/* ── Reset & base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0d1117;
  --bg-surface: #161b22;
  --bg-hover: #1c2333;
  --border: #30363d;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --accent: #58a6ff;
  --accent-dim: #1f6feb;
  --green: #3fb950;
  --orange: #d29922;
  --red: #f85149;
  --purple: #bc8cff;

  --edge-influenced: #58a6ff;
  --edge-member: #3fb950;
  --edge-collab: #d29922;
  --edge-teacher: #bc8cff;
  --edge-subgroup: #f85149;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  -webkit-tap-highlight-color: transparent;
}

/* ── Header ── */
#header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 16px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  z-index: 10;
  flex-shrink: 0;
}
#header h1 {
  font-size: 16px;
  font-weight: 600;
  color: var(--accent);
  white-space: nowrap;
}
#author-link {
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
  text-decoration: none;
  font-size: 12px;
  white-space: nowrap;
}
#author-link:hover { color: #0a66c2; }
#search-area {
  display: flex;
  gap: 6px;
  flex: 1;
  max-width: 400px;
}
#search-input {
  flex: 1;
  padding: 6px 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 14px;
  outline: none;
}
#search-input:focus { border-color: var(--accent); }
#search-btn {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--accent-dim);
  color: var(--text);
  cursor: pointer;
  font-size: 14px;
  white-space: nowrap;
}
#search-btn:hover { background: var(--accent); color: #000; }
#stats-bar {
  margin-left: auto;
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
}

/* ── Search results dropdown ── */
#search-results {
  position: absolute;
  top: 48px;
  left: 80px;
  width: min(420px, calc(100vw - 32px));
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  z-index: 20;
  max-height: 300px;
  overflow-y: auto;
  box-shadow: 0 8px 24px rgba(0,0,0,.5);
}
#search-results.hidden { display: none; }
.search-item {
  padding: 10px 14px;
  cursor: pointer;
  border-bottom: 1px solid var(--border);
}
.search-item:last-child { border-bottom: none; }
.search-item:hover, .search-item:active { background: var(--bg-hover); }
.search-item-name { font-weight: 500; font-size: 14px; }
.search-item-meta { font-size: 12px; color: var(--text-muted); margin-top: 2px; }

/* ── Breadcrumbs ── */
#breadcrumbs {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 16px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  font-size: 13px;
  overflow-x: auto;
  white-space: nowrap;
  flex-shrink: 0;
  -webkit-overflow-scrolling: touch;
}
#breadcrumbs.hidden { display: none; }
.crumb {
  color: var(--accent);
  cursor: pointer;
  padding: 2px 4px;
  border-radius: 4px;
}
.crumb:hover { background: var(--bg-hover); }
.crumb.current { color: var(--text); cursor: default; font-weight: 600; }
.crumb-sep { color: var(--text-muted); }

/* ── Main layout ── */
#main {
  flex: 1;
  display: flex;
  position: relative;
  overflow: hidden;
  min-height: 0;
}

/* ── Graph ── */
#graph-container {
  flex: 1;
  position: relative;
  min-width: 0;
}
#graph-svg { width: 100%; height: 100%; display: block; }
#empty-state {
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  text-align: center; color: var(--text-muted); font-size: 16px;
}
#empty-state.hidden { display: none; }

/* ── Graph nodes ── */
.node { cursor: pointer; }
.node circle { stroke-width: 2px; transition: r 0.15s ease; }
.node text {
  font-size: 11px; fill: var(--text-muted);
  pointer-events: none; text-anchor: middle;
}
.node.center circle { r: 16; }
.node.person circle { fill: var(--accent); stroke: var(--accent-dim); }
.node.group circle  { fill: var(--green); stroke: #238636; }
.node.other circle  { fill: var(--text-muted); stroke: var(--border); }
.node.selected circle { stroke: #ffe600; stroke-width: 3px; }
.node.dimmed circle { opacity: 0.15; }
.node.dimmed text   { opacity: 0.1; }

/* Badge showing total edge count on unexpanded nodes */
.edge-badge {
  font-size: 9px;
  fill: var(--text-muted);
  text-anchor: middle;
  pointer-events: none;
}

