:root{
  --navy:#0b3c5d;
  --navy2:#062a42;
  --gold:#ffb347;
  --accent:#ff8a00;
  --bg:#f5f7fb;
  --text:#0f172a;
  --muted:#475569;
  --card:#ffffff;
  --shadow: 0 14px 40px rgba(2,8,23,.12);
  --radius:18px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family: "Heebo", system-ui, -apple-system, Segoe UI, Arial, sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.75;
}
a{color:var(--navy); text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1100px;margin:0 auto;padding:0 18px}
.topbar{
  position: static; 
  z-index: auto;
  background:rgba(255,255,255,.92);
  backdrop-filter: blur(10px);
  border-bottom:1px solid rgba(2,8,23,.06);
}
.nav{
  display:flex; align-items:center; justify-content:space-between;
  padding:10px 0;
}
.brand{
  display:flex; align-items:center; gap:10px;
}
.brand img{width:46px;height:46px;object-fit:contain}
.brand .t1{font-weight:800; letter-spacing:.3px}
.brand .t2{font-size:.88rem;color:var(--muted)}
.menu{display:flex; gap:14px; flex-wrap:wrap}
.menu a{
  padding:8px 10px; border-radius:12px;
  color:var(--navy2); font-weight:600;
}
.menu a.active, .menu a:hover{
  background:rgba(11,60,93,.08);
  text-decoration:none;
}
.hero{
  background: radial-gradient(1200px 400px at 20% 20%, rgba(255,179,71,.55), transparent 60%),
              radial-gradient(900px 360px at 80% 30%, rgba(11,60,93,.25), transparent 60%),
              linear-gradient(135deg, var(--navy) 0%, var(--navy2) 55%, #051b2c 100%);
  color:#fff;
  padding:58px 0 42px;
}
.hero-grid{
  display:grid; gap:26px;
  grid-template-columns: 1.2fr .8fr;
  align-items:center;
}
@media (max-width:900px){ .hero-grid{grid-template-columns:1fr} }
.hero h1{margin:0 0 10px; font-size:2.1rem; line-height:1.25}
.hero p{margin:0 0 18px; color:rgba(255,255,255,.88)}
.badges{display:flex;gap:10px;flex-wrap:wrap;margin:14px 0 0}
.badge{
  display:inline-flex; align-items:center; gap:8px;
  background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.18);
  padding:8px 10px;
  border-radius:999px;
  font-size:.92rem;
}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:14px}
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding:12px 16px; border-radius:14px;
  border:1px solid rgba(255,255,255,.2);
  font-weight:800;
}
.btn.primary{background:var(--gold); color:#111827; border-color:transparent}
.btn.ghost{background:rgba(255,255,255,.12); color:#fff}
.cards{
  display:grid; grid-template-columns: repeat(3, 1fr);
  gap:16px; margin-top:-24px;
}
@media (max-width:900px){ .cards{grid-template-columns:1fr} }
.card{
  background:var(--card); border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:18px;
  border:1px solid rgba(2,8,23,.06);
}
.card .icon{width:54px;height:54px;object-fit:contain}
.card h3{margin:10px 0 6px; font-size:1.05rem}
.card p{margin:0;color:var(--muted)}
.section{padding:22px 0}
.grid-2{display:grid; grid-template-columns: 1fr 1fr; gap:18px}
@media (max-width:900px){ .grid-2{grid-template-columns:1fr} }
.prose{
  background:#fff; border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:22px;
  border:1px solid rgba(2,8,23,.06);
}
.prose h2{margin-top:0; color:var(--navy)}
.kicker{
  display:inline-block;
  background:rgba(255,138,0,.12);
  border:1px solid rgba(255,138,0,.25);
  color:#7a3e00;
  padding:6px 10px;
  border-radius:999px;
  font-weight:700;
  font-size:.9rem;
}
.toc{
  background:rgba(11,60,93,.06);
  border:1px solid rgba(11,60,93,.12);
  border-radius:var(--radius);
  padding:14px 16px;
}
.toc ul{margin:10px 0 0; padding:0 18px}
.callout{
  border-radius:var(--radius);
  padding:14px 16px;
  border:1px solid rgba(2,8,23,.08);
  background:linear-gradient(180deg, rgba(255,179,71,.22), rgba(255,255,255,.9));
}
.links ul{margin:8px 0 0; padding:0 18px}
.figure{
  background:#fff;border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:10px;
  border:1px solid rgba(2,8,23,.06);
}
.figure img{width:100%; border-radius:14px; display:block}
.footer{
  margin-top:26px;
  padding:26px 0 34px;
  color:#64748b;
  text-align:center;
}
.small{font-size:.92rem; color:#64748b}
hr.sep{border:none;border-top:1px solid rgba(2,8,23,.08); margin:18px 0}
.video{
  position:relative; padding-top:56.25%;
  border-radius:16px; overflow:hidden; background:#000;
}
.video iframe{
  position:absolute; inset:0; width:100%; height:100%;
  border:0;
}

/* Floating nav: compact FAB bottom-left + panel */
#overlay-toggle{
  position:fixed;
  top:82px;
  left:16px;
  width:54px;
  height:54px;
  border-radius:14px;
  background:#ffffff;
  border:1px solid #d1d5db;
  box-shadow:0 12px 24px rgba(0,0,0,0.18);
  display:flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  z-index:901;
  transition: transform .15s ease, box-shadow .15s ease;
}
#overlay-toggle:hover{
  box-shadow:0 14px 28px rgba(0,0,0,0.22);
  transform: translateY(-1px);
}
#overlay-toggle .hamburger{
  width:22px;
  height:14px;
  position:relative;
  display:block;
}
#overlay-toggle .hamburger::before,
#overlay-toggle .hamburger::after,
#overlay-toggle .hamburger span{
  content:'';
  position:absolute;
  left:0;
  width:100%;
  height:2px;
  background:#111827;
  border-radius:3px;
}
#overlay-toggle .hamburger span{ top:5px; }
#overlay-toggle .hamburger::before{ top:0; }
#overlay-toggle .hamburger::after{ bottom:0; }

#overlay-nav{
  position:fixed;
  bottom:72px;
  left:16px;
  z-index:900;
  background:#ffffff;
  color:#111;
  padding:12px 14px;
  border:1px solid #d1d5db;
  border-radius:12px;
  box-shadow:0 18px 36px rgba(0,0,0,0.2);
  max-width:260px;
  max-height:70vh;
  overflow:auto;
  direction:rtl;
  opacity:0;
  pointer-events:none;
  transform: translateY(8px);
  transition: opacity .2s ease, transform .2s ease;
}
#overlay-nav.open{
  opacity:1;
  transform: translateY(0);
  pointer-events:auto;
}
#overlay-nav h4 { margin: 0 0 8px; font-size: 16px; color:#0f172a; }
#overlay-nav ul { list-style: none; margin: 0; padding: 0; }
#overlay-nav li { margin: 4px 0; }
#overlay-nav a { color: #1f2937; font-weight: 700; text-decoration: none; }
#overlay-nav a:hover { color: #d6a100; }