:root{
  --bg:#0A0A0B; --surface:#121214; --surface-2:#18181B; --surface-3:#1f1f23;
  --text:#FAFAFA; --muted:#A1A1AA; --dim:#52525B;
  --accent:#EAB308; --accent-2:#CA8A04;
  --green:#4ADE80; --teal:#2dd4bf; --blue:#38BDF8; --red:#EF4444;
  --border:#26262b; --border-2:#33333a;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --head:"Cabinet Grotesk","JetBrains Mono",system-ui,sans-serif;
  --radius:14px; --maxw:1180px;
  --lpic1:#4ADE80; --lpic2:#38BDF8;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; background:var(--bg); color:var(--text);
  font-family:var(--mono); font-size:15px; line-height:1.65;
  -webkit-font-smoothing:antialiased;
  background-image:radial-gradient(circle at 12% -10%, rgba(234,179,8,.07), transparent 40%),radial-gradient(circle at 100% 0%, rgba(56,189,248,.06), transparent 35%);
  background-attachment:fixed;
}
::selection{background:var(--accent);color:#000}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--head);font-weight:800;letter-spacing:-.02em;line-height:1.08;margin:0}
p{margin:0 0 1rem}
img{max-width:100%}

/* decorative overlays */
.grain{position:fixed;inset:0;pointer-events:none;z-index:9998;opacity:.035;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");}
.scanline{position:fixed;inset:0;pointer-events:none;z-index:9997;opacity:.4;
  background:repeating-linear-gradient(0deg,transparent 0 2px,rgba(0,0,0,.14) 2px 3px);mix-blend-mode:multiply}
#topbar-progress{position:fixed;top:0;left:0;height:3px;width:0;z-index:10000;
  background:linear-gradient(90deg,var(--accent),var(--green));box-shadow:0 0 12px var(--accent);transition:width .15s}

/* ---------- HEADER ---------- */
.site-header{position:sticky;top:0;z-index:100;backdrop-filter:blur(16px);
  background:rgba(10,10,11,.72);border-bottom:1px solid var(--border)}
.hd-inner{max-width:var(--maxw);margin:0 auto;padding:0 22px;height:64px;display:flex;align-items:center;gap:18px}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--head);font-weight:900;font-size:19px;letter-spacing:-.03em}
.brand .logo{width:34px;height:34px;border:1.5px solid var(--accent);border-radius:9px;display:grid;place-items:center;color:var(--accent);
  font-weight:800;box-shadow:0 0 18px rgba(234,179,8,.25);background:var(--surface)}
.brand .blink{animation:blink 1.1s steps(1) infinite;color:var(--accent)}
@keyframes blink{50%{opacity:0}}
.hd-nav{display:flex;gap:4px;margin-left:8px}
.hd-nav a{padding:8px 13px;border-radius:9px;color:var(--muted);font-size:13.5px;font-weight:500;transition:color .2s,background-color .2s}
.hd-nav a:hover{color:var(--text);background:var(--surface-2)}
.hd-nav a.on{color:var(--accent)}
.hd-right{margin-left:auto;display:flex;align-items:center;gap:10px}
.lang-toggle{display:flex;border:1px solid var(--border-2);border-radius:8px;overflow:hidden}
.lang-toggle button{background:transparent;border:0;color:var(--muted);font-family:var(--mono);font-size:12px;font-weight:700;padding:6px 10px;cursor:pointer;transition:.2s}
.lang-toggle button.on{background:var(--accent);color:#000}
.burger{display:none;background:var(--surface-2);border:1px solid var(--border-2);color:var(--text);width:40px;height:38px;border-radius:9px;cursor:pointer;font-size:18px}

/* ---------- LAYOUT ---------- */
.layout{max-width:var(--maxw);margin:0 auto;display:grid;grid-template-columns:270px 1fr;gap:30px;padding:26px 22px 60px;align-items:start}
.sidebar{position:sticky;top:88px;max-height:calc(100vh - 110px);overflow-y:auto;
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px;scrollbar-width:thin}
.sidebar::-webkit-scrollbar{width:6px}.sidebar::-webkit-scrollbar-thumb{background:var(--border-2);border-radius:3px}
.side-group{margin-bottom:18px}
.side-title{display:flex;align-items:center;gap:8px;font-family:var(--head);font-weight:800;font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--dim);margin:0 6px 8px}
.side-title .dot{width:8px;height:8px;border-radius:50%}
.nav-topic{display:flex;align-items:center;gap:9px;padding:7px 10px;border-radius:8px;color:var(--muted);font-size:12.7px;transition:background-color .18s,color .18s;border:1px solid transparent}
.nav-topic:hover{background:var(--surface-2);color:var(--text)}
.nav-topic.active{background:var(--surface-2);color:var(--text);border-color:var(--border-2)}
.nav-topic .tid{font-size:10.5px;color:var(--dim);min-width:26px;font-weight:700}
.nav-topic.done .tid::after{content:" ✓";color:var(--green)}
.app-main{min-width:0}
.sidebar-scrim{display:none}

