:root {
  --bg: #fcfbff;
  --panel: #fcfbff;
  --panel-strong: #ffffff;
  --border: #e6def5;
  --text: #1c1033;
  --muted: #6e628a;
  --accent: #7c5cff;
  --accent-soft: rgba(124, 92, 255, 0.12);
  --shadow: none;
  --graph-bg: #faf7ff;
  --link: #6643db;
  --code-bg: #f7f2ff;
  --toc-active: #f1ebff;
  --overlay: rgba(24, 12, 48, 0.48);
  --mark-bg: rgba(156, 120, 255, 0.28);
}

html[data-theme="dark"] {
  --bg: #171320;
  --panel: #171320;
  --panel-strong: #1d1729;
  --border: #31264a;
  --text: #f0eaff;
  --muted: #ab9fc8;
  --accent: #b39aff;
  --accent-soft: rgba(179, 154, 255, 0.12);
  --shadow: none;
  --graph-bg: #1a1428;
  --link: #c9bbff;
  --code-bg: #241d36;
  --toc-active: #261e39;
  --overlay: rgba(7, 4, 15, 0.58);
  --mark-bg: rgba(179, 154, 255, 0.34);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

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

a:hover {
  text-decoration: underline;
}

code,
pre {
  font-family: "Cascadia Code", Consolas, monospace;
}

.app-shell {
  min-height: 100vh;
  margin: 0 auto;
  padding: 0 18px 18px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 0;
  padding: 14px 0 12px;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand {
  color: var(--text);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0;
  text-transform: none;
}

.topbar-actions {
  display: flex;
  gap: 8px;
}

.action-button {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel);
  color: var(--muted);
  padding: 8px 12px;
  cursor: pointer;
  font: inherit;
}

.action-button:hover {
  background: var(--accent-soft);
  color: var(--text);
}

.search-trigger span {
  color: var(--muted);
  margin-left: 6px;
}

.theme-switch {
  border: 0;
  background: transparent;
  padding: 0;
  cursor: pointer;
}

.theme-switch-track {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  width: 72px;
  height: 36px;
  padding: 0 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--panel);
  transition: border-color 180ms ease, background-color 180ms ease;
}

.theme-switch:hover .theme-switch-track {
  background: var(--accent-soft);
}

.theme-switch-icon {
  position: relative;
  z-index: 1;
  display: inline-flex;
  width: 15px;
  height: 15px;
  color: var(--muted);
}

.theme-switch-icon svg {
  width: 100%;
  height: 100%;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.theme-switch-icon-moon svg {
  fill: currentColor;
  stroke: none;
}

.theme-switch-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
  transition: transform 180ms ease, background-color 180ms ease;
}

html[data-theme="dark"] .theme-switch-thumb {
  transform: translateX(36px);
}

html[data-theme="light"] .theme-switch-icon-sun,
:root:not([data-theme="dark"]) .theme-switch-icon-sun {
  color: #ffffff;
}

html[data-theme="dark"] .theme-switch-icon-moon {
  color: #ffffff;
}

html[data-theme="dark"] .theme-switch-icon-sun,
html[data-theme="light"] .theme-switch-icon-moon,
:root:not([data-theme="dark"]) .theme-switch-icon-moon {
  color: var(--muted);
}

.layout-grid {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr) 290px;
  grid-template-areas: "left center right";
  gap: 0;
  align-items: start;
}

.panel {
  background: var(--panel);
  box-shadow: var(--shadow);
  min-height: calc(100vh - 96px);
}

.left-panel {
  grid-area: left;
  padding: 24px 18px 24px 0;
  position: sticky;
  top: 58px;
  border-right: 1px solid var(--border);
}

.center-panel {
  grid-area: center;
  padding: 24px 34px 40px;
}

.right-panel {
  grid-area: right;
  padding: 24px 0 24px 18px;
  position: sticky;
  top: 58px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  border-left: 1px solid var(--border);
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
}

.panel-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 4px;
  margin-left: auto;
}

.panel-action-link {
  border: 0;
  background: transparent;
  padding: 0;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-size: 0.82rem;
  line-height: 1;
}

.panel-action-link:hover {
  color: var(--text);
  text-decoration: underline;
}

.panel-actions-separator {
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1;
}

.panel-title {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.article-card,
.sidebar-card {
  border: 0;
  border-radius: 0;
  background: transparent;
}

.article-card {
  padding: 0;
}

.sidebar-card {
  padding: 0;
}

.article-meta {
  margin-bottom: 10px;
}

.eyebrow {
  display: inline-block;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.article-title {
  margin: 0;
  font-size: clamp(2rem, 3.1vw, 3rem);
  line-height: 1.08;
  font-weight: 700;
}

.article-description {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.98rem;
  width: 100%;
  max-width: none;
}

.article-content {
  margin-top: 24px;
  display: block;
  font-size: 1rem;
  line-height: 1.72;
  width: 100%;
  max-width: none;
}

.article-content > * {
  max-width: none;
}

.article-content h2,
.article-content h3,
.article-content h4 {
  scroll-margin-top: 100px;
  line-height: 1.18;
}

.article-content h2 {
  margin-top: 2.45rem;
  margin-bottom: 0.7rem;
  font-size: 1.6rem;
}

.article-content h3 {
  margin-top: 1.7rem;
  margin-bottom: 0.6rem;
  font-size: 1.18rem;
}

.article-content p,
.article-content ul,
.article-content blockquote,
.article-content pre {
  margin: 0 0 1rem;
}

.article-content ul {
  padding-left: 1.3rem;
}

.article-content blockquote {
  margin-left: 0;
  padding: 10px 14px;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
}

.article-content pre {
  overflow-x: auto;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--code-bg);
}

