/* kapitel/selbsttest.css — vollstaendiges Stylesheet dieses Seitentyps.
   Diese Seite gibt es genau einmal je Kapitel, deshalb ist die Leitvorlage
   mathematik/klasse-8/vielecke-prismen/selbsttest/index.html
   uebernommen worden (Stand 2026-09-08), unveraendert und in Originalreihenfolge.
   Fachfarben kommen aus kapitel/fach.css, das DANACH geladen wird. */
:root{--bg:#f4ede0;--bg-soft:#faf6ee;--bg-dark:#3d342b;--ink:#1a1612;--ink-soft:#5b4f43;--rule:#c9bb9a;--mathe:#d6e4f5;--mathe-deep:#a8c5e3;--mathe-strong:#3a5a8c;--mathe-ink:#15294a;--info-orange:#b86a2c;--safe:#4a7530;--danger:#b32d2d}
*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:Inter,sans-serif;font-size:17px;line-height:1.65;-webkit-font-smoothing:antialiased}
h1,h2,h3{font-family:'Fredoka',sans-serif;font-weight:500;letter-spacing:-0.01em;line-height:1.1}
em{font-style:normal}a{color:inherit;text-decoration:none}
.container{max-width:1180px;margin:0 auto;padding:0 32px}
*:focus-visible{outline:3px solid var(--mathe-strong);outline-offset:2px;border-radius:4px}
button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid var(--mathe-strong);outline-offset:2px}
.skip-link{position:absolute;top:-40px;left:8px;background:var(--mathe-ink);color:#fff;padding:8px 16px;border-radius:6px;z-index:100;font-size:14px}
.skip-link:focus{top:8px}

header{position:sticky;top:0;z-index:50;background:rgba(244,237,224,0.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--rule)}
header .bar{display:flex;align-items:center;justify-content:space-between;padding:22px 0}
  .brand-img { height: 28px; width: auto; display: block; object-fit: contain; }
  @media (max-width: 560px) { .brand-img { height: 24px; } }

.brand{}
nav ul{display:flex;gap:36px;list-style:none;font-size:15px;align-items:center}
nav a{color:var(--ink-soft);transition:color .2s}nav a:hover{color:var(--ink)}nav a.active{color:var(--mathe-strong);font-weight:500}
nav .nav-sep{width:1px;height:18px;background:var(--rule);align-self:center;margin:0 4px}
.topic-hero{position:relative;padding:48px 0 36px;background-color:var(--mathe-strong);color:#fff}
.breadcrumb{font-size:13px;color:rgba(255,255,255,0.85);margin-bottom:18px}.breadcrumb a{color:rgba(255,255,255,0.85);text-decoration:none}.breadcrumb a:hover{color:#fff}.breadcrumb .sep{margin:0 8px;opacity:0.6}
.topic-hero h1{font-size:clamp(32px,4.4vw,50px);color:#fff;margin-bottom:10px}
.topic-hero .subtitle{font-size:16px;color:rgba(255,255,255,0.9);max-width:760px;line-height:1.55}

.panel{padding:40px 0 80px}

.lernziele{background:linear-gradient(135deg,#fff 0%,var(--mathe) 100%);border:2px solid var(--mathe-strong);border-radius:16px;padding:24px 30px;margin-bottom:28px;box-shadow:0 10px 30px rgba(74,111,165,0.15)}
.lernziele h2{font-size:22px;color:var(--mathe-ink);margin-bottom:10px;display:flex;align-items:center;gap:10px}
.lernziele p{font-size:15px;line-height:1.65;color:var(--ink)}

.progress-sticky{position:sticky;top:78px;background:#fff;border:1px solid var(--rule);border-radius:12px;padding:12px 18px;margin-bottom:24px;display:flex;align-items:center;gap:14px;font-size:13px;color:var(--ink);z-index:5;box-shadow:0 2px 10px rgba(0,0,0,0.05)}
.progress-bar-wrap{flex:1;height:8px;background:var(--bg-soft);border-radius:999px;overflow:hidden}
.progress-bar-fill{height:100%;background:linear-gradient(90deg,var(--mathe-strong) 0%,var(--safe) 100%);width:0%;transition:width .4s}
.progress-text{font-weight:700;color:var(--mathe-ink);font-size:13px}

.section-head{display:flex;align-items:center;gap:14px;margin:32px 0 18px;padding-bottom:12px;border-bottom:2px solid var(--rule)}
.section-head .badge{flex-shrink:0;font-size:11px;background:var(--mathe);color:var(--mathe-ink);padding:5px 12px;border-radius:999px;font-weight:700;letter-spacing:0.05em;text-transform:uppercase}
.section-head h2{font-size:clamp(22px,2.8vw,28px);color:var(--mathe-ink)}

