:root {
    color-scheme: light dark;
    --background-color: hsl(252, 10%, 90%);
    --secondary-background-color: hsla(252, 10%, 80%);
    --primary-color: hsla(351, 21%, 21%);
    --warning-color: hsla(15, 81%, 51%);
}

@media (prefers-color-scheme: dark) {
    :root {
        --background-color: hsla(255, 8%, 10%);
        --secondary-background-color: hsla(252, 10%, 40%);
        --primary-color: hsla(351, 21%, 91%);
        --warning-color: hsla(15, 81%, 71%);
    }
}

body {
    background: var(--background-color);
    font-family: Helvetica, sans-serif;
    margin: 0;
    padding: 0;
}

#message {
    background: var(--secondary-background-color);
    max-width: 360px;
    margin: 100px auto 16px;
    padding: 32px 24px 16px;
    border-radius: 5px;
}

h1 {
    font-size: 44px;
    font-weight: 300;
    color: var(--primary-color);
    margin: 0 0 16px;
    text-align: center;
}

h1.warning {
    color: var(--warning-color);
}

#message, #message a {
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
}

@media (max-width: 600px) {
    body, #message {
        margin-top: 0;
        background: var(--background-color);
        box-shadow: none;
    }
}