rmcg.dev/freeCodeCamp/responsive-web-design-projects/Project2-BuildaSurveyForm/style.css

body {
    background-color: #679b9b;
    color: whitesmoke;
    text-align: center;
}

header {
    color: whitesmoke;
    text-align:center;
}

main {
    display: block;
    text-align: center;
}

form {
    background-color: #aacfcf;
    color: #b83b5e;
    padding: 2%;
    width: 50%;
    min-width: 450px;
    display: inline-block;
    text-align: left;
    font-size: large;
}

input[type=text], input[type=email], input[type=number], select, #dropdown, #preferredTimeOfDay, #chooseGender, textarea{
    width: 100%;
    padding: 12px;
    border: 2px solid rgb(181, 78, 255);
    border-radius: 4px;
    box-sizing: border-box;
    resize: vertical;
    font-size: medium;
  }

.submitButtonBox {
    text-align: center;
}

input[type=submit] {
    background-color: green;
    color: white;
    width:130px; height:50px; margin-top:8px;
    font-size: larger;
}

footer {
    padding-top: 1rem;
    font-size: larger;
}

@media screen and (max-width: 500px) {
    form {
        width: 90%;
        min-width: unset;
    }
}