:root {
  --bg:#fff; --text:#172033; --muted:#667085; --line:#d9e0eb;
  --soft:#f4f7fb; --accent:#3157d5; --shadow:0 14px 40px rgba(24,39,75,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--text);background:var(--bg);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;line-height:1.65}
a{color:var(--accent);text-decoration:none} a:hover{text-decoration:underline}
.container{width:min(1120px,calc(100% - 36px));margin:0 auto}
.container.narrow{width:min(900px,calc(100% - 36px))}
.section{padding:40px 0}.section.compact{padding:12px 0}.section.tinted{background:var(--soft)}
.hero{padding-top:80px;padding-bottom:30px;text-align:center;background:radial-gradient(circle at 20% 0%,rgba(49,87,213,.10),transparent 34%),radial-gradient(circle at 85% 15%,rgba(55,178,170,.10),transparent 30%)}
h1{max-width:1040px;margin:0 auto 10px;font-size:clamp(2rem,4vw,2.9rem);line-height:1.12;letter-spacing:-.035em}
.title-line{display:block;white-space:nowrap}
h2{margin:0 0 24px;text-align:center;font-size:clamp(1.8rem,3vw,2.55rem);letter-spacing:-.025em}
h3{margin-top:0;line-height:1.3}
.venue{margin:0 0 20px;color:var(--accent);font-size:1.25rem;font-weight:700}
.authors,.affiliations,.buttons{display:flex;flex-wrap:wrap;justify-content:center;gap:10px 22px}
.authors{font-size:1.08rem}.affiliations{margin-top:8px;color:var(--muted)}.affiliations span{display:inline-flex;align-items:flex-start;gap:6px}
.affiliations sup{font-size:.8rem;vertical-align:super}
.affiliation-row{display:inline-flex;align-items:center;gap:9px}
.affiliations.stacked{display:flex;flex-direction:column;align-items:center;gap:6px}
.affiliation-logo{height:52px;width:auto;border-radius:6px;flex:none}
.venue.affiliations{display:block;color:var(--muted);font-size:1rem;font-weight:400}
.buttons{margin-top:28px}
.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;width:122px;min-height:44px;padding:10px 18px;border:1px solid var(--line);border-radius:999px;color:var(--text);background:rgba(255,255,255,.88);font-weight:650;box-shadow:0 5px 16px rgba(24,39,75,.05)}
.button-icon{display:block;width:18px;height:18px}
.button:hover{text-decoration:none;transform:translateY(-1px)}.button.primary{color:#fff;background:var(--accent);border-color:var(--accent)}
.main-figure{display:block;width:100%;max-height:680px;object-fit:contain;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:var(--shadow)}
.gif-grid{display:flex;flex-wrap:wrap;justify-content:center;gap:18px}
.gif-grid .main-figure{width:calc(50% - 9px);max-height:360px}
.caption{max-width:940px;margin:16px auto 0;color:var(--muted);text-align:center}
.lead{margin:0 auto 32px;max-width:830px;text-align:center;font-size:1.25rem}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{padding:24px;border:1px solid var(--line);border-radius:16px;background:#fff;box-shadow:0 8px 24px rgba(24,39,75,.045)}
.card p{margin-bottom:0;color:var(--muted)}.justified{text-align:justify}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:18px}
.steps>div{padding:15px 17px;border-radius:12px;background:#fff;border:1px solid var(--line)}
.result-tabs{display:flex;justify-content:center;gap:9px;margin-bottom:18px}
.tab{padding:9px 16px;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--text);cursor:pointer;font-weight:650}
.tab.active{color:#fff;border-color:var(--accent);background:var(--accent)}
.result-panel{display:none}.result-panel.active{display:block}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:14px;background:#fff}
table{width:100%;border-collapse:collapse;font-variant-numeric:tabular-nums}
th,td{padding:15px 18px;border-bottom:1px solid var(--line);text-align:center;white-space:nowrap}
th:first-child,td:first-child{text-align:left}tbody tr:last-child td{border-bottom:0}thead{background:#f8faff}
.code-box{position:relative;overflow-x:auto;border-radius:14px;color:#edf2ff;background:#111827}
pre{margin:0;padding:25px;font-size:.92rem;line-height:1.55}
.copy-button{position:absolute;top:12px;right:12px;padding:7px 12px;border:1px solid rgba(255,255,255,.2);border-radius:8px;color:#fff;background:rgba(255,255,255,.1);cursor:pointer}
footer{padding:30px 0;color:var(--muted);text-align:center;border-top:1px solid var(--line)}

/* ---------- shared building blocks ---------- */
.eyebrow{display:block;margin:0 auto 10px;color:var(--accent);text-align:center;font-size:.8rem;font-weight:750;letter-spacing:.14em;text-transform:uppercase}
.subhead{margin:0 auto 26px;max-width:820px;color:var(--muted);text-align:center;font-size:1.06rem}
h3.left{text-align:left}
.figure{margin:0}
.figure+.figure{margin-top:26px}
.figure .caption{margin-top:14px}
.caption b{color:var(--text)}
.pill-row{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin:0 0 26px}
.pill{padding:6px 14px;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--muted);font-size:.9rem;font-weight:600}
.pill b{color:var(--text);font-variant-numeric:tabular-nums}

/* ---------- IVOE spotlight ---------- */
.spotlight{background:linear-gradient(180deg,#f7f9fe 0%,#eef3fd 100%);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.ivoe-logo{display:block;width:min(1230px,100%);margin:0 auto 24px;border-radius:16px;box-shadow:0 16px 44px rgba(11,15,24,.30)}
.hook{max-width:760px;margin:0 auto 30px;padding:18px 24px;border-left:3px solid var(--accent);background:rgba(255,255,255,.72);border-radius:0 12px 12px 0;color:var(--text);font-size:1.16rem}
.hook em{color:var(--accent);font-style:normal;font-weight:700}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:0 0 30px}
.stat{padding:18px 16px;border:1px solid var(--line);border-radius:14px;background:#fff;text-align:center;box-shadow:0 8px 24px rgba(24,39,75,.05)}
.stat .num{display:block;color:var(--accent);font-size:clamp(1.6rem,2.6vw,2.1rem);font-weight:750;line-height:1.15;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.stat .lbl{display:block;margin-top:4px;color:var(--muted);font-size:.9rem;line-height:1.35}
.card .kicker{display:block;margin-bottom:8px;color:var(--accent);font-size:.78rem;font-weight:750;letter-spacing:.1em;text-transform:uppercase}
.two-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}

/* ---------- three-across sequence loops ---------- */
.loop-row{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:0}
.loop{margin:0}
.loop img{display:block;width:100%;border:1px solid var(--line);border-radius:14px;background:#0b0f18;box-shadow:var(--shadow)}
.loop figcaption{margin-top:10px;color:var(--muted);text-align:center;font-size:.9rem;line-height:1.45}

/* ---------- misc ---------- */
td.num,th.num{font-variant-numeric:tabular-nums}
tbody tr.best td{background:#f2f6ff;font-weight:700}
.table-note{margin:12px auto 0;color:var(--muted);text-align:center;font-size:.9rem}

@media(max-width:960px){.stat-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:800px){.section{padding:52px 0}.feature-grid,.steps,.two-cards,.loop-row{grid-template-columns:1fr}h1{letter-spacing:-.03em}.title-line{display:inline;white-space:normal}.title-line+.title-line::before{content:" "}.gif-grid .main-figure{width:100%}.ivoe-logo{width:86%}}