/* schritte-in-km.de, mobile-first, kein Framework */
:root{
  --accent:#0e7c66; --accent-dark:#0a5c4c; --ink:#182220; --muted:#5b6b66;
  --bg:#f3f7f5; --card:#fff; --line:#dfe8e4; --hl:#e5f4ef;
  --shadow:0 1px 3px rgba(0,0,0,.07),0 8px 24px rgba(0,0,0,.05);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6}
.wrap{max-width:780px;margin:0 auto;padding:0 18px}
a{color:var(--accent-dark)}
header{background:linear-gradient(135deg,var(--accent),var(--accent-dark));color:#fff;padding:30px 0 26px}
header .wrap{display:flex;flex-direction:column;gap:6px}
.topbar{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.brand{font-weight:800;font-size:1.35rem;color:#fff;text-decoration:none}
nav.main a{color:#e2f5ee;text-decoration:none;font-size:.9rem;font-weight:600;margin-left:16px}
header p.lead{margin:8px 0 0;opacity:.94;max-width:60ch;font-size:1.02rem}
main{padding:22px 0 50px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px;margin:18px 0;box-shadow:var(--shadow)}
h1{font-size:1.55rem;margin:0 0 8px;line-height:1.25}
h2{font-size:1.2rem;margin:0 0 4px}
h3{font-size:1.02rem;margin:18px 0 6px}
.sub{color:var(--muted);font-size:.9rem;margin:0 0 16px}
label{display:block;font-size:.82rem;font-weight:600;color:var(--muted);margin-bottom:5px}
input[type=number],select{width:100%;padding:10px 11px;border:1px solid var(--line);border-radius:9px;font-size:1rem;background:#fff;color:var(--ink)}
input:focus,select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(14,124,102,.15)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.io{display:grid;grid-template-columns:1fr auto 1fr;gap:12px;align-items:end}
.io .arrow{padding-bottom:10px;color:var(--muted);font-weight:700}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.chips button{background:var(--hl);border:1px solid var(--line);color:var(--accent-dark);padding:8px 14px;border-radius:999px;font-weight:700;font-size:.9rem;cursor:pointer}
.chips button:hover{background:#d3ece3}
.ergebnis{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:16px}
.kachel{background:var(--hl);border-radius:11px;padding:12px 10px;text-align:center}
.kachel .wert{font-size:1.35rem;font-weight:800;color:var(--accent-dark);line-height:1.2}
.kachel .einheit{font-size:.78rem;color:var(--muted);font-weight:600}
.sl-anzeige{margin-top:14px;font-size:.9rem;color:var(--muted);background:#f6f9f7;border:1px dashed var(--line);border-radius:9px;padding:9px 12px}
.sl-anzeige strong{color:var(--accent-dark)}
table{width:100%;border-collapse:collapse;margin-top:12px;font-size:.92rem}
th,td{text-align:right;padding:8px;border-bottom:1px solid var(--line)}
th:first-child,td:first-child{text-align:left}
.prose h2{font-size:1.25rem;margin:26px 0 8px}
.prose h2:first-child{margin-top:0}
.prose p{margin:0 0 12px}
.prose ul{margin:0 0 12px;padding-left:22px}
.formel{background:#f6f9f7;border-left:4px solid var(--accent);border-radius:0 9px 9px 0;padding:12px 14px;margin:12px 0;font-weight:600}
.hinweis{background:#fdf6e8;border:1px solid #f0e2bd;border-radius:10px;padding:12px 14px;font-size:.88rem;color:#6b5b2a;margin-top:16px}
.faq details{border:1px solid var(--line);border-radius:10px;padding:2px 14px;margin:10px 0;background:#fff}
.faq summary{cursor:pointer;font-weight:700;padding:12px 0}
.cta{display:inline-block;background:var(--accent);color:#fff;text-decoration:none;font-weight:700;padding:11px 18px;border-radius:9px;margin-top:6px}
.cta:hover{background:var(--accent-dark)}
footer{border-top:1px solid var(--line);padding:22px 0 50px;color:var(--muted);font-size:.82rem}
footer a{color:var(--muted)}
@media(max-width:640px){
  .grid4{grid-template-columns:1fr 1fr}
  .ergebnis{grid-template-columns:1fr 1fr}
  .io{grid-template-columns:1fr;gap:8px}
  .io .arrow{display:none}
}