#header{position:fixed;top:0;left:0;right:0;height:var(--header-height);background:var(--header-bg);border-bottom:1px solid var(--border-color);z-index:1000;-webkit-backdrop-filter:saturate(180%)blur(20px);backdrop-filter:saturate(180%)blur(20px)}.header-container{max-width:1440px;margin:0 auto;height:100%;display:flex;align-items:center;justify-content:space-between;padding:0 var(--spacing-lg)}.logo{display:flex;align-items:center;text-decoration:none;transition:opacity var(--transition-fast)}.logo:hover{opacity:0.8}.logo-text{font-size:21px;font-weight:600;color:var(--text-primary);letter-spacing:-0.02em}.nav-menu{display:flex;align-items:center;gap:var(--spacing-sm)}.nav-item{position:relative}.nav-link{display:flex;align-items:center;gap:4px;padding:var(--spacing-xs)var(--spacing-sm);font-size:14px;font-weight:500;color:var(--text-primary);border-radius:8px;transition:background-color var(--transition-fast),color var(--transition-fast)}.nav-link:hover{background-color:rgba(0,0,0,0.04)}.nav-link.active{color:var(--accent-blue)}.dropdown-arrow{font-size:10px;margin-left:2px;transition:transform var(--transition-fast)}.nav-item-dropdown:hover .dropdown-arrow{transform:rotate(180deg)}.submenu{position:absolute;top:100%;left:0;min-width:180px;padding:var(--spacing-xs)0;background:var(--white);border:1px solid var(--border-color);border-radius:12px;box-shadow:0 10px 40px rgba(0,0,0,0.1);opacity:0;visibility:hidden;transform:translateY(-8px);transition:all var(--transition-fast);z-index:100}.nav-item-dropdown:hover .submenu{opacity:1;visibility:visible;transform:translateY(4px)}.submenu-item{display:block;padding:var(--spacing-xs)var(--spacing-sm);font-size:14px;color:var(--text-primary);transition:background-color var(--transition-fast)}.submenu-item:hover{background-color:var(--secondary-bg)}.header-actions{display:flex;align-items:center;gap:var(--spacing-sm)}.language-switcher{position:relative}.language-btn{display:flex;align-items:center;gap:4px;padding:var(--spacing-xs)var(--spacing-sm);font-size:14px;font-weight:500;color:var(--text-primary);background:transparent;border-radius:8px;transition:background-color var(--transition-fast)}.language-btn:hover{background-color:rgba(0,0,0,0.04)}.lang-arrow{font-size:10px;transition:transform var(--transition-fast)}.language-switcher.open .lang-arrow{transform:rotate(180deg)}.language-dropdown{position:absolute;top:100%;right:0;min-width:120px;padding:var(--spacing-xs)0;background:var(--white);border:1px solid var(--border-color);border-radius:12px;box-shadow:0 10px 40px rgba(0,0,0,0.1);opacity:0;visibility:hidden;transform:translateY(-8px);transition:all var(--transition-fast);z-index:100}.language-dropdown.show{opacity:1;visibility:visible;transform:translateY(4px)}.language-option{display:block;width:100%;padding:var(--spacing-xs)var(--spacing-sm);font-size:14px;color:var(--text-primary);text-align:left;transition:background-color var(--transition-fast)}.language-option:hover{background-color:var(--secondary-bg)}.language-option.active{color:var(--accent-blue)}.mobile-menu-btn{display:none;width:36px;height:36px;align-items:center;justify-content:center;border-radius:8px;transition:background-color var(--transition-fast)}.mobile-menu-btn:hover{background-color:rgba(0,0,0,0.04)}.hamburger{position:relative;width:16px;height:2px;background:var(--text-primary);transition:background var(--transition-fast)}.hamburger::before,.hamburger::after{content:'';position:absolute;left:0;width:100%;height:2px;background:var(--text-primary);transition:transform var(--transition-fast)}.hamburger::before{top:-5px}.hamburger::after{bottom:-5px}.mobile-menu-btn.active .hamburger{background:transparent}.mobile-menu-btn.active .hamburger::before{transform:rotate(45deg)translate(3px,3px)}.mobile-menu-btn.active .hamburger::after{transform:rotate(-45deg)translate(3px,-3px)}@media(max-width:768px){.header-container{padding:0 var(--spacing-sm)}.mobile-menu-btn{display:flex}.nav-menu{position:fixed;top:var(--header-height);left:0;right:0;bottom:0;flex-direction:column;align-items:stretch;padding:var(--spacing-md);background:var(--primary-bg);transform:translateX(100%);transition:transform var(--transition-normal);z-index:999}.nav-menu.mobile-open{transform:translateX(0)}.nav-item{border-bottom:1px solid var(--border-color)}.nav-link{padding:var(--spacing-sm);font-size:16px}.nav-item-dropdown .nav-link{justify-content:space-between}.submenu{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:none;background:var(--secondary-bg);border-radius:8px;margin-top:var(--spacing-xs)}.submenu-item{padding:var(--spacing-sm)}.language-dropdown{right:0}}@media(min-width:769px)and(max-width:1023px){.header-container{padding:0 var(--spacing-md)}.nav-link{padding:var(--spacing-xs)}}