html {
    color-scheme: dark;
    background: #0d1928;
    color: #f5f7fa;
}
body {
    margin: 0;
    min-height: 100svh;
    display: grid;
    place-items: center;
    font:
        1rem/1.5 system-ui,
        sans-serif;
}
main {
    max-width: 28rem;
    padding: 2rem 1.5rem;
    text-align: center;
}
h1 {
    margin: 1rem 0 0.5rem;
    font-size: 1.75rem;
}
p {
    margin: 0.5rem 0 1.5rem;
}
.open-app {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 0.5rem;
    background: #28c7ff;
    color: #0d1928;
    font-weight: 650;
    text-decoration: none;
}
.open-app:focus-visible {
    outline: 3px solid #f5f7fa;
    outline-offset: 4px;
}
.hint {
    margin-top: 1.5rem;
    color: #bac6d3;
    font-size: 0.875rem;
}