/* ══════════════════════════════════════════════════════════════
   Beyond Multimodal Alignment — project page
   The palette is the paper's: one colour, one variable.
   ══════════════════════════════════════════════════════════════ */

:root{
  --ink:#10151C;          --ink-2:#39465A;      --ink-3:#6B7A90;
  --paper:#FBFCFE;        --line:#E3E9F1;       --hair:#EEF2F7;
  --night:#080B11;        --night-2:#0E141D;    --night-line:#1E2836;

  --audio:#3E7BF0;        --accel:#12B39A;      --fused:#A55CD6;
  --pass:#2E9E5B;         --stop:#E05B44;       --amber:#D79A2B;

  --serif:"Instrument Serif",Georgia,serif;
  --sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;

  --wrap:1180px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);
  background:var(--paper);
  color:var(--ink);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
canvas{display:block}
.mono{font-family:var(--mono);font-size:.94em;letter-spacing:-.01em}
.serif-it{font-family:var(--serif);font-style:italic;font-weight:400}
sup{font-size:.62em;vertical-align:super}

/* film grain, very light — keeps large flats from looking plastic */
.grain{
  position:fixed;inset:0;z-index:9999;pointer-events:none;opacity:.035;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/></filter><rect width='160' height='160' filter='url(%23n)'/></svg>");
}

/* ────────────────────────── hero ────────────────────────── */
.hero{
  position:relative;min-height:100svh;
  background:radial-gradient(120% 100% at 72% 18%,#1A2534 0%,var(--night) 66%);
  color:#EEF3FA;overflow:hidden;
  display:flex;flex-direction:column;
}
#scan-stage{position:absolute;inset:0;width:100%;height:100%}
.hero-veil{
  position:absolute;inset:0;pointer-events:none;
  background:
    linear-gradient(100deg,rgba(8,11,17,.94) 0%,rgba(8,11,17,.86) 34%,rgba(8,11,17,.28) 62%,rgba(8,11,17,.05) 100%),
    linear-gradient(180deg,rgba(8,11,17,.45) 0%,rgba(8,11,17,0) 24%,rgba(8,11,17,.72) 100%);
}

.topbar{
  position:relative;z-index:3;
  display:flex;align-items:center;justify-content:space-between;
  padding:26px clamp(22px,5vw,64px);
}
.wordmark{
  font-family:var(--mono);font-size:13px;letter-spacing:.24em;font-weight:500;
  color:#96A9C4;
}
.topbar-links{display:flex;gap:30px;font-size:13.5px;color:#9FB0C8}
.topbar-links a{transition:color .25s var(--ease)}
.topbar-links a:hover{color:#fff}
@media(max-width:760px){.topbar-links{display:none}}

.hero-body{
  position:relative;z-index:3;
  margin:auto;padding:0 clamp(22px,5vw,64px) 90px;
  max-width:var(--wrap);width:100%;
}
.eyebrow{
  font-family:var(--mono);font-size:11.5px;letter-spacing:.2em;text-transform:uppercase;
  color:#7E93B2;margin-bottom:22px;
}
h1{
  font-size:clamp(42px,7.4vw,92px);line-height:1.02;font-weight:600;letter-spacing:-.035em;
  margin-bottom:26px;
}
h1 .serif-it{font-weight:400;letter-spacing:-.01em;color:#CFE0F7}
.hero-sub{
  font-size:clamp(15.5px,1.65vw,19px);line-height:1.6;color:#A7B8CF;max-width:44ch;
  margin-bottom:34px;
}

.authors{
  list-style:none;display:flex;flex-wrap:wrap;gap:4px 18px;
  font-size:14px;color:#C6D4E7;margin-bottom:8px;
}
.authors b{font-weight:600;color:#fff}
.affil{font-size:12.5px;color:#7E93B2;margin-bottom:34px}

