/* ============================================================================
   ni-meet documentation center — hand-written stylesheet, no external assets.
   Layout: sticky top bar, left sidebar navigation, main article, right outline.
   Light is the default theme; `html[data-theme="dark"]` is an explicit user choice persisted by
   the header toggle in localStorage (`nimeet.docs.theme`). The OS preference is intentionally not
   consulted so the first visit is always light.
   ========================================================================== */

:root {
  color-scheme: light;
  --bg: #ffffff;
  --bg-soft: #f6f8fb;
  --bg-raised: #ffffff;
  --border: #e3e8ef;
  --border-strong: #cfd8e3;
  --text: #1b2430;
  --text-soft: #4b5866;
  --text-muted: #7b8794;
  --accent: #0b63f6;
  --accent-soft: #e8f0ff;
  --accent-strong: #0846b3;
  --code-bg: #0f172a;
  --code-text: #e2e8f0;
  --code-border: #1e293b;
  --ok: #0f8a5f;
  --warn: #a36100;
  --danger: #b42318;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 1px 2px rgb(16 24 40 / 6%), 0 8px 24px rgb(16 24 40 / 6%);
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Noto Sans SC", Roboto, Helvetica, Arial, sans-serif;
  --topbar-height: 56px;
  --sidebar-width: 264px;
  --toc-width: 232px;
}

html[data-theme='dark'] {
  color-scheme: dark;
  --bg: #0e1117;
  --bg-soft: #141a23;
  --bg-raised: #161d27;
  --border: #232c38;
  --border-strong: #2f3a49;
  --text: #e6ebf2;
  --text-soft: #b6c2d0;
  --text-muted: #8b98a8;
  --accent: #5c9bff;
  --accent-soft: #16263e;
  --accent-strong: #8bb8ff;
  --code-bg: #0b1220;
  --code-text: #dbe4f0;
  --code-border: #1c2634;
  --shadow: 0 1px 2px rgb(0 0 0 / 40%), 0 8px 24px rgb(0 0 0 / 32%);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--topbar-height) + 16px);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

code,
kbd,
pre {
  font-family: var(--mono);
  font-size: 0.875em;
}

/* ------------------------------------------------------------------ top bar */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: 8px 12px;
  background: var(--accent);
  color: #fff;
  border-radius: 0 0 var(--radius-sm) 0;
}

.skip-link:focus {
  left: 0;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 16px;
  height: var(--topbar-height);
  padding: 0 20px;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 2px;
  font-weight: 700;
  font-size: 18px;
  color: var(--text);
  white-space: nowrap;
}

.brand:hover {
  text-decoration: none;
}

.brand-mark {
  color: var(--accent);
}

.brand-sub {
  margin-left: 10px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
}

.nav-toggle {
  display: none;
  border: 1px solid var(--border);
  background: var(--bg-raised);
  color: var(--text);
  border-radius: var(--radius-sm);
  width: 34px;
  height: 34px;
  font-size: 16px;
  cursor: pointer;
}

.search {
  position: relative;
  flex: 1 1 420px;
  max-width: 520px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 10px;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-soft);
}

.search:focus-within {
  border-color: var(--accent);
  background: var(--bg-raised);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.search-icon {
  display: inline-flex;
  width: 16px;
  height: 16px;
  color: var(--text-muted);
}

.search-icon svg {
  width: 100%;
  height: 100%;
  fill: currentColor;
}

#search-input {
  flex: 1;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: 14px;
}

.search-results {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  max-height: min(70vh, 520px);
  overflow-y: auto;
  padding: 6px;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.search-results .result {
  display: block;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  color: var(--text);
}

.search-results .result:hover,
.search-results .result.active {
  background: var(--accent-soft);
  text-decoration: none;
}

.search-results .result-title {
  display: block;
  font-weight: 600;
  font-size: 14px;
}

.search-results .result-meta {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
}

.search-results .result-snippet {
  display: block;
  margin-top: 2px;
  font-size: 12.5px;
  color: var(--text-soft);
}

.search-results .result-snippet mark {
  background: color-mix(in srgb, var(--accent) 26%, transparent);
  color: inherit;
  border-radius: 2px;
}

.search-results .empty {
  padding: 10px;
  color: var(--text-muted);
  font-size: 14px;
}

.topbar-links {
  display: flex;
  gap: 14px;
  margin-left: auto;
  font-size: 13.5px;
  white-space: nowrap;
}

/* ------------------------------------------------------------------- layout */
.layout {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr) var(--toc-width);
  align-items: start;
  max-width: 1560px;
  margin: 0 auto;
}