/* ---------- COMPONENTS ---------- */
.crumbs{color:var(--dim);font-size:12.5px;margin-bottom:20px}
.crumbs a:hover{color:var(--accent)}
.crumbs span{color:var(--muted)}
.btn{display:inline-flex;align-items:center;gap:9px;padding:12px 20px;border-radius:11px;font-family:var(--head);font-weight:700;font-size:14px;cursor:pointer;border:1px solid transparent;transition:transform .12s,background-color .2s,border-color .2s;user-select:none}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--accent);color:#000;box-shadow:0 6px 24px -8px rgba(234,179,8,.6)}
.btn-primary:hover{background:var(--accent-2)}
.btn-ghost{background:var(--surface-2);color:var(--text);border-color:var(--border-2)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
.btn-sm{padding:8px 14px;font-size:13px;border-radius:9px}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius)}
.tag{display:inline-flex;align-items:center;gap:6px;font-size:11px;font-weight:700;padding:4px 10px;border-radius:999px;background:var(--surface-2);border:1px solid var(--border-2);color:var(--muted)}

/* ---------- HERO ---------- */
.hero{position:relative;overflow:hidden;border-radius:20px;border:1px solid var(--border);background:var(--surface);
  padding:52px 44px;margin-bottom:34px;background-image:linear-gradient(135deg,rgba(234,179,8,.06),transparent 55%),linear-gradient(300deg,rgba(56,189,248,.05),transparent 50%)}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);background-size:34px 34px;mask-image:radial-gradient(circle at 30% 20%,#000,transparent 75%)}
.hero>*{position:relative}
.hero .kicker{display:inline-flex;align-items:center;gap:9px;font-size:12px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);border:1px solid var(--border-2);padding:6px 13px;border-radius:999px;background:var(--surface-2);margin-bottom:22px}
.hero h1{font-size:clamp(2.3rem,5.5vw,4rem);font-weight:900;margin-bottom:18px}
.hero h1 .g{background:linear-gradient(120deg,var(--green),var(--teal),var(--blue));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{color:var(--muted);font-size:16px;max-width:620px;margin-bottom:28px}
.hero-cta{display:flex;gap:13px;flex-wrap:wrap}
.hero-stats{display:flex;gap:34px;margin-top:38px;flex-wrap:wrap}
.hero-stats .st b{font-family:var(--head);font-size:30px;font-weight:900;display:block;line-height:1}
.hero-stats .st span{color:var(--dim);font-size:12px;text-transform:uppercase;letter-spacing:.08em}

/* course path cards */
.grid{display:grid;gap:18px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.sec-title{font-family:var(--head);font-weight:800;font-size:13px;letter-spacing:.1em;text-transform:uppercase;color:var(--dim);margin:36px 0 16px;display:flex;align-items:center;gap:12px}
.sec-title::after{content:"";flex:1;height:1px;background:var(--border)}
.pathcard{display:block;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:26px;transition:transform .18s,border-color .2s,box-shadow .2s;position:relative;overflow:hidden}
.pathcard:hover{transform:translateY(-3px);border-color:var(--c,var(--accent));box-shadow:0 18px 40px -22px var(--c,var(--accent))}
.pathcard .badge{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;font-family:var(--head);font-weight:900;font-size:15px;color:#000;margin-bottom:16px}
.pathcard h3{font-size:22px;margin-bottom:6px}
.pathcard .sub{color:var(--c);font-size:12.5px;font-weight:700;margin-bottom:12px}
.pathcard p{color:var(--muted);font-size:13.5px;margin:0}
.pathcard .mini-prog{margin-top:16px;height:6px;border-radius:99px;background:var(--surface-3);overflow:hidden}
.pathcard .mini-prog i{display:block;height:100%;background:var(--c,var(--accent));border-radius:99px;transition:width .5s}
.topic-card .tw{font-size:11px;color:var(--dim)}
.topic-card h4{font-size:16px;margin:6px 0 8px}
.feat{padding:22px;border-radius:var(--radius);border:1px solid var(--border);background:var(--surface)}
.feat .ic{width:40px;height:40px;border-radius:10px;background:var(--surface-2);border:1px solid var(--border-2);display:grid;place-items:center;color:var(--accent);margin-bottom:14px}
.feat h4{font-size:15px;margin-bottom:6px}
.feat p{color:var(--muted);font-size:13px;margin:0}

