body.dark {
    background-color: #121212;
    color: #e0e0e0;
}

body.dark .card {
    background-color: #1f1f1f;
    border-color: #444;
    color: #fff;
}

body.dark .table {
    background-color: #1f1f1f;
    color: #fff;
}

body.dark .navbar-dark .nav-link {
    color: #ddd;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f4f6f9;
    margin: 0;
    padding: 0;
    color: #333;
}

.container {
    max-width: 1100px;
    margin: auto;
}

.card {
    background: #fff;
    border-radius: 10px;
    border: 1px solid #ddd;
    padding: 30px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

h1, h2, h3, h4 {
    color: #0d6efd;
}

.navbar {
    background-color: #0d6efd;
}

.navbar a {
    color: white !important;
    font-weight: 500;
}

.btn {
    border-radius: 50px;
    padding: 8px 20px;
    font-weight: 500;
}

.btn-primary {
    background-color: #0d6efd;
    border: none;
}

.btn-primary:hover {
    background-color: #0b5ed7;
}

.btn-outline-primary {
    border-color: #0d6efd;
    color: #0d6efd;
}

.btn-outline-primary:hover {
    background-color: #0d6efd;
    color: #fff;
}

.table {
    background-color: #fff;
    border-radius: 10px;
    overflow: hidden;
}

.table th {
    background-color: #e9ecef;
    color: #333;
    font-weight: 600;
}

input.form-control, select.form-select, textarea.form-control {
    border-radius: 6px;
    border: 1px solid #ccc;
}

.alert-success {
    background-color: #d1e7dd;
    color: #0f5132;
    border: 1px solid #badbcc;
    border-radius: 6px;
    padding: 10px;
}