style.css

body {
    margin: 0px;
    font-family: Arial;
}

.container {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    margin-top: 100px;
}

.titulo {
    text-align: center;
    width: 450px;
    border-bottom: 2px solid black;
}

.container-in {
    background-color: #ccc;
    font-weight: bold;
    padding-top: 5px;
    padding-left: 5px;
    margin-top: 10px;
    width: 500px;
    height: auto;
    box-shadow: 1px 1px 5px black;
    border: 2px solid black;
}

.container-in form {
    margin-top: 15px;
    margin-bottom: 15px;
    text-align: left;
    font-weight: normal;
}

form input {
    margin-bottom: 5px;
    outline: 0;
}

.container-in2 {
    background-color: #ccc;
    font-weight: bold;
    padding-top: 5px;
    padding-left: 5px;
    width: 500px;
    height: auto;
    box-shadow: 1px 1px 5px black;
    border: 2px solid black;
    margin-bottom: 50px;
}

.container-in2 div {
    font-weight: normal;
    margin: 10px;
    margin-right: 27px;
    float: left;
}