/* ==========================================================================
   Designschicht der Selbstlern-Kurse (seit 23.09.2026)
   --------------------------------------------------------------------------
   Wird vom Build (flpro/scripts/build-schulungen-static.js) NACH dem Inline-Style
   jeder Kursseite eingebunden und überlagert ihn: gleiche Spezifität, spätere
   Regel gewinnt. Inhalte, IDs und das Kurs-JS (navigate, Quiz, Zertifikat)
   bleiben unberührt. Was nur mit JS geht (Gehirn, Nervenbahn-Knoten,
   Stufenpfad, Lightbox), fügt kurs.js ein — alles mit Präfix kd-.
   Farben: --cat = Kategorie des Kurses (setzt der Build), sonst Lime.
   Die Gehirn-Engine liest --fl-primary/--fl-accent/--fl-hero-text.
   ========================================================================== */
:root {
  --cat: #bce941;
  --border-hi: #2f6a88;
  --ease-out: cubic-bezier(.16, 1, .3, 1);
  --fl-primary: #7cc4f0;
  --fl-accent: #bce941;
  --fl-hero-text: #e8ebf0;
}
html { scrollbar-color: var(--border-hi) var(--bg); }
body {
  background:
    radial-gradient(1000px 560px at 88% -6%, rgba(124,196,240,0.11), transparent 60%),
    radial-gradient(760px 480px at 20% 0%, color-mix(in srgb, var(--cat) 9%, transparent), transparent 60%),
    var(--bg);
  background-attachment: fixed;
}
::selection { background: var(--accent); color: #071b36; }

/* ── Rahmen ─────────────────────────────────────────────────────────────── */
.app { grid-template-columns: 288px minmax(0, 1fr); }
.view-container { max-width: 960px; padding: 20px 44px 120px; }

/* ── Sidebar als Nervenbahn ─────────────────────────────────────────────── */
.sidebar { background: linear-gradient(180deg, #06192f 0%, #041326 100%); padding: 22px 0 0; scrollbar-width: thin; }
.brand { padding: 0 22px 20px; }
.kd-marke { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.kd-badge { width: 34px; height: 34px; border-radius: 10px; background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #071b36; display: grid; place-items: center; font-weight: 800; font-size: 0.86rem; letter-spacing: 0.4px; flex-shrink: 0; }
.kd-marke-text { font-size: 0.74rem; line-height: 1.3; color: var(--text-dim); }
.kd-marke-text b { display: block; color: var(--text); font-size: 0.8rem; font-weight: 600; }
.brand-title { background: none; -webkit-text-fill-color: currentColor; color: #fff; font-size: 1.22rem; font-weight: 700; letter-spacing: -0.012em; line-height: 1.25; }
.brand-sub { font-size: 0.8rem; margin-top: 4px; }
.brand-back { margin-top: 14px; padding: 6px 12px; border: 1px solid var(--border-hi); border-radius: 999px; color: var(--text-dim); font-size: 0.78rem; transition: color .2s, border-color .2s; }
.brand-back:hover { color: var(--text); border-color: var(--accent); }

.nav { padding: 16px 14px 18px; }
.nav-sep { padding: 16px 10px 6px; font-size: 0.68rem; letter-spacing: 0.09em; color: #7f9fbf; opacity: 1; font-weight: 700; }
.nav-item { position: relative; gap: 12px; padding: 7px 10px 7px 8px; margin-bottom: 4px; border-radius: 12px; border-left: 0; line-height: 1.35; transition: background .2s, color .2s; }
.nav-item:hover { background: rgba(124,196,240,0.07); }
.nav-item.active { background: linear-gradient(90deg, color-mix(in srgb, var(--cat) 15%, transparent), transparent 85%); border-left: 0; color: #fff; }
.nav-num { position: relative; z-index: 1; width: 28px; height: 28px; background: var(--bg); border: 1.5px solid var(--border-hi); color: var(--text-dim); font-size: 0.74rem; transition: background .3s, border-color .3s, color .3s, box-shadow .3s; }
.nav-num svg { width: 14px; height: 14px; }
/* Axon zum nächsten Knoten — nur zwischen den Kernstufen */
.nav-item.kd-stufe::before { content: ""; position: absolute; left: 21px; top: 35px; height: 18px; width: 1.5px; background: var(--border-hi); transition: background .4s; }
.nav-item.kd-stufe-letzte::before { display: none; }
.nav-item.done .nav-num { background: color-mix(in srgb, var(--cat) 22%, var(--bg)); border-color: var(--cat); color: var(--cat); }
.nav-item.done.kd-stufe::before { background: color-mix(in srgb, var(--cat) 70%, transparent); }
.nav-item.active .nav-num { background: var(--cat); border-color: var(--cat); color: #071b36; box-shadow: 0 0 0 5px color-mix(in srgb, var(--cat) 18%, transparent), 0 0 18px color-mix(in srgb, var(--cat) 45%, transparent); animation: kd-puls 2.6s ease-in-out infinite; }
@keyframes kd-puls { 50% { box-shadow: 0 0 0 8px color-mix(in srgb, var(--cat) 8%, transparent), 0 0 26px color-mix(in srgb, var(--cat) 55%, transparent); } }

