.sidebar-collapsed {
    width: 4rem;
}

.sidebar-expanded {
    width: 16rem;
}

.transition-width {
    transition: width 0.3s ease;
}

/* Tooltip */
.tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    left: 100%;
    top: 50%;
    transform: translateY(-50%);
    background-color: #1e40af;
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
    margin-left: 0.5rem;
    font-size: 0.75rem;
    z-index: 10;
}

.sidebar-collapsed .tooltip:hover::after {
    opacity: 1;
}

.icon {
    width: 1.5rem;
    height: 1.5rem;
}