:root {
    color-scheme: light;
    --bg: #f7f8fb;
    --surface: #ffffff;
    --text: #17202a;
    --muted: #667085;
    --border: #d8dee8;
    --accent: #0f6bff;
    --accent-soft: #e7f0ff;
    --hover-overlay: rgba(0, 0, 0, 0.05);
    --code-bg: #f8f8f8;
    --code-text: #1f2328;
    --code-keyword: #9b2393;
    --code-type: #703daa;
    --code-string: #c41a16;
    --code-number: #1c00cf;
    --code-comment: #536579;
    --code-member: #326d74;
    --code-symbol: #643820;
    --warning: #b45309;
    --important: #b42318;
    --tip: #047857;
}

[data-theme="dark"] {
    color-scheme: dark;
    --bg: #111318;
    --surface: #181c24;
    --text: #edf2f7;
    --muted: #a9b4c4;
    --border: #303846;
    --accent: #72a7ff;
    --accent-soft: #172a4a;
    --hover-overlay: rgba(255, 255, 255, 0.05);
    --code-bg: #1f1f24;
    --code-text: #f2f2f7;
    --code-keyword: #ff7ab2;
    --code-type: #dabaff;
    --code-string: #ff8170;
    --code-number: #d9c97c;
    --code-comment: #7f8c98;
    --code-member: #78c2b3;
    --code-symbol: #ffa14f;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a { color: inherit; }

.skip-link {
    position: absolute;
    top: -48px;
    left: 12px;
    padding: 8px 12px;
    background: var(--surface);
    border: 1px solid var(--border);
    z-index: 20;
}

.skip-link:focus { top: 12px; }

html[data-lang="en"] [data-lang="vi"] { display: none !important; }
html[data-lang="vi"] [data-lang="en"] { display: none !important; }

.topbar {
    position: sticky;
    top: 0;
    z-index: 10;
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: 16px;
    align-items: center;
    min-height: 64px;
    padding: 10px 20px;
    background: color-mix(in srgb, var(--surface) 94%, transparent);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(16px);
}

.topbar span, .breadcrumb, .lead, .sidebar, td { color: var(--muted); }

.icon-button, .back-to-top, .copy-button, [role="tab"] {
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text);
    border-radius: 8px;
    min-height: 36px;
    padding: 6px 10px;
    cursor: pointer;
}

.logo-button {
    display: none;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border: 0;
    background: transparent;
    border-radius: 8px;
    cursor: pointer;
    padding: 0;
}

.logo-button img {
    display: block;
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.icon-button:focus-visible, .logo-button:focus-visible, .back-to-top:focus-visible, .copy-button:focus-visible, .locale__button:focus-visible, .locale__item:focus-visible, input:focus-visible, a:focus-visible, [role="tab"]:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--accent) 40%, transparent);
    outline-offset: 2px;
}

/* Search trigger button */
.ds-button {
    display: flex;
    align-items: center;
    gap: 8px;
    height: 38px;
    padding: 0 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface);
    color: var(--muted);
    cursor: pointer;
    font-size: 0.92rem;
    font-family: inherit;
    white-space: nowrap;
}

.ds-button:hover {
    border-color: var(--accent);
    color: var(--text);
}

.ds-button kbd {
    background: color-mix(in srgb, var(--surface) 86%, var(--bg));
    border: 1px solid var(--border);
    box-shadow: none;
    color: var(--muted);
    border-radius: 4px;
    font-family: ui-monospace, SFMono-Regular, monospace;
    font-size: 0.72rem;
    padding: 1px 5px;
}

.ds-keys {
    display: flex;
    gap: 3px;
}

.locale {
    position: relative;
}

.locale__button {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    min-height: 38px;
    padding: 0 10px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface);
    color: var(--text);
    cursor: pointer;
    font: inherit;
    white-space: nowrap;
}

.locale__icon {
    display: block;
    width: 16px;
    height: 16px;
    color: var(--muted);
    flex: 0 0 auto;
}

.locale__label {
    color: var(--text);
    font-size: 0.92rem;
    font-weight: 500;
}