/* ── Graph links ── */
.link { stroke-opacity: 0.5; fill: none; }
.link.influenced_by { stroke: var(--edge-influenced); }
.link.member_of     { stroke: var(--edge-member); }
.link.collaboration { stroke: var(--edge-collab); stroke-dasharray: 4 2; }
.link.teacher_of    { stroke: var(--edge-teacher); }
.link.subgroup      { stroke: var(--edge-subgroup); }
.link.highlighted   { stroke-opacity: 1; stroke-width: 2.5px; }
.link.edge-hidden   { display: none; }
.node.edge-hidden   { display: none; }
.link.dimmed        { stroke-opacity: 0.08; }

/* ── Legend ── */
#legend {
  position: absolute;
  bottom: 12px; left: 12px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 11px;
  display: flex; flex-direction: column; gap: 4px;
}
.legend-item { display: flex; align-items: center; gap: 6px; color: var(--text-muted); }
.legend-toggle {
  display: flex; align-items: center; gap: 6px;
  color: var(--text-muted); cursor: pointer;
  padding: 2px 4px; border-radius: 4px;
  user-select: none; -webkit-user-select: none;
}
.legend-toggle:hover { background: var(--bg-hover); }
.legend-toggle.off { opacity: 0.35; text-decoration: line-through; }
/* Info button — mobile only, appears bottom-right when sheet is dismissed */
#info-btn {
  position: absolute;
  bottom: 16px; right: 16px;
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--accent-dim);
  border: 1px solid var(--accent);
  color: var(--text);
  font-size: 16px; font-weight: 700; font-style: italic;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  z-index: 15;
}
#info-btn.hidden { display: none; }

.legend-swatch { width: 18px; height: 3px; border-radius: 2px; }
.legend-swatch.dashed {
  background: repeating-linear-gradient(90deg, var(--edge-collab) 0 4px, transparent 4px 6px);
}

/* ── Detail panel (desktop) ── */
#detail-panel {
  width: 320px;
  background: var(--bg-surface);
  border-left: 1px solid var(--border);
  padding: 16px;
  overflow-y: auto;
  position: relative;
  flex-shrink: 0;
  display: flex; flex-direction: column;
}
#detail-content { flex: 1; display: flex; flex-direction: column; min-height: 0; }
#detail-panel.hidden { display: none; }
#detail-close {
  position: absolute; top: 8px; right: 8px;
  background: none; border: none;
  color: var(--text-muted); font-size: 20px; cursor: pointer;
}
#detail-close:hover { color: var(--text); }

/* ── Detail content (shared by desktop panel and mobile bottom sheet) ── */
.detail-header h2 { font-size: 18px; margin-bottom: 4px; display: inline; }
.detail-header.detail-item { padding: 4px 0; }
.wiki-btn {
  background: none; border: 1px solid var(--border); border-radius: 4px;
  color: var(--text-muted); cursor: pointer; padding: 1px 5px;
  font-size: 11px; font-weight: 700; margin-left: auto; flex-shrink: 0;
}
.wiki-btn:hover { color: var(--accent); border-color: var(--accent); }
.detail-meta { font-size: 13px; color: var(--text-muted); margin-bottom: 10px; }
.detail-genres { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 12px; }
.genre-tag {
  padding: 2px 8px; background: var(--bg-hover);
  border: 1px solid var(--border); border-radius: 12px;
  font-size: 11px; color: var(--text-muted);
}
.detail-section { margin-bottom: 12px; }
.detail-section h3 { font-size: 13px; color: var(--accent); margin-bottom: 4px; }
.detail-item {
  padding: 6px 0; font-size: 13px; cursor: pointer; color: var(--text);
  display: flex; align-items: center; gap: 6px;
}
.detail-item:hover, .detail-item:active { color: var(--accent); }
.detail-item .expand-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--orange); flex-shrink: 0;
}

/* ── Album toggle chevron ── */
.album-toggle {
  background: none; border: none; color: var(--text-muted);
  font-size: 8px; cursor: pointer; padding: 4px;
  flex-shrink: 0; transition: transform 0.15s ease;
  line-height: 1;
}
.album-toggle:hover { color: var(--accent); }
.album-toggle.open { transform: rotate(90deg); }

/* Artist name within detail item — clickable to navigate */
.detail-item-name { cursor: pointer; }
.detail-item-name:hover { color: var(--accent); }

