body{font-family:Arial,sans-serif;margin:0;padding:0;background-color:#f4f4f9;color:#333}h2{text-align:center;margin-top:50px}nav{display:flex;justify-content:center;align-items:center;background-color:#0078d4;padding:15px;box-shadow:0 4px 6px #0000001a}nav a{text-decoration:none;color:#fff;margin:0 15px;font-size:18px;font-weight:700;transition:color .3s}nav a:hover{color:gold}nav a.active{text-decoration:underline;color:gold}.loading{display:flex;justify-content:center;align-items:center;height:80vh;font-size:20px;color:#555}.page-container{text-align:center;margin-top:50px;padding:20px;background-color:#fff;box-shadow:0 2px 4px #0000001a;border-radius:8px;max-width:600px;margin-left:auto;margin-right:auto}