/* Flectone (Fumadocs) theme — exact palette from flectone.net */

:root {
  --background: #f8f8f8;
  --foreground: #0a0a0a;
  --card: #fcfcfc;
  --article: #fcfcfc;
  --primary: #3b6fbe;
  --primary-foreground: #f4f9ff;
  --secondary: #eee;
  --secondary-foreground: #171717;
  --muted: #eee;
  --muted-foreground: #737373;
  --accent: #e4e4e4;
  --accent-foreground: #3a3a3a;
  --border: #e8e8e8;
  --ring: #3b6fbe;
  --info: #2f7fff;
  --warning: #f69900;
  --error: #f82834;
  --success: #00c657;
  --sidebar: #f8f8f8;
  --sidebar-foreground: #0a0a0a;
  --sidebar-border: #e8e8e8;
  --sidebar-accent: #e4e4e4;
  --sidebar-accent-foreground: #3a3a3a;
  --radius: 0.625rem;
  --sidebar-width: 268px;
  --layout-width: 1400px;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

.dark {
  --background: #161616;
  --foreground: #ffffffd9;
  --card: #1b1b1b;
  --article: #191919;
  --primary: #72c1f3;
  --primary-foreground: #001829;
  --secondary: #262626;
  --secondary-foreground: #fafafa;
  --muted: #262626;
  --muted-foreground: #a1a1a1;
  --accent: #292929;
  --accent-foreground: #dedede;
  --border: #ffffff0d;
  --ring: #72c1f3;
  --sidebar: #161616;
  --sidebar-foreground: #fafafa;
  --sidebar-border: #161616;
  --sidebar-accent: #292929;
  --sidebar-accent-foreground: #dedede;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { -webkit-text-size-adjust: 100%; scroll-padding-top: 1rem; scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--background);
  color: var(--foreground);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-size: 1rem;
  line-height: 1.5;
}

img { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }

/* ── Layout grid (flectone: flank | sidebar | main | flank, no TOC) ── */

.layout {
  display: grid;
  --sb-track: calc(var(--sidebar-width) * var(--sb-scale, 1));
  grid-template-columns:
    minmax(0, 1fr)
    var(--sb-track)
    minmax(0, calc(var(--layout-width) - var(--sb-track)))
    minmax(0, 1fr);
  min-height: 100dvh;
  transition: grid-template-columns 0.25s ease;
}

body.collapsed { --sb-scale: 0; }

.sidebar {
  grid-column: 2;
  position: sticky;
  top: 0;
  height: 100dvh;
  min-width: 0;
  display: flex;
  flex-direction: column;
  background: var(--sidebar);
  color: var(--sidebar-foreground);
  border-inline-end: 1px solid var(--sidebar-border);
  overflow: hidden;
  transition: opacity 0.15s ease;
}
body.collapsed .sidebar { opacity: 0; pointer-events: none; }
.sidebar > .sidebar-head,
.sidebar > .sidebar-nav,
.sidebar > .sidebar-foot { flex-shrink: 0; width: var(--sidebar-width); }

.main {
  grid-column: 3;
  min-width: 0;
  padding-bottom: 1.25rem;
}

/* ── Sidebar header ── */

.sidebar-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 16px 8px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--sidebar-foreground);
  text-decoration: none;
  margin-inline-end: auto;
}

.logo img { width: 24px; height: 24px; margin-inline-end: 4px; }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px;
  border-radius: 6px;
  color: var(--muted-foreground);
  transition: background-color 0.1s, color 0.1s;
}
.icon-btn:hover { background: var(--accent); color: var(--accent-foreground); transition: none; }
.icon-btn svg { width: 18px; height: 18px; }

/* fumadocs focus rings */
.nav-item:focus-visible,
.nav-group-head .nav-item:focus-visible,
.icon-btn:focus-visible,
.chevron:focus-visible,
.reopen-btn:focus-visible,
.pager-card:focus-visible,
.logo:focus-visible,
.drawer-open-btn:focus-visible,
.drawer-close-btn:focus-visible,
.heading-anchor:focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
}

/* ── Sidebar nav ── */

.sidebar-nav {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  scrollbar-width: none;
  -webkit-mask-image: linear-gradient(to bottom, transparent, white 12px, white calc(100% - 12px), transparent);
  mask-image: linear-gradient(to bottom, transparent, white 12px, white calc(100% - 12px), transparent);
}
.sidebar-nav::-webkit-scrollbar { display: none; }