/* --- Themen-Abschnitte im Selbsttest --- */
.test-thema{margin:0 0 46px;scroll-margin-top:150px}
.test-thema:last-of-type{margin-bottom:30px}
.thema-head{display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding:0 0 14px;margin-bottom:20px;border-bottom:2px solid var(--mathe-deep)}
.thema-head h2{font-size:26px;color:var(--mathe-ink);margin:0;flex:1 1 auto;min-width:0}
.thema-head h2 em{font-style:normal;color:var(--mathe-strong)}
.thema-num{display:inline-block;font-size:11px;letter-spacing:.1em;text-transform:uppercase;font-weight:700;color:#fff;background:var(--mathe-strong);padding:5px 13px;border-radius:999px;white-space:nowrap}
.thema-count{font-size:12px;font-weight:600;color:var(--mathe-strong);background:var(--mathe);border:1px solid var(--mathe-deep);padding:4px 11px;border-radius:999px;white-space:nowrap}
.test-thema .vw-question{border-left:4px solid var(--mathe-deep)}
.test-thema .vw-question.answered{border-left-color:var(--mathe-strong)}
@media(max-width:560px){.thema-head h2{font-size:21px;flex-basis:100%;order:3}}
@media print{.test-thema{page-break-inside:auto}.thema-head{border-bottom:1px solid #999}}
.vw-question{background:var(--bg-soft);border:1px solid var(--rule);border-radius:12px;padding:18px 22px;margin-bottom:12px;transition:all .25s}
.vw-question.answered{border-color:var(--mathe-deep);background:#fff}
.vw-question .q{font-size:16px;font-weight:500;margin-bottom:12px;line-height:1.55}
.vw-options{display:flex;flex-wrap:wrap;gap:8px}
.vw-opt{background:#fff;border:1.5px solid var(--rule);padding:10px 16px;border-radius:999px;cursor:pointer;font-size:14px;transition:all .15s;font-family:Inter;min-height:40px}
.vw-opt:hover:not(:disabled){border-color:var(--info-orange);transform:translateY(-1px)}
.vw-opt:disabled{cursor:default}
.vw-opt.correct{background:var(--safe);border-color:var(--safe);color:#fff}
.vw-opt.wrong{background:#ffd5d5;border-color:var(--danger);color:#5a1414}
.vw-opt.reveal-correct{border-color:var(--safe);box-shadow:0 0 0 2px rgba(74,117,48,0.4)}
.vw-feedback{display:none;margin-top:10px;font-size:14px;padding:10px 14px;border-radius:8px;line-height:1.5}
.vw-feedback.show{display:block}
.vw-feedback.ok{background:#d8e8c4;color:#2e5e1f}
.vw-feedback.warn{background:#fce8d8;color:#5a3210}

.check-btn{padding:14px 28px;background:var(--mathe-strong);color:#fff;border:0;border-radius:999px;font:inherit;font-size:16px;font-weight:600;cursor:pointer;transition:all .15s;min-height:48px}
.check-btn:hover:not(:disabled){background:var(--mathe-ink);transform:translateY(-1px);box-shadow:0 6px 14px rgba(74,111,165,0.25)}
.check-btn:disabled{opacity:0.45;cursor:not-allowed;transform:none}

.auswerten-wrap{margin:32px 0;text-align:center;padding:24px;background:linear-gradient(135deg,#fff 0%,var(--bg-soft) 100%);border:1.5px solid var(--rule);border-radius:14px}
.auswerten-wrap .info{font-size:13px;color:var(--ink-soft);margin-top:10px}

.auswertung{display:none;margin-top:32px;background:linear-gradient(135deg,#fff 0%,#fafaff 100%);border:2px solid var(--mathe-strong);border-radius:16px;padding:30px 32px;box-shadow:0 10px 30px rgba(74,111,165,0.18)}
.auswertung.show{display:block}
.auswertung h2{font-size:28px;color:var(--mathe-ink);margin-bottom:8px}
.auswertung .gesamt{font-size:15px;color:var(--ink-soft);margin-bottom:24px;line-height:1.6}
.auswertung .gesamt strong{color:var(--mathe-ink);font-weight:600}
.gesamt-score{display:inline-flex;align-items:baseline;gap:6px;padding:8px 18px;border-radius:999px;background:var(--mathe);color:var(--mathe-ink);font-weight:700;font-size:18px;margin-right:10px}
.gesamt-score .small{font-size:13px;font-weight:500;opacity:0.75}

.topic-list{display:flex;flex-direction:column;gap:10px;margin-top:10px}
.topic-result{display:grid;grid-template-columns:180px 80px 1fr auto;gap:14px;align-items:center;padding:14px 18px;border-radius:12px;border:1.5px solid var(--rule);background:#fff;transition:all .2s}
.topic-result:hover{transform:translateX(2px);box-shadow:0 4px 12px rgba(0,0,0,0.05)}
.topic-result.good{border-color:var(--safe);background:linear-gradient(90deg,#f4faec 0%,#fff 60%)}
.topic-result.mid{border-color:var(--info-orange);background:linear-gradient(90deg,#fdf5eb 0%,#fff 60%)}
.topic-result.weak{border-color:var(--danger);background:linear-gradient(90deg,#fde5e5 0%,#fff 60%)}
.topic-name{font-weight:600;color:var(--mathe-ink);font-size:15px}
.topic-score{font-family:inherit;font-size:22px;color:var(--mathe-ink);text-align:center;font-weight:600}
.topic-bar-wrap{height:10px;background:var(--bg-soft);border-radius:999px;overflow:hidden;border:1px solid var(--rule)}
.topic-bar-fill{height:100%;border-radius:999px;transition:width .8s ease-out}
.topic-bar-fill.good{background:linear-gradient(90deg,#7fb35a 0%,var(--safe) 100%)}
.topic-bar-fill.mid{background:linear-gradient(90deg,#e89b5a 0%,var(--info-orange) 100%)}
.topic-bar-fill.weak{background:linear-gradient(90deg,#d96868 0%,var(--danger) 100%)}
.topic-link{padding:8px 16px;background:#fff;border:1.5px solid var(--mathe-strong);color:var(--mathe-strong);border-radius:999px;font-size:13px;font-weight:600;white-space:nowrap;transition:all .15s;display:inline-flex;align-items:center;gap:4px;min-height:36px}
.topic-link:hover{background:var(--mathe-strong);color:#fff;transform:translateY(-1px)}
.topic-result.good .topic-link{border-color:var(--safe);color:var(--safe)}
.topic-result.good .topic-link:hover{background:var(--safe);color:#fff}
.topic-result.mid .topic-link{border-color:var(--info-orange);color:#6b3a14}
.topic-result.mid .topic-link:hover{background:var(--info-orange);color:#fff}
.topic-result.weak .topic-link{border-color:var(--danger);color:var(--danger)}
.topic-result.weak .topic-link:hover{background:var(--danger);color:#fff}
@media(max-width:700px){
  .topic-result{grid-template-columns:1fr auto;gap:8px}
  .topic-score{grid-column:2;text-align:right}
  .topic-bar-wrap{grid-column:1/-1}
  .topic-link{grid-column:1/-1;justify-self:start}
}

