/*
 * 202ch arrangement note panel.
 * Every selector is scoped to the panel. Site and shared note colors are
 * inherited; board image pixels and the existing search controls stay intact.
 */

.darts-note-panel {
  --dnp-surface: var(--site-surface, var(--darts-article-background, #fbfcfd));
  --dnp-soft: var(--site-soft, var(--darts-article-inset, #e8eff4));
  --dnp-selected: var(--site-selected, var(--darts-article-inset, #dce8f1));
  --dnp-ink: var(--site-ink, var(--darts-article-foreground, #293e50));
  --dnp-muted: var(--site-muted, var(--darts-article-muted, #4b6375));
  --dnp-line: var(--site-line, var(--darts-article-border, #becedb));
  --dnp-accent: var(--site-accent, var(--darts-link, #456b87));
  --dnp-link: var(--site-link, var(--darts-link, #355f80));
  --dnp-focus: var(--site-focus, var(--darts-link, #9b6528));

  box-sizing: border-box;
  container-type: inline-size;
  container-name: darts-note-panel;
  width: 100%;
  min-width: 0;
  max-width: 100%;
  margin: 0.75rem 0;
  border: 1px solid var(--dnp-line);
  border-radius: 1rem;
  background: var(--dnp-surface);
  color: var(--dnp-ink);
  font-family: inherit;
  font-size: 1rem;
  line-height: 1.75;
  text-align: start;
  overflow-wrap: anywhere;
}

.darts-note-panel *,
.darts-note-panel *::before,
.darts-note-panel *::after {
  box-sizing: border-box;
}

.darts-note-panel[hidden],
.darts-note-panel [hidden] {
  display: none !important;
}

.darts-note-panel .darts-note-panel__header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.2rem 0.75rem;
  padding: 0.85rem 1rem 0;
}

.darts-note-panel .darts-note-panel__title {
  min-width: 0;
  margin: 0;
  color: var(--dnp-ink);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
}

.darts-note-panel .darts-note-panel__candidate {
  margin: 0;
  color: var(--dnp-muted);
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1.5;
}

.darts-note-panel .darts-note-panel__summary {
  margin: 0;
  padding: 0.65rem 1rem 0.95rem;
  color: var(--dnp-ink);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.85;
  white-space: pre-line;
}

.darts-note-panel .darts-note-panel__summary p {
  margin: 0 0 0.6em;
}

.darts-note-panel .darts-note-panel__summary p:last-child {
  margin-bottom: 0;
}

.darts-note-panel .darts-note-panel__details {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
  border-top: 1px solid var(--dnp-line);
  border-radius: 0;
  background: transparent;
  color: var(--dnp-ink);
}

.darts-note-panel .darts-note-panel__disclosure {
  display: flex;
  min-height: 44px;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin: 0;
  padding: 0.7rem 1rem;
  border: 0;
  background: transparent;
  color: var(--dnp-ink);
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 700;
  line-height: 1.55;
  list-style: none;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.darts-note-panel .darts-note-panel__disclosure::-webkit-details-marker {
  display: none;
}

.darts-note-panel .darts-note-panel__disclosure::after {
  content: "";
  flex: 0 0 0.5rem;
  width: 0.5rem;
  height: 0.5rem;
  margin-right: 0.15rem;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  transition: transform 140ms ease;
}

.darts-note-panel
  .darts-note-panel__details[open]
  > .darts-note-panel__disclosure::after {
  transform: rotate(225deg);
}

.darts-note-panel .darts-note-panel__figures {
  min-width: 0;
  padding: 0 1rem 1rem;
}

.darts-note-panel .darts-note-panel__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  min-width: 0;
  margin: 0 1rem 0.9rem;
  padding: 0;
}

.darts-note-panel .darts-note-panel__tab {
  display: flex;
  flex: 1 1 0;
  align-items: center;
  justify-content: center;
  min-width: 0;
  min-height: 44px;
  margin: 0;
  padding: 0.5rem 0.25rem;
  border: 1px solid var(--dnp-line);
  border-radius: 0.55rem;
  background: var(--dnp-surface);
  color: var(--dnp-muted);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.45;
  text-align: center;
  white-space: normal;
  overflow-wrap: anywhere;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition:
    background-color 120ms ease,
    border-color 120ms ease;
}

.darts-note-panel .darts-note-panel__tab[aria-selected="true"] {
  border-color: var(--dnp-accent);
  background: var(--dnp-selected);
  color: var(--dnp-ink);
  font-weight: 700;
  box-shadow: inset 0 0 0 1px var(--dnp-accent);
}

.darts-note-panel .darts-note-panel__tab:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

/* Four diagrams use two columns until the panel has room for four full labels.
 * Older browsers keep the readable two-column layout without a polyfill. */
.darts-note-panel .darts-note-panel__tab:first-child:nth-last-child(4),
.darts-note-panel
  .darts-note-panel__tab:first-child:nth-last-child(4)
  ~ .darts-note-panel__tab {
  flex-basis: calc(50% - 0.1875rem);
}

