:root {
    --main-color: #f54b55;
    --second-color: #efeff0;
  }
  * {
    margin: 0;
    padding: 0;
    font-family: "Poppins", sans-serif;
    box-sizing: border-box;
  }
  a {
    text-decoration: none;
    color: #5a5a5a;
  }
  img {
    cursor: pointer;
    /* width: 5%; */
  }
  
  #lang {
    margin-right: 5px;
  }
  
  span {
    text-decoration: none;
    color: #5a5a5a;
  }
  
  .container {
    background: #fff;
    height: 100vh;
    width: 100%;
  }
  
  .card img {
    transition: all 0.3s ease;
  }
  
  .card:hover img {
    opacity: 0.7;
  }
  
  .card-body {
    text-align: center;
  }
  
  .card-title {
    text-transform: uppercase;
  }
  
  .card-text {
    color: #5a5a5a;
  }
  
  .btn {
    width: 100%;
  }
  
  .card-body .lecBtn {
    background: #b35aae;
    width: 70%;
    color: #fff;
  }
  
  .card-body .lecBtn:hover {
    background: #a752a1;
    color: #fff;
  }
  
  .card-body .lecBtn2 {
    border: 1px solid #b35aae;
    width: 25%;
    color: #b35aae;
    transition: all 0.3s ease;
    margin-left: 10px;
  }
  
  .card-body .lecBtn2:hover {
    background: #b35aae;
    color: #fff;
  }
  
  .card-body .stdBtn {
    width: 70%;
  }
  
  .card-body .stdBtn2 {
    width: 25%;
    margin-left: 10px;
  }
  
  @media (max-width: 900px) {
    .flex-div{
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 0 20px;
    }
  }
  
  /* header */
  .flex-div {
    display: flex;
    align-items: center;
  }
  
  nav {
    padding: 10px 2%;
    justify-content: space-between;
    box-shadow: 0 0 10px rgba(0 0 0 / 0.2);
    background-color: #fff;
    position: sticky;
    top: 0;
    z-index: 10;
    height: 50px;
  }
  
  .nav-left {
    display: flex;
    flex-direction: row;
  }
  
  .nav-left img {
    width: 25px;
    margin-right: 25px;
  }
  
  .nav-left .logo {
    width: 35px;
  }
  
  .nav-middle {
    display: flex;
    flex-direction: row;
    align-items: center;
  }
  
  .nav-middle img {
    width: 16px;
  }
  
  .nav-middle .search-box {
    border: 1px solid #ccc;
    margin-right: 15px;
    padding: 8px 12px;
    border-radius: 25px;
  }
  
  .nav-middle .search-box input {
    width: 400px;
    border: 0;
    outline: 0;
    background: transparent;
  }
  
  .nav-middle .search-box img {
    width: 15px;
  }
  
  .nav-right {
    display: flex;
    flex-direction: row;
  }
  
  .nav-right .profile {
    display: flex;
    flex-direction: row;
  }
  
  .nav-right .profile a {
    padding-right: 15px;
    text-decoration: none;
    color: #5a5a5a;
    font-weight: 600;
  }