@font-face{font-family:Nunito;src:url(../fonts/nunito.woff2) format("woff2");font-weight:200 1000;font-display:swap}
@font-face{font-family:Fraunces;src:url(../fonts/fraunces.woff2) format("woff2");font-weight:100 900;font-display:swap}

:root{
  --teal:#0f5257; --teal-2:#177a80; --teal-soft:#dcefee;
  --yellow:#f6c343; --yellow-soft:#fdf1cc;
  --coral:#ec7357; --coral-soft:#fde3db;
  --green:#3f9a5b; --green-soft:#dff1e4;
  --ink:#13292b; --muted:#5b6f70; --line:#e6e0d3;
  --bg:#fbf7ef; --card:#fff;
  --radius:18px; --shadow:0 1px 2px rgb(19 41 43/.06),0 8px 24px rgb(19 41 43/.07);
  --font:Nunito,system-ui,-apple-system,"Segoe UI",sans-serif;
  --display:Fraunces,Georgia,serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font:400 17px/1.6 var(--font);color:var(--ink);background:var(--bg);overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:var(--teal-2)}
h1,h2,h3{font-family:var(--display);line-height:1.15;letter-spacing:-.01em;margin:0 0 .5em;font-weight:800}
h1{font-size:clamp(2rem,4.5vw,3.2rem)}
h2{font-size:clamp(1.5rem,3vw,2rem)}
h3{font-size:1.25rem}
p{margin:0 0 1em}
.wrap{width:100%;max-width:1160px;margin:0 auto;padding:0 20px}
.section{padding:56px 20px}
.mt{margin-top:32px}
.center{text-align:center}
.muted{color:var(--muted)}
.lead{font-size:1.15rem;color:var(--muted)}
.skip{position:absolute;left:-9999px}.skip:focus{left:12px;top:12px;z-index:99;background:#fff;padding:8px 12px;border-radius:8px}
:focus-visible{outline:3px solid var(--yellow);outline-offset:2px}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:700 1rem/1 var(--font);padding:14px 22px;border-radius:999px;border:2px solid transparent;cursor:pointer;text-decoration:none;transition:transform .15s,background .15s,box-shadow .15s}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:none}
.btn-primary{background:var(--teal);color:#fff}
.btn-primary:hover{background:var(--teal-2);box-shadow:0 6px 18px rgb(15 82 87/.25)}
.btn-yellow{background:var(--yellow);color:var(--ink)}
.btn-ghost{background:transparent;border-color:var(--teal);color:var(--teal)}
.btn-ghost:hover{background:var(--teal-soft)}
.btn-lg{padding:17px 28px;font-size:1.08rem}
.btn-small{padding:10px 16px;font-size:.92rem}
.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgb(251 247 239/.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font:700 1.2rem var(--display)}
.brand b{color:var(--coral)}
.brand img{border-radius:10px}
.mainnav{display:flex;align-items:center;gap:6px}
.mainnav a:not(.btn){padding:8px 14px;border-radius:999px;text-decoration:none;color:var(--ink);font-weight:700}
.mainnav a:not(.btn):hover{background:var(--teal-soft)}
.mainnav a[aria-current=page]{background:var(--teal);color:#fff}
.mainnav .btn{margin-left:8px}
.nav-toggle{display:none;background:none;border:0;width:44px;height:44px;cursor:pointer;padding:10px}
.nav-toggle span{display:block;height:2px;background:var(--ink);margin:5px 0;border-radius:2px;transition:.2s}
@media (max-width:860px){
  .nav-toggle{display:block}
  .mainnav{position:absolute;top:68px;left:0;right:0;flex-direction:column;align-items:stretch;background:var(--bg);padding:12px 20px 20px;border-bottom:1px solid var(--line);display:none}
  .mainnav.open{display:flex}
  .mainnav .btn{margin:8px 0 0}
  .nav-toggle[aria-expanded=true] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav-toggle[aria-expanded=true] span:nth-child(2){opacity:0}
  .nav-toggle[aria-expanded=true] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
}

