/* Flux – Stil der statischen Seiten (Klassen, Fächer, Themen, Übersicht). Gleiche Designsprache wie die App. */
@font-face{font-family:'Plus Jakarta Sans';font-style:normal;font-weight:400 800;font-display:swap;src:url(/assets/fonts/PlusJakartaSans.woff2) format('woff2')}
@font-face{font-family:'Space Grotesk';font-style:normal;font-weight:500 700;font-display:swap;src:url(/assets/fonts/SpaceGrotesk.woff2) format('woff2')}
:root{
  --bg1:#160d38;--bg2:#341a66;--bg3:#0d2757;
  --ink:#1c1f36;--ink2:#2a2d44;--muted:#646a8c;--line:#ecebf5;--soft:#f5f4fc;
  --violet:#7c5cff;--violet2:#5a3df0;--violet-soft:#f1eeff;--good:#1aa251;--good-bg:#e9f9ef;
  --ac:#6d4df0;--ac2:#4a2fc7;--r:24px;
  --font:'Plus Jakarta Sans',"Segoe UI",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  --display:'Space Grotesk','Plus Jakarta Sans',"Segoe UI",system-ui,sans-serif;
  --shadow:0 1px 2px rgba(20,10,60,.08),0 18px 44px -18px rgba(10,5,40,.55);
  --shadow-lg:0 2px 4px rgba(20,10,60,.08),0 30px 60px -22px rgba(10,5,40,.65);
  --ease:cubic-bezier(.2,.8,.2,1);
  color-scheme:light;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--ink);line-height:1.6;min-height:100vh;
  background:#1b1140 linear-gradient(135deg,var(--bg1),var(--bg2) 55%,var(--bg3)) fixed;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
body::before{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:radial-gradient(55% 42% at 6% -4%,rgba(255,140,60,.28),transparent 70%),
             radial-gradient(48% 40% at 104% 104%,rgba(76,111,255,.32),transparent 70%),
             radial-gradient(38% 28% at 72% 8%,rgba(124,92,255,.3),transparent 70%)}
a{color:var(--violet2)}
img{max-width:100%}
:focus-visible{outline:3px solid #ffd84d;outline-offset:2px;border-radius:6px}
.card :focus-visible{outline-color:#5a3df0}
.wrap{width:100%;max-width:1000px;margin:0 auto;padding:0 16px;padding-left:max(16px,env(safe-area-inset-left));padding-right:max(16px,env(safe-area-inset-right))}

/* ---------- Kopfzeile ---------- */
.site-head{position:sticky;top:0;z-index:30;background:rgba(22,13,56,.72);backdrop-filter:saturate(1.4) blur(14px);-webkit-backdrop-filter:saturate(1.4) blur(14px);border-bottom:1px solid rgba(255,255,255,.08)}
.site-head .wrap{display:flex;align-items:center;gap:12px;height:64px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-family:var(--display);font-weight:700;font-size:21px;letter-spacing:-.02em}
.brand img{width:36px;height:36px;border-radius:12px;box-shadow:0 8px 18px -6px rgba(255,122,24,.7)}
.head-nav{margin-left:auto;display:flex;gap:6px;align-items:center}
.head-nav a{color:#e6e1ff;text-decoration:none;font-weight:700;font-size:14px;padding:9px 14px;border-radius:999px;transition:background .15s}
.head-nav a:hover{background:rgba(255,255,255,.1)}
.head-nav a.cta{background:linear-gradient(135deg,#ffd84d,#ff9d3d);color:#5a2a00;box-shadow:0 10px 22px -10px rgba(255,157,61,.85)}
.head-nav a.cta:hover{filter:brightness(1.05)}

/* ---------- Brotkrumen ---------- */
.crumbs{display:flex;flex-wrap:wrap;gap:6px;align-items:center;color:rgba(255,255,255,.6);font-size:13px;font-weight:600;margin:22px 0 14px;padding:0;list-style:none}
.crumbs li{display:flex;align-items:center;gap:6px}
.crumbs li+li::before{content:"›";opacity:.6}
.crumbs a{color:rgba(255,255,255,.85);text-decoration:none}
.crumbs a:hover{color:#fff;text-decoration:underline}

