/* =====================================================================
   Rechenwerk24 — gemeinsames Stylesheet
   Designsystem: Space Grotesk / Inter / JetBrains Mono
   ===================================================================== */
:root{
  --bg:#fbfbf9; --card:#ffffff; --ink:#16181C; --muted:#6B6F76; --line:#E2E0D7;
  --keep:#2E6F4E; --keep-l:#E4EFE8;
  --tax:#9C6B2E; --tax-l:#F1E7D7;
  --soz:#3F5566; --soz-l:#E2E8EC;
  --shadow:0 1px 2px rgba(20,24,28,.04),0 8px 24px rgba(20,24,28,.05);
  --r:14px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);background-image:linear-gradient(rgba(20,24,28,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(20,24,28,.05) 1px,transparent 1px);background-size:28px 28px;color:var(--ink);
  font-family:'Inter',system-ui,-apple-system,sans-serif;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--keep);text-decoration:none}
a:hover{text-decoration:underline}

/* ---------- Header / Nav ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(239,238,232,.86);
  backdrop-filter:saturate(150%) blur(8px);border-bottom:1px solid var(--line)}
.nav{max-width:1080px;margin:0 auto;padding:13px 20px;display:flex;align-items:center;gap:18px}
.brand{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:17px;letter-spacing:-.01em;color:var(--ink);display:flex;align-items:center;gap:9px}
.brand:hover{text-decoration:none}
.brand .mk{font-family:'JetBrains Mono',monospace;color:var(--tax);font-weight:700}
.nav-links{margin-left:auto;display:flex;gap:4px;flex-wrap:wrap}
.nav-links a{font-size:13.5px;font-weight:600;color:var(--muted);padding:7px 11px;border-radius:8px}
.nav-links a:hover{background:var(--card);color:var(--ink);text-decoration:none}
.nav-links a.active{color:var(--ink)}
@media(max-width:680px){.nav{padding:11px 14px;gap:10px}.brand{font-size:15px}.nav-links a{font-size:13px;padding:6px 8px}}

.container{max-width:1080px;margin:0 auto;padding:0 20px}
.narrow{max-width:840px;margin:0 auto;padding:0 20px}

/* ---------- Hero / Hub ---------- */
.hero{padding:46px 0 26px;text-align:center}
.eyebrow{font-family:'Space Grotesk',sans-serif;font-weight:600;font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--tax)}
.hero h1{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:clamp(30px,6vw,50px);line-height:1.05;letter-spacing:-.022em;margin:14px 0}
.hero p{color:var(--muted);font-size:17px;max-width:62ch;margin:0 auto}

/* ---------- Hub-Karten ---------- */
.tool-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px;margin:30px 0 10px}
.tool{position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px;display:flex;flex-direction:column;gap:8px;color:inherit;transition:transform .15s,box-shadow .15s}
a.tool:hover{transform:translateY(-3px);box-shadow:var(--shadow);text-decoration:none}
.tool .ic{font-family:'JetBrains Mono',monospace;font-size:20px;color:var(--keep)}
.tool h3{font-family:'Space Grotesk',sans-serif;font-weight:600;font-size:18px;margin:0}
.tool p{color:var(--muted);font-size:14px;margin:0;flex:1}
.tool .go{color:var(--keep);font-weight:600;font-size:14px;margin-top:6px}
.tool.soon{opacity:.72}
.badge{position:absolute;top:14px;right:14px;font-size:11px;font-weight:600;letter-spacing:.04em;text-transform:uppercase;padding:3px 8px;border-radius:999px}
.badge.live{background:var(--keep-l);color:var(--keep);border:1px solid #cfe2d6}
.badge.soon{background:var(--tax-l);color:var(--tax);border:1px solid #e3d3b9}

/* ---------- Section ---------- */
section.block{padding:36px 0;border-top:1px solid var(--line)}
section.block h2{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:clamp(20px,3vw,27px);letter-spacing:-.015em;margin:0 0 10px}
.lead{color:var(--muted);font-size:16px;max-width:65ch}

