body{background-color:#f4f6f9;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif}.navbar-custom{background:linear-gradient(135deg,#0056b3,#004494);box-shadow:0 4px 12px rgba(0,0,0,.1)}.nav-link{color:rgba(255,255,255,.9)!important;font-weight:500;padding:10px 15px!important;border-radius:8px;transition:.3s}.nav-link.active,.nav-link:hover{background:rgba(255,255,255,.2);color:white!important}.main-container{max-width:1200px;margin:30px auto;padding:0 15px;min-height:70vh}.card-custom{border:none;border-radius:12px;box-shadow:0 5px 15px rgba(0,0,0,.05)}