/* ─────────────────────────────────────────────────────────────
   clg-kurs · Kursbereich. Übernommen aus dem Labor-Entwurf
   (clg.academy, Branch labor, src/design/base.css + src/labor/kurs/kurs.css,
   Commit 3db109b): CLG-Farben, Arc-Formen. Hier ohne React/Motion,
   mobil zuerst geschrieben, größere Bildschirme per min-width.
   ───────────────────────────────────────────────────────────── */

.lab {
  --navy-950: #081326;
  --navy-900: #0d1f3c;
  --navy-800: #122a52;
  --gold: #efbd74;
  --gold-soft: rgba(239, 189, 116, 0.14);
  --gold-ink: #8a5a12;
  --blue: #1055ac;
  --peri: #8daaf4;
  --paper: #f5f7fb;
  --ink: #0d1f3c;
  --ink-2: #4a5872;
  --ink-3: #5c6a80;
  --line: rgba(13, 31, 60, 0.08);
  --rot: #b4232f;

  /* Flächen und Zustände, im dunklen Thema überschrieben (unten) */
  --surface: #fff;
  --hover: var(--paper);
  --strong: var(--navy-900);
  --link: var(--blue);
  --track: rgba(13, 31, 60, 0.08);
  --box-line: rgba(13, 31, 60, 0.25);
  --topbar: rgba(245, 247, 251, 0.82);
  --field: var(--paper);
  --field-focus: #fff;
  --err-bg: rgba(180, 35, 47, 0.08);
  --ok-bg: rgba(16, 85, 172, 0.08);
  --menu-shadow: 0 24px 60px rgba(13, 31, 60, .14);

  --r-control: 18px;
  --r-panel: 22px;
  --r-surface: 28px;

  --shadow-resting: 0 1px 2px rgba(13, 31, 60, .04);
  --shadow-raised: 0 8px 24px rgba(13, 31, 60, .07), 0 1px 3px rgba(13, 31, 60, .04);

  --ease-enter: cubic-bezier(.16, 1, .3, 1);
  --ease-spring: linear(0, 0.0258, 0.09, 0.1763, 0.2732, 0.3724, 0.4683, 0.5573, 0.6376, 0.7082, 0.7689, 0.8202, 0.8628, 0.8976, 0.9256, 0.9476, 0.9648, 0.9778, 0.9875, 0.9945, 0.9994, 1.0026, 1.0047, 1.0058, 1.0062, 1.0062, 1.0059, 1.0055, 1.0049, 1.0043, 1.0036, 1.0031, 1.0025, 1.002, 1.0016, 1.0013, 1);

  --font-display: 'Montserrat', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
}

html, body { margin: 0; background: #f5f7fb; }
html { color-scheme: light; }

/* ── Dunkles Thema: <html data-tema="dark">, gesetzt vor dem ersten Bild
   (Inline-Skript in index.html). Navy bleibt Grundton, Gold der Akzent.
   Alle Textfarben erfüllen WCAG AA auf --surface und --paper. ── */
html[data-tema="dark"] { color-scheme: dark; }
html[data-tema="dark"], html[data-tema="dark"] body { background: #0a1424; }
html[data-tema="dark"] .lab {
  --paper: #0a1424;
  --surface: #101e38;
  --hover: #182b4d;
  --strong: #21406f;
  --ink: #eef2f8;
  --ink-2: #c3cde0;
  --ink-3: #9eacc4;
  --line: rgba(255, 255, 255, 0.10);
  --link: #9db7f7;
  --rot: #ff9aa2;
  --track: rgba(255, 255, 255, 0.10);
  --box-line: rgba(255, 255, 255, 0.35);
  --topbar: rgba(10, 20, 36, 0.82);
  --field: #0a1424;
  --field-focus: #0a1424;
  --err-bg: rgba(255, 154, 162, 0.12);
  --ok-bg: rgba(157, 183, 247, 0.12);
  --gold-soft: rgba(239, 189, 116, 0.12);
  --menu-shadow: 0 24px 60px rgba(0, 0, 0, .5);
  --shadow-resting: 0 1px 2px rgba(0, 0, 0, .3);
  --shadow-raised: 0 8px 24px rgba(0, 0, 0, .25);
}
html[data-tema="dark"] .kl-hero { box-shadow: 0 0 0 1px rgba(255, 255, 255, .07) inset; }
html[data-tema="dark"] .kl-auth-card { box-shadow: 0 0 0 1px var(--line) inset, 0 40px 80px -30px rgba(0,0,0,.6); }
.lab {
  background: var(--paper); color: var(--ink);
  font-family: var(--font-body); letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased; overflow-x: clip;
  min-height: 100vh; min-height: 100dvh;
}
:where(.lab) *, :where(.lab) *::before, :where(.lab) *::after { box-sizing: border-box; }
:where(.lab) :where(h1, h2, h3) { font-family: var(--font-display); margin: 0; }
:where(.lab) p { margin: 0; }
:where(.lab) a { color: inherit; text-decoration: none; }
:where(.lab) :where(button, input) { font: inherit; }
.lab :focus-visible { outline: 2px solid var(--link); outline-offset: 2px; }

