body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
}

header.bg-primary {
    background: linear-gradient(90deg, #007bff 60%, #0056b3 100%);
}

footer {
    font-size: 1rem;
}

.navbar-brand {
    font-weight: bold;
    letter-spacing: 1px;
}

h1, h2, h3 {
    font-weight: 700;
}

.card {
    box-shadow: 0 2px 8px rgba(0,0,0,0.07);
    border: none;
}

@media (max-width: 767.98px) {
    header.bg-primary {
        padding: 2rem 0 !important;
    }
    .navbar-nav {
        text-align: center;
    }
    .card {
        margin-bottom: 1.5rem;
    }
}