@container darts-note-panel (min-width: 31.25rem) {
  .darts-note-panel .darts-note-panel__tab:first-child:nth-last-child(4),
  .darts-note-panel
    .darts-note-panel__tab:first-child:nth-last-child(4)
    ~ .darts-note-panel__tab {
    flex-basis: calc(25% - 0.28125rem);
  }
}

.darts-note-panel .darts-note-panel__figure {
  min-width: 0;
  margin: 0;
  padding: 0;
}

.darts-note-panel .darts-note-panel__figure-title {
  margin: 0 0 0.5rem;
  color: var(--dnp-ink);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 650;
  line-height: 1.6;
}

.darts-note-panel .darts-note-panel__image {
  display: block;
  width: 100%;
  max-width: 32rem;
  height: auto;
  margin: 0 auto;
  padding: 0;
  border: 0;
  background: transparent;
  object-fit: contain;
}

.darts-note-panel .darts-note-panel__caption {
  margin: 0.75rem 0 0;
  color: var(--dnp-muted);
  font-size: 0.875rem;
  font-weight: 400;
  line-height: 1.75;
  white-space: pre-line;
}

.darts-note-panel .darts-note-panel__sequence {
  margin: 0.6rem 0 0;
  color: var(--dnp-muted);
  font-size: 0.8125rem;
  font-weight: 400;
  line-height: 1.65;
}

.darts-note-panel .darts-note-panel__legend {
  display: grid;
  gap: 0.35rem;
  margin: 0.65rem 0 0;
  padding: 0;
  color: var(--dnp-muted);
  font-size: 0.8125rem;
  font-weight: 400;
  line-height: 1.65;
  list-style: none;
}

.darts-note-panel .darts-note-panel__legend-item {
  display: flex;
  align-items: center;
  gap: 0.65em;
  min-width: 0;
  margin: 0;
  padding: 0;
}

.darts-note-panel .darts-note-panel__legend-key {
  display: inline-block;
  flex: 0 0 1.4em;
  width: 1.4em;
  height: 0;
  border-top: 3px solid #347ab0;
}

.darts-note-panel .darts-note-panel__legend-key--yellow {
  border-top-width: 6px;
  border-top-color: #f4c400;
  box-shadow: 0 0 0 1px #907b30;
}

.darts-note-panel .darts-note-panel__footer {
  padding: 0 1rem 1rem;
}

.darts-note-panel .darts-note-panel__article-link {
  display: flex;
  min-width: 0;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  width: 100%;
  margin: 0;
  padding: 0.65rem 0.9rem;
  border: 1px solid var(--dnp-line);
  border-radius: 0.65rem;
  background: var(--dnp-selected);
  color: var(--dnp-link);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 700;
  line-height: 1.6;
  text-align: center;
  text-decoration: none;
  overflow-wrap: anywhere;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition:
    background-color 120ms ease,
    border-color 120ms ease;
}

.darts-note-panel .darts-note-panel__image-unavailable {
  margin: 0;
  padding: 1.25rem 1rem;
  border: 1px dashed var(--dnp-line);
  border-radius: 0.6rem;
  background: var(--dnp-soft);
  color: var(--dnp-muted);
  font-size: 0.875rem;
  line-height: 1.7;
  text-align: center;
}

.darts-note-panel button:focus,
.darts-note-panel summary:focus,
.darts-note-panel a:focus,
.darts-note-panel [tabindex]:focus {
  outline: 3px solid var(--dnp-focus);
  outline-offset: 3px;
}

.darts-note-panel button:focus:not(:focus-visible),
.darts-note-panel summary:focus:not(:focus-visible),
.darts-note-panel a:focus:not(:focus-visible),
.darts-note-panel [tabindex]:focus:not(:focus-visible) {
  outline: none;
}

@media (hover: hover) {
  .darts-note-panel .darts-note-panel__disclosure:hover {
    background: var(--dnp-soft);
  }

  .darts-note-panel .darts-note-panel__tab:hover:not(:disabled),
  .darts-note-panel .darts-note-panel__article-link:hover {
    border-color: var(--dnp-accent);
    color: var(--dnp-ink);
  }

  .darts-note-panel .darts-note-panel__article-link:hover {
    text-decoration: underline;
    text-underline-offset: 0.15em;
  }
}

@media (max-width: 359px) {
  .darts-note-panel .darts-note-panel__tabs {
    margin-right: 0.75rem;
    margin-left: 0.75rem;
  }

  .darts-note-panel .darts-note-panel__header {
    padding-inline: 0.75rem;
  }

  .darts-note-panel .darts-note-panel__summary,
  .darts-note-panel .darts-note-panel__disclosure,
  .darts-note-panel .darts-note-panel__figures,
  .darts-note-panel .darts-note-panel__footer {
    padding-right: 0.75rem;
    padding-left: 0.75rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .darts-note-panel *,
  .darts-note-panel *::before,
  .darts-note-panel *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}