*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Poppins", sans-serif;
  }
  
  body {
    min-height: 100vh;
    background: url('https://images.hdqwalls.com/wallpapers/nature-hd-sd.jpg') no-repeat;
    background-size: cover;
    background-position: center;
  }
  
  .side-bar {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(8px);
    width: 290px;
    height: 100vh;
    position: fixed;
    top: 0;
    left: -100%;
    overflow-y: auto; 
    transition: .6s ease;
    transition-property: left;
  }
  
  .side-bar.active {
    left: 0;
  }
  
  .side-bar::-webkit-scrollbar { 
      display: none;
  }
  
  .side-bar .menu {
    width: 100%;
    margin-top: 80px;
  }
  
  .side-bar .menu .item {
    position: relative;
    cursor: pointer;
  }
  
  .side-bar .menu .item a {
    color: #fff;
    font-size: 16px;
    text-decoration: none;
    display: block;
    padding: 5px 30px;
    line-height: 60px;
  }
  
  .side-bar .menu .item a:hover {
    background:#05CBE3;
    transition: 0.3s ease;
  }
  
  .side-bar .menu .item i {
    margin-right: 15px;
  }
  
  .side-bar .menu .item a .dropdown {
    position: absolute;
    right: 0;
    margin: 20px;
    transition: 0.3s ease;
  }
  
  .side-bar .menu .item .sub-menu {
    background: rgba(255, 255, 255, 0.1);
    display: none;
  }
  
  .side-bar .menu .item .sub-menu a {
    padding-left: 80px;
  }
  
  .rotate {
    transform: rotate(90deg)
  }
  
  .close-btn {
    position: absolute;
    color: #fff;
    font-size: 30px;
    right: 0;
    margin: 25px;
    cursor: pointer;
  }
  
  .menu-btn {
    position: absolute;
    color: #fff;
    font-size: 30px;
    margin: 25px;
    cursor: pointer;
  }
  
  .main {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 50px;
  }
  
  .main h1 {
    color: rgba(0, 0, 0, 0.7);
    font-size: 60px;
    text-align: center;
    line-height: 80px;
    padding: 4rem;
    border: 2px solid rgba(255, 255, 255, 0.5);
    
  }
  
  @media (max-width: 900px) {
    .main h1 {
      font-size: 40px;
      line-height: 70px;
      padding: 2rem;
    }
  }