/* --- Theme variables --- */
:root {
  --bg: #fafafa;
  --bg-surface: #fff;
  --text: #1a1a1a;
  --text-muted: #666;
  --text-faint: #888;
  --text-faintest: #999;
  --border: #e0e0e0;
  --border-light: #f0f0f0;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-disabled: #93c5fd;
  --hover-bg: #f5f5f5;
  --edge-color: #6e7781;
  --node-font-color: #1a1a1a;
  --sep-color: #ccc;
  --input-bg: #fff;
  --input-border: #ccc;
  --tag-bg: #e0e7ff;
  --tag-text: #3730a3;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f0f0f;
    --bg-surface: #1a1a1a;
    --text: #e0e0e0;
    --text-muted: #aaa;
    --text-faint: #888;
    --text-faintest: #666;
    --border: #2a2a2a;
    --border-light: #222;
    --accent: #5b9aff;
    --accent-hover: #4a89ee;
    --accent-disabled: #2a4a7a;
    --hover-bg: #252525;
    --edge-color: #666;
    --node-font-color: #e0e0e0;
    --sep-color: #444;
    --input-bg: #222;
    --input-border: #444;
    --tag-bg: #1e2a4a;
    --tag-text: #8ab4f8;
  }
}
[data-theme="dark"] {
  --bg: #0f0f0f;
  --bg-surface: #1a1a1a;
  --text: #e0e0e0;
  --text-muted: #aaa;
  --text-faint: #888;
  --text-faintest: #666;
  --border: #2a2a2a;
  --border-light: #222;
  --accent: #5b9aff;
  --accent-hover: #4a89ee;
  --accent-disabled: #2a4a7a;
  --hover-bg: #252525;
  --edge-color: #666;
  --node-font-color: #e0e0e0;
  --sep-color: #444;
  --input-bg: #222;
  --input-border: #444;
  --tag-bg: #1e2a4a;
  --tag-text: #8ab4f8;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: "DM Sans", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
  height: 100vh;
}
header {
  padding: 0.4rem 0.75rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg-surface);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
header h1 { font-size: 1rem; font-weight: 700; white-space: nowrap; letter-spacing: -0.02em; }
#header-context { font-weight: 400; color: var(--text-muted); }
#stats-bar {
  font-size: 0.7rem;
  color: var(--text-muted);
  display: none;
  gap: 1rem;
  flex-wrap: wrap;
  flex: 1;
}
#stats-bar.active { display: flex; }
#stats-bar .stat b { color: var(--text); }

.header-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  flex-shrink: 0;
}
.theme-switcher {
  position: relative;
  display: flex;
  background: var(--hover-bg);
  border-radius: 8px;
  padding: 2px;
}
.theme-switcher-indicator {
  position: absolute;
  top: 2px;
  left: 2px;
  height: calc(100% - 4px);
  width: calc(33.333% - 1.33px); /* subtract 4px container padding / 3 buttons */
  background: var(--bg-surface);
  border-radius: 6px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
  z-index: 0;
  opacity: 0;
}
.theme-switcher-indicator.ready {
  opacity: 1;
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}
.theme-btn {
  position: relative;
  z-index: 1;
  padding: 0.25rem 0.5rem;
  border: none;
  background: none;
  color: var(--text-faint);
  font-size: 0.7rem;
  font-family: "DM Sans", system-ui, sans-serif;
  cursor: pointer;
  border-radius: 6px;
  transition: color 0.2s;
  line-height: 1;
}
.theme-btn.active { color: var(--text); font-weight: 500; }
.theme-btn:hover:not(.active) { color: var(--text-muted); }

#main-area {
  flex: 1;
  display: flex;
  overflow: hidden;
  position: relative;
}

