/* AP2-Lernportal – Styles. Farben nur über Tokens (Hell/Dunkel). */
:root {
  --bg: #f5f6f9;
  --surface: #ffffff;
  --surface-2: #f0f2f7;
  --surface-3: #e6e9f1;
  --text: #1b1f2a;
  --muted: #5e6678;
  --border: #d9dde7;
  --accent: #2f5bd3;
  --accent-2: #1e3f9e;
  --accent-soft: #e3eaff;
  --ok: #17803d;
  --ok-soft: #dcf5e4;
  --bad: #c62f2f;
  --bad-soft: #fde4e4;
  --warn: #b56a00;
  --warn-soft: #fff0d6;
  --ai: #7c3aed;
  --ai-soft: #efe7ff;
  --c1: #2f5bd3; --c2: #0e9384; --c3: #d97706; --c4: #9333ea; --c5: #db2777; --c6: #65a30d;
  --shadow: 0 1px 2px rgba(20, 30, 60, .06), 0 4px 16px rgba(20, 30, 60, .06);
  --radius: 12px;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", "JetBrains Mono", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --side-w: 270px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #10131a; --surface: #171b24; --surface-2: #1e2330; --surface-3: #272d3d; --text: #e7eaf2; --muted: #9aa3b8;
    --border: #2d3446; --accent: #6d93ff; --accent-2: #9db6ff; --accent-soft: #1f2c52; --ok: #4ade80; --ok-soft: #133524;
    --bad: #f87171; --bad-soft: #3d1a1d; --warn: #fbbf24; --warn-soft: #3a2c0d; --ai: #b794ff; --ai-soft: #2a1f47;
    --c1: #6d93ff; --c2: #2dd4bf; --c3: #fbbf24; --c4: #c084fc; --c5: #f472b6; --c6: #a3e635;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 4px 16px rgba(0, 0, 0, .25);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #10131a; --surface: #171b24; --surface-2: #1e2330; --surface-3: #272d3d; --text: #e7eaf2; --muted: #9aa3b8;
  --border: #2d3446; --accent: #6d93ff; --accent-2: #9db6ff; --accent-soft: #1f2c52; --ok: #4ade80; --ok-soft: #133524;
  --bad: #f87171; --bad-soft: #3d1a1d; --warn: #fbbf24; --warn-soft: #3a2c0d; --ai: #b794ff; --ai-soft: #2a1f47;
  --c1: #6d93ff; --c2: #2dd4bf; --c3: #fbbf24; --c4: #c084fc; --c5: #f472b6; --c6: #a3e635;
  --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 4px 16px rgba(0, 0, 0, .25);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--bg); color: var(--text); font: 16px/1.55 var(--sans); -webkit-font-smoothing: antialiased; }
a { color: var(--accent); }
img { max-width: 100%; }
code, pre, .mono { font-family: var(--mono); font-size: .9em; }
code { background: var(--surface-2); border: 1px solid var(--border); border-radius: 5px; padding: 0 .3em; }
pre { background: var(--surface-2); border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px; overflow-x: auto; white-space: pre; }
pre code { background: none; border: 0; padding: 0; }
h1, h2, h3, h4, h5 { line-height: 1.25; margin: 0 0 .5em; }
h1 { font-size: 1.7rem; }
h2 { font-size: 1.3rem; }
h3 { font-size: 1.1rem; }
h4 { font-size: 1rem; }
hr { border: 0; border-top: 1px solid var(--border); margin: 20px 0; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--accent); color: #fff; padding: 8px 12px; z-index: 100; border-radius: 6px; }
.skip:focus { left: 8px; }
[hidden] { display: none !important; }

