form.css

:root{
    --primary-collor:  rgb(31, 123, 151);
    --primary-collor-dark: rgb(49, 24, 121);
}


* {
    box-sizing: border-box;
    outline: 0;
}

body{
    margin: 0;
    padding: 0;
    background: var(--primary-collor);
    font-family: 'Open Sans', sans-serif;
    font-size: 1.3em;
    line-height: 1.5em;
}

.container {
    max-width: 640px;
    margin: 50px auto;
    background: #fff;
    padding: 20px;
    border-radius: 10px;
    }

form input, form label, form button {
    display: block;
    width: 100%;
    margin-bottom: 10px;
}

form input{
    font-size: 24px;
    height: 50px;
    padding: 0 20px;
}

form input:focus {
    outline: 1px solid var(--primary-collor)    
}

form button {
    border: none;
    background: var(--primary-collor);
    color: #fff;
    font-size: 18px;
    font-weight: 700;
    height: 50px;
    cursor: pointer;
    margin-top: 30px;
}

form button:hover {
    background: var(--primary-collor-dark);
}

.error-text{
    color: red;
    font-size: small;
}