/* ============ Tempo-Trainer · Styles ============ */
:root{
  --bg1:#eef1ff; --bg2:#f6f0ff; --card:#ffffff;
  --ink:#2b2d42; --ink-soft:#5b5f7a; --muted:#8b8fad;
  --primary:#6c5ce7; --primary-dark:#5a48d6; --primary-soft:#efeaff;
  --good:#16b67a; --good-soft:#e3f8ef;
  --bad:#ff5d6c; --bad-soft:#ffe9eb;
  --warn:#ff9f1c; --warn-soft:#fff3df;
  --line:#e7e8f2;
  --shadow:0 10px 30px rgba(60,50,140,.12);
  --shadow-sm:0 4px 14px rgba(60,50,140,.10);
  --r-lg:26px; --r-md:18px; --r-sm:12px;
  --train:#5a48d6;
  font-size:17px;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
[hidden]{display:none !important}
html,body{margin:0;padding:0}
body{
  font-family:'Nunito',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  color:var(--ink);
  background:linear-gradient(160deg,var(--bg1),var(--bg2));
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,.q-tag,.lc-title,.big-score{font-family:'Baloo 2',cursive}
b,strong{font-weight:800;color:var(--ink)}

/* ---- Topbar ---- */
.topbar{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.85);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.topbar-inner{max-width:760px;margin:0 auto;display:flex;align-items:center;gap:10px;padding:10px 14px}
.icon-btn{border:none;background:var(--primary-soft);width:42px;height:42px;border-radius:50%;font-size:1.2rem;cursor:pointer;transition:transform .15s, background .15s;display:grid;place-items:center;flex:0 0 auto}
.icon-btn:active{transform:scale(.9)}
.icon-btn:hover{background:#e4ddff}
.progress-wrap{flex:1;min-width:0}
.progress-track{height:12px;background:#e8e6f7;border-radius:99px;overflow:hidden}
.progress-fill{height:100%;width:0%;background:linear-gradient(90deg,#7d6bff,#9b8bff);border-radius:99px;transition:width .4s cubic-bezier(.2,.8,.2,1)}
.progress-label{font-size:.74rem;color:var(--muted);font-weight:700;margin-top:3px;text-align:center}
.score-chip{background:var(--warn-soft);color:#c97a00;font-weight:800;border-radius:99px;padding:7px 12px;font-size:.95rem;white-space:nowrap}

/* ---- Layout ---- */
#app{max-width:760px;margin:0 auto;padding:18px 16px 60px}
.screen{animation:fade .35s ease}
@keyframes fade{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.card{background:var(--card);border-radius:var(--r-lg);box-shadow:var(--shadow);padding:22px}

/* ---- Startbildschirm ---- */
.hero-card{background:var(--card);border-radius:var(--r-lg);box-shadow:var(--shadow);padding:30px 24px;text-align:center;margin-top:14px}
.hero-emoji{font-size:3rem;line-height:1}
.hero-card h1{margin:.3em 0 0;font-size:2.4rem;color:var(--primary)}
.subtitle{margin:.1em 0 0;font-weight:800;letter-spacing:.5px;color:var(--ink-soft);text-transform:uppercase;font-size:.85rem}
.lead{color:var(--ink-soft);margin:1.1em auto 0;max-width:420px;line-height:1.5}
.pick-title{font-weight:800;margin:1.6em 0 .7em;color:var(--ink)}
.level-cards{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.level-card{border:2px solid var(--line);background:#fbfbff;border-radius:var(--r-md);padding:16px 12px;cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:4px;transition:transform .15s,border-color .15s,box-shadow .15s;text-align:center}
.level-card:hover{border-color:var(--primary);box-shadow:var(--shadow-sm);transform:translateY(-2px)}
.level-card:active{transform:scale(.97)}
.lc-emoji{font-size:1.8rem}
.lc-title{font-size:1.15rem;color:var(--primary-dark)}
.lc-desc{font-size:.8rem;color:var(--muted);line-height:1.3;font-weight:600}
.hint-line{font-size:.85rem;color:var(--muted);margin-top:1.6em}

/* ---- Profi-Karte ---- */
.level-card.lc-hot{border-color:#ffd0c2;background:linear-gradient(180deg,#fff5f1,#fff)}
.level-card.lc-hot:hover{border-color:#ff7043}
.level-card.lc-hot .lc-title{color:#e8551f}

