.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000}
.announcement-bar{background:var(--color-accent-copper);color:#000;font-size:0.8rem}
.announcement-inner{padding:0.4rem 0;text-align:center}
.header-main{margin:0.5rem auto;width:calc(100% - 2rem);border-radius:var(--radius-lg)}
.header-row{display:flex;align-items:center;justify-content:space-between;gap:var(--space-3);min-height:72px}
.brand{display:flex;align-items:center;gap:0.6rem}
.brand-mark{height:52px;width:auto}
.brand-text{font-family:var(--font-heading);letter-spacing:0.08em}
.nav-toggle{display:none;flex-direction:column;gap:4px;padding:0.5rem}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--color-text-primary)}
.nav{display:flex}
.nav-list{display:flex;gap:1.5rem;margin:0;padding:0;align-items:center;list-style:none}
.nav-list li{margin:0}
.nav-list a{font-size:0.85rem;letter-spacing:0.08em;text-transform:uppercase;color:var(--color-text-secondary)}
.nav-list a:hover{color:var(--color-accent-turquoise)}
.header-spacer{height:110px}
@media(max-width:900px){
.nav-toggle{display:flex;z-index:1001}
.nav{position:fixed;top:0;right:0;height:100vh;width:80%;max-width:320px;background:var(--color-surface-glass);backdrop-filter:blur(12px);transform:translateX(100%);transition:0.3s}
.nav.open{transform:translateX(0)}
.nav-list{flex-direction:column;padding:5rem 1.5rem}
}