/* ---------- Kopfkarte (Hero) ---------- */
.hero-card{position:relative;overflow:hidden;border-radius:30px;padding:32px 30px 30px;color:#fff;
  background:linear-gradient(135deg,var(--ac),var(--ac2));box-shadow:var(--shadow-lg);border:1px solid rgba(255,255,255,.18)}
.hero-card::before{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(110% 80% at 100% 0%,rgba(255,255,255,.18),transparent 55%)}
.hero-card::after{content:"";position:absolute;right:-60px;bottom:-80px;width:260px;height:260px;border-radius:50%;pointer-events:none;
  background:radial-gradient(circle,rgba(255,216,77,.22),transparent 65%)}
.hero-card>*{position:relative;z-index:1}
.hc-top{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-bottom:16px}
.hc-ic{width:58px;height:58px;border-radius:18px;display:grid;place-items:center;font-size:31px;background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.28);margin-right:4px}
.hc-ic.num{font-family:var(--display);font-weight:700;font-size:30px;letter-spacing:-.03em}
.chip{background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.26);border-radius:999px;padding:5px 12px;font-size:12.5px;font-weight:700;white-space:nowrap}
.hero-card h1{font-family:var(--display);font-size:clamp(29px,5.2vw,46px);line-height:1.06;letter-spacing:-.03em;margin:0 0 12px;text-wrap:balance;text-shadow:0 1px 2px rgba(0,0,0,.12)}
.hc-sub{font-size:clamp(16px,2.1vw,18px);margin:0 0 18px;max-width:720px;opacity:.97;text-wrap:pretty}
.hc-facts{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 22px;padding:0;list-style:none}
.hc-facts li{background:rgba(0,0,0,.14);border-radius:12px;padding:7px 12px;font-weight:700;font-size:14px}
.hc-cta{display:flex;flex-wrap:wrap;gap:10px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none;font-weight:800;border-radius:16px;padding:14px 22px;font-size:16px;line-height:1.2;
  transition:transform .15s var(--ease),box-shadow .2s,filter .2s;border:0;cursor:pointer}
.btn:hover{transform:translateY(-2px)}
.btn-gold{background:linear-gradient(135deg,#ffd84d,#ff9d3d);color:#5a2a00;box-shadow:0 14px 28px -12px rgba(255,157,61,.95),inset 0 1px 0 rgba(255,255,255,.45)}
.btn-ghost{background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.3)}
.btn-ghost:hover{background:rgba(255,255,255,.22)}
.btn-violet{background:linear-gradient(135deg,var(--violet),var(--violet2));color:#fff;box-shadow:0 12px 24px -10px rgba(90,61,240,.8)}

/* ---------- Inhaltskarten ---------- */
.card{background:#fff;border-radius:var(--r);box-shadow:var(--shadow);padding:28px;margin-top:18px;border:1px solid rgba(255,255,255,.6)}
.card h2{font-family:var(--display);font-size:clamp(22px,3.4vw,27px);letter-spacing:-.02em;margin:0 0 6px;line-height:1.2;color:var(--ink)}
.card h2 .k{color:var(--ac2)}
.card .lead{color:var(--muted);margin:0 0 20px;font-size:15.5px}
.card h3{font-family:var(--display);letter-spacing:-.01em}
.sec-h{color:#fff;font-family:var(--display);font-size:clamp(22px,3.6vw,28px);letter-spacing:-.02em;margin:36px 0 14px}

/* ---------- Erklärung (Lernschritte) ---------- */
.lsteps{list-style:none;margin:0;padding:0;counter-reset:ls}
.lsteps>li{position:relative;padding:2px 0 22px 58px;counter-increment:ls}
.lsteps>li:last-child{padding-bottom:0}
.lsteps>li::before{content:counter(ls);position:absolute;left:0;top:0;width:40px;height:40px;border-radius:13px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--ac),var(--ac2));color:#fff;font-family:var(--display);font-weight:700;font-size:18px;box-shadow:0 8px 16px -8px var(--ac2)}
.lsteps>li:not(:last-child)::after{content:"";position:absolute;left:19px;top:48px;bottom:6px;width:2px;border-radius:2px;background:var(--line)}
.lsteps h3{font-size:19px;margin:7px 0 6px;color:var(--ink)}
.lsteps p{margin:0;color:var(--ink2);font-size:16px}
.bsp{margin-top:12px;background:#f4f6ff;border-left:4px solid var(--ac);border-radius:12px;padding:12px 15px;white-space:pre-line;color:#33365a;font-size:15px;line-height:1.6}
.bsp::before{content:"Beispiel";display:block;font-size:11.5px;font-weight:800;letter-spacing:.07em;text-transform:uppercase;color:var(--ac2);margin-bottom:4px}

/* ---------- Lesetext ---------- */
.lesetext{background:#fffdf7;border:1px solid #f2e8cf;border-radius:18px;padding:20px 22px;white-space:pre-line;font-size:16.5px;line-height:1.75;color:#2d2a22}
.lesetext-t{font-family:var(--display);font-size:20px;margin:0 0 10px}