/* ---- Frage ---- */
.question-card{margin-top:8px}
.q-head{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.q-tag{display:inline-block;background:var(--primary-soft);color:var(--primary-dark);font-weight:700;font-size:.8rem;padding:5px 12px;border-radius:99px}
.q-level{font-weight:800;font-size:.72rem;padding:4px 10px;border-radius:99px;text-transform:uppercase;letter-spacing:.3px}
.q-level.l1{background:var(--good-soft);color:#0c7a4f}
.q-level.l2{background:var(--warn-soft);color:#c97a00}
.q-level.l3{background:var(--bad-soft);color:#c0303d}
.q-text{font-size:1.22rem;line-height:1.5;font-weight:700;color:var(--ink)}
.q-text .num{color:var(--primary-dark);font-weight:800;white-space:nowrap}
.q-figure{margin:16px 0 4px}
.q-figure:empty{display:none}

/* Antwortbereich */
.answer-area{margin-top:18px}
.answer-row{display:flex;flex-wrap:wrap;gap:10px;align-items:stretch;margin-bottom:14px}
.input-pill{display:flex;align-items:center;background:#f4f4fb;border:2px solid var(--line);border-radius:14px;padding:0 4px 0 14px;flex:1;min-width:150px;transition:border-color .15s,background .15s}
.input-pill:focus-within{border-color:var(--primary);background:#fff}
.input-pill input{border:none;background:transparent;font-size:1.3rem;font-weight:800;font-family:'Baloo 2';color:var(--ink);padding:14px 6px;width:100%;outline:none;min-width:0}
.input-pill .unit{font-weight:800;color:var(--ink-soft);padding:0 10px 0 4px;white-space:nowrap;font-size:1.05rem}
.input-pill.shake{animation:shake .4s}
@keyframes shake{0%,100%{transform:translateX(0)}20%{transform:translateX(-7px)}40%{transform:translateX(7px)}60%{transform:translateX(-5px)}80%{transform:translateX(5px)}}

/* Multiple-Choice */
.choices{display:grid;gap:10px;width:100%}
.choice{border:2px solid var(--line);background:#fbfbff;border-radius:14px;padding:14px 16px;font-weight:700;font-size:1.05rem;cursor:pointer;text-align:left;transition:border-color .15s,background .15s,transform .1s;color:var(--ink)}
.choice:hover{border-color:var(--primary)}
.choice:active{transform:scale(.98)}
.choice.selected{border-color:var(--primary);background:var(--primary-soft)}
.choice.correct{border-color:var(--good);background:var(--good-soft);color:#0c7a4f}
.choice.wrong{border-color:var(--bad);background:var(--bad-soft);color:#c0303d}
.choice.disabled{pointer-events:none;opacity:.85}

/* Buttons */
.btn{border:none;border-radius:14px;font-family:'Nunito';font-weight:800;font-size:1.05rem;padding:14px 20px;cursor:pointer;transition:transform .12s,box-shadow .15s,background .15s}
.btn:active{transform:scale(.97)}
.btn-primary{background:linear-gradient(180deg,#7a68ff,var(--primary));color:#fff;box-shadow:0 6px 16px rgba(108,92,231,.4);width:100%}
.btn-primary:hover{box-shadow:0 8px 22px rgba(108,92,231,.5)}
.btn-ghost{background:#f1f1f9;color:var(--ink-soft)}
.btn-ghost:hover{background:#e9e9f5}
.btn-good{background:linear-gradient(180deg,#27c98a,var(--good));color:#fff;box-shadow:0 6px 16px rgba(22,182,122,.4);width:100%}
.tools-row{display:flex;gap:10px;margin-top:12px}
.tools-row .btn{flex:1;font-size:.95rem;padding:11px}

/* Tipp-Box */
.hint-box{margin-top:14px;background:var(--warn-soft);border:1.5px dashed var(--warn);border-radius:14px;padding:14px 16px;color:#9a6200;font-weight:600;line-height:1.5;animation:fade .3s}
.hint-box b{color:#7a4d00}

/* ---- Feedback / Erklärung ---- */
.feedback{margin-top:16px;animation:fade .3s}
.feedback-head{display:flex;align-items:center;gap:12px;border-radius:var(--r-md);padding:16px 18px;font-weight:800;font-size:1.15rem;box-shadow:var(--shadow-sm)}
.feedback-head .fh-emoji{font-size:1.7rem}
.feedback-head.ok{background:var(--good-soft);color:#0c7a4f}
.feedback-head.no{background:var(--bad-soft);color:#c0303d}
.feedback-head .fh-sub{display:block;font-size:.85rem;font-weight:700;opacity:.85;margin-top:2px}

