body {
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    min-height: 100vh;
    min-height: 100dvh;
    margin: 0;
    padding: 10px;
    background-color: var(--form-background-color);
    box-sizing: border-box;
}

main {
    display: inline-block;
    width: 100%;
    max-width: 450px;
    border-radius: 30px;
    box-shadow: 0 0 10px var(--shadow-color);
    padding: 10px;
    background-color: var(--background-color);
    box-sizing: border-box;
}

span {
    display: inline-block;
}

form {
    margin: 15px 0;
    padding: 0 15px;
}
@media screen and (max-width: 450px) {
    form {
        padding: 0 5px;
    }
}

form div {
    margin: 10px 0;
}

form label {
    display: block;
    font-size: 20px;
}

form input[type='text'], form input[type='password'] {
    width: 100%;
}

form input[type='submit'] {
    width: 100%;
    height: 40px;
    margin-top: 5px;
}

form input[type='file'] {
    display: none;
}

.links {
    margin-top: 20px;
    margin-bottom: 10px;
}