:root{
  --paper:#f7f4ee; --paper-2:#efeae0; --ink:#1c2321; --muted:#566360;
  --teal:#1d6b62; --teal-d:#154f49; --blue:#1f5fcf; --line:#d9d2c4;
  --serif:"Fraunces","Source Serif 4",Georgia,serif;
  --sans:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
  --r:18px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{margin:0;background:var(--paper);color:var(--ink);font:400 17px/1.65 var(--sans);-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue)}
:focus-visible{outline:3px solid var(--blue);outline-offset:3px;border-radius:6px}
.skip{position:absolute;left:-999px;top:8px;background:#fff;padding:8px 14px;border-radius:8px;z-index:100}
.skip:focus{left:8px}
.wrap{width:min(1200px,100% - 40px);margin-inline:auto}
.narrow{width:min(780px,100% - 40px)}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(247,244,238,.88);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid rgba(0,0,0,.06)}
.bar{display:flex;align-items:center;gap:24px;height:64px}
.brand{display:flex;align-items:baseline;gap:8px;text-decoration:none;color:var(--ink)}
.brand-name{font:600 25px/1 var(--serif);letter-spacing:-.01em}
.brand-sub{font:500 12px/1 var(--sans);letter-spacing:.14em;text-transform:uppercase;color:var(--teal)}
.nav{display:flex;gap:26px;margin-left:auto}
.nav a{color:var(--muted);text-decoration:none;font-size:15px;font-weight:500}
.nav a:hover{color:var(--ink)}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;padding:14px 26px;border-radius:999px;font-weight:600;font-size:16px;text-decoration:none;transition:transform .2s,background .2s,box-shadow .2s;border:1.5px solid transparent}
.btn-primary{background:var(--teal);color:#fff;box-shadow:0 6px 18px -8px rgba(29,107,98,.7)}
.btn-primary:hover{background:var(--teal-d);transform:translateY(-1px)}
.btn-ghost{border-color:var(--line);color:var(--ink);background:rgba(255,255,255,.5)}
.btn-ghost:hover{border-color:var(--teal);color:var(--teal)}
.btn-light{background:#fff;color:var(--teal-d)}
.btn-light:hover{transform:translateY(-1px)}
.btn-sm{padding:9px 18px;font-size:14.5px}

/* type */
h1,h2,h3{font-family:var(--serif);font-weight:500;letter-spacing:-.015em;line-height:1.12;margin:0}
h1{font-size:clamp(38px,5.6vw,68px)}
h1 em{font-style:italic;color:var(--teal)}
h2{font-size:clamp(30px,3.8vw,46px)}
h3{font-size:clamp(23px,2.4vw,30px)}
.eyebrow{font:600 12.5px/1.3 var(--sans);letter-spacing:.14em;text-transform:uppercase;color:var(--teal);margin:0 0 14px}
.lead{font-size:clamp(18px,1.6vw,21px);color:var(--muted);max-width:34em;margin:22px 0 0}
.fine{font-size:14px;color:var(--muted);margin:16px 0 0}

/* hero */
.hero{position:relative;padding:clamp(48px,7vw,96px) 0 clamp(56px,8vw,110px);overflow:hidden}
.staff-bg{position:absolute;left:0;right:0;top:6%;width:100%;height:220px;color:rgba(29,107,98,.16);pointer-events:none;-webkit-mask-image:linear-gradient(90deg,transparent,#000 25%,#000 75%,transparent);mask-image:linear-gradient(90deg,transparent,#000 25%,#000 75%,transparent)}
.hero-grid{position:relative;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.25fr);gap:clamp(32px,5vw,72px);align-items:center}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.hero-fig{margin:0}
.hero-fig figcaption{font-size:14px;color:var(--muted);text-align:center;margin-top:16px}

/* device */
.device{background:#1b1f1e;border-radius:26px;padding:clamp(7px,1.1vw,13px);box-shadow:0 2px 4px rgba(0,0,0,.06),0 24px 60px -18px rgba(28,35,33,.35),0 50px 90px -40px rgba(29,107,98,.35)}
.device img{border-radius:16px;width:100%}
.device-lg{transform:none}

/* sections */
.section{padding:clamp(64px,9vw,120px) 0}
.tint{background:var(--paper-2)}
.section-head{max-width:720px;margin:0 0 clamp(36px,5vw,64px)}
.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:32px 28px}
.step-n{display:grid;place-items:center;width:42px;height:42px;border-radius:50%;background:var(--teal);color:#fff;font:600 19px var(--serif);margin-bottom:20px}
.step h3{margin-bottom:10px;font-size:26px}
.step p{margin:0;color:var(--muted);font-size:16px}

