:root{
  --bg:#f4f2ec;--surface:#fff;--surface2:#efede6;--ink:#17212b;--muted:#5b6a77;--line:#dad6c9;
  --accent:#0f766e;--accent-ink:#fff;--accent-soft:#d6eee8;--accent-strong:#0b5a54;
  --ok:#15803d;--ok-soft:#dcf3e3;--bad:#b42318;--bad-soft:#fbe3e0;--warn:#a85a06;--warn-soft:#faeacb;
  --t0:#d32f2f;--t1:#1d5fd6;--t2:#1e8a3e;--t3:#b57d00;
  --shadow:0 1px 2px rgba(20,30,40,.06),0 6px 20px rgba(20,30,40,.06);
  --r:16px;--r-sm:10px;--nav-h:66px;--font:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
:root[data-theme=dark]{
  --bg:#0e1317;--surface:#161d23;--surface2:#1d262d;--ink:#e7ecf0;--muted:#9aa9b6;--line:#2b3741;
  --accent:#2dd4bf;--accent-ink:#04201c;--accent-soft:#12332f;--accent-strong:#5eead4;
  --ok:#4ade80;--ok-soft:#12301d;--bad:#ff8a80;--bad-soft:#3a1714;--warn:#fbbf24;--warn-soft:#3a2b0a;
  --t0:#ff6b6b;--t1:#6aa4ff;--t2:#4ade80;--t3:#facc15;--shadow:0 1px 2px rgba(0,0,0,.4),0 6px 20px rgba(0,0,0,.35);
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme=light]){
    --bg:#0e1317;--surface:#161d23;--surface2:#1d262d;--ink:#e7ecf0;--muted:#9aa9b6;--line:#2b3741;
    --accent:#2dd4bf;--accent-ink:#04201c;--accent-soft:#12332f;--accent-strong:#5eead4;
    --ok:#4ade80;--ok-soft:#12301d;--bad:#ff8a80;--bad-soft:#3a1714;--warn:#fbbf24;--warn-soft:#3a2b0a;
    --t0:#ff6b6b;--t1:#6aa4ff;--t2:#4ade80;--t3:#facc15;--shadow:0 1px 2px rgba(0,0,0,.4),0 6px 20px rgba(0,0,0,.35);
  }
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.55 var(--font);-webkit-tap-highlight-color:transparent;overflow-wrap:anywhere}
h1,h2,h3{line-height:1.2;letter-spacing:-.01em;margin:0 0 .5em}
h1{font-size:1.65rem}h2{font-size:1.25rem}h3{font-size:1.05rem}
p{margin:0 0 .8em}
a{color:var(--accent-strong)}
code{font-family:var(--mono);font-size:.9em;background:var(--surface2);padding:.1em .35em;border-radius:6px}
pre{background:var(--surface2);padding:12px;border-radius:var(--r-sm);overflow:auto;font-family:var(--mono);font-size:.9rem}
pre code{background:none;padding:0}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:8px}
button,input,select,textarea{font:inherit;color:inherit}
[hidden]{display:none!important}

/* ---------- Layout ---------- */
.app{min-height:100dvh;display:grid;grid-template-columns:minmax(0,1fr)}
.nav{position:fixed;z-index:30;left:0;right:0;bottom:0;display:flex;justify-content:space-around;
  background:var(--surface);border-top:1px solid var(--line);
  height:calc(var(--nav-h) + env(safe-area-inset-bottom));padding:0 4px env(safe-area-inset-bottom)}
.nav .brand{display:none}
.nav a{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;min-width:0;
  color:var(--muted);text-decoration:none;font-size:.72rem;font-weight:600;border-radius:12px;margin:6px 2px}
.nav a svg{width:24px;height:24px;flex:none}
.nav a[aria-current=page]{color:var(--accent-strong);background:var(--accent-soft)}
.col{min-width:0;display:flex;flex-direction:column;min-height:100dvh}
.topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:8px;padding:10px 16px;
  padding-top:calc(10px + env(safe-area-inset-top));background:color-mix(in srgb,var(--bg) 88%,transparent);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid transparent}
.topbar .title{font-weight:700;letter-spacing:-.01em;flex:1;display:flex;align-items:center;gap:8px}
.logo{width:28px;height:28px;border-radius:8px;background:var(--accent);color:var(--accent-ink);display:grid;place-items:center;flex:none}
.logo svg{width:18px;height:18px}
.iconbtn{width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:var(--surface);display:grid;place-items:center;cursor:pointer;color:var(--ink)}
.iconbtn svg{width:22px;height:22px}
.avatar{font-weight:700;background:var(--accent);color:var(--accent-ink);border:0}
