/* One sidebar layout for every palette. Colors follow mdBook's sidebar tokens. */
.sidebar .sidebar-scrollbox {
    padding: 14px 12px 24px;
    scroll-padding-block: 20px;
}

.chapter.sidebar-cards {
    --sidebar-card-bg: color-mix(in srgb, var(--sidebar-bg) 91%, var(--sidebar-fg));
    --sidebar-card-border: color-mix(in srgb, var(--sidebar-bg) 76%, var(--sidebar-fg));
    --sidebar-card-header-bg: color-mix(in srgb, var(--sidebar-bg) 85%, var(--sidebar-fg));
    --sidebar-card-hover: color-mix(in srgb, var(--sidebar-bg) 80%, var(--sidebar-fg));
    --sidebar-card-fg: var(--sidebar-fg);
    --sidebar-card-active-bg: color-mix(in srgb, var(--sidebar-card-bg) 90%, var(--sidebar-active));
    --sidebar-card-active-fg: var(--sidebar-card-fg);
    --sidebar-card-guide: color-mix(in srgb, var(--sidebar-bg) 65%, var(--sidebar-fg));
    margin: 0;
    padding: 0;
    font-size: 1.4rem;
    line-height: 1.5;
}

/* Stronger surfaces need stronger text too. Stretch the theme's own foreground
   away from mid-gray, keeping light text light and dark text dark (including
   themes such as Rust whose sidebar is darker than the article). */
@supports (color: rgb(from black r g b)) {
    .chapter.sidebar-cards {
        --sidebar-card-fg: rgb(from var(--sidebar-fg)
            calc(r * 1.4 - 51.2) calc(g * 1.4 - 51.2) calc(b * 1.4 - 51.2));
    }
}

.sidebar-cards .sidebar-card {
    box-sizing: border-box;
    margin-block: 0 8px;
    border: 1px solid var(--sidebar-card-border);
    border-radius: 12px;
    background: var(--sidebar-card-bg);
    color: var(--sidebar-card-fg);
}

.sidebar-cards .sidebar-group-toggle {
    appearance: none;
    display: flex;
    align-items: flex-start;
    gap: 9px;
    box-sizing: border-box;
    width: 100%;
    min-height: 44px;
    margin: 0;
    padding: 11px 12px;
    border: 0;
    border-radius: 11px;
    background: var(--sidebar-card-header-bg);
    color: var(--sidebar-card-fg);
    font: inherit;
    font-size: 1.6rem;
    font-weight: 700;
    line-height: 1.35;
    text-align: start;
    cursor: pointer;
    transition: background-color 150ms ease;
}

.sidebar-cards .sidebar-group-toggle[aria-expanded="true"] {
    border-bottom: 1px solid var(--sidebar-card-border);
    border-radius: 11px 11px 0 0;
}

.sidebar-cards .sidebar-group-label,
.sidebar-cards .sidebar-entry-label {
    flex: 1;
    min-width: 0;
    white-space: normal;
    overflow-wrap: anywhere;
    word-break: normal;
}

.sidebar-cards .sidebar-icon,
.sidebar-cards .sidebar-chevron {
    display: inline-flex;
    flex: 0 0 16px;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 21px;
    color: inherit;
}

.sidebar-cards .sidebar-icon svg,
.sidebar-cards .sidebar-chevron svg,
.sidebar-cards .chapter-fold-toggle svg {
    display: block;
    width: 16px;
    height: 16px;
    color: inherit;
    stroke: currentColor;
}

.sidebar-cards .sidebar-chevron {
    margin-inline-start: auto;
    opacity: .65;
    transition: transform 150ms ease;
}

.sidebar-cards .sidebar-group-toggle[aria-expanded="true"] .sidebar-chevron {
    transform: rotate(90deg);
}

.sidebar-cards .sidebar-group-items {
    list-style: none;
    margin: 0;
    padding: 5px 6px 7px;
}

.sidebar-cards .sidebar-group-items[hidden] {
    display: none;
}

.sidebar-cards li.chapter-item,
.sidebar-cards li.header-item {
    min-width: 0;
    margin-block: 2px 0;
    line-height: 1.5;
}

