html, body {
    box-sizing: border-box;
    min-height: 100dvh;
    margin: 0;
    padding: 0;
}
body{
    background: url('mini.png') 50% 50% space;
    background-size: 10rem;
    font-family: 'Segoe UI', Roboto, Tahoma, Geneva, Verdana, sans-serif;
}

body.valido{ color: #005294; }
body.invalido{ color: #FF030E; }

main{
    display: flex;
    flex-direction: column;
    flex-wrap: nowrap;
    align-items: center;
    justify-content: center;
    width:100dvw;
    min-height: 100dvh;
    background-color: #FFFFFFFB;
}

#logo {
    width: 300px;
    height: 90px;
    padding: 3rem;
    background: url('logo_sonda_escola.png') 50% 50% no-repeat;
    background-size: contain;
}

h2{ 
    font-size:3rem;
    margin:0 auto 3rem auto;
    padding: 0;
}
p{
    margin:0;
    line-height: 1.4;
}

form{
    margin: 2rem auto;
}

input[type="text"] {
    padding: 1rem 2rem;
}

input[type="submit"] {
    padding: 2rem;
    cursor: pointer;
}