main{width:100%;max-width:1000px;margin:0 auto;padding:8px 16px calc(var(--nav-h) + 40px + env(safe-area-inset-bottom));flex:1}
@media (min-width:700px){
  .app{grid-template-columns:88px minmax(0,1fr)}
  .nav{position:sticky;top:0;height:100dvh;flex-direction:column;justify-content:flex-start;gap:4px;
    border-top:0;border-right:1px solid var(--line);padding:16px 8px}
  .nav a{flex:none;width:100%;margin:0;padding:10px 4px;font-size:.72rem}
  .topbar{padding-left:28px;padding-right:28px}
  main{padding:12px 28px 56px}
}
@media (min-width:1024px){
  .app{grid-template-columns:256px minmax(0,1fr)}
  .nav{padding:20px 14px;align-items:stretch}
  .nav .brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.05rem;padding:4px 10px 18px}
  .nav a{flex-direction:row;justify-content:flex-start;gap:12px;padding:12px 14px;font-size:.98rem;margin:0}
  .topbar .title .logo{display:none}
  main{padding:16px 40px 64px}
}

/* ---------- Bausteine ---------- */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px;box-shadow:var(--shadow);margin-bottom:16px}
.card.flat{box-shadow:none}
.grid{display:grid;gap:16px}
@media (min-width:700px){.grid.c2{grid-template-columns:1fr 1fr}.grid.c3{grid-template-columns:repeat(3,1fr)}}
@media (min-width:1024px){.grid.c4{grid-template-columns:repeat(4,1fr)}}
.grid>.card{margin:0}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.row.between{justify-content:space-between}
.stack>*+*{margin-top:12px}
.muted{color:var(--muted)}.small{font-size:.875rem}.big{font-size:2rem;font-weight:800;letter-spacing:-.02em}
.tnum{font-variant-numeric:tabular-nums}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 20px;border-radius:12px;
  border:1px solid var(--line);background:var(--surface);font-weight:650;cursor:pointer;text-decoration:none;color:var(--ink)}
.btn:hover{background:var(--surface2)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn.primary:hover{filter:brightness(1.08);background:var(--accent)}
.btn.danger{color:var(--bad);border-color:color-mix(in srgb,var(--bad) 40%,var(--line))}
.btn.sm{min-height:40px;padding:0 14px;font-size:.92rem}
.btn.block{width:100%}
.btn[disabled]{opacity:.5;cursor:not-allowed}
.chip{display:inline-flex;align-items:center;gap:6px;padding:3px 10px;border-radius:99px;font-size:.78rem;font-weight:650;background:var(--surface2);color:var(--muted);white-space:nowrap}
.chip.ok{background:var(--ok-soft);color:var(--ok)}.chip.bad{background:var(--bad-soft);color:var(--bad)}
.chip.warn{background:var(--warn-soft);color:var(--warn)}.chip.acc{background:var(--accent-soft);color:var(--accent-strong)}
.seg{display:flex;flex-wrap:wrap;gap:6px}
.seg button{min-height:44px;padding:0 14px;border-radius:12px;border:1px solid var(--line);background:var(--surface);cursor:pointer;font-weight:600}
.seg button[aria-pressed=true]{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
label.field{display:block;font-weight:650;font-size:.9rem;margin-bottom:6px}
input[type=text],input[type=number],input[type=search],select,textarea{width:100%;min-height:48px;padding:10px 14px;border-radius:12px;
  border:1.5px solid var(--line);background:var(--surface);font-size:1rem}
textarea{min-height:130px;resize:vertical;line-height:1.5}
input:focus,select:focus,textarea:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 25%,transparent)}
.bar{height:10px;border-radius:99px;background:var(--surface2);overflow:hidden}
.bar>i{display:block;height:100%;background:var(--accent);border-radius:99px;transition:width .4s ease}
.bar.ok>i{background:var(--ok)}.bar.warn>i{background:var(--warn)}.bar.bad>i{background:var(--bad)}
.bar.thick{height:14px}
.toast{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(var(--nav-h) + 20px + env(safe-area-inset-bottom));z-index:60;
