@font-face{font-family:"JetBrains Mono";font-weight:500;font-display:swap;src:url(jetbrains-mono-latin-500-normal.woff2) format("woff2")}
@font-face{font-family:"JetBrains Mono";font-weight:800;font-display:swap;src:url(jetbrains-mono-latin-800-normal.woff2) format("woff2")}
:root{--bg:#071a20;--fg:#fff;--mut:#c2d4da;--acc:#0dcdf7;--line:rgba(13,205,247,.4);box-sizing:border-box}
*,*::before,*::after{box-sizing:inherit}
html{scroll-padding-top:env(safe-area-inset-top,0px)}
body{margin:0;background:var(--bg);color:var(--fg);font:18px/1.6 system-ui,-apple-system,"Segoe UI",sans-serif}
a{color:var(--acc)}
a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid var(--acc);outline-offset:2px}
h1,h2{font-family:"JetBrains Mono",ui-monospace,Menlo,monospace;font-weight:800;letter-spacing:-.02em}

/* Landing: Vanta laeuft auf #page, damit die Ringe auch hinter dem Text weiter unten liegen */
#page{position:relative;overflow:hidden;background:radial-gradient(circle at 70% 20%,#0b3a46 0,var(--bg) 60%)}
/* #bg sitzt im Hero und ragt oben/unten um --ext ueber ihn hinaus: Mittelpunkt der Animation = Mittelpunkt des Hero-Fensters.
   Unten blendet die Animation weich aus, dort liegt sie hinter dem Text. */
:root{--ext:250px}
#bg{position:absolute;top:calc(var(--ext) * -1);bottom:calc(var(--ext) * -1);left:0;right:0;z-index:0;pointer-events:none;
  -webkit-mask-image:linear-gradient(to bottom,#000 calc(100% - var(--ext)),transparent);
  mask-image:linear-gradient(to bottom,#000 calc(100% - var(--ext)),transparent)}
#bg .vanta-canvas{opacity:.45;animation:ringhue 16s ease-in-out infinite}
/* Cyan (Hue ca. 191 Grad) -> Rot (ca. 361 Grad) und zurueck */
@keyframes ringhue{0%,100%{filter:hue-rotate(0deg)}50%{filter:hue-rotate(170deg)}}
@media (prefers-reduced-motion:reduce){#bg .vanta-canvas{animation:none}}
#hero,section,footer{position:relative;z-index:1}
#hero{min-height:100svh;display:flex;align-items:center;justify-content:center;
  padding:calc(32px + env(safe-area-inset-top,0px)) 20px calc(32px + env(safe-area-inset-bottom,0px))}
.panel{position:relative;z-index:2;width:100%;max-width:640px;padding:clamp(22px,4vw,40px);
  background:rgba(5,18,23,.86);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line);border-radius:16px}
h1{font-size:clamp(1.9rem,5.5vw,3rem);line-height:1.1;margin:0 0 18px}
.lead{color:var(--mut);margin:0 0 26px}
.row{display:flex;gap:10px;flex-wrap:wrap}
input[type=email]{flex:1 1 220px;padding:14px;font-size:1rem;border:1px solid var(--line);border-radius:10px;background:rgba(255,255,255,.08);color:var(--fg)}
input::placeholder{color:#8fa6ad}
button{padding:14px 22px;font:500 1rem "JetBrains Mono",ui-monospace,monospace;border:0;border-radius:10px;background:var(--acc);color:#04222b;cursor:pointer}
button:disabled{opacity:.6;cursor:wait}
.chk{display:flex;gap:10px;align-items:flex-start;margin-top:14px;font-size:.85rem;color:var(--mut)}
.chk input{margin-top:4px}
#m{min-height:1.5em;margin:12px 0 0;font-size:.95rem}
.hint{font-size:.85rem;color:var(--mut);margin:12px 0 0}

section,.doc{max-width:720px;margin:0 auto;padding:64px 24px}
h2{font-size:1.5rem;line-height:1.25;margin:0 0 20px}
.learn{list-style:none;padding:0;margin:0}
.learn li{padding:14px 16px 14px 18px;border-left:3px solid var(--acc);margin-bottom:14px;background:rgba(5,18,23,.7);border-radius:0 10px 10px 0}
.learn strong{display:block}
.learn span{color:var(--mut)}
footer{max-width:720px;margin:0 auto;padding:24px 24px calc(40px + env(safe-area-inset-bottom,0px));color:var(--mut);font-size:.9rem;text-shadow:0 0 8px #071a20}

/* Rechtstexte */
.doc{padding-top:calc(40px + env(safe-area-inset-top,0px))}
.doc h1{font-size:2rem}
.doc h2{font-size:1.2rem;margin-top:36px}
.doc p,.doc li{color:var(--mut)}
.doc p strong{color:var(--fg)}

/* Mobile */
html{-webkit-text-size-adjust:100%}
@media (max-width:600px){
  :root{--ext:150px}
  body{font-size:17px}
  #hero{padding-left:14px;padding-right:14px}
  .panel{padding:22px 18px;border-radius:14px}
  .row{flex-direction:column}
  input[type=email],button{width:100%;min-height:48px;flex:none}
  .chk{font-size:.9rem}
  .chk input{width:22px;height:22px;flex:none;margin-top:2px}
  .hint{font-size:.9rem}
  section{padding:40px 18px}
  .doc{padding-left:18px;padding-right:18px}
}