.empfehlung{margin-top:24px;padding:18px 22px;background:#fff;border-radius:12px;border-left:4px solid var(--mathe-strong);font-size:15px;line-height:1.65}
.empfehlung strong{color:var(--mathe-ink)}
.empfehlung.good{border-left-color:var(--safe);background:linear-gradient(135deg,#f4faec 0%,#fff 100%)}
.empfehlung.weak{border-left-color:var(--danger);background:linear-gradient(135deg,#fde5e5 0%,#fff 100%)}

.legende{display:flex;gap:18px;flex-wrap:wrap;margin-top:20px;font-size:13px;color:var(--ink-soft);padding-top:18px;border-top:1px dashed var(--rule)}
.legende span{display:inline-flex;align-items:center;gap:6px}
.legende .dot{width:14px;height:14px;border-radius:50%;display:inline-block}
.legende .dot.good{background:var(--safe)}
.legende .dot.mid{background:var(--info-orange)}
.legende .dot.weak{background:var(--danger)}

.reset-btn{margin-top:18px;padding:10px 22px;background:#fff;color:var(--ink-soft);border:1.5px solid var(--rule);border-radius:999px;font:inherit;font-size:13px;font-weight:600;cursor:pointer;transition:all .15s}
.reset-btn:hover{background:var(--bg-soft);color:var(--ink);border-color:var(--ink-soft)}

footer{background:var(--bg-dark);color:#d6c8a8;padding:60px 0 40px;font-size:14px}
footer .row{display:flex;justify-content:space-between;flex-wrap:wrap;gap:20px}
footer .links{display:flex;gap:28px}footer a:hover{color:#fff}

@media print{
  nav,header,.progress-sticky,.skip-link,footer,.check-btn,.reset-btn{display:none !important}
  body{background:#fff;color:#000;font-size:11pt}
  .panel{padding:0}
  .vw-question{page-break-inside:avoid;border:1px solid #ccc;background:#fff}
  .topic-hero{background:none;color:#000;padding:0 0 12pt;border-bottom:2px solid #000}
  .topic-hero h1,.topic-hero .subtitle{color:#000}
  a{color:#000;text-decoration:underline}
}

@media(max-width:560px){nav{display:none}.container{padding:0 22px}.vw-question .q{font-size:15px}}
/* === PREMIUM EDITORIAL — SUB-CHAPTER LAYER === */
.topic-hero{padding:84px 0 64px;}
.topic-hero h1{font-size:clamp(44px,5.6vw,68px);letter-spacing:-0.015em;line-height:1.04;margin-bottom:14px}
.topic-hero h1 em{font-style:normal}
.topic-hero .subtitle, .topic-hero .untertitel{font-size:17px;line-height:1.7;color:rgba(255,255,255,0.92);max-width:62ch}

.panel{padding:64px 0 100px}

.lernziele{
  background:transparent;
  border:none;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);
  border-radius:0;
  padding:32px 0;margin-bottom:48px;box-shadow:none;
  display:grid;grid-template-columns:200px 1fr;gap:36px;align-items:start;
}
.lernziele::before{
  content:'Lernziele';
  font-family:Inter,sans-serif;font-size:11px;font-weight:600;
  letter-spacing:0.22em;text-transform:uppercase;
  color:var(--ink-soft);
  padding-top:6px;
}
.lernziele h2{display:none}
.lernziele ul{margin:0}
.lernziele li{font-size:17px;line-height:1.5;color:var(--ink)}
.lernziele li::before{content:'';display:inline-block;width:8px;height:8px;background:var(--safe);border-radius:50%;margin-right:14px;margin-top:8px;flex-shrink:0}
@media(max-width:720px){.lernziele{grid-template-columns:1fr;gap:14px}.lernziele::before{padding-top:0}}

.vorwissen{
  background:#fff;border:1px solid var(--rule);border-left:3px solid var(--info-orange);
  border-radius:0;box-shadow:none;
  padding:28px 32px;margin-bottom:48px;
}
.vorwissen h2{
  font-family:'Fredoka',sans-serif;font-style:normal;font-weight:500;
  font-size:28px;color:var(--mathe-ink);margin-bottom:8px;
}
.vorwissen .vw-intro{font-size:15px;color:var(--ink-soft);margin-bottom:22px}