.sidebar-progress { padding: 16px 22px; }
.progress-track { height: 5px; background: rgba(124,196,240,0.14); }
.progress-fill { background: linear-gradient(90deg, var(--cat), var(--accent)); box-shadow: 0 0 10px color-mix(in srgb, var(--cat) 50%, transparent); }
.progress-text { font-variant-numeric: tabular-nums; }
.book-cta { border-left: 1px solid var(--border); border-radius: 14px; margin: auto 14px 14px; }
.sidebar-foot { padding: 14px 22px 18px; }

/* ── Kurs-Leiste (Nervenzellen, dauerhaft oben) + Abbinder ─────────────── */
.kd-band { position: relative; height: 40px; margin: 6px 44px 0; }
.kd-abbinder { display: flex; justify-content: center; padding: 8px 24px 40px; opacity: .85; }
.kd-abbinder .fl-kon-frag { width: min(100%, 420px); aspect-ratio: 4 / 1; }
.fl-kon-frag, .fl-kon-stage { position: relative; }
.fl-kon-frag > canvas, .fl-kon-stage > canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }

/* ── Umschalter (OS / Tool) ─────────────────────────────────────────────── */
.os-switch, .tool-switch { background: rgba(6,25,47,0.86); backdrop-filter: blur(10px) saturate(1.2); -webkit-backdrop-filter: blur(10px) saturate(1.2); padding: 10px 44px; }
.os-seg, .tool-seg { border-radius: 999px; border-color: var(--border-hi); }
.os-seg button, .tool-seg button { padding: 7px 16px; }
.os-seg button[aria-pressed="true"], .tool-seg button[aria-pressed="true"] { background: var(--cat); color: #071b36; }

/* ── Kopf jeder Ansicht ─────────────────────────────────────────────────── */
header.hero { text-align: left; padding: 30px 0 34px; margin-bottom: 40px; border-bottom: 1px solid var(--border); }
.stage-label { background: none; color: var(--cat); padding: 0; border-radius: 0; font-size: 0.8rem; letter-spacing: 0.08em; margin-bottom: 14px; }
.stage-label.final { background: none; color: var(--accent-3); }
h1 { background: none; -webkit-text-fill-color: currentColor; color: #fff; font-size: clamp(2rem, 3.4vw, 2.75rem); font-weight: 700; letter-spacing: -0.022em; line-height: 1.12; text-wrap: balance; margin-bottom: 14px; }
.subtitle { margin: 0; max-width: 62ch; font-size: 1.1rem; }

/* Stufenpfad im Kopf: wo stehe ich im Kurs? */
.kd-pfad { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-top: 22px; }
.kd-pfad-knoten { display: flex; align-items: center; }
.kd-pfad-knoten button { width: 12px; height: 12px; padding: 0; border-radius: 50%; border: 1.5px solid var(--border-hi); background: var(--bg); cursor: pointer; position: relative; transition: transform .2s var(--ease-out), background .3s, border-color .3s; }
.kd-pfad-knoten button + button { margin-left: 16px; }
.kd-pfad-knoten button + button::before { content: ""; position: absolute; right: 100%; top: 50%; width: 17.5px; height: 1.5px; background: var(--border-hi); margin-right: 0; transform: translateY(-50%); }
.kd-pfad-knoten button.an { background: color-mix(in srgb, var(--cat) 35%, var(--bg)); border-color: var(--cat); }
.kd-pfad-knoten button.an + button::before, .kd-pfad-knoten button.an + button.an::before { background: color-mix(in srgb, var(--cat) 65%, transparent); }
.kd-pfad-knoten button.hier { background: var(--cat); border-color: var(--cat); transform: scale(1.35); box-shadow: 0 0 12px color-mix(in srgb, var(--cat) 60%, transparent); }
.kd-pfad-knoten button:hover { transform: scale(1.3); border-color: var(--cat); }
.kd-pfad-text { color: var(--text-dim); font-size: 0.84rem; font-variant-numeric: tabular-nums; }

