* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    background-color: #f3f4f6;
}

.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    overflow-y: auto;
}

.main-content {
    margin-left: 250px;
    padding: 20px;
}

.nav-link {
    padding: 10px 15px;
    margin-bottom: 5px;
    border-radius: 5px;
    transition: background-color 0.3s;
}

.nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.card {
    border-radius: 10px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

.stat-card {
    padding: 20px;
    border-radius: 10px;
    color: white;
    margin-bottom: 20px;
}

.stat-card h3 {
    font-size: 2rem;
    margin-bottom: 10px;
}

.stat-card p {
    font-size: 1rem;
    opacity: 0.9;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
}

.table-responsive {
    overflow-x: auto;
}

.modal-backdrop {
    background-color: rgba(0, 0, 0, 0.5);
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(59, 130, 246, 0.25);
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .main-content {
        margin-left: 0;
    }
}