/* ===================== Rechner-Komponenten ===================== */
.calc-wrap{display:grid;grid-template-columns:1fr 1fr;gap:22px;align-items:start;margin:10px 0 8px}
@media(max-width:860px){.calc-wrap{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow)}
.pad{padding:22px}
.card h2.ttl{font-family:'Space Grotesk',sans-serif;font-weight:600;font-size:15px;letter-spacing:.02em;margin:0 0 16px;color:var(--muted);text-transform:uppercase}
.field{margin-bottom:16px}
.field:last-child{margin-bottom:0}
label.lab{display:block;font-size:13.5px;font-weight:600;margin-bottom:7px}
.lab .hint{font-weight:400;color:var(--muted)}
.numbox{display:flex;align-items:center;background:#fff;border:1.5px solid var(--line);border-radius:10px;overflow:hidden}
.numbox:focus-within{border-color:var(--keep)}
.numbox input{flex:1;border:0;outline:0;padding:11px 13px;font-size:16px;font-family:'JetBrains Mono',monospace;background:transparent;color:var(--ink);width:100%}
.numbox .suf{padding:0 13px;color:var(--muted);font-size:14px;font-family:'JetBrains Mono',monospace}
.seg{display:flex;gap:5px;background:#fff;border:1.5px solid var(--line);border-radius:10px;padding:4px}
.seg button{flex:1;border:0;background:transparent;padding:9px 8px;border-radius:7px;font-size:13.5px;font-weight:600;color:var(--muted);cursor:pointer;font-family:inherit;transition:all .12s}
.seg button[aria-pressed="true"]{background:var(--ink);color:#fff}
.seg.small button{padding:7px 6px;font-size:13px}
select{width:100%;padding:11px 13px;border:1.5px solid var(--line);border-radius:10px;background:#fff;font-size:15px;font-family:inherit;color:var(--ink);cursor:pointer}
select:focus{outline:0;border-color:var(--keep)}
.switch{display:flex;align-items:center;justify-content:space-between;gap:12px}
.toggle{width:44px;height:25px;border-radius:999px;border:0;background:var(--line);position:relative;cursor:pointer;flex:none;transition:background .15s}
.toggle[aria-pressed="true"]{background:var(--keep)}
.toggle::after{content:"";position:absolute;top:2.5px;left:2.5px;width:20px;height:20px;border-radius:50%;background:#fff;transition:transform .15s}
.toggle[aria-pressed="true"]::after{transform:translateX(19px)}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}

/* Ergebnis */
.result .big{padding:6px 2px 14px;border-bottom:1px solid var(--line);margin-bottom:14px}
.result .big .k{font-size:13px;color:var(--muted);font-weight:600}
.result .big .v{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:clamp(30px,6vw,42px);letter-spacing:-.02em;color:var(--keep);line-height:1.1;margin-top:2px}
.cmp{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:14px}
.cmp .box{border:1px solid var(--line);border-radius:11px;padding:13px}
.cmp .box.good{background:var(--keep-l);border-color:#cfe2d6}
.cmp .box.bad{background:var(--tax-l);border-color:#e3d3b9}
.cmp .box .lbl{font-size:12px;font-weight:600;color:var(--muted)}
.cmp .box .num{font-family:'JetBrains Mono',monospace;font-weight:600;font-size:19px;margin-top:3px}
.rows{margin-top:4px}
.rows .r{display:flex;justify-content:space-between;align-items:baseline;padding:9px 0;border-bottom:1px solid var(--line);font-size:14.5px}
.rows .r:last-child{border-bottom:0}
.rows .r .val{font-family:'JetBrains Mono',monospace;font-weight:600}
.rows .r.hl{font-weight:700}
.rows .r.hl .val{color:var(--keep)}
.kpis{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.kpi{flex:1;min-width:120px;background:#fff;border:1px solid var(--line);border-radius:11px;padding:12px 14px}
.kpi .kl{font-size:12px;color:var(--muted);font-weight:600}
.kpi .kv{font-family:'JetBrains Mono',monospace;font-weight:700;font-size:18px;margin-top:3px}
.savings{background:var(--keep);color:#fff;border-radius:12px;padding:14px 16px;margin-top:14px;display:flex;justify-content:space-between;align-items:center}
.savings .l{font-size:14px;font-weight:600}
.savings .v{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:22px}

.note{background:var(--tax-l);border:1px solid #e3d3b9;border-radius:11px;padding:13px 15px;font-size:13.5px;color:#6f4e1f;margin-top:16px}
.note b{color:#5a3f17}
.disclaimer{font-size:12.5px;color:var(--muted);margin-top:14px;line-height:1.5}

