.ec-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:var(--color-surface-elevated);backdrop-filter:blur(12px);border-bottom:1px solid var(--color-border-default);box-shadow:var(--shadow-glass);} 
.ec-header-inner{display:flex;align-items:center;justify-content:space-between;height:80px;gap:var(--space-4);} 
.ec-header-spacer{height:80px;} 
.ec-brand{display:flex;align-items:center;gap:12px;flex-shrink:0;} 
.ec-logo{height:48px;width:auto;} 
.ec-brand-text{font-family:var(--font-heading);font-size:32px;line-height:1;} 

.ec-nav{display:flex;} 
.ec-nav-list{display:flex;align-items:center;gap:32px;margin:0;padding:0;} 
.ec-nav-list li{margin:0;padding:0;} 
.ec-nav-list a{font-size:14px;letter-spacing:0.12em;text-transform:uppercase;color:var(--color-text-primary);position:relative;} 
.ec-nav-list a::after{content:"";position:absolute;left:50%;bottom:-6px;width:0;height:1px;background:var(--color-brand-primary);transition:all var(--transition-base);} 
.ec-nav-list a:hover::after{left:0;width:100%;} 

.ec-nav-contact a{padding:10px 20px;} 

.ec-nav-toggle{display:none;width:44px;height:44px;align-items:center;justify-content:center;} 
.ec-nav-toggle span{display:block;width:22px;height:2px;background:var(--color-text-primary);} 

@media(max-width:900px){
.ec-header-inner{height:72px;} 
.ec-header-spacer{height:72px;} 
.ec-logo{height:36px;} 
.ec-brand-text{font-size:20px;} 

.ec-nav{position:fixed;top:72px;right:0;width:280px;height:calc(100vh - 72px);background:var(--color-surface-elevated);backdrop-filter:blur(16px);border-left:1px solid var(--color-border-default);transform:translateX(100%);transition:transform var(--transition-base);display:flex;} 
.ec-nav.open{transform:translateX(0);} 
.ec-nav-list{flex-direction:column;align-items:flex-start;padding:24px;gap:20px;width:100%;overflow-y:auto;} 

.ec-nav-toggle{display:flex;} 
}