/* ---------- Layout */
.layout { display: flex; min-height: 100vh; }
.sidebar {
  width: var(--side-w); flex: none; background: var(--surface); border-right: 1px solid var(--border);
  position: sticky; top: 0; height: 100vh; overflow-y: auto; display: flex; flex-direction: column; padding: 14px 10px;
}
.content { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.topbar {
  position: sticky; top: 0; z-index: 20; display: flex; align-items: center; gap: 10px;
  padding: 10px 24px; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--border);
}
.topbar-right { margin-left: auto; display: flex; align-items: center; gap: 10px; }
main { padding: 24px; max-width: 1180px; width: 100%; margin: 0 auto; }
main:focus { outline: none; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); padding: 4px 8px 14px; }
.brand small { display: block; color: var(--muted); font-size: 12px; }
.logo { width: 38px; height: 38px; border-radius: 10px; background: var(--accent); color: #fff; display: grid; place-items: center; font-weight: 800; font-size: 14px; letter-spacing: .5px; }
.mainnav a, .side-topics a {
  display: flex; align-items: center; gap: 10px; padding: 8px 10px; border-radius: 8px; color: var(--text); text-decoration: none; font-size: 15px;
}
.mainnav a:hover, .side-topics a:hover { background: var(--surface-2); }
.mainnav a.active, .side-topics a.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.mainnav .ico { width: 20px; text-align: center; }
.mainnav .count { margin-left: auto; font-size: 12px; background: var(--bad-soft); color: var(--bad); border-radius: 999px; padding: 0 8px; font-weight: 600; }
.side-section { margin-top: 14px; border-top: 1px solid var(--border); padding-top: 10px; flex: 1; }
.side-title { font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); padding: 0 10px 6px; }
.side-topics a { font-size: 13.5px; padding: 5px 10px; gap: 8px; }
.side-topics .num { font-family: var(--mono); font-size: 12px; color: var(--muted); width: 20px; }
.side-topics .t { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--border); flex: none; }
.dot.todo { background: var(--bad); }
.dot.unsicher { background: var(--warn); }
.dot.sitzt { background: var(--ok); }
.side-foot { font-size: 12px; color: var(--muted); padding: 10px; border-top: 1px solid var(--border); }
.menu-btn { display: none; }
.scrim { display: none; }
.crumbs { font-size: 14px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; min-width: 0; }
.crumbs a { color: var(--muted); text-decoration: none; }
.crumbs a:hover { color: var(--accent); }
.sync { font-size: 12px; color: var(--muted); display: flex; align-items: center; gap: 6px; }
.sync::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--ok); }
.sync.off::before { background: var(--warn); }
.profile-btn {
  display: flex; align-items: center; gap: 8px; border: 1px solid var(--border); background: var(--surface); color: var(--text);
  border-radius: 999px; padding: 4px 12px 4px 4px; cursor: pointer; font: inherit; font-size: 14px;
}
.avatar { width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center; color: #fff; font-weight: 700; font-size: 13px; flex: none; }

@media (max-width: 900px) {
  .sidebar { position: fixed; left: 0; top: 0; z-index: 50; transform: translateX(-100%); transition: transform .2s; box-shadow: var(--shadow); }
  body.nav-open .sidebar { transform: none; }
  body.nav-open .scrim { display: block; position: fixed; inset: 0; background: rgba(0, 0, 0, .35); z-index: 40; }
  .menu-btn { display: inline-grid; }
  main { padding: 16px; }
  .topbar { padding: 8px 16px; }
  .sync span { display: none; }
  .profile-btn .pname { display: none; }
  .profile-btn { padding: 3px; }
}