.lab-grain::after {
  content: ''; position: absolute; inset: 0; pointer-events: none; opacity: .07; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}
.lab-wrap { max-width: 1120px; margin: 0 auto; padding: 0 14px; }

.lab-eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font: 700 11px/1 var(--font-display); letter-spacing: .22em; text-transform: uppercase; color: var(--ink-3);
}
.lab-eyebrow .num { color: var(--gold); font-variant-numeric: tabular-nums; }
.lab-eyebrow .bar { width: 28px; height: 1px; background: currentColor; opacity: .4; }

/* ── Buttons ── */
.lab-btn {
  position: relative; display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 52px; padding: 0 8px 0 24px; border-radius: 999px; border: 0; cursor: pointer;
  font: 700 15px/1.2 var(--font-display); letter-spacing: -0.01em;
  transition: transform 580ms var(--ease-spring), box-shadow 240ms var(--ease-enter), background 240ms;
}
.lab-btn:active { transform: scale(.97); transition-duration: 120ms; }
.lab-btn[disabled] { opacity: .6; cursor: progress; }
.lab-btn .ico { width: 38px; height: 38px; border-radius: 999px; display: grid; place-items: center; flex: none; }
.lab-btn-gold { background: var(--gold); color: var(--navy-900); box-shadow: 0 0 0 1px rgba(255,255,255,.25) inset, 0 10px 30px -8px rgba(239,189,116,.65); }
.lab-btn-gold .ico { background: var(--navy-900); color: var(--gold); }
.lab-btn-ink { background: var(--strong); color: #fff; }
.lab-btn-ink .ico { background: var(--gold); color: var(--navy-900); }
.lab-btn-plain { padding: 0 24px; }
.kl-link { background: none; border: 0; padding: 0; cursor: pointer; color: var(--link); font-weight: 600; text-decoration: underline; text-underline-offset: 3px; }

/* ── Laden ── */
.kl-laden { min-height: 100vh; display: grid; place-items: center; }
.kl-laden .kl-logo { animation: kl-atem 1.6s ease-in-out infinite; }
@keyframes kl-atem { 50% { opacity: .5; transform: scale(.94); } }

