/* Testklar – Designsystem «Karoheft»
   Papier, Tinte, Leuchtmarker. Bewegung nur mit transform/opacity,
   immer mit prefers-reduced-motion abgesichert. */

@font-face{font-family:Inter;font-weight:400;font-display:swap;src:url(/assets/fonts/Inter-Regular.woff) format('woff')}
@font-face{font-family:Inter;font-weight:600;font-display:swap;src:url(/assets/fonts/Inter-SemiBold.woff) format('woff')}
@font-face{font-family:Inter;font-weight:800;font-display:swap;src:url(/assets/fonts/Inter-ExtraBold.woff) format('woff')}

@property --fold{syntax:'<number>';inherits:true;initial-value:0}

:root{
  --paper:#FBFAF5; --paper-2:#F3F1E8; --white:#FFFFFF;
  --ink:#16181D; --ink-2:#4A4F5A; --ink-3:#7A7F89;
  --pen:#2346A0;            /* Füllfeder-Blau */
  --pen-soft:#E7ECF8;
  --red:#D93B30;            /* Korrekturstift */
  --mark:#FFE14D;           /* Leuchtmarker */
  --grid:rgba(35,70,160,.075);
  --line:#E3E0D5;
  --r:14px;
  --shadow:0 1px 0 rgba(22,24,29,.04),0 10px 30px -12px rgba(22,24,29,.18);
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;font-family:Inter,system-ui,-apple-system,sans-serif;color:var(--ink);background:var(--paper);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit}
img,svg{display:block;max-width:100%}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
.narrow{max-width:760px}
h1,h2,h3{letter-spacing:-.03em;line-height:1.06;margin:0;font-weight:800}
h1{font-size:clamp(42px,7vw,82px)}
h2{font-size:clamp(30px,4.4vw,50px)}
h3{font-size:20px;letter-spacing:-.015em;font-weight:600;line-height:1.25}
p{margin:0 0 1em}
.lead{font-size:clamp(18px,2.1vw,21px);color:var(--ink-2);max-width:560px;margin:22px 0 30px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--pen);letter-spacing:.02em;margin-bottom:18px}
.eyebrow:before{content:'';width:18px;height:2px;background:var(--pen);border-radius:2px}
.muted{color:var(--ink-3)}
.src{font-size:13px;color:var(--ink-3)}
.src a{color:var(--ink-3)}

/* Karopapier */
.grid-paper{background-color:var(--paper);background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:24px 24px;background-position:-1px -1px}

/* Header */
.top{position:sticky;top:0;z-index:20;background:rgba(251,250,245,.88);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid transparent;transition:border-color .2s}
.top.scrolled{border-color:var(--line)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:inline-flex;align-items:center;gap:8px;font-weight:800;font-size:20px;letter-spacing:-.035em;text-decoration:none}
.brand svg{width:22px;height:22px}
.nav{display:flex;align-items:center;gap:26px}
.nav a{text-decoration:none;font-size:15px;font-weight:600;color:var(--ink-2)}
.nav a:hover{color:var(--ink)}
.nav .pill{color:var(--ink);background:var(--white);border:1.5px solid var(--ink);padding:7px 14px;border-radius:999px}
@media(max-width:720px){.nav .hide-s{display:none}.nav{gap:14px}}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:10px;background:var(--ink);color:#fff;text-decoration:none;font-weight:600;font-size:16px;padding:15px 22px;border-radius:12px;border:0;cursor:pointer;font-family:inherit;transition:transform .15s ease,background .15s}
.btn:hover{background:#000;transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn.line{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 1.5px var(--ink)}
.btn.line:hover{background:var(--white)}
.btn svg{width:18px;height:18px}
.btn-row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.note{font-size:14px;color:var(--ink-3);margin-top:14px}

