/* Desktop Sidebar Navigation */
#desktop-nav-sidebar {
    width: 240px;
    flex-shrink: 0;
    background: var(--nav-bg);
    border-right: 1px solid var(--nav-border);
    overflow-y: auto;
    overflow-x: hidden;
    padding: 0.5rem 0 0.5rem 5px;
    transition: width 0.3s ease;
    position: relative;
    display: flex;
    flex-direction: column;
}

#desktop-nav-sidebar.collapsed {
    width: 60px;
}

/* Auto-expand khi hover vào sidebar collapsed */
#desktop-nav-sidebar.collapsed:hover {
    width: 240px;
}

#desktop-nav-sidebar.collapsed:hover .nav-group-title span,
#desktop-nav-sidebar.collapsed:hover .nav-item span {
    opacity: 1;
    width: auto;
}

#desktop-nav-sidebar.collapsed:hover .nav-group-icon {
    display: block;
}

#desktop-nav-sidebar.collapsed .nav-group-title span,
#desktop-nav-sidebar.collapsed .nav-item span {
    opacity: 0;
    width: 0;
    overflow: hidden;
}

#desktop-nav-sidebar.collapsed .nav-group-icon {
    display: none;
}

.sidebar-toggle-btn {
    position: absolute;
    top: 0.5rem;
    right: -12px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--nav-bg);
    border: 1px solid var(--nav-border);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    transition: transform 0.2s ease;
}

.sidebar-toggle-btn:hover {
    background: var(--nav-item-hover);
}

.sidebar-toggle-btn svg {
    width: 14px;
    height: 14px;
    color: var(--nav-item-color);
    transition: transform 0.3s ease;
}

#desktop-nav-sidebar.collapsed .sidebar-toggle-btn svg {
    transform: rotate(180deg);
}

.nav-groups-container {
    flex: 1;
    overflow-y: auto;
}

.nav-groups-bottom {
    margin-top: auto;
    padding-top: 0.5rem;
    border-top: 1px solid var(--nav-border);
}

.nav-group {
    margin-bottom: 0.5rem;
}

.nav-group-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--nav-group-title);
    padding: 0.5rem 1rem 0.5rem 0.5rem;
    margin-bottom: 0.25rem;
    cursor: pointer;
    -webkit-user-select: none;
    user-select: none;
}

.nav-group-title-icon {
    width: 1.125rem;
    height: 1.125rem;
    flex-shrink: 0;
}

.nav-group-title span {
    flex: 1;
    transition: opacity 0.3s ease, width 0.3s ease;
}

.nav-group-icon {
    width: 0.875rem;
    height: 0.875rem;
    flex-shrink: 0;
    color: var(--nav-group-title);
    transition: transform 0.2s ease;
    margin-left: auto;
}

.nav-group.collapsed .nav-group-icon {
    transform: rotate(-90deg);
}

.nav-group-items {
    transition: max-height 0.3s ease, opacity 0.2s ease;
    overflow: hidden;
}

.nav-group.collapsed .nav-group-items {
    max-height: 0;
    opacity: 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    width: calc(100% - 1rem);
    padding: 0.625rem 0.75rem 0.625rem 0.5rem;
    margin: 0.125rem 0.5rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--nav-item-color);
    background: transparent;
    border: none;
    border-left: 3px solid transparent;
    cursor: pointer;
    transition: all 0.15s ease;
    text-align: left;
    position: relative;
}

.nav-item span {
    transition: opacity 0.3s ease, width 0.3s ease;
    white-space: nowrap;
}

.nav-item-icon {
    width: 1.25rem;
    height: 1.25rem;
    flex-shrink: 0;
}

.nav-item:hover {
    background: var(--nav-item-hover);
    color: var(--nav-item-hover-color);
}

.nav-item.active {
    background: var(--nav-item-active-bg);
    color: var(--nav-item-active-color);
    font-weight: 600;
    border-left-color: transparent;
}

.nav-item[data-tooltip] {
    position: relative;
}

.nav-item[data-tooltip]:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    left: 100%;
    top: 50%;
    transform: translateY(-50%);
    margin-left: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: var(--tooltip-bg);
    color: var(--tooltip-color);
    border-radius: 0.375rem;
    font-size: 0.875rem;
    white-space: nowrap;
    z-index: 1000;
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    pointer-events: none;
}

/* Ẩn tooltip khi sidebar expanded hoặc đang hover (auto-expand) */
#desktop-nav-sidebar:not(.collapsed) .nav-item[data-tooltip]:hover::after,
#desktop-nav-sidebar.collapsed:hover .nav-item[data-tooltip]:hover::after {
    display: none;
}

:root {
    --nav-bg: rgb(249 250 251);
    --nav-border: rgb(229 231 235);
    --nav-group-title: rgb(107 114 128);
    --nav-item-color: rgb(55 65 81);
    --nav-item-hover: rgb(243 244 246);
    --nav-item-hover-color: rgb(17 24 39);
    --nav-item-active-bg: rgb(59 130 246);
    --nav-item-active-color: rgb(255 255 255);
    --tooltip-bg: rgb(17 24 39);
    --tooltip-color: rgb(255 255 255);
}

.dark {
    --nav-bg: rgb(17 24 39);
    --nav-border: rgb(55 65 81);
    --nav-group-title: rgb(156 163 175);
    --nav-item-color: rgb(209 213 219);
    --nav-item-hover: rgb(31 41 55);
    --nav-item-hover-color: rgb(243 244 246);
    --nav-item-active-bg: rgb(59 130 246);
    --nav-item-active-color: rgb(255 255 255);
    --tooltip-bg: rgb(55 65 81);
    --tooltip-color: rgb(243 244 246);
}

@media (max-width: 768px) {
    #desktop-nav-sidebar {
        display: none;
    }
}