/* ── Kopfzeile ── */
.kl { padding-bottom: 40px; }
.kl-top { position: sticky; top: 0; z-index: 40; padding: 8px 8px 0; }
.kl-top-inner {
  max-width: 1240px; margin: 0 auto; height: 56px; padding: 0 8px 0 14px;
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  border-radius: 999px; background: var(--topbar);
  backdrop-filter: blur(16px) saturate(1.4); -webkit-backdrop-filter: blur(16px) saturate(1.4);
  box-shadow: 0 0 0 1px var(--line) inset, var(--shadow-resting);
}
.kl-brand { display: inline-flex; align-items: center; gap: 10px; font: 800 15px/1 var(--font-display); letter-spacing: -0.02em; color: var(--ink); }
.kl-logo { display: block; flex: none; width: 38px; height: 38px; border-radius: 50%; background: var(--navy-900); position: relative; }
.kl-logo::after {
  content: ''; position: absolute; inset: 8px; background-color: var(--gold);
  -webkit-mask: url('/logo.png') center / contain no-repeat; mask: url('/logo.png') center / contain no-repeat;
}
.kl-back { display: inline-flex; align-items: center; gap: 10px; font: 700 14px/1 var(--font-display); color: var(--ink-2); }
.flip { display: inline-grid; transform: scaleX(-1); }
.kl-konto { position: relative; }
.kl-avatar {
  width: 40px; height: 40px; border-radius: 50%; display: grid; place-items: center; border: 0; cursor: pointer;
  background: var(--strong); color: var(--gold); font: 800 15px/1 var(--font-display); text-transform: uppercase;
}
.kl-avatar { transition: box-shadow 200ms var(--ease-enter), transform 200ms var(--ease-enter); }
.kl-avatar:hover, .kl-avatar[aria-expanded="true"] { box-shadow: 0 0 0 2px var(--surface), 0 0 0 4px var(--gold); }
.kl-menu {
  position: absolute; right: 0; top: 50px; width: min(300px, calc(100vw - 24px)); padding: 6px; border-radius: 20px;
  background: var(--surface); box-shadow: 0 0 0 1px var(--line) inset, var(--menu-shadow);
  transform-origin: top right; animation: kl-menu-auf 220ms var(--ease-enter);
}
@keyframes kl-menu-auf { from { opacity: 0; transform: translateY(-4px) scale(.98); } }
.kl-menu[hidden] { display: none; }
.kl-menu-kopf { display: flex; align-items: center; gap: 12px; padding: 12px 10px 14px; }
.kl-menu-ini {
  flex: none; width: 36px; height: 36px; border-radius: 50%; display: grid; place-items: center;
  background: var(--strong); color: var(--gold); font: 800 14px/1 var(--font-display); text-transform: uppercase;
}
.kl-menu-wer { min-width: 0; display: grid; gap: 3px; }
.kl-menu-name { font: 700 14px/1.2 var(--font-display); color: var(--ink); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.kl-menu-mail { font-size: 13px; line-height: 1.3; color: var(--ink-3); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.kl-menu-zeile {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 10px 6px 10px 10px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
}
.kl-menu-label { font-size: 14px; font-weight: 600; color: var(--ink-2); }
.kl-tema-wahl { display: inline-flex; gap: 2px; padding: 3px; border-radius: 999px; background: var(--paper); box-shadow: 0 0 0 1px var(--line) inset; }
.kl-tema-wahl button {
  width: 36px; height: 30px; display: grid; place-items: center; padding: 0; border: 0; border-radius: 999px;
  background: none; cursor: pointer; color: var(--ink-3); transition: background 180ms, color 180ms, box-shadow 180ms;
}
.kl-tema-wahl button:hover { color: var(--ink); background: var(--hover); }
.kl-tema-wahl button[aria-checked="true"] { background: var(--strong); color: var(--gold); box-shadow: var(--shadow-resting); }
.kl-tema-wahl button:focus-visible { outline: 2px solid var(--gold); outline-offset: 1px; }
.kl-menu-gruppe { display: grid; gap: 2px; padding-top: 6px; }
.kl-menu-item {
  display: flex; align-items: center; gap: 12px; width: 100%; padding: 11px 10px; border: 0; border-radius: 14px;
  background: none; cursor: pointer; text-align: left; font: 600 14px/1.2 var(--font-body); color: var(--ink);
  transition: background 160ms;
}
.kl-menu-ic { display: grid; place-items: center; width: 20px; color: var(--ink-3); transition: color 160ms; }
.kl-menu-item:hover, .kl-menu-item:focus-visible { background: var(--hover); }
.kl-menu-item:hover .kl-menu-ic, .kl-menu-item:focus-visible .kl-menu-ic { color: var(--gold-ink); }
html[data-tema="dark"] .kl-menu-item:hover .kl-menu-ic, html[data-tema="dark"] .kl-menu-item:focus-visible .kl-menu-ic { color: var(--gold); }
.kl-menu-item:active { transform: scale(.985); }

