.knowledge-home {
  --kv-green: #2f6f5e;
  --kv-green-soft: #eaf4ef;
  --kv-blue: #315f88;
  --kv-blue-soft: #edf4fa;
  --kv-amber: #a16a16;
  --kv-ink: #17201b;
  --kv-muted: #62706a;
  --kv-line: #d8dfd9;
  max-width: 1180px;
  margin: 0 auto;
  color: var(--kv-ink);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0 16px;
}

.knowledge-home:has(.knowledge-detail:not([hidden])) {
  grid-template-columns: minmax(0, 1fr) 320px;
}
.knowledge-home-header { grid-column: 1 / -1; }
.knowledge-home-content { grid-column: 1; }

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

.knowledge-home-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 14px;
}

.knowledge-kicker,
.knowledge-detail-head p {
  margin: 0 0 4px;
  color: var(--kv-green);
  font-size: 13px;
  font-weight: 850;
}

.knowledge-home-header h2 {
  margin: 0;
  font-size: 26px;
  line-height: 1.2;
}

.knowledge-current {
  max-width: 420px;
  margin: 0;
  color: var(--kv-muted);
  line-height: 1.5;
  text-align: right;
}

.knowledge-current-wrap {
  display: grid;
  justify-items: end;
  gap: 6px;
}
.knowledge-current-wrap button {
  min-height: 36px;
  color: var(--kv-blue);
  font-weight: 780;
}
.knowledge-resume-error {
  max-width: 420px;
  padding: 10px 12px;
  border: 1px solid #d2a58f;
  border-left: 5px solid #a34d32;
  border-radius: 6px;
  background: #fff3ef;
  color: #713522;
}
.knowledge-resume-error p { margin: 0; line-height: 1.5; }
.knowledge-resume-error button { min-height: 44px; margin-top: 6px; }

.knowledge-home-content {
  min-width: 0;
}

.knowledge-state-panel {
  min-height: 220px;
  padding: 28px;
  border: 1px solid var(--kv-line);
  border-radius: 8px;
  background: #fbfcf9;
}
.knowledge-state-panel h3 { margin: 0 0 8px; font-size: 20px; }
.knowledge-state-panel p { margin: 0; color: var(--kv-muted); line-height: 1.6; }
.knowledge-state-panel button { min-height: 44px; margin-top: 18px; }
.knowledge-state-panel:not([hidden])[data-state="skeleton"] {
  background: #f4f7f5;
}

.knowledge-start-panel {
  margin-bottom: 18px;
  padding: 18px;
  border: 1px solid var(--kv-line);
  border-radius: 8px;
  background: #fbfcf9;
  box-shadow: 0 8px 24px rgba(23, 32, 27, .06);
}

.knowledge-start-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}
.knowledge-start-head p,
.knowledge-map-heading p {
  margin: 0 0 3px;
  color: var(--kv-green);
  font-size: 12px;
  font-weight: 850;
}
.knowledge-start-head h3,
.knowledge-map-heading h3 {
  margin: 0;
  font-size: 18px;
  line-height: 1.25;
}

.knowledge-start-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}
.knowledge-start-card {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 10px;
  min-height: 148px;
  padding: 14px;
  border: 1px solid var(--kv-line);
  border-left-width: 5px;
  border-radius: 8px;
  background: #fff;
  color: var(--kv-ink);
  text-align: left;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(23, 32, 27, .06);
}
.knowledge-start-card:hover,
.knowledge-start-card:focus-visible {
  border-color: var(--kv-blue);
  box-shadow: 0 0 0 3px rgba(49, 95, 136, .12);
}
.knowledge-start-card.state-stable { border-left-color: #2f6f5e; }
.knowledge-start-card.state-developing { border-left-color: #315f88; }
.knowledge-start-card.state-needs_support { border-left-color: #a16a16; }
.knowledge-start-card.state-needs_prerequisite { border-left-color: #934a54; }
.knowledge-start-card.state-untested { border-left-color: #7a8580; }
.knowledge-start-rank {
  display: inline-grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--kv-green-soft);
  color: #214f43;
  font-weight: 900;
}
.knowledge-start-main {
  display: grid;
  min-width: 0;
  gap: 4px;
}
.knowledge-start-main strong {
  overflow-wrap: anywhere;
  font-size: 17px;
  line-height: 1.25;
}
.knowledge-start-main small,
.knowledge-start-main span {
  color: var(--kv-muted);
  line-height: 1.35;
}
.knowledge-start-main span {
  display: -webkit-box;
  overflow: hidden;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}
.knowledge-start-action {
  grid-column: 2;
  justify-self: start;
  align-self: end;
  min-height: 32px;
  padding: 7px 10px;
  border-radius: 8px;
  background: var(--kv-blue-soft);
  color: var(--kv-blue);
  font-size: 13px;
  font-weight: 850;
}

