.site-header{position:sticky;top:0;z-index:50;background:rgba(17,24,39,0.85);backdrop-filter: blur(8px);border-bottom:1px solid var(--border)}
.header-inner{max-width:980px;margin:0 auto;padding:12px 24px;display:flex;align-items:center;justify-content:space-between}
.brand{font-weight:900;font-size:22px;letter-spacing:0.5px;text-decoration:none}
.nav{display:flex;gap:10px}
.nav-link{display:inline-flex;align-items:center;gap:6px;padding:8px 10px;border-radius:10px;border:1px solid transparent;color:var(--text);text-decoration:none;opacity:.9}
.nav-link:hover{border-color:var(--border);opacity:1}
.header-accent{height:3px;background:var(--accent)}