/* Hero */
.hero{position:relative;min-height:min(78vh,720px);display:flex;align-items:center;overflow:hidden}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:70% center}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgb(251 247 239/.55),rgb(251 247 239/0) 60%)}
.hero-inner{position:relative;z-index:1;padding-top:48px;padding-bottom:48px}
.hero-card{max-width:560px;background:rgb(255 255 255/.92);backdrop-filter:blur(6px);padding:36px;border-radius:28px;box-shadow:var(--shadow)}
.eyebrow{display:inline-block;background:var(--yellow-soft);color:#8a6500;font-weight:800;font-size:.85rem;text-transform:uppercase;letter-spacing:.08em;padding:6px 12px;border-radius:999px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0}
.hero-stats{display:flex;gap:28px;list-style:none;margin:0;padding:20px 0 0;border-top:1px solid var(--line)}
.hero-stats b{display:block;font:800 1.6rem var(--display);color:var(--teal)}
.hero-stats span{font-size:.9rem;color:var(--muted)}
@media (max-width:640px){
  .hero{align-items:flex-end;min-height:auto;padding-top:220px}
  .hero-bg{height:280px;bottom:auto}
  .hero::after{display:none}
  .hero-card{padding:24px;border-radius:22px}
  .hero-inner{padding:0 16px 24px}
  .hero-stats{gap:18px}
}

/* Sections */
.section-head{max-width:640px;margin-bottom:28px}
.section-head p{color:var(--muted)}
.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}
.steps li{background:var(--card);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}
.step-n{display:grid;place-items:center;width:44px;height:44px;border-radius:14px;background:var(--yellow);font:800 1.3rem var(--display);margin-bottom:14px}
.steps p{color:var(--muted);margin:0}

.topic-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:22px}
.topic-card{background:var(--card);border-radius:var(--radius);overflow:hidden;text-decoration:none;color:inherit;box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s;display:flex;flex-direction:column}
.topic-card:hover{transform:translateY(-4px);box-shadow:0 14px 34px rgb(19 41 43/.13)}
.topic-card img{aspect-ratio:4/3;object-fit:cover;width:100%}
.topic-body{padding:20px 22px 22px}
.topic-body h2,.topic-body h3{font-size:1.3rem;margin-bottom:.3em}
.topic-body p{color:var(--muted);font-size:.95rem}
.progress{height:8px;background:var(--teal-soft);border-radius:99px;overflow:hidden}
.progress span{display:block;height:100%;background:linear-gradient(90deg,var(--teal-2),var(--green));border-radius:99px;transition:width .6s}
.progress-label{display:block;margin-top:6px;color:var(--muted);font-weight:600}

.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.split img{border-radius:24px}
@media (max-width:820px){.split{grid-template-columns:1fr;gap:24px}}
.checks{list-style:none;padding:0;margin:0 0 24px}
.checks li{position:relative;padding-left:32px;margin-bottom:10px}
.checks li::before{content:"✓";position:absolute;left:0;top:1px;width:22px;height:22px;border-radius:50%;background:var(--green-soft);color:var(--green);display:grid;place-items:center;font-weight:800;font-size:.8rem}

.cta-band{display:grid;grid-template-columns:320px 1fr;align-items:center;gap:32px;background:var(--teal);color:#fff;border-radius:28px;padding:28px 40px 28px 28px;overflow:hidden}
.cta-band img{border-radius:20px}
.cta-band p{color:#cfe6e5}
@media (max-width:760px){.cta-band{grid-template-columns:1fr;padding:22px;text-align:center}}

.page-head{background:linear-gradient(180deg,var(--teal-soft),var(--bg));padding:48px 0 24px}