/* ── Hero: Weitermachen ── */
.kl-shell { padding: 8px; }
.kl-hero {
  position: relative; overflow: hidden; isolation: isolate; max-width: 1240px; margin: 0 auto;
  border-radius: var(--r-surface); background: var(--navy-950); color: #fff; padding: 34px 20px 22px;
}
.kl-hero::before {
  content: ''; position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(70% 60% at 90% 0%, rgba(16,85,172,.55), transparent 60%),
    radial-gradient(60% 50% at 0% 100%, rgba(94,81,54,.45), transparent 65%),
    radial-gradient(50% 40% at 40% 40%, rgba(13,31,60,.9), transparent 70%);
}
/* Schimmer wie im Labor: Paper Shaders MeshGradient (app.js, heroSchimmer).
   Der Verlauf oben bleibt als Ersatz, falls WebGL fehlt. */
.kl-hero { clip-path: inset(0 round var(--r-surface)); -webkit-clip-path: inset(0 round var(--r-surface)); }
.kl-hero-mesh { position: absolute; inset: 0; z-index: -2; pointer-events: none; }
.kl-hero-mesh canvas { display: block; width: 100%; height: 100%; }
.kl-hero.mit-mesh::before { display: none; }
.kl-hero .lab-eyebrow { color: rgba(255,255,255,.5); }
.kl-hero-grid { display: grid; gap: 30px; }
.kl-h1 { margin-top: 18px; font-weight: 800; font-size: clamp(32px, 8vw, 58px); line-height: 1.04; letter-spacing: -0.04em; }
.kl-lead { margin-top: 14px; max-width: 42ch; font-size: 16.5px; line-height: 1.6; color: rgba(255,255,255,.7); }
.kl-lead strong { color: var(--gold); font-weight: 700; }

.kl-bar { margin-top: 26px; max-width: 460px; }
.kl-bar-track { height: 8px; border-radius: 8px; background: rgba(255,255,255,.12); overflow: hidden; }
.kl-bar-fill { height: 100%; border-radius: 8px; background: linear-gradient(90deg, var(--peri), var(--gold)); transition: width 800ms var(--ease-enter); }
.kl-bar-text { margin-top: 10px; display: flex; justify-content: space-between; font-size: 13px; color: rgba(255,255,255,.6); font-variant-numeric: tabular-nums; }

.kl-rail { margin-top: 30px; position: relative; max-width: 460px; }
.kl-rail-track { position: absolute; left: 14px; right: 14px; top: 9px; height: 2px; background: rgba(255,255,255,.12); }
.kl-rail-steps { position: relative; display: flex; justify-content: space-between; }
.kl-rail-step { display: flex; flex-direction: column; align-items: center; gap: 8px; width: 40px; background: none; border: 0; padding: 0; cursor: pointer; color: inherit; }
.kl-rail-node { width: 20px; height: 20px; border-radius: 50%; background: var(--navy-950); box-shadow: 0 0 0 2px rgba(255,255,255,.2) inset; }
.kl-rail-node.part { box-shadow: 0 0 0 2px var(--gold) inset, 0 0 0 5px rgba(239,189,116,.14); }
.kl-rail-node.full { background: var(--gold); box-shadow: 0 0 18px rgba(239,189,116,.5); }
.kl-rail-label { font: 700 12px/1 var(--font-display); color: rgba(255,255,255,.85); white-space: nowrap; }
.kl-rail-count { font-size: 11.5px; color: rgba(255,255,255,.45); font-variant-numeric: tabular-nums; }

