/* ══════════════════════════════════════════════════════════════════════════
   PRISM · project page
   Palette carried over from the demo video:
     bg #0B0E14 · V-I #9B8CF5 · V-V #F0A868 · s #FF7BA9 · language #57D9C0
   ══════════════════════════════════════════════════════════════════════════ */

:root{
  --bg:        #0B0E14;
  --bg-alt:    #0D1119;
  --surface:   #12161F;
  --surface-2: #171C27;
  --line:      rgba(237,239,242,.10);
  --line-2:    rgba(237,239,242,.06);

  --vi:   #9B8CF5;
  --vv:   #F0A868;
  --s:    #FF7BA9;
  --lang: #57D9C0;
  --bad:  #FF5C5C;
  --good: #5BE39A;

  --text:  #EDEFF2;
  --muted: #8A93A3;
  --dim:   #5C6675;

  --sans: 'Inter', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto,
          'Helvetica Neue', 'Noto Sans KR', Arial, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --serif: 'Iowan Old Style', 'Palatino Linotype', Palatino, 'Times New Roman',
           'Nimbus Roman', Georgia, serif;

  --r-sm: 8px; --r: 14px; --r-lg: 20px;
  --maxw: 1180px;
  --ease: cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; scroll-padding-top:84px; -webkit-text-size-adjust:100%; }
body{
  margin:0; background:var(--bg); color:var(--text);
  font-family:var(--sans); font-size:16px; line-height:1.65;
  -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
h1,h2,h3{ margin:0; line-height:1.15; letter-spacing:-.022em; font-weight:800; }
p{ margin:0 0 1em; }
sup,sub{ font-size:.68em; line-height:0; }
::selection{ background:rgba(155,140,245,.35); color:#fff; }

.wrap{ width:min(100% - 44px, var(--maxw)); margin-inline:auto; }
.wrap-narrow{ width:min(100% - 44px, 860px); margin-inline:auto; }
.mono{ font-family:var(--mono); font-size:.86em; }
.dim{ color:var(--dim); font-weight:400; }
.off{ color:var(--dim); }
.gk{ font-family:var(--serif); font-style:italic; }
.c-vi{ color:var(--vi); } .c-vv{ color:var(--vv); }
.c-s{ color:var(--s); }   .c-lang{ color:var(--lang); }

/* ── wordmark ─────────────────────────────────────────────────────────── */
.wordmark{
  font-weight:900; letter-spacing:-.045em;
  background:linear-gradient(100deg,#9B8CF5 0%,#B98CE8 26%,#FF7BA9 55%,#F0A868 88%);
  -webkit-background-clip:text; background-clip:text;
  -webkit-text-fill-color:transparent; color:transparent;
}
.wordmark-sm{ font-size:1.06rem; letter-spacing:-.02em; }
.wordmark-inline{ font-size:1em; }

@keyframes panelin{ from{ opacity:0; transform:translateY(12px);} to{ opacity:1; transform:none; } }

/* ── reveal ───────────────────────────────────────────────────────────── */
/* Guarded by .js so the page stays fully readable if the script never runs. */
.js .reveal{ opacity:0; transform:translateY(18px); }
.reveal.is-in{ opacity:1; transform:none; transition:opacity .7s var(--ease), transform .7s var(--ease); }

/* ══════════════════════════════════ NAV ═════════════════════════════════ */
.nav{
  position:fixed; inset:0 0 auto 0; z-index:60;
  background:rgba(11,14,20,.72); backdrop-filter:blur(14px) saturate(150%);
  -webkit-backdrop-filter:blur(14px) saturate(150%);
  border-bottom:1px solid transparent; transition:border-color .3s, background .3s;
}
.nav.is-stuck{ border-bottom-color:var(--line-2); background:rgba(11,14,20,.88); }
.nav-inner{
  width:min(100% - 44px, var(--maxw)); margin-inline:auto;
  height:62px; display:flex; align-items:center; gap:26px;
}
.nav-links{ display:flex; gap:24px; list-style:none; margin:0; padding:0; margin-left:auto; }
.nav-links a{
  font-size:.845rem; font-weight:500; color:var(--muted);
  transition:color .2s; position:relative; padding-block:6px;
}
.nav-links a:hover{ color:var(--text); }
.nav-links a.is-active{ color:var(--text); }
.nav-links a.is-active::after{
  content:''; position:absolute; left:0; right:0; bottom:0; height:1.5px;
  background:linear-gradient(90deg,var(--vi),var(--s),var(--vv));
}
.nav-cta{ display:flex; gap:8px; }
.nav-progress{
  height:1.5px; width:0%;
  background:linear-gradient(90deg,var(--vi),var(--s),var(--vv));
  transition:width .1s linear;
}