.toc{background:transparent;border:none;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);border-radius:0;padding:24px 0;margin-bottom:56px;max-width:none}
.toc-label{margin-bottom:18px;letter-spacing:0.22em}
.toc-list a{padding:10px 0;border-radius:0;border-bottom:1px dashed transparent}
.toc-list a:hover{background:transparent;transform:translateX(4px);border-bottom-color:var(--rule)}
.toc-list .toc-num{
  width:auto;height:auto;background:transparent;border:none;
  font-family:inherit;font-style:normal;font-weight:500;
  font-size:22px;color:var(--mathe-strong);box-shadow:none;
}

.phase{margin-bottom:80px}
.phase-head{
  display:grid;grid-template-columns:120px 1fr;gap:32px;align-items:baseline;
  padding-bottom:24px;margin-bottom:32px;border-bottom:1px solid var(--rule);
}
.phase-num{
  width:auto;height:auto;
  background:transparent;border:none;border-radius:0;
  font-family:inherit;font-style:normal;font-weight:500;
  font-size:78px;line-height:0.82;letter-spacing:-0.03em;
  color:var(--mathe-strong);
  box-shadow:none;
  display:block;text-align:center;
}
.phase-head h2{
  font-size:clamp(30px,3.8vw,46px);letter-spacing:-0.01em;line-height:1.05;
  color:var(--mathe-ink);font-weight:500;
}
@media(max-width:720px){
  .phase-head{grid-template-columns:64px 1fr;gap:18px}
  .phase-num{font-size:48px}
}

.formel-box{
  background:linear-gradient(180deg,#faf6ee 0%,#f4ede0 100%);
  border:none;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);
  border-radius:0;
  padding:48px 24px;margin:32px 0;text-align:center;box-shadow:none;
  position:relative;
}
.formel-box::before{
  content:'';position:absolute;left:50%;top:14px;transform:translateX(-50%);
  width:32px;height:1px;background:var(--mathe-strong);opacity:0.4;
}
.formel-box .label{font-size:11px;letter-spacing:0.24em;margin-bottom:14px;color:var(--ink-soft)}
.formel-box .formel{font-size:clamp(28px,3.5vw,42px);margin:0;color:var(--mathe-ink);letter-spacing:-0.01em}
.formel-box .where{font-size:14px;color:var(--ink-soft);margin-top:18px;line-height:1.7;max-width:50ch;margin-left:auto;margin-right:auto}

.worked{
  background:#fff;border:1px solid var(--rule);
  border-radius:14px;
  padding:36px 40px;margin:28px 0;box-shadow:0 1px 0 rgba(0,0,0,0.02);
  position:relative;
}
.worked h3{
  font-family:'Fredoka',sans-serif;font-style:normal;font-weight:500;
  font-size:26px;color:var(--mathe-ink);margin-bottom:8px;letter-spacing:-0.005em;
}
.worked .intro{font-size:15px;color:var(--ink-soft);margin-bottom:24px;line-height:1.65}

.hinweis-card{
  background:transparent;border:1px solid var(--rule);
  border-left:3px solid var(--info-orange);border-radius:0;
  padding:22px 26px;
}
.hinweis-card h4{font-size:19px;margin-bottom:10px;letter-spacing:-0.005em}

.aufgabe{
  background:#fff;border:1px solid var(--rule);
  border-radius:14px;
  padding:32px 36px;margin-bottom:18px;
  transition:border-color .25s, box-shadow .25s;
}
.aufgabe:hover{border-color:var(--mathe-deep);box-shadow:0 4px 16px rgba(0,0,0,0.04)}
.aufgabe.solved{border-color:var(--safe);background:linear-gradient(180deg,#fff 50%,#f6fbef 100%)}
.aufgabe-num{
  background:transparent;border:none;
  font-family:inherit;font-style:normal;font-weight:500;
  font-size:34px;color:var(--mathe-strong);
  width:auto;height:auto;line-height:1;
}
.aufgabe.solved .aufgabe-num{background:transparent;color:var(--safe)}
.aufgabe-title{font-size:24px;letter-spacing:-0.005em;font-weight:500}


.video-item{border-radius:0;border:1px solid var(--rule)}
.video-item h4{font-size:22px;letter-spacing:-0.005em}
.video-item .v-source{letter-spacing:0.2em}

.glossar{
  background:transparent;border:none;
  border-top:1px solid var(--rule);
  border-radius:0;padding:32px 0 24px;margin-top:64px;
}
.glossar summary{font-size:22px;letter-spacing:-0.005em}

.intro-block{
  background:transparent;border:1px solid var(--rule);
  border-radius:0;padding:24px 28px;margin-bottom:40px;
}
.intro-block.is-afb1{border-left:3px solid var(--safe)}
.intro-block.is-afb2{border-left:3px solid var(--info-orange)}
.intro-block.is-afb3{border-left:3px solid var(--danger)}
.intro-block h2{
  font-family:'Fredoka',sans-serif;font-style:normal;font-weight:500;
  font-size:28px;color:var(--mathe-ink);margin-bottom:10px;
}

