.site-header {
    position: sticky;
    top: 0;
    z-index: 100;

    backdrop-filter: blur(18px);

    background:
        linear-gradient(
            180deg,
            rgba(3, 7, 18, 0.96),
            rgba(3, 7, 18, 0.82)
        );

    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.nav-shell {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;

    min-height: 72px;
}

.brand-mark {
    font-size: 1.15rem;
    font-weight: 800;
    letter-spacing: -0.025em;

    background: linear-gradient(90deg, var(--white), var(--pale-blue) 55%, var(--pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 1.75rem;
}

.site-nav a {
    position: relative;

    padding: 1.4rem 0;

    color: var(--text-soft);

    font-weight: 700;

    transition: color 0.25s ease;
}

.site-nav a::after {
    content: "";

    position: absolute;
    left: 0;
    bottom: 0.95rem;

    width: 100%;
    height: 2px;

    background: linear-gradient(90deg, var(--blue), var(--pink));

    transform: scaleX(0);
    transform-origin: left;

    transition: transform 0.25s ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
    color: var(--white);
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
    transform: scaleX(1);
}

.site-main {
    min-height: calc(100vh - 160px);
}

.site-footer {
    border-top: 1px solid rgba(150, 175, 255, 0.12);

    background:
        radial-gradient(circle at 20% 0%, rgba(120, 157, 248, 0.08), transparent 28%),
        radial-gradient(circle at 90% 0%, rgba(221, 166, 248, 0.06), transparent 26%),
        linear-gradient(180deg, rgba(4, 7, 17, 0.9), rgba(2, 4, 12, 0.98));
}

.footer-shell {
    display: flex;
    justify-content: space-between;
    gap: 2rem;

    padding: 2.25rem 0;
}

.footer-brand {
    margin-bottom: 0.45rem;

    font-weight: 800;

    background: linear-gradient(90deg, var(--white), var(--pale-blue), var(--pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-copy {
    max-width: 32rem;
    color: var(--text-soft);
}

.footer-links {
    display: grid;
    gap: 0.75rem;
}

.footer-links a {
    color: var(--text-soft);
}

.footer-links a:hover,
.footer-links a:focus-visible {
    color: var(--white);
}

@media (max-width: 860px) {
    .nav-shell,
    .footer-shell {
        flex-direction: column;
        align-items: flex-start;
    }

    .nav-shell {
        padding: 1rem 0;
    }

    .site-nav {
        flex-wrap: wrap;
        gap: 1rem;
    }
}