/* Startseite des Kurses: Kopf mit Gehirn */
header.hero.kd-home { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr); gap: 10px 36px; align-items: center; padding-top: 18px; }
.kd-home-text { min-width: 0; }
.kd-gehirn-buehne { position: relative; justify-self: center; width: min(100%, 400px); }
.kd-gehirn-buehne::before { content: ""; position: absolute; inset: 8% 4% 12%; border-radius: 50%; background: radial-gradient(closest-side, color-mix(in srgb, var(--cat) 16%, transparent), rgba(124,196,240,0.06) 60%, transparent); filter: blur(14px); pointer-events: none; }
.kd-gehirn { width: 100%; aspect-ratio: 5 / 4; }
.kd-fakten { display: flex; flex-wrap: wrap; gap: 6px 0; margin-top: 22px; color: var(--text-dim); font-size: 0.9rem; }
.kd-fakten span { padding: 0 14px; border-left: 1px solid var(--border); }
.kd-fakten span:first-child { padding-left: 0; border-left: 0; }
.kd-fakten b { color: var(--text); font-variant-numeric: tabular-nums; }

/* ── Inhalt ─────────────────────────────────────────────────────────────── */
section.subsection { margin-bottom: 52px; }
h2 { font-size: clamp(1.35rem, 2.2vw, 1.6rem); letter-spacing: -0.015em; line-height: 1.25; text-wrap: balance; }
h2 .num { width: 34px; height: 34px; border-radius: 50%; background: transparent; border: 1.5px solid var(--cat); color: var(--cat); font-size: 0.88rem; }
h2 .num.kd-syn { border: 0; width: 32px; height: 20px; border-radius: 0; }
h2 .num.kd-syn svg { width: 32px; height: 20px; }
h2 + p.lead { max-width: 68ch; }
h3 { letter-spacing: -0.005em; }
a.doc-link { text-underline-offset: 3px; }
code.inline, .osc { border-radius: 6px; }

.landing-intro { border-radius: 20px; padding: 28px 30px; background: linear-gradient(160deg, color-mix(in srgb, var(--cat) 7%, var(--bg-card)), var(--bg-card)); }
.landing-intro h3 { color: #fff; font-size: 1.15rem; }
.landing-grid { grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 16px; }
.stage-card { position: relative; overflow: hidden; border-radius: 18px; padding: 22px 22px 20px; transition: transform .35s var(--ease-out), border-color .3s, box-shadow .35s; }
.stage-card::before { content: ""; position: absolute; left: 0; right: 0; top: 0; height: 2px; background: var(--cat); opacity: .55; }
.stage-card:hover { transform: translateY(-4px); border-color: color-mix(in srgb, var(--cat) 60%, var(--border)); box-shadow: 0 22px 40px -24px rgba(0,0,0,0.85); }
.stage-card-num { width: 38px; height: 38px; border-radius: 50%; background: transparent; border: 1.5px solid var(--cat); color: var(--cat); }
.stage-card.kd-done .stage-card-num { background: var(--cat); color: #071b36; }
.stage-card.kd-done::after { content: "besucht"; position: absolute; top: 18px; right: 18px; font-size: 0.7rem; font-weight: 700; color: var(--cat); letter-spacing: 0.04em; }