/* ---------- LESSON CONTENT ---------- */
.topic-head{border-bottom:1px solid var(--border);padding-bottom:22px;margin-bottom:26px}
.topic-head h1{font-size:clamp(1.7rem,3.5vw,2.5rem);margin:10px 0 10px}
.topic-head .summary{color:var(--muted);max-width:720px}
.lesson{margin-bottom:22px}
.lesson h3{font-size:19px;margin-bottom:12px;display:flex;align-items:center;gap:10px}
.lesson h3::before{content:"";width:4px;height:20px;background:var(--accent);border-radius:2px}
.prose{color:#d4d4d8}
.prose p{margin:0 0 14px}
.prose code{font-family:var(--mono);background:var(--surface-2);border:1px solid var(--border-2);padding:1px 6px;border-radius:5px;font-size:13px;color:var(--green)}
.prose ul,.prose ol{margin:0 0 14px;padding-left:22px}
.prose li{margin:4px 0}
.prose b{color:var(--text)}
.prose pre{background:#08080a;border:1px solid var(--border-2);border-radius:11px;padding:16px 18px;overflow-x:auto;margin:0 0 16px;position:relative}
.prose pre::before{content:"● ● ●";position:absolute;top:9px;left:14px;font-size:8px;letter-spacing:3px;color:#3f3f46}
.prose pre code{background:none;border:0;padding:0;color:#e4e4e7;display:block;padding-top:16px;font-size:13px;line-height:1.7}
.prose pre .pr{color:var(--accent);user-select:none}
.prose pre .cm{color:#71717a;font-style:italic}
.callout{border:1px solid var(--border-2);border-left:3px solid var(--blue);background:var(--surface-2);border-radius:10px;padding:14px 16px;margin:0 0 16px;font-size:13.5px}
.callout.tip{border-left-color:var(--green)}
.callout.warn{border-left-color:var(--red)}
.callout b{color:var(--text)}

/* commands table */
.cmd-table{margin-top:8px}
.cmd-row{display:grid;grid-template-columns:minmax(150px,240px) 1fr;gap:14px;padding:10px 14px;border:1px solid var(--border);border-radius:9px;margin-bottom:8px;background:var(--surface);align-items:center}
.cmd-row code{color:var(--accent);font-weight:700;font-size:13px}
.cmd-row span{color:var(--muted);font-size:13px}

/* quiz */
.quizbox{margin-top:14px}
.qcard{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px;margin-bottom:14px}
.qcard .qq{font-weight:700;margin-bottom:14px;font-family:var(--head);font-size:15.5px}
.opt{display:flex;align-items:flex-start;gap:11px;padding:11px 14px;border:1px solid var(--border-2);border-radius:9px;margin-bottom:8px;cursor:pointer;transition:border-color .18s,background-color .18s;font-size:13.5px}
.opt:hover{border-color:var(--accent)}
.opt .k{width:22px;height:22px;border-radius:6px;border:1px solid var(--border-2);display:grid;place-items:center;font-size:11px;font-weight:700;flex:none;color:var(--muted)}
.opt.correct{border-color:var(--green);background:rgba(74,222,128,.08)}
.opt.correct .k{background:var(--green);color:#000;border-color:var(--green)}
.opt.wrong{border-color:var(--red);background:rgba(239,68,68,.08)}
.opt.wrong .k{background:var(--red);color:#fff;border-color:var(--red)}
.opt.picked{border-color:var(--accent)}
.explain{margin-top:8px;padding:12px 14px;border-radius:9px;background:var(--surface-2);border:1px solid var(--border-2);font-size:13px;color:var(--muted);display:none}
.explain.show{display:block}
.explain b{color:var(--green)}

/* topic footer nav */
.topic-foot{display:flex;justify-content:space-between;gap:14px;margin-top:32px;border-top:1px solid var(--border);padding-top:22px}
.foot-link{display:flex;flex-direction:column;gap:2px;padding:14px 18px;border:1px solid var(--border);border-radius:11px;background:var(--surface);transition:border-color .2s;max-width:48%}
.foot-link:hover{border-color:var(--accent)}
.foot-link small{color:var(--dim);font-size:11px}
.foot-link b{font-size:13px}
.foot-link.next{text-align:right;align-items:flex-end}