/* Leuchtmarker */
.mark{background-image:linear-gradient(100deg,transparent 0 2%,var(--mark) 2% 97%,transparent 97%);background-repeat:no-repeat;background-size:100% 62%;background-position:0 78%;padding:0 .08em;margin:0 -.04em}
@media (prefers-reduced-motion:no-preference){
  .mark.sweep{background-size:0% 62%;animation:sweep .9s cubic-bezier(.3,.7,.2,1) .45s forwards}
}
@keyframes sweep{to{background-size:100% 62%}}

/* Gezeichnete Linien (Unterstreichungen, Pfeile, Kreise) */
.draw path{fill:none;stroke-linecap:round;stroke-linejoin:round}
@media (prefers-reduced-motion:no-preference){
  .draw path{stroke-dasharray:1;stroke-dashoffset:1}
  .draw.on path{transition:stroke-dashoffset 1.1s cubic-bezier(.45,.1,.2,1);stroke-dashoffset:0}
  .draw.on path:nth-child(2){transition-delay:.35s}
  .draw.on path:nth-child(3){transition-delay:.6s}
  .draw.auto path{animation:drawin 1s cubic-bezier(.45,.1,.2,1) .5s forwards}
}
@keyframes drawin{to{stroke-dashoffset:0}}

/* Hero */
.hero{padding:72px 0 88px;overflow:hidden}
.hero .wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
@media(max-width:920px){.hero .wrap{grid-template-columns:1fr;gap:44px}.hero{padding:44px 0 64px}}
.h1-under{position:relative;display:inline-block}
.h1-under svg{position:absolute;left:-2%;bottom:-.16em;width:104%;height:.32em;overflow:visible}

/* Testblatt (Quiz) */
.sheet{background:var(--white);border-radius:var(--r);box-shadow:var(--shadow);border:1px solid #ECE9DF;position:relative}
.quiz{padding:26px 26px 22px;transform:rotate(.6deg)}
@media(max-width:920px){.quiz{transform:none}}
.quiz-head{display:flex;justify-content:space-between;align-items:center;font-size:13px;font-weight:600;color:var(--ink-3);margin-bottom:16px;gap:12px}
.chip{display:inline-flex;align-items:center;gap:6px;background:var(--paper-2);border-radius:999px;padding:4px 10px;font-variant-numeric:tabular-nums}
.chip.cat{background:var(--pen-soft);color:var(--pen)}
.timer-bar{height:3px;background:var(--paper-2);border-radius:3px;overflow:hidden;margin:-4px 0 18px}
.timer-bar i{display:block;height:100%;width:100%;background:var(--pen);transform-origin:left;transform:scaleX(1)}
.quiz .q{font-size:19px;font-weight:600;line-height:1.4;margin:0 0 18px;letter-spacing:-.01em}
.opts{display:grid;gap:8px}
.opt{display:flex;align-items:center;gap:12px;width:100%;text-align:left;font:inherit;font-size:16px;color:var(--ink);background:var(--white);border:1.5px solid var(--line);border-radius:11px;padding:11px 14px;cursor:pointer;transition:border-color .15s,background .15s,transform .1s}
.opt:hover:not([disabled]){border-color:var(--ink)}
.opt:active:not([disabled]){transform:scale(.995)}
.opt .k{flex:none;width:24px;height:24px;border-radius:7px;border:1.5px solid currentColor;display:inline-flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;color:var(--ink-3)}
.opt[disabled]{cursor:default}
.opt.right{border-color:var(--pen);background:var(--pen-soft)}
.opt.right .k{color:var(--pen)}
.opt.wrong{border-color:var(--red);background:#FDF0EE}
.opt.wrong .k{color:var(--red)}
.opt .tick{margin-left:auto;width:26px;height:22px;flex:none}
.feedback{margin-top:16px;font-size:15px;color:var(--ink-2);display:none}
.feedback.show{display:block}
.feedback b{color:var(--ink)}
.quiz-foot{display:flex;justify-content:space-between;align-items:center;margin-top:18px;gap:12px}
.dots{display:flex;gap:6px}
.dots i{width:8px;height:8px;border-radius:50%;background:var(--line)}
.dots i.done{background:var(--ink)}
.dots i.ok{background:var(--pen)}
.dots i.no{background:var(--red)}
.next{font:inherit;font-weight:600;font-size:15px;background:var(--ink);color:#fff;border:0;border-radius:10px;padding:10px 16px;cursor:pointer;visibility:hidden}
.next.show{visibility:visible}
.result{text-align:center;padding:12px 4px 4px}
.result .score{font-size:64px;font-weight:800;letter-spacing:-.04em;line-height:1}
.result p{color:var(--ink-2)}
.paperclip{position:absolute;top:-18px;right:34px;width:22px;height:54px}
.stamp{position:absolute;left:-14px;top:-14px;background:var(--mark);color:var(--ink);font-size:12px;font-weight:800;padding:6px 10px;border-radius:6px;transform:rotate(-6deg);box-shadow:0 4px 12px -4px rgba(0,0,0,.25)}