/* ── buttons ──────────────────────────────────────────────────────────── */
.btn{
  display:inline-flex; align-items:center; gap:8px;
  padding:11px 18px; border-radius:999px; border:1px solid var(--line);
  font-size:.9rem; font-weight:600; letter-spacing:-.01em;
  transition:transform .18s var(--ease), background .2s, border-color .2s, color .2s;
  white-space:nowrap;
}
.btn:hover{ transform:translateY(-2px); }
.btn-sm{ padding:7px 14px; font-size:.82rem; }
.btn-ghost{ background:rgba(237,239,242,.04); color:var(--text); }
.btn-ghost:hover{ background:rgba(237,239,242,.09); border-color:rgba(237,239,242,.2); }
.btn-solid{
  background:linear-gradient(100deg,#9B8CF5,#C48CE0 45%,#FF7BA9);
  color:#0B0E14; border-color:transparent;
}
.btn-solid:hover{ box-shadow:0 8px 26px -10px rgba(255,123,169,.7); }
.btn-todo{
  background:transparent; color:var(--muted);
  border-style:dashed; border-color:rgba(237,239,242,.22);
}
.btn-todo em{ font-style:normal; color:var(--dim); font-weight:500; font-size:.86em; }
.btn-todo:hover{ color:var(--text); border-color:rgba(237,239,242,.4); }
.ico{ width:16px; height:16px; fill:none; stroke:currentColor; stroke-width:1.8;
      stroke-linecap:round; stroke-linejoin:round; flex:none; }
.btn-solid .ico{ stroke-width:2; }
/* Brand marks are Simple Icons glyphs (CC0-1.0) inlined into the markup, so the page
   still makes no external requests. Both are monochrome and get tinted here. The arXiv
   red is lifted from #B31B1B to #D62828 to clear 3:1 against the page background. */
.ico-arxiv{ width:17px; height:17px; fill:#D62828; stroke:none; }
.ico-hf{ width:18px; height:18px; fill:#FFD21E; stroke:none; }
.hero-cta .btn:last-child .ico{ fill:currentColor; stroke:none; }

/* ══════════════════════════════════ HERO ════════════════════════════════ */
.hero{
  position:relative; padding:150px 0 34px; overflow:hidden;
  background:
    radial-gradient(900px 460px at 50% -8%, rgba(155,140,245,.16), transparent 62%),
    radial-gradient(720px 380px at 88% 12%, rgba(240,168,104,.09), transparent 60%),
    var(--bg);
}
.hero::after{
  content:''; position:absolute; inset:auto 0 0 0; height:180px;
  background:linear-gradient(to bottom, transparent, var(--bg)); pointer-events:none;
}
.hero-inner{ position:relative; z-index:2; width:min(100% - 44px, 940px); margin-inline:auto; text-align:center; }

.venue-line{
  margin:30px 0 0; font-size:.78rem; font-weight:600; letter-spacing:.14em;
  text-transform:uppercase; color:var(--muted);
}

.hero-title{ margin:0; }
.hero-title .wordmark{ font-size:clamp(4.2rem, 13vw, 9rem); line-height:.92; display:inline-block; }
.hero-expand{
  margin:16px 0 4px; font-size:clamp(1rem, 2.2vw, 1.32rem);
  font-weight:600; letter-spacing:-.015em; color:var(--text);
}
.hero-expand b{ font-weight:800; }
.hero-sub{
  margin:0 0 34px; font-size:clamp(.95rem, 1.8vw, 1.12rem);
  color:var(--muted); font-weight:500;
}

.authors{ display:flex; flex-wrap:wrap; justify-content:center; gap:6px 20px; font-size:1.02rem; font-weight:600; }
.authors a{ border-bottom:1px solid transparent; transition:border-color .2s, color .2s; }
.authors a:hover{ color:var(--vi); border-bottom-color:var(--vi); }
.authors sup{ color:var(--vi); font-weight:700; }
.affils{ display:flex; flex-wrap:wrap; justify-content:center; gap:4px 22px;
  margin-top:9px; font-size:.93rem; color:var(--muted); }
.affils sup{ color:var(--vi); }
.notes{ display:flex; flex-wrap:wrap; justify-content:center; gap:2px 18px;
  margin-top:8px; font-size:.79rem; color:var(--dim); }