.kl-continue {
  position: relative; display: block; padding: 8px; border-radius: calc(var(--r-panel) + 8px);
  background: linear-gradient(180deg, rgba(255,255,255,.14), rgba(255,255,255,.04));
  box-shadow: 0 0 0 1px rgba(255,255,255,.12) inset, 0 40px 80px -30px rgba(0,0,0,.7), 0 0 80px -24px rgba(239,189,116,.25);
  transition: transform 600ms var(--ease-spring);
}
.kl-continue::before { content: ''; position: absolute; left: 14%; right: 14%; top: 0; height: 1px; background: linear-gradient(90deg, transparent, rgba(239,189,116,.85), transparent); }
.kl-continue-thumb {
  position: relative; aspect-ratio: 16 / 8.2; border-radius: var(--r-panel); overflow: hidden; display: grid; place-items: center;
  background: radial-gradient(120% 90% at 85% 10%, rgba(239,189,116,.35), transparent 55%), radial-gradient(90% 80% at 10% 90%, rgba(16,85,172,.75), transparent 60%), var(--navy-900);
}
.kl-thumb-bild { position: absolute; inset: 0; background: center / cover no-repeat; opacity: 0; transition: opacity 500ms var(--ease-enter); }
.kl-thumb-bild.da { opacity: 1; }
.kl-thumb-bild.da::after { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(8,19,38,.35), transparent 35%, transparent 60%, rgba(8,19,38,.7)); }
.kl-continue-thumb > :not(.kl-thumb-bild) { position: relative; z-index: 1; }
.kl-continue-thumb > .kl-continue-level, .kl-continue-thumb > .kl-continue-min { position: absolute; }
.kl-continue-level { position: absolute; left: 12px; top: 12px; padding: 6px 10px; border-radius: 999px; font: 700 11px/1 var(--font-display); letter-spacing: .1em; color: var(--navy-900); background: var(--gold); }
.kl-continue-min { position: absolute; right: 14px; bottom: 12px; font-size: 12.5px; color: rgba(255,255,255,.75); font-variant-numeric: tabular-nums; }
.kl-continue-play {
  width: 60px; height: 60px; border-radius: 50%; display: grid; place-items: center; padding-left: 3px;
  background: rgba(255,255,255,.95); color: var(--navy-900); box-shadow: 0 0 0 10px rgba(255,255,255,.12), 0 20px 40px -10px rgba(0,0,0,.6);
}
.kl-continue-body { padding: 18px 12px 8px; }
.kl-kicker { font: 700 11px/1.3 var(--font-display); letter-spacing: .2em; text-transform: uppercase; color: var(--gold); }
.kl-kicker-ink { color: var(--ink-3); }
.kl-continue-title { margin-top: 10px; font-weight: 800; font-size: 22px; line-height: 1.15; letter-spacing: -0.025em; }
.kl-continue-de { margin-top: 6px; font-size: 14px; color: rgba(255,255,255,.55); font-style: italic; }
.kl-continue-btn { margin-top: 18px; width: 100%; justify-content: space-between; }

/* ── Module + Lektionen ── */
.kl-section { padding-top: 48px; }
.kl-section-head { display: grid; gap: 18px; margin-bottom: 20px; }
.kl-h2 { margin-top: 14px; font-weight: 800; font-size: clamp(26px, 6vw, 42px); line-height: 1.08; letter-spacing: -0.035em; }

.lab-seg { display: inline-flex; padding: 4px; gap: 2px; border-radius: 999px; background: var(--surface); box-shadow: 0 0 0 1px var(--line) inset; max-width: 100%; overflow-x: auto; }
.lab-seg button { height: 40px; padding: 0 14px; border: 0; border-radius: 999px; background: none; cursor: pointer; font: 700 13px/1 var(--font-display); color: var(--ink-3); white-space: nowrap; transition: background 200ms, color 200ms; }
.lab-seg button[aria-pressed="true"] { background: var(--strong); color: #fff; }
/* Stufen-Tabs auf dem Handy: vier gleich breite Segmente über die volle Breite. */
@media (max-width: 639px) {
  .kl-section-head .lab-seg { display: grid; grid-template-columns: repeat(4, 1fr); width: 100%; overflow: visible; }
  .kl-section-head .lab-seg button { padding: 0 4px; text-align: center; }
}

.kl-module { border-radius: var(--r-surface); background: var(--surface); padding: 8px; box-shadow: 0 0 0 1px var(--line) inset, var(--shadow-raised); }
.kl-module-head { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; padding: 14px 10px 16px; }
.kl-module-title { margin-top: 8px; font-weight: 800; font-size: 22px; letter-spacing: -0.03em; }
.kl-module-count { width: 100%; font-size: 14px; color: var(--ink-3); font-variant-numeric: tabular-nums; }

.kl-ring { position: relative; flex: none; display: grid; place-items: center; }
.kl-ring svg { position: absolute; inset: 0; }
.kl-ring .track { stroke: var(--track); }
.kl-ring .fill { stroke: var(--gold); transition: stroke-dashoffset 800ms var(--ease-enter); }
.kl-ring-label { position: relative; font: 800 13px/1 var(--font-display); color: var(--ink); font-variant-numeric: tabular-nums; }