.knowledge-map-explorer {
  margin-top: 6px;
  border-top: 1px solid var(--kv-line);
  padding-top: 14px;
}

.knowledge-map-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 2px 0 10px;
  padding-top: 2px;
}

.knowledge-map-heading button {
  min-height: 44px;
  padding: 0 14px;
  border: 1px solid var(--kv-line);
  border-radius: 8px;
  background: #fff;
  color: var(--kv-blue);
  font-weight: 850;
  cursor: pointer;
}

.knowledge-map-heading button:hover,
.knowledge-map-heading button:focus-visible {
  border-color: var(--kv-blue);
  box-shadow: 0 0 0 3px rgba(49, 95, 136, .12);
}

.knowledge-toolbar {
  display: grid;
  grid-template-columns: minmax(260px, 1fr) 150px 170px;
  gap: 10px;
  align-items: end;
  margin-bottom: 10px;
}

.knowledge-view-switch {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  min-height: 44px;
  border: 1px solid var(--kv-line);
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
}

.knowledge-view-switch label {
  position: relative;
  min-width: 0;
  cursor: pointer;
}

.knowledge-view-switch input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  opacity: 0;
  cursor: pointer;
}

.knowledge-view-switch span {
  display: flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border-right: 1px solid var(--kv-line);
  color: var(--kv-muted);
  font-size: 15px;
  font-weight: 800;
}

.knowledge-view-switch label:last-child span { border-right: 0; }
.knowledge-view-switch input:checked + span {
  background: var(--kv-green-soft);
  color: #214f43;
  box-shadow: inset 0 -3px 0 var(--kv-green);
}
.knowledge-view-switch input:focus-visible + span {
  outline: 3px solid rgba(47, 111, 94, .3);
  outline-offset: -3px;
}

.knowledge-search,
.knowledge-filter,
.knowledge-module-filter {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.knowledge-search > label,
.knowledge-filter > span,
.knowledge-module-filter > span {
  color: var(--kv-muted);
  font-size: 12px;
  font-weight: 800;
}

.knowledge-search > div {
  position: relative;
}

.knowledge-search input,
.knowledge-filter select,
.knowledge-module-filter select {
  min-height: 44px;
  width: 100%;
  padding: 0 42px 0 12px;
  border: 1px solid var(--kv-line);
  border-radius: 8px;
  background: #fff;
  color: var(--kv-ink);
}

.knowledge-filter select { padding-right: 10px; }
.knowledge-module-filter select { padding: 0 10px; }
.knowledge-search button {
  position: absolute;
  right: 2px;
  top: 2px;
  width: 40px;
  min-height: 40px;
  padding: 0;
  border: 0;
  background: transparent;
  font-size: 22px;
}

.knowledge-detail-close {
  min-width: 44px;
  min-height: 44px;
  padding: 0;
  font-size: 21px;
  font-weight: 800;
}

.knowledge-result-summary {
  min-height: 24px;
  color: var(--kv-muted);
  font-size: 13px;
}
.knowledge-result-summary button {
  min-height: 32px;
  margin-left: 8px;
  color: var(--kv-blue);
  font-weight: 800;
}