.nav-label {
  font-size: 0.875rem;
  padding: 0 8px;
  margin-top: 24px;
  margin-bottom: 4px;
  color: var(--sidebar-foreground);
}
.nav-label:first-child { margin-top: 0; }

.nav-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px;
  border-radius: 10px;
  font-size: 0.875rem;
  line-height: 1.25rem;
  color: var(--muted-foreground);
  text-decoration: none;
  transition: background-color 0.12s, color 0.12s;
  overflow-wrap: anywhere;
}
.nav-item:hover {
  background: color-mix(in srgb, var(--accent) 50%, transparent);
  color: color-mix(in srgb, var(--accent-foreground) 80%, transparent);
  transition: none; /* fumadocs: hover:transition-none */
}
.nav-item.active {
  background: color-mix(in srgb, var(--primary) 10%, transparent);
  color: var(--primary);
}
.nav-item svg { width: 16px; height: 16px; flex-shrink: 0; }

/* collapsible group */

/* flectone: chevron lives INSIDE the category link — one hover zone for the whole row */

.nav-group-head { width: 100%; }

.chevron {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 2px;
  margin-inline-start: auto;
  margin-inline-end: -4px;
  border-radius: 6px;
  color: inherit;
  transition: color 0.1s;
}
.chevron:hover { color: color-mix(in srgb, var(--accent-foreground) 80%, transparent); transition: none; }
.chevron svg { width: 16px; height: 16px; transition: transform 0.2s ease; }
.nav-group.open .chevron svg { transform: rotate(0deg); }
.nav-group:not(.open) .chevron svg { transform: rotate(-90deg); }

.nav-children {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.2s ease;
}
.nav-group.open .nav-children { grid-template-rows: 1fr; }
.nav-children-inner {
  min-height: 0;
  overflow: hidden;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-top: 2px;
}
.nav-children-inner::before {
  content: "";
  position: absolute;
  inset-block: 4px;
  inset-inline-start: 10px;
  width: 1px;
  background: var(--border);
}
.nav-children .nav-item {
  padding-inline-start: 20px;
  font-size: 0.8125rem;
}
.nav-children .nav-item.active::before {
  content: "";
  position: absolute;
  inset-block: 10px;
  inset-inline-start: 10px;
  width: 1px;
  background: var(--primary);
}

/* ── Sidebar footer: theme toggle (flectone segmented control) ── */

.sidebar-foot {
  display: flex;
  align-items: center;
  padding: 8px 16px 16px;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border);
  padding: 4px;
  overflow: hidden;
  margin-inline-start: auto;
  transition: border-color 0.1s;
}
.theme-toggle:hover { border-color: var(--accent); }
.theme-toggle svg {
  width: 26px;
  height: 26px;
  padding: 6px;
  border-radius: 6px;
  color: var(--muted-foreground);
  transition: background-color 0.1s, color 0.1s;
}
.theme-toggle svg:hover { background: var(--accent); color: var(--accent-foreground); }
.theme-toggle .icon-sun { display: inline-flex; }
.theme-toggle .icon-moon { display: none; }
.dark .theme-toggle .icon-sun { display: none; }
.dark .theme-toggle .icon-moon { display: inline-flex; }

/* ── Floating reopen button when sidebar collapsed ── */

.reopen-btn {
  display: none;
  position: fixed;
  top: 16px;
  inset-inline-start: 16px;
  z-index: 40;
  align-items: center;
  justify-content: center;
  padding: 6px;
  border-radius: 10px;
  background: var(--card);
  border: 1px solid var(--border);
  box-shadow: 0 4px 16px rgb(0 0 0 / 0.1);
  color: var(--muted-foreground);
}
.reopen-btn:hover { background: var(--accent); color: var(--accent-foreground); transition: none; }
.reopen-btn svg { width: 18px; height: 18px; }
body.collapsed .reopen-btn { display: inline-flex; }
body.drawer-open .drawer-backdrop { opacity: 1; visibility: visible; pointer-events: auto; transition: opacity 0.25s ease; }
body.drawer-open .drawer { transform: translateX(0); visibility: visible; transition: transform 0.25s ease; }

/* ── Article card (flectone nd-page) ── */

.article {
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 100%;
  max-width: 900px;
  margin: 24px auto 20px;
  padding: 32px 24px;
  background: var(--article);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.article-header { border-bottom: 1px solid var(--border); }
.article-header h1 {
  font-size: 1.75em;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.2;
}
.article-header p {
  font-size: 1.125rem;
  color: var(--muted-foreground);
  margin-bottom: 12px;
}

