html {
    color-scheme: dark;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family:
        Inter,
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;
    color: #edf2f7;
    background:
        radial-gradient(
            circle at top,
            #17233f 0,
            #080d18 58%,
            #05080e 100%
        );
}

.demo-shell {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 32px;
}

.demo-card {
    width: min(900px, 100%);
    padding: clamp(32px, 7vw, 76px);
    border: 1px solid rgba(255,255,255,.14);
    border-radius: 28px;
    background: rgba(10,16,30,.78);
    box-shadow: 0 32px 90px rgba(0,0,0,.38);
}

.eyebrow {
    margin: 0 0 18px;
    font-size: .82rem;
    font-weight: 800;
    letter-spacing: .16em;
    text-transform: uppercase;
    opacity: .64;
}

h1 {
    margin: 0;
    max-width: 760px;
    font-size: clamp(2.5rem, 7vw, 5.8rem);
    line-height: .98;
    letter-spacing: -.055em;
}

.message {
    max-width: 680px;
    margin: 30px 0 0;
    font-size: clamp(1.05rem, 2.4vw, 1.45rem);
    line-height: 1.55;
    opacity: .76;
}

.banner {
    margin-top: 34px;
    padding: 18px 22px;
    border: 1px solid rgba(255,255,255,.18);
    border-radius: 16px;
    font-weight: 700;
    background: rgba(255,255,255,.07);
}

.contact {
    margin-top: 24px;
    font-size: 1rem;
    opacity: .7;
}

footer {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 24px;
    margin-top: 58px;
    padding-top: 22px;
    border-top: 1px solid rgba(255,255,255,.1);
    font-size: .82rem;
    opacity: .48;
}