/* Topic page */
.topic-hero{background:linear-gradient(180deg,var(--teal-soft),var(--bg));padding:32px 0}
.topic-hero-inner{display:grid;grid-template-columns:1.1fr 1fr;gap:40px;align-items:center}
.topic-hero img{border-radius:24px;box-shadow:var(--shadow)}
.back{display:inline-block;margin-bottom:12px;font-weight:700;text-decoration:none}
@media (max-width:820px){.topic-hero-inner{grid-template-columns:1fr}.topic-hero img{order:-1}}
.lesson{max-width:780px;padding-top:40px;padding-bottom:16px}
.lesson h2{margin-top:1.6em;font-size:1.6rem}
.lesson ul,.lesson ol{padding-left:1.2em}
.lesson li{margin-bottom:.4em}
.formeln{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px;margin:16px 0 20px}
.formel{background:var(--card);border-radius:16px;padding:18px;box-shadow:var(--shadow);border-top:4px solid var(--yellow)}
.formel span{display:block;font-size:.85rem;color:var(--muted);font-weight:700;text-transform:uppercase;letter-spacing:.05em}
.formel b{display:block;font:800 1.2rem var(--display);margin:4px 0}
.formel small{color:var(--teal-2);font-weight:700}
.rechner{background:var(--yellow-soft);border-radius:18px;padding:22px;margin:20px 0}
.rechner label{font-weight:800;display:block;margin-bottom:10px}
.rechner input{width:100%;accent-color:var(--teal)}
.rechner-bar{display:flex;height:22px;border-radius:99px;overflow:hidden;margin:14px 0 10px;background:#fff}
.rechner-bar span{width:var(--w);transition:width .3s}
.rechner-bar .r{background:var(--yellow)}.rechner-bar .b{background:var(--coral)}
.rechner-txt{margin:0}
.rechner-txt b[data-r]{color:#8a6500}.rechner-txt b[data-b]{color:var(--coral)}
.tab{width:100%;border-collapse:collapse;background:var(--card);border-radius:14px;overflow:hidden;box-shadow:var(--shadow)}
.tab th,.tab td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--line)}
.tab th{background:var(--teal);color:#fff}
.rang{list-style:none;counter-reset:r;padding:0!important}
.rang li{counter-increment:r;background:var(--card);border-radius:14px;padding:12px 16px 12px 56px;position:relative;box-shadow:var(--shadow);margin-bottom:10px}
.rang li::before{content:counter(r);position:absolute;left:14px;top:50%;transform:translateY(-50%);width:30px;height:30px;border-radius:10px;background:var(--yellow);display:grid;place-items:center;font-weight:800}
.gruppen{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px}
.gruppen div{background:var(--card);border-radius:16px;padding:18px;box-shadow:var(--shadow)}
.gruppen p{margin:6px 0 0;font-size:.95rem;color:var(--muted)}
.legal .todo{background:var(--yellow-soft);border-left:4px solid var(--yellow);padding:10px 14px;border-radius:8px}

/* Quiz */
.quiz-host{max-width:780px}
.quiz-card{background:var(--card);border-radius:24px;padding:28px;box-shadow:var(--shadow)}
.quiz-top{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:12px;color:var(--muted);font-weight:700;font-size:.92rem}
.pts{background:var(--coral-soft);color:#a3402a;padding:4px 10px;border-radius:999px;font-size:.82rem}
.quiz-q{font:700 1.3rem/1.35 var(--display);margin:6px 0 18px}
.answers{display:grid;gap:10px}
.ans{display:flex;gap:14px;align-items:flex-start;padding:14px 16px;border:2px solid var(--line);border-radius:14px;cursor:pointer;transition:border-color .15s,background .15s;background:#fff;text-align:left;font:inherit;color:inherit;width:100%}
.ans:hover{border-color:var(--teal-2)}
.ans .box{flex:0 0 24px;height:24px;border:2px solid var(--muted);border-radius:7px;display:grid;place-items:center;margin-top:1px;transition:.15s}
.ans[aria-pressed=true]{border-color:var(--teal);background:var(--teal-soft)}
.ans[aria-pressed=true] .box{background:var(--teal);border-color:var(--teal)}
.ans[aria-pressed=true] .box::after{content:"✓";color:#fff;font-weight:900;font-size:.85rem}
.ans.ok{border-color:var(--green);background:var(--green-soft)}
.ans.bad{border-color:var(--coral);background:var(--coral-soft)}
.ans.miss{border-style:dashed;border-color:var(--green)}
.ans[disabled]{cursor:default}
.feedback{margin-top:16px;padding:16px 18px;border-radius:14px;display:none}
.feedback.show{display:block}
.feedback.ok{background:var(--green-soft)}.feedback.bad{background:var(--coral-soft)}
.feedback b{display:block;margin-bottom:4px}
.quiz-actions{display:flex;justify-content:space-between;gap:10px;margin-top:20px;flex-wrap:wrap}
.quiz-bar{height:6px;background:var(--teal-soft);border-radius:99px;margin-bottom:18px;overflow:hidden}
.quiz-bar span{display:block;height:100%;background:var(--teal);transition:width .3s}
.quiz-done{text-align:center}
.quiz-done img{width:160px;margin:0 auto 10px}
.big-score{font:800 3rem var(--display);color:var(--teal)}

