body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 10px;
}
form {
    width: 500px;
    margin: 0 auto;
    text-align: left;
    padding: 20px;
    border: 1px solid #0c0c0c;
    border-radius: 5px;
    background-color: gainsboro;
}

button {
    background-color: green;
    color: white;
    font-size: 10px;
    margin-top: 10px;
    padding: 5px;
}

input {
    font-size: 10px;
    width: 180px;
}

select {
    font-size: 10px;
}

option {
    background-color: black;
    color: white;
}

.textomensaje {
    width: 430px;
    height: 50px;

}

.titulo {
    text-align: center;
}

.container{
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
}

.envio{
    text-align: center;
}