:root {
--ink: #111827;
--muted: #64748b;
--line: #e2e8f0;
--soft: #f8fafc;
--purple: #6d28d9;
--purple-soft: #f5f3ff;
--code: #111827;
--header-height: 66px;
--sidebar-width: 276px;
--toc-width: 240px;
}

* {
box-sizing: border-box;
}

html {
scroll-behavior: smooth;
}

body {
margin: 0;
color: var(--ink);
background: #fff;
font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a {
color: inherit;
text-decoration: none;
}

.docs-header {
position: fixed;
inset: 0 0 auto;
z-index: 50;
height: var(--header-height);
padding: 0 28px;
border-bottom: 1px solid var(--line);
background: rgba(255, 255, 255, 0.96);
backdrop-filter: blur(16px);
display: grid;
grid-template-columns: var(--sidebar-width) minmax(320px, 620px) 1fr;
align-items: center;
gap: 30px;
}

.docs-brand {
display: flex;
align-items: center;
gap: 9px;
font-size: 20px;
letter-spacing: -0.03em;
}

.docs-brand > span {
color: var(--purple);
font-size: 27px;
}

.docs-brand .qf-brand-crown {
  width: 31px;
  height: 27px;
  display: block;
  object-fit: contain;
}

.docs-brand b {
padding: 4px 6px;
border: 1px solid #ddd6fe;
border-radius: 5px;
color: var(--purple);
background: var(--purple-soft);
font-size: 9px;
letter-spacing: 0.12em;
}

.docs-search {
height: 40px;
padding: 0 10px 0 13px;
border: 1px solid #cbd5e1;
border-radius: 8px;
display: flex;
align-items: center;
gap: 10px;
box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}

.docs-search > span {
color: #94a3b8;
}

.docs-search input,
.mobile-search input {
flex: 1;
min-width: 0;
border: 0;
outline: 0;
background: transparent;
font: inherit;
}

.docs-search kbd {
padding: 3px 6px;
border: 1px solid var(--line);
border-radius: 4px;
color: var(--muted);
background: var(--soft);
font: 10px inherit;
}

.docs-header > nav {
display: flex;
justify-content: flex-end;
gap: 24px;
color: #475569;
font-size: 13px;
font-weight: 650;
}

.docs-header > nav a:hover {
color: var(--purple);
}

.docs-shell {
display: grid;
grid-template-columns: var(--sidebar-width) minmax(0, 1fr) var(--toc-width);
max-width: 1600px;
min-height: 100vh;
margin: 0 auto;
padding-top: var(--header-height);
}

.docs-sidebar {
position: fixed;
top: var(--header-height);
bottom: 0;
width: var(--sidebar-width);
padding: 24px 24px 28px 28px;
border-right: 1px solid var(--line);
overflow-y: auto;
background: #fff;
}

.version-row {
display: flex;
align-items: center;
justify-content: space-between;
margin-bottom: 22px;
color: var(--muted);
font-size: 11px;
font-weight: 700;
text-transform: uppercase;
letter-spacing: 0.08em;
}

.version-row b {
padding: 3px 6px;
border-radius: 4px;
color: #475569;
background: #f1f5f9;
font-size: 9px;
}

.nav-group {
margin-bottom: 24px;
}

.nav-group > strong {
display: block;
margin-bottom: 8px;
color: #94a3b8;
font-size: 10px;
letter-spacing: 0.12em;
text-transform: uppercase;
}

.nav-group a {
display: block;
padding: 7px 10px;
margin: 2px 0;
border-radius: 6px;
color: #475569;
font-size: 13px;
line-height: 1.35;
}

.nav-group a:hover {
color: var(--purple);
background: #fafafa;
}

.nav-group a.active {
color: var(--purple);
background: var(--purple-soft);
font-weight: 750;
}

.docs-sidebar footer {
padding-top: 18px;
border-top: 1px solid var(--line);
display: grid;
gap: 6px;
font-size: 11px;
}

.docs-sidebar footer span {
color: var(--muted);
}

.docs-sidebar footer a {
color: var(--purple);
font-weight: 700;
}

.docs-main {
grid-column: 2;
width: 100%;
max-width: 900px;
padding: 54px 64px 100px;
margin: 0 auto;
}

.mobile-search {
display: none;
}

.article-kicker {
display: inline-flex;
padding: 5px 8px;
border: 1px solid #ddd6fe;
border-radius: 5px;
color: var(--purple);
background: var(--purple-soft);
font-size: 10px;
font-weight: 850;
letter-spacing: 0.1em;
}

.docs-main h1 {
margin: 16px 0 14px;
font-size: 39px;
letter-spacing: -0.045em;
line-height: 1.12;
}

.article-summary {
margin: 0 0 34px;
color: var(--muted);
font-size: 17px;
line-height: 1.7;
}

.article-meta {
display: flex;
gap: 18px;
padding: 12px 0 28px;
margin-bottom: 28px;
border-bottom: 1px solid var(--line);
color: #94a3b8;
font-size: 11px;
}

.docs-main h2 {
scroll-margin-top: 90px;
margin: 46px 0 14px;
font-size: 25px;
letter-spacing: -0.025em;
}

.docs-main h3 {
scroll-margin-top: 90px;
margin: 30px 0 10px;
font-size: 17px;
}

.docs-main p,
.docs-main li {
color: #475569;
font-size: 14px;
line-height: 1.75;
}