.hero-cta{ display:flex; flex-wrap:wrap; justify-content:center; gap:10px; margin-top:34px; }

.abstract{
  position:relative; z-index:2;
  width:min(100% - 44px, 820px); margin:80px auto 0; padding:32px 34px 34px;
  background:linear-gradient(180deg, rgba(23,28,39,.9), rgba(18,22,31,.6));
  border:1px solid var(--line); border-radius:var(--r-lg);
}
.abs-h{
  font-size:.74rem; letter-spacing:.18em; text-transform:uppercase;
  color:var(--muted); font-weight:700; margin-bottom:14px;
}
.abstract p{ margin:0; font-size:1.005rem; line-height:1.78; color:#D7DBE2; }
.abstract em{ color:var(--text); font-style:italic;
  background:linear-gradient(transparent 64%, rgba(155,140,245,.24) 64%); }

/* ══════════════════════════════ SECTION SHELL ═══════════════════════════ */
.section{ padding:110px 0; position:relative; }
.section-alt{ background:var(--bg-alt); }
.section-alt::before, .section-alt::after{
  content:''; position:absolute; left:0; right:0; height:1px;
  background:linear-gradient(90deg, transparent, rgba(155,140,245,.28), rgba(255,123,169,.28), rgba(240,168,104,.28), transparent);
}
.section-alt::before{ top:0; } .section-alt::after{ bottom:0; }

.sec-head{ max-width:860px; margin-bottom:52px; }
.sec-head.sub{ margin-top:92px; margin-bottom:34px; }
.sec-kicker{
  display:inline-block; font-family:var(--mono); font-size:.74rem;
  letter-spacing:.2em; text-transform:uppercase; color:var(--vi);
  margin-bottom:16px;
}
.sec-kicker::before{
  content:''; display:inline-block; width:20px; height:1px; margin-right:10px;
  background:var(--dim); vertical-align:middle;
}
.sec-title{ font-size:clamp(1.75rem, 4vw, 2.7rem); }
.sec-title.sm{ font-size:clamp(1.3rem, 2.6vw, 1.7rem); }
.sec-lede{ margin-top:18px; font-size:1.05rem; line-height:1.75; color:var(--muted); }
.sec-lede i{ color:#C3C9D3; }

.tag{
  display:inline-block; font-family:var(--mono); font-size:.76em; font-weight:700;
  padding:1px 6px; border-radius:5px; letter-spacing:-.01em; white-space:nowrap;
  transform:translateY(-1px);
}
.tag-vi{ color:var(--vi); background:rgba(155,140,245,.14); }
.tag-vv{ color:var(--vv); background:rgba(240,168,104,.14); }

/* ══════════════════════════════════ DEMO ════════════════════════════════ */
.video-shell{
  margin:0; padding:12px; border-radius:var(--r-lg);
  background:linear-gradient(140deg, rgba(155,140,245,.22), rgba(255,123,169,.14) 45%, rgba(240,168,104,.18));
  box-shadow:0 40px 90px -40px rgba(0,0,0,.9);
}
.video-shell video{
  width:100%; height:auto; display:block; border-radius:12px;
  background:#000; aspect-ratio:16/9;
}
/* ═══════════════════════════════ INSIGHT ════════════════════════════════ */
.clipcard{ text-align:center; }
.clipcard-img{
  width:100%; max-width:210px; margin-inline:auto; aspect-ratio:1/1.06;
  object-fit:cover; border-radius:10px; border:1px solid var(--line);
}
.clipcard.sm .clipcard-img{ max-width:150px; }
.capline{
  margin-top:11px; font-size:.86rem; line-height:1.6; font-weight:600;
  display:inline-block;
}
.hl{ padding:1px 5px; border-radius:4px; }
.hl-vi{ color:#0B0E14; background:var(--vi); }
.hl-vv{ color:#0B0E14; background:var(--vv); }
.capline-target{
  padding:8px 12px; border-radius:9px; background:rgba(87,217,192,.08);
  border:1px dashed rgba(87,217,192,.4);
}

