:root {
  --brand: #0b5fff;
  --brand-2: #7c3aed;
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #666;
  --border: #e5e5e5;
  --surface: #ffffff;
  --surface-glass: rgba(255, 255, 255, 0.6);
  --shadow: 0 8px 24px rgba(20, 20, 40, 0.08);
  --shadow-hover: 0 14px 32px rgba(20, 20, 40, 0.14);
  --gradient-hero: linear-gradient(120deg, #eef4ff, #f7f0ff, #eef9ff);
  --gradient-brand: linear-gradient(135deg, var(--brand), var(--brand-2));
  --radius: 12px;
  --transition: 0.25s ease;
}

[data-theme="dark"] {
  --bg: #0f1117;
  --fg: #f1f2f6;
  --muted: #a0a4b8;
  --border: #2a2d3a;
  --surface: #171923;
  --surface-glass: rgba(23, 25, 35, 0.6);
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 14px 32px rgba(0, 0, 0, 0.45);
  --gradient-hero: linear-gradient(120deg, #141726, #1c1830, #10202b);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.5;
  transition: background-color 0.3s ease, color 0.3s ease;
}

body.lang-de .lang-en { display: none !important; }
body.lang-en .lang-de { display: none !important; }

.hero {
  position: relative;
  text-align: center;
  padding: 3rem 1rem 4rem;
  overflow: hidden;
  isolation: isolate;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--gradient-hero);
  background-size: 200% 200%;
  animation: gradientShift 16s ease infinite;
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.hero-banner {
  max-width: 100%;
  width: 480px;
  height: auto;
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.hero h1 {
  margin: 0.75rem 0 0;
  font-size: 2.25rem;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero .version { color: var(--muted); margin: 0.25rem 0 1.5rem; }

.hero-card {
  max-width: 640px;
  margin: 0 auto;
  padding: 1.5rem;
  border-radius: var(--radius);
  background: var(--surface-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.hero .tagline { margin: 0 0 1.25rem; }

.site-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: center;
  background: transparent;
  transition: background-color var(--transition), box-shadow var(--transition), backdrop-filter var(--transition);
}
.site-nav.scrolled {
  background: var(--surface-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
}
.nav-inner {
  display: flex;
  gap: 1.5rem;
  padding: 0.75rem 1rem;
  flex-wrap: wrap;
  justify-content: center;
}
.nav-inner a {
  color: var(--fg);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  opacity: 0.8;
  transition: opacity var(--transition);
}
.nav-inner a:hover { opacity: 1; }

.cta { display: flex; gap: 0.75rem; justify-content: center; flex-wrap: wrap; }

.button {
  display: inline-block;
  padding: 0.6rem 1.2rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  border: 1px solid var(--border);
  cursor: pointer;
  font-size: 1rem;
  transition: transform var(--transition), box-shadow var(--transition);
}
.button:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.button:focus-visible { outline: 3px solid var(--brand-2); outline-offset: 2px; }
.button.primary { background: var(--gradient-brand); color: #fff; border-color: transparent; }
.button.secondary { background: var(--surface); color: var(--fg); }
.button.outline { background: transparent; color: var(--brand); border-color: var(--brand); }
.icon-btn { padding: 0.6rem 0.8rem; }

main { max-width: 900px; margin: 0 auto; padding: 0 1rem 2rem; }

section { margin: 3rem 0; }
section h2 { border-bottom: 2px solid var(--border); padding-bottom: 0.4rem; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

.features ul {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 0.75rem;
}
.features li {
  position: relative;
  margin: 0;
  padding: 0.9rem 1rem 0.9rem 2.2rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}
.features li:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.features li::before {
  content: "✓";
  position: absolute;
  left: 0.9rem;
  color: var(--brand);
  font-weight: 700;
}
.downloads ul { padding-left: 1.2rem; }

.carousel { position: relative; display: flex; align-items: center; gap: 0.5rem; }
.carousel-track {
  display: flex;
  gap: 0.75rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  padding: 0.25rem;
  flex: 1;
}
.carousel-track img.shot {
  flex: 0 0 auto;
  width: 220px;
  aspect-ratio: 3 / 5;
  object-fit: cover;
  scroll-snap-align: start;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}
.carousel-track img.shot:hover { transform: scale(1.04); box-shadow: var(--shadow-hover); }
.carousel-btn {
  flex: 0 0 auto;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface-glass);
  backdrop-filter: blur(8px);
  cursor: pointer;
  font-size: 1rem;
  transition: transform var(--transition), box-shadow var(--transition);
}
.carousel-btn:hover { transform: scale(1.08); box-shadow: var(--shadow); }

.whatsnew h3 { margin-bottom: 0.2rem; }
.whatsnew .release-date { color: var(--muted); font-weight: normal; font-size: 0.9em; }
.whatsnew .notice {
  background: var(--surface-glass);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
}
.whatsnew > .lang-de, .whatsnew > .lang-en {
  border-left: 3px solid transparent;
  border-image: var(--gradient-brand) 1;
  padding-left: 1rem;
}
.history summary { cursor: pointer; color: var(--brand); margin: 1rem 0; font-weight: 600; }

footer {
  text-align: center;
  padding: 2.5rem 1rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
}
.footer-links {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}
.footer-links .button { font-size: 1.05rem; padding: 0.75rem 1.4rem; }
.footer-legal { margin-top: 1.2rem; font-size: 0.85rem; }
.footer-legal a { color: var(--muted); }

@media (prefers-reduced-motion: reduce) {
  .hero-bg, .hero-banner { animation: none !important; }
  .reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
  * { scroll-behavior: auto !important; }
}

@media (max-width: 480px) {
  .hero-banner { width: 320px; }
  .hero h1 { font-size: 1.75rem; }
  .nav-inner { gap: 1rem; }
  .carousel-track img.shot { width: 160px; }
}