/* ---------- Grundelemente */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px; border: 1px solid var(--border); background: var(--surface);
  color: var(--text); border-radius: 8px; padding: 8px 14px; font: inherit; font-size: 15px; cursor: pointer; text-decoration: none; line-height: 1.2;
  transition: background .12s, border-color .12s;
}
.btn:hover { background: var(--surface-2); }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-2); }
.btn.ghost { background: transparent; border-color: transparent; color: var(--muted); }
.btn.ghost:hover { background: var(--surface-2); color: var(--text); }
.btn.good { border-color: var(--ok); color: var(--ok); }
.btn.good:hover, .btn.good.on { background: var(--ok-soft); }
.btn.bad { border-color: var(--bad); color: var(--bad); }
.btn.bad:hover, .btn.bad.on { background: var(--bad-soft); }
.btn.ai { border-color: var(--ai); color: var(--ai); background: var(--ai-soft); font-weight: 600; }
.btn.ai:hover { filter: brightness(.97); }
.btn.small { padding: 4px 10px; font-size: 13px; }
.icon-btn { border: 0; background: transparent; color: var(--text); width: 34px; height: 34px; border-radius: 8px; cursor: pointer; font-size: 16px; display: inline-grid; place-items: center; }
.icon-btn:hover { background: var(--surface-2); }
.row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 10px 0; }
.row.center, .center { justify-content: center; text-align: center; }
.muted { color: var(--muted); }
.small { font-size: 13.5px; }
.error { color: var(--bad); }
.warn { color: var(--warn); }
.pill { display: inline-block; padding: 1px 9px; border-radius: 999px; font-size: 12.5px; font-weight: 600; background: var(--surface-2); color: var(--muted); border: 1px solid var(--border); }
.pill.ok { background: var(--ok-soft); color: var(--ok); border-color: transparent; }
.pill.bad { background: var(--bad-soft); color: var(--bad); border-color: transparent; }
.pill.warn { background: var(--warn-soft); color: var(--warn); border-color: transparent; }
.pill.ai { background: var(--ai-soft); color: var(--ai); border-color: transparent; }
.badge { font-size: 12px; padding: 2px 8px; border-radius: 999px; background: var(--surface-2); color: var(--muted); border: 1px solid var(--border); white-space: nowrap; }
.badge.ok { background: var(--ok-soft); color: var(--ok); border-color: transparent; }
.kbd { font-family: var(--mono); font-size: 12px; border: 1px solid var(--border); border-bottom-width: 2px; border-radius: 4px; padding: 0 5px; background: var(--surface); }
input[type=text], input[type=password], input[type=number], input[type=search], input[type=date], input:not([type]), select, textarea {
  font: inherit; color: var(--text); background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 7px 10px; max-width: 100%;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 0; border-color: var(--accent); }
input[type=range] { accent-color: var(--accent); }
input[type=checkbox], input[type=radio] { accent-color: var(--accent); width: 18px; height: 18px; vertical-align: middle; }
textarea { width: 100%; resize: vertical; line-height: 1.5; }
textarea.mono { font-family: var(--mono); font-size: 14px; tab-size: 2; }
label.field { display: block; margin: 12px 0; }
label.field > span { display: block; font-weight: 600; font-size: 14px; margin-bottom: 4px; }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 20px; box-shadow: var(--shadow); margin-bottom: 16px;
}
.grid { display: grid; gap: 14px; }
.cols2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 700px) { .cols2 { grid-template-columns: 1fr; } }
.seg { display: inline-flex; border: 1px solid var(--border); border-radius: 9px; overflow: hidden; flex-wrap: wrap; }
.seg button { border: 0; background: var(--surface); color: var(--text); padding: 6px 12px; font: inherit; font-size: 14px; cursor: pointer; border-right: 1px solid var(--border); }
.seg button:last-child { border-right: 0; }
.seg button.on { background: var(--accent); color: #fff; }
.chip {
  display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--border); background: var(--surface); color: var(--text);
  border-radius: 999px; padding: 5px 12px; font: inherit; font-size: 14px; cursor: pointer; margin: 3px;
}
.chip.sel, .chip.on { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); }
.empty { color: var(--muted); text-align: center; padding: 28px 10px; }
.tbl-wrap { overflow-x: auto; margin: 8px 0; }
.tbl { border-collapse: collapse; font-size: 14px; min-width: 50%; }
.tbl th, .tbl td { border: 1px solid var(--border); padding: 5px 9px; text-align: left; vertical-align: top; }
.tbl th { background: var(--surface-2); font-weight: 600; }
.tbl td.null { color: var(--muted); font-style: italic; }
.result { margin: 10px 0; padding: 8px 12px; border-radius: 8px; font-weight: 600; }
.result.ok { background: var(--ok-soft); color: var(--ok); }
.result.bad { background: var(--bad-soft); color: var(--bad); }
.explain { margin: 8px 0; padding: 10px 12px; border-left: 3px solid var(--accent); background: var(--surface-2); border-radius: 0 8px 8px 0; font-size: 15px; }
details { margin: 8px 0; }
details > summary { cursor: pointer; color: var(--accent); font-weight: 600; font-size: 14.5px; }
.solution { background: var(--surface-2); border-radius: 8px; padding: 8px 12px; }

