/* Element Discovery Timeline & Periodic Table */

.ed-outer {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.2rem;
}

.breadcrumb {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}
.breadcrumb a {
  color: var(--color-primary);
  text-decoration: none;
}
.breadcrumb a:hover {
  text-decoration: underline;
}

.ed-intro {
  font-size: 0.92rem;
  color: var(--color-text-light);
  margin-bottom: 1.2rem;
  line-height: 1.8;
}

/* Toolbar (view toggle + legend) */
.ed-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  margin: 0.6rem 0 0.4rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--color-border);
}
.ed-toggle-group {
  display: inline-flex;
  border: 1px solid var(--color-primary);
}
.ed-toggle {
  background: var(--color-white);
  color: var(--color-primary);
  border: none;
  padding: 0.5rem 1.2rem;
  font-family: var(--font-primary);
  font-size: 0.85rem;
  cursor: pointer;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
}
.ed-toggle + .ed-toggle {
  border-left: 1px solid var(--color-primary);
}
.ed-toggle:hover {
  background: var(--color-bg-alt);
}
.ed-toggle.active {
  background: var(--color-primary);
  color: var(--color-white);
}

.ed-legend {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  font-size: 0.72rem;
  color: var(--color-text-muted);
  flex: 1;
  min-width: 0;
}
.ed-legend-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 0.7rem;
  align-items: center;
}
.ed-legend-group-label {
  font-weight: 500;
  color: var(--color-text-light);
  margin-right: 0.1rem;
  font-size: 0.7rem;
}
.ed-legend-item {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}
.ed-legend-dot {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  display: inline-block;
}
.ed-legend-ring {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  display: inline-block;
  border: 2.5px solid;
  background: transparent;
  box-sizing: border-box;
}

/* Filters */
.ed-filters {
  margin: 0.4rem 0 0.6rem;
  padding: 0.5rem 0.7rem;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  font-size: 0.78rem;
}
.ed-filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 0.6rem;
  align-items: center;
  margin-bottom: 0.35rem;
}
.ed-filter-row:last-of-type { margin-bottom: 0; }
.ed-filter-label {
  font-weight: 500;
  color: var(--color-text-muted);
  min-width: 4em;
  font-size: 0.78rem;
}
.ed-chips {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}
.ed-chip {
  background: var(--color-white);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  padding: 0.18rem 0.6rem;
  font-family: var(--font-primary);
  font-size: 0.74rem;
  cursor: pointer;
  border-radius: 999px;
  transition: background 0.12s, color 0.12s, border-color 0.12s;
  user-select: none;
}
.ed-chip:hover {
  border-color: var(--color-primary);
}
.ed-chip.active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}
.ed-chip-action {
  background: transparent;
  color: var(--color-text-muted);
  border: 1px dashed var(--color-border);
  padding: 0.18rem 0.6rem;
  font-family: var(--font-primary);
  font-size: 0.72rem;
  cursor: pointer;
  border-radius: 999px;
  user-select: none;
}
.ed-chip-action:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.ed-filter-status {
  margin: 0.3rem 0 0;
  font-size: 0.74rem;
  color: var(--color-text-muted);
  font-feature-settings: "tnum";
}
.ed-filter-help {
  margin: 0.3rem 0 0;
  font-size: 0.74rem;
}
.ed-filter-help > summary {
  cursor: pointer;
  color: var(--color-text-muted);
  list-style: none;
  user-select: none;
}
.ed-filter-help > summary::-webkit-details-marker { display: none; }
.ed-filter-help > summary::before {
  content: "▸";
  margin-right: 0.3em;
  font-size: 0.85em;
}
.ed-filter-help[open] > summary::before { content: "▾"; }
.ed-filter-help > summary:hover { color: var(--color-primary); }
.ed-filter-help p {
  margin: 0.3rem 0;
  color: var(--color-text-light);
  line-height: 1.7;
  padding-left: 1.2em;
}

/* フィルタで非表示の元素マーカー */
.ed-element[data-filtered="1"] { opacity: 0.08; pointer-events: none; }