.sidebar {
  position: sticky;
  top: var(--topbar-height);
  align-self: start;
  max-height: calc(100vh - var(--topbar-height));
  overflow-y: auto;
  padding: 24px 12px 40px 20px;
  border-right: 1px solid var(--border);
}

.nav-group {
  margin-bottom: 18px;
}

.nav-group-title {
  margin: 0 0 6px;
  padding: 0 10px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.nav-sub {
  margin: 10px 0 2px;
  padding: 0 10px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--text-muted);
  opacity: 0.9;
}

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

.sidebar a {
  display: block;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  color: var(--text-soft);
  font-size: 14px;
}

.sidebar a:hover {
  background: var(--bg-soft);
  color: var(--text);
  text-decoration: none;
}

.sidebar a[aria-current='page'] {
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-weight: 600;
}

.content {
  min-width: 0;
  padding: 24px 40px 64px;
}

/* --------------------------------------------------------------- breadcrumb */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  font-size: 13px;
  color: var(--text-muted);
}

.breadcrumb a {
  color: var(--text-muted);
}

.breadcrumb .sep {
  color: var(--border-strong);
}

.crumb-current {
  color: var(--text-soft);
}

.page-meta {
  margin: 12px 0 4px;
  padding: 8px 12px;
  border-left: 3px solid var(--accent);
  background: var(--bg-soft);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 12.5px;
  color: var(--text-muted);
}

.page-meta code {
  font-size: 12px;
}

/* ------------------------------------------------------------------- prose */
.prose {
  max-width: 860px;
}

.prose h1 {
  margin: 0 0 8px;
  font-size: 32px;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.prose h2 {
  margin: 40px 0 12px;
  padding-top: 8px;
  font-size: 23px;
  line-height: 1.35;
  border-top: 1px solid var(--border);
}

.prose h3 {
  margin: 28px 0 10px;
  font-size: 18.5px;
}

.prose h4 {
  margin: 22px 0 8px;
  font-size: 16px;
}

.prose .anchor {
  margin-left: 8px;
  color: var(--border-strong);
  font-weight: 400;
  opacity: 0;
  transition: opacity 120ms ease-in;
}

.prose h2:hover .anchor,
.prose h3:hover .anchor,
.prose h4:hover .anchor,
.prose .anchor:focus {
  opacity: 1;
  text-decoration: none;
}

.kicker {
  margin: 0 0 4px;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.lead {
  margin: 0 0 20px;
  font-size: 17px;
  color: var(--text-soft);
}

.prose p {
  margin: 0 0 14px;
}

.prose ul,
.prose ol {
  margin: 0 0 16px;
  padding-left: 22px;
}

.prose li {
  margin: 4px 0;
}

.prose li > ul {
  margin: 4px 0 4px;
}

.prose hr {
  margin: 32px 0;
  border: 0;
  border-top: 1px solid var(--border);
}

.prose blockquote {
  margin: 16px 0;
  padding: 10px 16px;
  border-left: 3px solid var(--border-strong);
  color: var(--text-soft);
  background: var(--bg-soft);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.prose :not(pre) > code {
  padding: 0.15em 0.4em;
  border-radius: 4px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--text);
  white-space: nowrap;
}

.prose img {
  max-width: 100%;
}

.muted {
  color: var(--text-muted);
  font-size: 13.5px;
}

/* ------------------------------------------------------------------ tables */
.table-wrap {
  margin: 16px 0 20px;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th,
td {
  padding: 8px 12px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--border);
}

th {
  background: var(--bg-soft);
  font-weight: 600;
  white-space: nowrap;
}

tbody tr:last-child td {
  border-bottom: 0;
}

td code {
  white-space: nowrap;
}

/* ------------------------------------------------------------- code blocks */
figure.code {
  margin: 16px 0 20px;
  border: 1px solid var(--code-border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--code-bg);
}

.code-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 10px 6px 14px;
  background: color-mix(in srgb, var(--code-bg) 70%, #ffffff 8%);
  border-bottom: 1px solid var(--code-border);
}

.code-lang {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: #93a4bd;
}

.copy {
  padding: 2px 10px;
  border: 1px solid #33415a;
  border-radius: 999px;
  background: transparent;
  color: #c7d3e6;
  font: inherit;
  font-size: 11.5px;
  cursor: pointer;
}

