/* Grundstil */
:root{--bg:#ffffff;--panel:#ffffff;--text:#1c4174;--muted:#1c4174;--brand:#1c4174;--brand-600:#17355f;--accent:#6dd3ff;--ring:rgba(46,170,220,.2);--max:1400px;--header-blue:#ffffff}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.6;color:var(--text);background-color:#ffffff}

/* Layout */
.container{max-width:var(--max);margin:0 auto;padding:0 20px}
.site-header{position:sticky;top:0;z-index:50;background:var(--header-blue);border-bottom:1px solid rgba(0,0,0,.06);min-height:200px}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{color:#1c4174;text-decoration:none;font-weight:700;letter-spacing:.2px}
.site-nav ul{display:flex;gap:18px;list-style:none;margin:0;padding:0}
.site-nav a{color:#1c4174;text-decoration:none;padding:8px 10px;border-radius:10px;transition:.2s background-color,.2s opacity}
.site-nav a:hover{opacity:.85;background-color:rgba(28,65,116,.08)}
.site-nav a.active{font-weight:700;color:#fff}

/* Hamburger */
.nav-toggle{display:none;position:relative;width:40px;height:40px;border:1px solid rgba(28,65,116,.25);border-radius:10px;background:transparent;color:#1c4174;cursor:pointer}
.nav-toggle .bar{display:block;width:20px;height:2px;background:#1c4174;margin:4px auto;transition:.2s transform,.2s opacity}
input.nav-checkbox{position:absolute;opacity:0;pointer-events:none}

/* Header Bild */
.header-image{width:100%;line-height:0;position:absolute;inset:0;z-index:1}
.header-image img{width:100%;height:100%;display:block;object-fit:cover}
.header-image.small img{height:100%}

/* Home: Bild hinter den Text legen */
.site-header{position:sticky}
.site-header .header-inner{position:relative;z-index:2}
.site-header::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg, rgba(255,255,255,.4), rgba(255,255,255,.9) 60%);z-index:1}
body[data-page="home"] .site-header{min-height:420px}

/* Content */
.content{padding:40px 0 60px;background-color:#ffffff}
.content h1{font-size:clamp(28px,2.8vw,40px);line-height:1.2;margin:10px 0 20px;display:block}
.content h1,.content h2,.content h3,.content h4,.content h5,.content h6{color:#0b2a5b}
.content h2{font-size:clamp(20px,2vw,28px);line-height:1.25;margin:24px 0 12px}
.content p{color:var(--muted)}

/* Cards 3 */
.cards-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:26px}
.card{background:var(--panel);border:1px solid rgba(0,0,0,.06);border-radius:16px;overflow:hidden;box-shadow:0 10px 30px rgba(0,0,0,.06)}
.card img{display:block;width:100%;height:200px;object-fit:cover}
.card h2{margin:16px 16px 8px}
.card p{margin:0 16px 20px}

/* Tabs */
.tabs{margin-top:20px}
.tab-list{display:flex;gap:10px;flex-wrap:wrap}
.tab{appearance:none;border:1px solid rgba(0,0,0,.12);background:#ffffff;color:var(--text);padding:10px 14px;border-radius:12px;cursor:pointer;transition:.2s background,.2s border-color}
.tab[aria-selected="true"], .tab:hover{background:rgba(28,65,116,.08);border-color:var(--brand)}
.tab-panel{background:var(--panel);border:1px solid rgba(0,0,0,.06);border-radius:16px;padding:18px;margin-top:14px}
.tab-panel.hidden{display:none}
.tab-panel img{width:100%;height:auto;border-radius:12px;margin:10px 0}

/* Footer */
.site-footer{border-top:1px solid rgba(0,0,0,.06);padding:20px 0;background:#ffffff}
.footer-inner{display:flex;align-items:center;justify-content:center;color:var(--muted)}

/* Media */
@media (max-width: 960px){
  .cards-3{grid-template-columns:1fr 1fr}
}
@media (max-width: 700px){
  .header-inner{height:60px}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center}
  .site-nav{position:absolute;inset:60px 0 auto 0;background:#ffffff;border-bottom:1px solid rgba(0,0,0,.08);transform:translateY(-100%);transition:.25s transform;will-change:transform}
  /* CSS-only toggle via checkbox */
  .nav-checkbox:checked ~ .site-nav{transform:translateY(0)}
  .site-nav ul{flex-direction:column;padding:14px}
  .site-nav a{padding:12px 10px;font-size:16px}
  .cards-3{grid-template-columns:1fr}
}

/* Fokus & Accessiblity */
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* Hilfsklassen */
.hidden{display:none}