:root{--bg:#f4f8fc;--fg:#12263a;--mut:#5b7186;--card:#fff;--line:#d9e4ee;--acc:#2788d9;--acc2:#66c8ff;--shadow:0 20px 60px rgba(14,35,65,.14)}
:root[data-theme=dark]{--bg:#0b1522;--fg:#e6f0fa;--mut:#8ea5bb;--card:#122136;--line:#223650;--shadow:0 20px 60px rgba(0,0,0,.5)}
@media(prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#0b1522;--fg:#e6f0fa;--mut:#8ea5bb;--card:#122136;--line:#223650;--shadow:0 20px 60px rgba(0,0,0,.5)}}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 'DM Sans','Segoe UI',system-ui,sans-serif}
a{color:inherit}
code,pre{font-family:ui-monospace,Consolas,monospace}
.nav{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;padding:12px max(16px,5vw);background:color-mix(in srgb,var(--bg) 80%,transparent);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;text-decoration:none}
.nav nav{display:flex;align-items:center;gap:20px}
.nav nav a{text-decoration:none;color:var(--mut);font-size:15px}
.nav nav a:hover{color:var(--fg)}
.icon-btn{border:1px solid var(--line);background:var(--card);color:var(--fg);width:34px;height:34px;border-radius:10px;cursor:pointer;font-size:16px}
.hero{text-align:center;padding:96px max(16px,5vw) 56px;background:radial-gradient(ellipse at 50% 0,rgba(102,200,255,.28),transparent 60%)}
.eyebrow{color:var(--acc);font-weight:600;font-size:14px;margin:0 0 12px}
h1{font-size:clamp(38px,7vw,72px);line-height:1.05;margin:0 0 18px;letter-spacing:-.02em}
.grad{background:linear-gradient(90deg,var(--acc),var(--acc2));-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{max-width:560px;margin:0 auto 28px;color:var(--mut);font-size:19px}
.cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;padding:11px 22px;border-radius:12px;border:1px solid var(--line);background:var(--card);text-decoration:none;font-weight:600;cursor:pointer;color:var(--fg);font-size:15px;font-family:inherit}
.btn.primary{background:linear-gradient(135deg,var(--acc),#4aa9f0);border-color:transparent;color:#fff}
.btn.danger{color:#d33}
.section{max-width:1080px;margin:0 auto;padding:56px 16px}
h2{font-size:clamp(26px,4vw,38px);margin:0 0 6px;letter-spacing:-.01em}
.sub{color:var(--mut);margin:0 0 24px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;margin-top:24px}
.grid article{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:20px}
.grid p{margin:6px 0 0;color:var(--mut);font-size:15px}
pre{background:#0d1a2b;color:#cfe8ff;padding:18px 20px;border-radius:14px;overflow:auto;margin:0 0 14px}
.foot{display:flex;justify-content:space-between;max-width:1080px;margin:0 auto;padding:32px 16px;color:var(--mut);border-top:1px solid var(--line);font-size:14px}
/* Demo-Desktop */
.desk{position:relative;height:460px;border-radius:18px;overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--line);user-select:none;color:#12263a}
.wall{position:absolute;inset:0;background:linear-gradient(145deg,#1d4666,#4589a8 40%,#a8d6df 75%,#e1eee9)}
.icons{position:absolute;top:12px;left:12px;display:flex;flex-direction:column;gap:6px}
.icons button{background:none;border:0;color:#fff;width:74px;padding:6px 2px;border-radius:8px;cursor:pointer;font-size:26px;line-height:1.2;text-shadow:0 1px 4px rgba(0,0,0,.4)}
.icons button:hover{background:rgba(255,255,255,.18)}
.icons span{display:block;font-size:12px}
.wins{position:absolute;inset:0 0 40px 0;pointer-events:none}
.win{position:absolute;pointer-events:auto;width:300px;min-height:170px;background:rgba(250,252,255,.96);border-radius:10px;box-shadow:0 12px 40px rgba(0,0,0,.35);display:flex;flex-direction:column;overflow:hidden;border:1px solid rgba(255,255,255,.6)}
.win header{display:flex;align-items:center;justify-content:space-between;padding:6px 6px 6px 12px;background:rgba(220,232,244,.95);cursor:grab;font-size:13px;font-weight:600}
.win header button{border:0;background:none;width:26px;height:24px;border-radius:6px;cursor:pointer;font-size:14px}
.win header button:hover{background:rgba(0,0,0,.1)}
.win .body{flex:1;padding:8px;display:flex;flex-direction:column;gap:6px;font-size:13px}
.win textarea{flex:1;min-height:100px;border:1px solid var(--line);border-radius:8px;padding:8px;font:13px/1.4 inherit;resize:none;background:#fff;color:#12263a}
.win .row{display:flex;gap:6px}
.win .row button{border:1px solid #c4d4e3;background:#fff;border-radius:7px;padding:4px 10px;cursor:pointer;font-size:12px}
.flist{list-style:none;margin:0;padding:0}
.flist li{padding:5px 8px;border-radius:6px;cursor:default;display:flex;justify-content:space-between}
.flist li:hover{background:#e3eef9}
.flist small{color:#6b8196}
.term{background:#0d1a2b;color:#bfe3ff;font:12px/1.5 ui-monospace,Consolas,monospace;border-radius:8px;padding:8px;flex:1;min-height:100px;overflow:auto;white-space:pre-wrap}
.term input{background:none;border:0;outline:0;color:inherit;font:inherit;width:70%}
.bigclock{font-size:44px;font-weight:700;text-align:center;margin:auto;font-variant-numeric:tabular-nums}
.task{position:absolute;left:0;right:0;bottom:0;height:40px;background:rgba(240,246,252,.88);backdrop-filter:blur(14px);display:flex;align-items:center;gap:8px;padding:0 10px}
.start{border:0;background:none;cursor:pointer;padding:6px;border-radius:8px}
.start:hover{background:rgba(0,0,0,.08)}
.tasks{flex:1;display:flex;gap:6px;overflow:hidden}
.tasks button{border:0;background:rgba(255,255,255,.7);border-radius:7px;padding:5px 12px;font-size:12px;cursor:pointer}
.tasks button.on{background:#fff;box-shadow:inset 0 -2px var(--acc)}
.tray{font-size:12px;font-weight:600}


