/* fiibu – Digitale Buchhaltung · Stylesheet
   Keine externen Schriften (DSGVO): es werden die Systemschriften des Besuchers genutzt. */
:root{
  --ground:#F2F4F7; --surface:#FFFFFF; --sunk:#E9EDF2; --ink:#14202D; --muted:#566376;
  --line:#D7DEE6; --accent:#0B6E5F; --accent-ink:#FFFFFF; --accent-soft:#E1F0EC; --accent-deep:#084E44;
  --warn:#8A5300; --warn-soft:#FBF0DC; --focus:#1C7FD6; --danger:#B3261E;
  --shadow:0 1px 2px rgba(20,32,45,.06),0 8px 24px rgba(20,32,45,.07);
  --display:"Avenir Next","Segoe UI Variable Display","Segoe UI",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  --body:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,"SF Mono","Cascadia Mono",Menlo,Consolas,"Liberation Mono",monospace;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){
  :root{
    color-scheme:dark;
    --ground:#0E141B; --surface:#16202A; --sunk:#1C2833; --ink:#E6EBF1; --muted:#9AA7B6;
    --line:#2B3845; --accent:#4CC2AE; --accent-ink:#06201B; --accent-soft:#143530; --accent-deep:#8FE0D1;
    --warn:#F0B55A; --warn-soft:#3A2A10; --focus:#6CB6FF; --danger:#FF8A80;
    --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.25);
  }
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
body{margin:0;background:var(--ground);color:var(--ink);font-family:var(--body);font-size:16px;line-height:1.55;padding-inline:16px;padding-block:0 96px}
img,svg{max-width:100%}
[hidden]{display:none!important}
a{color:var(--accent)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--focus);outline-offset:2px}
.wrap{max-width:1180px;margin:0 auto}
.skip{position:absolute;left:-9999px}.skip:focus{left:16px;top:8px;z-index:20;background:var(--surface);padding:8px 12px;border-radius:8px}

/* Kopf */
header.top{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-block:18px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink)}
.brand svg{width:30px;height:30px;flex:none}
.brand b{font-family:var(--display);font-weight:700;font-size:23px;letter-spacing:-.02em}
.brand small{display:block;font-size:12px;color:var(--muted);font-weight:500;letter-spacing:.01em;margin-top:-2px}
nav.main{display:flex;gap:6px 18px;flex-wrap:wrap;align-items:center}
nav.main a{color:var(--ink);text-decoration:none;font-size:15px}
nav.main a:hover{color:var(--accent)}
@media (max-width:720px){nav.main a:not(.btn){display:none}}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:inherit;font-weight:600;font-size:16px;border-radius:10px;padding:12px 20px;border:1px solid transparent;cursor:pointer;text-decoration:none;line-height:1.2}
.btn.primary{background:var(--accent);color:var(--accent-ink)}
.btn.primary:hover{filter:brightness(1.07)}
.btn.ghost{background:var(--surface);color:var(--ink);border-color:var(--line)}
.btn.ghost:hover{border-color:var(--muted)}
.btn.small{font-size:14px;padding:8px 14px}
.btn svg{width:18px;height:18px;flex:none}

/* Hero */
.hero{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:40px;align-items:center;padding-block:36px 48px}
@media (max-width:900px){.hero{grid-template-columns:minmax(0,1fr);gap:28px;padding-block:20px 36px}}
.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.09em;text-transform:uppercase;color:var(--accent)}
.hero h1{font-family:var(--display);font-weight:700;font-size:clamp(34px,5.4vw,58px);line-height:1.03;letter-spacing:-.025em;margin:10px 0 16px;text-wrap:balance}
.hero p.lead{margin:0 0 24px;color:var(--muted);font-size:clamp(17px,1.6vw,19px);max-width:56ch}
.cta{display:flex;flex-wrap:wrap;gap:10px}
.trust{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:22px;font-size:14px;color:var(--muted);padding:0;list-style:none}
.trust li{display:flex;align-items:center;gap:6px}
.trust li::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--accent)}

/* Beleg-Illustration im Hero */
.pile{position:relative;min-height:380px}
.paper{position:absolute;background:var(--surface);border-radius:6px;box-shadow:var(--shadow);padding:18px 20px;font-family:var(--mono);font-size:12.5px;color:var(--muted);width:min(300px,78%)}
.paper b{display:block;color:var(--ink);font-family:var(--body);font-size:14px;margin-bottom:10px}
.paper .r{display:flex;justify-content:space-between;gap:8px;padding:3px 0;border-bottom:1px dashed var(--line)}
.paper .r:last-child{border-bottom:0}
.p1{top:0;left:0;transform:rotate(-5deg)}
.p2{top:78px;left:24%;transform:rotate(3deg)}
.p3{top:170px;right:0;transform:rotate(-1deg);border:1px solid var(--accent)}
.p3 b{color:var(--accent)}
.stamp{display:inline-block;margin-top:10px;font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);border:1.5px solid var(--accent);border-radius:4px;padding:2px 7px;transform:rotate(-4deg)}
@media (max-width:900px){.pile{min-height:370px;max-width:460px}}

