/* Site chrome: top bar, library rail, page grid, search dialog, responsive behaviour. */

.medwiki-shell {
  min-height: 100vh;
  background: var(--paper);
}

.reading-progress {
  position: fixed;
  inset: 0 auto auto 0;
  z-index: 100;
  width: 100%;
  height: 3px;
  background: var(--primary);
  transform-origin: left;
  transform: scaleX(0);
}

/* ---------- Top bar ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: grid;
  grid-template-columns: var(--rail-w) minmax(280px, 560px) 1fr;
  align-items: center;
  gap: 30px;
  height: var(--topbar-h);
  padding: 0 34px;
  border-bottom: 1px solid var(--border);
  background: color-mix(in oklab, var(--paper) 94%, transparent);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
}

.wordmark {
  display: flex;
  align-items: baseline;
  gap: 9px;
  min-width: 0;
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 600;
}

.wordmark-mark {
  display: grid;
  place-items: center;
  width: 31px;
  height: 31px;
  border-radius: 8px;
  background: linear-gradient(135deg, #5b8fc4, #163669);
  color: #fff;
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 700;
}

.wordmark small {
  padding-left: 10px;
  border-left: 1px solid var(--border);
  color: var(--muted-foreground);
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.search-launcher {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  height: 40px;
  padding: 0 10px 0 13px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--paper-soft);
  color: var(--muted-foreground);
  text-align: left;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.search-launcher:hover {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--primary) 12%, transparent);
}

.search-launcher > svg {
  width: 16px;
  height: 16px;
}

.search-launcher span {
  overflow: hidden;
  font-size: 13px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

kbd {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 3px 6px;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--paper);
  font-size: 11px;
}

kbd svg {
  width: 11px;
  height: 11px;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  justify-self: end;
}

.sync-label {
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--muted-foreground);
  font-size: 12px;
}

.sync-label i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--clinical);
}

.icon-control {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 4px;
  color: var(--muted-foreground);
}

.icon-control:hover {
  background: var(--paper-soft);
  color: var(--foreground);
}

.icon-control svg {
  width: 18px;
  height: 18px;
}

.mobile-menu,
.mobile-rail-head,
.mobile-scrim {
  display: none;
}

/* ---------- Page grid ---------- */

.page-grid {
  display: grid;
  grid-template-columns: var(--rail-w) minmax(0, 1fr) var(--context-w);
  min-height: calc(100vh - var(--topbar-h));
}

.page-grid.no-context {
  grid-template-columns: var(--rail-w) minmax(0, 1fr);
}

.library-rail,
.context-rail {
  position: sticky;
  top: var(--topbar-h);
  height: calc(100vh - var(--topbar-h));
  overflow-y: auto;
  background: var(--paper);
  scrollbar-width: thin;
}

.library-rail {
  padding: 36px 26px 50px 34px;
  border-right: 1px solid var(--border);
}

.context-rail {
  padding: 38px 28px 50px;
  border-left: 1px solid var(--border);
}

.rail-label {
  margin: 0 0 12px;
  color: var(--muted-foreground);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.rail-label.section-label {
  margin-top: 30px;
}

.rail-link,
.chapter-trigger {
  display: flex;
  align-items: center;
  gap: 9px;
  width: 100%;
  min-height: 34px;
  padding: 6px 8px;
  border-radius: 3px;
  color: var(--ink-soft);
  font-size: 13px;
  text-align: left;
  transition: color 0.15s, background 0.15s;
}

.rail-link svg,
.chapter-trigger svg {
  width: 14px;
  height: 14px;
  color: var(--muted-foreground);
}

.rail-link:hover,
.chapter-trigger:hover {
  background: var(--paper-soft);
  color: var(--primary);
}

.rail-link.active {
  background: var(--accent);
  box-shadow: inset 2px 0 var(--primary);
  color: var(--primary);
  font-weight: 600;
}

.rail-link.is-soon {
  color: var(--muted-foreground);
  cursor: default;
}

.rail-link.is-soon:hover {
  background: none;
  color: var(--muted-foreground);
}

.rail-link em {
  margin-left: auto;
  font-size: 10px;
  font-style: normal;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  opacity: 0.8;
}

.chapter-list {
  margin: 3px 0 8px 14px;
  padding-left: 8px;
  border-left: 1px solid var(--border);
}

.chapter-list .rail-link {
  font-size: 12.5px;
}

.chapter-list .chapter-list .rail-link {
  font-size: 12px;
}

.article-main {
  min-width: 0;
  padding: 36px clamp(35px, 5vw, 72px) 120px;
  background: var(--paper);
}