.foot-links{display:flex;gap:14px;flex-wrap:wrap}.foot-links a{color:inherit}

/* Bedienung und Barrierefreiheit */
.skip{position:absolute;left:-999px;top:8px;background:var(--card);color:var(--fg);padding:8px 14px;border-radius:8px;border:1px solid var(--line);z-index:50}
.skip:focus{left:12px}
:focus-visible{outline:2px solid var(--acc);outline-offset:2px}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}
img,svg{max-width:100%}
.icons button .ic{display:block;font-size:26px;line-height:1.2}
.icons button span:last-child{display:block;font-size:12px}
/* Demo: neue Apps */
.fpath{font-size:12px;color:#6b8196;padding:0 4px}
.flist li.folder{cursor:pointer}
.flist li:focus-visible{outline:2px solid var(--acc)}
.win .row.wrap{flex-wrap:wrap}
.win .hint{color:#6b8196;line-height:1.4}
.win .body>button{align-self:flex-start;border:1px solid #c4d4e3;background:#fff;border-radius:7px;padding:6px 12px;cursor:pointer;font-size:12px}
.calc-out{background:#0d1a2b;color:#cfe8ff;border-radius:8px;padding:8px 10px;text-align:right;font:600 20px/1.3 ui-monospace,Consolas,monospace;min-height:38px;overflow:hidden;text-overflow:ellipsis}
.calc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}
.calc-grid button,.calc-out+.calc-grid+button{border:1px solid #c4d4e3;background:#fff;border-radius:7px;padding:8px 0;cursor:pointer;font-size:15px}
.calc-grid button:hover{background:#e3eef9}
.win .body>button.wide{align-self:stretch}
/* Handy und Tablet */
@media(max-width:900px){.nav nav{gap:14px}.grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}}
@media(max-width:640px){
  body{font-size:16px}
  .nav{flex-wrap:wrap;gap:8px;padding:10px 16px}
  .nav nav{width:100%;overflow-x:auto;gap:4px;padding-bottom:2px;-webkit-overflow-scrolling:touch;scrollbar-width:none}
  .nav nav::-webkit-scrollbar{display:none}
  .nav nav a{flex:none;padding:8px 12px;min-height:40px;display:inline-flex;align-items:center;border-radius:10px;background:var(--card);border:1px solid var(--line)}
  .icon-btn{flex:none;width:40px;height:40px}
  .hero{padding:48px 16px 32px}
  .lead{font-size:17px}
  .btn{padding:12px 20px;min-height:44px}
  .section{padding:36px 16px}
  .grid{grid-template-columns:1fr}
  .desk{height:520px}
  .icons{flex-direction:row;flex-wrap:wrap;left:8px;right:8px;top:8px;gap:2px}
  .icons button{width:25%;min-width:64px;min-height:56px}
  .wins{inset:90px 0 44px 0}
  .win{position:absolute;left:8px!important;right:8px;top:6px!important;width:auto;max-height:100%;min-height:150px}
  .win header{cursor:default;min-height:40px}
  .win header button{width:40px;height:36px}
  .win textarea{min-height:140px;font-size:16px}
  .term input{font-size:16px}
  .task{height:44px}
  .tasks button{min-height:34px}
  .foot{flex-direction:column;gap:10px;align-items:flex-start}
  pre{font-size:13px}
}

/* Frontend-Installation */
.install-box{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:20px;max-width:720px}
.install-box label{font-weight:600;display:block;margin-bottom:6px}
.install-box input{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:var(--bg);color:var(--fg);font:inherit}
.install-box .hint{color:var(--mut);font-size:14px;margin:6px 0 12px}
.install-box pre{margin:0 0 12px;white-space:pre-wrap;overflow-wrap:anywhere}
.cta.left{justify-content:flex-start}