.header{font-family:Poppins,sans-serif;background-color:#282c34;display:flex;justify-content:space-between;align-items:center;padding:1rem 2rem;color:#fff;position:fixed;top:0;left:0;width:100%;height:80px;z-index:1000;box-sizing:border-box}.logo{margin-right:auto}.logo a{font-size:1.8rem;font-weight:600;color:#fff;text-decoration:none;transition:color .3s ease-in-out}.logo a:hover{color:#61dafb}.nav-links{display:flex;gap:2rem;font-size:1rem;align-items:center;justify-content:flex-end;margin-left:auto}.nav-links a{color:#fff;text-decoration:none;font-weight:500;padding-bottom:2px;position:relative;transition:color .3s ease-in-out}.nav-links a:hover{color:#61dafb}.nav-links a:after{content:"";position:absolute;bottom:0;left:0;width:0;height:2px;background-color:#61dafb;transition:width .3s ease-in-out}.nav-links a:hover:after{width:100%}.nav-links a.active{color:#61dafb}.nav-links a.active:after{width:100%}.mobile-menu-btn{display:none;background:none;border:none;color:#fff;font-size:2rem;cursor:pointer}@media (max-width: 768px){.nav-links{position:absolute;top:100%;left:0;right:0;flex-direction:column;background-color:#282c34;padding:1rem 2rem;display:none}.nav-links.open{display:flex}.mobile-menu-btn{display:block}}@media (max-width: 480px){.logo a{font-size:1.5rem}.nav-links{gap:1rem}}