/* Sektionen */
.sec{padding:110px 0}
@media(max-width:720px){.sec{padding:76px 0}}
.sec-head{max-width:680px;margin-bottom:52px}
.sec-head p{color:var(--ink-2);font-size:18px;margin-top:16px}

/* Inhaltsverzeichnis */
.toc{list-style:none;margin:0;padding:0;border-top:2px solid var(--ink)}
.toc li{display:grid;grid-template-columns:52px 1fr auto;gap:18px;align-items:baseline;padding:22px 0;border-bottom:1px solid var(--line)}
.toc .nr{font-weight:800;font-size:15px;color:var(--pen);font-variant-numeric:tabular-nums}
.toc h3{margin-bottom:4px}
.toc p{margin:0;color:var(--ink-2);font-size:15.5px}
.toc .cnt{font-size:14px;font-weight:600;color:var(--ink-3);white-space:nowrap;font-variant-numeric:tabular-nums}
@media(max-width:600px){.toc li{grid-template-columns:36px 1fr}.toc .cnt{grid-column:2}}

/* Würfel: Treppennetz, faltet Schritt für Schritt beim Scrollen */
.cube-track{height:240vh;view-timeline-name:--cube}
.cube-sticky{position:sticky;top:66px;min-height:calc(100vh - 66px);display:grid;grid-template-columns:1fr 1.1fr;gap:40px;align-items:center}
@media(max-width:920px){.cube-track{height:220vh}.cube-sticky{grid-template-columns:1fr;gap:0;align-content:center}}
.stage{height:440px;display:flex;align-items:center;justify-content:center;perspective:1200px}
@media(max-width:920px){.stage{height:300px}}
.cube{--s:76px;position:relative;width:var(--s);height:var(--s);transform-style:preserve-3d;transform:rotateX(56deg) rotateZ(-36deg) translateX(calc(var(--s) * -.5 * (1 - var(--fold)))) translateZ(calc(var(--s) * -.25 * var(--fold)))}
@media(max-width:600px){.cube{--s:64px}}
.face{position:absolute;width:var(--s);height:var(--s);transform-style:preserve-3d;background:var(--white);border:2px solid var(--pen);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:calc(var(--s) * .38);color:var(--pen)}
.face.base{left:0;top:0;background:var(--pen-soft)}
.face.one{background:var(--mark)}
.face[class*=" h-"]{--p:clamp(0, calc((var(--fold) - var(--st)) * 2.5), 1)}
.h-n{left:-2px;top:calc(var(--s) * -1);transform-origin:50% 100%;transform:rotateX(calc(var(--p) * -90deg))}
.h-s{left:-2px;top:calc(var(--s) - 4px);transform-origin:50% 0;transform:rotateX(calc(var(--p) * 90deg))}
.h-w{top:-2px;left:calc(var(--s) * -1);transform-origin:100% 50%;transform:rotateY(calc(var(--p) * 90deg))}
.h-e{top:-2px;left:calc(var(--s) - 4px);transform-origin:0 50%;transform:rotateY(calc(var(--p) * -90deg))}
.fold-wrap{--fold:0}
@media (prefers-reduced-motion:no-preference){
  .fold-wrap.play{animation:fold 6s cubic-bezier(.5,0,.3,1) .3s infinite alternate}
  @supports (animation-timeline:view()){
    .fold-wrap.scrolly{animation:fold linear both;animation-timeline:--cube;animation-range:contain 8% contain 88%}
  }
}
@keyframes fold{0%,8%{--fold:0}92%,100%{--fold:1}}
.fold-progress{display:flex;align-items:center;gap:12px;font-size:13px;font-weight:600;color:var(--ink-3);margin-top:22px}
.fold-progress .bar{flex:1;max-width:220px;height:4px;border-radius:4px;background:var(--paper-2);overflow:hidden}
.fold-progress .bar i{display:block;height:100%;background:var(--pen);transform-origin:left;transform:scaleX(var(--fold))}
.answer{margin-top:22px;background:var(--white);border:1px solid var(--line);border-left:4px solid var(--pen);border-radius:10px;padding:14px 18px;opacity:clamp(0, calc((var(--fold) - .9) * 10), 1);transform:translateY(calc((1 - clamp(0, calc((var(--fold) - .9) * 10), 1)) * 8px))}
.answer b{color:var(--pen)}
@media (prefers-reduced-motion:reduce){.answer{opacity:1;transform:none}}

