body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #1e1e1e;
  color: #f0f0f0;
}
main {
  max-width: 900px;
  margin: auto;
  padding: 2rem;
}
h1, h2, h3, h4 {
  color: #ffffff;
}
nav {
  background-color: #111;
  padding: 1rem;
  text-align: center;
}
nav a {
  color: #f0f0f0;
  margin: 0 1rem;
  text-decoration: none;
  font-weight: bold;
}
nav a:hover {
  color: #1abc9c;
}
section {
  margin-bottom: 3rem;
}
a {
  color: #1abc9c;
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

.meta {
  font-style: italic;
  color: #aaa;
  margin-bottom: 2rem;
}

.nav-container {
  background-color: #111;
  padding: 1rem;
  text-align: center;
}

.nav-content {
  max-width: 900px;
  margin: 0 auto;
}

/* Desktop */
.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}

.nav-links a {
  color: #f0f0f0;
  margin: 0 0.75rem;
  text-decoration: none;
  font-weight: bold;
}

.nav-links a:hover {
  color: #1abc9c;
}

/* Mobile */
.nav-mobile-header {
  display: none;
  justify-content: space-between;
  align-items: center;
}

.nav-start-mobile {
  font-weight: bold;
  font-size: 1.1rem;
  color: #f0f0f0;
  text-decoration: none;
}

.nav-start-mobile:hover {
  color: #1abc9c;
}

.burger {
  display: none;
  font-size: 1.8rem;
  color: #f0f0f0;
  cursor: pointer;
}

.mobile-menu {
  display: none;
  flex-direction: column;
  background-color: #222;
  padding: 1rem;
  margin-top: 1rem;
  border-radius: 6px;
}

.mobile-menu a {
  margin: 0.5rem 0;
}

.mobile-menu.visible {
  display: flex;
}

.nav-links a.active,
.mobile-menu a.active,
.nav-start-mobile.active {
  color: #1abc9c;
  text-decoration: underline;
}

/* Sichtbarkeitsumschaltung */
@media (max-width: 768px) {

  .nav-links {
    display: none;
  }

  .nav-mobile-header {
    display: flex;
  }
  .burger {
    display: block;
  }
}