/* PC-TWINS knowledge map — builds on ../assets/main.css (tokens, header, chips, cards, footer). */

:root {
  --font: "Source Sans 3", "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
  --pre: var(--hue-2);
  --post: var(--hue-3);
  --done: var(--hue-1);
}

/* Without JavaScript the theme script never runs; follow the OS setting directly. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    color-scheme: dark;
    --paper: #141919;
    --surface: #1b2222;
    --ink: #d9e0de;
    --heading: #edf2f1;
    --strong: #ffffff;
    --muted: #9ca8a6;
    --line: #2c3636;
    --line-strong: #435150;
    --dot: rgba(131, 181, 181, 0.1);
    --link: #83b5b5;
    --link-hover: #b9d6d5;
    --accent: #83b5b5;
    --header-bg: rgba(20, 25, 25, 0.84);
    --accent-soft: rgba(131, 181, 181, 0.12);
    --accent-border: rgba(131, 181, 181, 0.34);
    --media-bg: #212929;
    --hue-1: #86c0c0;
    --hue-2: #a5b1e6;
    --hue-3: #dfbd7c;
    --hue-4: #e0a6c4;
  }
}

.kmap-page {
  padding-top: 28px;
}

.kmap-page .section {
  scroll-margin-top: calc(var(--header-height) + 16px);
}

.kmap-page code {
  font-family: var(--mono);
  font-size: 0.88em;
}

.has-js [data-noscript] {
  display: none;
}

.kmap-noscript {
  color: var(--hue-4);
}

button.action-link {
  font: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
}

/* Overview ------------------------------------------------------------ */

.kmap-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin: 1.4rem 0 0;
  padding: 0;
  list-style: none;
}

.kmap-stats li {
  display: flex;
  flex-direction: column;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
  box-shadow: var(--card-shadow);
}

.kmap-stat-value {
  color: var(--heading);
  font-size: 1.6rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}

.kmap-stat-label {
  color: var(--muted);
  font-size: 0.88rem;
}

.kmap-hint {
  margin: -0.4rem 0 1rem;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.6;
}

.kmap-key {
  display: inline-block;
  padding: 0 0.45rem;
  border-radius: 6px;
  font-weight: 600;
}

.kmap-key-pre {
  color: var(--pre);
  background: color-mix(in srgb, var(--pre) 14%, transparent);
}

.kmap-key-post {
  color: var(--post);
  background: color-mix(in srgb, var(--post) 16%, transparent);
}

/* Graph + detail panel ----------------------------------------------- */

.kmap-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr);
  gap: 22px;
  align-items: start;
}

.kmap-graph,
.kmap-panel {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--card-shadow);
}

.kmap-graph {
  padding: 10px 8px;
}

.kmap-graph svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

.kmap-layer-label {
  paint-order: stroke;
  stroke: var(--surface);
  stroke-width: 5px;
  stroke-linejoin: round;
  fill: var(--muted);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.kmap-edge {
  fill: none;
  stroke: var(--line-strong);
  stroke-width: 1.3;
  opacity: 0.85;
  transition: opacity var(--motion), stroke var(--motion);
}

.kmap-edge.is-pre {
  stroke: var(--pre);
  stroke-width: 2;
  opacity: 1;
}

.kmap-edge.is-post {
  stroke: var(--post);
  stroke-width: 2;
  opacity: 1;
}

.kmap-edge.is-far {
  stroke-width: 1.3;
  opacity: 0.6;
}

.kmap-edge.is-dim {
  opacity: 0.18;
}

.kmap-arrow {
  fill: var(--line-strong);
}

.kmap-node {
  cursor: pointer;
  outline: none;
  transition: opacity var(--motion);
}

.kmap-node rect.kmap-node-box {
  fill: var(--surface);
  stroke: var(--line-strong);
  stroke-width: 1.2;
  transition: stroke var(--motion), fill var(--motion);
}

.kmap-node:hover rect.kmap-node-box,
.kmap-node:focus-visible rect.kmap-node-box {
  stroke: var(--accent);
}

.kmap-node:focus-visible rect.kmap-node-box {
  stroke-width: 2.4;
}

.kmap-node-id {
  fill: var(--accent);
  font-size: 11.5px;
  font-weight: 700;
}