/* ---------- EXAM SIMULATOR ---------- */
.exam-intro{text-align:center;max-width:640px;margin:0 auto;padding:40px 0}
.exam-intro .ring{width:120px;height:120px;margin:0 auto 24px}
.exam-meta{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;margin:22px 0 28px}
.exam-meta .m{background:var(--surface);border:1px solid var(--border);border-radius:11px;padding:14px 20px;min-width:110px}
.exam-meta .m b{display:block;font-family:var(--head);font-size:22px;font-weight:900}
.exam-meta .m span{font-size:11px;color:var(--dim);text-transform:uppercase;letter-spacing:.06em}
.exam-bar{position:sticky;top:72px;z-index:40;display:flex;align-items:center;gap:16px;background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:12px 18px;margin-bottom:20px}
.exam-bar .timer{font-family:var(--head);font-weight:900;font-size:20px;color:var(--accent)}
.exam-bar .timer.warn{color:var(--red);animation:blink 1s steps(1) infinite}
.exam-bar .prog{flex:1;height:8px;background:var(--surface-3);border-radius:99px;overflow:hidden}
.exam-bar .prog i{display:block;height:100%;background:var(--accent);transition:width .3s}
.exam-q-nav{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:20px}
.exam-q-nav button{width:34px;height:34px;border-radius:8px;border:1px solid var(--border-2);background:var(--surface);color:var(--muted);font-family:var(--mono);font-size:12px;font-weight:700;cursor:pointer;transition:.15s}
.exam-q-nav button.answered{border-color:var(--accent);color:var(--accent)}
.exam-q-nav button.cur{background:var(--accent);color:#000;border-color:var(--accent)}
.result-hero{text-align:center;padding:34px}
.result-score{font-family:var(--head);font-size:72px;font-weight:900;line-height:1}
.result-score.pass{color:var(--green)}.result-score.fail{color:var(--red)}

/* ---------- GLOSSARY ---------- */
.glo-toolbar{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin-bottom:18px}
.glo-search{flex:1;min-width:220px;position:relative}
.glo-search input{width:100%;background:var(--surface);border:1px solid var(--border-2);border-radius:11px;padding:13px 16px 13px 42px;color:var(--text);font-family:var(--mono);font-size:14px}
.glo-search input:focus{outline:none;border-color:var(--accent)}
.glo-search .si{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--dim)}
.cat-pills{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px}
.cat-pills button{background:var(--surface);border:1px solid var(--border-2);color:var(--muted);border-radius:999px;padding:7px 14px;font-family:var(--mono);font-size:12px;font-weight:600;cursor:pointer;transition:.18s}
.cat-pills button.on{background:var(--accent);color:#000;border-color:var(--accent)}
.diagram-card{border:1px solid var(--border);background:var(--surface);border-radius:14px;padding:22px;margin-bottom:22px}
.diagram-card h4{font-size:14px;color:var(--accent);margin-bottom:14px;letter-spacing:.04em;text-transform:uppercase}
.diagram-card svg{width:100%;height:auto;max-width:760px;display:block;margin:0 auto}
.glo-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:16px}
.glo-card{background:var(--surface);border:1px solid var(--border);border-radius:13px;padding:20px;transition:transform .16s,border-color .2s}
.glo-card:hover{transform:translateY(-2px);border-color:var(--accent)}
.glo-card .gt{display:flex;justify-content:space-between;align-items:flex-start;gap:10px;margin-bottom:8px}
.glo-card h4{font-size:16px}
.glo-card .cat{font-size:10px;font-weight:700;color:var(--accent);border:1px solid var(--border-2);padding:3px 9px;border-radius:999px;white-space:nowrap}
.glo-card .def{color:var(--muted);font-size:13px;margin-bottom:12px}
.glo-box{border-radius:9px;padding:10px 12px;font-size:12px;margin-top:8px}
.glo-box.use{background:rgba(56,189,248,.06);border:1px solid rgba(56,189,248,.25)}
.glo-box.cmd{background:#08080a;border:1px solid var(--border-2)}
.glo-box .lbl{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--dim);display:block;margin-bottom:4px}
.glo-box.cmd pre{margin:0;color:var(--green);font-size:12.5px;white-space:pre-wrap}
.glo-box.use p{margin:0;color:#cbd5e1}

/* toast */
#toast{position:fixed;bottom:26px;left:50%;transform:translateX(-50%) translateY(30px);z-index:10001;background:var(--surface-2);border:1px solid var(--green);color:var(--text);padding:14px 22px;border-radius:12px;font-weight:600;font-size:14px;opacity:0;transition:.35s;box-shadow:0 20px 50px -20px #000;pointer-events:none}
#toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* footer */
.site-footer{border-top:1px solid var(--border);margin-top:40px}
.ft-inner{max-width:var(--maxw);margin:0 auto;padding:30px 22px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;color:var(--dim);font-size:12.5px}
.ft-inner a:hover{color:var(--accent)}