.cta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:52px}
.btn{
  display:inline-flex;align-items:center;height:42px;padding:0 22px;border-radius:999px;
  font-size:14px;font-weight:500;letter-spacing:.01em;
  border:1px solid rgba(255,255,255,.18);color:#DCE7F6;
  transition:all .3s var(--ease);backdrop-filter:blur(8px);
}
.btn:hover{border-color:rgba(255,255,255,.5);background:rgba(255,255,255,.07);transform:translateY(-1px)}
.btn.primary{background:#EEF3FA;color:#0C1119;border-color:#EEF3FA}
.btn.primary:hover{background:#fff;transform:translateY(-1px)}

.hero-stats{display:flex;flex-wrap:wrap;gap:14px 54px}
.hero-stats div{display:flex;flex-direction:column;gap:4px}
.hero-stats b{
  font-family:var(--mono);font-size:26px;font-weight:500;color:#fff;letter-spacing:-.02em;
}
.hero-stats .slash{color:#5D708C;padding:0 1px}
.hero-stats span{font-size:12.5px;color:#8298B5;letter-spacing:.01em}

.scroll-cue{
  position:absolute;left:50%;bottom:26px;transform:translateX(-50%);z-index:3;
  width:22px;height:34px;border:1px solid rgba(255,255,255,.24);border-radius:12px;
}
.scroll-cue span{
  position:absolute;left:50%;top:8px;width:3px;height:6px;border-radius:2px;
  background:rgba(255,255,255,.7);transform:translateX(-50%);
  animation:cue 1.9s var(--ease) infinite;
}
@keyframes cue{0%{opacity:0;transform:translate(-50%,0)}30%{opacity:1}100%{opacity:0;transform:translate(-50%,13px)}}

/* ────────────────────────── bands ────────────────────────── */
.band{padding:clamp(72px,10vw,132px) 0;position:relative}
.band.dark{background:var(--night-2);color:#E7EEF8}
.band.dark .lede{color:#9FB2CC}
.band.dark .band-title{color:#F2F6FC}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 clamp(22px,5vw,64px)}
.wrap.narrow{max-width:820px}

.kicker{
  font-family:var(--mono);font-size:11.5px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--ink-3);margin-bottom:18px;
}
.band.dark .kicker{color:#7B90AE}
.band-title{
  font-size:clamp(30px,4.4vw,54px);line-height:1.08;font-weight:600;letter-spacing:-.03em;
  margin-bottom:22px;
}
.band-title .serif-it{font-weight:400;color:var(--ink-2)}
.band.dark .band-title .serif-it{color:#A9C2E4}
.lede{font-size:16.5px;line-height:1.68;color:var(--ink-2);max-width:66ch;margin-bottom:44px}
.lede b{font-weight:600;color:var(--ink)}
.band.dark .lede b{color:#fff}

/* ────────────────────────── ladder ────────────────────────── */
.ladder{list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
@media(max-width:900px){.ladder{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.ladder{grid-template-columns:1fr}}
.rung{
  position:relative;padding:22px 20px 20px;border-radius:14px;
  border:1px solid var(--line);background:#fff;
  opacity:0;transform:translateY(18px);
  transition:opacity .7s var(--ease),transform .7s var(--ease),border-color .3s;
  transition-delay:calc(var(--i) * 90ms);
}
.rung.in{opacity:1;transform:none}
.rung::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:2px;background:var(--ink-3);
}
.rung.pass::before{background:var(--pass)}
.rung.part::before{background:var(--amber)}
.rung h3{font-size:16px;font-weight:600;letter-spacing:-.015em;margin:0 0 8px}
.rung p{font-size:13.5px;line-height:1.55;color:var(--ink-3);margin-bottom:16px}
.rung .verdict{
  font-family:var(--mono);font-size:11.5px;letter-spacing:.01em;color:var(--ink-3);
}
.rung.pass .verdict{color:var(--pass)}
.rung.part .verdict{color:var(--amber)}
.rung-mark{
  position:absolute;right:18px;top:18px;width:16px;height:16px;border-radius:50%;
  border:1.6px solid var(--ink-3);
}
.rung.pass .rung-mark{border-color:var(--pass);background:
  radial-gradient(circle at 50% 50%,var(--pass) 0 34%,transparent 35%)}
.rung.part .rung-mark{border-color:var(--amber);background:
  radial-gradient(circle at 50% 50%,var(--amber) 0 34%,transparent 35%)}

