*{box-sizing:border-box}
:root{
  --text:#101828;--muted:#667085;--card:rgba(255,255,255,.88);--border:rgba(255,255,255,.55);
  --shadow:0 22px 55px rgba(46,35,90,.18);--blue:#2563eb;--purple:#7c3aed;--pink:#ec4899;
  --orange:#f97316;--green:#10b981;--red:#ef4444;--yellow:#f59e0b;--soft:#f8fafc;
}
body.dark{
  --text:#f8fafc;--muted:#cbd5e1;--card:rgba(15,23,42,.86);--border:rgba(148,163,184,.22);
  --shadow:0 22px 55px rgba(0,0,0,.35);--soft:#111827;
}
body{margin:0;min-height:100vh;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--text);
  background:radial-gradient(circle at 12% 8%,rgba(236,72,153,.28),transparent 24rem),
  radial-gradient(circle at 88% 10%,rgba(37,99,235,.28),transparent 24rem),
  radial-gradient(circle at 70% 90%,rgba(16,185,129,.22),transparent 22rem),
  linear-gradient(135deg,#fdf2f8,#eef2ff 45%,#ecfeff)}
body.dark{background:radial-gradient(circle at 12% 8%,rgba(124,58,237,.25),transparent 24rem),
  radial-gradient(circle at 88% 10%,rgba(37,99,235,.22),transparent 24rem),linear-gradient(135deg,#020617,#111827 55%,#0f172a)}
.phone-bg{position:fixed;inset:auto -80px -120px auto;width:360px;height:360px;background:linear-gradient(135deg,rgba(124,58,237,.22),rgba(236,72,153,.20));filter:blur(8px);border-radius:40% 60% 45% 55%;pointer-events:none}
.app-shell{max-width:1180px;margin:0 auto;padding:18px}
.hero{position:relative;overflow:hidden;border-radius:32px;padding:24px;color:white;background:linear-gradient(135deg,rgba(91,33,182,.96),rgba(37,99,235,.92) 48%,rgba(236,72,153,.86));box-shadow:var(--shadow)}
.hero:before{content:"";position:absolute;width:280px;height:280px;right:-80px;top:-90px;border-radius:50%;background:rgba(255,255,255,.18)}
.hero-top,.hero-stats{position:relative;display:flex;justify-content:space-between;align-items:center;gap:14px}.top-actions{display:flex;gap:10px}
.app-logo{width:54px;height:54px;display:grid;place-items:center;border-radius:18px;background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.26);font-weight:950;letter-spacing:.04em}
.install{background:white;color:#5b21b6;box-shadow:none}
.badge{display:inline-flex;margin-top:26px;padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.25);font-weight:850;font-size:.82rem}
.hero h1{margin:14px 0 8px;font-size:clamp(2.1rem,5vw,4rem);line-height:.95;letter-spacing:-.05em}.hero p{max-width:650px;margin:0;color:rgba(255,255,255,.84);font-size:1.06rem}
.hero-stats{justify-content:flex-start;flex-wrap:wrap;margin-top:24px}.hero-stats div{min-width:138px;padding:14px 16px;border-radius:22px;background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.22);backdrop-filter:blur(14px)}.hero-stats strong{display:block;font-size:1.55rem}.hero-stats span{display:block;color:rgba(255,255,255,.78);margin-top:2px}
.layout{display:grid;grid-template-columns:310px 1fr;gap:18px;margin-top:18px}.control-card,.quiz-card,.stats-card,.analytics-card{background:var(--card);border:1px solid var(--border);border-radius:28px;box-shadow:var(--shadow);backdrop-filter:blur(18px)}.control-card{padding:20px;align-self:start}.quiz-card{padding:26px;min-height:560px}
.section-title{display:flex;justify-content:space-between;align-items:end;margin-bottom:16px}.section-title span{font-size:1.25rem;font-weight:950}.section-title small{color:var(--muted);font-weight:800}.section-title.small span{font-size:1rem}
.segmented{display:grid;grid-template-columns:repeat(5,1fr);gap:6px;padding:6px;background:rgba(241,245,249,.85);border-radius:18px;border:1px solid rgba(148,163,184,.28)}
body.dark .segmented{background:rgba(15,23,42,.85)}
.segmented button{padding:10px 7px;border-radius:13px;background:transparent;color:#475569;box-shadow:none;font-size:.82rem}body.dark .segmented button{color:#cbd5e1}.segmented button.active{background:linear-gradient(135deg,var(--purple),var(--blue));color:white;box-shadow:0 10px 18px rgba(37,99,235,.24)}
.select-card{display:block;margin-top:18px;padding:14px;border-radius:22px;background:linear-gradient(180deg,rgba(255,255,255,.96),rgba(248,250,252,.92));border:1px solid rgba(148,163,184,.22);font-weight:900}body.dark .select-card{background:rgba(15,23,42,.85)}
.select-card span{display:block;color:var(--muted);font-size:.82rem;margin-bottom:7px}
select,textarea,input{width:100%;border:0;outline:0;background:transparent;color:var(--text);font:inherit;font-weight:800}input[type=number]{padding:10px;border-radius:14px;background:var(--soft);border:1px solid rgba(148,163,184,.24)}
.exam-options{margin-top:18px;padding:14px;border-radius:22px;background:rgba(255,255,255,.56);border:1px solid rgba(148,163,184,.20)}body.dark .exam-options{background:rgba(15,23,42,.45)}
.exam-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.exam-grid label{font-weight:850;color:var(--muted);font-size:.85rem}.exam-start{width:100%;margin-top:12px;background:linear-gradient(135deg,#10b981,#06b6d4)}