.sidebar-cards li.sidebar-entry {
    margin-block: 0 8px;
    padding: 3px;
}

.sidebar-cards .chapter-link-wrapper {
    align-items: stretch;
    min-width: 0;
}

.sidebar-cards li a {
    display: block;
    flex: 1;
    min-width: 0;
    box-sizing: border-box;
    padding: 7px 10px;
    border-radius: 7px;
    color: var(--sidebar-card-fg);
    font-weight: 400;
    white-space: normal;
    overflow-wrap: anywhere;
    word-break: normal;
    text-decoration: none;
    transition: color 150ms ease, background-color 150ms ease;
}

.sidebar-cards .sidebar-entry > .chapter-link-wrapper > a {
    display: flex;
    align-items: flex-start;
    gap: 9px;
    padding: 8px;
    font-weight: 500;
}

/* A modest inset establishes the group hierarchy without narrowing its trees. */
.sidebar-cards .sidebar-group-items > .chapter-item > .chapter-link-wrapper > a {
    padding-inline-start: 16px;
}

.sidebar-cards .sidebar-group-toggle:hover,
.sidebar-cards li a:hover,
.sidebar-cards .chapter-fold-toggle:hover {
    background: var(--sidebar-card-hover);
    color: var(--sidebar-card-fg);
}

.sidebar-cards li a.active,
.sidebar-cards li a.current-header {
    background: var(--sidebar-card-active-bg);
    color: var(--sidebar-card-active-fg);
    box-shadow: inset 2px 0 0 var(--sidebar-active);
}

.sidebar-cards li a.active,
.sidebar-cards .sidebar-entry > .chapter-link-wrapper > a.active {
    font-weight: 600;
}

[dir="rtl"] .sidebar-cards li a.active,
[dir="rtl"] .sidebar-cards li a.current-header {
    box-shadow: inset -2px 0 0 var(--sidebar-active);
}

.sidebar-cards .chapter-fold-toggle {
    display: inline-flex;
    flex: 0 0 30px;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    min-height: 35px;
    margin: 0;
    padding: 0;
    border: 0;
    border-radius: 7px;
    background: transparent;
    color: var(--sidebar-card-fg);
    font: inherit;
    opacity: .75;
    cursor: pointer;
}

.sidebar-cards .chapter-fold-toggle div {
    transition: transform 150ms ease;
}

.sidebar-cards .section {
    margin-block: 3px;
    padding-inline-start: 14px;
    line-height: 1.5;
}

/* Heading trees remain in the sidebar's single scroll container. */
.sidebar-cards .on-this-page {
    margin: 5px 4px 8px 12px;
    border-inline-start: 2px solid var(--sidebar-card-guide);
    padding-inline: 7px 0;
    font-size: 1.3rem;
}

[dir="rtl"] .sidebar-cards .on-this-page {
    margin-inline: 12px 4px;
}

.sidebar-cards .on-this-page > ol {
    margin: 0;
    padding: 0;
}

.sidebar-cards .on-this-page a {
    padding: 5px 8px;
}

.sidebar-cards .on-this-page .section {
    padding-inline-start: 12px;
}

.sidebar-cards :is(a, button, .chapter-fold-toggle):focus-visible {
    outline: 2px solid var(--sidebar-active);
    outline-offset: 2px;
}

@media (pointer: coarse) {
    .sidebar-cards .sidebar-group-toggle,
    .sidebar-cards li a,
    .sidebar-cards .chapter-fold-toggle {
        min-height: 44px;
    }

    .sidebar-cards li a,
    .sidebar-cards .on-this-page a,
    .sidebar-cards .sidebar-entry > .chapter-link-wrapper > a {
        padding-block: 11px;
    }

    .sidebar-cards .chapter-fold-toggle {
        flex-basis: 40px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .sidebar-cards *,
    html:not(.sidebar-resizing) .sidebar {
        transition: none;
        scroll-behavior: auto;
    }
}