body {
  font-family: Arial, Helvetica, sans-serif;
  background-color: #f8f9fa; /* Màu nền trang */
  height: 100vh;
  margin: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
  
  .head {
    background-color:#020514;
    color: white;
    padding: 20px;
    text-align: left;
  }
  
  .head h1 {
    margin: 0;
    font-size: 24px;
  }
  
  .weekly-streak {
    background-color: white;
    margin: 20px;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  }
  
  .weekly-streak h2 {
    font-size: 20px;
  }
  
  .courses {
    margin: 20px;
  }
  
  .course-item {
    background-color: white;
    display: flex;
    align-items: center;
    margin-bottom: 15px;
    padding: 10px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  }
  
  .course-item img {
    width: 50px;
    height: 50px;
    margin-right: 15px;
  }
  
  .certifications {
    margin: 20px;
  }
  
  .certification-item {
    background-color: white;
    display: inline-block;
    width: 22%;
    margin-right: 2%;
    margin-bottom: 20px;
    padding: 10px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  }
  
  .certification-item img {
    width: 100%;
    border-radius: 8px;
  }
  
  .personalize {
    background-color: #f4f4f4;
    padding: 20px;
    text-align: center;
    margin: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  }
  
  .button {
    padding: 10px 20px;
    background-color: #333;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
  }
  
  .button:hover {
    background-color: #555;
  }
  .navbar {
    background-color: #f8f8f8;
    overflow: hidden;
    border-bottom: 1px solid #e7e7e7;
    margin-top:10px ;
  }
  
  .navbar ul {
    list-style-type: none;
    margin: 0;
    
  }
  
  .navbar ul li {
    float: left;
  }
  
  .navbar ul li a {
    display: block;
    color: #333;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
  }
  
  .navbar ul li a:hover {
    background-color: #ddd;
    color: black;
  }
  
  .dropdown {
    position: relative;
  }
  
  .dropdown-content {
    display: none;
    position: absolute;
    background-color: white;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    z-index: 1;
    min-width: 160px;
  }
  
  .dropdown-content a {
    color: black;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    text-align: left;
  }
  
  .dropdown-content a:hover {
    background-color: #ddd;
  }
  
  .dropdown:hover .dropdown-content {
    display: block;
  }
  
  /* Rest of the styles */