/* ---------- Toasts / Lightbox */
#toasts { position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%); z-index: 200; display: flex; flex-direction: column; gap: 8px; align-items: center; }
.toast { background: var(--text); color: var(--bg); padding: 9px 16px; border-radius: 10px; box-shadow: var(--shadow); font-size: 14.5px; transition: opacity .4s; }
.toast.ok { background: var(--ok); color: #fff; }
.toast.bad { background: var(--bad); color: #fff; }
.toast.out { opacity: 0; }
.lightbox { border: 0; padding: 0; background: var(--surface); border-radius: 12px; max-width: 96vw; max-height: 94vh; }
.lightbox::backdrop { background: rgba(0, 0, 0, .7); }
.lightbox img { display: block; max-width: 94vw; max-height: 90vh; background: #fff; }
.lightbox .close { position: absolute; right: 6px; top: 6px; background: var(--surface); }

/* ---------- Markdown */
.md p { margin: .5em 0 .8em; }
.md ul, .md ol { padding-left: 1.4em; margin: .4em 0 .8em; }
.md li { margin: .2em 0; }
.md img { display: block; margin: 12px auto; border-radius: 8px; background: #fff; border: 1px solid var(--border); cursor: zoom-in; }
.md h3 { margin-top: 1em; }
.md table { border-collapse: collapse; margin: 10px 0; display: block; overflow-x: auto; }
.md th, .md td { border: 1px solid var(--border); padding: 5px 9px; }
.md th { background: var(--surface-2); }
.md blockquote { margin: 8px 0; padding: 6px 14px; border-left: 3px solid var(--border); color: var(--muted); }

/* ---------- Dashboard */
.hero { display: grid; grid-template-columns: 1fr auto; gap: 20px; align-items: center; }
.hero h1 { margin-bottom: 4px; }
.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin: 16px 0; }
.stat { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; }
.stat b { display: block; font-size: 1.6rem; line-height: 1.1; }
.stat span { color: var(--muted); font-size: 13.5px; }
.stat.bad b { color: var(--bad); } .stat.warn b { color: var(--warn); } .stat.ok b { color: var(--ok); }
@media (max-width: 700px) { .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); } .hero { grid-template-columns: 1fr; } .hero .ring { display: none; } }
.ring { width: 110px; height: 110px; }
.cluster { margin: 22px 0 8px; display: flex; align-items: baseline; gap: 10px; }
.cluster h2 { margin: 0; font-size: 1.05rem; }
.topic-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; }
.tcard {
  display: flex; flex-direction: column; gap: 8px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px 16px; text-decoration: none; color: var(--text); position: relative; transition: border-color .12s, transform .12s;
}
.tcard:hover { border-color: var(--accent); transform: translateY(-1px); }
.tcard .top { display: flex; align-items: center; gap: 8px; }
.tcard .nr { font-family: var(--mono); font-size: 13px; color: var(--muted); }
.tcard h3 { font-size: 15.5px; margin: 0; }
.tcard .meta { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; font-size: 12.5px; color: var(--muted); margin-top: auto; }
.tcard.st-todo { border-left: 4px solid var(--bad); }
.tcard.st-unsicher { border-left: 4px solid var(--warn); }
.tcard.st-sitzt { border-left: 4px solid var(--ok); }
.bar { height: 6px; background: var(--surface-3); border-radius: 99px; overflow: hidden; }
.bar > span { display: block; height: 100%; background: var(--accent); border-radius: 99px; transition: width .3s; }
.filters { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; margin: 10px 0; }
.filters input[type=search] { flex: 1; min-width: 180px; }

