.navbar{background:#fff;justify-content:center;gap:20px;padding:20px;display:flex;box-shadow:0 2px 5px #0000001a}.nav-link{color:#333;text-decoration:none}.nav-link.active{color:#007bff;border-bottom:2px solid #007bff;font-weight:700}.contenedor-principal{text-align:center;padding:40px;font-family:sans-serif}.titulo-grande{color:#1a1a1a;font-size:3rem}