/* Schritte mit Stiftlinie */
.steps{position:relative;display:grid;grid-template-columns:repeat(3,1fr);gap:40px}
@media(max-width:820px){.steps{grid-template-columns:1fr;gap:34px}}
.step .num{width:58px;height:58px;position:relative;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:22px;margin-bottom:18px;color:var(--pen)}
.step .num svg{position:absolute;inset:0;width:100%;height:100%;overflow:visible}
.step p{color:var(--ink-2);margin:8px 0 0}
.pen-line{position:absolute;left:58px;right:0;top:29px;height:20px;pointer-events:none}
@media(max-width:820px){.pen-line{display:none}}

/* Eltern */
.parents{background:var(--ink);color:#fff}
.parents .sec-head p{color:#B9BDC6}
.parents .eyebrow{color:#9DB4FF}.parents .eyebrow:before{background:#9DB4FF}
.facts{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid #2E323B}
@media(max-width:820px){.facts{grid-template-columns:1fr}}
.fact{padding:30px 28px 30px 0}
.fact+.fact{padding-left:28px;border-left:1px solid #2E323B}
@media(max-width:820px){.fact,.fact+.fact{padding:26px 0;border-left:0;border-bottom:1px solid #2E323B}}
.fact .big{font-size:clamp(44px,5vw,60px);font-weight:800;letter-spacing:-.04em;line-height:1}
.fact p{color:#C9CDD4;margin:12px 0 10px;font-size:16px}
.fact .src,.fact .src a{color:#868B95}
.isnot{display:grid;grid-template-columns:1fr 1fr;gap:28px;margin-top:64px}
@media(max-width:820px){.isnot{grid-template-columns:1fr}}
.isnot h3{color:#fff;margin-bottom:14px}
.isnot ul{list-style:none;padding:0;margin:0}
.isnot li{padding:10px 0 10px 32px;position:relative;color:#D5D8DE;border-top:1px solid #2E323B}
.isnot li svg{position:absolute;left:0;top:13px;width:18px;height:18px}

