:root {
    color-scheme: dark;
    --bg: #070907;
    --surface: rgba(255, 255, 255, 0.08);
    --surface-strong: rgba(255, 255, 255, 0.12);
    --border: rgba(255, 255, 255, 0.13);
    --text: #f5f7f2;
    --muted: rgba(245, 247, 242, 0.68);
    --accent: #54a3ff;
    --accent-soft: rgba(84, 163, 255, 0.16);
    --radius: 22px;
}

* {
    box-sizing: border-box;
}

html {
    background: var(--bg);
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background:
        radial-gradient(circle at top left, rgba(84, 163, 255, 0.16), transparent 34rem),
        var(--bg);
    color: var(--text);
}

a {
    color: inherit;
}

.shell {
    width: min(920px, calc(100% - 32px));
    margin: 0 auto;
    padding: 28px 0 56px;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 56px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    font-weight: 800;
    letter-spacing: 0;
}

.mark {
    width: 34px;
    height: 34px;
    display: inline-block;
    object-fit: contain;
    filter: drop-shadow(0 0 18px rgba(84, 163, 255, 0.24));
}

.links {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.links a,
.button {
    min-height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0 16px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--surface);
    color: var(--text);
    text-decoration: none;
    font-size: 14px;
    font-weight: 700;
    backdrop-filter: blur(18px);
}

.hero {
    padding: 32px;
    border: 1px solid var(--border);
    border-radius: calc(var(--radius) + 8px);
    background: linear-gradient(145deg, var(--surface-strong), rgba(255, 255, 255, 0.05));
    backdrop-filter: blur(24px);
}

.eyebrow {
    margin: 0 0 14px;
    color: var(--accent);
    font-size: 13px;
    font-weight: 800;
}

h1 {
    margin: 0;
    max-width: 760px;
    font-size: clamp(40px, 7vw, 74px);
    line-height: 0.95;
    letter-spacing: 0;
}

.lead {
    max-width: 620px;
    margin: 20px 0 0;
    color: var(--muted);
    font-size: 18px;
    line-height: 1.6;
    font-weight: 550;
}

.grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    margin-top: 18px;
}

.card,
.content {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    backdrop-filter: blur(18px);
}

.card {
    padding: 20px;
}

.card h2,
.content h2 {
    margin: 0 0 10px;
    font-size: 20px;
}

.card p,
.content p,
.content li {
    color: var(--muted);
    font-size: 15px;
    line-height: 1.65;
}

.content {
    margin-top: 18px;
    padding: 28px;
}

.content h1 {
    font-size: clamp(34px, 6vw, 58px);
}

.content h2 {
    margin-top: 30px;
}

.content ul {
    padding-left: 20px;
}

.meta {
    margin: 12px 0 0;
    color: var(--muted);
    font-size: 14px;
}

.footer {
    margin-top: 30px;
    color: var(--muted);
    font-size: 13px;
    text-align: center;
}

@media (max-width: 720px) {
    .shell {
        width: min(100% - 24px, 920px);
        padding-top: 18px;
    }

    .nav {
        align-items: flex-start;
        margin-bottom: 32px;
    }

    .links {
        gap: 8px;
    }

    .links a {
        min-height: 36px;
        padding: 0 12px;
        font-size: 13px;
    }

    .hero,
    .content {
        padding: 22px;
    }

    .grid {
        grid-template-columns: 1fr;
    }
}