.locale__caret {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 14px;
    height: 14px;
    flex: 0 0 14px;
    color: var(--muted);
    font-size: 0;
    line-height: 0;
    transition: transform 0.16s ease;
}

.locale__caret::before {
    content: "";
    width: 6px;
    height: 6px;
    border-right: 1.6px solid currentColor;
    border-bottom: 1.6px solid currentColor;
    transform: rotate(45deg) translate(-1px, -1px);
    transform-origin: center;
}

.locale.open .locale__caret {
    transform: rotate(180deg);
}

.locale__menu {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    z-index: 30;
    display: none;
    min-width: 150px;
    padding: 6px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface);
    box-shadow: 0 12px 28px color-mix(in srgb, #000000 18%, transparent);
}

.locale.open .locale__menu {
    display: block;
}

.locale__item {
    display: block;
    width: 100%;
    padding: 8px 10px;
    border: 0;
    border-radius: 6px;
    background: transparent;
    color: var(--text);
    cursor: pointer;
    font: inherit;
    text-align: left;
}

.locale__item:hover,
.locale__item[aria-current="true"] {
    color: var(--accent);
    background: var(--accent-soft);
}

.layout {
    display: grid;
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 0;
    align-items: start;
    max-width: none;
    margin: 0;
    padding: 0;
}

.layout > .sidebar {
    grid-column: 1;
}

.layout > .content {
    grid-column: 2;
    padding: 24px 32px 48px;
}

.sidebar {
    position: sticky;
    top: 64px;
    width: 300px;
    min-width: 0;
    height: calc(100vh - 64px);
    overflow: auto;
    background: var(--surface);
    border-right: 1px solid var(--border);
    scrollbar-width: thin;
}

.sidebar nav {
    display: flex;
    flex-direction: column;
    gap: 4px;
    width: 100%;
    margin: 0;
    padding: 8px 12px 32px;
}

.doc-menu {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.menu-section {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.menu-section + .menu-section {
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px solid var(--border);
}

.menu-section__toggle {
    display: flex;
    align-items: center;
    gap: 6px;
    width: 100%;
    min-height: 32px;
    margin: 12px 0 2px;
    padding: 6px 12px;
    border: 0;
    border-radius: 4px;
    background: transparent;
    color: var(--muted);
    cursor: pointer;
    font-family: inherit;
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-align: left;
    text-transform: uppercase;
    user-select: none;
}

.menu-section:first-child .menu-section__toggle {
    margin-top: 0;
}

.menu-section__toggle::before {
    content: none;
}

.menu-section__toggle::after {
    content: "";
    display: inline-flex;
    width: 7px;
    height: 7px;
    flex: 0 0 7px;
    margin-left: auto;
    border-right: 1.4px solid currentColor;
    border-bottom: 1.4px solid currentColor;
    transform: rotate(45deg) translate(-1px, -1px);
    transform-origin: center;
    transition: transform 0.18s ease;
}

.menu-section__toggle:hover {
    color: var(--text);
    background: var(--hover-overlay);
}

.menu-section.is-collapsed > .menu-section__toggle::after {
    transform: rotate(-45deg) translate(-1px, -1px);
}

.menu-section.is-collapsed > .menu-section__body {
    display: none;
}

.menu-section__body {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.menu-group {
    display: flex;
    flex-direction: column;
    gap: 0;
    min-width: 0;
}

.menu-group__row {
    display: flex;
    align-items: center;
    gap: 2px;
    border-radius: 4px;
    min-width: 0;
}

.menu-group.active-parent > .menu-group__row {
    background: var(--hover-overlay);
}

.menu-group__link,
.menu-item {
    display: block;
    min-width: 0;
    border-radius: 4px;
    text-decoration: none;
}

.menu-group__link {
    flex: 1 1 auto;
    overflow: hidden;
    padding: 6px 12px;
    color: var(--muted);
    font-size: 0.9375rem;
    font-weight: 600;
    line-height: 1.25;
    text-overflow: ellipsis;
}