.article-content code {
  padding: 0.16rem 0.34rem;
  border-radius: 4px;
  background: var(--code-bg);
}

.internal-link {
  font-weight: 600;
}

.broken-link {
  color: #9f5cff;
}

.article-footer-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
  margin-top: 42px;
  padding-top: 22px;
  border-top: 1px solid var(--border);
}

.content-block {
  padding: 0;
  border: 0;
  background: transparent;
}

.content-block h2 {
  margin: 0 0 12px;
  font-size: 0.92rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.link-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.link-list li {
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.link-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.link-list p,
.empty-state {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.93rem;
}

.tree-nav {
  max-height: calc(100vh - 220px);
  overflow: auto;
  padding-right: 8px;
}

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

.tree-item + .tree-item {
  margin-top: 2px;
}

.tree-folder {
  margin-left: 3px;
  padding-left: 0;
}

.tree-folder > summary {
  list-style: none;
  cursor: pointer;
  color: var(--muted);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 8px 5px 10px;
  border-radius: 6px;
  font-size: 0.95rem;
  line-height: 1.35;
  overflow: visible;
}

.tree-folder > .tree-list {
  position: relative;
  margin: 2px 0 0 5px;
  padding-left: 6px;
}

.tree-folder > .tree-list::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 8px;
  width: 1px;
  background: var(--border);
}

.tree-folder > .tree-list > .tree-item {
  position: relative;
}

.tree-folder > .tree-list > .tree-item::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 17px;
  width: 6px;
  height: 1px;
  background: var(--border);
}

.tree-folder > summary::-webkit-details-marker {
  display: none;
}

.tree-folder > summary::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 10px;
  min-width: 10px;
  border-right: 1.7px solid currentColor;
  border-bottom: 1.7px solid currentColor;
  box-sizing: border-box;
  flex: 0 0 auto;
  transform: rotate(-45deg);
  transform-origin: 50% 50%;
  transition: transform 180ms ease;
  margin-top: -1px;
  margin-left: 1px;
}

.tree-folder[open] > summary::before {
  transform: rotate(45deg);
}

.tree-folder > summary:hover {
  background: var(--accent-soft);
  color: var(--text);
}

.tree-link {
  display: block;
  padding: 5px 8px;
  border-radius: 6px;
  color: var(--text);
  font-size: 0.95rem;
}

.tree-folder > .tree-list > .tree-folder-item:last-child > .tree-folder > .tree-list::before,
.tree-folder > .tree-list > .tree-page-item:last-child::before {
  bottom: auto;
}

.tree-link:hover,
.tree-link.is-active {
  background: var(--accent-soft);
  text-decoration: none;
}

.panel-foot {
  margin-top: 18px;
  padding-top: 14px;
  padding-bottom: 1.5em;
  border-top: 1px solid var(--border);
}

.panel-foot p {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.5;
}

.graph-view {
  width: 100%;
  height: 250px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--graph-bg);
  overflow: hidden;
}

.graph-card,
.toc-card {
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border);
}

.telegram-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 46px;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--text);
  font-size: 1rem;
  font-weight: 600;
}

.telegram-link:hover {
  text-decoration: none;
  background: var(--toc-active);
}

.telegram-card {
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border);
}

.toc-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.toc-nav a {
  display: block;
  padding: 5px 8px;
  border-left: 2px solid transparent;
  color: var(--muted);
  border-radius: 6px;
  font-size: 0.92rem;
}

.toc-nav a.is-active {
  border-left-color: var(--accent);
  color: var(--text);
  background: var(--toc-active);
}

.toc-level-3 a {
  padding-left: 18px;
}

.toc-level-4 a {
  padding-left: 30px;
}

.search-modal[hidden] {
  display: none;
}

.search-modal {
  position: fixed;
  inset: 0;
  z-index: 40;
}

.search-backdrop {
  position: absolute;
  inset: 0;
  background: var(--overlay);
  backdrop-filter: blur(6px);
}

.search-dialog {
  position: relative;
  z-index: 1;
  width: min(760px, calc(100vw - 24px));
  margin: 6vh auto 0;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--panel-strong);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.search-header {
  display: flex;
  gap: 10px;
  padding: 14px;
  border-bottom: 1px solid var(--border);
}

.search-input {
  flex: 1;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: transparent;
  color: var(--text);
  font: inherit;
  padding: 12px 14px;
}

.search-results {
  max-height: 60vh;
  overflow: auto;
  padding: 10px 14px 14px;
}

.search-result {
  display: block;
  padding: 14px;
  border-radius: 10px;
  color: var(--text);
}

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

.search-result-title {
  display: block;
  font-weight: 700;
  margin-bottom: 4px;
}

.search-result-snippet {
  color: var(--muted);
  font-size: 0.92rem;
}

mark {
  padding: 0 0.2em;
  border-radius: 4px;
  background: var(--mark-bg);
}

@media (max-width: 1080px) {
  .layout-grid {
    grid-template-columns: 240px minmax(0, 1fr);
    grid-template-areas:
      "left center"
      "right right";
  }

  .right-panel {
    position: static;
    min-height: auto;
    border-left: 0;
    padding-left: 0;
  }
}

@media (max-width: 760px) {
  .app-shell {
    padding: 10px;
  }

  .layout-grid {
    grid-template-columns: 1fr;
    grid-template-areas:
      "left"
      "center"
      "right";
  }

  .left-panel,
  .right-panel {
    position: static;
    min-height: auto;
    border: 0;
    padding: 16px 0;
  }

  .center-panel {
    padding: 16px 0 24px;
  }

  .article-card {
    padding: 0;
  }

  .article-footer-grid {
    grid-template-columns: 1fr;
  }

  .topbar {
    flex-direction: column;
    align-items: stretch;
  }

  .topbar-actions {
    justify-content: space-between;
  }
}