.site-header{position:sticky;top:0;z-index:100;background:rgba(11,24,38,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}.nav{max-width:960px;margin:0 auto;padding:0 16px;height:52px;display:flex;align-items:center;justify-content:space-between}.nav-logo{font-family:var(--mono);font-size:13px;font-weight:600;letter-spacing:3px;color:var(--text-hi)}.nav-links{display:flex;gap:2px;list-style:none}.nav-links a{font-family:var(--mono);font-size:10px;letter-spacing:1px;color:var(--text-dim);padding:6px 10px;border-radius:var(--r);transition:color .2s,background .2s}.nav-links a:hover,.nav-links a.active{color:var(--green);background:rgba(0,229,170,7%)}.hamburger{display:none;flex-direction:column;gap:5px;background:0 0;border:none;padding:4px}.hamburger span{display:block;width:22px;height:2px;background:var(--text);border-radius:2px;transition:opacity .2s}.mobile-menu{display:none;flex-direction:column;border-top:1px solid var(--border);padding:8px 16px 12px}.mobile-menu a{font-family:var(--mono);font-size:11px;color:var(--text-dim);padding:11px 0;border-bottom:1px solid var(--border)}.mobile-menu a:last-child{border-bottom:none}.mobile-menu a:hover{color:var(--green)}.mobile-menu.open{display:flex}@media(max-width:640px){.nav-links{display:none}.hamburger{display:flex}}