:root {
  --stage: #1e252e;
  --panel: #252d37;
  --panel-2: #2c3540;
  --line: #36424f;
  --bone: #e6e1d6;
  --muted: #8d99a6;
  --film: #8cc7c1;
  --film-ink: #12302d;
  --paper: #efe8da;
  --ink: #2a2420;
  --ink-soft: #6b5f55;
  --warn: #e4a487;
  --good: #9bd3a3;
  --serif: Charter, "Bitstream Charter", "Iowan Old Style", "Sitka Text", Cambria, Georgia, "DejaVu Serif", serif;
  --sans: Inter, "Segoe UI", Cantarell, "Noto Sans", Ubuntu, system-ui, -apple-system, sans-serif;
  --r-s: 4px;
  --r-m: 8px;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body { background: var(--stage); color: var(--bone); font: 14px/1.45 var(--sans); overflow: hidden; }
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; }
:focus-visible { outline: 2px solid var(--film); outline-offset: 2px; }
[hidden] { display: none !important; }
a { color: var(--film); }

#app {
  height: 100vh;
  display: grid;
  grid-template-columns: 280px 1fr 340px;
  grid-template-rows: 52px 1fr 30px;
  grid-template-areas: "top top top" "side stage insp" "status status status";
}

/* ---------- top bar ---------- */
.topbar {
  grid-area: top; display: flex; align-items: center; gap: 16px;
  padding: 0 14px; background: var(--panel); border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 9px; font-weight: 600; letter-spacing: 0.01em; white-space: nowrap; }
.brand svg { width: 22px; height: 22px; fill: none; stroke: var(--film); stroke-width: 2; stroke-linecap: round; }
.brand svg circle { fill: var(--film); stroke: none; }

.search { position: relative; flex: 1; max-width: 460px; }
.search input {
  width: 100%; height: 34px; padding: 0 12px; border-radius: var(--r-m);
  background: var(--stage); border: 1px solid var(--line); outline: none;
}
.search input:focus { border-color: var(--film); }
.search-results {
  position: absolute; top: 38px; left: 0; right: 0; z-index: 20; margin: 0; padding: 4px; list-style: none;
  max-height: 60vh; overflow: auto; background: var(--panel-2); border: 1px solid var(--line); border-radius: var(--r-m);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
}
.search-results li { padding: 6px 10px; border-radius: var(--r-s); cursor: pointer; display: flex; gap: 8px; align-items: baseline; }
.search-results li .n { flex: 1; }
.search-results li .c { color: var(--muted); font-size: 12px; white-space: nowrap; }
.search-results li[aria-selected="true"], .search-results li:hover { background: var(--line); }
.search-results .none { color: var(--muted); cursor: default; }

.seg { display: inline-flex; background: var(--stage); border: 1px solid var(--line); border-radius: var(--r-m); padding: 2px; }
.seg button { border: 0; background: none; padding: 5px 12px; border-radius: 6px; color: var(--muted); }
.seg button.on { background: var(--film); color: var(--film-ink); font-weight: 600; }
.seg.small button { padding: 4px 8px; font-size: 12.5px; }
.seg.full { display: flex; margin: 12px; }
.seg.full button { flex: 1; }

.tools { display: flex; align-items: center; gap: 6px; margin-left: auto; }
.icon-btn {
  height: 32px; padding: 0 10px; border-radius: var(--r-m); border: 1px solid var(--line);
  background: transparent; color: var(--bone); font-size: 13px; white-space: nowrap;
}
.icon-btn:hover { background: var(--panel-2); }
.icon-btn[aria-pressed="true"] { background: var(--film); color: var(--film-ink); border-color: var(--film); }
#btnHelp { width: 32px; padding: 0; }

/* ---------- sidebar ---------- */
.sidebar { grid-area: side; background: var(--panel); border-right: 1px solid var(--line); display: flex; flex-direction: column; min-height: 0; }
.tabs { display: flex; border-bottom: 1px solid var(--line); }
.tab { flex: 1; border: 0; background: none; padding: 11px 0 10px; color: var(--muted); border-bottom: 2px solid transparent; }
.tab.on { color: var(--bone); border-bottom-color: var(--film); }
.pane { flex: 1; overflow: auto; min-height: 0; display: flex; flex-direction: column; }
.pane[data-pane="sections"] { padding: 14px; gap: 10px; }
.note { color: var(--muted); font-size: 13px; margin: 0; }
.note.warn { color: var(--warn); }