/* ---------- Übungsaufgaben ---------- */
.exs{list-style:none;margin:0;padding:0;display:grid;gap:12px;counter-reset:ex}
.ex{border:1px solid var(--line);border-radius:18px;padding:16px 18px 14px;counter-increment:ex;background:#fcfcff;transition:border-color .15s}
.ex:hover{border-color:#ddd6ff}
.ex-q{font-weight:700;margin:0 0 12px;display:flex;gap:12px;font-size:16px;line-height:1.45;color:var(--ink)}
.ex-q::before{content:counter(ex);flex:none;width:30px;height:30px;border-radius:10px;background:var(--violet-soft);color:var(--violet2);display:grid;place-items:center;font-size:13.5px;font-weight:800;border:1px solid #e3dcff}
.ex-hint{display:block;font-weight:600;font-size:13px;color:var(--muted);margin-top:2px}
.ex-o{list-style:none;margin:0 0 12px 42px;padding:0;display:grid;gap:7px}
.ex-o li{display:flex;gap:10px;align-items:flex-start;font-size:15.5px;color:var(--ink2);line-height:1.45}
.ex-o .k{flex:none;width:26px;height:26px;border-radius:8px;background:#fff;border:2px solid #e2e0f0;color:var(--violet);font-weight:800;font-size:12.5px;display:grid;place-items:center}
.ex details{margin-left:42px}
.ex summary{cursor:pointer;display:inline-flex;align-items:center;gap:7px;font-weight:800;font-size:14px;color:var(--violet2);padding:8px 14px;border-radius:999px;background:var(--violet-soft);list-style:none;user-select:none;transition:background .15s}
.ex summary:hover{background:#e7e1ff}
.ex summary::-webkit-details-marker{display:none}
.ex summary::before{content:"👀"}
.ex details[open] summary{background:var(--good-bg);color:#0c6b34}
.ex details[open] summary::before{content:"✅"}
.sol{margin-top:10px;background:var(--good-bg);border:1px solid #c6ebd3;border-radius:14px;padding:12px 14px;color:#0c5a2d;font-size:15px;line-height:1.55}
.sol b{display:block}
.sol p{margin:5px 0 0;color:#234a32}
.more{margin-top:20px;display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.more p{margin:0;color:var(--muted);font-size:14.5px;flex:1 1 260px}

.ex-h{font-size:18px;margin:22px 0 12px;color:var(--ink)}
.dlist{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:10px}
.dlist li{border:1px solid var(--line);border-radius:15px;padding:12px 15px;background:#fcfcff}
.dlist b{display:block;font-family:var(--display);font-size:19px;letter-spacing:-.01em;color:var(--ink)}
.dlist span{display:block;color:var(--muted);font-size:14px;margin-top:2px;line-height:1.45}

/* ---------- Übungs-Banner ---------- */
.uebung{display:flex;gap:18px;align-items:center;flex-wrap:wrap;background:linear-gradient(135deg,#2a2152,#191334);color:#fff;border-radius:var(--r);padding:22px 24px;margin-top:18px;box-shadow:var(--shadow);border:1px solid rgba(255,255,255,.1)}
.uebung .u-ic{font-size:36px}
.uebung .u-tx{flex:1 1 280px}
.uebung b{display:block;font-family:var(--display);font-size:20px;letter-spacing:-.01em}
.uebung span{color:#cdc7ee;font-size:14.5px}

/* ---------- Themen-Raster & Listen ---------- */
.tgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:10px}
.tlink{display:flex;gap:11px;align-items:center;text-decoration:none;color:var(--ink);border:1px solid var(--line);border-radius:15px;padding:11px 13px;font-weight:700;font-size:14.5px;line-height:1.3;background:#fcfcff;
  transition:border-color .15s,transform .15s var(--ease),box-shadow .15s}
.tlink:hover{border-color:var(--ac);transform:translateY(-2px);box-shadow:0 10px 20px -14px rgba(20,10,60,.5)}
.tlink .n{flex:none;width:32px;height:32px;border-radius:10px;background:linear-gradient(135deg,var(--ac),var(--ac2));color:#fff;display:grid;place-items:center;font-size:13.5px;font-family:var(--display);font-weight:700}
.tlink .n.ic{background:var(--soft);border:1px solid var(--line);font-size:17px}
.tlink.cur{border-color:var(--ac);background:var(--violet-soft)}
.trows{list-style:none;margin:0;padding:0}
.trow{display:flex;gap:14px;align-items:flex-start;text-decoration:none;color:var(--ink);padding:16px 6px;border-top:1px solid var(--line);border-radius:14px;transition:background .15s}
.trows li:first-child .trow{border-top:0}
.trow:hover{background:var(--soft)}
.trow .n{flex:none;width:44px;height:44px;border-radius:14px;background:linear-gradient(135deg,var(--ac),var(--ac2));color:#fff;display:grid;place-items:center;font-family:var(--display);font-weight:700;font-size:18px}
.trow .tx{flex:1;min-width:0}
.trow .tx b{display:block;font-size:17px;letter-spacing:-.005em}
.trow .tx span{display:block;color:var(--muted);font-size:14.5px;line-height:1.5;margin-top:2px}
.trow .go{align-self:center;color:var(--ac2);font-weight:800;white-space:nowrap;font-size:14px}
.pn{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-top:18px}
.pn a{flex:1 1 240px;display:flex;flex-direction:column;gap:2px;text-decoration:none;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);color:#fff;border-radius:18px;padding:14px 16px;transition:background .15s}
.pn a:hover{background:rgba(255,255,255,.15)}
.pn a small{color:#cdc7ee;font-weight:700;font-size:12.5px;text-transform:uppercase;letter-spacing:.06em}
.pn a b{font-size:16px}
.pn .next{text-align:right}