/* Abschnitte */
section.block{padding-block:40px}
section.block>h2,.sec-head h2{font-family:var(--display);font-size:clamp(26px,3vw,36px);letter-spacing:-.02em;line-height:1.1;margin:0 0 8px;text-wrap:balance}
.sec-head{max-width:720px;margin-bottom:26px}
.sec-head p{margin:0;color:var(--muted);font-size:17px}
.benefits{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
@media (max-width:860px){.benefits{grid-template-columns:minmax(0,1fr)}}
.benefit{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:22px}
.benefit svg{width:28px;height:28px;color:var(--accent)}
.benefit h3{font-size:18px;margin:12px 0 6px}
.benefit p{margin:0;color:var(--muted);font-size:15.5px}

.steps{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;counter-reset:st}
@media (max-width:980px){.steps{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:560px){.steps{grid-template-columns:minmax(0,1fr)}}
.steps li{counter-increment:st;border-top:2px solid var(--accent);padding-top:14px}
.steps li::before{content:counter(st,decimal-leading-zero);font-family:var(--mono);font-size:13px;color:var(--accent)}
.steps h3{font-size:17px;margin:6px 0 6px}
.steps p{margin:0;color:var(--muted);font-size:15px}

.branchen{display:flex;flex-wrap:wrap;gap:8px;padding:0;list-style:none;margin:0}
.branchen li{background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:6px 14px;font-size:15px}

.faq{display:grid;gap:10px;max-width:820px}
.faq details{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:0 18px}
.faq summary{cursor:pointer;font-weight:600;padding:16px 0;list-style:none;display:flex;justify-content:space-between;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:var(--mono);color:var(--accent);font-size:18px;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details p{margin:0 0 16px;color:var(--muted)}

.contact{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
@media (max-width:860px){.contact{grid-template-columns:minmax(0,1fr)}}
.contact a{display:block;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:20px;text-decoration:none;color:var(--ink)}
.contact a:hover{border-color:var(--accent)}
.contact span{display:block;font-size:13px;color:var(--muted);margin-bottom:4px}
.contact b{font-size:18px;overflow-wrap:anywhere}

/* Rechner */
.grid{display:grid;grid-template-columns:minmax(0,1fr) 380px;gap:28px;align-items:start}
@media (max-width:980px){.grid{grid-template-columns:minmax(0,1fr)}}
section.card{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:24px;margin-bottom:18px}
@media (max-width:480px){section.card{padding:18px}}
section.card h3.t{font-family:var(--display);font-size:21px;font-weight:700;letter-spacing:-.01em;margin:0 0 4px}
section.card .lead{color:var(--muted);margin:0 0 20px;font-size:15px}
.fields{display:grid;gap:22px}
.row2{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:22px}
.field>label.l,.field>.l{display:block;font-weight:600;font-size:15px;margin-bottom:8px}
.field .hint{display:block;color:var(--muted);font-size:13.5px;margin-top:-4px;margin-bottom:9px}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chips input,.models input{position:absolute;opacity:0;pointer-events:none}
.chips label{cursor:pointer;border:1px solid var(--line);background:var(--surface);border-radius:8px;padding:8px 13px;font-size:14.5px;line-height:1.25;transition:border-color .12s,background .12s}
.chips label:hover{border-color:var(--muted)}
.chips input:checked+label{background:var(--accent-soft);border-color:var(--accent);box-shadow:inset 0 0 0 1px var(--accent)}
.chips input:focus-visible+label,.models input:focus-visible+label{outline:2px solid var(--focus);outline-offset:2px}
select,input[type=text],input[type=email],input[type=tel],input[type=number],textarea{width:100%;font:inherit;font-size:16px;color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:10px 12px}
input.short{max-width:200px}
textarea{min-height:96px;resize:vertical}
.num{display:flex;align-items:stretch;width:max-content;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:var(--surface)}
.num button{border:0;background:var(--sunk);color:var(--ink);width:42px;font-size:18px;cursor:pointer}
.num input{border:0;border-radius:0;width:70px;text-align:center;font-family:var(--mono);font-variant-numeric:tabular-nums;-moz-appearance:textfield;appearance:textfield}
.num input::-webkit-outer-spin-button,.num input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}
.range{display:flex;align-items:center;gap:14px}
.range input{flex:1;accent-color:var(--accent)}
.range output{font-family:var(--mono);min-width:56px;text-align:right;font-variant-numeric:tabular-nums}
.models{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:12px}
.models label{display:block;height:100%;cursor:pointer;border:1px solid var(--line);border-radius:12px;padding:16px;background:var(--surface)}
.models label b{display:block;font-family:var(--display);font-size:17px;margin-bottom:6px}
.models label span{display:block;color:var(--muted);font-size:14px;line-height:1.4}
.models label em{display:inline-block;margin-top:10px;font-style:normal;font-size:12.5px;font-weight:600;color:var(--accent)}
.models input:checked+label{border-color:var(--accent);box-shadow:inset 0 0 0 1px var(--accent);background:var(--accent-soft)}
.checks{display:grid;gap:10px}
.check{display:flex;gap:12px;align-items:flex-start;border:1px solid var(--line);border-radius:10px;padding:12px 14px;cursor:pointer}
.check input{margin-top:4px;width:18px;height:18px;accent-color:var(--accent);flex:none}
.check b{display:block;font-size:15px}
.check span{display:block;color:var(--muted);font-size:13.5px}
.check:has(input:checked){border-color:var(--accent);background:var(--accent-soft)}
.note{font-size:13.5px;color:var(--muted);border-left:3px solid var(--line);padding:2px 0 2px 12px;margin:0}
.sub{margin-top:-8px;padding-left:14px;border-left:2px solid var(--accent-soft)}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}