.explain{margin-top:14px}
.explain:empty{display:none}
.expl-card{background:var(--card);border-radius:var(--r-md);box-shadow:var(--shadow-sm);padding:18px;border:1px solid var(--line)}
.expl-title{font-weight:800;color:var(--primary-dark);margin-bottom:10px;display:flex;align-items:center;gap:8px;font-size:1.05rem}
.steps{display:flex;flex-direction:column;gap:10px}
.step{display:flex;gap:12px;align-items:flex-start;padding:12px 14px;background:#f8f8fe;border-radius:14px;border:1px solid var(--line);opacity:0;transform:translateY(6px);transition:opacity .35s,transform .35s}
.step.show{opacity:1;transform:none}
.step-num{flex:0 0 auto;width:28px;height:28px;border-radius:50%;background:var(--primary);color:#fff;font-weight:800;display:grid;place-items:center;font-size:.9rem}
.step-body{flex:1;line-height:1.5;font-weight:600;color:var(--ink-soft);padding-top:2px}
.step-body .calc{display:inline-block;background:#fff;border:1.5px solid var(--line);border-radius:9px;padding:4px 9px;font-family:'Baloo 2';font-weight:700;color:var(--ink);margin:3px 4px 0 0;font-size:1.05rem}
.step-body .res{color:var(--good);font-weight:800}
.step-reveal{margin-top:14px;text-align:center}
.step-reveal .btn{padding:11px 22px;width:auto}

/* Formel-Dreieck */
.triangle-wrap{display:flex;flex-direction:column;align-items:center;gap:8px;margin:6px 0}
.tri-hint{font-size:.85rem;color:var(--muted);font-weight:700;text-align:center}
.formula-tri{width:200px;height:auto;cursor:pointer;user-select:none}
.formula-tri .tri-cell{transition:fill .2s}
.formula-tri .tri-var{font-family:'Baloo 2';font-weight:800;font-size:34px;fill:var(--ink)}
.formula-tri .tri-var.dim{fill:#c7c8dd}
.formula-tri .tri-var.want{fill:var(--primary)}
.formula-tri .op{font-family:'Baloo 2';font-weight:800;font-size:26px;fill:var(--muted)}
.tri-result{font-family:'Baloo 2';font-weight:800;font-size:1.4rem;color:var(--primary-dark);background:var(--primary-soft);padding:6px 18px;border-radius:12px}

/* Umrechnungs-Visual */
.convert-vis{display:flex;align-items:center;justify-content:center;gap:8px;flex-wrap:wrap;margin:10px 0}
.cv-box{background:#fff;border:2px solid var(--line);border-radius:14px;padding:12px 16px;text-align:center;min-width:96px}
.cv-box .cv-val{font-family:'Baloo 2';font-weight:800;font-size:1.5rem;color:var(--ink)}
.cv-box .cv-unit{font-size:.8rem;color:var(--muted);font-weight:700}
.cv-box.from{border-color:#bcd0ff;background:#eef4ff}
.cv-box.to{border-color:#bde7d4;background:var(--good-soft)}
.cv-arrow{display:flex;flex-direction:column;align-items:center;color:var(--primary-dark);font-weight:800}
.cv-arrow .cv-op{background:var(--primary);color:#fff;border-radius:99px;padding:4px 12px;font-size:.95rem;font-family:'Baloo 2'}
.cv-arrow .cv-tip{font-size:1.4rem;line-height:.6}

/* SVG-Strecken-Animation */
.track-svg{width:100%;height:auto;display:block;background:#f8f8fe;border-radius:14px;border:1px solid var(--line)}
.track-controls{display:flex;gap:10px;justify-content:center;align-items:center;margin-top:10px;flex-wrap:wrap}
.track-controls .btn{width:auto;padding:10px 18px}
.track-readout{font-weight:800;color:var(--primary-dark);background:var(--primary-soft);padding:8px 14px;border-radius:12px;font-size:.95rem}

/* Diagramm */
.graph-svg{width:100%;height:auto;background:#fff;border:1px solid var(--line);border-radius:14px}

/* Feedback-Aktionen */
.feedback-actions{margin-top:16px;display:flex;gap:10px}
.feedback-actions .btn{flex:1}