  background:var(--ink);color:var(--bg);padding:12px 18px;border-radius:12px;max-width:min(92vw,520px);box-shadow:var(--shadow);font-weight:600}
@media (min-width:700px){.toast{bottom:24px}}
.toast.err{background:var(--bad);color:#fff}
dialog{border:0;border-radius:var(--r);padding:0;max-width:min(94vw,720px);width:100%;background:var(--surface);color:var(--ink);box-shadow:0 20px 60px rgba(0,0,0,.35)}
dialog::backdrop{background:rgba(10,15,20,.55)}
dialog .dlg{padding:20px}
dialog textarea{font-family:var(--mono);font-size:.85rem;min-height:320px}
table{width:100%;border-collapse:collapse;font-size:.92rem}
th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-size:.78rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}
.tablewrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
.empty{text-align:center;padding:36px 12px;color:var(--muted)}
.pagehead{margin:8px 0 18px}
.pagehead p{color:var(--muted);margin:0}
.spinner{width:28px;height:28px;border-radius:50%;border:3px solid var(--line);border-top-color:var(--accent);animation:spin .8s linear infinite;margin:40px auto}
@keyframes spin{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){*{animation-duration:.01ms!important;transition-duration:.01ms!important}}

/* ---------- Markdown ---------- */
.md h2{font-size:1.2rem;margin:1.4em 0 .5em}.md h3{font-size:1.05rem;margin:1.2em 0 .4em}
.md h2:first-child,.md h3:first-child{margin-top:0}
.md ul,.md ol{padding-left:1.3em;margin:0 0 .9em}.md li{margin:.2em 0}
.md blockquote{margin:0 0 .9em;padding:10px 14px;border-left:4px solid var(--accent);background:var(--accent-soft);border-radius:0 10px 10px 0}
.md table{margin:0 0 1em;display:block;overflow-x:auto}
.md th{background:var(--surface2)}
.md p:last-child{margin-bottom:0}

/* ---------- Dashboard ---------- */
.hero{background:linear-gradient(135deg,var(--accent) 0%,color-mix(in srgb,var(--accent) 55%,#0b2a5a) 100%);color:var(--accent-ink);border:0;position:relative;overflow:hidden}
:root[data-theme=dark] .hero{color:#fff}
.hero h1{margin-bottom:.2em}
.hero .btn{background:rgba(255,255,255,.95);color:#0b3b37;border-color:transparent}
.hero .btn.ghost{background:rgba(255,255,255,.16);color:inherit;border-color:rgba(255,255,255,.35)}
.kpi{display:flex;flex-direction:column;gap:2px}
.kpi b{font-size:1.8rem;letter-spacing:-.02em;line-height:1.1}
.activity{display:flex;align-items:flex-end;gap:5px;height:90px}
.activity div{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;gap:4px;height:100%}
.activity i{display:block;width:100%;max-width:22px;min-height:3px;background:var(--accent);border-radius:5px 5px 2px 2px;opacity:.85}
.activity i.zero{background:var(--line);opacity:1}
.activity span{font-size:.65rem;color:var(--muted)}
.arealine{display:grid;gap:6px}

/* ---------- Fragen ---------- */
.qhead{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:12px}
.qprompt{font-size:1.12rem;font-weight:600;margin-bottom:16px}
.options{display:grid;gap:10px;margin-bottom:16px}
.opt{display:flex;gap:12px;align-items:flex-start;padding:14px;border:2px solid var(--line);border-radius:14px;background:var(--surface);cursor:pointer;min-height:54px}
.opt:hover{border-color:color-mix(in srgb,var(--accent) 50%,var(--line))}
.opt input{position:absolute;opacity:0;pointer-events:none}
.opt .key{flex:none;width:30px;height:30px;border-radius:9px;background:var(--surface2);display:grid;place-items:center;font-weight:800;font-size:.85rem}
.opt.multi .key{border-radius:50%}
.opt:has(input:checked){border-color:var(--accent);background:var(--accent-soft)}
.opt:has(input:checked) .key{background:var(--accent);color:var(--accent-ink)}
.opt:has(input:focus-visible){outline:3px solid var(--accent);outline-offset:2px}
.opt.correct{border-color:var(--ok)!important;background:var(--ok-soft)!important}
.opt.correct .key{background:var(--ok)!important;color:#fff}