/* ---------- Thema */
.topic-head { display: flex; gap: 16px; align-items: flex-start; flex-wrap: wrap; }
.topic-head .titles { flex: 1; min-width: 260px; }
.topic-head .nr { font-family: var(--mono); color: var(--muted); }
.status-pick { display: flex; gap: 6px; flex-wrap: wrap; }
.status-pick button { border: 1px solid var(--border); background: var(--surface); color: var(--text); border-radius: 999px; padding: 5px 12px; font: inherit; font-size: 14px; cursor: pointer; }
.status-pick button.on.todo { background: var(--bad-soft); color: var(--bad); border-color: var(--bad); }
.status-pick button.on.unsicher { background: var(--warn-soft); color: var(--warn); border-color: var(--warn); }
.status-pick button.on.sitzt { background: var(--ok-soft); color: var(--ok); border-color: var(--ok); }
.lernziele { margin: 6px 0 0; padding-left: 1.2em; color: var(--muted); font-size: 14.5px; }
.tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--border); margin: 18px 0 16px; overflow-x: auto; scrollbar-width: thin; position: sticky; top: 55px; background: var(--bg); z-index: 10; }
.tabs a { padding: 10px 14px; text-decoration: none; color: var(--muted); border-bottom: 2px solid transparent; white-space: nowrap; font-size: 15px; display: flex; gap: 6px; align-items: center; }
.tabs a:hover { color: var(--text); }
.tabs a.active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }
.tabs .n { font-size: 11.5px; background: var(--surface-2); border-radius: 99px; padding: 0 7px; color: var(--muted); }
.section-card .sec-head { display: flex; align-items: flex-start; gap: 10px; flex-wrap: wrap; }
.section-card .sec-head h3 { flex: 1; margin: 0; min-width: 200px; }
.section-card.flag { border-left: 4px solid var(--bad); }
.section-card.done { border-left: 4px solid var(--ok); }
.sec-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.merk { background: var(--accent-soft); border: 1px solid transparent; }
.merk li { margin: 4px 0; font-weight: 500; }
.topic-nav { display: flex; justify-content: space-between; gap: 10px; margin: 26px 0 10px; flex-wrap: wrap; }
.inline-viz { margin-top: 14px; border-top: 1px dashed var(--border); padding-top: 12px; }
.inline-viz > summary { font-size: 15px; }

/* ---------- Visualisierungen */
.viz { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 18px; margin-bottom: 18px; box-shadow: var(--shadow); }
.viz > header h3 { margin: 0 0 2px; }
.viz > header p { margin: 0 0 10px; color: var(--muted); font-size: 14.5px; }
.viz-stage { border: 1px solid var(--border); border-radius: 10px; background: var(--bg); padding: 10px; margin: 10px 0; overflow-x: auto; }
.viz-stage svg { display: block; max-width: 100%; height: auto; }
.viz-stage svg text { font-family: var(--sans); }
.viz-info { background: var(--surface-2); border-radius: 8px; padding: 10px 12px; margin: 8px 0; font-size: 15px; }
.viz-info p:first-child { margin-top: 0; }
.viz-info p:last-child { margin-bottom: 0; }
.viz-info pre { margin: 6px 0 0; background: var(--surface); }
.viz-controls { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 8px 0; }
.viz-controls label { display: inline-flex; gap: 6px; align-items: center; font-size: 14.5px; }
.viz-err { color: var(--bad); }