.quick-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:16px}.quick-actions .danger{grid-column:1/3}
button{border:0;border-radius:16px;padding:12px 14px;font-weight:950;cursor:pointer;color:white;background:linear-gradient(135deg,var(--purple),var(--blue));box-shadow:0 12px 24px rgba(37,99,235,.22);transition:.15s transform,.15s opacity}button:hover{transform:translateY(-1px);opacity:.96}button.secondary{background:linear-gradient(135deg,#06b6d4,#3b82f6)}button.danger{background:linear-gradient(135deg,#fb7185,#ef4444)}
.question-top{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}.question-id{display:inline-flex;padding:7px 11px;border-radius:999px;color:#1d4ed8;background:#dbeafe;font-weight:950}.question-type{margin-top:8px;color:var(--muted);font-weight:850}.favorite{width:52px;height:52px;display:grid;place-items:center;padding:0;border-radius:18px;color:#f59e0b;font-size:1.8rem;background:linear-gradient(180deg,#fff7ed,#fffbeb);border:1px solid rgba(245,158,11,.22);box-shadow:0 12px 22px rgba(245,158,11,.13)}
.progress-bar{height:10px;background:#e2e8f0;border-radius:999px;overflow:hidden;margin:22px 0}.progress-bar div{height:100%;width:0%;border-radius:999px;background:linear-gradient(90deg,var(--pink),var(--purple),var(--blue),#06b6d4);transition:width .22s ease}
#questionText{font-size:clamp(1.38rem,2.3vw,2.08rem);line-height:1.28;margin:0 0 22px;letter-spacing:-.025em}.answers{display:grid;gap:12px}.answer{position:relative;display:grid;grid-template-columns:34px 1fr;gap:12px;align-items:flex-start;padding:16px;border-radius:22px;background:linear-gradient(180deg,#ffffff,#f8fafc);border:1px solid rgba(148,163,184,.24);cursor:pointer;transition:.15s transform,.15s border,.15s box-shadow}body.dark .answer{background:rgba(15,23,42,.72)}
.answer:hover{transform:translateY(-2px);border-color:#93c5fd;box-shadow:0 14px 26px rgba(37,99,235,.12)}.answer input{width:22px;height:22px;margin-top:2px;accent-color:#7c3aed}.answer.correct{background:linear-gradient(180deg,#ecfdf5,#d1fae5);border-color:#34d399;color:#064e3b}.answer.wrong{background:linear-gradient(180deg,#fff1f2,#fee2e2);border-color:#fb7185;color:#7f1d1d}
.free-text-label{display:block;font-weight:950;margin-top:12px}textarea{min-height:120px;margin-top:10px;padding:14px;border-radius:22px;background:#fff;border:1px solid rgba(148,163,184,.26);font-weight:600}body.dark textarea{background:rgba(15,23,42,.75)}
.feedback{margin:16px 0 0;padding:14px 16px;border-radius:20px;font-weight:950}.feedback.success{background:#d1fae5;color:#047857}.feedback.danger{background:#fee2e2;color:#b91c1c}.feedback.warn{background:#fef3c7;color:#a16207}
.solution{margin-top:16px;padding:18px;border-radius:24px;background:linear-gradient(180deg,#fff,#f8fafc);border:1px solid rgba(148,163,184,.24)}body.dark .solution{background:rgba(15,23,42,.75)}.solution h3{margin:0 0 10px}.solution ul{margin:0;padding-left:22px}
.bottom-nav{position:sticky;bottom:12px;margin-top:22px;padding:10px;display:grid;grid-template-columns:54px 1fr 54px 54px;gap:10px;border-radius:24px;background:rgba(255,255,255,.78);border:1px solid rgba(255,255,255,.72);backdrop-filter:blur(18px);box-shadow:0 18px 42px rgba(46,35,90,.16)}body.dark .bottom-nav{background:rgba(15,23,42,.72);border-color:rgba(148,163,184,.25)}.round{width:54px;height:54px;padding:0;border-radius:19px;font-size:1.3rem}.primary-action{background:linear-gradient(135deg,var(--green),#06b6d4)}.solution-btn{background:linear-gradient(135deg,#f59e0b,#f97316)}
.stats-card{grid-column:1/3;display:grid;grid-template-columns:repeat(4,1fr);gap:12px;padding:14px}.mini-stat{padding:18px;border-radius:24px;color:white}.mini-stat strong{display:block;font-size:2rem}.mini-stat span{display:block;opacity:.85;font-weight:800}.mini-stat.total{background:linear-gradient(135deg,#6366f1,#2563eb)}.mini-stat.good{background:linear-gradient(135deg,#10b981,#059669)}.mini-stat.bad{background:linear-gradient(135deg,#fb7185,#ef4444)}.mini-stat.hard{background:linear-gradient(135deg,#f59e0b,#f97316)}
.analytics-card{grid-column:1/3;padding:20px}.chapter-row{margin:12px 0}.chapter-head{display:flex;justify-content:space-between;gap:10px;font-weight:850}.chapter-bar{height:10px;background:rgba(148,163,184,.25);border-radius:999px;overflow:hidden;margin-top:6px}.chapter-bar div{height:100%;background:linear-gradient(90deg,#10b981,#06b6d4);border-radius:999px}.hidden{display:none!important}
@media(max-width:880px){.app-shell{padding:12px}.hero{border-radius:26px;padding:20px}.layout{grid-template-columns:1fr}.stats-card,.analytics-card{grid-column:auto}.bottom-nav{grid-template-columns:48px 1fr 48px 48px}.round{width:48px;height:48px}.segmented{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.hero-stats,.stats-card{grid-template-columns:1fr 1fr}.quick-actions{grid-template-columns:1fr}.quick-actions .danger{grid-column:auto}}


