Quiz

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<html>
  <head>
    <title>Quiz</title>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
    <style>

      body {
        margin: 0;
        font-family: Arial, sans-serif;
      }

      h1 {
        width: 100%;
        font-size: 3em;
        background-color: #fec055;
        margin: 0;
        text-align: center;
        padding: 0.25em 0;
        -webkit-user-select: none;
        -moz-user-select: none;
        -ms-user-select: none;
        user-select: none;
      }

      form {
        margin: 1em;
        font-size: 1.5em;
      }

      input,
      label {
        cursor: pointer;
      }

      input[type="text"] {
        font-size: 1.2em;
        cursor: text;
      }

      .submit {
        height: 2.5em;
        width: 8em;
        font-size: 2em;
        background-color: #fec055;
        border: 0;
        margin-top: 0.5em;
        text-align: center;
        position: absolute;
        left: 50%;
        margin-left: -4em;
        line-height: 2.5em;
        -webkit-user-select: none;
        -moz-user-select: none;
        -ms-user-select: none;
        user-select: none;
      }

      @media (max-width: 400px) {

        .submit {
          width: 100%;
          margin-left: 0;
          left: 0;
        }

        input[type="text"] {
          width: 100%;
        }

      }

    </style>
  </head>
  <body>
    <h1>Quiz</h1>
    <form action="quiz.php">
      <input type="text" name="name" placeholder="Dein Name" required>
      <div>
        <p>Was ist 1 + 1?</p>
        <input type="radio" id="r1" name="plus" value="2" required><label for="r1">2</label>
        <input type="radio" id="r2" name="plus" value="sqrt5"><label for="r2">√5</label>
        <input type="radio" id="r3" name="plus" value="nr"><label for="r3">Nicht rechenbar</label>
      </div>
      <div>
        <p>Für was steht CSS?</p>
        <input type="radio" id="r4" name="css" value="style" required><label for="r4">Cascading Style Sheets</label>
        <input type="radio" id="r5" name="css" value="super"><label for="r5">Context Super Sytle</label>
        <input type="radio" id="r6" name="css" value="something"><label for="r6">Christopher Says Something</label>
      </div>
      <div class="submit">Auswerten !!!</div>
    </form>
    <script>
      var submit = document.querySelector(".submit");
      var form = document.querySelector("form");

      submit.addEventListener("click", function(){
        form.submit()
      });
    </script>
  </body>
</html>