body, html {
  margin: 0;
  padding: 0;
  font-family: "Segoe UI", sans-serif;
  background: #eef3f9;
}

.background {
  background-image: url('bluewater.jpg');
  background-size: cover;
  background-position: center;
  min-height: 100vh;
  padding: 40px;
  backdrop-filter: blur(2px);
}

.container {
  max-width: 900px;
  margin: auto;
  background: rgba(255, 255, 255, 0.5);  /* <— geändert */
  padding: 30px;
  border-radius: 20px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

h1 {
  text-align: center;
  margin-bottom: 20px;
  color: #003366;
}

.image-wrapper {
  text-align: center;
  margin-bottom: 30px;
}

.image-wrapper img {
  max-width: 200px;
  border-radius: 12px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.3);
}

/* Layout: Zeilen mit Karten nebeneinander */
.row {
  display: flex;
  gap: 20px;
  justify-content: space-between;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.card {
  flex: 1;
  min-width: 200px;
  background: #ffffff;
  padding: 15px;
  border-radius: 15px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  text-align: center;
  color: #003366;
}

input[type=range] {
  width: 100%;
  margin: 10px 0;
}

button {
  margin: 5px;
  padding: 8px 16px;
  font-size: 14px;
  border: none;
  border-radius: 8px;
  background:#003366;
  color: white;
  cursor: pointer;
}

button:hover {
  background: #003366;
}
input[type="number"] {
  width: 100%;
  padding: 6px;
  font-size: 16px;
  border-radius: 8px;
  border: 1px solid #ccc;
  box-sizing: border-box;
}
#lampToggle {
  padding: 10px 24px;
  font-size: 16px;
  border: none;
  border-radius: 10px;
  background-color: #999;
  color: white;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

#lampToggle.on {
  background-color: #00b300;
}

@media (max-width: 600px) {
  .container {
    padding: 20px;
  }

  h1 {
    font-size: 1.5rem;
  }

  .row {
    flex-direction: column;
    gap: 15px;
  }

  .card {
    min-width: auto;
    width: 100%;
  }

  .image-wrapper img {
    max-width: 100%;
    height: auto;
  }

  input[type="number"] {
    font-size: 14px;
  }

  button, #lampToggle {
    width: 100%;
    font-size: 16px;
    padding: 10px;
  }
}
.card {
  flex: 1;
  min-width: 200px;
  background: #ffffff;
  padding: 15px;
  border-radius: 15px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  text-align: center;
  color: #003366;
  margin-bottom: 20px;  /* ✅ THIS ADDS SPACING */
}