/* ---------- Übungen */
.ex-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 18px; margin-bottom: 16px; box-shadow: var(--shadow); }
.ex-head { display: flex; align-items: center; gap: 10px; justify-content: space-between; margin-bottom: 4px; }
.ex-head h4 { margin: 0; font-size: 1.05rem; }
.ex-prompt { margin: 4px 0 10px; }
.match { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 22px; }
.match .col { display: flex; flex-direction: column; gap: 8px; }
.match-item, .quiz-opt {
  text-align: left; border: 1.5px solid var(--border); background: var(--surface); color: var(--text); border-radius: 9px; padding: 9px 12px;
  font: inherit; font-size: 15px; cursor: pointer; transition: border-color .12s, background .12s;
}
.match-item:hover, .quiz-opt:hover { border-color: var(--accent); }
.match-item.sel { background: var(--accent-soft); border-color: var(--accent); }
.match-item.correct, .quiz-opt.correct, .order-item.correct, .chip.correct, .cloze-in.correct, .num-in.correct { border-color: var(--ok) !important; background: var(--ok-soft) !important; }
.match-item.wrong, .quiz-opt.wrong, .order-item.wrong, .chip.wrong, .cloze-in.wrong, .num-in.wrong { border-color: var(--bad) !important; background: var(--bad-soft) !important; }
@media (max-width: 560px) { .match { gap: 8px 10px; } .match-item { font-size: 14px; padding: 8px; } }
.order-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 6px; counter-reset: o; }
.order-item { display: flex; align-items: center; gap: 10px; border: 1.5px solid var(--border); background: var(--surface); border-radius: 9px; padding: 6px 8px 6px 10px; cursor: grab; counter-increment: o; }
.order-item::before { content: counter(o) "."; font-family: var(--mono); color: var(--muted); font-size: 13px; width: 22px; }
.order-item.dragging { opacity: .5; }
.order-item .txt { flex: 1; }
.order-item .grip { color: var(--muted); letter-spacing: -3px; }
.order-item .arrows { display: flex; }
.order-item .icon-btn { width: 30px; height: 30px; font-size: 12px; }
.cls-pool { min-height: 52px; border: 1.5px dashed var(--border); border-radius: 10px; padding: 6px; margin-bottom: 10px; }
.cls-buckets { display: grid; gap: 10px; }
@media (max-width: 560px) { .cls-buckets { grid-template-columns: 1fr !important; } }
.cls-bucket { border: 1.5px solid var(--border); border-radius: 10px; min-height: 110px; background: var(--surface-2); cursor: pointer; }
.cls-bucket.over { border-color: var(--accent); background: var(--accent-soft); }
.cls-title { font-weight: 700; padding: 8px 10px; border-bottom: 1px solid var(--border); font-size: 14.5px; }
.cls-drop { padding: 6px; }
.cloze { line-height: 2.3; }
.cloze-in { margin: 0 3px; padding: 3px 8px !important; border-width: 1.5px !important; }
.tf-row { display: grid; grid-template-columns: 1fr auto; gap: 6px 12px; align-items: center; padding: 10px; border: 1.5px solid var(--border); border-radius: 9px; margin-bottom: 8px; }
.tf-row.correct { border-color: var(--ok); } .tf-row.wrong { border-color: var(--bad); }
.tf-row .explain { grid-column: 1 / -1; margin: 0; }
.tf-btns { display: flex; gap: 4px; }
.tf-btn { border: 1px solid var(--border); background: var(--surface); border-radius: 7px; padding: 4px 10px; cursor: pointer; font: inherit; font-size: 14px; color: var(--text); }
.tf-btn[aria-pressed=true] { background: var(--accent); color: #fff; border-color: var(--accent); }
@media (max-width: 560px) { .tf-row { grid-template-columns: 1fr; } }
.num-in { width: 160px; }
.answer { min-height: 120px; }
.sql-out { margin-top: 8px; }
.schema { margin-bottom: 10px; }
.schema h5 { margin: 10px 0 2px; font-family: var(--mono); }

/* Quiz */
.quiz-head { display: flex; flex-direction: column; gap: 6px; font-size: 13.5px; }
.quiz-bar { height: 5px; background: var(--surface-3); border-radius: 99px; overflow: hidden; }
.quiz-bar span { display: block; height: 100%; background: var(--accent); }
.quiz-q { font-size: 1.08rem; font-weight: 600; margin: 14px 0 10px; }
.quiz-opts { display: flex; flex-direction: column; gap: 8px; }
.quiz-opt[aria-pressed=true] { border-color: var(--accent); background: var(--accent-soft); }
.quiz-done { text-align: center; padding: 16px 0; }
.big-score { font-size: 3rem; font-weight: 800; }
.big-score.ok { color: var(--ok); } .big-score.mid { color: var(--warn); } .big-score.bad { color: var(--bad); }