.info-block{
  background:#fff;border:1px solid var(--rule);
  border-left:3px solid var(--danger);
  border-radius:0;padding:28px 32px;margin-bottom:40px;box-shadow:none;
}
.info-block h2{
  font-family:'Fredoka',sans-serif;font-style:normal;font-weight:500;
  font-size:30px;color:var(--mathe-ink);margin-bottom:10px;
}

.progress-sticky{
  background:rgba(255,255,255,0.94);backdrop-filter:blur(6px);
  border:1px solid var(--rule);border-radius:999px;
  padding:12px 22px;box-shadow:0 4px 14px rgba(0,0,0,0.04);
}
.progress-text{font-family:Inter,sans-serif;font-size:11px;letter-spacing:0.18em;text-transform:uppercase}

.section-head{padding-bottom:18px;border-bottom:1px solid var(--rule)}
.section-head .badge{letter-spacing:0.18em;background:transparent;border:1px solid var(--mathe-strong);color:var(--mathe-strong);padding:5px 14px}
.section-head h2{font-size:clamp(28px,3.2vw,40px);letter-spacing:-0.005em}

.stats-bar{border-radius:999px;background:#fff}
.filter-btn{border-radius:999px;border-width:1.5px}

.fehler-toc{background:transparent;border:none;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);border-radius:0;padding:24px 0}

.topic-intro{font-size:17px;line-height:1.75;color:var(--ink-soft);max-width:68ch;margin-bottom:48px}

.check-btn, .vw-result button{
  border-radius:999px;padding:10px 22px;font-size:13px;letter-spacing:0.04em;
  background:var(--mathe-ink);
}
.check-btn:hover{background:var(--mathe-strong)}
.hilfe-btn{border-radius:999px;border-width:1.5px}

.subhead{
  font-family:inherit;font-style:normal;font-weight:700;
  font-size:26px;color:var(--mathe-ink);margin:36px 0 12px;letter-spacing:-0.005em;
}


/*footer-mint*/footer{background:#11241c;color:#a9c7b8;border-top:3px solid #3aa37a}footer a:hover{color:#7fe3b6}
/*premium-global*/
body{font-family:'Fredoka',Inter,-apple-system,sans-serif}
h1,h2,h3,h4{font-family:'Fredoka',sans-serif;font-weight:700;letter-spacing:-0.012em}
.eyebrow{font-family:'Fredoka',sans-serif;font-weight:600}
:root{--sh-sm:0 1px 2px rgba(40,30,25,.06),0 3px 8px rgba(40,30,25,.07);--sh-md:0 6px 14px -4px rgba(40,30,25,.12),0 16px 32px -12px rgba(40,30,25,.18)}
.subject-card,.grade-card,.topic-card,.sub-card,.phase,.feature,.hinweis-card,.aufgabe,.video-item{box-shadow:var(--sh-sm)!important;transition:transform .2s cubic-bezier(.16,1,.3,1),box-shadow .25s,border-color .2s,background .2s}
.subject-card:hover,.grade-card:hover,.topic-card:hover,.feature:hover{box-shadow:var(--sh-md)!important;transform:translateY(-4px)}
.reveal{opacity:1;transform:none}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1!important;transform:none!important}}
.subject-hero,.topic-hero{position:relative;background-color:#122236;}
.subject-hero::after,.topic-hero::after{content:'';position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.05) 1px,transparent 1px);background-size:22px 22px;opacity:.5;pointer-events:none}
.subject-hero .container,.topic-hero .container{position:relative;z-index:1}
/*m-nav*/
.m-burger{display:none;flex-direction:column;justify-content:center;gap:5px;width:42px;height:42px;background:none;border:0;cursor:pointer;padding:10px;border-radius:10px}
.m-burger span{display:block;height:2.5px;width:100%;background:#2b241d;border-radius:2px;transition:transform .25s,opacity .2s}
.m-burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.m-burger.open span:nth-child(2){opacity:0}
.m-burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.m-menu{display:none;position:absolute;top:100%;left:0;right:0;background:rgba(250,246,238,0.98);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid rgba(0,0,0,.08);box-shadow:0 18px 36px -12px rgba(40,25,40,.25);z-index:60}
.m-menu.open{display:block;animation:mDrop .22s ease}
@keyframes mDrop{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}
.m-menu ul{display:flex;flex-direction:column;list-style:none;margin:0;padding:6px 0 12px}
.m-menu li{opacity:0;transform:translateY(-7px)}
.m-menu.open li{animation:mItem .28s ease forwards}
.m-menu.open li:nth-child(1){animation-delay:.02s}.m-menu.open li:nth-child(2){animation-delay:.06s}.m-menu.open li:nth-child(3){animation-delay:.10s}.m-menu.open li:nth-child(4){animation-delay:.14s}.m-menu.open li:nth-child(5){animation-delay:.18s}.m-menu.open li:nth-child(6){animation-delay:.22s}.m-menu.open li:nth-child(7){animation-delay:.26s}
@keyframes mItem{to{opacity:1;transform:none}}
@media(prefers-reduced-motion:reduce){.m-menu.open{animation:none}.m-menu li{opacity:1;transform:none}.m-menu.open li{animation:none}}
.m-menu a{display:block;padding:13px 26px;font-size:16px;font-family:'Fredoka',sans-serif;color:#2b241d;border-bottom:1px solid rgba(0,0,0,.04)}
.m-menu a:hover,.m-menu a.active{color:#3aa37a;background:rgba(58,163,122,.08)}
@media(max-width:560px){.m-burger{display:flex}}
@media(min-width:561px){.m-burger,.m-menu{display:none!important}}