.feature{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:clamp(32px,5vw,72px);align-items:center}
.feature+.feature{margin-top:clamp(64px,9vw,120px)}
.feature.flip{grid-template-columns:minmax(0,1fr) minmax(0,1.3fr)}
.feature.flip .feature-media{order:2}
.feature-text h3,.feature-text h2{margin-bottom:16px}
.feature-text p{color:var(--muted);margin:0 0 18px}
.pair{display:grid;gap:18px}
.pair .device:nth-child(2){margin-left:10%}
.ticks{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.ticks li{position:relative;padding-left:30px;font-size:16px}
.ticks li::before{content:"";position:absolute;left:2px;top:.5em;width:12px;height:7px;border-left:2.5px solid var(--teal);border-bottom:2.5px solid var(--teal);transform:rotate(-45deg)}

.learn{background:linear-gradient(180deg,var(--paper) 0,#e3efec 100%)}
.learn .device{box-shadow:0 24px 60px -18px rgba(21,79,73,.45)}

.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:28px 24px}
.card h3{font-size:22px;margin-bottom:10px}
.card p{margin:0;color:var(--muted);font-size:15.5px}

.faq details{background:#fff;border:1px solid var(--line);border-radius:14px;margin-bottom:12px;padding:0 24px}
.faq summary{cursor:pointer;list-style:none;padding:20px 28px 20px 0;font:500 20px/1.3 var(--serif);position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:0;top:50%;transform:translateY(-50%);font:400 28px var(--sans);color:var(--teal)}
.faq details[open] summary::after{content:"–"}
.faq p{margin:0 0 22px;color:var(--muted)}

.final{background:var(--teal);color:#fff;text-align:center;padding:clamp(64px,9vw,110px) 0}
.final h2{color:#fff;max-width:18em;margin:0 auto 16px}
.final p{margin:0 auto 30px;color:rgba(255,255,255,.88);max-width:30em}

.site-footer{padding:36px 0;font-size:14.5px;color:var(--muted)}
.foot{display:flex;flex-wrap:wrap;gap:16px 32px;justify-content:space-between;align-items:center}
.foot p{margin:0;max-width:40em}
.foot nav{display:flex;gap:22px}
.foot a{color:var(--ink)}

/* reveal */
.js .reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease}
.js .reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1!important;transform:none!important;transition:none!important}
  .btn{transition:none}
}

/* responsive */
@media (max-width:1000px){
  .nav{display:none}
  .site-header .btn{margin-left:auto}
  .hero-grid,.feature,.feature.flip{grid-template-columns:1fr}
  .feature.flip .feature-media{order:0}
  .steps{grid-template-columns:1fr}
  .cards{grid-template-columns:repeat(2,1fr)}
  .device-lg{transform:none}
}
@media (max-width:560px){
  body{font-size:16px}
  .cards{grid-template-columns:1fr}
  .brand-sub{display:none}
  .pair .device:nth-child(2){margin-left:0}
  .device{border-radius:18px}
  .device img{border-radius:10px}
  .btn{padding:13px 22px}
  .cta-row .btn{flex:1 1 100%}
  .foot{flex-direction:column;align-items:flex-start}
}
/* Drei Bilder nebeneinander (Zeichen-Listen) */
.shots3{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(16px,2.4vw,32px);margin:0 0 clamp(32px,4vw,56px)}
.shots3 figure{margin:0}
.shots3 .device{border-radius:18px}
.shots3 .device img{border-radius:11px}
.shots3 figcaption{margin-top:14px;font-size:.95rem;color:var(--muted);line-height:1.5}
@media (max-width:1100px){.shots3{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.shots3{grid-template-columns:1fr;max-width:560px}}
.brand-icon{width:32px;height:32px;border-radius:8px;margin-right:2px;align-self:center;box-shadow:0 1px 3px rgba(0,0,0,.12)}
/* Leiste der Homepage teach-apps.de (Optik wie dort: weiß, Logo mit Verlauf blau→grün) */
.ta-bar{background:#fff;border-bottom:1px solid #e2e8f0;box-shadow:0 1px 2px rgba(15,23,42,.05)}
.ta-inner{max-width:1280px;margin:0 auto;padding:0 clamp(16px,3vw,32px);height:64px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.ta-logo{display:flex;align-items:center;gap:8px;text-decoration:none}
.ta-mark{width:40px;height:40px;border-radius:8px;background:linear-gradient(135deg,#3b82f6,#10b981);display:grid;place-items:center;box-shadow:0 4px 6px -1px rgba(0,0,0,.1)}
.ta-mark svg{width:24px;height:24px;fill:none;stroke:#fff;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.ta-name{font-family:Inter,system-ui,sans-serif;font-size:20px;font-weight:700;background:linear-gradient(90deg,#2563eb,#059669);-webkit-background-clip:text;background-clip:text;color:transparent}
.ta-links{display:flex;gap:4px}
.ta-links a{font-family:Inter,system-ui,sans-serif;font-size:15px;font-weight:500;color:#334155;text-decoration:none;padding:8px 12px;border-radius:8px}
.ta-links a:hover{background:#f1f5f9}
@media (max-width:420px){.ta-name{font-size:17px}.ta-links a{padding:8px 8px;font-size:14px}}