:root{
  --ink:#2b2b2b;--muted:#6b6f75;--line:#e4e6ea;--alt:#f6f7f9;
  --green:#1c6b3a;--green-soft:#e6f2ea;--yellow:#e5b84a;--red:#c0392b;--blue:#3273dc;
  --radius:12px;--shadow:0 4px 14px rgba(0,0,0,.08);
  --mono:"JetBrains Mono","SFMono-Regular",Consolas,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Noto Sans","Google Sans",system-ui,-apple-system,sans-serif;color:var(--ink);background:#fff;line-height:1.65;font-size:16.5px}
a{color:var(--blue)}
.container{max-width:1120px;margin:0 auto;padding:0 1.5rem}
.narrow{max-width:900px;margin:0 auto}
.section{padding:3.5rem 0}
.section-alt{background:var(--alt)}
h2.title{font-size:2rem;font-weight:700;text-align:center;margin:0 0 1.5rem;letter-spacing:-.01em}
h3.sub{font-size:1.25rem;font-weight:700;margin:2.5rem 0 1rem;text-align:center}
p.intro{max-width:860px;margin:0 auto 1.5rem;text-align:center;color:var(--muted)}
p.body{text-align:justify;margin:0 0 1rem}

/* hero */
.hero{padding:3.5rem 0 1rem;text-align:center}
.hero h1{font-size:2.5rem;line-height:1.2;font-weight:700;margin:0 auto .6rem;max-width:960px;letter-spacing:-.01em}
.hero h1 .m{color:var(--green)}
.hero .tag{font-family:"Castoro",Georgia,serif;font-style:italic;color:#8a8f96;font-size:1.15rem;margin:.2rem 0 1.8rem;letter-spacing:.01em}
.hero .tag b{font-style:normal;font-family:"Noto Sans",sans-serif;color:#4f8a63;font-weight:600}
.authors{font-size:1.25rem;margin:0 auto .8rem;line-height:1.8}
.authors a{color:var(--blue);text-decoration:none}.authors a:hover{text-decoration:underline}
.authors sup{font-size:.7em}
.affil{color:var(--muted);font-size:.92rem;margin:0 0 1.6rem;line-height:1.9}
.affil .note{font-size:.85rem}
.venue{font-weight:600;margin:.6rem 0 1.4rem}
.links{display:flex;justify-content:center;flex-wrap:wrap;gap:.7rem;margin-top:.4rem}
.btn{display:inline-flex;align-items:center;gap:.5rem;background:#363636;color:#fff;border-radius:9999px;padding:.55rem 1.2rem;font-size:.95rem;text-decoration:none;transition:background .2s,transform .2s;border:0;font-family:inherit}
.btn:hover{background:#111;transform:translateY(-1px)}
.btn.soon{background:#9a9a9a;cursor:default}.btn.soon:hover{background:#9a9a9a;transform:none}
.btn.soon small{opacity:.85;font-size:.8em}

/* teaser video */
.teaser-wrap{position:relative;max-width:1000px;margin:2rem auto 0}
.teaser-wrap video{width:100%;display:block;border-radius:var(--radius);box-shadow:0 6px 24px rgba(0,0,0,.16);background:#000}
.play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:5.5rem;height:5.5rem;border-radius:50%;background:rgba(0,0,0,.72);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .25s;z-index:2}
.play-btn:hover{background:rgba(0,0,0,.9);transform:translate(-50%,-50%) scale(1.08)}
.play-btn i{color:#fff;font-size:2.2rem;margin-left:.35rem}

/* figures */
figure.fig{margin:0 auto;text-align:center}
figure.fig img{max-width:100%;height:auto;border-radius:6px}
figure.fig.inset img{background:#fff;padding:.8rem;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
figcaption{font-size:.92rem;color:var(--muted);margin:.8rem auto 0;text-align:left;max-width:900px;line-height:1.55}
figcaption b{color:var(--ink)}
.w-900{max-width:900px}.w-1000{max-width:1000px}.w-760{max-width:760px}