.callout { border: 1px solid rgba(124,196,240,0.26); border-left-width: 1px; border-radius: 14px; background: rgba(124,196,240,0.07); padding: 16px 20px; }
.callout.warn { border-color: rgba(251,191,36,0.34); }
.callout.error { border-color: rgba(248,113,113,0.36); }
.callout.tip { border-color: color-mix(in srgb, var(--accent) 34%, transparent); }
.checklist { border: 1px solid color-mix(in srgb, var(--cat) 45%, transparent); border-radius: 20px; background: linear-gradient(160deg, color-mix(in srgb, var(--cat) 8%, transparent), rgba(124,196,240,0.04)); }
.checklist h3 { color: var(--cat); }
.check-item input[type="checkbox"] { accent-color: var(--cat); }
.steps li { border-radius: 14px; }
.steps li::before { background: var(--cat); }
.feat-card { border-radius: 16px; transition: border-color .25s, transform .3s var(--ease-out); }
.feat-card:hover { border-color: color-mix(in srgb, var(--cat) 45%, var(--border)); }

.terminal-block, .window-frame, .code-block, .video-frame, .anatomy, .cmdmap-wrap, .compare, .flow, .sketch { border-radius: 16px; }
.terminal-block, .window-frame, .code-block, .video-frame { box-shadow: 0 20px 44px -28px rgba(0,0,0,0.9); }
.terminal-bar, .window-bar, .video-frame .vf-bar { background: linear-gradient(180deg, #081f3a, #06192f); }
img.kd-zoom { cursor: zoom-in; transition: filter .3s; }
img.kd-zoom:hover { filter: brightness(1.06); }

/* ── Weiter / Zurück ─────────────────────────────────────────────────────── */
.stage-nav { margin-top: 60px; padding-top: 0; border-top: 0; gap: 14px; align-items: stretch; }
.stage-nav button { border-radius: 14px; padding: 14px 20px; }
.stage-nav .next { background: var(--accent); color: #071b36; }
.stage-nav .next.kd-weiter { flex: 0 1 460px; display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2px 16px; text-align: left; padding: 18px 22px; background: linear-gradient(135deg, color-mix(in srgb, var(--cat) 20%, var(--bg-card)), var(--bg-card) 75%); border: 1px solid color-mix(in srgb, var(--cat) 55%, var(--border)); color: var(--text); font-weight: 400; box-shadow: 0 18px 40px -26px rgba(0,0,0,0.9); transition: transform .3s var(--ease-out), border-color .3s; }
.stage-nav .next.kd-weiter:hover { transform: translateY(-3px); border-color: var(--cat); }
.kd-weiter small { grid-column: 1; font-size: 0.74rem; font-weight: 700; letter-spacing: 0.06em; color: var(--cat); }
.kd-weiter b { grid-column: 1; font-size: 1.02rem; font-weight: 700; line-height: 1.3; color: #fff; }
.kd-weiter i { grid-column: 2; grid-row: 1 / span 2; font-style: normal; width: 40px; height: 40px; border-radius: 50%; display: grid; place-items: center; background: var(--cat); color: #071b36; font-weight: 700; transition: transform .3s var(--ease-out); }
.kd-weiter:hover i { transform: translateX(4px); }

/* ── Quiz + Zertifikat-Einleitung ───────────────────────────────────────── */
.quiz-card { border-radius: 20px; padding: 32px; }
.quiz-pip { background: rgba(124,196,240,0.18); }
.quiz-pip.done { background: var(--cat); }
.quiz-option { border-radius: 12px; border-width: 1.5px; }
.quiz-btn { background: var(--accent); }
.quiz-result-card { border-radius: 22px; border-width: 1.5px; }
.quiz-score, .quiz-result-card.failed .quiz-score { background: none; -webkit-text-fill-color: currentColor; color: var(--accent); }
.quiz-result-card.failed .quiz-score { color: var(--warn); }
.cert-intro { border-radius: 18px; }

/* ── Handy-Menü ─────────────────────────────────────────────────────────── */
.mobile-menu-btn { border-radius: 999px; padding: 9px 16px; background: rgba(13,41,73,0.92); backdrop-filter: blur(8px); border-color: var(--border-hi); font-weight: 600; }

