body {
    font-family: 'Arial', sans-serif;
    transition: background-color 0.3s, color 0.3s;
}

/* Light theme */
body.light-theme {
    background-color: #f0f2f5;
    color: #1c1e21;
}

body.light-theme .navbar {
    background-color: #ffffff;
    box-shadow: 0 2px 4px rgba(0,0,0,.1);
}

body.light-theme .navbar-brand,
body.light-theme .nav-link {
    color: #1877f2 !important;
}

body.light-theme .btn-outline-primary {
    color: #1877f2;
    border-color: #1877f2;
}

body.light-theme .btn-outline-primary:hover {
    background-color: #1877f2;
    color: #ffffff;
}

/* Dark theme */
body.dark-theme {
    background-color: #18191a;
    color: #e4e6eb;
}

body.dark-theme .navbar {
    background-color: #242526;
    box-shadow: 0 2px 4px rgba(255,255,255,.1);
}

body.dark-theme .navbar-brand,
body.dark-theme .nav-link {
    color: #e4e6eb !important;
}

body.dark-theme .btn-outline-primary {
    color: #e4e6eb;
    border-color: #e4e6eb;
}

body.dark-theme .btn-outline-primary:hover {
    background-color: #e4e6eb;
    color: #18191a;
}

body.dark-theme .form-control {
    background-color: #3a3b3c;
    color: #e4e6eb;
    border-color: #3a3b3c;
}

body.dark-theme .table {
    color: #e4e6eb;
    background-color: #242526;
}

body.dark-theme .table th {
    background-color: #3a3b3c;
}

body.dark-theme .pagination .page-link {
    background-color: #242526;
    color: #e4e6eb;
    border-color: #3a3b3c;
}

body.dark-theme .pagination .page-link:hover {
    background-color: #3a3b3c;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.navbar {
    background-color: #ffffff;
    box-shadow: 0 2px 4px rgba(0,0,0,.1);
    padding: 10px 0;
}

.navbar-brand, .nav-link {
    color: #1877f2 !important;
}

.navbar-nav .nav-link:hover {
    color: #1877f2 !important;
    text-decoration: underline;
}

h1, h2, h3 {
    color: #1877f2;
}

label {
    color: #1c1e21;
}

.btn-primary {
    background-color: #1877f2;
    border-color: #1877f2;
}

.btn-primary:hover {
    background-color: #166fe5;
    border-color: #166fe5;
}

.form-control {
    background-color: #ffffff;
    color: #1c1e21;
    border: 1px solid #dddfe2;
}

.table {
    color: #1c1e21;
    background-color: #ffffff;
    box-shadow: 0 2px 4px rgba(0,0,0,.1);
}

.table th {
    background-color: #f0f2f5;
    color: #1c1e21;
}

.table td, .table th {
    border-color: #dddfe2;
}

.pagination .page-link {
    background-color: #ffffff;
    color: #1877f2;
    border-color: #dddfe2;
}

.pagination .page-link:hover {
    background-color: #f0f2f5;
    color: #1877f2;
}

.pagination .page-item.active .page-link {
    background-color: #1877f2;
    border-color: #1877f2;
    color: #ffffff;
}

.card {
    background-color: #ffffff;
    border: none;
    box-shadow: 0 2px 4px rgba(0,0,0,.1);
    margin-bottom: 20px;
}

.card-header {
    background-color: #f0f2f5;
    border-bottom: 1px solid #dddfe2;
    color: #1c1e21;
}

.dropdown-menu {
    background-color: #ffffff;
    border: 1px solid #dddfe2;
    box-shadow: 0 2px 4px rgba(0,0,0,.1);
}

.dropdown-item {
    color: #1c1e21;
}

.dropdown-item:hover, .dropdown-item:focus {
    background-color: #f0f2f5;
    color: #1877f2;
}