.content {
    margin-top: 54px;
  }
.header {
    padding: 15px;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 9999;
  }
.left-title {
    width: 80px;
    color: #fff;
    font-size: 18px;
    float: left;
  }
.right-title {
    width: 150px;
    text-align: right;
    float: right;
    color: #fff;
  }
.quiz-body {
    margin-top: 15px;
    padding-bottom: 50px;
  }
.option-block-container {
    margin-top: 20px;
    max-width: 420px;
  }
.option-block {
    padding: 10px;
    background: aliceblue;
    border: 1px solid #84c5fe;
    margin-bottom: 10px;
    cursor: pointer;
  }
.result-question {
    font-weight: bold;
  }
.c-wrong {
    margin-left: 20px;
    color: #ff0000;
  }
.c-correct {
    margin-left: 20px;
    color: green;
  }
.last-row {
    border-bottom: 1px solid #ccc;
    padding-bottom: 25px;
    margin-bottom: 25px;
  }
.res-header {
    border-bottom: 1px solid #ccc;
    margin-bottom: 15px;
    padding-bottom: 15px;
  }
.modal {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.4);
  }
  
.modal-content {
    background-color: #fefefe;
    margin: 15% auto;
    padding: 20px;
    border: 1px solid #888;
    width: 50%;
  }
  
.close {
    color: #aaaaaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
  }
  
.close:hover,
.close:focus {
    color: #000;
    text-decoration: none;
    cursor: pointer;
  }
  
  /* Add styles to quiz container to center it */
.login-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-top: 50px;
  }
  
header {
    text-align: center;
  }
  
h1 {
    font-size: 3rem;
  }
  
h2 {
    font-size: 2rem;
    margin-bottom: 20px;
  }
  
ol {
    list-style-type: none;
    padding: 0;
    margin: 0;
  }
  
li {
    margin-bottom: 20px;
  }
  
button {
    margin-top: 20px;
    padding: 10px 20px;
    font-size: 1.2rem;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
  }
  
button:hover {
    background-color: #3e8e41;
  }