body {
    background-color: #f4f6f9;
}
.app-navbar {
    background-color: #1f2937;
}
.card-stat {
    border: none;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}
.card-stat .icon {
    font-size: 2rem;
    opacity: 0.85;
}
.table-card {
    border: none;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}
.login-box {
    max-width: 380px;
    margin: 10vh auto;
}