:root {
  --bg: #F6F8F3;
  --card: #FFFFFF;
  --text: #17241D;
  --muted: #5A6A61;
  --border: #E2E8DF;
  --primary: #1F7A4D;
  --primary-dark: #165C39;
  --primary-soft: #E3F1E8;
  --sun: #F2B705;
  --sun-soft: #FFF5D6;
  --sun-text: #8A6300;
  --radius: 16px;
  --shadow: 0 2px 10px rgba(23, 36, 29, .06);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
}
a { color: var(--primary); }
img, svg { max-width: 100%; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }
.narrow { max-width: 760px; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 16px; background: #fff; padding: 8px 12px; z-index: 10; }

/* Kopf */
.top { background: var(--card); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 5; }
.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); font-weight: 800; font-size: 1.35rem; letter-spacing: -.02em; }
.brand b { color: var(--primary); font-weight: 800; }
.nav { display: flex; gap: 20px; flex-wrap: wrap; }
.nav a { color: var(--text); text-decoration: none; font-weight: 600; font-size: .95rem; }
.nav a:hover { color: var(--primary); }
@media (max-width: 560px) { .nav { gap: 12px; } .nav a { font-size: .88rem; } .brand { font-size: 1.15rem; } }

/* Hero */
.hero { padding: 56px 0 40px; }
.hero h1 { font-size: clamp(2rem, 5vw, 3.1rem); line-height: 1.1; letter-spacing: -.02em; margin: 0 0 16px; max-width: 760px; }
.hero h1 em { font-style: normal; color: var(--primary); }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 680px; margin: 0 0 24px; }
.btn { display: inline-block; background: var(--primary); color: #fff; text-decoration: none; font-weight: 700; padding: 13px 22px; border-radius: 12px; border: 0; font-size: 1rem; cursor: pointer; }
.btn:hover { background: var(--primary-dark); }
.btn.ghost { background: transparent; color: var(--primary); border: 2px solid var(--primary); }
.badges { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; padding: 0; list-style: none; }
.badges li { background: var(--card); border: 1px solid var(--border); border-radius: 999px; padding: 5px 14px; font-size: .9rem; color: var(--muted); }

/* Abschnitte */
.section { padding: 48px 0; }
.section.alt { background: var(--card); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section h2 { font-size: clamp(1.5rem, 3.5vw, 2rem); letter-spacing: -.01em; line-height: 1.2; margin: 0 0 10px; }
.section-lead { color: var(--muted); margin: 0 0 28px; max-width: 720px; }

/* Rechner */
.calc { display: grid; grid-template-columns: 1.1fr 1fr; gap: 24px; align-items: start; }
@media (max-width: 860px) { .calc { grid-template-columns: 1fr; } }
.panel { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); }
.field { margin-bottom: 16px; }
.field label, .field .label { display: block; font-weight: 700; font-size: .95rem; margin-bottom: 6px; }
.field small { display: block; color: var(--muted); font-size: .82rem; margin-top: 4px; }
select, input[type=number], input[type=text] {
  width: 100%; font: inherit; font-size: 1rem; padding: 10px 12px; border: 1px solid #CBD5CE; border-radius: 10px; background: #fff; color: var(--text);
}
select:focus, input:focus { outline: 3px solid var(--primary-soft); border-color: var(--primary); }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 420px) { .row2 { grid-template-columns: 1fr; } }
.toggle { display: flex; align-items: center; gap: 10px; font-weight: 700; cursor: pointer; }
.toggle input { width: 20px; height: 20px; accent-color: var(--primary); }
.storage-fields { display: none; margin-top: 12px; }
.storage-on .storage-fields { display: grid; }

.results { position: sticky; top: 84px; }
.result-main { background: var(--primary); color: #fff; border-radius: var(--radius); padding: 22px; margin-bottom: 14px; }
.result-main .k { font-size: .9rem; opacity: .85; }
.result-main .v { font-size: 2.4rem; font-weight: 800; line-height: 1.1; letter-spacing: -.02em; }
.result-main .s { font-size: .95rem; opacity: .9; margin-top: 4px; }
.kpis { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.kpi { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 14px; }
.kpi .k { font-size: .82rem; color: var(--muted); }
.kpi .v { font-size: 1.35rem; font-weight: 800; }
.kpi.sun { background: var(--sun-soft); border-color: #F5E2A0; }
.kpi.sun .v { color: var(--sun-text); }
.note { font-size: .82rem; color: var(--muted); margin-top: 12px; }
.verdict { margin-top: 14px; background: var(--primary-soft); border-radius: 14px; padding: 14px; font-size: .95rem; }

/* Karten */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); }
.card h3 { margin: 0 0 8px; font-size: 1.15rem; }
.card p { margin: 0; color: var(--muted); }
.card .tag { display: inline-block; font-size: .78rem; font-weight: 700; color: var(--sun-text); background: var(--sun-soft); border-radius: 999px; padding: 2px 10px; margin-bottom: 10px; }
a.card { text-decoration: none; color: inherit; display: block; }
a.card:hover { border-color: var(--primary); }
a.card .more { display: inline-block; margin-top: 12px; color: var(--primary); font-weight: 700; }

/* Tabelle */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; background: var(--card); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
th, td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--border); vertical-align: top; font-size: .95rem; }
th { background: var(--primary-soft); font-size: .85rem; text-transform: uppercase; letter-spacing: .03em; }
tr:last-child td { border-bottom: 0; }

/* FAQ */
.faq details { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 4px 18px; margin-bottom: 10px; }
.faq summary { cursor: pointer; font-weight: 700; padding: 12px 0; }
.faq p { margin: 0 0 14px; color: var(--muted); }

/* Artikel */
.article { padding: 40px 0 24px; }
.article h1 { font-size: clamp(1.8rem, 4.5vw, 2.6rem); line-height: 1.15; letter-spacing: -.02em; margin: 8px 0 14px; }
.article h2 { font-size: 1.4rem; margin: 34px 0 10px; }
.article .meta { color: var(--muted); font-size: .9rem; }
.article ul, .article ol { padding-left: 22px; }
.article li { margin-bottom: 6px; }
.box { background: var(--sun-soft); border-left: 4px solid var(--sun); border-radius: 10px; padding: 14px 18px; margin: 20px 0; }
.box.green { background: var(--primary-soft); border-color: var(--primary); }
.crumbs { font-size: .85rem; color: var(--muted); }
.crumbs a { color: var(--muted); }
.sources { font-size: .85rem; color: var(--muted); }

/* Fuß */
footer { margin-top: 40px; padding: 32px 0; border-top: 1px solid var(--border); color: var(--muted); font-size: .88rem; }
footer a { color: var(--muted); }
footer .links { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 8px; }
section[id], h2[id] { scroll-margin-top: 80px; }
.months { margin-top: 14px; background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 14px; }
.months .k { font-size: .82rem; color: var(--muted); margin-bottom: 8px; }
.bars { display: grid; grid-template-columns: repeat(12, 1fr); gap: 4px; height: 90px; align-items: end; }
.bar { height: 100%; display: flex; flex-direction: column; justify-content: flex-end; align-items: center; }
.bar span { width: 100%; background: var(--sun); border-radius: 4px 4px 0 0; display: block; }
.bar em { font-style: normal; font-size: .7rem; color: var(--muted); margin-top: 3px; }
.kpi .mini { font-size: .72rem; color: var(--muted); line-height: 1.35; margin-top: 4px; }