.copy:hover {
  border-color: #4c6288;
  color: #fff;
}

.copy.copied {
  border-color: var(--ok);
  color: #7ee2b8;
}

figure.code pre {
  margin: 0;
  padding: 14px 16px;
  overflow-x: auto;
  color: var(--code-text);
  line-height: 1.6;
  font-size: 13px;
  tab-size: 2;
}

figure.code code {
  font-size: inherit;
  white-space: pre;
}

/* token colours */
.tok-comment {
  color: #7d8ea8;
  font-style: italic;
}

.tok-string {
  color: #a5d6a7;
}

.tok-number {
  color: #ffcc80;
}

.tok-key {
  color: #90caf9;
}

.tok-keyword {
  color: #f48fb1;
}

.tok-literal {
  color: #ce93d8;
}

.tok-variable {
  color: #ffcc80;
}

.tok-flag {
  color: #80cbc4;
}

.tok-command {
  color: #e6ee9c;
}

/* ---------------------------------------------------------------- callouts */
.callout {
  margin: 18px 0;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-left-width: 3px;
  border-radius: var(--radius-sm);
  background: var(--bg-soft);
}

.callout p {
  margin: 0 0 8px;
}

.callout p:last-child {
  margin-bottom: 0;
}

.callout-title {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.callout-note {
  border-left-color: var(--accent);
}

.callout-note .callout-title {
  color: var(--accent);
}

.callout-tip {
  border-left-color: var(--ok);
}

.callout-tip .callout-title {
  color: var(--ok);
}

.callout-important {
  border-left-color: #7c3aed;
}

.callout-important .callout-title {
  color: #7c3aed;
}

.callout-warning {
  border-left-color: var(--warn);
}

.callout-warning .callout-title {
  color: var(--warn);
}

.callout-caution {
  border-left-color: var(--danger);
}

.callout-caution .callout-title {
  color: var(--danger);
}

/* -------------------------------------------------------------- API cards */
.op {
  margin: 22px 0;
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-raised);
}

.op h4 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 15px;
  flex-wrap: wrap;
}

.verb {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #fff;
  background: #64748b;
}

.verb-get {
  background: #0f8a5f;
}

.verb-post {
  background: #0b63f6;
}

.verb-put,
.verb-patch {
  background: #a36100;
}

.verb-delete {
  background: #b42318;
}

.op-summary {
  margin: 0 0 4px;
  font-weight: 600;
}

.op-desc {
  margin: 0 0 8px;
  color: var(--text-soft);
  font-size: 14.5px;
}

.op-auth {
  margin: 0 0 10px;
  font-size: 13px;
  color: var(--text-muted);
}

.op-label {
  margin: 14px 0 6px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
}

details.schema {
  margin: 10px 0;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-raised);
}

details.schema summary {
  cursor: pointer;
  font-size: 14.5px;
}

details.schema[open] summary {
  margin-bottom: 8px;
}

/* ------------------------------------------------------------- home cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin: 20px 0 28px;
}

.card {
  display: block;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-raised);
  color: var(--text);
}

.card:hover {
  border-color: var(--accent);
  text-decoration: none;
  box-shadow: var(--shadow);
}

.card strong {
  display: block;
  margin-bottom: 4px;
  font-size: 15.5px;
}

.card span {
  font-size: 13.5px;
  color: var(--text-soft);
}

/* ------------------------------------------------------------------- toc */
.toc {
  position: sticky;
  top: var(--topbar-height);
  align-self: start;
  max-height: calc(100vh - var(--topbar-height));
  overflow-y: auto;
  padding: 26px 20px 40px 0;
  font-size: 13px;
}

.toc-title {
  margin: 0 0 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.toc-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-left: 1px solid var(--border);
}

.toc-list li a {
  display: block;
  padding: 4px 0 4px 12px;
  border-left: 2px solid transparent;
  margin-left: -1px;
  color: var(--text-soft);
  line-height: 1.45;
}

.toc-list li a:hover {
  color: var(--text);
  text-decoration: none;
}

.toc-list li a.active {
  border-left-color: var(--accent);
  color: var(--accent-strong);
  font-weight: 600;
}

.toc-level-3 a {
  padding-left: 24px;
  font-size: 12.5px;
}

.toc-top {
  display: inline-block;
  margin-top: 14px;
  font-size: 12.5px;
  color: var(--text-muted);
}

/* ---------------------------------------------------------------- pager */
.pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 44px 0 0;
  max-width: 860px;
}

.pager-link {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-raised);
  color: var(--text);
}

.pager-link:hover {
  border-color: var(--accent);
  text-decoration: none;
}

.pager-next {
  text-align: right;
}

.pager-label {
  font-size: 12px;
  color: var(--text-muted);
}

.pager-title {
  font-weight: 600;
  font-size: 14.5px;
}

.page-footer {
  max-width: 860px;
  margin-top: 36px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  font-size: 12.5px;
  color: var(--text-muted);
}

