/*
 * Copyright (c) 2026 Martin Bundschuh, SeeBubble Media FlexCo. All rights reserved.
 * Written by Martin Bundschuh.
 *
 * Schlanke Gestaltung für die Produktseiten p2p.html, letterra.html und die Fehlerseite 404.html.
 */
:root {
  --bg: #050308;
  --bg2: #0d0a18;
  --text: #ffffff;
  --text2: rgba(255, 255, 255, 0.72);
  --rand: rgba(255, 255, 255, 0.09);
  --akzent: #00f2fe;
  --akzent2: #4facfe;
  --grad: linear-gradient(135deg, var(--akzent) 0%, var(--akzent2) 100%);
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: radial-gradient(1200px 600px at 10% -10%, rgba(79, 172, 254, 0.14), transparent 60%),
              radial-gradient(900px 500px at 100% 20%, rgba(161, 140, 209, 0.12), transparent 60%), var(--bg);
  color: var(--text);
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
}
a { color: var(--akzent); }
img { max-width: 100%; height: auto; }
.navbar {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  max-width: 1100px; margin: 0 auto; padding: 1rem 16px;
}
.nav-brand { display: inline-flex; align-items: center; gap: .6rem; color: var(--text); text-decoration: none; font-weight: 700; }
.nav-links { display: flex; align-items: center; gap: .6rem; flex-wrap: wrap; }
.nav-links a, .lang-toggle {
  color: var(--text); text-decoration: none; font-size: .9rem; height: 34px; padding: 0 .9rem;
  display: inline-flex; align-items: center; border: 1px solid var(--rand); border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
}
main { max-width: 1100px; margin: 0 auto; padding: 1rem 16px 3rem; }
.krumen { font-size: .85rem; color: var(--text2); margin: .5rem 0 1.5rem; }
.krumen a { color: var(--text2); }
.hero { display: grid; grid-template-columns: 160px 1fr; gap: 2rem; align-items: center; margin-bottom: 2.5rem; }
.hero img { width: 160px; height: 160px; border-radius: 36px; box-shadow: 0 20px 45px rgba(0, 0, 0, 0.45); }
.marke { color: var(--akzent); font-weight: 700; text-transform: uppercase; letter-spacing: .08em; font-size: .8rem; }
h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); line-height: 1.15; margin: .3rem 0 .8rem; }
h2 { font-size: 1.5rem; margin: 2.5rem 0 1rem; }
.lead { color: var(--text2); font-size: 1.1rem; margin: 0; }
.karte { background: rgba(255, 255, 255, 0.035); border: 1px solid var(--rand); border-radius: 20px; padding: 1.5rem; }
.karte p { color: var(--text2); margin: 0 0 1rem; }
.karte p:last-child { margin-bottom: 0; }
.merkmale { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1rem; }
.merkmale li { background: rgba(255, 255, 255, 0.035); border: 1px solid var(--rand); border-radius: 16px; padding: 1rem 1.2rem; color: var(--text2); }
.status { display: inline-block; margin-top: 1rem; padding: .5rem 1rem; border-radius: 999px; border: 1px solid rgba(0, 242, 254, 0.35); color: var(--akzent); font-weight: 600; font-size: .9rem; }
.galerie { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1rem; }
.galerie figure { margin: 0; background: rgba(255, 255, 255, 0.035); border: 1px solid var(--rand); border-radius: 16px; overflow: hidden; }
.galerie img { display: block; width: 100%; height: auto; }
.galerie figcaption { padding: .7rem 1rem; color: var(--text2); font-size: .9rem; }
.download-titel { margin: 1.5rem 0 .6rem; font-weight: 700; color: var(--akzent); }
.knoepfe { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: .7rem; }
.knopf {
  display: inline-flex; align-items: center; justify-content: center; text-align: center; gap: .4rem;
  padding: .75rem 1rem; border-radius: 14px; background: var(--grad); color: #04121a; font-weight: 700; text-decoration: none;
}
.knopf.leise { background: rgba(255, 255, 255, 0.06); color: var(--text); border: 1px solid var(--rand); }
.faq details { background: rgba(255, 255, 255, 0.035); border: 1px solid var(--rand); border-radius: 14px; padding: .9rem 1.2rem; margin-bottom: .7rem; }
.faq summary { cursor: pointer; font-weight: 700; }
.faq summary h3 { display: inline; font-size: 1rem; margin: 0; }
.faq details p { color: var(--text2); margin: .7rem 0 0; }
footer { border-top: 1px solid var(--rand); padding: 2rem 16px; text-align: center; color: var(--text2); font-size: .85rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: .4rem 1.2rem; justify-content: center; margin-bottom: 1rem; }
.footer-links a { color: var(--text2); text-decoration: none; }
.fehler { text-align: center; padding: 4rem 0; }
.fehler .code { font-size: clamp(4rem, 14vw, 8rem); font-weight: 800; line-height: 1; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
select.lang-toggle option { color: #111; background: #fff; }
@media (max-width: 640px) {
  .hero { grid-template-columns: 1fr; text-align: center; }
  .hero img { margin: 0 auto; width: 120px; height: 120px; border-radius: 28px; }
  .navbar { flex-wrap: wrap; }
}