/* Gleiche Farbwelt wie die App: Kartenblatt, Atlas-Blau, roter Stift. */
:root{
  --page:#e8eef1; --sheet:#fbfaf6; --sea:#a8d4ea; --seaDeep:#5f9fcb; --ink:#1f2a36; --muted:#5f6d78; --line:#c6d2d8;
  --navy:#17466b; --red:#d4302a; --redsoft:rgba(212,48,42,.10); --trail:#2f7a55; --amber:#d48a12;
  --display:"Barlow Condensed","Arial Narrow",system-ui,sans-serif;
  --body:"Source Sans 3",system-ui,-apple-system,"Segoe UI",sans-serif;
  --shadow:0 1px 2px rgba(23,70,107,.08),0 12px 32px -12px rgba(23,70,107,.28);
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --page:#0d1620; --sheet:#152230; --sea:#1b4462; --seaDeep:#0a1e30; --ink:#e1e8ee; --muted:#93a3af; --line:#2b3a48;
  --navy:#7cc0ef; --red:#ff6b5d; --redsoft:rgba(255,107,93,.14); --trail:#5cc28c; --amber:#f0a83a;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 12px 32px -12px rgba(0,0,0,.6); color-scheme:dark}}
:root[data-theme="dark"]{
  --page:#0d1620; --sheet:#152230; --sea:#1b4462; --seaDeep:#0a1e30; --ink:#e1e8ee; --muted:#93a3af; --line:#2b3a48;
  --navy:#7cc0ef; --red:#ff6b5d; --redsoft:rgba(255,107,93,.14); --trail:#5cc28c; --amber:#f0a83a;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 12px 32px -12px rgba(0,0,0,.6); color-scheme:dark}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--page);color:var(--ink);font:17px/1.55 var(--body);-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--navy)}
.wrap{max-width:1120px;margin:0 auto;padding:0 max(20px,env(safe-area-inset-left,0px))}
h1,h2,h3{font-family:var(--display);font-weight:700;letter-spacing:.01em;line-height:1.08;color:var(--navy);margin:0;text-wrap:balance}
h1{font-size:clamp(40px,6.4vw,68px)}
h2{font-size:clamp(30px,4vw,42px)}
h3{font-size:23px}
p{margin:0}
.dot{display:inline-block;width:.42em;height:.42em;border-radius:50%;background:var(--red);margin-left:.1em;vertical-align:.06em}
.eyebrow{font:700 13px var(--display);letter-spacing:.14em;text-transform:uppercase;color:var(--red);margin-bottom:10px}
.lead{font-size:clamp(18px,2vw,21px);color:var(--muted);max-width:36em}

/* Navigation */
nav{position:sticky;top:0;z-index:10;background:color-mix(in srgb,var(--page) 88%,transparent);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid transparent;transition:border-color .2s}
nav.scrolled{border-bottom-color:var(--line)}
nav .wrap{display:flex;align-items:center;gap:20px;height:64px}
.brand{font:700 26px var(--display);color:var(--navy);text-decoration:none;letter-spacing:.02em;white-space:nowrap}
nav ul{display:flex;gap:22px;list-style:none;margin:0 0 0 auto;padding:0}
nav ul a{color:var(--ink);text-decoration:none;font-weight:600;font-size:15px}
nav ul a:hover{color:var(--red)}
@media (max-width:760px){nav ul{display:none}nav .btn{margin-left:auto}}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:8px;height:46px;padding:0 22px;border-radius:8px;font:700 18px var(--display);letter-spacing:.04em;text-decoration:none;border:2px solid var(--red);background:var(--red);color:#fff;white-space:nowrap;transition:transform .15s,filter .15s}
.btn:hover{filter:brightness(1.08);transform:translateY(-1px)}
.btn.ghost{background:transparent;color:var(--navy);border-color:var(--line)}
.btn.ghost:hover{border-color:var(--navy)}
.btn.small{height:38px;padding:0 16px;font-size:16px}
.btn svg{width:18px;height:18px}