/* Sidebar */
#sidebar {
  width: 320px;
  min-width: 280px;
  background: var(--bg-surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: transform 0.2s ease, opacity 0.2s ease;
  flex-shrink: 0;
}
#sidebar.collapsed {
  transform: translateX(-100%);
  opacity: 0;
  pointer-events: none;
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  z-index: -1;
}
#sidebar-toggle {
  border: none;
  background: none;
  cursor: pointer;
  font-size: 0.7rem;
  color: var(--text-faint);
  padding: 0;
  white-space: nowrap;
}
#sidebar-toggle:hover { color: var(--accent); }
#sidebar-show {
  display: none;
  position: absolute;
  bottom: 0.5rem;
  left: 0.5rem;
  z-index: 20;
  padding: 0.3rem 0.6rem;
  border: 1px solid var(--input-border);
  background: var(--bg-surface);
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.7rem;
  color: var(--text-faint);
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}
#sidebar-show.active { display: block; }
#sidebar-show:hover { color: var(--accent); background: var(--hover-bg); }

#sidebar-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.sidebar-tab {
  flex: 1;
  padding: 0.45rem;
  text-align: center;
  cursor: pointer;
  border: none;
  background: none;
  font-size: 0.75rem;
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
}
.sidebar-tab.active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 500; }
.sidebar-tab:hover { background: var(--hover-bg); }
.tab-panel { display: none; padding: 0.75rem; overflow-y: auto; flex: 1; }
.tab-panel.active { display: block; }
#sidebar-footer {
  padding: 0.5rem 0.75rem;
  border-top: 1px solid var(--border);
  font-size: 0.7rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}
#sidebar-footer a { color: var(--accent); text-decoration: none; }
#sidebar-footer a:hover { text-decoration: underline; }
#sidebar-footer .sep { color: var(--sep-color); }

/* Input tab */
#toml-input {
  width: 100%;
  height: 180px;
  font-family: "JetBrains Mono", "SF Mono", "Fira Code", monospace;
  font-size: 0.75rem;
  padding: 0.5rem;
  border: 1px solid var(--input-border);
  border-radius: 4px;
  resize: vertical;
  background: var(--input-bg);
  color: var(--text);
}
.input-group { margin-top: 0.5rem; }
.input-group label { font-size: 0.7rem; color: var(--text-faint); display: block; margin-bottom: 0.2rem; }
#url-input {
  width: 100%;
  padding: 0.35rem 0.5rem;
  border: 1px solid var(--input-border);
  border-radius: 4px;
  font-size: 0.75rem;
  background: var(--input-bg);
  color: var(--text);
}
.input-controls {
  margin-top: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
#go-btn {
  flex: 1;
  padding: 0.4rem 0.75rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 4px;
  font-size: 0.8rem;
  cursor: pointer;
  font-weight: 500;
}
#go-btn:hover { background: var(--accent-hover); }
#go-btn:disabled { background: var(--accent-disabled); cursor: not-allowed; }

#input-hint {
  margin-top: 0.3rem;
  font-size: 0.7rem;
  color: var(--text-faintest);
  min-height: 1em;
}
#status {
  margin-top: 0.5rem;
  font-size: 0.7rem;
  color: var(--text-muted);
  display: none;
}
#status.active { display: block; }
#error {
  margin-top: 0.5rem;
  font-size: 0.75rem;
  color: #dc2626;
  display: none;
}
#error.active { display: block; }

.examples { margin-top: 0.75rem; font-size: 0.7rem; color: var(--text-faint); line-height: 1.6; }
.examples p { margin: 0; }
.examples a { color: var(--accent); cursor: pointer; text-decoration: none; }
.examples a:hover { text-decoration: underline; }

/* Module tab */
.module-empty { color: var(--text-faintest); font-size: 0.8rem; padding: 1rem 0; text-align: center; }
.detail-row { padding: 0.35rem 0; border-bottom: 1px solid var(--border-light); }
.detail-label { color: var(--text-faint); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.03em; }
.detail-value { margin-top: 0.1rem; word-break: break-word; font-size: 0.8rem; }
.detail-value a { color: var(--accent); text-decoration: none; }
.detail-value a:hover { text-decoration: underline; }
.dep-list { list-style: none; padding: 0; font-size: 0.75rem; }
.dep-list li { padding: 0.2rem 0; font-family: "JetBrains Mono", "SF Mono", "Fira Code", monospace; font-size: 0.7rem; }
.used-by-list { list-style: none; padding: 0; }
.used-by-list li {
  display: inline-block;
  padding: 0.15rem 0.4rem;
  margin: 0.15rem 0.15rem 0 0;
  background: var(--tag-bg);
  color: var(--tag-text);
  border-radius: 3px;
  font-size: 0.7rem;
  cursor: pointer;
  font-family: "JetBrains Mono", "SF Mono", "Fira Code", monospace;
}
.used-by-list li:hover { text-decoration: underline; }
.license-ok { color: #16a34a; }
.license-warn { color: #d97706; }
.license-unknown { color: #dc2626; }

