/* Shared site chrome: sticky top nav + footer (used on every page) */
.topnav {
    position: sticky;
    top: 0;
    z-index: 950;
    background: rgba(255, 255, 255, 0.9);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid #e8ecf2;
}
.topnav .inner {
    max-width: 1024px;
    margin: 0 auto;
    padding: 0.75rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}
.topnav .brand {
    font-weight: 800;
    font-size: 1.2rem;
    letter-spacing: -0.02em;
    color: #0f172a;
    text-decoration: none;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}
.topnav .brand span { color: #2563eb; }
.topnav nav { display: flex; gap: 1.5rem; align-items: center; }
.topnav nav a {
    color: #475569;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}
.topnav nav a:hover { color: #2563eb; }
.topnav .nav-cta {
    background: #2563eb;
    color: #fff;
    padding: 0.5rem 1.1rem;
    border-radius: 0.5rem;
}
.topnav .nav-cta:hover { background: #1d4ed8; color: #fff; }
@media (max-width: 600px) {
    .topnav nav a.hide-sm { display: none; }
    .topnav nav { gap: 0; }
}

.site-footer {
    background: #1f2937;
    color: #d1d5db;
    margin-top: 4rem;
    padding: 2.5rem 1.5rem;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}
.site-footer .inner {
    max-width: 1024px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}
.site-footer h3 { color: #fff; font-size: 0.95rem; margin: 0 0 0.75rem; }
.site-footer a { color: #93c5fd; text-decoration: none; font-size: 0.9rem; }
.site-footer a:hover { text-decoration: underline; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 0.5rem; }
.site-footer p { font-size: 0.9rem; line-height: 1.6; color: #9ca3af; margin: 0; }
.site-footer .copy {
    max-width: 1024px;
    margin: 2rem auto 0;
    padding-top: 1.5rem;
    border-top: 1px solid #374151;
    font-size: 0.8rem;
    color: #9ca3af;
}