.kl-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; }
.kl-row { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 12px; padding: 12px 10px; border-radius: var(--r-control); transition: background 200ms; }
a.kl-row:hover { background: var(--hover); }
.kl-row-text { display: grid; gap: 3px; min-width: 0; }
.kl-row-ro { font-weight: 600; font-size: 15px; color: var(--ink); line-height: 1.3; }
.kl-row-de { font-size: 12.5px; color: var(--ink-3); font-style: italic; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.kl-row-done .kl-row-ro { color: var(--ink-2); }
.kl-row-current { background: var(--gold-soft); box-shadow: 0 0 0 1px rgba(239,189,116,.45) inset; }
.kl-row-soon { opacity: .55; }
.kl-row-meta { font-size: 12.5px; color: var(--ink-3); font-variant-numeric: tabular-nums; white-space: nowrap; }
.kl-row-go { display: none; width: 30px; height: 30px; border-radius: 50%; place-items: center; color: var(--ink-3); background: var(--hover); transition: transform 500ms var(--ease-spring), background 200ms, color 200ms; }
a.kl-row:hover .kl-row-go { transform: translateX(3px); background: var(--strong); color: var(--gold); }
.kl-soon { font: 700 10.5px/1 var(--font-display); letter-spacing: .12em; text-transform: uppercase; color: var(--ink-3); padding: 6px 9px; border-radius: 999px; box-shadow: 0 0 0 1px var(--line) inset; white-space: nowrap; }

.kl-mark { position: relative; flex: none; width: 32px; height: 32px; border-radius: 50%; display: grid; place-items: center; font: 700 12px/1 var(--font-display); color: var(--ink-3); font-variant-numeric: tabular-nums; box-shadow: 0 0 0 1px var(--line) inset; background: var(--surface); }
.kl-mark-done { background: var(--strong); color: var(--gold); box-shadow: none; }
.kl-mark-current { background: var(--gold); color: var(--navy-900); box-shadow: none; }
.kl-mark-current .pulse { position: absolute; inset: -4px; border-radius: 50%; border: 2px solid var(--gold); animation: kl-pulse 2.2s var(--ease-enter) infinite; }
@keyframes kl-pulse { 0% { opacity: .8; transform: scale(.9); } 100% { opacity: 0; transform: scale(1.35); } }

.kl-foot { margin-top: 40px; font-size: 12.5px; color: var(--ink-3); text-align: center; }

/* ── Lektionsseite ── */
.kl-lesson { display: grid; gap: 24px; padding-top: 22px; max-width: 1240px; }
.kl-crumb { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; font-size: 13.5px; color: var(--ink-3); }
.kl-crumb .dot { width: 3px; height: 3px; border-radius: 50%; background: currentColor; opacity: .6; }
.kl-pill { padding: 6px 10px; border-radius: 999px; background: var(--strong); color: var(--gold); font: 700 11px/1 var(--font-display); letter-spacing: .1em; }
.kl-lesson-title { margin-top: 14px; font-weight: 800; font-size: clamp(26px, 6.5vw, 42px); line-height: 1.08; letter-spacing: -0.035em; }
.kl-lesson-de { margin-top: 8px; font-size: 15px; color: var(--ink-3); font-style: italic; }

.kl-player { margin: 20px -6px 0; padding: 6px; border-radius: calc(var(--r-panel) + 6px); background: var(--navy-950); box-shadow: 0 40px 80px -36px rgba(8,19,38,.6); }
.kl-player-frame { position: relative; aspect-ratio: 16 / 9; border-radius: var(--r-panel); overflow: hidden; background: #000; }
.kl-player-frame.da { background: #000 center / cover no-repeat; }
.kl-player-frame.da .kl-player-msg { background: rgba(8,19,38,.55); color: #fff; }
.kl-player-frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.kl-player-msg { position: absolute; inset: 0; display: grid; place-items: center; padding: 20px; text-align: center; color: rgba(255,255,255,.7); font-size: 14px; }
.kl-player-cap { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 10px 6px; color: #fff; }
.kl-player-cap strong { font: 700 15px/1.25 var(--font-display); }
.kl-player-cap span { font-size: 12.5px; color: rgba(255,255,255,.55); white-space: nowrap; }

.kl-next-hint { margin-top: 12px; display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 12px 12px 16px; border-radius: var(--r-control); background: var(--gold-soft); box-shadow: 0 0 0 1px rgba(239,189,116,.45) inset; font-size: 14.5px; font-weight: 600; }
.kl-next-hint[hidden] { display: none; }
.kl-next-hint button { flex: none; height: 40px; padding: 0 16px; border: 0; border-radius: 999px; background: var(--strong); color: #fff; font: 700 13.5px/1 var(--font-display); cursor: pointer; }