/* ---------- Fächer-Karten (Klassenseite) ---------- */
.fgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:14px;margin-top:18px}
.fcard{position:relative;overflow:hidden;display:flex;flex-direction:column;gap:4px;text-decoration:none;color:#fff;border-radius:24px;padding:20px;min-height:170px;
  background:linear-gradient(135deg,var(--fc1),var(--fc2));box-shadow:var(--shadow);border:1px solid rgba(255,255,255,.16);transition:transform .18s var(--ease),box-shadow .18s}
.fcard::before{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(120% 90% at 100% 0%,rgba(255,255,255,.2),transparent 55%)}
.fcard>*{position:relative}
.fcard:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.fcard .ic{width:50px;height:50px;border-radius:15px;display:grid;place-items:center;font-size:27px;background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.26)}
.fcard b{font-family:var(--display);font-size:21px;letter-spacing:-.015em;margin-top:10px}
.fcard .m{font-size:13px;font-weight:700;opacity:.92}
.fcard .tp{font-size:13px;opacity:.88;line-height:1.5;margin-top:6px}

/* ---------- Gesamtübersicht ---------- */
.ov-f{margin:18px 0 0}
.ov-f h3{display:flex;align-items:center;gap:9px;font-size:17px;margin:0 0 8px}
.ov-f h3 a{color:var(--ink);text-decoration:none}
.ov-f h3 a:hover{color:var(--violet2)}
.ov-f h3 .ic{width:32px;height:32px;border-radius:10px;display:grid;place-items:center;font-size:17px;background:var(--soft);border:1px solid var(--line)}
.ov-list{list-style:none;margin:0;padding:0;columns:3 220px;column-gap:24px}
.ov-list li{break-inside:avoid;padding:3px 0}
.ov-list a{color:var(--ink2);text-decoration:none;font-size:14.5px}
.ov-list a:hover{color:var(--violet2);text-decoration:underline}
.kl-nav{display:flex;flex-wrap:wrap;gap:8px}
.kl-nav a{display:inline-flex;align-items:center;gap:8px;text-decoration:none;color:var(--ink);font-weight:800;background:var(--soft);border:1px solid var(--line);border-radius:999px;padding:9px 16px;transition:border-color .15s}
.kl-nav a:hover{border-color:var(--violet)}
.kl-nav a.cur{background:var(--violet2);color:#fff;border-color:var(--violet2)}

/* ---------- Fußzeile ---------- */
.site-foot{margin-top:44px;padding:28px 0 42px;text-align:center;color:rgba(255,255,255,.55);font-size:13px;line-height:1.9;border-top:1px solid rgba(255,255,255,.08)}
.site-foot nav{margin-bottom:6px}
.site-foot a{color:rgba(255,255,255,.82);text-decoration:none;font-weight:600;margin:0 8px}
.site-foot a:hover{color:#fff;text-decoration:underline}

@media (max-width:600px){
  .hero-card{padding:26px 20px 24px;border-radius:26px}
  .card{padding:22px 18px}
  .ex{padding:14px 14px 12px}
  .ex-o,.ex details{margin-left:0}
  .head-nav .hide-s{display:none}
  .trow .go{display:none}
  .lsteps>li{padding-left:52px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}html{scroll-behavior:auto}}
@media print{
  body{background:#fff}body::before,.site-head,.site-foot,.hc-cta,.uebung,.pn,.more .btn{display:none!important}
  .hero-card{background:#fff!important;color:#000;box-shadow:none;border:1px solid #ccc}
  .card{box-shadow:none;border:1px solid #ddd}
  .ex details{display:block}.ex details>*{display:block}
}