.page-footer p {
  margin: 0 0 6px;
}

.page-footer code {
  font-size: 11.5px;
}

/* -------------------------------------------------------------- responsive */
@media (max-width: 1180px) {
  .layout {
    grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  }

  .toc {
    display: none;
  }

  .content {
    padding-right: 28px;
  }
}

@media (max-width: 860px) {
  .topbar {
    gap: 10px;
    padding: 0 12px;
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .brand-sub,
  .topbar-links {
    display: none;
  }

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

  .sidebar {
    position: fixed;
    z-index: 50;
    top: var(--topbar-height);
    bottom: 0;
    left: 0;
    width: min(84vw, var(--sidebar-width));
    padding: 18px 14px 40px;
    background: var(--bg);
    border-right: 1px solid var(--border);
    box-shadow: var(--shadow);
    transform: translateX(-102%);
    transition: transform 160ms ease-out;
    max-height: none;
  }

  body.nav-open .sidebar {
    transform: translateX(0);
  }

  .content {
    padding: 18px 16px 56px;
  }

  .prose h1 {
    font-size: 25px;
  }

  .prose h2 {
    font-size: 20px;
  }

  .pager {
    grid-template-columns: 1fr;
  }
}

@media print {
  .topbar,
  .sidebar,
  .toc,
  .pager,
  .copy,
  .anchor {
    display: none !important;
  }

  .layout {
    display: block;
  }

  .content {
    padding: 0;
  }

  figure.code {
    break-inside: avoid;
  }
}

/* ---------------------------------------------------------------- theme + locale */
.topbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}

.locale-switch {
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-soft);
}

.locale-switch:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: var(--bg-raised);
  color: var(--text-soft);
  cursor: pointer;
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.theme-toggle .theme-icon-dark,
html[data-theme='dark'] .theme-toggle .theme-icon-light {
  display: none;
}

html[data-theme='dark'] .theme-toggle .theme-icon-dark {
  display: inline-flex;
}

/* ---------------------------------------------------------------- page metadata */
.page-meta {
  margin: 0 0 6px;
  font-size: 12.5px;
  color: var(--text-muted);
}

.page-meta code {
  font-size: 12px;
}

.page-history {
  margin: 28px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--border);
  font-size: 13.5px;
}

.page-history summary {
  cursor: pointer;
  color: var(--text-soft);
  font-weight: 600;
}

.page-history ul {
  margin: 8px 0 0;
  padding-left: 20px;
}

.callout-warn {
  border-left: 4px solid var(--warn);
  background: color-mix(in srgb, var(--warn) 10%, var(--bg));
  padding: 10px 14px;
  border-radius: var(--radius-sm);
}

.badge {
  display: inline-block;
  border-radius: 999px;
  padding: 1px 9px;
  font-size: 12px;
  font-weight: 600;
  border: 1px solid var(--border-strong);
  color: var(--text-soft);
}

.badge-warn {
  border-color: var(--warn);
  color: var(--warn);
}

/* ---------------------------------------------------------------- API center */
.api-center-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 20px;
  margin-top: 18px;
}

@media (max-width: 1000px) {
  .api-center-grid {
    grid-template-columns: 1fr;
  }
}

.api-center-form label {
  display: block;
  margin: 10px 0;
  font-weight: 600;
  font-size: 13.5px;
}

.api-center-form input,
.api-center-form select,
.api-center-form textarea {
  display: block;
  width: 100%;
  margin-top: 4px;
  padding: 8px 10px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--bg-raised);
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
}

.api-center-form textarea,
.api-center-form pre,
.api-center-response pre {
  font-family: var(--mono);
  font-size: 12.5px;
}

.api-center-form fieldset {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 14px 12px;
  margin: 14px 0;
}

.api-center-form legend {
  font-weight: 700;
  font-size: 13px;
  padding: 0 6px;
}

.api-hint {
  display: block;
  font-weight: 400;
  color: var(--text-muted);
  font-size: 12px;
}

.api-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 12px;
}

.btn-primary,
.btn-secondary {
  border-radius: var(--radius-sm);
  border: 1px solid var(--accent);
  padding: 8px 16px;
  font-weight: 600;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-secondary {
  background: transparent;
  color: var(--accent);
}

.api-status {
  font-size: 13px;
  color: var(--text-soft);
}

.api-curl pre,
.api-center-response pre {
  background: var(--code-bg);
  color: var(--code-text);
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  overflow: auto;
  max-height: 360px;
}

.api-center-response h3 {
  margin-top: 0;
}

@media (max-width: 720px) {
  .topbar-links {
    display: none;
  }
}