body {
    font-family: Arial, sans-serif;
    background-color: gray;
}
h1 {
    text-align: center;
}
form {
    background: white;
    padding: 15px;
    border-radius: 8px;
    margin: auto;
}
button {
    padding: 5px 10px;
    cursor: pointer;
}
button:hover {
    background-color: lightblue;
}
#tulemus {
    background: white;
    margin: 20px auto;
    padding: 10px;
    border-radius: 8px;
    box-shadow: 0 0 5px gray;
}

.error {
    color: red;
    font-size: 0.9em;
}

.error-field {
    border: 1px solid red;
}