/* ===== Top navigation styling ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 3rem;
    background: rgba(0, 0, 0, 0.25);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255,255,255,0.05);
    z-index: 10;
}

.brand {
    color: #f9f9f9;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    letter-spacing: 0.5px;
}

.site-nav a {
    color: #ccc;
    text-decoration: none;
    margin-left: 2rem;
    font-size: 0.95rem;
    letter-spacing: 0.4px;
    transition: color 0.25s ease;
}

    .site-nav a:hover {
        color: #fff;
    }

/* Keep hero content below fixed header */
.site-main {
    padding-top: 80px;
    background: transparent;
}

/* Optional: responsive tweaks */
@media (max-width: 768px) {
    .site-header {
        padding: 0.75rem 1.5rem;
    }

    .site-nav a {
        margin-left: 1rem;
    }
}
/* Keep hero content below fixed header */
.site-main {
    padding-top: 80px;
}

/* Optional: responsive tweaks */
@media (max-width: 768px) {
    .site-header {
        padding: 0.75rem 1.5rem;
    }

    .site-nav a {
        margin-left: 1rem;
    }
}
#bg-container,
#bg-container #constellation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none; /* lets clicks pass through */
}

#bg-container {
    z-index: 0;
}

#constellation {
    z-index: 1;
}