/* 同発見者 sibling ハイライト (era stroke を維持して accent でグロー) */
.ed-element.related circle {
  stroke-width: 5;
  filter: drop-shadow(0 0 3px var(--color-accent));
}
.ed-element.hover-self circle {
  stroke-width: 6;
  filter: drop-shadow(0 0 5px var(--color-accent));
}
.ed-disc-node.related circle {
  stroke: var(--color-accent);
  stroke-width: 3;
}

/* 年代スライダー */
.ed-year-slider {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0.4rem 0;
  padding: 0.5rem 0.7rem;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  font-size: 0.78rem;
}
.ed-year-btn {
  background: var(--color-white);
  color: var(--color-primary);
  border: 1px solid var(--color-border);
  padding: 0.2rem 0.55rem;
  font-size: 0.85rem;
  cursor: pointer;
  font-family: var(--font-primary);
  line-height: 1;
}
.ed-year-btn:hover {
  border-color: var(--color-primary);
  background: var(--color-bg-alt);
}
.ed-year-btn.playing {
  background: var(--color-accent);
  color: var(--color-white);
  border-color: var(--color-accent);
}
.ed-year-display {
  font-family: var(--font-primary);
  font-weight: 700;
  color: var(--color-primary);
  font-size: 0.82rem;
  font-feature-settings: "tnum";
  min-width: 5em;
}
.ed-year-slider input[type="range"] {
  flex: 1;
  min-width: 0;
  accent-color: var(--color-primary);
}
.ed-year-hint {
  color: var(--color-text-muted);
  font-size: 0.74rem;
  white-space: nowrap;
}
@media (max-width: 768px) {
  .ed-year-hint { display: none; }
}

/* Chart wrap */
.ed-chart-wrap {
  position: relative;
  margin-top: 0.4rem;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  overflow: auto;
  max-height: calc(70vh - 140px);
  min-height: 420px;
  cursor: grab;
}
.ed-chart-wrap.is-panning {
  cursor: grabbing;
  user-select: none;
}
#ed-chart {
  display: block;
}

/* Element marker (SVG circle + text)
   fill = 状態 (state_rt)、stroke = 発見年代 (era_category) — JS で動的設定
   ここでは hover / selected の強調のみ扱う (era stroke を維持して width / filter で強調) */
.ed-element {
  cursor: pointer;
}
.ed-element circle {
  transition: stroke-width 0.15s, filter 0.15s;
}
.ed-element:hover circle {
  stroke-width: 5;
}
.ed-element.selected circle {
  stroke-width: 5;
  filter: drop-shadow(0 0 4px var(--color-accent));
}
.ed-element text {
  pointer-events: none;
  text-anchor: middle;
  dominant-baseline: central;
  font-family: var(--font-primary);
  font-size: 13px;
  font-weight: 700;
  fill: var(--color-bg);
}

/* Discoverer node (network view) */
.ed-disc-node {
  cursor: pointer;
}
.ed-disc-node circle {
  stroke: var(--color-bg);
  stroke-width: 1.5;
  transition: stroke 0.15s, stroke-width 0.15s;
}
.ed-disc-node:hover circle {
  stroke: var(--color-accent);
  stroke-width: 3;
}
.ed-disc-node.selected circle {
  stroke: var(--color-accent);
  stroke-width: 3.5;
}

/* Network link */
.ed-links line {
  pointer-events: none;
}

/* Axis & grid */
.ed-axis {
  font-family: var(--font-primary);
  font-size: 11px;
  color: var(--color-text-muted);
}
.ed-axis line, .ed-axis path {
  stroke: var(--color-border);
}
.ed-grid line {
  stroke: var(--color-border);
  stroke-dasharray: 2 3;
  stroke-opacity: 0.6;
}
.ed-axis-label {
  font-family: var(--font-primary);
  font-size: 12px;
  fill: var(--color-text-muted);
  font-weight: 500;
}

