.sidebar {
    width: 250px;
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    transition: all 0.3s;
}

.dark .sidebar {
    background-color: #2d2d2d;
    border-right: 1px solid #404040;
}

.light .sidebar {
    background-color: #ffffff;
    border-right: 1px solid #e5e5e5;
}

.nav-item {
    padding: 0.75rem 1rem;
    margin: 0.25rem 0;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

.nav-item:hover {
    background-color: rgba(0, 123, 255, 0.1);
}

.nav-item.active {
    background-color: #007bff;
    color: white;
}