:root {
  --yellow: #ffff00;
}
img {
    border: 1px solid #ddd;
    height: 200px;
    border-radius: 4px;
    padding: 5px;
    width: 300;
    transition: transform 0.25s ease;
  
  }
  
  img:hover {
    box-shadow: 0 0 2px 1px rgba(0, 140, 186, 0.5);
  }
  img {
    transition:transform 0.25s ease;
}

img:hover {
    -webkit-transform:scale(1.5); /* or some other value */
    transform:scale(1.5);
}
#navbar {
  width: 30vw;
  background-color: gray;
  font-weight: bold;
}
  ul {
    list-style: none;
    margin: 0;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding: 1em 0;
    font-family: 'Courier New', Courier, monospace;
    font-size: 30;
  }

  li a {
    text-decoration: none;
    color: black;
    padding-right: 3em;
    position: relative;
    transition: all ease-in-out 150ms;
  }

  li a::after {
    content: "";
    position: absolute;
    display: block;
    height: 0.4em;
    width: 0%;
    background-color: var(--yellow);
    bottom: 0em;
    transition: all ease-in-out 450ms;
  }

  li a:hover::after {
    width: 60%;
  }

  li a:hover {
    color: var(--yellow);
  }

  li:first-child {
    margin-right: right;
    margin-left: 3em;
  }