.kl-acts { margin-top: 22px; border-radius: var(--r-surface); background: var(--surface); padding: 8px; box-shadow: 0 0 0 1px var(--line) inset, var(--shadow-raised); }
.kl-acts-head { display: flex; align-items: center; gap: 14px; padding: 12px 10px 14px; border-bottom: 1px solid var(--line); }
.kl-acts-head strong { display: block; margin-top: 6px; font: 800 18px/1.15 var(--font-display); letter-spacing: -0.02em; }
.kl-act-list { list-style: none; margin: 8px 0 0; padding: 0; display: grid; gap: 2px; }
.kl-act { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 4px; border-radius: var(--r-control); transition: background 200ms; }
.kl-act:hover { background: var(--hover); }
.kl-act.active { background: var(--strong); color: #fff; }
.kl-act.active .kl-act-meta { color: rgba(255,255,255,.72); }
.kl-check { width: 48px; height: 48px; display: grid; place-items: center; border: 0; background: none; cursor: pointer; padding: 0; }
.kl-check .box { width: 26px; height: 26px; border-radius: 8px; display: grid; place-items: center; box-shadow: 0 0 0 1.5px var(--box-line) inset; background: var(--surface); color: var(--navy-900); transition: background 200ms, transform 400ms var(--ease-spring); }
.kl-check[aria-checked="true"] .box { background: var(--gold); box-shadow: none; }
.kl-check:active .box { transform: scale(.88); }
.kl-act.active .kl-check .box { box-shadow: 0 0 0 1.5px rgba(255,255,255,.4) inset; background: transparent; color: var(--navy-900); }
.kl-act.active .kl-check[aria-checked="true"] .box { background: var(--gold); box-shadow: none; }
.kl-act-play { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 10px; min-height: 52px; padding: 8px 12px 8px 4px; border: 0; background: none; cursor: pointer; text-align: left; color: inherit; }
.kl-act-title { font-weight: 600; font-size: 15px; }
.kl-act-auto { display: block; margin-top: 2px; font-size: 12px; font-weight: 500; color: var(--ink-3); }
.kl-act.active .kl-act-auto { color: rgba(255,255,255,.72); }
.kl-act-meta { font-size: 12.5px; color: var(--ink-3); font-variant-numeric: tabular-nums; display: inline-flex; align-items: center; gap: 8px; }
.kl-act-meta svg { opacity: .7; }
.kl-acts-note { padding: 10px 12px 8px; font-size: 12.5px; color: var(--ink-3); line-height: 1.5; }

.kl-nav { margin-top: 18px; display: flex; gap: 8px; justify-content: space-between; }
.kl-nav-btn { display: inline-flex; align-items: center; gap: 8px; height: 48px; padding: 0 18px; border-radius: 999px; font: 700 14px/1 var(--font-display); color: var(--ink-2); box-shadow: 0 0 0 1px var(--line) inset; }
.kl-nav-next { margin-left: auto; background: var(--strong); color: #fff; box-shadow: none; }

.kl-side-card { border-radius: var(--r-surface); background: var(--surface); padding: 8px; box-shadow: 0 0 0 1px var(--line) inset, var(--shadow-raised); }
.kl-side-head { display: flex; align-items: center; gap: 14px; padding: 12px 10px 14px; border-bottom: 1px solid var(--line); }
.kl-side-title { display: block; margin-top: 7px; font: 800 18px/1.1 var(--font-display); letter-spacing: -0.02em; }
.kl-side-list { list-style: none; margin: 8px 0 0; padding: 0; }
.kl-side-row { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 12px; padding: 9px 10px; border-radius: 16px; }
a.kl-side-row:hover { background: var(--hover); }
.kl-side-row .kl-mark { width: 28px; height: 28px; font-size: 11px; }
.kl-side-ro { font-size: 14px; font-weight: 600; color: var(--ink-2); line-height: 1.3; }
.kl-side-min { font-size: 12px; color: var(--ink-3); font-variant-numeric: tabular-nums; }
.kl-side-row.active { background: var(--strong); }
.kl-side-row.active .kl-side-ro { color: #fff; }
.kl-side-row.active .kl-side-min { color: rgba(255,255,255,.72); }
.kl-side-row.active .kl-mark:not(.kl-mark-done):not(.kl-mark-current) { background: transparent; color: #fff; box-shadow: 0 0 0 1px rgba(255,255,255,.25) inset; }

