body {
    font-family: 'Poppins', sans-serif;
    background-color: #ffffff;
    margin: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main {
    flex: 1 0 auto;
}

.navbar {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.navbar-brand {
    font-weight: 600;
    font-size: 1.5rem;
}

.nav-link {
    transition: background-color 0.2s, color 0.2s;
    border-radius: 4px;
}

.nav-link:hover {
    background-color: rgba(0, 0, 0, 0.05);
    color: #007bff !important;
}

@media (max-width: 991.98px) {
    .navbar-collapse {
        background-color: #ffffff00;
        padding: 1rem;
        border-radius: 0 0 8px 8px;
        max-height: 80vh;
        overflow-y: auto;
    }
}


    .nav-link {
        padding: 0.75rem 1rem;
        font-size: 1.1rem;
    }
}

.card {
    transition: transform 0.3s, box-shadow 0.3s;
    border-radius: 12px;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1) !important;
}

.card-title {
    font-weight: 600;
    font-size: 1.25rem;
}

.card-text {
    color: #6c757d;
}

.form-control, .form-select {
    border-radius: 8px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus, .form-select:focus {
    border-color: #007bff;
    box-shadow: 0 0 0 0.25rem rgba(0, 123, 255, 0.25);
}

.input-group-text {
    background-color: #f8f9fa;
    border-radius: 8px 0 0 8px;
}

.btn-primary {
    background-color: #007bff;
    border: none;
    border-radius: 8px;
    padding: 0.75rem 1.5rem;
}

.btn-primary:hover {
    background-color: #0056b3;
}

.alert {
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.table {
    background: #ffffff;
    border-radius: 8px;
    overflow: hidden;
}

.table th {
    background-color: #f8f9fa;
}

.badge {
    font-size: 0.9rem;
    padding: 0.5em 1em;
}

footer {
    flex-shrink: 0;
    background-color: #f8f9fa;
    border-top: 1px solid #e9ecef;
}