body {
    background-image: url(img/gym1.jpg);
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
    margin: 0;
    padding: 0;
    height: 100vh; /* Ensure the body takes up the full viewport height */
}

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

  /* Style for header */
  .header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: rgba(255, 255, 255, 0.226);
    padding: 10px 20px;
  }

  /* Style for navbar */
  .navbar {
    list-style-type: none;
    margin: 0;
    padding: 0;
    text-align: center;
  }

  .navbar li {
    display: inline-block;
    margin-right: 20px;
  }

  .navbar li:last-child {
    margin-right: 0;
  }

  .navbar li a {
    font-size: 25px;
    text-decoration: none;
    color: #000000;
  }

  .navbar li a:hover{
    background-color: #383c41;
    color: white;
    padding: 15px;
    border-radius: 30px;
  }

  /* Style for buttons */
  .right {
    display: flex;
    justify-content: flex-end;
    align-items: center;
  }

  .left img {
    width: 80px; 
  }
  

  .btn {
    margin-left: 10px;
    padding: 8px 16px;
    background-color: #333;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
  }

  /* Responsive styles */
  @media screen and (max-width: 768px) {
    .header {
      flex-direction: column;
      padding: 20px;
    }

    .right {
      margin-top: 10px;
      justify-content: center;
    }
  }

  .container {
    position: absolute;
    width: 40%;
    top: 56%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(255, 255, 255, 0.21);
    box-shadow: 0 0 15px white;
    padding: 20px;
    border: 2px solid rgb(0, 0, 0);
    border-radius: 10px;
    max-width: 800px;
  }
  
  .container h1 {
    text-align: center;
    font-size: 30px;
    color: #000000;
    margin-bottom: 20px;
  }
  
  .form-group {
    margin-bottom: 15px;
  }
  
  input[type="text"] {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 16px;
  }
  
  .btn {
    background-color: #383c41;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 18px;
  }
  
  .btn:hover {
    background-color: #23262b;
  }
  
  /* Responsive CSS */
  @media (max-width: 1200px) {
    .container {
      width: 50%;
    }
  }
  
  @media (max-width: 992px) {
    .container {
      width: 60%;
    }
  }
  
  @media (max-width: 768px) {
    .container {
      width: 70%;
      padding: 15px;
    }
  
    .container h1 {
      font-size: 25px;
    }
  
    .btn {
      font-size: 16px;
      padding: 10px 15px;
    }
  }
  
  @media (max-width: 576px) {
    .container {
      width: 90%;
      padding: 10px;
      margin-top: 60px;
    }
  
    .container h1 {
      font-size: 20px;
    }
  
    .btn {
      font-size: 14px;
      padding: 8px 10px;
    }
  
    input[type="text"] {
      font-size: 14px;
    }
  }