* {
    padding: 0;
    margin: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

body {

}

.incorrect {
    border: 1px solid red;
    border-radius: 3px; 
}

.red {
    color: red;
}

.container {
    margin: auto;
    margin-top: 50px;
    width: 500px;
    padding: 10px;
}

.form-item {
    padding-top: 30px;
}

.submit {
    background-color: rgb(9, 9, 54);
    color: #fff;
    margin-top: 20px;
    width: 120px;
    height: 40px;
    text-align: center;
}

input {
    border: 1px solid transparent;
    border-radius: 3px;
    height: 20px;
    padding-top: 12px;
    padding-bottom: 12px;
    padding-left: 8px;
    padding-right: 8px;
    box-sizing: border-box;
}

#age, #name, #phone, #email {
    width: 100%;
    background-color: #eee;
}

#form-submit {
    margin-top: 20px;
}

.success {
    color: green;
}

.error {
    color: red;
}

.subtext {
    font-style: italic;
    color: #777;
    font-size: 14px;
}