.knowledge-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin: 2px 0 8px;
  color: var(--kv-muted);
  font-size: 12px;
}
.knowledge-legend span { display: inline-flex; align-items: center; gap: 5px; }
.legend-state { color: var(--kv-green); }
.legend-edge { color: var(--kv-blue); font-style: normal; font-size: 18px; }
.legend-outgoing-icon { color: var(--kv-green); font-style: normal; font-size: 18px; }
.legend-bridge { color: var(--kv-amber); }
.legend-bridge i { font-style: normal; font-size: 18px; }

.knowledge-workspace {
  min-width: 0;
}

.knowledge-viewport {
  position: relative;
  min-height: 0;
  height: auto;
  max-height: none;
  overflow: visible;
  overscroll-behavior: auto;
  touch-action: auto;
  border: 1px solid var(--kv-line);
  border-radius: 8px;
  background: #fbfcf9;
}

.knowledge-world {
  position: relative;
  min-width: 100%;
  min-height: 0;
  padding: 16px;
  transform-origin: 0 0;
  transition: none;
}

.mind-map-world {
  display: block;
}

.mind-module-root-list {
  display: block;
  column-width: 300px;
  column-gap: 14px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.mind-module-branch {
  display: inline-block;
  width: 100%;
  box-sizing: border-box;
  break-inside: avoid;
  page-break-inside: avoid;
  margin: 0 0 14px;
  min-width: 0;
  border: 1px solid var(--kv-line);
  border-radius: 8px;
  padding: 14px;
  background: #fff;
  box-shadow: 0 4px 14px rgba(23, 32, 27, .05);
}

.mind-module-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin: 0 0 12px;
  padding: 0 0 10px;
  border-bottom: 1px solid var(--kv-line);
  font-weight: 850;
  color: var(--kv-ink);
  font-size: 16px;
  line-height: 1.3;
}

.mind-module-count {
  flex: 0 0 auto;
  color: var(--kv-muted);
  font-size: 12px;
  font-weight: 750;
}

.mind-module-list,
.mind-search-results {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.mind-search-results {
  grid-column: 1 / -1;
  grid-template-columns: repeat(auto-fit, minmax(176px, 1fr));
}

.knowledge-node-button {
  width: 100%;
  min-height: 44px;
  padding: 8px 10px;
  border: 1px solid var(--kv-line);
  border-radius: 8px;
  background: #fff;
  color: var(--kv-ink);
  text-align: left;
  line-height: 1.35;
  font-size: 15px;
  font-weight: 720;
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  grid-template-rows: auto auto;
  gap: 6px;
  align-items: center;
  border-left-width: 5px;
}

.knowledge-state-icon {
  grid-row: 1 / 3;
  display: inline-grid;
  place-items: center;
  width: 20px;
  height: 20px;
  border: 1px solid currentColor;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 900;
}
.knowledge-node-label { min-width: 0; }
.knowledge-node-state {
  grid-column: 2;
  min-width: 0;
  color: var(--kv-muted);
  font-size: 11px;
  font-weight: 700;
  line-height: 1.15;
}
.knowledge-node-button.state-stable { border-left-color: #2f6f5e; background: #f4faf7; }
.knowledge-node-button.state-developing { border-left-color: #315f88; background: #f4f8fb; }
.knowledge-node-button.state-needs_support { border-left-color: #a16a16; border-style: solid dashed solid solid; background: #fff9ee; }
.knowledge-node-button.state-needs_prerequisite { border-left-color: #934a54; border-style: double solid solid solid; background: #fff5f6; }
.knowledge-node-button.state-untested { border-left-color: #7a8580; border-style: dotted solid solid solid; }

.knowledge-node-button:hover { border-color: var(--kv-blue); }
.knowledge-node-button:focus-visible,
.mind-module-heading:focus-visible {
  outline: 3px solid #0b6ed0;
  outline-offset: 2px;
}
.knowledge-node-button.is-selected {
  border-color: var(--kv-green);
  box-shadow: 0 0 0 3px rgba(47, 111, 94, .2);
  background: var(--kv-green-soft);
}
.knowledge-node-recommendation {
  display: block;
  grid-column: 2;
  margin-top: 3px;
  color: var(--kv-amber);
  font-size: 12px;
}