/* key numbers */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem;max-width:960px;margin:2rem auto 0}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1rem 1.2rem;text-align:center;box-shadow:var(--shadow)}
.stat .v{font-family:var(--mono);font-size:2.1rem;font-weight:700;color:var(--green);line-height:1.1}
.stat .v.y{color:var(--yellow)}.stat .v.g{color:#8a8f96}
.stat .k{font-size:.85rem;color:var(--muted);margin-top:.35rem;line-height:1.4}

/* pills / legend buttons */
.pills{display:flex;flex-wrap:wrap;justify-content:center;gap:.6rem;margin:1.5rem 0 1rem}
.pill{display:inline-flex;align-items:center;gap:.45rem;font-size:.95rem;font-weight:600;color:#2b2b2b;background:#fff;border:1px solid #d9dde2;border-radius:999px;padding:.45em 1.05em;cursor:pointer;transition:all .2s;font-family:inherit}
.pill i{color:var(--green)}
.pill:hover,.pill.active{background:var(--green);border-color:var(--green);color:#fff;box-shadow:0 3px 10px rgba(28,107,58,.25)}
.pill:hover i,.pill.active i{color:#fff}
.pill .num{font-family:var(--mono);font-size:.85em;opacity:.8}

.step-panel{display:none;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.4rem 1.6rem;box-shadow:var(--shadow);max-width:1000px;margin:0 auto}
.step-panel.active{display:grid;grid-template-columns:1.1fr .9fr;gap:1.6rem;align-items:center}
.step-panel h4{margin:0 0 .5rem;font-size:1.1rem}
.step-panel p{margin:0 0 .6rem;font-size:.97rem}
.step-panel .media video,.step-panel .media img{width:100%;display:block;border-radius:8px;background:#eee}
.step-panel .media .lbl{font-size:.82rem;color:var(--muted);margin-top:.4rem;text-align:center}
.step-panel .mini{display:grid;grid-template-columns:repeat(3,1fr);gap:.4rem}
.step-panel .mini video{aspect-ratio:1/1;object-fit:cover}

/* tabs */
.tabs{display:flex;justify-content:center;flex-wrap:wrap;gap:.25rem;border-bottom:2px solid var(--line);margin:1.5rem auto 1.5rem;max-width:900px}
.tab-btn{background:none;border:0;border-bottom:3px solid transparent;margin-bottom:-2px;padding:.6rem 1.2rem;font:inherit;font-size:1rem;font-weight:600;color:var(--muted);cursor:pointer;transition:all .2s}
.tab-btn:hover{color:var(--ink)}
.tab-btn.active{color:var(--green);border-bottom-color:var(--green)}
.pane{display:none}.pane.active{display:block}

/* video grids */
.vgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:.9rem;max-width:1000px;margin:0 auto}
.vgrid.three{grid-template-columns:repeat(3,1fr)}
.vgrid.two{grid-template-columns:repeat(2,1fr);max-width:820px}
.vcard{background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden;box-shadow:var(--shadow)}
.vcard video{width:100%;display:block;background:#ddd}
.vcard.sq video{aspect-ratio:1/1;image-rendering:auto}
.vcard .cap{font-size:.85rem;padding:.5rem .7rem;color:var(--ink);line-height:1.35;border-top:1px solid var(--line)}
.vcard .cap small{display:block;color:var(--muted)}
.badge{display:inline-block;font-size:.72rem;font-weight:700;padding:.1em .55em;border-radius:999px;color:#fff;background:var(--green);vertical-align:middle;margin-left:.3rem}
.badge.red{background:var(--red)}.badge.grey{background:#8a8f96}

/* toggle */
.toggle{display:inline-flex;border:1px solid #d9dde2;border-radius:999px;overflow:hidden;background:#fff}
.toggle button{border:0;background:none;padding:.4rem 1rem;font:inherit;font-size:.9rem;font-weight:600;color:var(--muted);cursor:pointer}
.toggle button.active{background:var(--green);color:#fff}
.center{text-align:center}