.layer-list { list-style: none; margin: 0; padding: 8px; }
.layer-list li { display: flex; align-items: center; gap: 10px; padding: 7px 8px; border-radius: var(--r-s); }
.layer-list li:hover { background: var(--panel-2); }
.layer-list .swatch { width: 14px; height: 14px; }
.layer-list .name { flex: 1; }
.layer-list .count { color: var(--muted); font-size: 12px; font-variant-numeric: tabular-nums; }
.layer-list .solo { border: 0; background: none; color: var(--muted); font-size: 12px; padding: 2px 4px; opacity: 0; }
.layer-list li:hover .solo, .layer-list .solo:focus-visible { opacity: 1; }
.layer-list .solo:hover { color: var(--film); }
.pane-foot { margin-top: auto; padding: 12px 16px; border-top: 1px solid var(--line); display: flex; flex-direction: column; gap: 6px; }

.toggle { appearance: none; width: 30px; height: 17px; border-radius: 9px; background: var(--line); position: relative; cursor: pointer; flex: none; margin: 0; }
.toggle::after { content: ""; position: absolute; top: 2px; left: 2px; width: 13px; height: 13px; border-radius: 50%; background: var(--muted); transition: transform 0.12s; }
.toggle:checked { background: var(--film); }
.toggle:checked::after { transform: translateX(13px); background: var(--film-ink); }

.swatch { display: inline-block; width: 11px; height: 11px; border-radius: 3px; flex: none; }

.tree { list-style: none; margin: 0; padding: 0 6px 12px; }
.tree ul { list-style: none; margin: 0; padding-left: 14px; }
.tree .row { display: flex; align-items: center; gap: 4px; padding: 2px 4px; border-radius: var(--r-s); }
.tree .row:hover { background: var(--panel-2); }
.tree .row.sel { background: rgba(140, 199, 193, 0.18); }
.tree .caret { width: 18px; height: 20px; border: 0; background: none; color: var(--muted); padding: 0; flex: none; font-size: 10px; }
.tree .caret.leaf { visibility: hidden; }
.tree .eye { width: 22px; height: 20px; border: 0; background: none; padding: 0; flex: none; color: var(--muted); }
.tree .eye svg { width: 15px; height: 15px; fill: none; stroke: currentColor; stroke-width: 1.6; }
.tree .eye.off { opacity: 0.35; }
.tree .eye.part { color: var(--film); opacity: 0.6; }
.tree .label { flex: 1; border: 0; background: none; text-align: left; padding: 2px 2px; font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tree .cnt { color: var(--muted); font-size: 11px; font-variant-numeric: tabular-nums; }

.radio-col { display: flex; flex-direction: column; gap: 8px; }
.radio-col label, .check { display: flex; gap: 8px; align-items: center; }
.slider-label { color: var(--muted); font-size: 12.5px; margin-top: 6px; }
input[type="range"] { width: 100%; accent-color: var(--film); }
input[type="radio"], input[type="checkbox"] { accent-color: var(--film); }

/* ---------- stage ---------- */
.stage { grid-area: stage; position: relative; min-width: 0; min-height: 0; background: radial-gradient(ellipse at 50% 40%, #27303b 0%, var(--stage) 70%); }
#viewport { width: 100%; height: 100%; display: block; cursor: grab; outline: none; }
#viewport.dragging { cursor: grabbing; }
.stage-hint { position: absolute; bottom: 10px; left: 0; right: 0; text-align: center; margin: 0; color: var(--muted); font-size: 12px; pointer-events: none; opacity: 0.8; }
.loading { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; color: var(--muted); pointer-events: none; }

.pin { position: absolute; left: 0; top: 0; pointer-events: none; transform: translate(-50%, -100%); }
.pin span {
  display: block; margin-bottom: 14px; padding: 4px 9px; border-radius: var(--r-s);
  background: var(--paper); color: var(--ink); font: 600 13px/1.3 var(--serif); white-space: nowrap;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.35);
}
.pin::after { content: ""; position: absolute; left: 50%; bottom: 0; width: 1px; height: 14px; background: var(--paper); }
.pin::before { content: ""; position: absolute; left: calc(50% - 3px); bottom: -3px; width: 7px; height: 7px; border-radius: 50%; background: var(--paper); }

.hover-tip { position: absolute; pointer-events: none; padding: 3px 8px; border-radius: var(--r-s); background: rgba(20, 25, 32, 0.92); border: 1px solid var(--line); font-size: 12.5px; white-space: nowrap; transform: translate(12px, 12px); }

/* ---------- inspector ---------- */
.inspector { grid-area: insp; background: var(--panel); border-left: 1px solid var(--line); overflow: auto; padding: 16px; display: flex; flex-direction: column; gap: 16px; min-height: 0; }
.empty h2 { font: 600 19px/1.3 var(--serif); margin: 8px 0 8px; color: var(--bone); }
.empty p { color: var(--muted); margin: 0; }