.down-rail{ display:grid; gap:26px; margin:14px 0; }
.down-rail.one{ grid-template-columns:1fr; }
.down-rail i{
  display:block; height:26px; width:1px; margin-inline:auto;
  background:linear-gradient(to bottom, rgba(237,239,242,.05), rgba(237,239,242,.4));
  position:relative;
}
.down-rail i::after{
  content:''; position:absolute; bottom:-1px; left:50%; transform:translateX(-50%);
  border:4px solid transparent; border-top-color:rgba(237,239,242,.4);
}

.modbox{
  text-align:center; padding:14px 22px; border-radius:12px;
  font-weight:700; font-size:.98rem; letter-spacing:-.01em;
  border:1px solid var(--line); background:var(--surface-2);
}
.modbox.sm{ padding:10px 16px; font-size:.86rem; }
.modbox-theta{ border-color:rgba(155,140,245,.4); background:rgba(155,140,245,.10); color:#D6CEFF; }
.modbox-phi{ border-color:rgba(255,123,169,.4); background:rgba(255,123,169,.10); color:#FFCEDE; }
.modbox-ema{ border-color:rgba(237,239,242,.2); background:rgba(237,239,242,.05); color:var(--muted); }

.chiprow{ display:flex; gap:5px; justify-content:center; flex-wrap:wrap; margin-bottom:6px; }
.chiprow.center{ justify-content:center; }
.chip{
  width:21px; height:21px; border-radius:6px; display:inline-block;
  transition:opacity .3s, filter .3s;
}
.chip-vi{ background:var(--vi); box-shadow:inset 0 -6px 10px -6px rgba(0,0,0,.55); }
.chip-vv{ background:var(--vv); box-shadow:inset 0 -6px 10px -6px rgba(0,0,0,.55); }
.chip-s{ background:var(--s); }
.chip-lang{ background:var(--lang); }
.chip.is-off{ opacity:.18; filter:grayscale(.7); }
.chip-pred{ background:transparent !important; border:1.5px dashed currentColor; }
.chip-pred.chip-vi{ color:var(--vi); } .chip-pred.chip-vv{ color:var(--vv); }
.slot-label{ font-family:var(--mono); font-size:.76rem; color:var(--muted); margin-top:4px; }

.cross-svg{ position:relative; height:66px; margin:2px 0 6px; }
.cross-svg svg{ width:100%; height:100%; display:block; }
.cross-svg svg path{ fill:none; stroke-width:1.4; }
.cross-tag{
  position:absolute; left:50%; top:50%; transform:translate(-50%,-50%);
  font-family:var(--mono); font-size:.72rem; color:var(--muted);
  background:var(--surface); padding:3px 10px; border-radius:999px;
  border:1px solid var(--line); white-space:nowrap;
}

.align-row{ display:grid; grid-template-columns:1fr auto 1fr; align-items:center; gap:18px; margin-top:18px; }
.align-row.compact{ gap:10px; margin-top:14px; }
.align-build{ align-items:end; gap:14px; margin-top:0; }
.align-build .align-mid{ padding-bottom:24px; }
.align-build .down-rail{ margin:8px 0; }
.lang-row{ display:flex; align-items:center; justify-content:center; gap:7px; font-family:var(--serif); }
.lang-chip{ padding:3px 8px; border-radius:7px; background:rgba(87,217,192,.08);
  border:1px solid rgba(87,217,192,.28); font-style:italic; font-size:.9rem; }
.oplus{ color:var(--muted); }
.align-build .capline-target{ margin-top:9px; font-size:.78rem; }
.modbox-lang{ border-color:rgba(87,217,192,.4); background:rgba(87,217,192,.09); color:#A8EEE0; }
.align-side{ text-align:center; }
.align-mid{ display:flex; flex-direction:column; align-items:center; gap:2px; }
.align-arrow{ font-size:1.3rem; color:var(--lang); line-height:1; }
.align-word{ font-family:var(--mono); font-size:.72rem; color:var(--muted); }

