:root{
  --bg:#0f0f0f;--text:#1a1a1a;--muted:#f6f6f6;--brand:#c51f2a;--brand-dark:#a01821;--white:#fff;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Helvetica,Arial,sans-serif;color:var(--text);background:#fff;line-height:1.6}
img{max-width:100%;height:auto;display:block}
.container{width:min(1100px,92%);margin-inline:auto}
.header-inner{display:flex;gap:1rem;align-items:center;justify-content:space-between;padding:0.75rem 0}
.site-header{position:sticky;top:0;background:rgba(255,255,255,.9);backdrop-filter:saturate(1.2) blur(8px);z-index:1000;border-bottom:1px solid #eee}
.site-header.simple{position:static}
.logo{height:42px;width:auto}
.main-nav a{color:var(--text);text-decoration:none;margin-left:1rem;font-weight:600;opacity:.9}
.main-nav a:hover{color:var(--brand)}
.btn{display:inline-block;padding:.75rem 1rem;border-radius:.5rem;text-decoration:none;font-weight:700}
.btn-primary{background:var(--brand);color:var(--white)}
.btn-primary:hover{background:var(--brand-dark)}
.btn-ghost{color:var(--brand);border:2px solid var(--brand)}
.btn-ghost:hover{background:var(--brand);color:#fff}
.hero{position:relative;min-height:72vh;display:grid;place-items:center;background:url('../img/keller.jpg') center/cover no-repeat}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,.35),rgba(0,0,0,.55))}
.hero-content{position:relative;text-align:center;color:#fff}
.hero h1{font-size:clamp(2rem,6vw,3.5rem);margin:.5rem 0}
.hero p{font-size:clamp(1rem,2vw,1.25rem);opacity:.95}
.section{padding:4rem 0}
.section-muted{background:var(--muted)}
.two-col{display:grid;grid-template-columns:1.1fr .9fr;gap:2rem;align-items:center}
.two-col.reverse{grid-template-columns:.9fr 1.1fr}
@media (max-width:900px){.two-col,.two-col.reverse{grid-template-columns:1fr}}
.checklist{list-style:none;padding:0;margin:1rem 0}
.checklist li{padding-left:1.6rem;position:relative;margin:.5rem 0}
.checklist li::before{content:'✔';position:absolute;left:0;color:var(--brand)}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin-top:1rem}
.card{background:#fff;border:1px solid #eee;border-radius:.75rem;padding:1rem;box-shadow:0 2px 6px rgba(0,0,0,.04)}
@media (max-width:900px){.cards{grid-template-columns:1fr}}
.badge{max-width:280px;margin-inline:auto}
.note{opacity:.8}
.site-footer{background:#111;color:#ddd}
.site-footer .container{display:flex;align-items:center;justify-content:space-between;padding:1rem 0}
.site-footer a{color:#ddd;text-decoration:none;margin-left:1rem}
.legal h1{margin-top:1rem}
.to-top{position:fixed;right:1rem;bottom:1rem;padding:.6rem .7rem;border:none;border-radius:.5rem;background:var(--brand);color:#fff;cursor:pointer;display:none;box-shadow:0 4px 16px rgba(0,0,0,.25)}
.to-top.show{display:block}