/* Hero */
.hero{padding:56px 0 40px;overflow:hidden}
.hero .wrap{display:grid;grid-template-columns:minmax(0,1fr);gap:40px}
.hero .cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.hero .note{margin-top:14px;font-size:14px;color:var(--muted)}
.shots{position:relative;margin-top:8px}
.sheet{background:var(--sheet);border:1px solid var(--line);border-radius:10px;padding:8px;box-shadow:var(--shadow)}
.sheet img{border-radius:5px}
.phone{position:absolute;right:-8px;bottom:-34px;width:min(26%,230px);background:#0f1b26;border-radius:28px;padding:7px;box-shadow:var(--shadow)}
.phone img{border-radius:22px}
@media (max-width:640px){.phone{display:none}}

/* Fakten */
.facts{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:10px;overflow:hidden;margin:70px 0 0}
.facts div{background:var(--sheet);padding:18px 20px}
.facts b{display:block;font:700 38px/1 var(--display);color:var(--navy)}
.facts span{font-size:15px;color:var(--muted)}
@media (max-width:640px){.facts{grid-template-columns:repeat(2,minmax(0,1fr))}}

section{padding:84px 0 0}
.head{max-width:680px;margin-bottom:36px}
.head .lead{margin-top:12px}

/* Schritte */
.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;counter-reset:s}
.step{background:var(--sheet);border:1px solid var(--line);border-radius:10px;padding:24px}
.step::before{counter-increment:s;content:counter(s);display:grid;place-items:center;width:40px;height:40px;border-radius:50%;border:2.5px solid var(--red);color:var(--red);font:700 22px var(--display);margin-bottom:16px}
.step p{color:var(--muted);margin-top:8px}
@media (max-width:820px){.steps{grid-template-columns:minmax(0,1fr)}}

/* Funktionen: Bild + Text abwechselnd */
.feature{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:44px;align-items:center;margin-bottom:64px}
.feature:nth-of-type(even) .sheet{order:2}
.feature p{color:var(--muted);margin-top:12px}
.feature ul{margin:16px 0 0;padding:0;list-style:none;display:flex;flex-wrap:wrap;gap:8px}
.feature li{font-size:14px;font-weight:600;padding:4px 11px;border-radius:999px;background:var(--sheet);border:1px solid var(--line)}
@media (max-width:820px){.feature{grid-template-columns:minmax(0,1fr);gap:22px}.feature:nth-of-type(even) .sheet{order:0}}

/* Kleine Kacheln */
.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.card{background:var(--sheet);border:1px solid var(--line);border-radius:10px;padding:22px}
.card svg{width:28px;height:28px;color:var(--red);margin-bottom:12px}
.card p{color:var(--muted);margin-top:6px;font-size:16px}
@media (max-width:820px){.grid{grid-template-columns:minmax(0,1fr)}}

/* Lehrer */
.teach{background:var(--navy);color:#fff;border-radius:14px;padding:clamp(28px,5vw,52px);display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:36px;align-items:center}
.teach h2{color:#fff}
.teach .lead{color:rgba(255,255,255,.82);margin-top:12px}
.teach ol{margin:0;padding:0;list-style:none;display:grid;gap:12px}
.teach li{background:rgba(255,255,255,.1);border-radius:8px;padding:12px 16px;font-weight:600}
.teach li small{display:block;font-weight:400;opacity:.8}
.badge{display:inline-block;font:700 13px var(--display);letter-spacing:.1em;text-transform:uppercase;background:var(--amber);color:#1f2a36;border-radius:4px;padding:3px 8px;margin-bottom:14px}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .teach{background:#17466b}}
:root[data-theme="dark"] .teach{background:#17466b}
@media (max-width:820px){.teach{grid-template-columns:minmax(0,1fr)}}

/* Installieren */
.install .card h3{display:flex;align-items:center;gap:10px}
.install ol{margin:12px 0 0;padding-left:20px;color:var(--muted);font-size:16px}
.install li{margin:4px 0}
.install kbd{font:600 14px var(--body);background:var(--page);border:1px solid var(--line);border-radius:4px;padding:1px 6px;color:var(--ink)}

/* Schluss + Fußzeile */
.final{text-align:center;padding:96px 0 84px}
.final .lead{margin:14px auto 28px}
footer{border-top:1px solid var(--line);padding:28px 0 calc(28px + env(safe-area-inset-bottom,0px));font-size:14px;color:var(--muted)}
footer .wrap{display:flex;gap:16px 28px;flex-wrap:wrap;align-items:center}
footer nav{position:static;background:none;backdrop-filter:none;border:0;display:flex;gap:18px;margin-left:auto}
footer a{color:var(--muted)}
.lead.first{margin-top:18px}