.sortable {
    cursor: pointer;
    position: relative;
}

.arrow {
    font-size: 12px;
    opacity: 0.5;
}

.sortable.asc .arrow::after {
    content: " ↑";
    opacity: 1;
}

.sortable.desc .arrow::after {
    content: " ↓";
    opacity: 1;
}

.sortable:hover .arrow {
    opacity: 1;
}

.sidebar {
    width: 250px;
    background-color: #1a202c;
    color: white;
    padding: 20px;
    min-height: 100vh;
}

.sidebar a {
    color: white;
    text-decoration: none;
    display: block;
    padding: 10px 0;
}

.sidebar a:hover {
    color: #63b3ed;
}

.content {
    flex: 1;
    padding: 20px;
}

.active {
    color: #63b3ed;
    font-weight: bold;
}

:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --text-color: #333;
    --bg-color: #f8f9fa;
    --card-bg: #ffffff;
}

html.dark-mode {
    --primary-color: #0d6efd;
    --secondary-color: #adb5bd;
    --text-color: #e9ecef;
    --bg-color: #212529;
    --card-bg: #343a40;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: all 0.3s ease;
}

.card {
    background-color: var(--card-bg);
    border: none;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border-radius: 10px;
}

.form-control {
    border-radius: 8px;
    background-color: var(--card-bg);
    color: var(--text-color);
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

.btn-primary {
    border-radius: 8px;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
}

.toggle-mode {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
}