/* Prose */
.prose{font-size:16px}
.prose h2{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:23px;margin:32px 0 10px;letter-spacing:-.01em}
.prose h3{font-family:'Space Grotesk',sans-serif;font-weight:600;font-size:18px;margin:22px 0 8px}
.prose p{margin:0 0 14px}
.prose ul{margin:0 0 14px;padding-left:22px}
.prose li{margin:0 0 6px}
.prose strong{font-weight:600}
.crosslinks{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin:18px 0}
.xl{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px;color:inherit;display:block}
.xl:hover{box-shadow:var(--shadow);text-decoration:none}
.xl h4{font-family:'Space Grotesk',sans-serif;font-size:15px;margin:0 0 4px}
.xl p{font-size:13px;color:var(--muted);margin:0}

/* Footer */
.site-footer{border-top:1px solid var(--line);margin-top:46px;background:var(--card)}
.foot{max-width:1080px;margin:0 auto;padding:30px 20px;display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}
.foot p{font-size:13px;color:var(--muted);margin:0;max-width:42ch}
.foot .links{display:flex;gap:18px;flex-wrap:wrap}
.foot .links a{font-size:13.5px;color:var(--ink);font-weight:500}
.foot-bottom{border-top:1px solid var(--line);text-align:center;padding:15px;font-size:12px;color:var(--muted)}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto}}

/* Dropdown-Navigation */
.navdd{position:relative}
.navdd>summary{list-style:none;cursor:pointer;font-size:13.5px;font-weight:600;color:var(--muted);padding:7px 11px;border-radius:8px;user-select:none}
.navdd>summary::-webkit-details-marker{display:none}
.navdd>summary::after{content:" \25BE";font-size:11px}
.navdd>summary:hover{background:var(--card);color:var(--ink)}
.navdd[open]>summary{color:var(--ink);background:var(--card)}
.navdd-panel{position:absolute;top:100%;right:0;margin-top:6px;background:var(--card);border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);padding:8px;min-width:230px;max-height:70vh;overflow-y:auto;display:flex;flex-direction:column;gap:2px;z-index:60}
.navdd-panel a{font-size:14px;font-weight:500;color:var(--ink);padding:8px 12px;border-radius:8px}
.navdd-panel a:hover{background:var(--bg);text-decoration:none}
.navdd-panel a.active{background:var(--keep-l);color:var(--keep)}

/* Buttons */
.btn{display:inline-block;border:0;background:var(--ink);color:#fff;font-family:inherit;font-weight:600;font-size:14px;padding:10px 16px;border-radius:9px;cursor:pointer;transition:opacity .12s}
.btn:hover{opacity:.85}

/* Sichtbarer Tastatur-Fokus (A11y) */
a:focus-visible,button:focus-visible,summary:focus-visible,select:focus-visible,
input:focus-visible,textarea:focus-visible,[tabindex]:focus-visible{
  outline:2px solid var(--soz);outline-offset:2px;border-radius:6px}
.seg button:focus-visible,.toggle:focus-visible{outline-offset:1px}

/* Segment-Umschalter */
.segbtn{flex:1;border:1px solid var(--line);background:var(--card);color:var(--muted);font-family:inherit;font-weight:600;font-size:13.5px;padding:9px;border-radius:9px;cursor:pointer}
.segbtn.active{background:var(--ink);color:#fff;border-color:var(--ink)}

/* Hub-Cluster-Überschriften */
.cluster-title{font-family:'Space Grotesk',sans-serif;font-size:15px;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--muted);margin:34px 0 14px;padding-bottom:8px;border-bottom:1px solid var(--line)}
.cluster-title:first-of-type{margin-top:8px}

/* FAQ-Bereich (sichtbar, deckt das FAQPage-Schema ab) */
.faq{max-width:760px;margin:22px auto 0;padding:0 20px}
.faq h2{font-family:'Space Grotesk',sans-serif;font-size:20px;letter-spacing:-.01em;margin:0 0 12px;color:var(--ink)}
.faq details{border:1px solid var(--line);border-radius:10px;background:var(--card);margin-bottom:10px;overflow:hidden}
.faq summary{list-style:none;cursor:pointer;padding:14px 16px;font-weight:600;font-size:15px;color:var(--ink);position:relative;padding-right:42px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:16px;top:50%;transform:translateY(-50%);font-size:20px;font-weight:400;color:var(--muted);line-height:1}
.faq details[open] summary::after{content:"–"}
.faq summary:hover{color:var(--keep)}
.faq .faq-a{padding:0 16px 14px;font-size:14.5px;line-height:1.6;color:var(--muted)}

/* ---------- Anzeigenflächen (AdSense) ---------- */
.ad-slot{max-width:728px;margin:22px auto;padding:0;text-align:center;min-height:90px}
.ad-slot .ad-label{display:block;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:0 0 4px;opacity:.7}
.ad-slot ins{background:transparent}