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

  body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #eef2f3, #8e9eab);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    color: #333;
    text-align: center; /* Zentriert alles im Body */
  }

  .container {
    background-color: #fff;
    padding: 2rem;
    max-width: 600px;
    width: 100%;
    border-radius: 1rem;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
    transition: box-shadow 0.3s ease;
  }

  .container:hover {
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
  }

  .containerAdmin {
    background-color: #fff;
    padding: 2rem;
    max-width: 600px;
    width: 100%;
    border-radius: 1rem;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
    transition: box-shadow 0.3s ease;
  }

  .containerAdmin:hover {
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
  }

  h1 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: #2c3e50;
  }

  .logo {
    display: block;
    margin: 0 auto 20px;
    max-width: 150px;
    height: auto;
    transition: max-width 0.3s ease;
  }

  label {
    font-weight: 600;
    margin-top: 1rem;
    display: block;
    text-align: left; /* Links ausgerichtet im Formular */
  }

  select,
  input[type="number"],
  button {
    width: 100%;
    padding: 0.75rem;
    margin-top: 0.5rem;
    margin-bottom: 1rem;
    border: 1px solid #ccc;
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: border 0.2s ease, box-shadow 0.2s ease;
    display: block;
  }

  select,
  input[type="numberAdmin"],
  button {
    width: 100%;
    padding: 0.75rem;
    margin-top: 0.5rem;
    margin-bottom: 1rem;
    border: 1px solid #ccc;
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: border 0.2s ease, box-shadow 0.2s ease;
    display: block;
  }

  input[type="number"] {
    text-align: center;
  }

  input[type="numberAdmin"] {
    text-align: center;
    width:60px;
  }

  select:focus,
  input[type="number"]:focus {
    border-color: #007bff;
    outline: none;
    box-shadow: 0 0 0 3px rgba(0,123,255,0.1);
  }

  select:focus,
  input[type="numberAdmin"]:focus {
    border-color: #007bff;
    outline: none;
    box-shadow: 0 0 0 3px rgba(0,123,255,0.1);
  }

  select,
  input[type="text"],
  button {
    width: 100%;
    padding: 0.75rem;
    margin-top: 0.5rem;
    margin-bottom: 1rem;
    border: 1px solid #ccc;
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: border 0.2s ease, box-shadow 0.2s ease;
    display: block;
  }

  input[type="text"] {
    text-align: center;
  }

  select:focus,
  input[type="text"]:focus {
    border-color: #007bff;
    outline: none;
    box-shadow: 0 0 0 3px rgba(0,123,255,0.1);
  }

  select,
  input[type="password"],
  button {
    width: 100%;
    padding: 0.75rem;
    margin-top: 0.5rem;
    margin-bottom: 1rem;
    border: 1px solid #ccc;
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: border 0.2s ease, box-shadow 0.2s ease;
    display: block;
  }

  input[type="password"] {
    text-align: center;
  }

  select:focus,
  input[type="password"]:focus {
    border-color: #007bff;
    outline: none;
    box-shadow: 0 0 0 3px rgba(0,123,255,0.1);
  }

  button {
    background-color: #007bff;
    color: white;
    border: none;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.2s ease;
  }

  button:hover {
    background-color: #0056b3;
  }

  .checkbox-group {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin-top: 0.5rem;
  }

  .checkbox-group label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-weight: normal;
    font-size: 0.95rem;
  }

  .disabled {
    pointer-events: none;
    opacity: 0.6;
    filter: grayscale(80%);
  }

  #feedback {
    text-align: center;
    color: green;
    font-weight: bold;
    margin-top: 1rem;
    transition: opacity 0.5s ease;
  }

  @media (max-width: 480px) {
    .logo {
      max-width: 100px;
    }

    .checkbox-group {
      flex-direction: column;
      gap: 0.5rem;
    }

    .containerAdmin {
      padding: 1.0rem;
      border-radius: 0.75rem;
    }

    h1 {
      font-size: 1.4rem;
    }
  }