/* ── Anmeldung ── */
.kl-auth { min-height: 100vh; min-height: 100dvh; display: grid; align-content: center; justify-items: center; padding: 24px 14px; background: var(--navy-950); position: relative; isolation: isolate; overflow: hidden; }
.kl-auth::before { content: ''; position: absolute; inset: 0; z-index: -1; background: radial-gradient(60% 50% at 85% 0%, rgba(16,85,172,.6), transparent 60%), radial-gradient(50% 40% at 0% 100%, rgba(239,189,116,.18), transparent 65%); }
.kl-auth-brand { display: inline-flex; align-items: center; gap: 12px; color: #fff; font: 800 16px/1 var(--font-display); margin-bottom: 22px; }
.kl-auth-card { width: 100%; max-width: 420px; padding: 26px 20px 22px; border-radius: var(--r-surface); background: var(--surface); box-shadow: 0 40px 80px -30px rgba(0,0,0,.6); }
.kl-auth-card h1 { font-weight: 800; font-size: 26px; letter-spacing: -0.03em; line-height: 1.15; }
.kl-auth-card > p { margin-top: 10px; font-size: 15px; line-height: 1.55; color: var(--ink-2); }
.kl-form { margin-top: 22px; display: grid; gap: 14px; }
.kl-field { display: grid; gap: 7px; }
.kl-field span { font: 700 13px/1 var(--font-display); color: var(--ink-2); }
.kl-field input { height: 52px; padding: 0 16px; border-radius: 16px; border: 0; background: var(--field); box-shadow: 0 0 0 1px var(--line) inset; font-size: 16px; color: var(--ink); }
.kl-field input:focus { outline: none; box-shadow: 0 0 0 2px var(--link) inset; background: var(--field-focus); }
.kl-form .lab-btn { margin-top: 6px; width: 100%; }
.kl-msg { padding: 12px 14px; border-radius: 14px; font-size: 14px; line-height: 1.5; }
.kl-msg-err { background: var(--err-bg); color: var(--rot); }
.kl-msg-ok { background: var(--ok-bg); color: var(--link); }
.kl-auth-alt { margin-top: 18px; text-align: center; font-size: 14px; color: var(--ink-3); }
.kl-auth-foot { margin-top: 22px; font-size: 12.5px; color: rgba(255,255,255,.45); text-align: center; }

/* ── Größere Bildschirme ── */
@media (min-width: 640px) {
  .lab-wrap { padding: 0 20px; }
  .kl-hero { padding: 48px 36px 36px; }
  .kl-row { grid-template-columns: auto 1fr auto auto; gap: 16px; padding: 14px 16px; }
  .kl-row-go { display: grid; }
  .kl-module { padding: 12px; }
  .kl-module-head { flex-wrap: nowrap; padding: 18px 18px 22px; }
  .kl-module-count { width: auto; margin-left: auto; }
  .kl-continue-btn { width: auto; }
  .kl-player { margin: 24px 0 0; padding: 10px; border-radius: calc(var(--r-panel) + 10px); }
  .kl-auth-card { padding: 34px 32px 28px; }
}
@media (min-width: 980px) {
  .kl-hero { padding: 64px 48px 56px; border-radius: 34px; }
  .kl-hero-grid { grid-template-columns: 1.05fr 1fr; gap: 48px; align-items: center; }
  .kl-section { padding-top: 80px; }
  .kl-section-head { display: flex; align-items: flex-end; justify-content: space-between; }
  .kl-list { grid-template-columns: 1fr 1fr; }
  .kl-lesson { grid-template-columns: minmax(0, 1fr) 360px; gap: 28px; align-items: start; padding-top: 36px; }
  .kl-side { position: sticky; top: 86px; }
  .kl-side-list { max-height: calc(100vh - 240px); overflow-y: auto; scrollbar-width: thin; }
}
@media (prefers-reduced-motion: reduce) {
  .kl-mark-current .pulse, .kl-laden .kl-logo, .kl-menu { animation: none; }
  .kl-thumb-bild { transition: none; }
  .kl-continue, .lab-btn { transition: none; }
}