:root {
    color-scheme: dark;
    font-family: Inter, system-ui, sans-serif;
    background: #0b1020;
    color: #e8ecf4;
}
* { box-sizing: border-box; }
body {
    margin: 0;
    min-height: 100vh;
    display: grid;
    place-items: center;
    background:
        radial-gradient(circle at 20% 10%, #25376c 0, transparent 35%),
        radial-gradient(circle at 80% 90%, #183f46 0, transparent 35%),
        #0b1020;
}
main {
    width: min(720px, calc(100% - 40px));
    padding: 48px;
    background: rgba(15, 22, 43, 0.88);
    border: 1px solid #33405f;
    border-radius: 24px;
    box-shadow: 0 24px 80px #0007;
}
h1 { margin-top: 0; font-size: clamp(2rem, 7vw, 4rem); }
p { color: #b7c0d5; line-height: 1.7; }
nav { display: flex; gap: 20px; margin-top: 32px; }
a { color: #72d7e5; text-decoration: none; }
a:hover { text-decoration: underline; }