/* Simple, clean styling inspired by academic project pages */
:root{
  --bg:#ffffff;
  --text:#0f172a;
  --muted:#475569;
  --border:#e2e8f0;
  --soft:#f8fafc;
  --brand:#0b4a6e;
  --badge:#0b4a6e;
  --link:#0b4a6e;
  --callout:#e7f4ff;
  --shadow: 0 10px 30px rgba(2,6,23,.08);
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  color:var(--text);
  background:var(--bg);
  line-height:1.6;
}

.hero{
  background: linear-gradient(180deg, #ffffff 0%, #f6f7f9 100%);
  border-bottom:1px solid var(--border);
}

.logo-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:16px 24px;
  max-width:1100px;
  margin:0 auto;
}

.logo{
  height:56px;
  width:auto;
  object-fit:contain;
}

.hero-inner{
  max-width:1100px;
  margin:0 auto;
  padding:24px 24px 28px;
  text-align:center;
}

.badge{
  display:inline-block;
  padding:8px 14px;
  border-radius:999px;
  background:var(--badge);
  color:white;
  font-weight:700;
  letter-spacing:.3px;
  font-size:14px;
  margin-bottom:14px;
}

.title{
  margin:0 0 10px;
  font-size:44px;
  line-height:1.15;
  letter-spacing:-.02em;
}

.authors{
  font-size:18px;
  color:var(--link);
  font-weight:650;
  margin-bottom:6px;
}

.affil{
  font-size:16px;
  color:var(--muted);
}

.nav{
  margin-top:18px;
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  justify-content:center;
}

.nav a{
  text-decoration:none;
  color:var(--link);
  border:1px solid var(--border);
  background:white;
  padding:8px 12px;
  border-radius:999px;
  font-weight:600;
  font-size:14px;
}

.nav a:hover{ box-shadow: var(--shadow); }

.container{
  max-width:1100px;
  margin:0 auto;
  padding:28px 24px 60px;
}

.section{
  margin:34px 0;
}

.section h2{
  font-size:30px;
  margin:0 0 12px;
}

.lead{
  font-size:17px;
  color:var(--text);
  margin:0 0 18px;
}

.callout{
  background:var(--callout);
  border:1px solid #cbe6ff;
  border-radius:16px;
  padding:18px 18px;
}

.callout h3{
  margin:0 0 10px;
  font-size:20px;
}

.checklist{
  margin:0;
  padding-left:22px;
}

.checklist li{
  margin:10px 0;
}

.checklist li::marker{
  content:"✓  ";
  color:#16a34a;
  font-weight:800;
}

.figure{
  margin:18px 0 26px;
  padding:14px;
  background:var(--soft);
  border:1px solid var(--border);
  border-radius:18px;
}

.figure img{
  width:100%;
  height:auto;
  display:block;
  border-radius:12px;
}

.figure figcaption{
  margin-top:10px;
  color:var(--muted);
  font-size:14px;
}

.bullets{
  padding-left:22px;
  margin:0;
}

.bullets li{
  margin:10px 0;
}

.button-row{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  text-decoration:none;
  color:white;
  background:var(--brand);
  padding:12px 16px;
  border-radius:14px;
  font-weight:700;
  box-shadow: var(--shadow);
}

.btn:hover{ filter:brightness(1.02); }

.muted{
  color:var(--muted);
  margin-top:12px;
}

.code{
  background:#0b1220;
  color:#e2e8f0;
  padding:16px;
  border-radius:14px;
  overflow:auto;
  border:1px solid rgba(226,232,240,.15);
}

.footer{
  margin-top:40px;
  padding-top:18px;
  border-top:1px solid var(--border);
  text-align:center;
  color:var(--muted);
}

.footer a{ color:var(--link); text-decoration:none; font-weight:650; }

@media (max-width: 700px){
  .title{ font-size:34px; }
  .logo{ height:44px; }
}


/* --- Method cards (SRA-Seg style) --- */
.method-grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: 18px;
}
.method-card{
  background:#f7f8fb;
  border-radius:18px;
  padding:22px 22px 18px 22px;
  border-left: 6px solid #0b3b56;
  box-shadow: 0 6px 18px rgba(16,24,40,0.06);
}
.method-card-title{
  display:flex;
  align-items:center;
  gap:10px;
  font-weight:700;
  font-size: 1.15rem;
  color:#0b3b56;
  margin-bottom: 10px;
}
.method-icon{
  font-size: 1.15rem;
  line-height:1;
  display:inline-flex;
  width: 1.4rem;
  justify-content:center;
}
.method-card p{
  margin:0;
  color:#4b5563;
  line-height:1.55;
  font-size: 1rem;
}
@media (max-width: 980px){
  .method-grid{ grid-template-columns: 1fr; }
}