.tag {
  position: relative; background: var(--paper); color: var(--ink); border-radius: 6px 6px 6px 22px;
  padding: 20px 18px 16px 30px; box-shadow: 0 10px 28px rgba(0, 0, 0, 0.35);
}
.tag-hole { position: absolute; left: 11px; top: 22px; width: 9px; height: 9px; border-radius: 50%; background: var(--panel); box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.5); }
.tag h2 { font: 600 22px/1.2 var(--serif); margin: 0 0 4px; overflow-wrap: anywhere; }
.tag-id { margin: 0 0 10px; color: var(--ink-soft); font: italic 14px var(--serif); }
.tag-cat { display: flex; align-items: center; gap: 7px; margin: 0 0 12px; font-size: 13px; }
.tag-cat #tagCount { color: var(--ink-soft); }
.tag-path { list-style: none; margin: 0 0 14px; padding: 10px 0 0; border-top: 1px dashed rgba(42, 36, 32, 0.3); display: flex; flex-wrap: wrap; gap: 2px 0; font-size: 12.5px; }
.tag-path li { display: inline; }
.tag-path li + li::before { content: "\203A"; margin: 0 6px; color: var(--ink-soft); }
.tag-path button { border: 0; background: none; padding: 0; color: var(--ink-soft); text-decoration: underline; text-decoration-color: rgba(42, 36, 32, 0.25); text-underline-offset: 2px; }
.tag-path button:hover { color: var(--ink); }
.tag-path li:last-child button { color: var(--ink); text-decoration: none; font-weight: 600; }
.tag-actions { display: flex; gap: 6px; }
.tag-actions button { flex: 1; padding: 6px 0; border-radius: var(--r-s); border: 1px solid rgba(42, 36, 32, 0.25); background: rgba(255, 255, 255, 0.35); color: var(--ink); font-size: 13px; }
.tag-actions button:hover { background: rgba(255, 255, 255, 0.7); }

.wiki { display: flex; flex-direction: column; gap: 10px; }
.wiki img { width: 100%; max-height: 220px; object-fit: contain; background: #fff; border-radius: var(--r-m); }
.wiki p { margin: 0; color: var(--bone); max-width: 70ch; }
.wiki a { font-size: 13px; }

/* ---------- quiz ---------- */
.quiz { display: flex; flex-direction: column; gap: 12px; }
.quiz h2 { font: 600 20px/1.3 var(--serif); margin: 0; }
.quiz > div { display: flex; flex-direction: column; gap: 12px; }
.quiz select { background: var(--stage); border: 1px solid var(--line); border-radius: var(--r-s); padding: 5px 8px; }
.primary { background: var(--film); color: var(--film-ink); border: 0; border-radius: var(--r-m); padding: 8px 14px; font-weight: 600; }
.primary:hover { filter: brightness(1.08); }
.quiz-row { display: flex; gap: 8px; flex-wrap: wrap; }
.quiz-row button:not(.primary) { background: none; border: 1px solid var(--line); border-radius: var(--r-m); padding: 7px 12px; }
.quiz-progress { margin: 0; color: var(--muted); font-size: 13px; font-variant-numeric: tabular-nums; }
.quiz-options { display: flex; flex-direction: column; gap: 6px; }
.quiz-options button { text-align: left; padding: 9px 12px; border-radius: var(--r-m); border: 1px solid var(--line); background: var(--panel-2); }
.quiz-options button:hover:not(:disabled) { border-color: var(--film); }
.quiz-options button.right { border-color: var(--good); background: rgba(155, 211, 163, 0.16); }
.quiz-options button.wrong { border-color: var(--warn); background: rgba(228, 164, 135, 0.16); }
.quiz-feedback { margin: 0; min-height: 1.4em; }
.quiz-feedback.right { color: var(--good); }
.quiz-feedback.wrong { color: var(--warn); }
.missed { margin: 0; padding-left: 18px; }
.missed button { border: 0; background: none; padding: 2px 0; color: var(--film); text-align: left; }

/* ---------- status bar ---------- */
.statusbar { grid-area: status; display: flex; align-items: center; gap: 14px; padding: 0 14px; background: var(--panel); border-top: 1px solid var(--line); font-size: 12px; color: var(--muted); white-space: nowrap; overflow: hidden; }
.statusbar .attr { margin-left: auto; overflow: hidden; text-overflow: ellipsis; }
.text-btn { border: 0; background: none; padding: 0; color: var(--film); text-decoration: underline; text-underline-offset: 2px; font-size: inherit; }