.source-footer{
  padding:22px 4px 30px;
  color:var(--muted);
}
.footer-card{
  background:var(--card);
  border:1px solid var(--border);
  box-shadow:var(--shadow);
  border-radius:24px;
  padding:18px 20px;
  max-width:1180px;
  margin:0 auto;
  backdrop-filter:blur(18px);
}
.footer-card h3{
  margin:0 0 10px;
  color:var(--text);
  font-size:1.05rem;
}
.footer-card p{
  margin:8px 0;
  line-height:1.5;
  font-size:.92rem;
}
.footer-card a{
  color:#2563eb;
  font-weight:900;
  text-decoration:none;
}
.footer-card a:hover{
  text-decoration:underline;
}
body.dark .footer-card a{
  color:#93c5fd;
}


/* Mobile-Fix: Frage bleibt im Fokus */
@media(max-width:880px){
  .layout{
    display:flex;
    flex-direction:column;
  }

  .quiz-card{
    order:1;
    min-height:auto;
    padding:18px;
    scroll-margin-top:10px;
  }

  .control-card{
    order:2;
  }

  .stats-card{
    order:3;
  }

  .analytics-card{
    order:4;
  }

  .hero{
    padding:16px;
  }

  .hero h1{
    font-size:2rem;
  }

  .hero p{
    font-size:.95rem;
  }

  .hero-stats{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:8px;
  }

  .hero-stats div{
    min-width:0;
    padding:10px;
  }

  .hero-stats strong{
    font-size:1.05rem;
  }

  .hero-stats span{
    font-size:.75rem;
  }

  .bottom-nav{
    position:fixed;
    left:12px;
    right:12px;
    bottom:12px;
    z-index:50;
  }