/* Karteikarten */
.cards { outline: none; }
.cards-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 12px; }
.flashcard { display: block; width: 100%; max-width: 640px; margin: 10px auto; height: 260px; perspective: 1200px; border: 0; background: none; padding: 0; cursor: pointer; font: inherit; color: var(--text); }
.fc-inner { position: relative; width: 100%; height: 100%; transition: transform .45s; transform-style: preserve-3d; }
.flashcard.flipped .fc-inner { transform: rotateY(180deg); }
.fc-face {
  position: absolute; inset: 0; backface-visibility: hidden; border-radius: 16px; border: 1px solid var(--border); background: var(--surface);
  box-shadow: var(--shadow); display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 26px; font-size: 1.15rem; text-align: center; overflow: auto;
}
.fc-face.back { transform: rotateY(180deg); background: var(--accent-soft); font-size: 1.02rem; }
.fc-tag { position: absolute; top: 10px; left: 14px; font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
@media (prefers-reduced-motion: reduce) { .fc-inner { transition: none; } }

/* KI */
.llm-box { margin-top: 10px; }
.llm-out { margin-top: 10px; border: 1px solid var(--ai); background: var(--ai-soft); border-radius: 10px; padding: 12px 16px; }
.llm-out.streaming::after { content: "▍"; animation: blink 1s infinite; color: var(--ai); }
@keyframes blink { 50% { opacity: 0; } }
.llm-out h3 { font-size: 1rem; margin-top: .8em; }
.llm-out pre { background: var(--surface); }
.score-badge { font-weight: 700; }
.chat { display: flex; flex-direction: column; gap: 10px; }
.msg { max-width: 88%; padding: 10px 14px; border-radius: 14px; }
.msg.user { align-self: flex-end; background: var(--accent); color: #fff; border-bottom-right-radius: 4px; white-space: pre-wrap; }
.msg.assistant { align-self: flex-start; background: var(--surface); border: 1px solid var(--border); border-bottom-left-radius: 4px; }
.msg.assistant.streaming::after { content: "▍"; animation: blink 1s infinite; color: var(--ai); }
.chat-input { display: flex; gap: 8px; align-items: flex-end; position: sticky; bottom: 0; background: var(--bg); padding: 10px 0; }
.chat-input textarea { min-height: 46px; max-height: 200px; }
.notice { border: 1px solid var(--warn); background: var(--warn-soft); color: var(--text); border-radius: 10px; padding: 10px 14px; margin-bottom: 14px; }
.notice.info { border-color: var(--accent); background: var(--accent-soft); }

/* Aufgaben */
.task-card .task-meta { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-bottom: 6px; }
.history { font-size: 14px; }
.history li { margin: 2px 0; }
.operator-table td:first-child { font-weight: 600; white-space: nowrap; }

/* Team */
.heat { border-collapse: collapse; font-size: 13px; }
.heat th, .heat td { border: 1px solid var(--border); padding: 4px 6px; text-align: center; }
.heat th.rot { writing-mode: vertical-rl; transform: rotate(180deg); font-weight: 500; max-height: 180px; white-space: nowrap; }
.heat td.todo { background: var(--bad-soft); color: var(--bad); }
.heat td.unsicher { background: var(--warn-soft); color: var(--warn); }
.heat td.sitzt { background: var(--ok-soft); color: var(--ok); }
.heat td.name { text-align: left; white-space: nowrap; font-weight: 600; }

/* Profilwahl */
.profile-list { display: grid; gap: 8px; }
.profile-row { display: flex; align-items: center; gap: 10px; padding: 8px 10px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); }
.profile-row.active { border-color: var(--accent); background: var(--accent-soft); }
.profile-row .grow { flex: 1; }
.welcome { max-width: 560px; margin: 8vh auto; text-align: center; }
.welcome .logo { width: 64px; height: 64px; font-size: 22px; margin: 0 auto 14px; border-radius: 16px; }
.welcome input { width: 100%; font-size: 17px; padding: 10px 14px; }
.timer { font-family: var(--mono); font-size: 1.4rem; font-weight: 700; }
.timer.low { color: var(--bad); }

/* Breite Inhalte in Visualisierungen/Übungen scrollen innerhalb der Karte statt die Seite zu verbreitern */
.content, main, .card, .viz, .viz-body, .ex-card, .section-card, .inline-viz { min-width: 0; max-width: 100%; }
.viz-body, .ex-card > div, .inline-viz { overflow-x: auto; }
.viz-body table, .viz-body pre { max-width: 100%; }
.content { overflow-x: clip; }
.crumbs { flex: 1; }
h1 { overflow-wrap: anywhere; hyphens: auto; }