body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #333;
    margin: 0;
    padding: 0;
}
.container {
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    padding: 20px;
    margin-top: 50px;
}
.navbar {
    background-color: #343a40;
    border-radius: 0 0 10px 10px;
}
.navbar-brand, .navbar-nav .nav-link {
    color: white !important;
}
.btn-primary {
    background-color: #667eea;
    border-color: #667eea;
}
.btn-primary:hover {
    background-color: #5a6fd8;
}
.form-control {
    border-radius: 5px;
}
.card {
    border: none;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}