:root{--nav-height:80px;--primary-color:#007bff;--text-dark:#333;--bg-white:rgba(255,255,255,.95)}.main-header{position:fixed;top:0;left:0;width:100%;height:var(--nav-height);background:var(--bg-white);backdrop-filter:blur(10px);box-shadow:0 2px 10px rgba(0,0,0,.05);z-index:1000;display:flex;align-items:center}.header-container{max-width:1200px;width:100%;margin:0 auto;padding:0 20px}.navbar{display:flex;align-items:center;justify-content:space-between}.navbar-brand img{height:40px;width:auto;display:block}.nav-content{display:flex;align-items:center;gap:30px}.header-actions{display:flex;align-items:center;gap:15px}.btn-login{text-decoration:none;color:var(--text-dark);font-weight:500;padding:8px 16px}.btn-register{text-decoration:none;background:var(--primary-color);color:#fff;padding:10px 20px;border-radius:50px;font-weight:600;transition:transform .2s,background .2s}.btn-register:hover{background:#0056b3;transform:translateY(-1px)}.mobile-only{display:none}.menu-toggle{display:none;background:none;border:0;cursor:pointer;padding:10px}.burger-icon,.burger-icon::before,.burger-icon::after{content:'';display:block;width:25px;height:2px;background:var(--text-dark);transition:all .3s}.burger-icon::before{transform:translateY(-8px)}.burger-icon::after{transform:translateY(6px)}@media(max-width:991px){.menu-toggle{display:block}.nav-content{position:absolute;top:var(--nav-height);left:0;width:100%;background:#fff;flex-direction:column;padding:20px;gap:20px;box-shadow:0 10px 15px rgba(0,0,0,.1);display:none}.nav-content.is-open{display:flex}.desktop-only{display:none}.mobile-only{display:flex;gap:10px}.app-mini-link img{height:35px}}