px}
.stackkey i{width:12px;height:12px;display:inline-block}

/* ---------- taxonomy ---------- */
.tax{margin-top:36px;background:var(--card);border:1px solid var(--line);padding:clamp(20px,3vw,34px)}
.tax__row{display:grid;grid-template-columns:210px 1fr 74px;gap:14px;align-items:center;padding:7px 0;border-bottom:1px solid var(--line)}
.tax__row:last-of-type{border-bottom:0}
.tax__k{font-size:.9rem;color:var(--fg);line-height:1.4}
.tax__track{display:flex;height:22px;background:var(--bg2);overflow:hidden}
.tax__track i{height:100%;width:0;transition:width .8s cubic-bezier(.2,.7,.2,1)}
.tax__track i.a{background:var(--st-stable)}
.tax__track i.w{background:var(--accent2)}
.tax__track i.s{background:var(--st-trial)}
.tax__v{font-family:var(--ff-mono);font-size:.789rem;color:var(--muted);text-align:right}
@media(max-width:700px){.tax__row{grid-template-columns:130px 1fr 60px}.tax__k{font-size:.8rem}}

/* ---------- lineage explorer ---------- */
.lin{margin-top:40px}
.lin__tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:26px}
.lin__card{border:1px solid var(--line);background:var(--card);padding:clamp(20px,3vw,32px)}
.lin__env{font-family:var(--ff-mono);font-size:.632rem;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);margin-bottom:8px}
.lin__root{display:flex;flex-wrap:wrap;align-items:baseline;gap:12px;margin-bottom:22px}
.lin__rootname{font-family:var(--ff-display);font-weight:700;font-size:1.221rem;letter-spacing:-.01em}
.lin__meta{font-family:var(--ff-mono);font-size:.737rem;color:var(--muted);letter-spacing:.06em}
.lin__children{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:760px){.lin__children{grid-template-columns:1fr}}
.lin__child{border:1px solid var(--line);background:var(--bg);padding:18px 20px 22px;transition:border-color .3s,transform .3s}
.lin__child:hover{transform:translateY(-3px)}
.lin__child.win{border-color:rgba(33,114,181,.45)}
.lin__child.lose{border-color:rgba(214,39,39,.4)}
.lin__badge{display:inline-block;font-family:var(--ff-mono);font-size:.632rem;letter-spacing:.14em;
  text-transform:uppercase;padding:4px 9px;color:#fff;margin-bottom:12px}
.lin__child.win .lin__badge{background:var(--st-stable)}
.lin__child.lose .lin__badge{background:var(--st-retired)}
.lin__cname{font-family:var(--ff-display);font-weight:600;font-size:1rem;margin:0 0 12px;line-height:1.3}
.lin__fit{display:flex;align-items:center;gap:10px;margin-bottom:12px;font-family:var(--ff-mono);font-size:.737rem;color:var(--muted)}
.lin__fitbar{flex:1;height:7px;background:var(--bg2);position:relative}
.lin__fitbar i{position:absolute;left:0;top:0;bottom:0;width:0;transition:width .8s cubic-bezier(.2,.7,.2,1)}
.lin__child.win .lin__fitbar i{background:var(--st-stable)}
.lin__child.lose .lin__fitbar i{background:var(--st-retired)}
.lin__principle{font-size:.921rem;color:var(--muted);line-height:1.65;margin:0}
.lin__principle b{color:var(--fg)}
.lin__delta{font-family:var(--ff-mono);font-size:.789rem;margin-top:12px;line-height:1.6}
.lin__child.win .lin__delta{color:var(--st-stable)}
.lin__child.lose .lin__delta{color:var(--st-retired)}

/* ---------- bibtex ---------- */
.cite{position:relative;background:#0c0805;border:1px solid rgba(255,255,255,.1)}
[data-theme="light"] .cite{background:#1a140f}
.cite pre{margin:0;padding:26px 28px;overflow-x:auto;color:#d8cdbf;font-family:var(--ff-mono);font-size:.842rem;line-height:1.7}
.cite .copy{position:absolute;top:14px;right:14px}

