:root {
  --bg: #050816;
  --bg2: #0a1024;
  --panel: rgba(8, 13, 32, 0.78);
  --panel-strong: rgba(10, 16, 38, 0.92);
  --text: #f4f7ff;
  --muted: #bcc7e6;
  --line: rgba(255, 255, 255, 0.12);
  --accent: #35d6ff;
  --accent2: #8b5cff;
  --gold: #ffb347;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg2) 100%);
  min-height: 100vh;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 80px 80px;
  opacity: 0.12;
  pointer-events: none;
  z-index: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

.site-header,
main,
.site-footer,
.bg-slideshow {
  position: relative;
  z-index: 1;
}

.bg-slideshow {
  position: fixed;
  inset: 0;
  z-index: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  animation: bgslide 30s infinite;
  filter: brightness(0.55) saturate(1.05);
}

.bg-slideshow::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5, 8, 22, 0.35), rgba(5, 8, 22, 0.85));
}

@keyframes bgslide {
  0%   { background-image: url("bilder/planet-1.jpg"); }
  33%  { background-image: url("bilder/planet-2.jpg"); }
  66%  { background-image: url("bilder/planet-3.jpg"); }
  100% { background-image: url("bilder/planet-1.jpg"); }
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 20px 28px;
  background: rgba(4, 8, 20, 0.68);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.brand img {
  width: 160px;
  height: auto;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.nav a {
  color: var(--muted);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.nav a:hover {
  color: var(--accent);
}

.hero {
  min-height: 72vh;
  display: grid;
  align-items: center;
  padding: 72px 28px 80px;
}

.hero-copy {
  max-width: 980px;
  margin: 0 auto;
  text-align: center;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.78rem;
  font-weight: 700;
}

.hero h1 {
  margin: 0;
  font-size: clamp(3rem, 8vw, 6.5rem);
  line-height: 0.95;
  letter-spacing: 0.04em;
  text-shadow: 0 0 24px rgba(53, 214, 255, 0.25);
}

.lead {
  max-width: 760px;
  margin: 22px auto 0;
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
  line-height: 1.8;
  color: var(--muted);
}

.hero-actions {
  margin-top: 32px;
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn.primary {
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  color: #08101f;
  box-shadow: 0 10px 28px rgba(53, 214, 255, 0.28);
}

.btn.secondary {
  border-color: rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
}

.section {
  padding: 30px 28px 10px;
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  margin-bottom: 18px;
}

.section-title h2 {
  margin: 0;
  font-size: clamp(1.7rem, 4vw, 2.6rem);
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 24px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
}

.glow {
  position: relative;
  overflow: hidden;
}

.glow::after {
  content: "";
  position: absolute;
  inset: auto -20% -50% -20%;
  height: 140px;
  background: radial-gradient(circle, rgba(53, 214, 255, 0.22), transparent 65%);
  filter: blur(10px);
  pointer-events: none;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: -40px;
}

.feature-grid h2,
.card h3 {
  margin-top: 0;
}

.two-col {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.accent {
  background: linear-gradient(180deg, rgba(14, 22, 52, 0.96), rgba(18, 28, 64, 0.88));
  border-color: rgba(53, 214, 255, 0.22);
}

.list {
  margin: 0;
  padding-left: 20px;
  line-height: 1.8;
  color: var(--muted);
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.step span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  margin-bottom: 12px;
  font-weight: 700;
  color: #08101f;
  background: linear-gradient(90deg, var(--gold), #ffd86f);
}

.step p,
.card p {
  color: var(--muted);
  line-height: 1.7;
}

.photo-toggle {
  margin: 22px 0 12px;
  display: flex;
  justify-content: center;
}

.photo-toggle button {
  padding: 12px 20px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  color: #08101f;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 10px 28px rgba(53, 214, 255, 0.22);
}

.photo-toggle button:hover {
  transform: translateY(-2px);
}

.photo-grid {
  display: none;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.photo-grid.show {
  display: grid;
}

.photo-grid img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
}

.site-footer {
  max-width: 1200px;
  margin: 30px auto 0;
  padding: 24px 28px 40px;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.site-footer a:hover {
  color: var(--accent);
}

@media (max-width: 980px) {
  .feature-grid,
  .steps,
  .two-col {
    grid-template-columns: 1fr;
  }

  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav {
    gap: 12px;
  }

  .hero {
    min-height: auto;
    padding: 56px 20px 64px;
  }
}

@media (max-width: 560px) {
  .section,
  .topbar,
  .site-footer {
    padding-left: 16px;
    padding-right: 16px;
  }

  .card {
    padding: 18px;
    border-radius: 14px;
  }

  .hero h1 {
    font-size: 3rem;
  }

  .photo-grid img {
    height: auto;
  }
}