* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: #0b4778;
  background: #fff;
  font-family: sans-serif;
  line-height: 1.6;
}

.seite {
  width: 100%;
  max-width: 1200px;
  min-height: 100vh;
  margin: 0 auto;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.08);
}

.banner {
  padding: 55px 20px;
  text-align: center;
  color:#0b4778;
}

.banner h1 {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 3rem);
  line-height: 1.2;
}
.banner h2 {
  margin: 10px 0 0;
  color:#0b4778;
  font-size: clamp(1.4rem, 4vw, 2.6rem);
}

.banner p {
  margin: 10px 0 0;
  font-size: clamp(1.4rem, 2vw, 1.6rem);
}

.bild {
  display: block;
  width: 100%;
  height: auto;
}

nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: #0b4778;
}

nav ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  margin: 0;
  padding: 0;
  list-style: none;
}

nav a {
  display: block;
  padding: 15px 20px;
  color: #fff;
  font-weight: bold;
  text-decoration: none;
}

nav a:hover,
nav a:focus {
  background: #083555;
}

section {
  padding: 70px 7%;
  border-bottom: 1px solid #ddd;
  scroll-margin-top: 60px;
}

section:nth-child(even) {
  background: #f7f9fb;
}

h2 {
  margin-top: 0;
  color: #0b4778;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  line-height: 1.25;
}

h3 {
  line-height: 1.3;
}

.karten {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin-top: 25px;
}

.karte {
  padding: 22px;
  background: #fff;
  border: 1px solid #d9e1e8;
  border-radius: 8px;
}

.karte h3 {
  margin-top: 0;
  color: #0b4778;
}
.karte img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
  border-radius: 8px;
}

.kontakt-box {
  padding: 22px;
  background: #eaf3fb;
  border-left: 5px solid #0b4778;
}

a {
  color: #0b4778;
}

footer {
  padding: 25px 20px;
  color:#fff;
  font-size: 0.9rem;
  text-align: center;
  background: #0b4778;
}

footer a {
  color: #fff;
}
footer p {
  color: #fff;
}

/* Tablet und kleinere Bildschirme */
@media (max-width: 800px) {
  .karten {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* Smartphones */
@media (max-width: 600px) {
  .banner {
    padding: 38px 16px;
  }

  nav ul {
    display: block;
    text-align: center;
  }

  nav a {
    padding: 12px 10px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  }

  section {
    padding: 45px 20px;
    scroll-margin-top: 0;
  }

  .karten {
    grid-template-columns: 1fr;
  }

  .kontakt-box {
    padding: 18px;
  }
}