.site-header{position:sticky;top:0;z-index:1000;background:var(--color-surface-limestone);border-bottom:1px solid var(--color-border-architectural);width:100%}
.header-inner{display:flex;align-items:center;justify-content:space-between;min-height:72px;width:100%;box-sizing:border-box}
.brand{display:flex;align-items:center;gap:0.6rem;min-width:0}
.brand-mark{width:44px;height:auto;flex-shrink:0}
.brand-text{font-family:var(--font-heading);font-size:1.15rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

.nav-toggle{display:none;flex-direction:column;justify-content:center;align-items:center;gap:4px;min-height:44px;min-width:44px;padding:8px;border-radius:var(--radius-sm);cursor:pointer;border:none;background:none;transition:background var(--transition-fast)}
.nav-toggle:hover{background:rgba(34,44,70,0.06)}
.nav-toggle-bar{width:22px;height:2px;background:var(--color-text-primary);transition:transform var(--transition-fast),opacity var(--transition-fast)}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.nav{display:block}
.nav-header{display:none}
.nav-close{display:inline-flex;position:relative;flex-direction:column;justify-content:center;align-items:center;min-height:44px;min-width:44px;padding:8px;border-radius:var(--radius-sm);cursor:pointer;border:none;background:none;transition:background var(--transition-fast)}
.nav-close:hover{background:rgba(34,44,70,0.06)}
.nav-close-bar{position:absolute;width:22px;height:2px;background:var(--color-text-primary);transition:transform var(--transition-fast)}
.nav-close-bar:nth-child(1){transform:rotate(45deg)}
.nav-close-bar:nth-child(2){transform:rotate(-45deg)}

.nav-list{display:flex;gap:1.2rem;list-style:none;margin:0;padding:0;align-items:center}
.nav-list li{margin:0;padding:0}
.nav a{font-size:var(--fs-sm);white-space:nowrap}

.nav-contact .button{margin-left:0.5rem}

.nav-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.4);z-index:999}

@media(max-width:1024px){
.nav-toggle{display:flex}
.nav-header{display:flex;justify-content:flex-end;width:100%;margin-bottom:1rem}
.nav{position:fixed;top:0;right:0;height:100vh;height:100dvh;width:min(280px,85vw);background:var(--color-surface-limestone);transform:translateX(100%);transition:transform var(--transition-fast);z-index:1001;padding:1.5rem;overflow-y:auto;box-shadow:-4px 0 20px rgba(0,0,0,0.15)}
.nav.open{transform:translateX(0)}
.nav-list{flex-direction:column;align-items:stretch;gap:1.2rem;width:100%}
.nav-list li{width:100%}
.nav-list a{display:block;padding:0.4rem 0;font-size:1rem}
.nav-contact .button{width:100%;margin-left:0;margin-top:0.8rem;text-align:center}
}

@media(max-width:600px){
.brand-mark{width:36px}
.brand-text{font-size:1rem}
.header-inner{min-height:60px}
}