/* ── Prose ── */

.prose { font-size: 1rem; line-height: 1.75; flex: 1; color: var(--foreground); }

.prose h1 { font-size: 1.5em; font-weight: 600; margin: 2em 0 0.8em; line-height: 1.3; scroll-margin-top: 1rem; }
.prose h1:first-child { margin-top: 0; }
.prose h2 { font-size: 1.25em; font-weight: 600; margin: 1.75em 0 0.7em; line-height: 1.35; scroll-margin-top: 1rem; }
.prose h3 { font-size: 1.1em; font-weight: 600; margin: 1.5em 0 0.6em; scroll-margin-top: 1rem; }

.prose h1, .prose h2, .prose h3 { position: relative; }
.heading-anchor {
  display: inline-flex;
  vertical-align: middle;
  margin-inline-start: 6px;
  color: var(--muted-foreground);
  opacity: 0;
  transition: opacity 0.15s, color 0.1s;
}
.heading-anchor svg { width: 0.8em; height: 0.8em; }
.heading-anchor:hover { color: var(--primary); }
.prose h1:hover .heading-anchor,
.prose h2:hover .heading-anchor,
.prose h3:hover .heading-anchor,
.heading-anchor:focus-visible { opacity: 1; }

.prose p { margin: 1.1em 0; }
.prose p:first-child { margin-top: 0; }
.prose p:last-child { margin-bottom: 0; }

.prose a { color: var(--primary); text-decoration: none; }
.prose a:hover { text-decoration: underline; }

.prose strong { font-weight: 600; }

.prose ul, .prose ol { margin: 1.1em 0; padding-inline-start: 1.25em; }
.prose ul { list-style-type: disc; }
.prose ol { list-style-type: decimal; }
.prose li { margin: 0.4em 0; }
.prose li::marker { color: var(--muted-foreground); }

.prose code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--secondary);
  color: var(--secondary-foreground);
  padding: 0.15em 0.4em;
  border-radius: 4px;
}

.prose pre {
  font-family: var(--font-mono);
  background: var(--secondary);
  color: var(--secondary-foreground);
  padding: 1rem;
  border-radius: var(--radius);
  overflow-x: auto;
  font-size: 0.875rem;
  line-height: 1.6;
  margin: 1.25em 0;
}
.prose pre code { background: none; padding: 0; font-size: inherit; color: inherit; }

.prose hr { border: none; border-top: 1px solid var(--border); margin: 2.5em 0; }

.prose blockquote {
  border-inline-start: 2px solid var(--border);
  padding-inline-start: 1em;
  margin: 1.25em 0;
  color: var(--muted-foreground);
  font-style: italic;
}

/* ── Tables (flectone: wrapper with overflow) ── */

.prose .table-wrap {
  position: relative;
  overflow: auto;
  margin: 1.5rem 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.prose table { width: 100%; border-collapse: collapse; font-size: 0.875rem; }

.prose thead th {
  text-align: start;
  font-weight: 600;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--secondary);
  color: var(--secondary-foreground);
  white-space: nowrap;
}

.prose tbody td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--foreground);
}
.prose tbody tr:last-child td { border-bottom: none; }

/* ── Admonitions / callouts (flectone exact) ── */

.callout {
  display: flex;
  width: 100%;
  gap: 12px;
  padding: 12px;
  margin: 1rem 0;
  overflow: hidden;
  border: 1px solid;
  border-radius: var(--radius);
}

.callout-inner { display: flex; flex-direction: column; gap: 8px; }

.callout-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.25rem;
}
.callout-title p { margin: 0; }
.callout-title svg { width: 1em; height: 1em; flex-shrink: 0; }

.callout-body { font-size: 0.875rem; line-height: 1.5; }
.callout-body p { margin: 0; color: var(--foreground); }
.callout-body a { color: var(--primary); }
.callout-body code { background: color-mix(in srgb, currentColor 25%, transparent); }

.callout.warning {
  background: color-mix(in srgb, var(--warning) 20%, transparent);
  border-color: color-mix(in srgb, var(--warning) 10%, transparent);
}
.callout.warning .callout-title { color: var(--warning); }
.callout.warning .callout-body code { background: color-mix(in srgb, var(--warning) 40%, transparent); }