.menu-group__toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 30px;
    width: 30px;
    height: 30px;
    border: 0;
    border-radius: 4px;
    background: transparent;
    color: var(--muted);
    cursor: pointer;
    font-size: 0;
    line-height: 0;
    transition: color 0.18s ease, background 0.18s ease;
}

.menu-group__toggle::before {
    content: "";
    width: 7px;
    height: 7px;
    border-right: 1.6px solid currentColor;
    border-bottom: 1.6px solid currentColor;
    transform: rotate(45deg) translate(-1px, -1px);
    transform-origin: center;
    transition: transform 0.18s ease;
}

.menu-group__toggle:hover {
    color: var(--text);
    background: var(--hover-overlay);
}

.menu-group.is-collapsed .menu-group__toggle::before {
    transform: rotate(-45deg) translate(-1px, -1px);
}

.menu-group.is-collapsed > .menu-group__body {
    display: none;
}

.menu-group__body {
    display: flex;
    flex-direction: column;
    gap: 0;
    width: calc(100% - 18px);
    margin: 0 0 4px 18px;
    padding-left: 10px;
    border-left: 1px solid var(--border);
}

.menu-item {
    padding: 6px 12px;
    color: var(--muted);
    font-size: 0.9375rem;
    font-weight: 400;
    line-height: 1.25;
}

.sidebar a:hover {
    color: var(--text);
    background: var(--hover-overlay);
}

.submenu-section {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.submenu-section summary {
    margin: 10px 8px 2px;
    color: var(--muted);
    cursor: pointer;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    list-style: none;
    text-transform: uppercase;
}

.submenu-section:first-child summary {
    margin-top: 2px;
}

.submenu-section summary::-webkit-details-marker {
    display: none;
}

.submenu-section summary::before {
    content: "⌄";
    display: inline-block;
    margin-right: 5px;
    transition: transform 0.18s ease;
}

.submenu-section:not([open]) summary::before {
    transform: rotate(-90deg);
}

.submenu-section-links {
    display: flex;
    flex-direction: column;
    gap: 2px;
    margin-left: 8px;
    padding-left: 8px;
    border-left: 1px solid var(--border);
}

.sidebar a.active {
    color: var(--accent);
    background: var(--hover-overlay);
    font-weight: 600;
}

.content {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 220px;
    column-gap: 24px;
    row-gap: 0;
    min-width: 0;
    width: 100%;
    max-width: none;
}

.content > .breadcrumbs,
.content > .doc-section,
.content > .pagination-nav,
.content > .page-footer {
    grid-column: 1;
}

.breadcrumbs {
    display: flex;
    align-items: center;
    gap: 8px;
    min-height: 32px;
    margin: 0 0 4px;
    overflow-x: auto;
    scroll-margin-top: 88px;
    scrollbar-width: none;
    color: var(--muted);
    font-size: 0.9rem;
}

.breadcrumbs::-webkit-scrollbar {
    display: none;
}

.breadcrumbs__link,
.breadcrumbs__current {
    display: inline-flex;
    align-items: center;
    min-height: 28px;
    border-radius: 8px;
    text-decoration: none;
    white-space: nowrap;
}

.breadcrumbs__link {
    color: var(--muted);
}

.breadcrumbs__link:hover {
    color: var(--text);
    background: transparent;
}

.breadcrumbs__home {
    justify-content: center;
    width: 28px;
}

.breadcrumbs__home svg {
    width: 15px;
    height: 15px;
}

.breadcrumbs__separator {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 12px;
    height: 12px;
    color: var(--muted);
    opacity: 0.85;
}

.breadcrumbs__separator::before {
    content: "";
    width: 5px;
    height: 5px;
    border-right: 1.4px solid currentColor;
    border-bottom: 1.4px solid currentColor;
    transform: rotate(-45deg);
}

.breadcrumbs__current {
    padding: 4px 10px;
    color: var(--text);
    background: var(--accent-soft);
}