.opt.wrong{border-color:var(--bad)!important;background:var(--bad-soft)!important}
.opt.wrong .key{background:var(--bad)!important;color:#fff}
.opt.locked{cursor:default}
.opt .txt{flex:1;padding-top:3px}
.fields{display:grid;gap:12px;margin-bottom:16px}
.fieldrow{display:grid;gap:6px}
.fieldrow .inwrap{display:flex;gap:8px;align-items:center}
.fieldrow .unit{color:var(--muted);font-weight:600;white-space:nowrap}
.fieldrow input.ok{border-color:var(--ok);background:var(--ok-soft)}
.fieldrow input.bad{border-color:var(--bad);background:var(--bad-soft)}
.fieldrow .expect{font-size:.88rem;color:var(--ok);font-weight:650}
.feedback{border-radius:14px;padding:14px 16px;margin:4px 0 16px;border:1px solid var(--line);background:var(--surface2)}
.feedback.ok{background:var(--ok-soft);border-color:color-mix(in srgb,var(--ok) 40%,transparent)}
.feedback.part{background:var(--warn-soft);border-color:color-mix(in srgb,var(--warn) 40%,transparent)}
.feedback.bad{background:var(--bad-soft);border-color:color-mix(in srgb,var(--bad) 40%,transparent)}
.feedback h3{margin:0 0 4px}
.model{border-left:4px solid var(--accent);background:var(--surface2);padding:12px 14px;border-radius:0 12px 12px 0;margin-bottom:14px}
.rubric{display:grid;gap:10px;margin-bottom:14px}
.ritem{border:1px solid var(--line);border-radius:12px;padding:10px 12px;background:var(--surface)}
.ritem .rt{margin-bottom:8px}
.tri{display:grid;grid-template-columns:repeat(3,1fr);gap:6px}
.tri button{min-height:44px;border-radius:10px;border:1.5px solid var(--line);background:var(--surface);cursor:pointer;font-weight:650;font-size:.9rem}
.tri button[aria-pressed=true][data-v="0"]{background:var(--bad-soft);border-color:var(--bad);color:var(--bad)}
.tri button[aria-pressed=true][data-v="0.5"]{background:var(--warn-soft);border-color:var(--warn);color:var(--warn)}
.tri button[aria-pressed=true][data-v="1"]{background:var(--ok-soft);border-color:var(--ok);color:var(--ok)}
.selfcorr{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-top:8px}
.sticky-actions{position:sticky;bottom:calc(var(--nav-h) + 8px + env(safe-area-inset-bottom));z-index:10}
@media (min-width:700px){.sticky-actions{bottom:12px}}
.actions{display:flex;gap:10px;flex-wrap:wrap}
.actions .btn{flex:1 1 160px}

/* ---------- Wiki ---------- */
.wlist{display:grid;gap:10px}
.wi{display:flex;gap:12px;align-items:center;justify-content:space-between;padding:14px 16px;border:1px solid var(--line);border-radius:14px;background:var(--surface);text-decoration:none;color:inherit}
.wi:hover{border-color:var(--accent)}
.wi .meta{display:flex;gap:6px;flex-wrap:wrap;justify-content:flex-end}
.article{max-width:760px}

/* ---------- Prüfung ---------- */
.examtimer{position:sticky;top:60px;z-index:15;display:flex;align-items:center;justify-content:space-between;gap:12px;background:var(--surface);
  border:1px solid var(--line);border-radius:14px;padding:10px 14px;box-shadow:var(--shadow);margin-bottom:16px}
.examtimer .time{font-size:1.4rem;font-weight:800;font-variant-numeric:tabular-nums}
.examtimer.low .time{color:var(--bad)}
.gradebox{text-align:center;padding:24px 12px}
.gradebox .g{font-size:4rem;font-weight:800;line-height:1;color:var(--accent-strong)}
details.qres{border:1px solid var(--line);border-radius:12px;margin-bottom:8px;background:var(--surface)}
details.qres summary{padding:12px 14px;cursor:pointer;display:flex;gap:10px;align-items:center;justify-content:space-between;min-height:48px;list-style:none}
details.qres summary::-webkit-details-marker{display:none}
details.qres .inner{padding:0 14px 14px}

/* ---------- Teamquiz ---------- */
.roomcode{font-size:clamp(2.6rem,12vw,4.5rem);font-weight:900;letter-spacing:.18em;font-family:var(--mono);text-align:center;color:var(--accent-strong);margin:0}