/* Exam */
.exam-intro{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.exam-intro img{border-radius:24px}
@media (max-width:820px){.exam-intro{grid-template-columns:1fr}.exam-intro img{display:none}}
.exam-head{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:16px}
.timer{font:800 1.3rem var(--display);background:var(--card);padding:8px 16px;border-radius:12px;box-shadow:var(--shadow)}
.timer.warn{color:var(--coral)}
.exam-nav{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:18px}
.exam-nav button{width:36px;height:36px;border-radius:10px;border:2px solid var(--line);background:#fff;font:700 .85rem var(--font);cursor:pointer;color:var(--ink)}
.exam-nav button.done{background:var(--teal-soft);border-color:var(--teal-soft)}
.exam-nav button.cur{border-color:var(--teal)}
.exam-nav button.flag{box-shadow:inset 0 -4px 0 var(--yellow)}
.result{text-align:center;padding:32px;border-radius:24px;margin-bottom:24px}
.result.pass{background:var(--green-soft)}.result.fail{background:var(--coral-soft)}
.result img{width:220px;margin:0 auto 12px;border-radius:18px}
.review-item{background:var(--card);border-radius:16px;padding:18px 20px;margin-bottom:12px;box-shadow:var(--shadow);border-left:5px solid var(--coral)}
.review-item.ok{border-left-color:var(--green)}
.review-item ul{margin:8px 0;padding-left:1.2em}
.review-item .r{color:var(--green);font-weight:700}
.review-item .w{color:#a3402a;text-decoration:line-through}

/* Signs */
.tabs{display:inline-flex;background:#fff;border-radius:999px;padding:4px;box-shadow:var(--shadow);margin-top:8px}
.tabs button{border:0;background:none;padding:10px 20px;border-radius:999px;font:700 1rem var(--font);cursor:pointer;color:var(--ink)}
.tabs button[aria-selected=true]{background:var(--teal);color:#fff}
.filter{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}
.chip{border:2px solid var(--line);background:#fff;padding:8px 14px;border-radius:999px;font:700 .9rem var(--font);cursor:pointer;color:var(--ink)}
.chip.is-active{background:var(--ink);color:#fff;border-color:var(--ink)}
.sign-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:14px}
.sign{margin:0;background:var(--card);border-radius:18px;padding:18px;box-shadow:var(--shadow);text-align:center}
.sign img,.sign svg{width:96px;height:96px;object-fit:contain;margin:0 auto 10px;display:block}
.sign b{display:block;line-height:1.3}
.sign small{color:var(--muted);display:block;margin-top:4px;line-height:1.4}
.flash{max-width:520px;margin:0 auto;text-align:center}
.flash-card{background:var(--card);border-radius:24px;padding:32px;box-shadow:var(--shadow)}
.flash-card img,.flash-card svg{width:170px;height:170px;object-fit:contain;margin:0 auto 18px;display:block}
.flash-opts{display:grid;gap:10px;margin-top:10px}

/* Progress page */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px}
.stat{background:var(--card);border-radius:18px;padding:22px;box-shadow:var(--shadow)}
.stat b{display:block;font:800 2.2rem var(--display);color:var(--teal)}
.stat span{color:var(--muted);font-weight:600}
.topic-list{display:grid;gap:12px}
.topic-row{display:grid;grid-template-columns:96px 1fr;gap:16px;align-items:center;background:var(--card);padding:12px;border-radius:16px;box-shadow:var(--shadow);text-decoration:none;color:inherit}
.topic-row img{border-radius:10px;aspect-ratio:4/3;object-fit:cover}
.topic-row b{display:block;margin-bottom:6px}
.hist{width:100%;border-collapse:collapse;background:var(--card);border-radius:14px;overflow:hidden;box-shadow:var(--shadow)}
.hist td,.hist th{padding:10px 14px;border-bottom:1px solid var(--line);text-align:left}
.tag{padding:3px 10px;border-radius:99px;font-weight:700;font-size:.85rem}
.tag.pass{background:var(--green-soft);color:var(--green)}.tag.fail{background:var(--coral-soft);color:#a3402a}

.notfound img{width:180px;margin:0 auto 16px}

/* Footer */
.site-footer{background:var(--ink);color:#c8d6d6;margin-top:40px;padding:48px 0 24px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px}
.footer-grid h3{color:#fff;font-size:1rem;font-family:var(--font)}
.footer-grid nav a{display:block;color:#c8d6d6;text-decoration:none;margin-bottom:6px}
.footer-grid nav a:hover{color:var(--yellow)}
.brand-light{color:#fff;margin-bottom:12px}
.footer-note{border-top:1px solid #2c4446;margin-top:32px;padding-top:20px;font-size:.85rem;color:#8fa6a6}
@media (max-width:700px){.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div{grid-column:1/-1}}

