.site-header{position:sticky;top:0;z-index:50;border-bottom:1px solid var(--border-subtle);background:color-mix(in srgb,var(--canvas-0) 90%,transparent);backdrop-filter:blur(18px);isolation:isolate}
.site-header__inner,.site-footer__inner{max-width:var(--content-max);margin:auto;padding-left:32px;padding-right:32px}.site-header__inner{padding-top:15px;padding-bottom:15px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand-lockup{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:750}.brand-mark{width:31px;height:31px;filter:drop-shadow(0 0 14px rgba(93,156,255,.18))}.brand-word{font-size:1.05rem}.brand-word span{color:var(--accent-violet)}
.primary-nav{display:flex;align-items:center;gap:17px}.primary-nav>a,.nav-group>a{text-decoration:none;font-weight:620;font-size:.88rem;color:var(--text-secondary)}.primary-nav>a:hover,.nav-group>a:hover{color:var(--text-primary)}.nav-group{display:flex;gap:12px;align-items:center}.nav-group__label{font-weight:700;color:var(--text-primary)}.menu-toggle{display:none;min-height:42px;border:1px solid var(--border-strong);background:var(--surface-1);color:var(--text-primary);border-radius:12px;padding:8px 12px}
.section-heading{max-width:880px;margin-bottom:48px}.button-row{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin-top:28px}
.site-footer{border-top:1px solid var(--border-subtle);background:var(--canvas-1)}.site-footer__inner{display:grid;grid-template-columns:1fr auto;gap:30px;padding-top:42px;padding-bottom:42px}.footer-links{display:grid;grid-template-columns:repeat(2,auto);gap:9px 22px}.footer-links a{color:var(--text-secondary)}.footer-links a:hover{color:var(--text-primary)}.operator-note{grid-column:1/-1;color:var(--text-muted);font-size:.86rem;margin:6px 0 0}
@media(max-width:980px){.menu-toggle{display:flex;gap:8px;align-items:center}.primary-nav{display:none;position:absolute;top:68px;left:16px;right:16px;z-index:60;background:var(--surface-elevated);padding:20px;border:1px solid var(--border-strong);border-radius:18px;box-shadow:var(--shadow-soft);flex-direction:column;align-items:stretch}.primary-nav[data-open]{display:flex}.nav-group{flex-direction:column;align-items:flex-start}.site-header__inner,.site-footer__inner{padding-left:20px;padding-right:20px}.site-footer__inner{grid-template-columns:1fr}.operator-note{grid-column:auto}}