/* ---- Ergebnis ---- */
.result-screen{position:relative}
.confetti{position:fixed;inset:0;width:100%;height:100%;pointer-events:none;z-index:5}
.result-card{text-align:center;position:relative;z-index:10;margin-top:10px}
.result-emoji{font-size:3.4rem}
.result-card h2{font-size:2rem;margin:.1em 0 .4em;color:var(--primary)}
.result-score{display:flex;align-items:center;justify-content:center;gap:22px;margin:14px 0}
.big-score{display:flex;flex-direction:column;line-height:1}
.big-score span:first-child{font-size:3.2rem;color:var(--primary-dark)}
.big-score .of{font-size:.95rem;color:var(--muted);font-weight:700;font-family:'Nunito'}
.result-ring-wrap{position:relative;width:120px;height:120px}
.ring{width:120px;height:120px;transform:rotate(-90deg)}
.ring-bg{fill:none;stroke:#ece9fb;stroke-width:11}
.ring-fg{fill:none;stroke:url(#g);stroke:var(--primary);stroke-width:11;stroke-linecap:round;stroke-dasharray:326.7;stroke-dashoffset:326.7;transition:stroke-dashoffset 1.1s cubic-bezier(.2,.8,.2,1)}
.ring-percent{position:absolute;inset:0;display:grid;place-items:center;font-family:'Baloo 2';font-weight:800;font-size:1.5rem;color:var(--primary-dark)}
.result-msg{color:var(--ink-soft);font-weight:700;line-height:1.5;max-width:440px;margin:6px auto 0}
.result-stats{display:flex;justify-content:center;gap:14px;margin:22px 0}
.stat{background:#f7f7fd;border-radius:16px;padding:14px 10px;flex:1;max-width:130px;border:1px solid var(--line)}
.stat-num{display:block;font-family:'Baloo 2';font-weight:800;font-size:1.8rem;color:var(--primary-dark)}
.stat-lbl{font-size:.78rem;color:var(--muted);font-weight:700}
.result-buttons{display:flex;flex-direction:column;gap:10px;margin-top:8px}

/* ---- Spickzettel ---- */
.sheet-overlay{position:fixed;inset:0;background:rgba(43,45,66,.5);backdrop-filter:blur(3px);z-index:50;display:flex;align-items:flex-end;justify-content:center;animation:fade .25s}
.sheet{background:var(--card);border-radius:24px 24px 0 0;width:100%;max-width:560px;max-height:88vh;overflow-y:auto;padding:24px 22px 36px;position:relative;box-shadow:0 -10px 40px rgba(0,0,0,.2);animation:slideup .3s cubic-bezier(.2,.8,.2,1)}
@keyframes slideup{from{transform:translateY(100%)}to{transform:none}}
.sheet h3{margin:0 0 14px;color:var(--primary);font-size:1.4rem}
.sheet-close{position:absolute;top:16px;right:16px;border:none;background:#f1f1f9;width:38px;height:38px;border-radius:50%;font-size:1.1rem;cursor:pointer;color:var(--ink-soft)}
.cheat-block{background:#f8f8fe;border:1px solid var(--line);border-radius:16px;padding:16px;margin-bottom:14px}
.cheat-block h4{margin:0 0 8px;color:var(--primary-dark);font-size:1.05rem}
.cheat-block p{margin:6px 0;line-height:1.55;color:var(--ink-soft);font-weight:600}
.cheat-block .kf{background:#fff;border:1.5px solid var(--line);border-radius:9px;padding:3px 9px;font-family:'Baloo 2';font-weight:800;color:var(--primary-dark);display:inline-block;margin:2px}

/* ---- Fragen-Übersicht ---- */
.nav-hint{color:var(--ink-soft);font-weight:600;line-height:1.5;margin:.2em 0 1em}
.nav-legend{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:14px;font-size:.8rem;font-weight:700;color:var(--muted)}
.nav-legend span{display:flex;align-items:center;gap:6px}
.lg{width:14px;height:14px;border-radius:5px;display:inline-block;border:2px solid var(--line)}
.lg-done{background:var(--good);border-color:var(--good)}
.lg-try{background:var(--warn);border-color:var(--warn)}
.lg-cur{background:#fff;border-color:var(--primary);box-shadow:0 0 0 2px var(--primary-soft)}
.lg-todo{background:#f1f1f9}
.nav-group{margin-bottom:16px}
.nav-group h4{margin:0 0 9px;font-size:.95rem;display:flex;align-items:center;gap:7px}
.nav-group h4 .gcount{font-size:.75rem;color:var(--muted);font-weight:700}
.nav-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(46px,1fr));gap:8px}
.nav-chip{aspect-ratio:1;border:2px solid var(--line);background:#fbfbff;border-radius:12px;font-weight:800;font-family:'Baloo 2';font-size:1.05rem;color:var(--ink-soft);cursor:pointer;display:grid;place-items:center;transition:transform .1s,border-color .15s;position:relative}
.nav-chip:hover{border-color:var(--primary)}
.nav-chip:active{transform:scale(.92)}
.nav-chip.done{background:var(--good-soft);border-color:var(--good);color:#0c7a4f}
.nav-chip.try{background:var(--warn-soft);border-color:var(--warn);color:#c97a00}
.nav-chip.cur{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft);color:var(--primary-dark)}
.nav-lvl-dot{position:absolute;top:3px;right:4px;font-size:.5rem}

/* Responsiv */
@media (min-width:560px){
  :root{font-size:18px}
  .feedback-actions{justify-content:flex-end}
}
@media (max-width:380px){
  .level-cards{grid-template-columns:1fr}
  .result-score{flex-direction:column;gap:10px}
}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}