/* ────────────────────────── panels ────────────────────────── */
.panel{
  border:1px solid var(--line);border-radius:16px;background:#fff;
  padding:20px 22px 22px;box-shadow:0 1px 2px rgba(16,21,28,.03),0 12px 34px rgba(16,21,28,.045);
}
.panel.dark-panel{background:#0B1119;border-color:var(--night-line);box-shadow:none}
.panel-head{
  display:flex;align-items:baseline;justify-content:space-between;gap:16px;
  padding-bottom:14px;margin-bottom:16px;border-bottom:1px solid var(--hair);
}
.dark-panel .panel-head{border-bottom-color:var(--night-line)}
.panel-title{font-family:var(--serif);font-style:italic;font-size:19px;letter-spacing:.005em}
.panel-note{font-size:12px;color:var(--ink-3);font-family:var(--mono)}
.dark-panel .panel-note{color:#6F86A6}
.panel canvas{width:100%;height:auto}
.cap{font-size:12.5px;line-height:1.5;color:var(--ink-3);margin-top:14px}

.surface-strip{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:18px}
.chip{
  font-family:var(--mono);font-size:11.5px;padding:5px 10px;border-radius:7px;
  border:1px solid var(--line);color:var(--ink-3);cursor:pointer;background:#fff;
  transition:all .22s var(--ease);
}
.chip:hover{border-color:var(--ink-3);color:var(--ink)}
.chip.on{background:var(--ink);border-color:var(--ink);color:#fff}

.legend{display:flex;flex-wrap:wrap;align-items:center;gap:8px 22px;margin-top:16px;font-size:13px}
.lg{display:inline-flex;align-items:center;gap:8px;color:var(--ink-2)}
.dark-panel + .legend .lg,.band.dark .lg{color:#A9BCD6}
.lg i{width:16px;height:3px;border-radius:2px;background:currentColor}
.lg.audio{color:var(--audio)}.lg.accel{color:var(--accel)}
.lg.truth{color:var(--ink-3)}.lg.truth i{background:repeating-linear-gradient(90deg,currentColor 0 4px,transparent 4px 8px)}
.lg.ab{color:#E9F0FA}.lg.ba{color:var(--stop)}
.lg.ba i{background:repeating-linear-gradient(90deg,currentColor 0 5px,transparent 5px 10px)}
.toggle{display:inline-flex;align-items:center;gap:8px;cursor:pointer;color:var(--ink-3);font-size:12.5px}
.toggle input{accent-color:var(--stop)}

.readout{
  margin-top:16px;padding-top:14px;border-top:1px solid var(--hair);
  font-family:var(--mono);font-size:12.5px;color:var(--ink-2);line-height:1.7;
}
.readout b{color:var(--ink)}
.readout .good{color:var(--pass)}
.readout .bad{color:var(--stop)}

.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:22px}
@media(max-width:820px){.stat-row{grid-template-columns:1fr 1fr}}
.stat{
  padding:16px 18px;border-radius:12px;border:1px solid var(--line);background:#fff;
  display:flex;flex-direction:column;gap:5px;
}
.stat b{font-family:var(--mono);font-size:21px;font-weight:500;letter-spacing:-.02em}
.stat span{font-size:12px;color:var(--ink-3)}
.stat.accent{border-color:rgba(46,158,91,.35);background:rgba(46,158,91,.05)}
.stat.accent b{color:var(--pass)}