/* Tooltip */
.ed-tooltip {
  position: fixed;
  z-index: 1000;
  background: var(--color-text);
  color: var(--color-white);
  padding: 0.4rem 0.6rem;
  font-size: 0.78rem;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.1s;
  white-space: nowrap;
}
.ed-tooltip[data-visible="1"] {
  opacity: 1;
}
.ed-tooltip strong {
  font-size: 0.92rem;
}

/* Detail panel */
.ed-detail-panel {
  margin: 0.8rem 0 0;
  padding: 1rem 1.2rem;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  font-size: 0.9rem;
  min-height: 80px;
  position: relative;
}
.ed-detail-empty {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}
.ed-detail-close {
  position: absolute;
  top: 0.5rem;
  right: 0.6rem;
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.78rem;
  padding: 0.15rem 0.5rem;
  cursor: pointer;
  font-family: var(--font-primary);
}
.ed-detail-close:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.ed-detail-header {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  margin-bottom: 0.5rem;
}
.ed-detail-symbol {
  font-family: var(--font-accent);
  font-size: 1.6rem;
  color: var(--color-primary);
  font-weight: 700;
}
.ed-detail-name {
  font-family: var(--font-accent);
  font-size: 1.1rem;
  color: var(--color-text);
}
.ed-detail-z {
  font-family: var(--font-primary);
  font-size: 0.78rem;
  color: var(--color-text-muted);
  margin-left: auto;
}
.ed-detail-meta {
  display: grid;
  grid-template-columns: 6rem 1fr;
  gap: 0.3rem 0.8rem;
  font-size: 0.84rem;
  margin: 0.5rem 0;
  color: var(--color-text);
}
.ed-detail-meta dt {
  color: var(--color-text-muted);
}
.ed-detail-notes {
  margin: 0.5rem 0;
  font-size: 0.85rem;
  color: var(--color-text-light);
  line-height: 1.7;
}
.ed-detail-actions {
  margin-top: 0.6rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.8rem;
}
.ed-detail-actions a {
  color: var(--color-primary);
  text-decoration: none;
  font-size: 0.82rem;
  border-bottom: 1px dotted var(--color-primary);
}
.ed-detail-actions a:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* 参考書籍 (アフィ) */
.ed-books {
  margin-top: 0.8rem;
  padding-top: 0.6rem;
  border-top: 1px dashed var(--color-border);
}
.ed-books-title {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  margin-bottom: 0.4rem;
  font-weight: 500;
}
.ed-books-pr {
  font-family: var(--font-primary);
  font-size: 0.7rem;
  color: var(--color-accent);
  margin-left: 0.3em;
  font-weight: 700;
  letter-spacing: 0.05em;
}
.ed-books-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.ed-book {
  display: flex;
  flex-direction: column;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  padding: 0.5rem 0.7rem;
  text-decoration: none;
  color: var(--color-text);
  font-size: 0.82rem;
  flex: 1 1 220px;
  max-width: 360px;
  transition: border-color 0.12s, background 0.12s;
}
.ed-book:hover {
  border-color: var(--color-primary);
  background: var(--color-white);
}
.ed-book-title {
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: 0.15rem;
}
.ed-book-author {
  color: var(--color-text-muted);
  font-size: 0.76rem;
}

/* Guide section */
.ed-guide {
  margin-top: 2rem;
  font-size: 0.92rem;
  color: var(--color-text-light);
  line-height: 1.85;
}
.ed-guide h3 {
  font-family: var(--font-accent);
  font-size: 1.1rem;
  color: var(--color-primary);
  margin: 1.4rem 0 0.5rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--color-border);
}
.ed-guide ul {
  padding-left: 1.4rem;
  margin: 0.4rem 0;
}
.ed-guide li {
  margin-bottom: 0.3rem;
}

/* Mobile */
@media (max-width: 768px) {
  .ed-outer {
    padding: 0 0.6rem;
  }
  .ed-chart-wrap {
    max-height: calc(70vh - 112px);
  }
  .ed-toolbar {
    gap: 0.6rem;
  }
}