.docs-main ul,
.docs-main ol {
padding-left: 22px;
}

.docs-main li {
margin: 7px 0;
}

.docs-main code {
padding: 2px 5px;
border-radius: 4px;
color: #5b21b6;
background: var(--purple-soft);
font: 12px "SFMono-Regular", Consolas, monospace;
}

.docs-main pre {
position: relative;
padding: 20px;
border-radius: 10px;
overflow-x: auto;
color: #e2e8f0;
background: var(--code);
box-shadow: 0 12px 30px rgba(15, 23, 42, 0.13);
}

.docs-main pre code {
padding: 0;
color: inherit;
background: transparent;
line-height: 1.65;
}

.callout {
padding: 16px 18px;
margin: 22px 0;
border-left: 3px solid var(--purple);
border-radius: 0 8px 8px 0;
background: var(--purple-soft);
}

.callout.warning {
border-left-color: #d97706;
background: #fffbeb;
}

.language-guide {
display: grid;
grid-template-columns: repeat(2, minmax(0, 1fr));
gap: 18px;
margin: 18px 0;
}

.language-guide article,
.visual-steps figure {
border: 1px solid var(--line);
border-radius: 14px;
background:
radial-gradient(circle at 90% 0%, rgba(124, 58, 237, 0.1), transparent 34%),
#fff;
}

.language-guide article {
padding: 18px;
}

.language-guide h3 {
margin-top: 0;
}

.visual-steps {
display: grid;
grid-template-columns: repeat(4, minmax(0, 1fr));
gap: 12px;
margin: 18px 0 24px;
}

.visual-steps figure {
min-height: 170px;
margin: 0;
padding: 16px;
position: relative;
overflow: hidden;
}

.visual-steps figure::after {
content: "";
position: absolute;
right: -24px;
bottom: -34px;
width: 110px;
height: 110px;
border-radius: 50%;
background: rgba(168, 85, 247, 0.1);
}

.visual-steps span {
width: 34px;
height: 34px;
display: grid;
place-items: center;
border-radius: 999px;
color: white;
background: linear-gradient(135deg, var(--purple), #4f46e5);
font-weight: 850;
}

.visual-steps strong {
display: block;
margin-top: 16px;
color: var(--text);
}

.visual-steps p {
margin-bottom: 0;
font-size: 12px;
}

.callout strong {
display: block;
margin-bottom: 5px;
font-size: 13px;
}

.callout p {
margin: 0;
font-size: 13px;
}

.reference-table {
width: 100%;
margin: 20px 0;
border: 1px solid var(--line);
border-radius: 8px;
border-spacing: 0;
overflow: hidden;
font-size: 13px;
}

.reference-table th,
.reference-table td {
padding: 12px 14px;
border-bottom: 1px solid var(--line);
text-align: left;
vertical-align: top;
}

.reference-table tr:last-child td {
border-bottom: 0;
}

.reference-table th {
color: #334155;
background: var(--soft);
font-size: 11px;
text-transform: uppercase;
letter-spacing: 0.06em;
}

.reference-table td {
color: #475569;
}

.docs-toc {
position: fixed;
top: var(--header-height);
right: max(0px, calc((100vw - 1600px) / 2));
bottom: 0;
width: var(--toc-width);
padding: 54px 26px;
border-left: 1px solid var(--line);
background: #fff;
}

.docs-toc > strong {
display: block;
margin-bottom: 12px;
color: #94a3b8;
font-size: 9px;
letter-spacing: 0.13em;
}

.docs-toc a {
display: block;
padding: 5px 0;
color: var(--muted);
font-size: 11px;
line-height: 1.4;
}

.docs-toc a:hover {
color: var(--purple);
}

.search-results {
position: fixed;
z-index: 80;
top: 58px;
left: 50%;
width: min(620px, calc(100vw - 40px));
max-height: 440px;
padding: 8px;
border: 1px solid var(--line);
border-radius: 10px;
overflow-y: auto;
background: #fff;
box-shadow: 0 22px 60px rgba(15, 23, 42, 0.18);
transform: translateX(-50%);
}

.search-result {
display: grid;
gap: 4px;
padding: 12px;
border-radius: 7px;
}

.search-result:hover {
background: var(--soft);
}

.search-result strong {
font-size: 13px;
}

.search-result span {
color: var(--muted);
font-size: 11px;
}

.search-empty {
padding: 26px;
color: var(--muted);
font-size: 13px;
text-align: center;
}

@media (max-width: 1160px) {
.docs-shell {
grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
}

.docs-toc {
display: none;
}
}

@media (max-width: 820px) {
.language-guide,
.visual-steps {
grid-template-columns: 1fr;
}

.docs-header {
grid-template-columns: 1fr auto;
}

.docs-header .docs-search {
display: none;
}

.docs-header > nav a:last-child {
display: none;
}

.docs-shell {
display: block;
}

.docs-sidebar {
display: none;
}

.docs-main {
padding: 30px 24px 80px;
}

.mobile-search {
height: 42px;
margin-bottom: 34px;
padding: 0 12px;
border: 1px solid var(--line);
border-radius: 8px;
display: flex;
}

.docs-main h1 {
font-size: 33px;
}
}