/* ---------- footer ---------- */
.foot{border-top:1px solid var(--line);padding:60px clamp(20px,5vw,40px);max-width:var(--maxw);margin:0 auto;
  display:flex;flex-wrap:wrap;gap:24px;justify-content:space-between;align-items:center}
.foot__l{font-family:var(--ff-mono);font-size:.789rem;letter-spacing:.06em;color:var(--muted);line-height:1.8}
.foot a{color:var(--accent)}
.foot__links{display:flex;gap:18px;flex-wrap:wrap;font-family:var(--ff-mono);font-size:.789rem;letter-spacing:.1em;text-transform:uppercase}

/* ---------- keyframes ---------- */
@keyframes rise{from{opacity:0;transform:translateY(26px)}to{opacity:1;transform:none}}
@keyframes wipe2{to{background-size:100% .12em}}
@keyframes cue{0%,100%{opacity:.3;transform:scaleY(.6)}50%{opacity:1;transform:scaleY(1)}}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1!important;transform:none!important}
  .hero h1 .hl{animation:none;background-size:100% .12em}
  .scrollcue span{animation:none}
}

/* ============================================================
   Light mode: hero + teaser become warm light panels, matching
   the GraphDO page. Chart plates stay white in both themes.
   ============================================================ */
[data-theme="light"] .hero{
  background:radial-gradient(ellipse 92% 72% at 50% 16%,#fdfaf5 0%,#f4ecdf 52%,#e8d8c2 100%);
  color:var(--fg);
  --hero-halo:rgba(247,241,231,.9);
}
[data-theme="light"] .hero__vign{background:radial-gradient(ellipse at center,transparent 56%,rgba(120,86,52,.10) 100%)}
[data-theme="light"] .hero h1{color:#1f1a14}
[data-theme="light"] .hero__sub{color:var(--muted)}
[data-theme="light"] .hero__authors{color:#4a4036}
[data-theme="light"] .hero__authors a{color:#4a4036}
[data-theme="light"] .hero__authors a:hover{color:var(--accent)}
[data-theme="light"] .hero__aff{color:#8a7d6c}
[data-theme="light"] .hero__corr{color:#9b8f80}
[data-theme="light"] .scrollcue{color:#8a7d6c}
[data-theme="light"] .btn{border-color:var(--line);color:var(--fg);background:color-mix(in srgb,var(--card) 55%,transparent)}
[data-theme="light"] .btn:hover{background:var(--accent);border-color:var(--accent);color:#fff}
[data-theme="light"] .btn--solid{background:var(--accent);border-color:var(--accent);color:#fff}
[data-theme="light"] .btn--solid:hover{background:var(--accent2);border-color:var(--accent2);color:#fff}
[data-theme="light"] .btn--pending{border-color:var(--line);color:#8a7d6c}
[data-theme="light"] .btn--pending:hover{background:transparent;border-color:var(--line);color:#8a7d6c}
[data-theme="light"] .nav:not(.solid) .nav__brand,
[data-theme="light"] .nav:not(.solid) .nav__links a,
[data-theme="light"] .nav:not(.solid) .icon-btn{color:var(--fg)}
[data-theme="light"] .nav:not(.solid) .icon-btn{border-color:var(--line)}
[data-theme="light"] .nav:not(.solid) .nav__links a:hover,
[data-theme="light"] .nav:not(.solid) .nav__links a.active{color:var(--accent)}
[data-theme="light"] .nav:not(.solid) .icon-btn:hover{border-color:var(--accent);color:var(--accent)}
[data-theme="light"] .teaser{background:radial-gradient(ellipse 110% 130% at 50% 0%,#f8f0e3 0%,#efe2cf 60%,#e7d9c2 100%);color:var(--fg)}
[data-theme="light"] .teaser p{color:var(--muted)}
[data-theme="light"] .teaser p strong{color:var(--accent)}
[data-theme="light"] .teaser__plate{background:rgba(255,255,255,.72);border-color:rgba(28,26,22,.12);box-shadow:0 24px 60px rgba(120,86,52,.16)}