.appDescription h1 {
    padding: 6% 10%;
    text-align: center;
    color: green;
    background-color: lightgreen;
}
            
.appDescription p {
    text-align: justify;        
}
        
form {
    display: flex;
    flex-flow: column wrap;
    justify-content: flex-start;
    align-items: start;
}
            
form label {
    margin: 1% 0;
}

form input {
    height: 20px;
}
            
form button {
    margin-top: 1%;
    padding: 1% 4%;
    border: none;
    border-radius: 5px;
    color: white;
    background-color: green;
}