/* Graph tab */
.graph-stats { font-size: 0.8rem; }
.graph-stats dt { color: var(--text-faint); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.03em; margin-top: 0.5rem; }
.graph-stats dd { margin: 0.1rem 0 0; }
.stat-bar-row { display: flex; align-items: center; gap: 0.4rem; margin-top: 0.15rem; font-size: 0.7rem; }
.stat-bar-label { width: 60px; text-align: right; color: var(--text-faint); flex-shrink: 0; }
.stat-bar { flex: 1; height: 14px; background: var(--border-light); border-radius: 3px; overflow: hidden; }
.stat-bar-fill { height: 100%; border-radius: 3px; transition: width 0.3s; }
.stat-bar-count { width: 30px; font-size: 0.7rem; color: var(--text-faint); }
.license-table { width: 100%; font-size: 0.75rem; border-collapse: collapse; margin-top: 0.25rem; }
.license-table td { padding: 0.2rem 0.25rem; border-bottom: 1px solid var(--border-light); }
.license-table td:last-child { text-align: right; color: var(--text-faint); }
.license-row { cursor: pointer; }
.license-row:hover { background: var(--hover-bg); }
.license-row td:first-child::before { content: "\25B8 "; font-size: 0.6rem; color: var(--text-faintest); }
.license-row.expanded td:first-child::before { content: "\25BE "; }
.license-packages { display: none; }
.license-packages.active { display: table-row; }
.license-packages td { padding: 0.3rem 0.5rem; background: var(--hover-bg); }
.license-packages ul { list-style: none; padding: 0; margin: 0; }
.license-packages li { padding: 0.15rem 0; font-family: "JetBrains Mono", "SF Mono", "Fira Code", monospace; font-size: 0.7rem; cursor: pointer; color: var(--accent); }
.license-packages li:hover { text-decoration: underline; }
.top-list { list-style: none; padding: 0; margin-top: 0.15rem; }
.top-list li { display: flex; justify-content: space-between; font-size: 0.7rem; padding: 0.1rem 0; }
.top-list .pkg-name { font-family: "JetBrains Mono", "SF Mono", "Fira Code", monospace; color: var(--accent); cursor: pointer; }
.top-list .pkg-name:hover { text-decoration: underline; }
.top-list .pkg-size { color: var(--text-faint); }

/* Graph area */
#graph-wrapper {
  flex: 1;
  overflow: hidden;
  position: relative;
}
#graph-container {
  width: 100%;
  height: 100%;
  overflow: hidden;
  cursor: grab;
}
#graph-container:active { cursor: grabbing; }
#graph-container svg { user-select: none; -webkit-user-select: none; transform-origin: 0 0; }
#graph-container .node { cursor: pointer; }
#graph-container .node:hover polygon,
#graph-container .node:hover ellipse { stroke: var(--accent); stroke-width: 2; }