.graph-world {
  overflow: visible;
}

.graph-node-button {
  position: absolute;
  z-index: 3;
  width: 148px;
  height: 48px;
  min-height: 48px;
  box-sizing: border-box;
  overflow: hidden;
  text-align: center;
  box-shadow: 0 4px 12px rgba(23, 32, 27, .08);
  padding: 3px 7px;
}
.graph-node-button .knowledge-node-label {
  overflow: hidden;
  font-size: 14px;
  line-height: 1.05;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}
.graph-node-button .knowledge-node-state {
  overflow: hidden;
  font-size: 10px;
  line-height: 1.05;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.graph-node-button.is-recommended::after { display: none; }
.graph-node-button.graph-overview-callout {
  z-index: 4;
  width: 148px;
  height: 48px;
  transform: scale(var(--kv-inverse-scale, 1));
  transform-origin: center;
}
.graph-node-button.graph-overview-callout .knowledge-node-label {
  font-size: 13px;
}

.graph-overview-marker {
  position: absolute;
  z-index: 3;
  width: 44px;
  height: 44px;
  min-width: 44px;
  min-height: 44px;
  padding: 0;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: inherit;
  cursor: pointer;
  transform: scale(var(--kv-inverse-scale, 1));
  transform-origin: center;
}
.graph-overview-marker::before {
  content: "";
  position: absolute;
  top: 11px;
  left: 11px;
  width: 22px;
  height: 22px;
  box-sizing: border-box;
  border: 2px solid #56635c;
  border-radius: 7px;
  background: #f0f2f1;
  box-shadow: 0 0 0 3px rgba(255, 255, 255, .8);
}
.graph-overview-marker.state-stable::before {
  border-color: var(--kv-blue);
  background: #eaf1f8;
}
.graph-overview-marker.state-developing::before {
  border-color: var(--kv-green);
  border-radius: 4px 8px 8px 4px;
  background: var(--kv-green-soft);
}
.graph-overview-marker.state-needs_support::before {
  border-color: var(--kv-amber);
  border-style: dashed;
  border-radius: 5px;
  background: #fff4d6;
}
.graph-overview-marker.state-needs_prerequisite::before {
  border-color: #6b4e7a;
  border-radius: 5px;
  background: #f3edf6;
  transform: rotate(45deg);
}
.graph-overview-marker.is-context,
.graph-overview-marker.is-filtered { opacity: .24; }
.graph-overview-marker.is-callout::before { box-shadow: 0 0 0 4px rgba(19, 63, 104, .28); }
.graph-overview-marker.is-selected::before { border-width: 3px; border-color: #173f68; }
.graph-overview-marker:hover::before,
.graph-overview-marker:focus-visible::before {
  border-color: #173f68;
  box-shadow: 0 0 0 4px rgba(19, 63, 104, .22);
}
.graph-overview-marker:focus-visible {
  outline: 3px solid #0b6ed0;
  outline-offset: 2px;
}
.graph-overview-marker:hover::after,
.graph-overview-marker:focus-visible::after,
.graph-overview-marker.is-selected::after {
  content: attr(data-label);
  position: absolute;
  z-index: 6;
  left: 50%;
  bottom: calc(100% + 4px);
  width: max-content;
  max-width: 150px;
  padding: 3px 6px;
  border: 1px solid #c7d4dd;
  border-radius: 6px;
  background: #fff;
  color: #263d4b;
  font-size: 12px;
  font-weight: 800;
  line-height: 1.25;
  text-align: center;
  transform: translateX(-50%);
  box-shadow: 0 4px 12px rgba(23, 32, 27, .12);
}
.graph-overview-anchor-layer {
  position: absolute;
  inset: 0;
  z-index: 5;
  overflow: hidden;
  pointer-events: none;
}
.graph-overview-anchor {
  position: absolute;
  width: 148px;
  box-sizing: border-box;
  padding: 3px 6px;
  color: #263d4b;
  font-size: 14px;
  font-weight: 820;
  line-height: 1.25;
  text-wrap: pretty;
  pointer-events: none;
}
.graph-overview-anchor::before {
  content: "";
  position: absolute;
  top: 50%;
  width: 12px;
  border-top: 1px solid #718896;
}
.graph-overview-anchor.is-right::before { right: 100%; }
.graph-overview-anchor.is-left { text-align: right; }
.graph-overview-anchor.is-left::before { left: 100%; }
.graph-overview-fallback {
  position: absolute;
  z-index: 5;
  top: 18px;
  left: 50%;
  width: 260px;
  margin: 0;
  color: var(--kv-muted);
  font-size: 14px;
  font-weight: 750;
  text-align: center;
  transform: translateX(-50%) scale(var(--kv-inverse-scale, 1));
  transform-origin: center top;
}

