:root {
    color-scheme: dark;
    --ink: #eaf2ff;
    --muted: #9eabc2;
    --line: rgba(194, 211, 242, 0.17);
    --accent: #8bd3ff;
    --background: #0a1020;
    --panel: rgba(19, 31, 57, 0.72);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--ink);
    background:
        radial-gradient(circle at 18% 15%, rgba(84, 154, 255, 0.22), transparent 35%),
        radial-gradient(circle at 82% 85%, rgba(92, 225, 207, 0.12), transparent 32%),
        var(--background);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.page-shell {
    width: min(1080px, calc(100% - 48px));
    margin: 0 auto;
    padding: 13vh 0 48px;
}

.eyebrow,
.card-index,
footer {
    color: var(--accent);
    letter-spacing: 0.14em;
    font-size: 0.72rem;
    font-weight: 700;
}

h1 {
    max-width: 740px;
    margin: 18px 0;
    font-size: clamp(2.8rem, 8vw, 6.8rem);
    line-height: 0.96;
    letter-spacing: -0.06em;
}

.lede {
    max-width: 580px;
    margin: 0;
    color: var(--muted);
    font-size: clamp(1.05rem, 2vw, 1.35rem);
    line-height: 1.6;
}

.cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 72px;
}

article {
    min-height: 220px;
    padding: 24px;
    border: 1px solid var(--line);
    border-radius: 20px;
    background: var(--panel);
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.18);
}

h2 {
    margin: 42px 0 12px;
    font-size: 1.35rem;
}

article p {
    margin: 0;
    color: var(--muted);
    line-height: 1.65;
}

footer {
    margin-top: 64px;
    color: var(--muted);
}

@media (max-width: 760px) {
    .page-shell {
        width: min(100% - 32px, 560px);
        padding-top: 72px;
    }

    .cards {
        grid-template-columns: 1fr;
        margin-top: 48px;
    }
}