* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  background: #f4f4f4;
  color: #222;
}

/* Header */
.header {
  background: #ffffff;
  text-align: center;
  padding: 45px 20px;   /* etwas mehr Luft */
  border-bottom: 1px solid #ddd;
}

/* Firmenlogo – groß, ruhig, professionell */
.logo {
  max-width: 550px;     /* deutlich größer */
  width: 100%;
  height: auto;
  display: block;
  margin: 0 auto 25px auto;
}

/* Layout */
.container {
  max-width: 1000px;
  margin: 40px auto;
  padding: 0 15px;
}

/* Grid */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 30px;
}

/* Klick-Karten */
.nav-card {
  background: #ffffff;
  border-radius: 14px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  padding: 60px 20px;
  text-align: center;
  text-decoration: none;
  color: inherit;
  transition: transform 0.2s ease;
}

.nav-card:hover {
  transform: scale(1.05);
}

/* Footer */
footer {
  background: #ffffff;
  text-align: center;
  padding: 15px;
  border-top: 1px solid #ddd;
}