.app {
    display: flex;
    height: 100%;
    overflow: hidden;
}

.sidebar {
    position: relative;
    z-index: 40;
    flex: 0 0 var(--sidebar-width);
    width: var(--sidebar-width);
    height: 100%;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    background: var(--color-primary);
    color: #e8f2f8;
    transition: flex-basis var(--ease), width var(--ease);
}

.sidebar-top {
    display: flex;
    align-items: center;
    min-height: 2.5rem;
    padding: 0.35rem 0.4rem;
}

.sidebar-toggle {
    flex: 0 0 30px;
    width: 30px;
    height: 30px;
    display: grid;
    place-items: center;
    border: 0;
    background: transparent;
    color: #f4fbff;
    cursor: pointer;
}

.sidebar-toggle:hover,
.sidebar-toggle:focus-visible {
    background: color-mix(in srgb, var(--color-secondary) 22%, transparent);
}

.sidebar-toggle svg {
    width: 14px;
    height: 14px;
    display: block;
}

.sidebar-toggle .icon-expand {
    display: none;
}

.sidebar-nav {
    flex: 1 1 auto;
    overflow-x: hidden;
    overflow-y: auto;
    padding: 0.25rem 0.75rem 1.25rem;
}

.nav-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-item + .nav-item {
    margin-top: 0.1rem;
}

.nav-item .nav-list {
    margin-left: 0.85rem;
    padding-left: 0.65rem;
    border-left: 1px solid color-mix(in srgb, var(--color-secondary) 28%, transparent);
}

/* Sidebar-specific hierarchical navigation styles */
.sidebar .nav-toggle {
    color: #fff;
}

.sidebar .nav-toggle:hover {
    background-color: color-mix(in srgb, var(--color-secondary) 22%, transparent);
}

.sidebar .nav-sub-toggle {
    color: #e8f2f8;
}

.sidebar .nav-sub-toggle:hover {
    background-color: color-mix(in srgb, var(--color-secondary) 22%, transparent);
}

.nav-muted-text {
    color: #a8b8c8;
    font-style: italic;
    padding: 0.5rem 0.75rem;
    display: block;
}

/* Sidebar-specific nav-link styles to override components.css */
.sidebar .nav-link {
    display: block;
    padding: 0.45rem 0.35rem;
    color: #fff !important;
    text-decoration: none;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar .nav-link:hover {
    color: #fff !important;
}

.sidebar .nav-link[aria-current="page"] {
    color: #fff !important;
    box-shadow: inset 3px 0 0 var(--color-accent);
    padding-left: calc(0.35rem + 3px);
}

.main-column {
    flex: 1 1 auto;
    min-width: 0;
    height: 100%;
    overflow-x: hidden;
    overflow-y: auto;
    background: var(--color-paper);
}

.page-shell {
    width: min(100%, 78rem);
    margin: 0 auto;
    padding: var(--content-pad);
}

.nav-overlay {
    display: none;
}

html[data-sidebar="collapsed"] .sidebar-top {
    justify-content: center;
    padding-left: 0;
    padding-right: 0;
}

html[data-sidebar="collapsed"] .sidebar-toggle .icon-collapse {
    display: none;
}

html[data-sidebar="collapsed"] .sidebar-toggle .icon-expand {
    display: block;
}

html[data-sidebar="collapsed"] .sidebar-nav {
    display: none;
}

@media (max-width: 64rem) {
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        flex-basis: 0;
        width: var(--sidebar-mobile);
        max-width: 22.5rem;
        height: 100dvh;
        transform: translateX(-105%);
        transition: transform var(--ease);
    }

    html[data-sidebar="expanded"] .sidebar {
        transform: translateX(0);
    }

    html[data-sidebar="expanded"] .sidebar-nav {
        display: block;
    }

    .nav-overlay {
        display: block;
        position: fixed;
        inset: 0;
        z-index: 30;
        border: 0;
        padding: 0;
        margin: 0;
        background: rgba(4, 10, 18, 0.55);
        opacity: 0;
        pointer-events: none;
        transition: opacity var(--ease);
    }

    html[data-sidebar="expanded"] .nav-overlay {
        opacity: 1;
        pointer-events: auto;
        cursor: pointer;
    }
}