.kmap-node-name {
  fill: var(--heading);
  font-size: 13px;
  font-weight: 600;
}

.kmap-node.is-sel rect.kmap-node-box {
  fill: var(--accent-soft);
  stroke: var(--accent);
  stroke-width: 2.4;
}

.kmap-node.is-pre rect.kmap-node-box {
  fill: color-mix(in srgb, var(--pre) 10%, var(--surface));
  stroke: var(--pre);
  stroke-width: 1.8;
}

.kmap-node.is-post rect.kmap-node-box {
  fill: color-mix(in srgb, var(--post) 12%, var(--surface));
  stroke: var(--post);
  stroke-width: 1.8;
}

.kmap-node.is-far rect.kmap-node-box {
  fill: var(--surface);
  stroke-width: 1.2;
  stroke-dasharray: 4 3;
}

.kmap-node.is-dim {
  opacity: 0.4;
}

.kmap-panel {
  position: sticky;
  top: calc(var(--header-height) + 16px);
  max-height: calc(100vh - var(--header-height) - 32px);
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 20px 22px 22px;
  scroll-margin-top: calc(var(--header-height) + 12px);
}

.kmap-panel:focus {
  outline: none;
}

.kmap-empty {
  margin: 0;
  color: var(--muted);
}

.kmap-panel-head {
  margin-bottom: 0.8rem;
}

.kmap-panel-id {
  display: inline-block;
  margin-right: 0.5rem;
  padding: 0.05rem 0.55rem;
  border-radius: 6px;
  color: var(--accent);
  background: var(--accent-soft);
  font-size: 0.85rem;
  font-weight: 700;
  vertical-align: 0.15em;
}

.kmap-panel h3 {
  display: inline;
  font-size: 1.3rem;
  line-height: 1.35;
}

.kmap-panel-en {
  margin: 0.25rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
  font-style: italic;
}

.kmap-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.5rem;
  margin: 0.7rem 0 0;
  padding: 0;
  list-style: none;
  font-size: 0.85rem;
}

.kmap-meta li {
  padding: 0.1rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
}

.kmap-why {
  margin: 0.9rem 0 0;
  padding: 0.7rem 0.9rem;
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
  background: var(--accent-soft);
  font-size: 0.97rem;
  line-height: 1.65;
}

.kmap-links {
  margin: 0.8rem 0 0;
  font-size: 0.9rem;
  line-height: 1.9;
}

.kmap-links-label {
  margin-right: 0.3rem;
  color: var(--muted);
}

.kmap-chip-link {
  display: inline-block;
  margin: 0 0.3rem 0.2rem 0;
  padding: 0 0.5rem;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  color: var(--link);
  background: var(--surface);
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  line-height: 1.7;
  cursor: pointer;
}

.kmap-chip-link:hover,
.kmap-chip-link:focus-visible {
  border-color: var(--accent-border);
  background: var(--accent-soft);
}

.kmap-chip-link.is-pre {
  color: var(--pre);
}

.kmap-chip-link.is-post {
  color: var(--post);
}

.kmap-panel h4 {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.6rem;
  margin: 1.4rem 0 0.6rem;
  color: var(--heading);
  font-size: 1.05rem;
}

.kmap-count {
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

/* Readings ------------------------------------------------------------ */

.kmap-readings {
  display: grid;
  gap: 0.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.kmap-reading {
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  font-size: 0.93rem;
  line-height: 1.6;
  overflow-wrap: anywhere;
}

.kmap-reading-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin-bottom: 0.35rem;
}

.kmap-tag {
  padding: 0 0.45rem;
  border: 1px solid var(--line-strong);
  border-radius: 5px;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 700;
  line-height: 1.7;
}

.kmap-tag-首读 {
  border-color: var(--accent-border);
  color: var(--accent);
  background: var(--accent-soft);
}

.kmap-tag-重要 {
  color: var(--hue-2);
}

.kmap-tag-unverified {
  border-color: color-mix(in srgb, var(--hue-3) 60%, transparent);
  color: var(--hue-3);
}