.graph-lane-label {
  position: absolute;
  left: 10px;
  z-index: 2;
  max-width: 120px;
  color: var(--kv-muted);
  font-size: 12px;
  font-weight: 800;
}

.graph-relationships {
  position: absolute;
  inset: 0;
  z-index: 1;
  width: 100%;
  height: 100%;
  overflow: visible;
  pointer-events: none;
}

.graph-edge {
  stroke: #718896;
  stroke-width: 2;
  vector-effect: non-scaling-stroke;
}
.graph-edge[data-relation="strict-prerequisite"] { stroke-linecap: round; }
.graph-edge.is-overview { opacity: .34; stroke-width: 1.5; }
.graph-edge.is-bridge {
  stroke: var(--kv-amber);
  stroke-dasharray: 5 4;
  opacity: .45;
}
.graph-edge.is-related { opacity: .72; }
.graph-edge.is-incoming {
  stroke: var(--kv-blue);
  stroke-width: 3;
  opacity: 1;
}
.graph-edge.is-outgoing {
  stroke: var(--kv-green);
  stroke-width: 3;
  opacity: 1;
}
#kv51-arrow path { fill: #526d7c; }
#kv51-arrow-incoming path { fill: var(--kv-blue); }
#kv51-arrow-outgoing path { fill: var(--kv-green); }
#kv51-arrow-bridge path { fill: var(--kv-amber); }

.knowledge-detail {
  position: sticky;
  z-index: 10;
  top: 16px;
  grid-column: 2;
  align-self: start;
  width: 320px;
  max-height: calc(100vh - 32px);
  overflow: auto;
  padding: 16px;
  border: 1px solid var(--kv-line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 8px 24px rgba(24, 33, 28, .14);
}