.doc-section {
    padding: 0 0 36px;
    scroll-margin-top: 88px;
}

.doc-section[hidden] {
    display: none;
}

.page-footer {
    grid-column: 1;
    margin: 24px 0 4px;
    padding-top: 18px;
    border-top: 1px solid var(--border);
    color: var(--muted);
    font-size: 0.95rem;
    text-align: center;
}

.pagination-nav {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    margin: 8px 0 24px;
}

.pagination-nav__link {
    display: flex;
    flex-direction: column;
    gap: 3px;
    min-height: 72px;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface);
    color: var(--text);
    text-decoration: none;
}

.pagination-nav__link:hover {
    border-color: color-mix(in srgb, var(--accent) 48%, var(--border));
    background: var(--accent-soft);
}

.pagination-nav__link--next {
    align-items: flex-end;
    text-align: right;
}

.pagination-nav__sublabel {
    color: var(--muted);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.pagination-nav__label {
    font-size: 0.96rem;
    font-weight: 600;
    line-height: 1.35;
}

h1, h2, h3 {
    line-height: 1.2;
    letter-spacing: 0;
    scroll-margin-top: 88px;
}

h1 { font-size: 42px; margin: 14px 0 12px; }
h2 { font-size: 28px; margin: 28px 0 12px; }
h3 { font-size: 20px; margin: 24px 0 8px; }

.anchor {
    color: var(--accent);
    text-decoration: none;
    margin-left: 8px;
    opacity: 0;
}

h1:hover .anchor, h2:hover .anchor, h3:hover .anchor { opacity: 1; }

table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
    background: var(--surface);
    border: 1px solid var(--border);
}

th, td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    text-align: left;
    vertical-align: top;
}

th {
    color: var(--text);
    background: color-mix(in srgb, var(--surface) 85%, var(--accent-soft));
}

pre {
    position: relative;
    overflow: auto;
    padding: 18px 52px 18px 18px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--code-bg);
    color: var(--code-text);
    box-shadow: inset 0 1px 0 color-mix(in srgb, #ffffff 60%, transparent);
}

code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.92rem;
}

pre code {
    display: block;
    white-space: pre;
    tab-size: 4;
}

.code-keyword { color: var(--code-keyword); }
.code-type { color: var(--code-type); }
.code-string { color: var(--code-string); }
.code-number { color: var(--code-number); }
.code-comment { color: var(--code-comment); font-style: italic; }
.code-member { color: var(--code-member); }
.code-symbol { color: var(--code-symbol); }

.copy-button {
    position: absolute;
    top: 8px;
    right: 8px;
    background: color-mix(in srgb, var(--surface) 86%, var(--code-bg));
    color: var(--text);
}

.callout {
    border-left: 4px solid var(--accent);
    background: var(--surface);
    padding: 12px 16px;
    margin: 16px 0;
    border-radius: 8px;
}

.callout p { margin: 4px 0 0; }
.callout.warning { border-color: var(--warning); }
.callout.important { border-color: var(--important); }
.callout.tip { border-color: var(--tip); }

.doc-hero {
    max-width: 920px;
    padding: 18px 0 4px;
}

.doc-hero h1 {
    max-width: 780px;
}

.quick-link-grid,
.doc-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
    margin: 18px 0;
}

.doc-grid.two-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.quick-link-grid a,
.info-panel {
    display: block;
    min-width: 0;
    min-height: 118px;
    padding: 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface);
    text-decoration: none;
}

.quick-link-grid a:hover {
    border-color: var(--accent);
    background: color-mix(in srgb, var(--surface) 90%, var(--accent-soft));
}

.quick-link-grid strong,
.info-panel h3 {
    display: block;
    margin: 0 0 8px;
    color: var(--text);
    font-size: 1rem;
    line-height: 1.25;
}

.quick-link-grid span,
.info-panel p {
    display: block;
    margin: 0;
    color: var(--muted);
    font-size: 0.94rem;
    line-height: 1.45;
}

.facts {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 14px 0 18px;
}

.fact {
    display: inline-flex;
    align-items: center;
    min-height: 30px;
    padding: 5px 10px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface);
    color: var(--muted);
    font-size: 0.88rem;
}