.pull{
  margin:56px 0 0; padding:34px 36px; border-radius:var(--r-lg);
  border:1px solid rgba(155,140,245,.25);
  background:linear-gradient(120deg, rgba(155,140,245,.10), rgba(255,123,169,.05) 60%, transparent);
}
.pull-kicker{
  display:block; font-family:var(--mono); font-size:.72rem; letter-spacing:.2em;
  text-transform:uppercase; color:var(--vi); margin-bottom:12px;
}
.pull p{ margin:0; font-size:clamp(1.05rem, 2.1vw, 1.32rem); line-height:1.66; font-weight:500; }
.pull b{ font-weight:700; color:#fff; }

.why-h{ margin:44px 0 18px; font-size:1.18rem; font-weight:700; }
.why-lang{ display:grid; grid-template-columns:1fr 1fr; gap:20px; margin-top:22px; }
.why-card{ padding:26px 26px 22px; border-radius:var(--r);
  background:var(--surface); border:1px solid var(--line); }
.why-ico{ font-size:1.3rem; line-height:1; margin-bottom:12px; }
.why-card h3{ font-size:1.05rem; font-weight:700; margin-bottom:9px; }
.why-card p{ margin:0; font-size:.93rem; line-height:1.72; color:var(--muted); }

/* ─ paper figure on a light card ─ */
.paper-fig{ margin:56px 0 0; }
.paper-fig img{
  width:100%; border-radius:var(--r); background:#fff; padding:18px;
  border:1px solid var(--line); cursor:zoom-in;
  transition:transform .3s var(--ease), box-shadow .3s;
}
.paper-fig img:hover{ transform:translateY(-3px); box-shadow:0 26px 60px -30px rgba(0,0,0,.9); }
.paper-fig figcaption{
  margin-top:16px; font-size:.88rem; line-height:1.7; color:var(--muted);
  max-width:900px;
}
.paper-fig figcaption b{ color:#C9CFD9; }
.paper-fig.wide img{ padding:22px; }
.paper-fig.wide figcaption{ max-width:none; }
.fig-teaser img{ max-width:560px; margin-inline:auto; }
.gallery .paper-fig{ margin-top:40px; }

/* ═══════════════════════════════ METHOD ═════════════════════════════════ */
.stepper{ margin-top:8px; }
.step-nav{ display:grid; grid-template-columns:repeat(3,1fr); gap:12px; margin-bottom:26px; }
.step-btn{
  position:relative; text-align:left; cursor:pointer; appearance:none;
  font-family:var(--sans); padding:20px 22px 18px; border-radius:var(--r);
  background:var(--surface); border:1px solid var(--line); color:var(--text);
  display:flex; flex-direction:column; gap:3px; overflow:hidden;
  transition:background .25s, border-color .25s, transform .25s var(--ease);
}
.step-btn::before{
  content:''; position:absolute; inset:0 0 auto 0; height:2px;
  background:linear-gradient(90deg,var(--vi),var(--s),var(--vv));
  transform:scaleX(0); transform-origin:left; transition:transform .4s var(--ease);
}
.step-btn:hover{ border-color:rgba(237,239,242,.2); transform:translateY(-2px); }
.step-btn.is-on{ background:var(--surface-2); border-color:rgba(155,140,245,.34); }
.step-btn.is-on::before{ transform:scaleX(1); }
.step-n{ font-family:var(--mono); font-size:.74rem; color:var(--vi); letter-spacing:.1em; }
.step-t{ font-size:1.06rem; font-weight:700; letter-spacing:-.02em; }
.step-d{ font-size:.83rem; color:var(--muted); line-height:1.55; }

.step-panel{ display:none; }
.step-panel.is-on{ display:block; animation:panelin .45s var(--ease); }
.step-body{
  display:grid; grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr); gap:34px;
  padding:34px 32px; border-radius:var(--r-lg);
  background:linear-gradient(180deg,var(--surface-2),var(--surface));
  border:1px solid var(--line);
}
.step-text h3{ font-size:1.14rem; font-weight:700; margin:26px 0 12px; }
.step-text h3:first-child{ margin-top:0; }
.step-text p{ font-size:.955rem; line-height:1.76; color:#C3C9D3; }
.step-text .micro{ font-size:.86rem; color:var(--muted); line-height:1.7; }

.callout{
  margin-top:20px; padding:15px 18px; border-radius:11px; font-size:.9rem;
  line-height:1.7; color:#C9CFD9;
}
.callout-vi{ background:rgba(155,140,245,.07); border-left:2px solid var(--vi); }
.callout-vv{ background:rgba(240,168,104,.07); border-left:2px solid var(--vv); }