/* ---------- Command palette ---------- */

.palette-overlay {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 10vh 20px;
  background: color-mix(in oklab, var(--foreground) 30%, transparent);
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
}

.palette-overlay[hidden] {
  display: none;
}

.palette {
  display: flex;
  flex-direction: column;
  width: min(640px, 100%);
  max-height: 74vh;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--paper);
  box-shadow: var(--shadow-dialog);
  animation: dialog-in 0.16s ease-out;
}

.palette-input {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 6px 16px;
  border-bottom: 1px solid var(--border);
}

.palette-input > svg {
  width: 18px;
  height: 18px;
  color: var(--muted-foreground);
}

.palette-input input {
  min-width: 0;
  height: 48px;
  border: 0;
  outline: 0;
  background: none;
  font-size: 17px;
}

.palette-list {
  flex: 1;
  overflow-y: auto;
  padding: 4px 8px 8px;
}

.palette-group {
  padding: 12px 10px 4px;
  color: var(--muted-foreground);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.palette-item {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  align-items: start;
  gap: 10px;
  width: 100%;
  padding: 9px 10px;
  border-radius: 5px;
  text-align: left;
}

.palette-item.is-selected {
  background: var(--accent);
}

.palette-icon {
  padding-top: 2px;
  color: var(--muted-foreground);
}

.palette-icon svg {
  width: 16px;
  height: 16px;
}

.palette-text {
  display: flex;
  flex-direction: column;
  gap: 1px;
  min-width: 0;
}

.palette-text strong {
  font-size: 14.5px;
  font-weight: 600;
}

.palette-heading {
  color: var(--primary);
  font-size: 13px;
}

.palette-snippet {
  color: var(--ink-soft);
  font-size: 12.5px;
  line-height: 1.45;
}

.palette-snippet mark,
.palette-text mark {
  background: color-mix(in oklab, var(--primary) 22%, transparent);
  color: inherit;
  border-radius: 2px;
}

.palette-text small {
  color: var(--muted-foreground);
  font-size: 12px;
}

.palette-empty {
  padding: 28px 12px;
  color: var(--muted-foreground);
  font-size: 14px;
  text-align: center;
}

.palette-foot {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 16px;
  border-top: 1px solid var(--border);
  color: var(--muted-foreground);
  font-size: 11.5px;
}

@keyframes dialog-in {
  from {
    opacity: 0;
    transform: translateY(-8px) scale(0.985);
  }
}

/* ---------- Responsive ---------- */

@media (max-width: 1180px) {
  .page-grid,
  .page-grid.no-context {
    grid-template-columns: 230px minmax(0, 1fr);
  }

  .context-rail {
    display: none;
  }

  .topbar {
    grid-template-columns: 226px minmax(280px, 520px) 1fr;
  }

  .article-main {
    padding-inline: clamp(35px, 7vw, 80px);
  }
}

@media (max-width: 780px) {
  :root {
    --topbar-h: 58px;
  }

  .topbar {
    grid-template-columns: auto minmax(0, 1fr) auto auto;
    gap: 8px;
    padding: 0 14px;
  }

  .mobile-menu {
    display: grid;
  }

  .wordmark {
    font-size: 21px;
  }

  .wordmark-mark,
  .wordmark small,
  .search-launcher span,
  .search-launcher kbd,
  .sync-label {
    display: none;
  }

  .search-launcher {
    place-items: center;
    justify-self: end;
    width: 36px;
    height: 36px;
    padding: 0;
    border: 0;
    background: none;
  }

  .top-actions {
    gap: 0;
    justify-self: auto;
  }

  .page-grid,
  .page-grid.no-context {
    display: block;
  }

  .library-rail {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 80;
    width: min(310px, 88vw);
    height: 100vh;
    padding: 18px 22px 45px;
    box-shadow: var(--shadow-dialog);
    transform: translateX(-105%);
    visibility: hidden;
    transition: transform 0.22s, visibility 0.22s;
  }

  .library-rail.open {
    transform: none;
    visibility: visible;
  }

  .mobile-rail-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 26px;
    font-family: var(--font-display);
    font-size: 21px;
  }

  .mobile-scrim {
    position: fixed;
    inset: 0;
    z-index: 70;
    display: block;
    background: color-mix(in oklab, var(--foreground) 35%, transparent);
  }

  .mobile-scrim[hidden] {
    display: none;
  }

  .article-main {
    padding: 36px 21px 72px;
  }
}

/* ---------- Additions: revision toggle, new-page rail button ---------- */

.revision-toggle {
  display: flex;
  align-items: center;
  gap: 7px;
  height: 34px;
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted-foreground);
  font-size: 12.5px;
  font-weight: 600;
}

