:root{
  --bg:#0e1116; --card:#171c24; --card2:#1f2630; --fg:#e7edf3; --muted:#8a97a6;
  --acc:#19c37d; --acc2:#0ea5e9; --warn:#f59e0b; --bad:#ef4444; --line:#2a323d;
  --r:14px;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{background:var(--bg);color:var(--fg);font:16px/1.5 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  -webkit-tap-highlight-color:transparent}
#app{max-width:680px;margin:0 auto;padding:16px 16px 90px;min-height:100%}
.center{display:flex;align-items:center;justify-content:center;min-height:60vh;text-align:center}
.muted{color:var(--muted)}
h1,h2,h3{margin:.2em 0 .5em}
h1{font-size:1.5rem}
button{font:inherit;cursor:pointer;border:0;border-radius:12px;padding:14px 16px;color:#fff;background:var(--card2)}
button:active{transform:translateY(1px)}
.btn-acc{background:var(--acc)} .btn-acc2{background:var(--acc2)} .btn-ghost{background:var(--card2);color:var(--fg)}
.btn-bad{background:var(--bad)} .btn-warn{background:var(--warn)}
.row{display:flex;gap:10px;flex-wrap:wrap}
.row>*{flex:1}
input,textarea,select{width:100%;background:var(--card);color:var(--fg);border:1px solid var(--line);
  border-radius:10px;padding:12px;font:inherit}
textarea{min-height:80px;resize:vertical}
label{display:block;margin:10px 0 4px;color:var(--muted);font-size:.85rem}

/* Header */
.appbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.appbar .badge{background:var(--card2);padding:6px 10px;border-radius:999px;font-size:.8rem}
.offline-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--acc);margin-right:6px}
.offline .offline-dot{background:var(--warn)}

/* Tiles */
.tiles{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:8px}
.tile{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px;text-align:left}
.tile h3{margin:0 0 4px;font-size:1.05rem}
.tile p{margin:0;color:var(--muted);font-size:.85rem}
.tile .big{font-size:1.8rem;font-weight:700;color:var(--acc)}

/* Flashcard */
.fcard{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px;min-height:240px;
  display:flex;flex-direction:column;justify-content:center;margin:10px 0}
.fcard .q{font-size:1.25rem;font-weight:600}
.fcard .a{margin-top:16px;padding-top:16px;border-top:1px dashed var(--line);font-size:1.1rem;white-space:pre-wrap}
.fcard .topic{color:var(--muted);font-size:.8rem;margin-bottom:10px}
.fcard .cardimg{display:block;max-width:100%;max-height:300px;margin:0 auto 12px;border-radius:8px;background:#fff}
.grade{display:grid;grid-template-columns:1fr 1fr 1fr 1fr;gap:8px}
.grade button{padding:16px 6px;font-size:.9rem}
.progress{height:6px;background:var(--card2);border-radius:99px;overflow:hidden;margin:6px 0 12px}
.progress>i{display:block;height:100%;background:var(--acc)}

/* List */
.item{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px;margin-bottom:10px}
.pill{display:inline-block;background:var(--card2);border-radius:999px;padding:2px 8px;font-size:.72rem;color:var(--muted)}
.bar{height:10px;background:var(--card2);border-radius:99px;overflow:hidden;margin-top:6px}
.bar>i{display:block;height:100%}
.flex{display:flex;gap:10px;align-items:center;justify-content:space-between}

/* Bottom nav */
.nav{position:fixed;left:0;right:0;bottom:0;background:#11161d;border-top:1px solid var(--line);
  display:flex;justify-content:space-around;padding:8px 4px env(safe-area-inset-bottom)}
.nav button{background:none;color:var(--muted);font-size:.72rem;display:flex;flex-direction:column;align-items:center;gap:2px;padding:6px 10px;border-radius:10px}
.nav button.active{color:var(--acc)}
.nav .ic{font-size:1.25rem}

.toast{position:fixed;left:50%;bottom:80px;transform:translateX(-50%) translateY(20px);background:#000a;
  border:1px solid var(--line);padding:10px 16px;border-radius:10px;opacity:0;transition:.25s;pointer-events:none;z-index:50}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.spin{width:28px;height:28px;border:3px solid var(--line);border-top-color:var(--acc);border-radius:50%;animation:s 1s linear infinite;margin:20px auto}
@keyframes s{to{transform:rotate(360deg)}}

/* Aktiv-Antwort-Modus */
.modetog{background:var(--card2);color:var(--fg);font-size:.82rem;padding:7px 12px;border-radius:999px}
.kw{display:inline-block;border-radius:999px;padding:4px 10px;margin:0 4px 6px 0;font-size:.84rem;border:1px solid var(--line)}
.kw.hit{background:rgba(25,195,125,.16);color:#7ff0c0;border-color:rgba(25,195,125,.4)}
.kw.miss{background:rgba(239,68,68,.14);color:#ffb4b4;border-color:rgba(239,68,68,.4)}
.grade button.suggested{outline:3px solid #fff;outline-offset:-3px;font-weight:700}
#micBtn.rec{background:var(--bad);animation:pulse 1s infinite}
@keyframes pulse{50%{opacity:.55}}