.fact b {
    margin-right: 5px;
    color: var(--text);
}

.flow-list {
    display: grid;
    gap: 10px;
    margin: 16px 0;
    padding: 0;
    list-style: none;
    counter-reset: flow-step;
}

.flow-list li {
    position: relative;
    min-height: 44px;
    padding: 10px 12px 10px 44px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface);
    color: var(--muted);
}

.flow-list li::before {
    position: absolute;
    top: 10px;
    left: 12px;
    display: inline-grid;
    place-items: center;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--accent-soft);
    color: var(--accent);
    content: counter(flow-step);
    counter-increment: flow-step;
    font-size: 0.76rem;
    font-weight: 700;
}

.api-note {
    margin: 8px 0 18px;
    color: var(--muted);
    font-size: 0.94rem;
}

.doc-layout-with-toc {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 220px;
    gap: 24px;
    align-items: start;
}

.page-toc {
    grid-column: 2;
    grid-row: 1 / span 40;
    position: sticky;
    top: 92px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 14px;
    border-left: 1px solid var(--border);
    color: var(--muted);
    font-size: 0.92rem;
}

.page-toc strong {
    color: var(--text);
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.page-toc a {
    color: var(--muted);
    display: block;
    line-height: 1.35;
    padding: 3px 0;
    text-decoration: none;
}

.page-toc .toc-link--h3 {
    padding-left: 12px;
    font-size: 0.88rem;
}

.page-toc a:hover {
    color: var(--accent);
}

.page-toc a.active {
    color: var(--accent);
    font-weight: 600;
}

.architecture {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
    margin: 18px 0;
}

.architecture div {
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface);
    font-weight: 700;
}

.architecture span {
    display: block;
    margin-top: 6px;
    color: var(--muted);
    font-weight: 400;
    font-size: 0.9rem;
}

.tabs [role="tablist"] {
    display: flex;
    gap: 8px;
    margin: 12px 0;
}

[role="tab"][aria-selected="true"] {
    color: var(--accent);
    background: var(--accent-soft);
}

.screenshot-placeholder {
    display: grid;
    place-items: center;
    min-height: 220px;
    padding: 24px;
    border: 1px dashed var(--border);
    border-radius: 8px;
    background: var(--surface);
    color: var(--muted);
    text-align: center;
}

.screenshot-figure {
    --screenshot-width: 260px;
    width: var(--screenshot-width);
    max-width: 100%;
    margin: 32px auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.screenshot-figure img {
    display: block;
    width: 100%;
    height: auto;
    max-height: 540px;
    object-fit: contain;
    border: 1px solid var(--border);
    border-radius: 20px;
    background: var(--surface);
    box-shadow: 0 12px 30px -4px rgba(0, 0, 0, 0.12), 0 4px 10px -2px rgba(0, 0, 0, 0.06);
    transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    cursor: zoom-in;
}

[data-theme="dark"] .screenshot-figure img {
    box-shadow: 0 16px 36px -4px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.screenshot-figure img:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px -4px rgba(0, 0, 0, 0.2), 0 8px 16px -4px rgba(0, 0, 0, 0.12);
}

[data-theme="dark"] .screenshot-figure img:hover {
    box-shadow: 0 24px 48px -4px rgba(0, 0, 0, 0.8), 0 0 0 1px rgba(255, 255, 255, 0.16);
}

.screenshot-figure.wide {
    --screenshot-width: 380px;
}

.screenshot-figure.compact {
    margin: 28px auto;
}

.screenshot-figure figcaption {
    margin-top: 12px;
    color: var(--muted);
    font-size: 0.9rem;
    line-height: 1.5;
    text-align: center;
    max-width: 320px;
}

.screenshot-figure figcaption code {
    font-size: 0.85em;
    padding: 2px 6px;
    background: var(--surface-muted, rgba(0, 0, 0, 0.04));
    border-radius: 4px;
}

.screenshot-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 260px));
    justify-content: center;
    gap: 24px;
    margin: 36px auto;
    width: 100%;
}