/* ────────────────────────── rig ────────────────────────── */
.rig{position:relative;border-radius:16px;overflow:hidden;border:1px solid var(--night-line);background:#0B1119}
#rig-stage{width:100%;height:clamp(300px,42vw,430px)}
.rig-hud{
  position:absolute;left:18px;top:18px;padding:14px 16px;border-radius:12px;
  background:rgba(8,12,19,.72);border:1px solid rgba(255,255,255,.09);backdrop-filter:blur(10px);
  font-family:var(--mono);font-size:12px;min-width:184px;
}
.rig-tags{position:absolute;inset:0;pointer-events:none}
.rig-tag{
  position:absolute;left:0;top:0;white-space:nowrap;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.05em;color:#93AACA;
  background:rgba(8,12,19,.7);border:1px solid rgba(255,255,255,.1);
  border-radius:7px;padding:3px 9px;backdrop-filter:blur(6px);
  opacity:0;transition:opacity .6s var(--ease);
}
.rig-tag.on{opacity:1}
.rig-tag em{font-family:var(--serif);font-style:italic;font-size:14px;color:#E7EEF8;margin-right:6px;letter-spacing:0}
.rig-tag em sub{font-size:.66em;vertical-align:-.12em;margin-left:.5px}
.rig-tag::after{
  content:'';position:absolute;left:calc(50% + var(--dx,0px));top:100%;
  width:1px;height:var(--tick,12px);
  background:linear-gradient(rgba(255,255,255,.42),rgba(255,255,255,.1));
}
.rig-tag.below::after{top:auto;bottom:100%;background:linear-gradient(rgba(255,255,255,.1),rgba(255,255,255,.42))}
@media(max-width:720px){.rig-tag{display:none}}

.hud-row{display:flex;justify-content:space-between;gap:20px;padding:3px 0;color:#7F95B4}
.hud-row b{color:#E7EEF8;font-weight:500}
.hud-row.yield b{color:var(--accel)}
.hud-row.yield.on b{color:var(--stop)}

.controls{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 30px}
.run{
  font-family:var(--sans);font-size:14px;font-weight:500;color:#0C1119;background:#E9F0FA;
  border:1px solid #E9F0FA;border-radius:999px;height:42px;padding:0 22px;cursor:pointer;
  transition:all .26s var(--ease);
}
.run:hover{transform:translateY(-1px);background:#fff}
.run.ghost{background:transparent;color:#B9CBE3;border-color:rgba(255,255,255,.2)}
.run.ghost:hover{background:rgba(255,255,255,.07);color:#fff}
.run:disabled{opacity:.45;cursor:default;transform:none}
.commutator{font-family:var(--mono);font-size:12.5px;color:#8AA0BE;margin-left:auto}
.commutator b{color:var(--stop)}

/* ────────────────────────── gate grid ────────────────────────── */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media(max-width:980px){.grid-3{grid-template-columns:1fr}}

/* ────────────────────────── paper ────────────────────────── */
.paper-band{background:linear-gradient(180deg,#fff 0%,var(--paper) 100%);border-top:1px solid var(--line)}
.paper-band .btn{border-color:var(--line);color:var(--ink-2)}
.paper-band .btn:hover{border-color:var(--ink);color:var(--ink);background:#fff}
.paper-band .btn.primary{background:var(--ink);color:#fff;border-color:var(--ink)}
.paper-band .btn.primary:hover{background:#000}
.bibtex{margin-top:14px;border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff}
.bib-head{
  display:flex;justify-content:space-between;align-items:center;padding:11px 16px;
  border-bottom:1px solid var(--hair);font-family:var(--mono);font-size:11.5px;
  letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);
}
.bib-head button{
  font-family:var(--sans);font-size:12px;letter-spacing:0;text-transform:none;
  border:1px solid var(--line);background:#fff;border-radius:7px;padding:4px 12px;cursor:pointer;
  color:var(--ink-2);transition:all .22s var(--ease);
}
.bib-head button:hover{border-color:var(--ink);color:var(--ink)}
.bibtex pre{
  padding:16px;font-family:var(--mono);font-size:12px;line-height:1.72;color:var(--ink-2);
  overflow-x:auto;
}
.site-foot{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:12.5px;color:var(--ink-3);
}

/* ────────────────────────── reveal ────────────────────────── */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.in{opacity:1;transform:none}

@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:.01ms!important}
  .reveal,.rung{opacity:1;transform:none}
}