/*typo-fix*/
em,i,cite,dfn{font-style:normal!important}
h1,h2,h3,h4{font-family:'Fredoka',sans-serif!important;font-weight:700;font-style:normal}
h1 em,h2 em,h3 em,h4 em{font-style:normal!important}
.subject-hero h1,.topic-hero h1,.hero h1{font-style:normal}

/*font-force*/
h1,h2,h3,h4,h5,h6,.section-head h2,.abschnitt-head h3,.sub-titel,.sub-num,.sub-arrow,.sub-meta,.topic-card h4,.grade-card h3,.subject-card h3,.subject-card h3 *,.aufgabe-title,.aufgabe-num,.worked h3,.applet h3,.hinweis-card h4,.glossar summary,.ausblick h3,.lernziele h2,.phase h4,.feature h4,.subtitle,.hero-lead,.lead,.topic-intro{font-family:'Fredoka',Inter,sans-serif!important;font-style:normal!important}

/*hero-white*/.subject-hero h1 em,.topic-hero h1 em,.hero h1 em{color:#fff!important;font-style:normal!important}
/*video-facade 2026-08-21 (Stil wie Reaktivierung 0.1-0.3)*/
.vid-head{margin:48px 0 12px}
.vid-head .kick{display:inline-flex;align-items:center;gap:8px;font-family:'Fredoka',Inter,sans-serif;font-size:11.5px;font-weight:600;letter-spacing:.13em;text-transform:uppercase;color:var(--mathe-strong,#3a5a8c)}
.vid-head .kick svg{width:15px;height:15px}
.video-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:18px;margin:14px 0 0}
.video-grid.single{grid-template-columns:1fr;max-width:760px}
@media(max-width:760px){.video-grid{grid-template-columns:1fr}}
.video-embed{position:relative;width:100%;aspect-ratio:16/9;border:1px solid var(--rule);border-radius:16px;overflow:hidden;background:var(--mathe-ink,#15294a);box-shadow:var(--sh-md,0 16px 32px -12px rgba(20,30,55,.28))}
.video-embed iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.vplay{position:absolute;inset:0;width:100%;height:100%;padding:0;margin:0;border:0;background:none;display:block;cursor:pointer;font:inherit;color:#fff}
.vposter{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#3a5a8c 0%,#15294a 100%);transition:transform .5s cubic-bezier(.2,.8,.25,1)}
.vposter.alt{background:linear-gradient(135deg,#4a6f9b 0%,#1c3357 100%)}
.vposter.c3{background:linear-gradient(135deg,#2c5fb5 0%,#15294a 100%)}
.vposter.c4{background:linear-gradient(135deg,#5b8bd8 0%,#23406e 100%)}
.vposter.c5{background:linear-gradient(135deg,#33578f 0%,#101f3a 100%)}
.vp-ico{font-family:inherit;font-size:38px;color:rgba(255,255,255,.28);letter-spacing:.02em}
.vshade{position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,.12) 0%,rgba(0,0,0,0) 38%,rgba(0,0,0,.55) 78%,rgba(0,0,0,.8) 100%)}
.vbtn{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:68px;height:68px;border-radius:50%;background:var(--mathe-strong,#3a5a8c);display:flex;align-items:center;justify-content:center;box-shadow:0 10px 28px rgba(0,0,0,.42);transition:transform .25s cubic-bezier(.2,.8,.25,1),background .25s}
.vbtn svg{width:30px;height:30px;margin-left:4px;color:#fff}
.vtitle{position:absolute;left:20px;right:20px;bottom:16px;font-family:'Fredoka',Inter,sans-serif;font-weight:600;font-size:17px;line-height:1.25;text-align:left;text-shadow:0 2px 10px rgba(0,0,0,.55)}
.vplay:hover .vposter{transform:scale(1.04)}
.vplay:hover .vbtn{transform:translate(-50%,-50%) scale(1.09)}
.vplay:focus-visible{outline:3px solid var(--mathe-strong,#3a5a8c);outline-offset:3px}
.video-cap{font-size:13.5px;color:var(--ink-soft,#5b4f43);margin-top:12px}
.video-cap a{color:var(--mathe-strong,#3a5a8c);text-decoration:underline}
@media(max-width:560px){.vbtn{width:56px;height:56px}.vbtn svg{width:24px;height:24px}.vtitle{font-size:15px;left:15px;right:15px;bottom:13px}}
@media(prefers-reduced-motion:reduce){.vposter,.vbtn{transition:none}}
@media print{.video-grid,.vid-head,.video-cap{display:none}}


