:root {
    --sidebar-width: 252px;
    --sidebar-width-collapsed: 56px;
    --sidebar-header-height: 52px;
    --sidebar-bg-top: #1a1d21;
    --sidebar-bg-bottom: #121417;
    --sidebar-border: 1px solid rgba(255, 255, 255, 0.08);
    --sidebar-radius: 0.55rem;
    --sidebar-hover: rgba(255, 255, 255, 0.07);
    --sidebar-active: rgba(255, 255, 255, 0.1);
    --sidebar-muted: rgba(255, 255, 255, 0.68);
    --sidebar-rail: rgba(255, 255, 255, 0.14);
    --sidebar-accent: #f0ad4e;
    --sidebar-indent: 10px;
}

/* Shell */
.sidebar {
    width: var(--sidebar-width);
    color: #fff;
    background: linear-gradient(180deg, var(--sidebar-bg-top), var(--sidebar-bg-bottom));
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.22);
    transition: width 0.3s ease;
    z-index: 1020;
}

.sidebar.collapsed {
    width: var(--sidebar-width-collapsed);
}

.sidebar-title {
    height: var(--sidebar-header-height);
    border-bottom: var(--sidebar-border);
    background: rgba(255, 255, 255, 0.02);
    gap: 0.25rem;
}

.sidebar-brand,
.sidebar-brand:hover {
    color: #fff;
}

.sidebar-brand__version {
    margin-left: 0.15rem;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--sidebar-accent);
    vertical-align: middle;
}

.sidebar.collapsed .hide-on-collapse {
    display: none !important;
}

.toggle-sidebar {
    flex-shrink: 0;
    padding: 0.25rem;
    line-height: 1;
    color: #fff !important;
    text-decoration: none;
}

.toggle-sidebar:hover,
.toggle-sidebar:focus-visible {
    color: #fff !important;
}

.main-content {
    flex: 1 1 auto !important;
    margin-left: var(--sidebar-width);
    padding: var(--sidebar-header-height) 0;
    transition: margin-left 0.3s ease !important;
    overflow-y: auto;
}

.sidebar.collapsed ~ .main-content {
    margin-left: var(--sidebar-width-collapsed);
}

/* Nav */
.sidebar .items {
    padding: 0 0.7rem;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.22) transparent;
}

.sidebar .items::-webkit-scrollbar {
    width: 6px;
}

.sidebar .items::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.22);
    border-radius: 999px;
}

.sidebar-item {
    margin-bottom: 0.18rem;
}

.sidebar-submenu .sidebar-item--subsection,
.sidebar-submenu .sidebar-item--leaf {
    margin-left: var(--sidebar-indent);
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    width: 100%;
    padding: 0.5rem 0.7rem;
    border: 0;
    border-radius: var(--sidebar-radius);
    background: transparent;
    color: #fff;
    text-decoration: none;
    text-align: left;
    line-height: 1.2;
    cursor: pointer;
    transition: background-color 0.15s ease, color 0.15s ease;
}

.sidebar-link:hover,
.sidebar-link:focus-visible {
    background-color: var(--sidebar-hover);
    color: #fff;
}

.sidebar-link__icon {
    flex-shrink: 0;
    opacity: 0.9;
}

.sidebar-link__label {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sidebar-item--section > .sidebar-link {
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.sidebar-item--subsection > .sidebar-link {
    font-size: 0.88rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.82);
}

.sidebar-item--leaf > .sidebar-link {
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--sidebar-muted);
}

.sidebar-item--section.is-expanded > .sidebar-link,
.sidebar-item--subsection.is-expanded > .sidebar-link {
    background: rgba(255, 255, 255, 0.05);
    color: #fff;
}

.sidebar-item--leaf.is-selected > .sidebar-link {
    background-color: var(--sidebar-active);
    color: #fff;
    font-weight: 600;
}

.sidebar-section-chevron {
    flex-shrink: 0;
    opacity: 0.55;
    transition: transform 0.2s ease, opacity 0.15s ease;
}

.sidebar-section-toggle:hover .sidebar-section-chevron,
.sidebar-section-toggle[aria-expanded="true"] .sidebar-section-chevron {
    opacity: 0.9;
}

.sidebar-section-toggle[aria-expanded="true"] .sidebar-section-chevron {
    transform: rotate(180deg);
}

.sidebar-submenu {
    margin: 0.25rem 0 0.3rem 0.4rem;
    padding: 0.2rem 0;
    border-left: 1px solid var(--sidebar-rail);
}

/* Collapsed */
.sidebar.collapsed .sidebar-submenu,
.sidebar.collapsed .profile-section {
    display: none !important;
}

.sidebar.collapsed .items {
    padding: 0 0.25rem;
}

.sidebar.collapsed .sidebar-title,
.sidebar.collapsed .sidebar-link {
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar.collapsed .sidebar-title {
    padding-left: 0 !important;
    padding-right: 0 !important;
}

.sidebar.collapsed .sidebar-brand {
    display: none !important;
}

.sidebar.collapsed .toggle-sidebar {
    margin-left: 0 !important;
}

.sidebar.collapsed .sidebar-link {
    gap: 0;
    padding: 0.55rem 0;
}

/* Profile */
.profile-section {
    border-top: var(--sidebar-border);
    background: rgba(0, 0, 0, 0.18);
}

.sidebar-profile-avatar {
    width: 2rem;
    height: 2rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #fff;
}

.sidebar-profile-label {
    margin-bottom: 0.1rem;
    font-size: 0.68rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--sidebar-muted);
}

.sidebar-profile-link,
.sidebar-logout {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    width: 100%;
    padding: 0.45rem 0.7rem;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: var(--sidebar-radius);
    background: transparent;
    color: rgba(255, 255, 255, 0.88);
    font-size: 0.85rem;
    text-decoration: none;
    white-space: nowrap;
    transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.sidebar-profile-link:hover,
.sidebar-profile-link:focus-visible,
.sidebar-profile-link.is-selected {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.28);
    color: #fff;
}

.sidebar-logout:hover,
.sidebar-logout:focus-visible {
    background: rgba(220, 53, 69, 0.16);
    border-color: rgba(220, 53, 69, 0.45);
    color: #fff;
}