/* Light Theme (default) */
[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --border-color: #dee2e6;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #212529;
    --bg-secondary: #343a40;
    --text-primary: #f8f9fa;
    --text-secondary: #adb5bd;
    --border-color: #495057;
}

/* Theme Specific Styles */
[data-theme="dark"] body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

[data-theme="dark"] .navbar,
[data-theme="dark"] .sidebar-heading,
[data-theme="dark"] #sidebar-wrapper {
    background-color: var(--bg-secondary) !important;
    border-color: var(--border-color) !important;
}

[data-theme="dark"] .list-group-item {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

[data-theme="dark"] .list-group-item:hover {
    background-color: var(--bg-primary);
}

[data-theme="dark"] .card {
    background-color: var(--bg-secondary);
    border-color: var(--border-color);
}

[data-theme="dark"] .dropdown-menu {
    background-color: var(--bg-secondary);
    border-color: var(--border-color);
}

[data-theme="dark"] .dropdown-item {
    color: var(--text-primary);
}

[data-theme="dark"] .dropdown-item:hover {
    background-color: var(--bg-primary);
}

[data-theme="dark"] .message.received {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

[data-theme="dark"] .form-control {
    background-color: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .form-control:focus {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

[data-theme="dark"] .table {
    color: var(--text-primary);
}

[data-theme="dark"] .table td,
[data-theme="dark"] .table th {
    border-color: var(--border-color);
}