:root {
  --home: #7bbd73;
  --intro: #94bd8c;
  --haupt: #aeaeae;
  --abspann: #d6ce9c;
  --eula: #f7de20;
  --text: #e6e6e6;
  --muted: #a3a3a3;
  --panel: rgba(20, 20, 20, .78);
  --line: rgba(255, 255, 255, .1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 64px; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  color: var(--text);
  background: #111 url(bilder/carbon_back.png);
}

a { color: var(--home); }

.c-home    { --c: var(--home); }
.c-intro   { --c: var(--intro); }
.c-haupt   { --c: var(--haupt); }
.c-abspann { --c: var(--abspann); }
.c-eula    { --c: var(--eula); }

.wrap {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Kopfbereich */
.header {
  background: #000;
  text-align: center;
  line-height: 0;
}

.header img {
  width: 100%;
  max-width: 1000px;
  height: auto;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 4px;
  padding: 10px 12px;
  background: rgba(0, 0, 0, .88);
  border-bottom: 1px solid var(--line);
}

.nav a {
  padding: 6px 14px;
  border-radius: 6px;
  color: var(--text);
  text-decoration: none;
  font-size: .9rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.nav a:hover {
  color: #000;
  background: var(--c);
}

/* Abschnitte */
.section {
  margin: 28px 0;
  padding: 28px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 3px solid var(--c);
  border-radius: 12px;
}

.section p { margin: 0 0 12px; }
.section p:last-child { margin-bottom: 0; }

h2 {
  margin: 0 0 14px;
  color: var(--c);
  font-size: 1.7rem;
  font-style: italic;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.kapitel {
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
}

/* Filmabschnitte: Text links, Video rechts */
.film {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 28px;
  align-items: center;
}

.achtung strong { color: #ff5a4f; }

.video {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: 8px;
  background: #000;
}

.video img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: blur(1px) brightness(.7);
  transform: scale(1.03);
}

.video button {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  width: 100%;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.play {
  width: 68px;
  height: 68px;
  border-radius: 50%;
  background: var(--c);
  box-shadow: 0 4px 20px rgba(0, 0, 0, .5);
  transition: transform .15s;
  position: relative;
}

.play::after {
  content: "";
  position: absolute;
  left: 27px;
  top: 21px;
  border-style: solid;
  border-width: 13px 0 13px 21px;
  border-color: transparent transparent transparent #000;
}

.video button:hover .play,
.video button:focus-visible .play { transform: scale(1.1); }

.video iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

.yt-hinweis {
  width: fit-content;
  max-width: 100%;
  margin: -12px auto 0;
  padding: 4px 14px;
  border-radius: 999px;
  background: rgba(0, 0, 0, .8);
  color: var(--muted);
  font-size: .85rem;
  text-align: center;
}

.marke { color: #ffa500; font-style: italic; }

/* Fußbereich */
.footer {
  margin-top: 40px;
  padding: 32px 0;
  background: rgba(0, 0, 0, .85);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .9rem;
  text-align: center;
}

.logos {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 32px;
  margin-bottom: 16px;
}

.logos img { height: auto; }
.logos img:first-child { width: 110px; }
.logos img:last-child { width: 150px; }

.footer p { margin: 0; }

@media (max-width: 720px) {
  body { font-size: 16px; }
  .section { padding: 20px; }
  .film { grid-template-columns: 1fr; gap: 18px; }
  h2 { font-size: 1.4rem; }
}