/* ---------- dialogs ---------- */
dialog { border: 1px solid var(--line); border-radius: 12px; background: var(--panel); color: var(--bone); padding: 0; width: min(560px, 92vw); }
dialog::backdrop { background: rgba(8, 10, 14, 0.6); }
.dialog-body { padding: 22px 24px 18px; display: flex; flex-direction: column; gap: 12px; }
.dialog-body h2 { font: 600 21px var(--serif); margin: 0; }
.dialog-body p { margin: 0; max-width: 68ch; }
#dataInfo { background: var(--stage); border-radius: var(--r-m); padding: 10px 12px; font-size: 13px; color: var(--muted); }
#dataInfo strong { color: var(--bone); font-weight: 600; }
.choices { display: flex; flex-direction: column; gap: 8px; margin-top: 4px; }
.choices button:not(.primary) { background: none; border: 1px solid var(--line); border-radius: var(--r-m); padding: 8px 14px; text-align: left; }
.choices button:disabled, .primary:disabled { opacity: 0.5; cursor: progress; }
.progress .bar { height: 6px; border-radius: 3px; background: var(--stage); overflow: hidden; }
.progress #dlBar { height: 100%; width: 0; background: var(--film); transition: width 0.2s; }
.progress p { font-size: 12.5px; color: var(--muted); margin-top: 6px; }
.dialog-foot { display: flex; gap: 16px; font-size: 12.5px; }
.dialog-close { display: flex; justify-content: flex-end; }
.dialog-close button { background: none; border: 1px solid var(--line); border-radius: var(--r-m); padding: 6px 16px; }
pre { background: var(--stage); padding: 10px 12px; border-radius: var(--r-m); margin: 0; }
.keys { display: grid; grid-template-columns: 90px 1fr; gap: 6px 12px; margin: 0; }
.keys dt { font-weight: 600; color: var(--film); }
.keys dd { margin: 0; }

@media (max-width: 1150px) {
  #app { grid-template-columns: 240px 1fr 290px; }
  .seg.small, .stage-hint { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}

/* ---------- v0.3 additions ---------- */
.tag-latin { margin: -2px 0 4px; font: italic 15px var(--serif); color: var(--ink); }
.tag-note { margin: 0 0 12px; padding: 6px 8px; border-radius: var(--r-s); background: rgba(42, 36, 32, 0.08); color: var(--ink-soft); font-size: 12.5px; }
.atlas-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.atlas-list li { border: 1px solid var(--line); border-radius: var(--r-m); padding: 12px 14px; display: flex; flex-direction: column; gap: 6px; }
.atlas-list li.active { border-color: var(--film); }
.atlas-list .head { display: flex; align-items: baseline; gap: 10px; }
.atlas-list .title { font-weight: 600; flex: 1; }
.atlas-list .state { font-size: 12px; color: var(--muted); }
.atlas-list li.active .state { color: var(--film); }
.atlas-list p { font-size: 13px; color: var(--muted); margin: 0; }
.atlas-list .row-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.atlas-list .row-actions button:not(.primary) { background: none; border: 1px solid var(--line); border-radius: var(--r-m); padding: 6px 12px; font-size: 13px; }
.atlas-list .row-actions button:disabled { opacity: 0.5; cursor: progress; }
.atlas-list code { background: var(--stage); padding: 2px 6px; border-radius: var(--r-s); font-size: 12.5px; }
dialog { width: min(640px, 94vw); max-height: 90vh; }
.pane-foot .check { font-size: 13px; }

/* ---------- about ---------- */
.about .dialog-body { gap: 10px; }
.about-logo { width: 112px; height: 112px; object-fit: contain; align-self: flex-start; margin-bottom: 4px; border-radius: 10px; }
.about h3 { font: 600 15px var(--serif); margin: 8px 0 0; }
.about-contact { display: grid; grid-template-columns: 110px 1fr; gap: 6px 12px; margin: 4px 0; font-size: 13.5px; }
.about-contact dt { color: var(--muted); }
.about-contact dd { margin: 0; overflow-wrap: anywhere; }
.lab-credit { color: var(--muted); text-decoration: none; white-space: nowrap; }
.lab-credit:hover { color: var(--film); text-decoration: underline; }
.loading { flex-direction: column; gap: 10px; }
.loading .bar { width: min(320px, 60%); height: 4px; border-radius: 2px; background: var(--panel-2); overflow: hidden; }
.loading .bar > div { height: 100%; width: 0; background: var(--film); }
/* One overall loading progress; preparation has no invented percentage. */
#loadingText { max-width:min(440px,85%); text-align:center; line-height:1.6; }
.loading.indeterminate .bar > div { width:35% !important; animation:model-wait 1.3s ease-in-out infinite alternate; }
@keyframes model-wait { from { transform:translateX(-100%); } to { transform:translateX(285%); } }
@media (prefers-reduced-motion:reduce) { .loading.indeterminate .bar > div { animation:none; transform:translateX(90%); } }
#aboutText { text-align:justify; }
#aboutCredit { font-size:.7rem; color:var(--muted); opacity:.65; }
#aboutCredit a { color:inherit; }