/* lektion.css — gemeinsames Layout für alle Lektionen der Wirtschaftsschule.
   Lokal eingebunden via <link rel="stylesheet" href="lektion.css">. Keine externe Abhängigkeit. */
:root{
  --bg:#0e1320; --panel:#161d2e; --panel2:#1d2740; --line:#2a3550;
  --txt:#e7ecf5; --muted:#9aa6bf; --accent:#5db0ff; --pos:#39d98a; --neg:#ff6b6b; --gold:#ffd166; --frei:#39d98a; --purple:#c98bff;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--txt);font-family:-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.7;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}
a{color:var(--accent)}
header.hero{padding:44px 24px 28px;background:radial-gradient(900px 300px at 50% -40px,rgba(255,209,102,0.10),transparent),#11182a;border-bottom:1px solid var(--line)}
.crumb{font-size:12px;color:var(--muted);margin-bottom:8px}
header.hero h1{margin:0;font-size:29px;letter-spacing:.2px;line-height:1.25}
header.hero .sub{color:var(--muted);font-size:15px;margin-top:8px;max-width:760px}
.container{max-width:780px;margin:0 auto;padding:26px 24px 40px}
h2{font-size:21px;margin:30px 0 8px}
h3{font-size:16px;color:var(--accent);margin:22px 0 6px}
p{margin:10px 0;color:#d9e0ee}
.lead{font-size:17px;color:var(--txt)}
.formula{background:var(--panel2);border:1px solid var(--line);border-left:3px solid var(--gold);border-radius:8px;padding:12px 16px;margin:14px 0;font-family:"Cambria Math",Georgia,serif;font-size:17px;overflow-x:auto}
.fact{background:rgba(93,176,255,0.07);border:1px solid var(--line);border-radius:10px;padding:12px 16px;margin:16px 0;font-size:14px;color:var(--muted)}
.fact b{color:var(--accent)}
.money{background:linear-gradient(180deg,rgba(57,217,138,0.10),transparent);border:1px solid var(--line);border-left:3px solid var(--frei);border-radius:10px;padding:14px 16px;margin:18px 0}
.money h3{color:var(--frei);margin-top:0}
.tool,.calc{background:linear-gradient(180deg,rgba(255,255,255,.02),transparent),var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px;margin:18px 0;box-shadow:0 10px 30px rgba(0,0,0,.22),inset 0 1px 0 rgba(255,255,255,.04)}
.tool .row,.calc .row{display:flex;justify-content:space-between;font-size:13px;margin-bottom:6px}
.tool .row b,.calc .row b{color:var(--gold);font-variant-numeric:tabular-nums}
.tool input[type=range],.calc input[type=range]{width:100%;accent-color:var(--gold);margin-bottom:14px}
.tool .out,.calc .out{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:10px 0 14px}
.tool .o,.calc .o{background:var(--panel2);border-radius:8px;padding:10px 12px}
.tool .o .k,.calc .o .k{font-size:11px;color:var(--muted)}
.tool .o .v,.calc .o .v{font-size:20px;font-weight:700;font-variant-numeric:tabular-nums}
.tool canvas,.calc canvas{width:100%;height:auto;display:block;background:#0b1020;border:1px solid var(--line);border-radius:8px}
.clegend{font-size:11px;color:var(--muted);margin-top:8px}
.clegend i{font-style:normal;display:inline-block;width:14px;border-top:2px solid;margin-right:4px;vertical-align:middle}
ul{color:#d9e0ee} li{margin:6px 0}
.hint{color:var(--muted);font-size:13px}
footer{padding:24px;color:var(--muted);font-size:12px;border-top:1px solid var(--line);text-align:center}