@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

/* Anzeigen */
.section-tight{padding-top:8px;padding-bottom:24px}
.ads{background:var(--card);border-radius:24px;padding:24px;box-shadow:var(--shadow)}
.ads-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px}
.ads-head h2{margin:0;font-size:1.35rem}
.ad-label{font-size:.75rem;font-weight:800;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);border:1px solid var(--line);padding:3px 8px;border-radius:6px}
.ads-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:14px}
.ad-card{display:grid;grid-template-columns:84px 1fr;gap:14px;align-items:center;padding:12px;border:2px solid var(--line);border-radius:16px;text-decoration:none;color:inherit;transition:border-color .15s,transform .15s}
.ad-card:hover{border-color:var(--yellow);transform:translateY(-2px)}
.ad-card img{border-radius:12px;background:var(--bg)}
.ad-card b{display:block;line-height:1.3;margin-bottom:4px}
.ad-card p{font-size:.88rem;color:var(--muted);margin:0 0 6px;line-height:1.45}
.ad-cta{font-size:.88rem;font-weight:800;color:var(--teal-2)}
.ads-note{font-size:.78rem;color:var(--muted);margin:14px 0 0}
.ad-price{display:inline-block;background:var(--yellow-soft);color:var(--ink);padding:2px 8px;border-radius:8px;margin-right:4px}

/* SEO-Inhalte */
.sign-t{font:700 1rem/1.3 var(--font);margin:0;letter-spacing:0}
.seo-text{max-width:820px}
.seo-text p{color:var(--muted)}
.qa-list{display:grid;gap:10px;max-width:860px}
.qa{background:var(--card);border-radius:14px;box-shadow:var(--shadow);padding:0 18px}
.qa summary{display:grid;grid-template-columns:30px 1fr auto;gap:12px;align-items:center;padding:14px 0;cursor:pointer;font-weight:700;list-style:none}
.qa summary::-webkit-details-marker{display:none}
.qa-n{width:28px;height:28px;border-radius:9px;background:var(--teal-soft);display:grid;place-items:center;font-size:.85rem}
.qa[open] summary{border-bottom:1px solid var(--line)}
.qa ul{list-style:none;padding:12px 0 0;margin:0}
.qa li{margin-bottom:6px}
.qa li.r{color:var(--green);font-weight:700}
.qa li.w{color:var(--muted)}
.qa p{margin:10px 0 16px;font-size:.95rem}
.faq{max-width:860px}
.faq .qa summary{grid-template-columns:1fr auto}
.faq .qa summary::after{content:"+";font-size:1.3rem;color:var(--teal)}
.faq .qa[open] summary::after{content:"–"}

/* Verkehrszeichen-Detailseiten */
.sign-link{text-decoration:none;color:inherit;transition:transform .15s,box-shadow .15s}
.sign-link:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgb(19 41 43/.12)}
.sign-link b{display:block;line-height:1.3}
.sign-more{display:block;margin-top:8px;font-size:.85rem;font-weight:800;color:var(--teal-2)}
.sign-hero{display:grid;grid-template-columns:220px 1fr;gap:40px;align-items:center}
.sign-hero img{width:220px;height:220px;object-fit:contain;filter:drop-shadow(0 8px 18px rgb(19 41 43/.15))}
@media (max-width:640px){.sign-hero{grid-template-columns:1fr;gap:16px}.sign-hero img{width:150px;height:150px}}
.tipp{background:var(--yellow-soft);border-left:5px solid var(--yellow);border-radius:14px;padding:16px 20px;margin:24px 0}
.tipp p{margin:6px 0 0}
.pager{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-top:28px}
.article-head{max-width:820px}
.article-img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:22px;margin:0 0 28px;box-shadow:var(--shadow)}
.small{font-size:.9rem}
@media (max-width:1000px) and (min-width:861px){.mainnav a:not(.btn){padding:8px 10px}}
.q-sign{display:block;width:120px;height:120px;object-fit:contain;margin:4px 0 10px}
.q-sign-sm{width:80px;height:80px;margin:12px 0 0}

/* Lange deutsche Wörter (z. B. „Mindestgeschwindigkeit“) auf schmalen Bildschirmen umbrechen */
h1,h2,h3,.sign b,.sign small,.sign-t,.tab th,.tab td,.qa summary,.ad-card b,.topic-body h2,.topic-body h3{overflow-wrap:break-word;hyphens:auto;-webkit-hyphens:auto}
.sign-hero>div,.topic-hero-inner>div,.split>div{min-width:0}
@media (max-width:500px){.tab th,.tab td{padding:10px 12px}}