/* ── Lightbox ───────────────────────────────────────────────────────────── */
.kd-lb { border: 0; padding: 0; margin: auto; width: min(1180px, 100vw - 32px); max-width: none; max-height: calc(100vh - 32px); background: transparent; color: var(--text); overflow: visible; }
.kd-lb::backdrop { background: rgba(3,12,24,0.92); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); }
.kd-lb[open] { animation: kd-lb-auf .35s var(--ease-out); }
@keyframes kd-lb-auf { from { opacity: 0; transform: translateY(10px) scale(.985); } }
.kd-lb-kopf { display: flex; align-items: center; gap: 14px; margin-bottom: 12px; }
.kd-lb-zahl { color: var(--text-dim); font-size: 0.86rem; font-variant-numeric: tabular-nums; }
.kd-rund { width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--border-hi); background: rgba(13,41,73,0.9); color: var(--text); display: grid; place-items: center; cursor: pointer; font-size: 1.1rem; transition: border-color .2s; }
.kd-rund:hover { border-color: var(--accent); }
.kd-rund:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.kd-lb-zu { margin-left: auto; }
.kd-lb-buehne { position: relative; display: flex; align-items: center; justify-content: center; background: var(--code-bg); border: 1px solid var(--border); border-radius: 16px; overflow: hidden; height: min(74vh, 720px); touch-action: pan-y; }
.kd-lb-buehne img { max-width: 100%; max-height: 100%; object-fit: contain; display: block; user-select: none; -webkit-user-drag: none; background: #fff0; }
.kd-lb-zur, .kd-lb-vor { position: absolute; top: 50%; transform: translateY(-50%); }
.kd-lb-zur { left: 12px; }
.kd-lb-vor { right: 12px; }
.kd-lb-text { margin-top: 12px; color: var(--text-dim); font-size: 0.92rem; max-width: 90ch; }

/* ── Schmale Bildschirme ─────────────────────────────────────────────────── */
@media (max-width: 1100px) {
  header.hero.kd-home { grid-template-columns: 1fr; }
  .kd-gehirn-buehne { order: -1; width: min(70%, 300px); margin-bottom: -6px; }
}
@media (max-width: 768px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { width: 288px; }
  .view-container { padding: 16px 18px 80px; }
  .kd-band { margin: 56px 18px 0; height: 34px; }
  .sidebar { padding-top: 72px; } /* Platz für die feste Menü-Taste */
  .os-seg button, .tool-seg button { padding: 6px 11px; font-size: 0.8rem; }
  .os-switch, .tool-switch { padding-left: 116px; padding-right: 16px; min-height: 62px; }
  .os-switch ~ .kd-band, .tool-switch ~ .kd-band { margin-top: 4px; }
  header.hero { padding-top: 18px; }
  .stage-nav { flex-wrap: wrap; }
  .stage-nav .next.kd-weiter { flex: 1 1 100%; }
  .kd-lb { width: calc(100vw - 16px); }
  .kd-lb-buehne { height: 60vh; }
  .kd-lb-zur, .kd-lb-vor { display: none; }
}

/* ── Druck: nur das Zertifikat ──────────────────────────────────────────── */
/* Die Kurs-Styles blenden beim Druck .app aus — und damit auch das Zertifikat darin
   (leere Seite, in allen Kursen bis 23.09.2026) — und schalten zugleich ALLE Ansichten
   sichtbar. Hier: Rahmen sichtbar, Sidebar weg, nur die Zertifikat-Ansicht. */
@media print {
  .kd-band, .kd-abbinder, .kd-lb, .kd-gehirn-buehne, .kd-pfad { display: none !important; }
  /* nur in Kursen mit Zertifikat-Ansicht; Akademie-Lektionen drucken die ganze Lektion */
  body:has(#view-cert) .app { display: block !important; }
  body:has(#view-cert) .sidebar, body:has(#view-cert) .mobile-menu-btn, body:has(#view-cert) .os-switch, body:has(#view-cert) .tool-switch { display: none !important; }
  body:has(#view-cert) .view { display: none !important; }
  body:has(#view-cert) #view-cert { display: block !important; animation: none !important; }
  body:has(#view-cert) { background: white !important; }
}
@media (prefers-reduced-motion: reduce) {
  .nav-item.active .nav-num { animation: none; }
}
@media (forced-colors: active) {
  .nav-num, .stage-card, .kd-pfad-knoten button { border: 1px solid CanvasText; }
  .brand-title, h1, .quiz-score { color: CanvasText; }
}