/* OSExpert GitHub Pages site (single-page) */
:root{
  --bg:#ffffff;
  --ink:#111827;
  --muted:#4b5563;
  --line:#e5e7eb;
  --alt:#f8fafc;
  --brand:#111827;
  --brand2:#2563eb;
  --radius:14px;
  --shadow:0 10px 25px rgba(0,0,0,.08);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  color:var(--ink);
  background:var(--bg);
  line-height:1.6;
}
.container{max-width:1100px;margin:0 auto;padding:0 32px}
.header{
  border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,#ffffff 0%,#ffffff 55%,#f7fbff 100%);
}
.toprow{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:16px;padding:18px 0 10px;flex-wrap:wrap;
}
.brand__name{font-weight:900;font-size:20px;letter-spacing:-.02em}
.brand__tag{color:var(--muted);font-size:13px;margin-top:2px}
.nav{display:flex;gap:12px;flex-wrap:wrap}
.nav a{
  color:var(--muted);
  text-decoration:none;
  font-weight:700;
  font-size:13px;
  padding:6px 9px;
  border-radius:10px;
}
.nav a:hover{background:#eef2ff;color:var(--ink)}
.hero{padding:14px 0 24px}
.hero__title{
  margin:8px 0 10px;
  font-size:50px;
  line-height:1.15;
  letter-spacing:-.03em;
  text-align:center;
  font-weight:700;
  background: linear-gradient(90deg, #ff6b6b, #4ecdc4, #45b7d1, #f9ca24, #f0932b, #eb4d4b, #6c5ce7);
  background-size: 300% 300%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientShift 3s ease infinite, bounce 2s ease infinite;
}
@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}
@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}
.hero__authors{color:var(--muted);font-weight:600}
.hero__buttons{display:flex;gap:10px;flex-wrap:wrap;margin:16px 0 8px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:10px 12px;
  border:1px solid var(--line);
  border-radius:12px;
  text-decoration:none;
  color:var(--ink);
  background:#fff;
  font-weight:800;
  font-size:13px;
}
.btn:hover{transform:translateY(-1px);box-shadow:var(--shadow)}
.btn--primary{
  background:var(--brand);
  color:#fff;
  border-color:var(--brand);
}
.note{color:var(--muted);font-size:12.5px;margin-top:6px}
.note code{background:#f1f5f9;border:1px solid var(--line);padding:1px 6px;border-radius:8px}

.section{padding:36px 0}
.section--alt{background:var(--alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
h2{margin:0 0 12px;font-size:22px;letter-spacing:-.01em}
h3{margin:0 0 10px;font-size:15px}
.lead{color:var(--muted);max-width:920px}
.abstract-full{color:var(--muted);max-width:100%;line-height:1.7}
.motivation-box{
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:18px 20px;
  margin:16px 0;
  position:relative;
  box-shadow:var(--shadow);
  overflow:hidden;
}
.motivation-box::before{
  content:"";
  position:absolute;
  left:0;
  top:0;
  bottom:0;
  width:6px;
}
.motivation-box-red{background:linear-gradient(135deg,#fff1f2 0%,#fee2e2 100%)}
.motivation-box-red::before{background:#ef4444}
.motivation-box-yellow{background:linear-gradient(135deg,#fffbeb 0%,#fef3c7 100%)}
.motivation-box-yellow::before{background:#f59e0b}
.motivation-box-blue{background:linear-gradient(135deg,#eff6ff 0%,#dbeafe 100%)}
.motivation-box-blue::before{background:#3b82f6}
.motivation-kicker{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin:0 0 12px;
  padding:8px 16px;
  border-radius:999px;
  font-size:18px;
  font-weight:900;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--ink);
  background:rgba(255,255,255,.82);
  border:1px solid rgba(17,24,39,.1);
  box-shadow:0 8px 20px rgba(15,23,42,.08);
  line-height:1;
}
.motivation-kicker::before{
  content:"";
  width:12px;
  height:12px;
  border-radius:999px;
  background:currentColor;
  opacity:.7;
}
.motivation-box h3{margin:0 0 10px;font-size:22px;line-height:1.2;font-weight:900;color:var(--ink);letter-spacing:-.02em}
.motivation-box p{margin:8px 0;color:var(--muted);line-height:1.6}
.motivation-box ul{margin:8px 0 0 20px;color:#374151;line-height:1.8}
.motivation-box li{margin:8px 0}

.grid2{display:grid;grid-template-columns:1.1fr .9fr;gap:16px;align-items:start}
.card,.mini-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:14px 14px;
  box-shadow:0 1px 0 rgba(0,0,0,.02);
}
.card ul{margin:8px 0 0 18px;color:var(--muted)}
.card li{margin:6px 0}
.mini-title{font-weight:900;margin-bottom:8px}
.mini-metrics{display:grid;gap:10px}
.metric{display:flex;gap:10px;align-items:baseline}
.metric__k{font-weight:950;font-size:22px;color:var(--brand2)}
.metric__v{color:var(--muted);font-weight:700}

.figure{margin:14px 0 0}
.img{
  width:100%;
  border-radius:var(--radius);
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  background:#fff;
}
figcaption{color:var(--muted);font-size:12.5px;margin-top:8px}

.gallery{display:grid;gap:14px;margin-top:12px}
.benchmark-images{display:grid;grid-template-columns:0.7fr 0.3fr;gap:20px;margin-top:14px;align-items:stretch}
.benchmark-left,.benchmark-right{display:flex;flex-direction:column}
.benchmark-left .figure,.benchmark-right .figure{display:flex;flex-direction:column;height:100%}
.benchmark-left .img,.benchmark-right .img{height:100%;width:100%;object-fit:contain;object-position:center}
.img-small{max-width:100%;width:100%}
.img-table{max-width:100%;width:100%}
.img-example{height:450px;width:100%;object-fit:contain;object-position:center}
.example-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:14px;align-items:start}
.example-grid .figure{display:flex;flex-direction:column;height:100%}
.example-grid .figure img{display:block;width:100%}
.res-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:12px}
.res{
  display:block;text-decoration:none;color:var(--ink);
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:14px;
  box-shadow:0 1px 0 rgba(0,0,0,.02);
}
.res:hover{transform:translateY(-1px);box-shadow:var(--shadow)}
.res__t{font-weight:950}
.res__d{color:var(--muted);font-size:13px;margin-top:4px}

.bib{
  position:relative;
  border-radius:var(--radius);
  border:1px solid #0b1220;
  background:#0b1220;
  overflow:hidden;
  margin-top:10px;
}
.bib pre{
  margin:0;padding:16px;color:#e5e7eb;overflow-x:auto;font-size:12.5px;line-height:1.5
}
.copy{
  position:absolute;top:10px;right:10px;
  border:1px solid rgba(255,255,255,.2);
  background:rgba(255,255,255,.12);
  color:#fff;
  border-radius:10px;
  padding:7px 10px;
  font-weight:900;
  cursor:pointer;
}
.copy:hover{background:rgba(255,255,255,.18)}

.footer{padding:22px 0;border-top:1px solid var(--line)}
.footer__inner{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;color:var(--muted);font-size:13px}
.footer__links a{color:var(--muted);text-decoration:none;margin-left:10px}
.footer__links a:hover{color:var(--ink)}

@media (max-width: 900px){
  .grid2{grid-template-columns:1fr}
  .hero__title{font-size:36px;text-align:center}
  .res-grid{grid-template-columns:1fr}
  .benchmark-images{grid-template-columns:1fr}
  .example-grid{grid-template-columns:1fr}
}