body {
    background-color: #f4f4f4;
    font-family: Arial, sans-serif;
    margin: 20px;
}

.page.active {
    display: block;
}

.nav {
    text-align: center;
    margin-top: 20px;
}

.nav a {
    margin: 0 10px;
    text-decoration: none;
    color: blue;
}

h1 {
text-align: center;
color: #333;
}

textarea {
width: 100%;
height: 200px;
padding: 10px;
font-size: 16px;
border: 2px solid #ccc;
}

button {
padding: 10px 20px;
font-size: 16px;
background-color: #008CBA;
color: #fff;
border: none;
border-radius: 4px;
cursor: pointer;
margin-top: 10px;
}

button:hover {
    background-color: #b2d3f4;
}

nav {
    background-color: #333;
    height: 50px;
    border:0;
  }
  
  ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    /* justify-content: space-between; */
    align-items: left;
    height: 100%;
  }
  
  li {
    height: 100%;
  }
  
  a {
    color: #fff;
    text-decoration: none;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0 20px;
  }
  
  a:hover {
    background-color: #9b9c9d;
  }