.knowledge-detail-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
}
.knowledge-detail-head h3 {
  margin: 0;
  font-size: 22px;
  line-height: 1.25;
}
.knowledge-state-label {
  display: inline-flex;
  margin: 12px 0 8px;
  padding: 5px 8px;
  border-radius: 6px;
  background: var(--kv-green-soft);
  color: #214f43;
  font-weight: 780;
}
.knowledge-essence {
  margin: 6px 0 14px;
  line-height: 1.65;
}
.knowledge-readiness {
  margin: 4px 0 12px;
  padding: 10px 12px;
  border-left: 4px solid var(--kv-amber);
  background: #fff8e8;
}
.knowledge-readiness strong,
.knowledge-readiness p { margin: 0; }
.knowledge-readiness p { margin-top: 3px; color: #654713; line-height: 1.5; }
.knowledge-activity,
.knowledge-mastery,
.knowledge-learning-card {
  padding: 10px 0;
  border-top: 1px solid var(--kv-line);
}
.knowledge-detail-section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.knowledge-activity h4,
.knowledge-mastery h4,
.knowledge-mastery p { margin: 0; }
.knowledge-activity h4,
.knowledge-mastery h4 { font-size: 14px; }
.knowledge-detail-section-head span { color: var(--kv-muted); font-weight: 800; }
.knowledge-activity-segments {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 5px;
  margin-top: 8px;
}
.knowledge-activity-segments i {
  height: 7px;
  border-radius: 2px;
  background: #d9dfdc;
}
.knowledge-activity-segments i.is-complete { background: var(--kv-green); }
.knowledge-mastery p { margin-top: 4px; color: var(--kv-muted); line-height: 1.55; }
.knowledge-learning-card {
  display: grid;
  gap: 8px;
  margin: 10px 0 2px;
  padding: 12px;
  border: 1px solid #cfdcd4;
  border-left: 5px solid var(--kv-green);
  border-radius: 8px;
  background: linear-gradient(180deg, #f8fcfa, #fff);
}
.knowledge-card-preview-main {
  display: grid;
  gap: 3px;
}
.knowledge-card-preview-main > span {
  color: var(--kv-green);
  font-size: 12px;
  font-weight: 850;
}
.knowledge-card-preview-main strong {
  line-height: 1.45;
  font-size: 16px;
}
.knowledge-card-preview-main p,
.knowledge-card-preview-note,
.knowledge-card-preview-mode {
  margin: 0;
  color: var(--kv-muted);
  line-height: 1.6;
}
.knowledge-card-preview-note {
  padding: 8px 10px;
  border-radius: 6px;
  background: var(--kv-green-soft);
  color: #214f43;
  font-weight: 720;
}
.knowledge-card-preview-mode {
  font-size: 12px;
  font-weight: 760;
}
.knowledge-card-forms {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.knowledge-card-forms i {
  padding: 4px 7px;
  border-radius: 6px;
  background: var(--kv-blue-soft);
  color: var(--kv-blue);
  font-size: 12px;
  font-style: normal;
  font-weight: 820;
}
.knowledge-relations {
  display: grid;
  gap: 10px;
}
.knowledge-relations section {
  padding-top: 10px;
  border-top: 1px solid var(--kv-line);
}
.knowledge-relations h4,
.knowledge-relations p { margin: 0; }
.knowledge-relations h4 { margin-bottom: 4px; font-size: 14px; }
.knowledge-relations p { color: var(--kv-muted); line-height: 1.55; }
.knowledge-detail-actions {
  display: grid;
  gap: 8px;
  margin-top: 14px;
}
.knowledge-detail-actions p {
  margin: 0;
  color: var(--kv-muted);
  line-height: 1.55;
}
.knowledge-action-status {
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid #aebfca;
  border-left: 5px solid #315f88;
  border-radius: 6px;
  background: #f4f8fb;
  color: #24465e !important;
  font-weight: 750;
}
.knowledge-action-status[data-feedback-kind="success"] {
  border-left-color: #2f6f5e;
  background: #eef8f3;
  color: #214f43 !important;
}
.knowledge-action-status[data-feedback-kind="waiting"] {
  border-left-color: #8a641e;
  background: #fff8e8;
  color: #654713 !important;
}
.knowledge-action-status[data-feedback-kind="recovery"] {
  border-left-color: #a34d32;
  background: #fff3ef;
  color: #713522 !important;
}
.knowledge-live-region {
  position: fixed;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

@media (min-width: 701px) {
  .knowledge-home:has(.knowledge-detail:not([hidden])) .knowledge-toolbar {
    grid-template-columns: 190px minmax(180px, 1fr) 150px;
  }
  .knowledge-home:has(.knowledge-detail:not([hidden])) .knowledge-module-filter {
    grid-column: 1 / 3;
  }
}

@media (max-width: 900px) {
  .knowledge-toolbar {
    grid-template-columns: 180px minmax(180px, 1fr) 150px;
  }
  .knowledge-module-filter { grid-column: 1 / 3; }
  .mind-module-root-list { column-width: 240px; }
}