  .quiz-card{
    padding-bottom:92px;
  }

  #questionText{
    margin-top:4px;
  }
}

@media(max-width:520px){
  .hero-stats{
    grid-template-columns:repeat(3,1fr);
  }

  .question-top{
    position:sticky;
    top:0;
    z-index:20;
    padding:8px 0;
    background:var(--card);
    backdrop-filter:blur(18px);
    border-radius:18px;
  }

  .answers{
    gap:10px;
  }

  .answer{
    padding:14px;
  }
}


/* Kompakter Header / Hero */

.hero{
  padding:18px 22px;
  border-radius:24px;
}

.hero-content{
  margin-top:6px;
}

.badge{
  margin-top:4px;
  padding:5px 10px;
  font-size:.72rem;
}

.hero h1{
  margin:8px 0 4px;
  font-size:clamp(1.6rem,3vw,2.5rem);
  line-height:1;
}

.hero p{
  margin:0;
  font-size:.92rem;
  max-width:520px;
  opacity:.9;
}

.hero-stats{
  margin-top:14px;
  gap:8px;
}

.hero-stats div{
  padding:10px 12px;
  border-radius:16px;
  min-width:110px;
}

.hero-stats strong{
  font-size:1.1rem;
}

.hero-stats span{
  font-size:.74rem;
}

.app-logo{
  width:42px;
  height:42px;
  border-radius:14px;
  font-size:.9rem;
}

.install{
  padding:10px 12px;
  border-radius:14px;
  font-size:.82rem;
}

.top-actions{
  gap:8px;
}

/* Mobile extrem kompakt */

@media(max-width:880px){

  .hero{
    padding:12px 14px;
    border-radius:20px;
  }

  .hero-top{
    align-items:center;
  }

  .hero-content{
    margin-top:2px;
  }

  .badge{
    display:none;
  }

  .hero h1{
    font-size:1.35rem;
    margin:4px 0 2px;
  }

  .hero p{
    font-size:.78rem;
    line-height:1.25;
    max-width:none;
  }

  .hero-stats{
    margin-top:10px;
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:6px;
  }

  .hero-stats div{
    padding:7px 8px;
    border-radius:14px;
  }

  .hero-stats strong{
    font-size:.9rem;
  }

  .hero-stats span{
    font-size:.66rem;
  }

  .app-logo{
    width:36px;
    height:36px;
    border-radius:12px;
    font-size:.75rem;
  }

  .install{
    padding:8px 10px;
    border-radius:12px;
    font-size:.75rem;
  }
}

/* Sehr kleine Geräte */

@media(max-width:520px){

  .hero{
    padding:10px 12px;
  }

  .hero p{
    display:none;
  }

  .hero-stats{
    margin-top:8px;
  }

  .hero-stats div{
    padding:6px;
  }

  .hero-stats strong{
    font-size:.82rem;
  }

  .hero-stats span{
    font-size:.62rem;
  }
}


/* Mobile: oberen Hero-Bereich vollständig entfernen */
@media(max-width:880px){

  .hero,
  .hero-card,
  .top-header,
  .header,
  .hero-wrapper{
    display:none !important;
    height:0 !important;
    margin:0 !important;
    padding:0 !important;
    overflow:hidden !important;
  }

  body{
    padding-top:8px !important;
  }

  .layout{
    margin-top:0 !important;
    padding-top:0 !important;
  }

  .quiz-card{
    margin-top:0 !important;
    padding-top:14px !important;
    min-height:calc(100vh - 90px);
  }

  .question-top{
    position:sticky;
    top:0;
    z-index:30;
    background:var(--card);
    padding-top:4px;
  }
}


/* Entfernt leeren Zwischenraum in der Fragenbox */
@media(max-width:880px){

  .quiz-card{
    display:flex;
    flex-direction:column;
    justify-content:flex-start !important;
    min-height:auto !important;
    height:auto !important;
    padding-bottom:92px !important;
  }

  .answers{
    margin-bottom:14px !important;
  }

  .bottom-nav{
    position:sticky !important;
    bottom:0;
    margin-top:10px !important;
    background:rgba(255,255,255,0.92);
    backdrop-filter:blur(12px);
  }

  .question-container,
  .question-content{
    flex:0 0 auto !important;
  }

  .quiz-card::after{
    display:none !important;
    content:none !important;
  }
}