.topic-hero .hero-grid{display:grid;grid-template-columns:1.35fr 1fr;gap:48px;align-items:center}
.topic-hero .subtitle{margin-top:14px;color:rgba(255,255,255,0.92);font-size:17px;line-height:1.7;max-width:54ch}
.topic-hero .hero-proof{display:flex;align-items:center;justify-content:center}
.topic-hero .hero-proof svg{width:100%;max-width:380px;height:auto;filter:drop-shadow(0 14px 30px rgba(0,0,0,0.35))}
@media(max-width:820px){.topic-hero .hero-grid{grid-template-columns:1fr}.topic-hero .hero-proof{order:-1;max-width:320px;margin:0 auto 8px}}
@keyframes hpDrawIn{from{stroke-dashoffset:1000}to{stroke-dashoffset:0}}
@keyframes hpFadeIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
@keyframes hpScaleIn{from{opacity:0;transform:scale(.85)}to{opacity:1;transform:scale(1)}}
@keyframes hpSlideR{from{opacity:0;transform:translateX(-30px)}to{opacity:1;transform:translateX(0)}}
@keyframes hpRotate{to{transform:rotate(360deg)}}
@keyframes hpUpDown{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}
.hero-proof [data-anim]{transform-box:fill-box;transform-origin:center}
.hero-proof [data-anim="fadeIn"]{animation:hpFadeIn .9s cubic-bezier(.16,1,.3,1) both}
.hero-proof [data-anim="scaleIn"]{animation:hpScaleIn .9s cubic-bezier(.34,1.56,.64,1) both}
.hero-proof [data-anim="slideR"]{animation:hpSlideR .9s cubic-bezier(.16,1,.3,1) both}
.hero-proof [data-anim="drawIn"]{stroke-dasharray:1000;stroke-dashoffset:1000;animation:hpDrawIn 1.4s cubic-bezier(.65,0,.35,1) both}
.hero-proof [data-delay="1"]{animation-delay:.4s}
.hero-proof [data-delay="2"]{animation-delay:.9s}
.hero-proof [data-delay="3"]{animation-delay:1.5s}
.hero-proof [data-delay="4"]{animation-delay:2.1s}
.hero-proof [data-delay="5"]{animation-delay:2.7s}
.hero-proof [data-delay="6"]{animation-delay:3.4s}
@media(prefers-reduced-motion:reduce){
  .hero-proof *{animation:none !important;opacity:1 !important;stroke-dashoffset:0 !important}
}

/*breite-text*/:root{--measure:none}.erklaer-text,.intro-lead,.stichliste,.topic-intro,.lead,.kontext,.fakten,.erklaer-text p{max-width:none!important}.erklaer-text,.erklaer-text p,.intro-lead,.topic-intro,.kontext{text-align:justify;text-justify:inter-word;-webkit-hyphens:auto;hyphens:auto;line-height:2.05}.stichliste{line-height:1.95}.stichliste li{line-height:1.85}.aufgabe-text,.aufgabe-text p,.worked-step,.glossar-item .def{line-height:1.95}
/*k10-angleichung 2026-08-18*/
/* --- Inhaltsverzeichnis: volle Breite, Karten-Look --- */
.toc{max-width:none!important;width:100%!important;background:var(--bg-soft)!important;border:1px solid var(--rule)!important;border-radius:16px!important;padding:26px 30px!important;margin:0 0 34px 0!important;box-shadow:var(--sh-sm)}
.toc-list{display:flex!important;flex-direction:column!important;gap:6px!important}
.toc-list a{font-size:15.5px!important;padding:11px 14px!important;border-radius:10px!important}
.toc-list .toc-num{width:28px!important;height:28px!important;font-size:13px!important}
@media(max-width:640px){.toc{padding:22px 20px!important}}

/* --- Einheitliche Schriftgrößen (Anlehnung Informatik K10 1.1/1.2) --- */
.topic-hero h1{font-size:clamp(28px,3.2vw,38px)!important;line-height:1.14!important;margin-bottom:12px!important;letter-spacing:-0.012em!important}
.topic-hero .subtitle,.topic-hero .untertitel{font-size:17px!important;line-height:1.65!important;max-width:62ch!important}
.panel{padding:44px 0 100px}

/* Phasen als Karten mit kleiner Nummer statt Riesenziffer */
.phase{background:var(--bg-soft);border:1px solid var(--rule);border-radius:20px;padding:32px 36px;margin:0 0 24px!important;box-shadow:var(--sh-sm)}
.phase-head{display:flex!important;align-items:center!important;gap:13px!important;grid-template-columns:none!important;border-bottom:0!important;padding-bottom:0!important;margin-bottom:14px!important}
.phase-num{width:28px!important;height:28px!important;flex-shrink:0;display:flex!important;align-items:center!important;justify-content:center!important;border-radius:9px!important;background:var(--mathe-strong,#3a5a8c)!important;color:#fff!important;font-family:'Fredoka',sans-serif!important;font-style:normal!important;font-weight:600!important;font-size:14px!important;line-height:1!important;letter-spacing:0!important;box-shadow:0 3px 8px -2px rgba(20,45,90,.45)!important;text-align:center!important}
.phase-head h2{font-size:27px!important;line-height:1.16!important;color:var(--mathe-ink)!important;letter-spacing:-0.012em!important;font-weight:700!important}
.phase-head h2 em{font-style:normal!important}
@media(max-width:640px){.phase{padding:24px 20px}.phase-head h2{font-size:23px!important}}

/* Fließtext einheitlich */
.erklaer-text,.phase p,.lead,.intro-lead,.topic-intro,.aufgabe-text,.aufgabe-text p,.stichliste li{font-size:17px!important;line-height:1.7!important}
.erklaer-text,.erklaer-text p,.intro-lead,.topic-intro,.kontext{text-align:left!important;line-height:1.7!important}
.stichliste{line-height:1.7!important}