/* Download */
.dl{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}
@media(max-width:860px){.dl{grid-template-columns:1fr}}
.booklet{position:relative;max-width:360px;margin:0 auto;aspect-ratio:210/297;width:100%}
.booklet .pg{position:absolute;inset:0;background:var(--white);border-radius:6px;box-shadow:var(--shadow);border:1px solid #ECE9DF}
.booklet .pg:nth-child(1){transform:rotate(-5deg) translate(-14px,10px)}
.booklet .pg:nth-child(2){transform:rotate(3deg) translate(10px,4px)}
.booklet .pg.front{padding:26px 24px;display:flex;flex-direction:column;justify-content:space-between;overflow:hidden}
.booklet .front .t{font-size:30px;font-weight:800;letter-spacing:-.04em;line-height:1.02}
.booklet .front .k{font-size:11px;font-weight:700;color:var(--pen);letter-spacing:.06em;text-transform:uppercase}
.booklet .front .chips{display:flex;flex-wrap:wrap;gap:5px}
.booklet .front .chips span{font-size:10px;font-weight:600;border:1px solid var(--line);border-radius:999px;padding:2px 8px}
@media (prefers-reduced-motion:no-preference){
  .booklet:hover .pg.front{transform:rotate(-1deg) translateY(-6px)}
  .booklet .pg{transition:transform .35s cubic-bezier(.3,.7,.2,1)}
}

/* FAQ */
.faq details{border-top:1px solid var(--line);padding:20px 0}
.faq details:last-child{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;list-style:none;font-weight:600;font-size:18px;display:flex;justify-content:space-between;gap:20px;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{content:'';flex:none;width:12px;height:12px;border-right:2px solid var(--ink);border-bottom:2px solid var(--ink);transform:rotate(45deg) translateY(-3px);transition:transform .2s}
.faq details[open] summary:after{transform:rotate(-135deg) translateY(-3px)}
.faq details p{margin:12px 0 0;color:var(--ink-2);max-width:640px}

/* Einblenden beim Scrollen (dezent) */
@media (prefers-reduced-motion:no-preference){
  .rise{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.2,1)}
  .rise.on{opacity:1;transform:none}
  .rise.d1{transition-delay:.08s}.rise.d2{transition-delay:.16s}.rise.d3{transition-delay:.24s}
}

/* Unterseiten */
.page-hero{padding:64px 0 34px}
.prose{max-width:740px}
.prose h2{font-size:clamp(26px,3.4vw,36px);margin:56px 0 16px}
.prose p,.prose li{color:#2C3039}
.prose ul{padding-left:22px}
.prose li{margin:4px 0}
.callout{background:var(--white);border:1px solid var(--line);border-left:4px solid var(--mark);border-radius:10px;padding:16px 20px;margin:24px 0}
.task{padding:22px 24px;margin-bottom:16px}
.task .tag{display:inline-block;font-size:12px;font-weight:600;color:var(--pen);background:var(--pen-soft);border-radius:999px;padding:3px 10px;margin-bottom:10px}
.task .q{font-weight:600;font-size:17px;margin:0 0 12px}
.task ol{margin:0;padding-left:22px;columns:2;column-gap:28px}
@media(max-width:600px){.task ol{columns:1}}
.task li{margin:3px 0}
.task details{margin-top:12px}
.task summary{cursor:pointer;font-weight:600;color:var(--pen);font-size:15px;list-style:none}
.task summary::-webkit-details-marker{display:none}
.task summary:before{content:'→ '}
.task details p{margin:8px 0 0;color:var(--ink-2)}
.cta-band{background:var(--ink);color:#fff;border-radius:18px;padding:34px;margin:40px 0}
.cta-band h2{color:#fff;margin:0 0 8px;font-size:clamp(26px,3.4vw,34px)}
.cta-band p{color:#C9CDD4}
.cta-band .btn{background:#fff;color:var(--ink)}

/* Footer */
footer{border-top:1px solid var(--line);padding:44px 0 56px;font-size:14px;color:var(--ink-3)}
footer .wrap{display:flex;flex-wrap:wrap;gap:16px 40px;justify-content:space-between}
footer a{color:var(--ink-3)}
.disc{font-size:12.5px;max-width:600px;margin-top:8px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
:focus-visible{outline:2.5px solid var(--pen);outline-offset:3px;border-radius:6px}