@media (max-width: 700px) {
  .main { padding-inline: 12px; }
  .topbar {
    flex-direction: row;
    align-items: flex-start;
    justify-content: space-between;
    gap: 8px;
  }
  .topbar-actions { flex-shrink: 0; }
  .knowledge-home-header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: start;
    gap: 6px 10px;
    margin-bottom: 10px;
  }
  .knowledge-home-header > div:first-child { min-width: 0; }
  .knowledge-home-header h2 { font-size: 22px; }
  .knowledge-current {
    max-width: 150px;
    margin-top: 0;
    text-align: right;
    font-size: 12px;
  }
  .knowledge-current-wrap { justify-items: end; }
  .knowledge-current-wrap:has(.knowledge-resume-error:not([hidden])) {
    grid-column: 1 / -1;
    grid-row: 2;
    width: 100%;
    justify-items: stretch;
  }
  .knowledge-current-wrap:has(.knowledge-resume-error:not([hidden])) .knowledge-current {
    max-width: none;
    text-align: left;
  }
  .knowledge-current-wrap:has(.knowledge-resume-error:not([hidden])) > [data-resume-learning] {
    width: 100%;
  }
  .knowledge-resume-error {
    width: 100%;
    max-width: none;
    box-sizing: border-box;
  }
  .knowledge-resume-error button { width: 100%; }
  .knowledge-toolbar {
    grid-template-columns: minmax(0, 1fr) 132px;
    gap: 8px;
  }
  .knowledge-search { grid-column: 1; }
  .knowledge-filter { grid-column: 2; }
  .knowledge-module-filter { grid-column: 1 / -1; }
  .knowledge-search > label,
  .knowledge-filter > span,
  .knowledge-module-filter > span { position: absolute; width: 1px; height: 1px; overflow: hidden; }
  .knowledge-start-panel {
    padding: 12px;
    margin-bottom: 12px;
  }
  .knowledge-start-cards {
    grid-template-columns: minmax(0, 1fr);
  }
  .knowledge-start-card {
    min-height: 108px;
  }
  .knowledge-map-heading {
    align-items: stretch;
    flex-direction: column;
  }
  .knowledge-map-heading button {
    width: 100%;
  }
  .knowledge-map-heading h3,
  .knowledge-start-head h3 {
    font-size: 17px;
  }
  .knowledge-result-summary { font-size: 12px; }
  .knowledge-viewport {
    min-height: 0;
    height: auto;
    max-height: none;
  }
  .mind-map-world { padding: 12px; }
  .mind-module-root-list { column-count: 1; column-width: auto; }
  .knowledge-node-button { font-size: 15px; }
  .graph-node-button .knowledge-node-label { font-size: 15px; }
  .graph-node-button.graph-overview-callout {
    height: 58px;
    min-height: 58px;
    transform: none;
  }
  .graph-node-button.graph-overview-callout .knowledge-node-label {
    font-size: 13px;
  }
  .knowledge-detail {
    position: fixed;
    z-index: 40;
    top: auto;
    right: 0;
    bottom: 0;
    left: 0;
    width: 100%;
    max-height: min(68dvh, calc(100dvh - 112px));
    border-radius: 8px 8px 0 0;
    padding: 16px 16px max(18px, env(safe-area-inset-bottom));
  }
  .knowledge-detail-head {
    position: sticky;
    top: -16px;
    z-index: 2;
    margin: -16px -16px 8px;
    padding: 14px 16px 10px;
    background: #fff;
    border-bottom: 1px solid var(--kv-line);
  }
  .knowledge-detail-actions {
    position: sticky;
    bottom: calc(-1 * max(18px, env(safe-area-inset-bottom)));
    z-index: 2;
    margin: 14px -16px calc(-1 * max(18px, env(safe-area-inset-bottom)));
    padding: 12px 16px max(18px, env(safe-area-inset-bottom));
    background: #fff;
    border-top: 1px solid var(--kv-line);
  }
  .knowledge-detail-actions button { width: 100%; min-height: 44px; }
  .knowledge-home,
  .knowledge-home:has(.knowledge-detail:not([hidden])) {
    display: block;
  }
}

@media (prefers-reduced-motion: reduce) {
  .knowledge-detail { transition: none; }
}