.callout.info {
  background: color-mix(in srgb, var(--info) 20%, transparent);
  border-color: color-mix(in srgb, var(--info) 10%, transparent);
}
.callout.info .callout-title { color: var(--info); }
.callout.info .callout-body code { background: color-mix(in srgb, var(--info) 40%, transparent); }

.callout.danger {
  background: color-mix(in srgb, var(--error) 15%, transparent);
  border-color: color-mix(in srgb, var(--error) 10%, transparent);
}
.callout.danger .callout-title { color: var(--error); }

.callout.success {
  background: color-mix(in srgb, var(--success) 15%, transparent);
  border-color: color-mix(in srgb, var(--success) 10%, transparent);
}
.callout.success .callout-title { color: var(--success); }

/* ── Steps (flectone fd-steps) ── */

.fd-steps {
  counter-reset: step;
  position: relative;
  border-inline-start: 1px solid var(--border);
  margin-inline-start: 8px;
  padding-inline-start: 24px;
  margin-block: 1rem;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

@media (min-width: 768px) {
  .fd-steps { margin-inline-start: 16px; padding-inline-start: 28px; }
}

.fd-step { position: relative; }
.fd-step p { margin: 0; }

.fd-step::before {
  content: counter(step);
  counter-increment: step;
  position: absolute;
  inset-inline-start: -16px;
  inset-block-start: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 9999px;
  background: var(--secondary);
  color: var(--secondary-foreground);
  font-size: 0.875rem;
  line-height: 1.25rem;
}

/* ── Pagination (flectone prev/next cards) ── */

.pager {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
@media (min-width: 860px) {
  .pager { grid-template-columns: 1fr 1fr; }
  .pager .prev { grid-column: 1; }
  .pager .next { grid-column: 2; }
}

.pager-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 0.875rem;
  color: var(--foreground);
  text-decoration: none;
  transition: background-color 0.12s, color 0.12s;
}
.pager-card:hover { background: color-mix(in srgb, var(--accent) 80%, transparent); transition: none; }

.pager-title {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
}
.pager-title svg { width: 16px; height: 16px; flex-shrink: 0; margin-inline: -4px; }

.pager-card.next { text-align: end; }
.pager-card.next .pager-title { flex-direction: row-reverse; }

.pager-desc {
  color: var(--muted-foreground);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── Mobile header ── */

.mobile-header {
  display: none;
  position: sticky;
  top: 0;
  z-index: 30;
  align-items: center;
  gap: 10px;
  height: 56px;
  padding-inline: 16px 10px;
  background: color-mix(in srgb, var(--background) 80%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.mobile-header .logo { margin-inline-end: 0; font-weight: 600; }
.mobile-header .logo img { width: 24px; height: 24px; }
.mobile-header .spacer { flex: 1; }

/* ── Mobile drawer ── */

.drawer-backdrop {
  position: fixed;
  inset: 0;
  background: #0003;
  z-index: 50;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.25s ease, visibility 0s linear 0.25s;
}
.drawer-backdrop.open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transition: opacity 0.25s ease;
}

.drawer {
  display: flex;
  position: fixed;
  inset-block: 0;
  inset-inline-start: 0;
  width: 300px;
  max-width: 85vw;
  z-index: 60;
  background: var(--sidebar);
  color: var(--sidebar-foreground);
  border-inline-end: 1px solid var(--sidebar-border);
  flex-direction: column;
  transform: translateX(-100%);
  visibility: hidden;
  transition: transform 0.25s ease, visibility 0s linear 0.25s;
}
.drawer.open {
  transform: translateX(0);
  visibility: visible;
  transition: transform 0.25s ease;
}

@media (min-width: 769px) {
  .drawer, .drawer-backdrop { display: none; }
}

/* ── Responsive ── */

@media (max-width: 1100px) {
  .layout { grid-template-columns: 0px var(--sb-track) minmax(0, 1fr) 0px; }
}

@media (max-width: 768px) {
  .layout { grid-template-columns: 1fr; transition: none; }
  .sidebar { display: none !important; }
  .reopen-btn { display: none !important; }
  .mobile-header { display: flex; }
  .main { grid-column: 1; }
  .article {
    margin: 16px 0 8px;
    padding: 8px 16px;
    border: none;
    border-radius: 0;
    background: var(--background);
  }
}

@media (max-width: 520px) {
  .pager .next, .pager .prev { grid-column: 1 !important; }
  .pager-card.next { text-align: start; }
  .pager-card.next .pager-title { flex-direction: row; }
}