/* ── Album sub-list (collapsible under each artist) ── */
.album-list {
  margin-left: 22px; padding-left: 8px;
  border-left: 1px solid var(--border);
  margin-bottom: 4px;
}
.album-list.hidden { display: none; }
.album-item {
  padding: 3px 0; font-size: 12px; color: var(--text-muted);
  display: flex; align-items: baseline; gap: 6px;
}
.album-item a {
  color: var(--accent); text-decoration: none;
}
.album-item a:hover { text-decoration: underline; }
.album-year {
  font-size: 11px; color: var(--text-muted); opacity: 0.7;
  flex-shrink: 0;
}
.album-loading {
  padding: 4px 0; font-size: 12px; color: var(--text-muted);
  font-style: italic;
}

/* ── Wikipedia modal overlay ── */
#wiki-modal {
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,.6);
  z-index: 40;
  display: flex; align-items: center; justify-content: center;
  padding: 16px;
}
#wiki-modal.hidden { display: none; }
#wiki-modal-box {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  width: min(900px, 95vw);
  height: min(85vh, 95vh);
  display: flex; flex-direction: column;
  overflow: hidden;
}
#wiki-modal-box .wiki-toolbar {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 12px; flex-shrink: 0;
  border-bottom: 1px solid var(--border);
}
#wiki-modal-box .wiki-back {
  background: none; border: 1px solid var(--border); border-radius: 6px;
  color: var(--accent); cursor: pointer; padding: 4px 10px;
  font-size: 13px;
}
#wiki-modal-box .wiki-back:hover { background: var(--bg-hover); }
#wiki-modal-box .wiki-open-ext {
  color: var(--text-muted); text-decoration: none; font-size: 16px;
  padding: 4px 6px;
}
#wiki-modal-box .wiki-open-ext:hover { color: var(--accent); }
#wiki-modal-close {
  background: none; border: none; color: var(--text-muted);
  font-size: 22px; cursor: pointer; margin-left: auto; padding: 4px 8px;
}
#wiki-modal-close:hover { color: var(--text); }
#wiki-modal-box .wiki-iframe {
  flex: 1; border: none;
  background: #fff;
}

/* ── Bottom sheet (mobile) ── */
#bottom-sheet {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  border-radius: 16px 16px 0 0;
  max-height: 55vh;
  overflow-y: auto;
  z-index: 25;
  padding: 8px 16px 16px;
  transform: translateY(0);
  transition: transform 0.25s ease;
}
#bottom-sheet.hidden { transform: translateY(100%); pointer-events: none; }
#bottom-sheet-handle {
  width: 36px; height: 4px; border-radius: 2px;
  background: var(--border); margin: 0 auto 10px;
}
#bottom-sheet-content { /* filled by JS */ }

/* ── Blocking overlay ── */
#overlay {
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,.55);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 12px;
  z-index: 50;
}
#overlay.hidden { display: none; }
#overlay-text { font-size: 14px; color: var(--text-muted); }
.overlay-spinner {
  width: 28px; height: 28px;
  border: 3px solid var(--border); border-top-color: var(--accent);
  border-radius: 50%; animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ══════════════════════════════════════════════════════════════
   Mobile overrides (viewport <= 640px)
   ══════════════════════════════════════════════════════════════ */
@media (max-width: 640px) {
  #header h1 { font-size: 14px; }
  #search-area { max-width: none; }
  #stats-bar { display: none; }

  /* Hide desktop detail panel on mobile */
  #detail-panel { display: none !important; }

  /* Graph fills the whole screen */
  #graph-container { flex: 1; }

  /* Larger tap targets for nodes */
  .node circle { r: 12; }
  .node.center circle { r: 18; }
  .node text { font-size: 10px; }

  /* Legend smaller */
  #legend { font-size: 10px; padding: 6px 8px; bottom: 8px; left: 8px; }

  /* Breadcrumbs scroll horizontally */
  #breadcrumbs { padding: 4px 12px; font-size: 12px; }
}

/* ══════════════════════════════════════════════════════════════
   Desktop overrides (viewport > 640px)
   ══════════════════════════════════════════════════════════════ */
@media (min-width: 641px) {
  /* Hide mobile bottom sheet on desktop */
  #bottom-sheet { display: none !important; }
}