/* Kostenbeleg */
aside.receipt{position:sticky;top:16px}
@media (max-width:980px){aside.receipt{position:static}}
.slip{background:var(--surface);border-radius:4px;box-shadow:var(--shadow);position:relative;padding:22px 22px 26px;font-variant-numeric:tabular-nums}
.slip::after{content:"";position:absolute;left:0;right:0;bottom:-8px;height:8px;background:radial-gradient(circle at 6px 0,var(--surface) 5.5px,transparent 6px) repeat-x;background-size:12px 8px}
.slip .eyebrow{color:var(--muted)}
.slip h3{font-family:var(--display);font-size:22px;margin:4px 0 14px;letter-spacing:-.01em}
.slip .grp{font-family:var(--mono);font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:16px 0 6px}
.line{display:flex;justify-content:space-between;gap:12px;padding:5px 0;font-size:14.5px}
.line .k{min-width:0}
.line .k small{display:block;color:var(--muted);font-size:12.5px}
.line .v{font-family:var(--mono);font-size:13.5px;white-space:nowrap;text-align:right}
.rule{border:0;border-top:1px dashed var(--line);margin:10px 0}
.total{display:flex;justify-content:space-between;align-items:baseline;gap:10px;padding:6px 0}
.total .k{font-weight:700}
.total .v{font-family:var(--mono);font-weight:600;font-size:17px;text-align:right}
.total .v small{display:block;font-weight:400;font-size:12px;color:var(--muted)}
.big{background:var(--accent-soft);border-radius:8px;padding:12px 14px;margin-top:12px}
.big .k{font-size:13px;color:var(--muted)}
.big .v{font-family:var(--mono);font-size:22px;font-weight:600}
.compare{margin-top:12px;font-size:13.5px;color:var(--muted);display:grid;gap:6px}
.compare div{display:flex;justify-content:space-between;gap:10px}
.compare b{font-family:var(--mono);font-weight:500;color:var(--ink);white-space:nowrap}
.fine{font-size:12.5px;color:var(--muted);margin:14px 0 0;line-height:1.45}
.fine.tight{margin-top:4px}
.err{color:var(--danger);font-size:14px;margin:0}
.done{border:1px solid var(--accent);background:var(--accent-soft);border-radius:12px;padding:18px;display:grid;gap:14px}
.done h3{margin:0;font-family:var(--display);font-size:20px}
.done p{margin:0}
.done textarea{font-family:var(--mono);font-size:12.5px;min-height:220px}
.contactrow{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.contactrow code{font-family:var(--mono);background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:6px 10px;user-select:all}
.muted{color:var(--muted);font-size:14px}

/* Mobile Leiste */
.mbar{display:none}
@media (max-width:980px){
  .mbar{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:5;background:var(--surface);border-top:1px solid var(--line);padding:10px 16px calc(10px + env(safe-area-inset-bottom,0px));gap:12px;align-items:center;justify-content:space-between;box-shadow:0 -6px 20px rgba(0,0,0,.08)}
  .mbar div{font-size:12.5px;color:var(--muted);line-height:1.25}
  .mbar b{display:block;font-family:var(--mono);font-size:13.5px;color:var(--ink);white-space:nowrap}
}

/* Rechtstexte */
.legal{max-width:760px;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:clamp(20px,4vw,40px);margin-block:12px 40px}
.legal h1{font-family:var(--display);font-size:clamp(28px,4vw,38px);letter-spacing:-.02em;margin:0 0 18px}
.legal h2{font-size:19px;margin:28px 0 8px}
.legal h3{font-size:16px;margin:18px 0 6px}
.legal p,.legal li{color:var(--ink)}
.legal .muted{margin-top:28px}

/* Fuß */
footer.site{border-top:1px solid var(--line);margin-top:30px;padding-block:24px 0;display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;color:var(--muted);font-size:14px}
footer.site nav{display:flex;gap:18px;flex-wrap:wrap}
footer.site a{color:var(--muted)}