/* ─ equations ─ */
.eq{
  display:flex; align-items:center; gap:12px; margin:16px 0 20px;
  padding:15px 18px; border-radius:11px;
  background:rgba(11,14,20,.6); border:1px solid var(--line-2);
  font-family:var(--serif); font-size:1.05rem; overflow-x:auto;
}
.eq-tall{ font-size:1rem; }
.eq-b{ flex:1; white-space:nowrap; }
.eq-n{ font-family:var(--sans); font-size:.78rem; color:var(--dim); flex:none; }
.mi{ font-style:italic; }
.mtxt{ font-family:var(--sans); font-style:normal; font-size:.62em; }
.brk{ font-size:1.5em; vertical-align:-.22em; color:var(--muted); }
.s-vi{ color:var(--vi); font-style:normal; font-size:.6em; font-family:var(--mono); }
.s-vv{ color:var(--vv); font-style:normal; font-size:.6em; font-family:var(--mono); }
.frac{ display:inline-flex; flex-direction:column; vertical-align:middle; text-align:center;
  margin:0 5px; font-size:.9em; }
.frac .num{ padding:0 6px 3px; }
.frac .den{ padding:3px 6px 0; border-top:1px solid rgba(237,239,242,.45); }

/* ─ method vizzes ─ */
.step-viz{ align-self:start; position:sticky; top:88px; }
.viz{ padding:24px 22px; border-radius:var(--r);
  background:rgba(11,14,20,.55); border:1px solid var(--line-2); }
.viz-row{ display:flex; justify-content:center; }
.viz-row.two-col{ display:grid; grid-template-columns:1fr 1fr; gap:18px; }
.viz-row.tight{ gap:12px; margin-top:14px; }
.mini{ text-align:center; }
.mini-h{ font-size:.82rem; font-weight:700; color:var(--muted); margin-bottom:10px; }

/* width:max-content + auto margins centre the chip rows on the column, and the
   stream label hangs outside them so it never shifts the chips off centre. */
.tracks{ display:flex; flex-direction:column; gap:9px; width:max-content; margin-inline:auto; }
.tracks .track{ display:flex; align-items:center; gap:5px; position:relative; }
.tracks .track-lab{
  position:absolute; right:100%; top:50%; transform:translateY(-50%);
  margin-right:10px; text-align:right; white-space:nowrap;
}
.track.sm{ display:flex; align-items:center; gap:4px; justify-content:center; margin-bottom:7px; }
.track.off .track-lab{ color:var(--dim); }
.track-lab{ font-family:var(--mono); font-size:.7rem; flex:none; color:var(--muted); }
.track .chip{ width:19px; height:19px; }
.axis{ display:flex; align-items:center; gap:8px; margin-top:2px;
  font-family:var(--mono); font-size:.68rem; color:var(--dim); }
.axis-line{ flex:1; height:1px; background:linear-gradient(90deg,var(--line),transparent); }

.pred-legend{ display:flex; gap:18px; justify-content:center; margin-top:14px;
  font-family:var(--mono); font-size:.7rem; color:var(--muted); }
.pred-legend span{ display:inline-flex; align-items:center; gap:6px; }
.sw{ width:13px; height:13px; border-radius:4px; display:inline-block; }
.sw-solid{ background:var(--vi); }
.sw-dash{ border:1.5px dashed var(--vi); }

.footnote{
  margin:26px 0 0; font-size:.84rem; line-height:1.7; color:var(--dim);
  padding-left:16px; border-left:2px solid var(--line);
}

/* ═══════════════════════════════ RESULTS ════════════════════════════════ */
.stats{ display:grid; grid-template-columns:repeat(4,1fr); gap:16px; margin-bottom:44px; }
.stat{
  padding:24px 22px; border-radius:var(--r); position:relative; overflow:hidden;
  background:linear-gradient(180deg,var(--surface-2),var(--surface));
  border:1px solid var(--line);
}
.stat::after{
  content:''; position:absolute; inset:auto 0 0 0; height:2px;
  background:linear-gradient(90deg,var(--vi),var(--s));
  opacity:.7;
}
.stat-v{ font-size:2.5rem; font-weight:800; letter-spacing:-.04em; line-height:1;
  font-variant-numeric:tabular-nums;
  background:linear-gradient(100deg,#fff,#CFC6FF 70%);
  -webkit-background-clip:text; background-clip:text; -webkit-text-fill-color:transparent; }
.stat-k{ margin-top:11px; font-size:.85rem; font-weight:600; color:var(--muted); line-height:1.5; }
.stat-d{ margin-top:9px; font-size:.79rem; font-weight:700; font-family:var(--mono); }
.stat-d.up{ color:var(--good); }