.screenshot-grid .screenshot-figure {
    margin: 0 auto;
    width: 100%;
}

.screenshot-grid .screenshot-figure.compact {
    margin: 0 auto;
}

/* ==========================================================================
   Image Lightbox & Zoom Viewer
   ========================================================================== */
.image-lightbox {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(10, 14, 20, 0.88);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
    user-select: none;
    overflow: hidden;
}

.image-lightbox.is-open {
    opacity: 1;
    visibility: visible;
}

.image-lightbox__header {
    position: absolute;
    top: 18px;
    right: 24px;
    left: 24px;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 12px;
    z-index: 20;
    pointer-events: none;
}

.image-lightbox__controls {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 6px 14px;
    background: rgba(26, 32, 44, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 40px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    pointer-events: auto;
}

.image-lightbox__btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background: transparent;
    color: #e2e8f0;
    cursor: pointer;
    font-size: 16px;
    line-height: 1;
    transition: background 0.15s ease, color 0.15s ease, transform 0.12s ease;
}

.image-lightbox__btn:hover {
    background: rgba(255, 255, 255, 0.16);
    color: #ffffff;
    transform: scale(1.06);
}

.image-lightbox__btn:active {
    transform: scale(0.94);
}

.image-lightbox__scale {
    color: #94a3b8;
    font-size: 13px;
    font-weight: 600;
    min-width: 52px;
    text-align: center;
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.02em;
}

.image-lightbox__close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    padding: 0;
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 50%;
    background: rgba(26, 32, 44, 0.85);
    color: #e2e8f0;
    cursor: pointer;
    font-size: 20px;
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    pointer-events: auto;
    transition: background 0.15s ease, color 0.15s ease, transform 0.12s ease, border-color 0.15s ease;
}

.image-lightbox__close:hover {
    background: rgba(239, 68, 68, 0.85);
    color: #ffffff;
    border-color: rgba(239, 68, 68, 0.9);
    transform: scale(1.06);
}

.image-lightbox__close:active {
    transform: scale(0.94);
}

.image-lightbox__stage {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    touch-action: none;
    cursor: zoom-out;
}

.image-lightbox__img {
    max-width: 88vw;
    max-height: 82vh;
    object-fit: contain;
    border-radius: 14px;
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.7);
    transform-origin: center center;
    transition: transform 0.12s cubic-bezier(0.16, 1, 0.3, 1);
    cursor: grab;
    will-change: transform;
    pointer-events: auto;
}

.image-lightbox__img.is-zoomed {
    cursor: grab;
}

.image-lightbox__img.is-dragging {
    cursor: grabbing;
    transition: none;
}

.image-lightbox__caption {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    max-width: 80vw;
    padding: 10px 22px;
    background: rgba(20, 24, 33, 0.88);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 30px;
    color: #f1f5f9;
    font-size: 14px;
    font-weight: 500;
    text-align: center;
    line-height: 1.45;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    pointer-events: none;
    z-index: 20;
    transition: opacity 0.2s ease;
}

.back-to-top {
    position: fixed;
    right: 20px;
    bottom: 20px;
    display: none;
}

.back-to-top.visible { display: inline-flex; }

.hidden-by-search { display: none; }

@media (max-width: 1100px) {
    .layout {
        grid-template-columns: 300px minmax(0, 1fr);
        max-width: none;
    }
    
    .sidebar {
        width: 300px;
    }

    .quick-link-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .doc-layout-with-toc {
        grid-template-columns: minmax(0, 1fr);
    }

    .content {
        grid-template-columns: minmax(0, 1fr);
    }

    .content > .breadcrumbs,
    .content > .doc-section,
    .content > .pagination-nav,
    .content > .page-footer,
    .content > .page-toc {
        grid-column: 1;
    }

    .page-toc {
        position: static;
        border-left: 0;
        border-top: 1px solid var(--border);
        padding: 12px 0;
    }
}

@media (max-width: 900px) {
    .topbar {
        grid-template-columns: auto 1fr auto;
    }