.teams{display:grid;gap:12px}
@media (min-width:700px){.teams{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.teams.n3,.teams.n4{grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}}
.team{border:2px solid var(--line);border-top-width:8px;border-radius:14px;padding:12px 14px;background:var(--surface)}
.team.t0{border-color:var(--t0)}.team.t1{border-color:var(--t1)}.team.t2{border-color:var(--t2)}.team.t3{border-color:var(--t3)}
.team h3{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}
.team ul{list-style:none;margin:0;padding:0}.team li{padding:3px 0}
.team li.me{font-weight:800}
.qtimer{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.qtimer .bar{flex:1;height:14px}
.qtimer .bar>i{transition:none}
.qtimer b{font-size:1.5rem;min-width:2.2ch;text-align:right;font-variant-numeric:tabular-nums}
.qopts{display:grid;gap:12px}
@media (min-width:700px){.qopts{grid-template-columns:1fr 1fr}}
.qopt{display:flex;gap:12px;align-items:center;min-height:68px;padding:14px 16px;text-align:left;border-radius:16px;border:2px solid var(--line);background:var(--surface);cursor:pointer;font-weight:650;font-size:1.05rem;position:relative}
.qopt .key{flex:none;width:36px;height:36px;border-radius:10px;display:grid;place-items:center;font-weight:900;background:var(--surface2)}
.qopt.sel{border-color:var(--accent);background:var(--accent-soft)}
.qopt.correct{border-color:var(--ok);background:var(--ok-soft)}
.qopt.wrong{border-color:var(--bad);background:var(--bad-soft)}
.qopt.dim{opacity:.55}
.qopt .dist{margin-left:auto;font-variant-numeric:tabular-nums;font-weight:800}
.qopt[disabled]{cursor:default}
.board{counter-reset:r}
.board li{display:flex;gap:10px;align-items:center;padding:10px 12px;border-radius:12px;margin-bottom:6px;background:var(--surface2);list-style:none}
.board li::before{counter-increment:r;content:counter(r);font-weight:800;width:1.6em;text-align:center;color:var(--muted)}
.board li .nm{flex:1}.board li.me{outline:2px solid var(--accent)}
.board ol{padding:0;margin:0}
.dot{width:12px;height:12px;border-radius:50%;flex:none}
.dot.t0{background:var(--t0)}.dot.t1{background:var(--t1)}.dot.t2{background:var(--t2)}.dot.t3{background:var(--t3)}
.podium{display:grid;gap:10px}
.podium .pt{display:flex;align-items:center;gap:12px;padding:14px 16px;border-radius:14px;border:2px solid var(--line);background:var(--surface)}
.podium .pt:first-child{border-color:var(--accent);background:var(--accent-soft)}
.podium .pt b.place{font-size:1.6rem;width:1.6em;text-align:center}
.pts-pop{font-size:1.6rem;font-weight:900;color:var(--ok)}
.login{min-height:100dvh;display:grid;place-items:center;padding:24px}
.login .card{max-width:420px;width:100%;text-align:center}
.login .logo{width:56px;height:56px;border-radius:16px;margin:0 auto 16px}
.login .logo svg{width:32px;height:32px}
input.codein{font-family:var(--mono);font-size:2rem;font-weight:800;letter-spacing:.3em;text-align:center;min-height:68px;text-transform:uppercase}
.grid{margin-bottom:16px}
.sechead{margin:24px 0 12px}
.grid.kpis{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
.grid.kpis .card{padding:12px 14px}
.kpi b{font-size:1.45rem}
@media (min-width:700px){.grid.kpis{gap:16px}.grid.kpis .card{padding:18px}.kpi b{font-size:1.8rem}}
.md td,.md th,table td,table th{overflow-wrap:normal;word-break:normal}
.md th{white-space:nowrap}
.actions{margin-top:12px}
.feedback+.selfcorr{margin-bottom:4px}
.qopt .dist{white-space:nowrap}
.podium{margin-bottom:20px}
.podium .pt>div{flex:1;min-width:0}
h2+.board,.board{margin-top:8px}
.mdimg{max-width:100%;height:auto;border:1px solid var(--line);border-radius:10px;background:#fff;display:block;margin:8px 0}
.srcline{margin-top:12px;padding-top:10px;border-top:1px dashed var(--line)}