.fade-in{animation:fadeIn .4s ease both}
@keyframes fadeIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.empty{text-align:center;color:var(--dim);padding:60px 20px}

/* ---------- RESPONSIVE ---------- */
@media(max-width:900px){
  .layout{grid-template-columns:1fr;padding:18px 16px 50px}
  .sidebar{position:fixed;top:0;left:0;bottom:0;width:280px;max-height:100vh;z-index:200;border-radius:0;transform:translateX(-100%);transition:transform .28s;padding-top:20px}
  .sidebar.open{transform:none}
  .sidebar-scrim.show{display:block;position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:150}
  .hd-nav{display:none}
  .burger{display:block}
  .grid-2,.grid-3{grid-template-columns:1fr}
  .hero{padding:34px 22px}
  .glo-grid{grid-template-columns:1fr}
}
@media(min-width:901px){.burger{display:none}}

/* print */
@media print{
  .site-header,.sidebar,.site-footer,.grain,.scanline,#topbar-progress,.burger,.exam-bar,.exam-q-nav,.btn{display:none!important}
  body{background:#fff;color:#000}
  .layout{display:block;padding:0}
  .card,.qcard,.glo-card{border-color:#ccc;break-inside:avoid}
  .explain{display:block!important}
}

/* ===== v7 Erweiterungen ===== */

/* Mini-Tabellen in Lektionen */
.mini-table { width:100%; border-collapse:collapse; margin:12px 0; font-size:13px; }
.mini-table th { background:var(--surface2); color:var(--accent); padding:6px 10px; text-align:left; font-size:11px; letter-spacing:.05em; }
.mini-table td { padding:6px 10px; border-bottom:1px solid var(--border); vertical-align:top; }
.mini-table tr:last-child td { border-bottom:none; }
.mini-table code { background:var(--surface2); padding:1px 5px; border-radius:3px; }

/* IHK-Aufgaben */
.ihk-card { padding:22px 24px; margin-bottom:16px; }
.ihk-head { display:flex; justify-content:space-between; align-items:center; margin-bottom:8px; }
.ihk-pts { font-size:13px; font-weight:700; color:var(--accent); background:var(--surface2); padding:3px 10px; border-radius:4px; }
.ihk-situation { background:var(--surface2); border-left:3px solid var(--accent); padding:10px 14px; margin:10px 0 14px; font-size:13.5px; color:var(--muted); border-radius:0 6px 6px 0; }
.ihk-aufgabe { border-top:1px solid var(--border); padding:12px 0 8px; }
.ihk-aufg-head { display:flex; justify-content:space-between; align-items:center; margin-bottom:6px; }
.ihk-nr { font-weight:700; font-size:12px; color:var(--accent); letter-spacing:.05em; text-transform:uppercase; }
.ihk-ap { font-size:12px; color:var(--dim); }
.ihk-sol { margin-top:10px; padding:12px; background:rgba(57,211,83,.07); border-left:3px solid #39d353; border-radius:0 6px 6px 0; }

/* Stagger animation for extra lessons */
.stagger { animation-delay: .08s; }
.stagger:nth-child(2) { animation-delay: .16s; }
.stagger:nth-child(3) { animation-delay: .24s; }

/* Smooth transitions: page transitions */
#app { animation: pagein .22s cubic-bezier(.4,0,.2,1); }
@keyframes pagein { from { opacity:0; transform:translateY(8px); } to { opacity:1; transform:none; } }

/* Glossar Download-Buttons */
.glo-toolbar { display:flex; gap:10px; align-items:center; flex-wrap:wrap; margin-bottom:8px; }

/* Verbesserte Card-Hover-Übergänge */
.card { transition: box-shadow .18s ease, transform .15s ease; }
.card:hover { box-shadow: 0 4px 24px rgba(0,0,0,.18); }

/* Lesson border accent animation */
.lesson[style*="border-left"] { position:relative; overflow:hidden; }
.lesson[style*="border-left"]::after {
  content:''; position:absolute; top:0; left:0; width:3px; height:0;
  background:var(--accent); transition:height .4s ease;
}
.lesson[style*="border-left"]:hover::after { height:100%; }

/* Glossar-Karten Verbesserung */
.glo-card { transition:background .15s, box-shadow .15s; }
.glo-card:hover { background:var(--surface2); }