.kmap-cite {
  margin: 0;
}

.kmap-cite-title {
  color: var(--heading);
  font-weight: 600;
}

.kmap-cite-venue {
  color: var(--muted);
}

.kmap-reading p {
  margin: 0.3rem 0 0;
}

.kmap-reading-part::before {
  content: "读：";
  color: var(--muted);
  font-weight: 600;
}

.kmap-reading-why::before {
  content: "为什么：";
  color: var(--muted);
  font-weight: 600;
}

.kmap-reading-note {
  color: var(--hue-3);
  font-size: 0.86rem;
}

.kmap-reading-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.45rem;
}

.kmap-reading-links .action-link {
  min-height: 24px;
  padding: 0 0.55rem;
  font-size: 0.78rem;
}

/* Terms (panel + glossary) ------------------------------------------- */

.kmap-terms,
.kmap-term-grid {
  margin: 0;
}

.kmap-term {
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--line);
}

.kmap-term:last-child {
  border-bottom: 0;
}

.kmap-term dt {
  color: var(--heading);
  font-weight: 700;
  line-height: 1.45;
  overflow-wrap: anywhere;
}

.kmap-term-en {
  margin-left: 0.45rem;
  color: var(--muted);
  font-weight: 500;
  font-style: italic;
}

.kmap-term dd {
  margin: 0.15rem 0 0;
  font-size: 0.94rem;
  line-height: 1.6;
}

.kmap-term-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 28px;
  padding: 6px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--card-shadow);
}

.kmap-term-grid .kmap-term:nth-last-child(2):nth-child(odd) {
  border-bottom: 0;
}

.kmap-term-grid .kmap-chip-link {
  margin: 0 0 0 0.4rem;
  font-size: 0.75rem;
  line-height: 1.55;
  vertical-align: 0.1em;
}

.kmap-term-grid mark {
  border-radius: 3px;
  color: inherit;
  background: color-mix(in srgb, var(--hue-3) 30%, transparent);
}

.kmap-glossary-empty {
  grid-column: 1 / -1;
  margin: 0.8rem 0;
  color: var(--muted);
}

.kmap-search {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.8rem;
  margin-bottom: 1rem;
}

.kmap-search-label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.kmap-search-input {
  flex: 1 1 260px;
  min-width: 0;
  max-width: 460px;
  min-height: 40px;
  padding: 0.35rem 0.9rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--ink);
  background: var(--surface);
  font: inherit;
  font-size: 0.95rem;
}

.kmap-search-input:focus {
  border-color: var(--accent);
  outline: 2px solid var(--focus-ring);
  outline-offset: 1px;
}

.kmap-search-count {
  color: var(--muted);
  font-size: 0.88rem;
}

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

@media (max-width: 980px) {
  .kmap-layout {
    grid-template-columns: 1fr;
  }

  .kmap-panel {
    position: static;
    max-height: none;
    overflow: visible;
  }

  .kmap-term-grid {
    grid-template-columns: 1fr;
  }

  .kmap-term-grid .kmap-term:nth-last-child(2):nth-child(odd) {
    border-bottom: 1px solid var(--line);
  }
}

@media (max-width: 560px) {
  .kmap-page {
    padding-top: 16px;
  }

  .kmap-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }

  .kmap-stats li {
    padding: 10px 14px;
  }

  .kmap-stat-value {
    font-size: 1.35rem;
  }

  .kmap-graph {
    padding: 8px 4px;
  }

  .kmap-panel {
    padding: 16px 14px;
  }

  .kmap-term-grid {
    padding: 4px 14px;
  }
}

/* Knowledge card: concepts and key results ---------------------------- */

.kmap-concepts {
  margin: 0;
  padding-left: 1.2rem;
  line-height: 1.7;
}

.kmap-concepts li + li {
  margin-top: 0.35rem;
}

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

.kmap-result {
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--line);
}

.kmap-result:last-child {
  border-bottom: 0;
}

.kmap-result-name {
  margin: 0;
  color: var(--heading);
  font-weight: 700;
}

.kmap-formula {
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
}

.kmap-formula .katex-display {
  margin: 0.4rem 0;
}

.kmap-result-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.kmap-panel .katex,
.kmap-term-grid .katex {
  font-size: 1.05em;
}