/* Empty state */
#empty-state {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-faint);
  text-align: center;
  padding: 2rem;
  gap: 0.75rem;
}
#empty-state.hidden { display: none; }
/* When loading from URL params, hide empty state and show spinner */
:root[data-loading] #empty-state .empty-motif,
:root[data-loading] #empty-state h2,
:root[data-loading] #empty-state p { display: none; }
:root[data-loading] #empty-state::after {
  content: "Loading...";
  font-size: 0.8rem;
  color: var(--text-faint);
}
/* Hide sidebar content and stats bar during URL-param load to prevent flash */
:root[data-loading] .tab-panel { visibility: hidden; }
:root[data-loading] #stats-bar { display: none !important; }
:root[data-loading] #sidebar-tabs { visibility: hidden; }
#empty-state .empty-motif {
  width: 120px;
  height: 120px;
  opacity: 0.18;
  margin-bottom: 0.5rem;
  animation: empty-fade-in 0.8s ease-out;
}
#empty-state h2 { font-size: 1.5rem; font-weight: 700; color: var(--text); letter-spacing: -0.03em; animation: empty-fade-in 0.6s ease-out; }
#empty-state p { font-size: 0.85rem; max-width: 400px; line-height: 1.5; animation: empty-fade-in 0.6s 0.1s ease-out both; }
#empty-state .empty-hint { font-size: 0.75rem; margin-top: 0.25rem; animation: empty-fade-in 0.6s 0.2s ease-out both; }
@keyframes empty-fade-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
#empty-state .empty-motif { animation: empty-motif-in 1s ease-out; }
@keyframes empty-motif-in {
  from { opacity: 0; transform: scale(0.85); }
  to { opacity: 0.18; transform: scale(1); }
}

/* Search */
#graph-search {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  z-index: 10;
  display: none;
}
#graph-search.active { display: flex; }
#graph-search input {
  padding: 0.35rem 0.5rem;
  border: 1px solid var(--input-border);
  border-radius: 4px;
  font-size: 0.75rem;
  width: 180px;
  background: var(--bg-surface);
  color: var(--text);
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}
#graph-search input::placeholder { color: var(--text-faintest); }
#search-count {
  font-size: 0.7rem;
  color: var(--text-faint);
  margin-left: 0.3rem;
  align-self: center;
  white-space: nowrap;
}

#zoom-controls {
  position: absolute;
  bottom: 0.75rem;
  left: 50%;
  transform: translateX(-50%);
  display: none;
  align-items: center;
  gap: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg-surface) 80%, transparent);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.2rem 0.25rem;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
[data-theme="dark"] #zoom-controls { box-shadow: 0 2px 12px rgba(0,0,0,0.3); }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) #zoom-controls { box-shadow: 0 2px 12px rgba(0,0,0,0.3); }
}
#zoom-controls.active { display: flex; }
#zoom-controls button {
  width: 30px;
  height: 30px;
  border: none;
  background: none;
  border-radius: 7px;
  cursor: pointer;
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, color 0.15s;
}
#zoom-controls button:hover { background: var(--hover-bg); color: var(--text); }
.toolbar-label {
  font-size: 0.6rem;
  color: var(--text-faintest);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0 0.25rem;
  user-select: none;
}
.toolbar-sep {
  width: 1px;
  height: 18px;
  background: var(--border);
  margin: 0 0.15rem;
  flex-shrink: 0;
}
#layout-select, #color-select {
  width: fit-content;
  padding: 0.25rem 0.35rem;
  border: none;
  border-radius: 7px;
  font-size: 0.7rem;
  font-family: "DM Sans", system-ui, sans-serif;
  background: none;
  color: var(--text-muted);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 5 5-5z' fill='%23888'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.25rem center;
  padding-right: 1.1rem;
}
#layout-select:hover, #color-select:hover { background-color: var(--hover-bg); color: var(--text); }

/* Mobile hamburger */
#mobile-sidebar-toggle {
  display: none;
  border: none;
  background: none;
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0.2rem;
  color: var(--text);
}
#sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 29;
}

/* Mobile */
@media (max-width: 700px) {
  #mobile-sidebar-toggle { display: block; }
  #sidebar-show { display: none !important; }
  #sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: 30;
    width: 300px;
    min-width: 0;
    transform: translateX(-100%);
    transition: transform 0.2s ease;
  }
  #sidebar.mobile-open {
    transform: translateX(0);
  }
  #sidebar.collapsed { margin-left: 0; transform: translateX(-100%); opacity: 1; }
  #sidebar-overlay.active { display: block; }
  #graph-search input { width: 140px; }
  #zoom-controls { bottom: 0.5rem; padding: 0.15rem 0.2rem; border-radius: 8px; max-width: calc(100vw - 1rem); }
  #zoom-controls button { width: 28px; height: 28px; font-size: 0.75rem; }
}