/* Zwischenüberschriften / Karten */
.uebersicht-card h3,.bruecke-bonus h3,.selbst h3{font-size:20px!important;font-style:normal!important;letter-spacing:-0.008em!important}
.aufgabe-title{font-size:17px!important;font-style:normal!important;font-weight:600!important;letter-spacing:0!important}
.aufgabe-num{width:34px!important;height:34px!important;border-radius:9px!important;background:var(--accent,#dbe6f5)!important;border:1.5px solid var(--rule)!important;color:var(--mathe-ink,#15294a)!important;font-family:'Fredoka',sans-serif!important;font-style:normal!important;font-weight:600!important;font-size:13.5px!important;line-height:1!important;display:flex!important;align-items:center!important;justify-content:center!important}
.section-head h2{font-size:27px!important;letter-spacing:-0.012em!important}
.formel-box{padding:30px 24px!important;border-radius:16px!important;border:1px solid var(--rule)!important}
.formel-box .formel{font-size:26px!important}
.glossar summary,.video-item h4{font-size:17px!important;letter-spacing:0!important}
.lernziele li{font-size:17px!important;line-height:1.6!important}

/*idx-fix*/.input-row label sub,.aufgabe-text sub,.hilfe-content sub{font-size:0.72em;line-height:0;vertical-align:-0.28em;font-weight:inherit}
/*hero-einheitlich 2026-08-27: identische Hero-Hoehe im ganzen Kapitel*/
.topic-hero{height:calc(1.1 * (228.55px + 1.65 * clamp(44px, 6vw, 76px)));display:flex;align-items:center;overflow:hidden;padding:0 !important}
.topic-hero>.container{width:100%;position:relative;z-index:2}
.topic-hero>.wow-hero-glyphs{position:absolute;inset:0}
.topic-hero>.wow-scroll-cue{position:absolute;bottom:18px;left:50%}
@media(max-width:880px){.topic-hero{height:auto;display:block;padding:60px 0 50px !important}}
@media print{.topic-hero{height:auto !important;display:block !important;padding:0 0 12pt !important}}

/* typo-normalisierung 2026-08-27: Rest-Ausreisser aus Premium-v1 einfangen */
.subhead{font-size:21px!important;line-height:1.3!important;letter-spacing:-0.008em!important;margin:30px 0 10px!important}
.worked h3{font-size:20px!important;letter-spacing:-0.005em!important}
.vorwissen h2{font-size:22px!important;letter-spacing:-0.005em!important}
.bridge h3{font-size:20px!important;letter-spacing:-0.005em!important}
.uebersicht-card h3{font-size:20px!important}
.hinweis-card h4,.hinweis-card h3{font-size:17px!important;letter-spacing:-0.005em!important}
.formel-box .formel{font-size:26px!important;line-height:1.35!important}
.work-step .calc{font-size:19px!important}
.thema-head h2,.afb-block-head h2{font-size:21px!important}
.xlink .xt{font-size:16px!important}
@media(max-width:640px){.subhead{font-size:19px!important}.worked h3,.bridge h3,.vorwissen h2{font-size:18px!important}.formel-box .formel{font-size:22px!important}}

/* HERO-2L v1 */
.subject-hero h1,.topic-hero h1,.hero h1{font-size:clamp(38px,5vw,58px)!important;line-height:1.06!important;letter-spacing:-0.015em!important;margin-bottom:0!important;white-space:normal!important}
.subject-hero .subtitle,.subject-hero .hero-lead,.subject-hero .lead,.subject-hero .untertitel,.subject-hero .topic-intro,.subject-hero .ah-lead,.subject-hero .sub,.topic-hero .subtitle,.topic-hero .hero-lead,.topic-hero .lead,.topic-hero .untertitel,.topic-hero .topic-intro,.topic-hero .ah-lead,.topic-hero .sub,.hero .subtitle,.hero .hero-lead,.hero .lead,.hero .untertitel,.hero .topic-intro,.hero .ah-lead,.hero .sub{font-family:'Fredoka',Inter,sans-serif!important;font-weight:400!important;font-size:16.5px!important;line-height:1.58!important;max-width:620px!important;margin-top:12px!important;margin-bottom:0!important;color:rgba(255,255,255,0.92)!important;display:-webkit-box!important;-webkit-box-orient:vertical!important;-webkit-line-clamp:2!important;overflow:hidden!important;text-wrap:initial!important}
.subject-hero .subtitle em,.subject-hero .hero-lead em,.subject-hero .lead em,.topic-hero .subtitle em,.topic-hero .hero-lead em,.topic-hero .lead em,.hero .subtitle em,.hero .hero-lead em,.hero .lead em,.subject-hero .subtitle strong,.topic-hero .subtitle strong,.hero .subtitle strong,.topic-hero .hero-lead strong,.topic-hero .lead strong{font-style:normal!important;font-weight:500!important;color:#fff!important}
.subject-hero .hero-grid,.topic-hero .hero-grid,.hero .hero-grid{grid-template-columns:620px minmax(0,1fr)!important}
@media(max-width:820px){.subject-hero .hero-grid,.topic-hero .hero-grid,.hero .hero-grid{grid-template-columns:1fr!important}}
@media(max-width:700px){.subject-hero .subtitle,.subject-hero .hero-lead,.subject-hero .lead,.topic-hero .subtitle,.topic-hero .hero-lead,.topic-hero .lead,.hero .subtitle,.hero .hero-lead,.hero .lead{max-width:100%!important;-webkit-line-clamp:4!important}}