body {
    background-color: #f8f9fa;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}
.container {
    flex: 1;
}
.card {
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    margin-bottom: 20px;
    border: none;
}
.navbar-brand {
    font-weight: bold;
}
footer {
    margin-top: auto;
}