.tab-nav{ display:flex; flex-wrap:wrap; gap:8px; margin-bottom:20px; }
.tab-btn{
  appearance:none; cursor:pointer; font-family:var(--sans); font-size:.88rem; font-weight:600;
  padding:10px 18px; border-radius:999px; border:1px solid var(--line);
  background:var(--surface); color:var(--muted); transition:all .22s var(--ease);
}
.tab-btn:hover{ color:var(--text); border-color:rgba(237,239,242,.22); }
.tab-btn.is-on{ color:#0B0E14; background:linear-gradient(100deg,#9B8CF5,#FF7BA9); border-color:transparent; }
.tab-panel{ display:none; }
.tab-panel.is-on{ display:block; animation:panelin .4s var(--ease); }

.tbl-wrap{
  overflow-x:auto; border-radius:var(--r); border:1px solid var(--line);
  background:var(--surface);
  -webkit-overflow-scrolling:touch;
}
.tbl{ border-collapse:collapse; width:100%; min-width:900px;
  font-size:.83rem; font-variant-numeric:tabular-nums; }
.tbl th, .tbl td{ padding:7px 9px; text-align:center; white-space:nowrap; }
.tbl thead th{
  font-weight:700; font-size:.76rem; color:var(--muted);
  border-bottom:1px solid var(--line); background:rgba(11,14,20,.5);
}
.tbl thead tr:first-child th{ font-size:.8rem; }
.tbl .grp{ color:var(--text); letter-spacing:.02em; }
.tbl .grp-a{ background:rgba(155,140,245,.10); }
.tbl .grp-b{ background:rgba(240,168,104,.08); }
.tbl .th-m{ text-align:left; padding-left:16px; font-weight:600; color:var(--text);
  position:sticky; left:0; background:var(--surface); z-index:2; }
.tbl thead .th-m{ background:rgba(11,14,20,.86); z-index:4; }
.tbl tbody tr{ border-bottom:1px solid var(--line-2); }
.tbl tbody tr:last-child{ border-bottom:0; }
.tbl tbody tr:hover td{ background:rgba(237,239,242,.032); }
.tbl tbody tr:hover .th-m{ background:#1a1f2b; }
.tbl .grp-row td{
  text-align:left; padding:9px 16px; font-size:.78rem; color:var(--muted);
  background:rgba(237,239,242,.035); letter-spacing:.02em;
}
.tbl .grp-row-ours td{ background:rgba(155,140,245,.10); color:#CFC6FF; }
.tbl td{ color:#B9C0CB; }
.tbl .b1{ color:#fff; font-weight:700; }
.tbl .s2{ color:#D3D8E0; text-decoration:underline; text-underline-offset:3px;
  text-decoration-color:rgba(237,239,242,.45); }
.tbl .na{ color:var(--dim); }
.tbl .mono{ font-family:var(--mono); font-size:.78rem; color:var(--muted); }
.tbl tr.ours{ background:linear-gradient(90deg, rgba(155,140,245,.13), rgba(255,123,169,.07)); }
.tbl tr.ours .th-m{ background:#1c1a33; color:#fff; font-weight:800; }
.tbl tr.ours td{ color:#E6E9EE; }
.tbl tr.ours:hover td{ background:rgba(155,140,245,.09); }
.tbl tr.indomain-best td{ color:#CBD1DA; }
.tbl tr.indomain-best .th-m{ font-weight:700; }
.tbl tr.sum-row td{ color:var(--muted); border-top:1px solid var(--line); }

.tbl-cap{ margin:14px 2px 0; font-size:.85rem; line-height:1.7; color:var(--muted); }
.tbl-cap b{ color:#C9CFD9; }
.best-key{ color:#fff; }
.second-key{ text-decoration:underline; text-underline-offset:3px; }
.tbl-note{
  margin:16px 0 0; padding:16px 20px; border-radius:11px; font-size:.89rem; line-height:1.72;
  color:var(--muted); background:rgba(237,239,242,.028); border:1px solid var(--line-2);
}
.tbl-note i{ color:#C3C9D3; }