/* tables */
.tablewrap{overflow-x:auto;max-width:1000px;margin:0 auto}
table.res{border-collapse:collapse;margin:0 auto;font-size:.92rem;width:100%;font-variant-numeric:tabular-nums}
table.res th,table.res td{padding:.45rem .6rem;text-align:center;border-bottom:1px solid var(--line);white-space:nowrap}
table.res th{border-bottom:2px solid #9a9a9a;font-weight:600;color:var(--muted);font-size:.85rem}
table.res th.grp{border-bottom:1px solid #bbb;color:var(--ink);font-size:.9rem}
table.res td:first-child,table.res th:first-child{text-align:left}
table.res tr.er td{background:#eef0f2;font-style:italic;color:#555}
table.res tr.ours td{font-weight:700;color:var(--green);background:var(--green-soft)}
table.res tr.sep td{border-top:2px solid #9a9a9a}
table.res small{color:#999;font-weight:400;font-size:.75em;display:block;line-height:1}
.tnote{font-size:.88rem;color:var(--muted);max-width:900px;margin:.8rem auto 0}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:2rem;align-items:start;max-width:1000px;margin:0 auto}
.two-col.v-center{align-items:center}

/* bibtex */
pre.bib{background:#f1f2f4;border:1px solid var(--line);padding:1.2rem;border-radius:var(--radius);overflow:auto;font-family:var(--mono);font-size:.85rem;max-width:900px;margin:0 auto;position:relative}
.copy{position:absolute;top:.6rem;right:.6rem;font:inherit;font-size:.75rem;background:#fff;border:1px solid #ccc;border-radius:6px;padding:.25rem .6rem;cursor:pointer}
footer{color:var(--muted);font-size:.85rem;text-align:center;padding:2rem 1rem;border-top:1px solid var(--line)}

@media(max-width:900px){
  .hero h1{font-size:1.8rem}
  .stats{grid-template-columns:repeat(2,1fr)}
  .step-panel.active{grid-template-columns:1fr}
  .vgrid,.vgrid.three{grid-template-columns:repeat(2,1fr)}
  .two-col{grid-template-columns:1fr}
  .tab-btn{padding:.5rem .8rem;font-size:.9rem}
}
@media(max-width:520px){.vgrid,.vgrid.three,.vgrid.two{grid-template-columns:1fr}.stats{grid-template-columns:1fr}}

.chips{display:grid;grid-template-columns:repeat(2,1fr);gap:.6rem}
.chip{background:var(--alt);border:1px solid var(--line);border-radius:10px;padding:.7rem .6rem;text-align:center}
.chip .v{font-family:var(--mono);font-size:1.5rem;font-weight:700;color:var(--green);line-height:1.1}
.chip .v.y{color:var(--yellow)}.chip .v.g{color:#8a8f96}
.chip .k{font-size:.78rem;color:var(--muted);margin-top:.3rem;line-height:1.3}

.fig-pair{display:grid;grid-template-columns:1.1fr 1fr;gap:1rem;max-width:1060px;margin:0 auto;align-items:stretch}
.fig-pair figure.fig.inset img{padding:.5rem;height:100%;object-fit:contain}
@media(max-width:900px){.fig-pair{grid-template-columns:1fr}}

.flow-labels{display:grid;grid-template-columns:repeat(3,1fr);text-align:center;font-size:.78rem;font-weight:600;line-height:1.2;margin-bottom:.3rem}
.flow-labels small{font-weight:400;color:var(--muted)}

.flow-wrap{max-width:330px;margin:0 auto}
.flow-labels{font-size:.72rem}

.vgrid.five{grid-template-columns:repeat(5,1fr)}
.two-col.real-cols{grid-template-columns:1.35fr 1fr}
@media(max-width:900px){.vgrid.five{grid-template-columns:repeat(3,1fr)}.two-col.real-cols{grid-template-columns:1fr}}
@media(max-width:520px){.vgrid.five{grid-template-columns:repeat(2,1fr)}figure.fig.inset img{padding:.4rem}}