.header{display:flex;justify-content:space-between;align-items:center;padding:var(--spacing-4) var(--spacing-8);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);box-shadow:var(--shadow-md);position:fixed;left:0;right:0;z-index:var(--z-150);transition:all var(--transition-normal) var(--ease-in-out)}.header,.white-space-menu{top:0;width:100%;height:80px}.white-space-menu{position:-webkit-sticky;position:sticky;z-index:var(--z-90)}.header.scrolled{padding:var(--spacing-3) var(--spacing-8);box-shadow:var(--shadow-lg)}.logo{display:flex;align-items:center;gap:var(--spacing-2);font-size:var(--text-2xl);font-weight:700;color:var(--primary-700);transition:transform var(--transition-normal) var(--ease-in-out)}.logo:hover{transform:scale(1.05)}.logo>a{display:flex;justify-content:center;align-items:center}.logo img{height:40px;filter:drop-shadow(0 2px 4px rgba(0,0,0,.1));transition:transform var(--transition-normal) var(--ease-in-out)}.logo:hover img{transform:rotate(5deg)}.nav-menu{display:flex;gap:var(--spacing-8)}.nav-link{color:var(--neutral-700);text-decoration:none;font-weight:500;transition:all var(--transition-normal) var(--ease-in-out);padding:var(--spacing-2) 0;position:relative;letter-spacing:.02em;display:flex;align-items:center;gap:var(--spacing-2)}.nav-link:hover{color:var(--primary-600)}.nav-link:after{content:"";position:absolute;bottom:0;left:calc(-1 * var(--spacing-1));width:0;height:1px;background-color:var(--primary-600);transition:width var(--transition-normal) var(--ease-in-out)}.nav-link:hover:after{width:calc(100% + var(--spacing-2))}.auth-buttons{display:flex;gap:var(--spacing-4)}.header .btn{padding:var(--spacing-2) var(--spacing-5);border-radius:var(--radius-md);font-weight:500;cursor:pointer;transition:all var(--transition-normal) var(--ease-in-out);text-decoration:none;letter-spacing:.02em;box-shadow:var(--shadow-sm)}.header .btn-outline{border:2px solid var(--primary-600);color:var(--primary-600);background-color:transparent}.header .btn-outline:hover{background-color:var(--primary-600);color:white;transform:translateY(-2px);box-shadow:var(--shadow-md)}.menu-button{display:none;background:none;border:none;cursor:pointer;padding:var(--spacing-2);z-index:var(--z-50)}.hamburger{display:flex;flex-direction:column;justify-content:space-between;width:24px;height:18px;position:relative}.hamburger-line{width:100%;height:2px;background:var(--neutral-800);transition:transform .3s cubic-bezier(.25,1,.5,1),opacity .2s ease;position:absolute;left:0}.hamburger-line:first-child{top:0}.hamburger-line:nth-child(2){top:8px}.hamburger-line:nth-child(3){top:16px}.mobile-menu-open .hamburger-line:first-child{transform:translateY(8px) rotate(45deg);background-color:var(--primary-600)}.mobile-menu-open .hamburger-line:nth-child(2){opacity:0;transform:translateX(-20px)}.mobile-menu-open .hamburger-line:nth-child(3){transform:translateY(-8px) rotate(-45deg);background-color:var(--primary-600)}.hamburger:hover .hamburger-line{background:var(--primary-600)}.mobile-auth-buttons{display:none}@media (max-width:1300px){.nav-menu{display:none;position:fixed;top:80px;left:0;right:0;background-color:rgba(15,23,42,.98);flex-direction:column;padding:var(--spacing-6) var(--spacing-4);box-shadow:var(--shadow-lg);z-index:var(--z-40);opacity:0;transform:translateY(-20px);transition:opacity .4s cubic-bezier(.25,1,.5,1),transform .4s cubic-bezier(.25,1,.5,1);align-items:center;gap:var(--spacing-6);max-height:calc(100vh - 80px);overflow-y:auto}.mobile-menu-open .nav-menu{display:flex;opacity:1;transform:translateY(0)}.nav-menu>a,.nav-menu>div{opacity:0;transform:translateY(-10px);transition:opacity .3s ease,transform .3s ease;transition-delay:calc(var(--item-index, 0) * .05s);width:100%;text-align:left}.mobile-menu-open .nav-menu>a,.mobile-menu-open .nav-menu>div{opacity:1;transform:translateY(0)}.nav-menu .nav-link{color:var(--neutral-300)}.menu-button{display:block}.auth-buttons{display:flex}@media (max-width:1300px){.auth-buttons{display:none}.mobile-auth-buttons{display:none;width:100%;margin-top:var(--spacing-6);gap:var(--spacing-4);flex-direction:column;opacity:0;transform:translateY(-10px);transition:opacity .3s ease,transform .3s ease;transition-delay:.3s}.mobile-menu-open .mobile-auth-buttons{display:flex;opacity:1;transform:translateY(0)}.mobile-auth-buttons .btn{text-align:center;justify-content:center;border-radius:var(--radius-md);padding:var(--spacing-3) var(--spacing-4);transition:all .3s ease}.mobile-auth-buttons .btn-outline{border:1px solid var(--primary-400);color:var(--primary-400);background-color:transparent}.mobile-auth-buttons .btn-outline:hover{background-color:rgba(59,130,246,.1)}}.nav-link{font-size:var(--text-lg);padding:var(--spacing-3) var(--spacing-4);position:relative;width:100%;text-align:left;display:flex;align-items:center;gap:var(--spacing-3);color:var(--neutral-300)}.nav-link .nav-icon{display:inline-flex;align-items:center;justify-content:center;font-size:1.2em}.nav-link:hover{background-color:rgba(59,130,246,.1);color:var(--primary-400)}.nav-link.active{background-color:rgba(59,130,246,.15);color:var(--primary-400);font-weight:500}.dropdown-content{background-color:rgba(15,23,42,.95);border-top:1px solid rgba(59,130,246,.2);border-bottom:1px solid rgba(59,130,246,.2)}.dropdown-item{color:var(--neutral-300);padding-left:var(--spacing-8)}.dropdown-item:hover{background-color:rgba(59,130,246,.1);color:var(--primary-400)}.header .logo{z-index:var(--z-110)}}@media (max-width:480px){.header{padding:var(--spacing-4)}.header.scrolled{padding:var(--spacing-3)}.logo span{display:none}}.header{background-color:rgba(15,23,42,.95)}.logo{color:var(--primary-400)}.nav-link{color:var(--neutral-300)}.nav-link:hover{color:var(--primary-400)}.hamburger-line{background:var(--neutral-300)}.hamburger:hover .hamburger-line{background:var(--primary-400)}@media (max-width:1300px){.auth-buttons,.nav-menu{background-color:rgba(15,23,42,.95)}}.nav-link:after{background-color:var(--primary-400)}.header .btn-outline{border-color:var(--primary-400);color:var(--primary-400)}.header .btn-outline:hover{background-color:var(--primary-400);color:var(--neutral-900)}.menu-button{color:var(--neutral-300)}.menu-button:hover{color:var(--primary-400)}@media (max-width:768px){.nav-menu{background-color:var(--neutral-900)}}.nav-dropdown{position:relative;display:inline-block;z-index:200}.nav-dropdown .nav-link{display:flex;align-items:center}.dropdown-arrow{font-size:.6rem;margin-left:5px;transition:transform .3s ease}.nav-dropdown:hover .dropdown-arrow{transform:rotate(180deg)}.dropdown-content{position:absolute;top:calc(100% - 0px);left:0;background-color:rgba(255,255,255,.98);min-width:220px;box-shadow:var(--shadow-lg);border-radius:var(--radius-md);opacity:0;visibility:hidden;transform:translateY(10px);transition:all .3s cubic-bezier(.25,1,.5,1);z-index:100;overflow:hidden;padding-top:5px;border-top:2px solid var(--primary-500)}.nav-dropdown:hover .dropdown-content{opacity:1;visibility:visible;transform:translateY(0)}.nav-dropdown:after{content:"";position:absolute;height:10px;width:100%;bottom:-10px;left:0}.dropdown-item{display:flex;align-items:center;padding:12px 16px;text-decoration:none;transition:all .2s ease;position:relative;overflow:hidden}.dropdown-item:before{content:"";position:absolute;left:0;top:0;height:100%;width:3px;background-color:var(--primary-500);transform:translateX(-3px);transition:transform .2s ease}.dropdown-item:hover{background-color:var(--primary-100);color:var(--primary-700)}.dropdown-item:hover:before{transform:translateX(0)}.dropdown-item.active{background-color:var(--primary-100);color:var(--primary-700);font-weight:600}.dropdown-item .nav-icon{margin-right:10px;font-size:1.2rem}@media (max-width:1300px){.nav-dropdown{width:100%}.dropdown-content{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;background-color:transparent;max-height:0;overflow:hidden;transition:max-height .5s cubic-bezier(0,1,0,1);border-top:none;padding-top:0}.nav-dropdown.active .dropdown-content{max-height:1000px;transition:max-height 1s ease-in-out}.dropdown-item{padding-left:40px;margin:5px 0;border-radius:var(--radius-md);transform:translateX(-10px);opacity:0;transition:transform .3s ease,opacity .3s ease;transition-delay:calc(var(--item-index, 0) * .05s)}.nav-dropdown.active .dropdown-item{transform:translateX(0);opacity:1}.nav-dropdown .nav-link .dropdown-arrow{transition:transform .3s ease}.nav-dropdown.active .nav-link .dropdown-arrow{transform:rotate(180deg)}.dropdown-arrow{margin-left:auto}}