    .logo-button {
        display: inline-flex;
    }

    .ds-button {
        display: none;
    }
    .ds-keys {
        display: none;
    }

    .locale__label {
        max-width: 86px;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .layout {
        grid-template-columns: 1fr;
        padding: 0;
    }

    .layout > .sidebar,
    .layout > .content {
        grid-column: 1;
    }

    .sidebar {
        position: fixed;
        top: 64px;
        right: auto;
        bottom: 0;
        left: 0;
        width: min(320px, calc(100vw - 24px));
        max-width: 320px;
        height: calc(100vh - 64px);
        background: var(--surface);
        border-right: 1px solid var(--border);
        border-top: 1px solid var(--border);
        padding: 0;
        transform: translateX(-100%);
        transition: transform 0.2s ease;
        visibility: hidden;
        pointer-events: none;
        z-index: 9;
    }

    .sidebar nav {
        align-items: flex-start;
        width: 100%;
    }

    .menu-group__body {
        width: calc(100% - 18px);
    }

    .sidebar a {
        text-align: left;
    }

    .menu-item,
    .menu-group__link {
        width: 100%;
    }

    .sidebar.open {
        transform: translateX(0);
        visibility: visible;
        pointer-events: auto;
    }
    h1 { font-size: 32px; }
    .architecture, .screenshot-grid, .quick-link-grid, .doc-grid, .doc-grid.two-columns { grid-template-columns: 1fr; }
    .quick-link-grid a, .info-panel { min-height: 0; }
}

@media print {
    .topbar, .sidebar, .back-to-top, .copy-button { display: none !important; }
    body { background: #ffffff; color: #000000; }
    .layout { display: block; padding: 0; }
    .content { max-width: none; }
    pre { white-space: pre-wrap; border: 1px solid #cccccc; }
}

/* =========================================================================
   Search Modal
   ========================================================================= */

.ds-modal {
    position: fixed;
    inset: 0;
    z-index: 300;
    display: none;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    padding: max(8vh, 3rem) 1rem 1rem;
}

.ds-modal.on {
    display: block;
}

.ds-panel {
    max-width: 36rem;
    margin: 0 auto;
    background: var(--surface);
    border-radius: 12px;
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.2);
    overflow: hidden;
    border: 1px solid var(--border);
}

.ds-form {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
}

.ds-form svg {
    flex: 0 0 auto;
    color: var(--accent);
}

.ds-input {
    flex: 1;
    border: 0;
    outline: 0;
    background: none;
    font-size: 1.05rem;
    color: var(--text);
    font-family: inherit;
}

.ds-esc {
    font-family: ui-monospace, SFMono-Regular, monospace;
    font-size: 0.72rem;
    color: var(--muted);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 2px 6px;
}

.ds-results {
    max-height: min(60vh, 26rem);
    overflow-y: auto;
    padding: 8px;
}

.ds-group {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--muted);
    padding: 8px 10px 4px;
}

.ds-hit {
    display: block;
    padding: 8px 10px;
    border-radius: 6px;
    cursor: pointer;
    color: inherit;
    text-decoration: none;
}

.ds-hit:hover, .ds-hit.sel {
    background: var(--accent);
    color: #ffffff;
    text-decoration: none;
}

.ds-hit:hover .ds-path, .ds-hit.sel .ds-path {
    color: rgba(255, 255, 255, 0.85);
}

.ds-hit .ds-title {
    display: block;
    font-weight: 600;
    font-size: 0.95rem;
    line-height: 1.35;
}

.ds-hit .ds-path {
    display: block;
    font-size: 0.8rem;
    line-height: 1.35;
    color: var(--muted);
}

.ds-empty {
    padding: 2rem 1rem;
    text-align: center;
    color: var(--muted);
    font-size: 0.9rem;
}

.ds-foot {
    display: flex;
    gap: 16px;
    padding: 10px 16px;
    border-top: 1px solid var(--border);
    font-size: 0.75rem;
    color: var(--muted);
}

.ds-foot span span {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}