.abl-grid{ display:grid; grid-template-columns:1fr; gap:38px; }
.abl-grid .tbl{ min-width:560px; }

.limits{
  margin-top:56px; border:1px solid var(--line); border-radius:var(--r);
  background:var(--surface); overflow:hidden;
}
.limits summary{
  cursor:pointer; padding:18px 22px; list-style:none; display:flex; align-items:center; gap:12px;
  font-weight:600; transition:background .2s;
}
.limits summary::-webkit-details-marker{ display:none; }
.limits summary::after{ content:'+'; margin-left:auto; color:var(--muted); font-size:1.2rem; }
.limits[open] summary::after{ content:'\2013'; }
.limits summary:hover{ background:rgba(237,239,242,.03); }
.lim-k{ font-family:var(--mono); font-size:.74rem; letter-spacing:.14em; text-transform:uppercase;
  color:var(--vv); }
.lim-h{ font-size:.88rem; color:var(--muted); font-weight:400; }
.limits-body{ padding:2px 22px 22px; font-size:.9rem; line-height:1.75; color:var(--muted); }
.limits-body b{ color:#C9CFD9; }

/* ═══════════════════════════════ FOOTER ═════════════════════════════════ */
.footer{ padding:52px 0 60px; border-top:1px solid var(--line-2); background:var(--bg-alt); }
.foot-grid{ display:flex; flex-wrap:wrap; gap:28px; justify-content:space-between; align-items:flex-start; }
.foot-note{ margin:10px 0 0; font-size:.86rem; color:var(--muted); line-height:1.6; }
.foot-meta{ text-align:right; font-size:.84rem; color:var(--muted); }
.foot-meta p{ margin:0 0 5px; }
.foot-credit{ color:var(--dim); font-size:.79rem; margin-top:12px !important; }
.foot-credit a{ color:var(--muted); border-bottom:1px solid var(--line); }
.foot-credit a:hover{ color:var(--vi); }

/* ══════════════════════════════ LIGHTBOX ════════════════════════════════ */
/* [hidden] must beat the display:flex below, or the overlay is stuck open. */
.lightbox[hidden]{ display:none; }
.lightbox{
  position:fixed; inset:0; z-index:100; display:flex; align-items:center; justify-content:center;
  background:rgba(5,7,11,.94); padding:40px; cursor:zoom-out;
  animation:panelin .25s var(--ease);
}
.lightbox img{ max-width:100%; max-height:100%; border-radius:10px; background:#fff; padding:14px; }
.lb-close{
  position:absolute; top:20px; right:26px; appearance:none; border:0; background:transparent;
  color:var(--muted); font-size:2.2rem; line-height:1; cursor:pointer; transition:color .2s;
}
.lb-close:hover{ color:#fff; }

/* ═════════════════════════════ RESPONSIVE ═══════════════════════════════ */
@media (max-width: 1080px){
  .step-body{ grid-template-columns:1fr; }
  .step-viz{ position:static; }
  .stats{ grid-template-columns:repeat(2,1fr); }
}
@media (max-width: 860px){
  .nav-links{ display:none; }
  .section{ padding:82px 0; }
  .hero{ padding-top:112px; }
  .step-nav{ grid-template-columns:1fr; }
  .step-btn{ padding:14px 18px; }
  .why-lang{ grid-template-columns:1fr; }
  .step-body{ padding:24px 18px; }
  .foot-grid{ flex-direction:column; }
  .foot-meta{ text-align:left; }
  .abstract{ padding:24px 22px 26px; }
  .pull{ padding:26px 22px; }
}
@media (max-width: 560px){
  .stats{ grid-template-columns:1fr; }
  .hero-title .wordmark{ font-size:clamp(3.2rem,17vw,5rem); }
  .align-row{ grid-template-columns:1fr; gap:8px; }
  .align-mid{ flex-direction:row; gap:8px; }
  .align-arrow{ transform:rotate(90deg); }
  .align-build{ align-items:stretch; }
  .align-build .align-mid{ padding-bottom:0; }
  .lightbox{ padding:14px; }
}

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{ animation-duration:.001ms !important; animation-iteration-count:1 !important;
    transition-duration:.001ms !important; }
  .reveal{ opacity:1; transform:none; }
}