.revision-toggle svg {
  width: 15px;
  height: 15px;
}

.revision-toggle:hover {
  color: var(--foreground);
  background: var(--paper-soft);
}

.revision-toggle.on {
  border-color: var(--primary);
  background: var(--accent);
  color: var(--primary);
}

.rail-new {
  color: var(--primary);
}

.rail-link.is-empty {
  color: var(--muted-foreground);
  cursor: default;
  opacity: 0.7;
}

button.rail-link {
  cursor: pointer;
}

@media (max-width: 780px) {
  .revision-toggle span {
    display: none;
  }

  .revision-toggle {
    width: 36px;
    padding: 0;
    justify-content: center;
    border-radius: 4px;
    border-color: transparent;
  }
}

/* ---------- Library tree (rail) ---------- */

.library-rail {
  display: flex;
  flex-direction: column;
  padding: 16px 0 0;
  overflow: hidden;
}

.rail-top {
  flex: none;
  padding: 0 14px 8px 16px;
}

.rail-top .rail-link {
  min-height: 30px;
  padding: 4px 8px;
}

.tree-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 14px 0 6px;
  padding: 0 4px;
}

.tree-head .rail-label {
  margin: 0;
}

.tree-tools {
  display: flex;
  gap: 2px;
}

.tree-tools button {
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--muted-foreground);
  font-size: 11.5px;
  font-weight: 600;
}

.tree-tools button:hover {
  background: var(--paper-soft);
  color: var(--primary);
}

.tree-filter {
  display: flex;
  align-items: center;
  gap: 7px;
  height: 32px;
  padding: 0 9px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--background);
  color: var(--muted-foreground);
}

.tree-filter:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--primary) 14%, transparent);
}

.tree-filter input {
  flex: 1;
  min-width: 0;
  border: 0;
  background: none;
  color: var(--foreground);
  font-family: var(--font-sans);
  font-size: 13px;
  outline: none;
}

.tree-scroll {
  flex: 1;
  min-height: 0;
  padding: 4px 10px 40px 14px;
  overflow-y: auto;
  scrollbar-width: thin;
}

.node-row {
  display: flex;
  align-items: center;
  border-radius: 5px;
}

.node-row:hover {
  background: var(--paper-soft);
}

.node-trigger {
  display: flex;
  flex: 1;
  align-items: center;
  gap: 6px;
  min-width: 0;
  min-height: 30px;
  padding: 4px 6px;
  color: var(--ink-soft);
  font-size: 13px;
  text-align: left;
}

.node-trigger svg {
  flex: none;
  width: 12px;
  height: 12px;
  color: var(--muted-foreground);
  transition: transform 0.15s;
}

.node-trigger[aria-expanded="true"] svg {
  transform: rotate(90deg);
}

.node-trigger .t,
.leaf .t {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.subject > .node-row .t {
  color: var(--foreground);
  font-weight: 700;
}

.node.on-path > .node-row .t {
  color: var(--primary);
}

.node-count {
  margin-left: auto;
  padding-left: 6px;
  color: var(--muted-foreground);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
}

.node-add {
  display: grid;
  flex: none;
  place-items: center;
  width: 24px;
  height: 24px;
  margin-right: 2px;
  border-radius: 4px;
  color: var(--muted-foreground);
  opacity: 0;
}

.node-row:hover .node-add,
.node-add:focus-visible {
  opacity: 1;
}

.node-add:hover {
  background: var(--accent);
  color: var(--primary);
}

.tree-children {
  margin: 1px 0 4px 11px;
  padding-left: 6px;
  border-left: 1px solid var(--border);
}

.tree-children[hidden] {
  display: none;
}

.leaf {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 28px;
  padding: 3px 8px;
  border-radius: 5px;
  color: var(--ink-soft);
  font-size: 13px;
}

.leaf:hover {
  background: var(--paper-soft);
  color: var(--primary);
}

.leaf.active {
  background: var(--accent);
  box-shadow: inset 2px 0 var(--primary);
  color: var(--primary);
  font-weight: 600;
}

.dot {
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--border);
}

.dot-review { background: var(--destructive); }
.dot-revised { background: var(--clinical); }

.tree :is(.node-trigger, .leaf, .node-add):focus-visible,
.tree-filter input:focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: -2px;
}

.tree-empty {
  padding: 10px 8px;
  color: var(--muted-foreground);
  font-size: 13px;
}

.rail-recent .rail-label {
  margin: 22px 0 6px 4px;
}

.rail-recent .rail-link {
  min-height: 28px;
  padding: 3px 8px;
}

@media (max-width: 1000px) {
  .library-rail {
    padding: 14px 0 0;
  }
}