:root {
  --paper: #ffffff;
  --ink: #111111;
  --ink-2: #4a4a4a;
  --ink-3: #8a8a8a;
  --rule: #e4e4e0;
  --wash: #f6f6f3;
  --accent: #b3261e;
  --serif: 'EB Garamond', 'Iowan Old Style', 'Palatino Linotype', Palatino, Georgia, serif;
  --mono: 'IBM Plex Mono', ui-monospace, 'SFMono-Regular', Menlo, Consolas, monospace;
  --panel-w: 340px;
  --index-w: 240px;
  --gutter: 20px;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.45;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

#scene { position: fixed; inset: 0; width: 100%; height: 100%; display: block; touch-action: none; cursor: grab; }
#scene.dragging { cursor: grabbing; }
#scene.pointing { cursor: pointer; }

button { font: inherit; color: inherit; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- masthead ---------- */
.masthead {
  position: fixed; top: var(--gutter); left: var(--gutter);
  pointer-events: none; max-width: calc(100vw - 2 * var(--gutter));
}
.eyebrow {
  margin: 0 0 2px; font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-3);
}
.masthead h1 { margin: 0; font-weight: 500; font-size: 34px; letter-spacing: -0.01em; line-height: 1.05; }
.subtitle { margin: 2px 0 0; font-style: italic; color: var(--ink-2); font-size: 17px; }

/* ---------- panels ---------- */
.panel {
  position: fixed; background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
}
.index {
  top: 128px; left: var(--gutter); bottom: 96px; width: var(--index-w);
  display: flex; flex-direction: column; border-top: 1px solid var(--ink);
}
.index-head { padding: 10px 0 8px; }
#search {
  width: 100%; border: 0; border-bottom: 1px solid var(--rule); background: transparent;
  font: 15px var(--serif); font-style: italic; padding: 4px 0; color: var(--ink); outline: none;
}
#search:focus { border-bottom-color: var(--ink); }
.index-list { overflow-y: auto; flex: 1; padding-right: 6px; scrollbar-width: thin; }
.group-title {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--ink-3); margin: 14px 0 4px; display: flex; justify-content: space-between; align-items: baseline;
}
.group-title:first-child { margin-top: 4px; }
.item { display: flex; align-items: center; gap: 4px; }
.item-name {
  flex: 1; text-align: left; background: none; border: 0; padding: 3px 0; cursor: pointer;
  font-size: 16px; color: var(--ink); line-height: 1.25; display: flex; align-items: baseline; gap: 8px;
}
.item-name .num { font-family: var(--mono); font-size: 10px; color: var(--ink-3); min-width: 18px; }
.item-name:hover .label, .item.hover .item-name .label { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; }
.item.active .item-name .label { font-style: italic; color: var(--accent); }
.item.active .item-name .num { color: var(--accent); }
.item.hidden .item-name { color: var(--ink-3); }
.eye {
  background: none; border: 0; padding: 3px; cursor: pointer; opacity: 0.35; line-height: 0; border-radius: 4px;
}
.eye:hover, .eye:focus-visible { opacity: 1; }
.eye svg { width: 16px; height: 16px; fill: none; stroke: var(--ink); stroke-width: 1.4; }
.item.hidden .eye { opacity: 0.8; }

.info {
  top: var(--gutter); right: var(--gutter); bottom: 96px; width: var(--panel-w);
  overflow-y: auto; padding: 0 4px 24px 0; scrollbar-width: thin;
}
.info .kicker {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-3);
  display: flex; justify-content: space-between; gap: 8px; border-top: 1px solid var(--ink); padding-top: 8px;
}
.info h2 { font-size: 30px; font-weight: 500; margin: 6px 0 0; line-height: 1.1; }
.info .latin { font-style: italic; color: var(--ink-2); margin: 2px 0 12px; }
.info .summary { margin: 0 0 12px; font-size: 17.5px; }
.info h3 {
  font-family: var(--mono); font-weight: 500; font-size: 10.5px; letter-spacing: 0.12em; text-transform: uppercase;
  margin: 18px 0 6px; padding-bottom: 4px; border-bottom: 1px solid var(--rule); color: var(--ink);
}
.info ul { margin: 0; padding: 0; list-style: none; }
.info li { position: relative; padding-left: 16px; margin: 0 0 6px; font-size: 15.5px; color: #222; }
.info li::before { content: '—'; position: absolute; left: 0; color: var(--ink-3); }
.info .note { font-size: 13.5px; color: var(--ink-2); font-style: italic; margin-top: 18px; border-top: 1px solid var(--rule); padding-top: 10px; }
.info .actions { display: flex; gap: 8px; margin: 4px 0 8px; flex-wrap: wrap; }

.chip-btn {
  background: var(--paper); border: 1px solid var(--ink); border-radius: 999px; padding: 4px 12px; cursor: pointer;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
}
.chip-btn:hover { background: var(--ink); color: var(--paper); }
.index-toggle { display: none; }

/* ---------- toolbar ---------- */
.toolbar {
  position: fixed; left: 50%; bottom: 22px; transform: translateX(-50%);
  display: flex; align-items: center; gap: 4px; padding: 6px;
  background: var(--paper); border: 1px solid var(--ink); border-radius: 999px;
  box-shadow: 0 1px 0 var(--ink);
}
.tool {
  height: 34px; min-width: 34px; padding: 0 10px; border: 0; border-radius: 999px; background: none; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.04em;
}
.tool svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; }
.tool:hover { background: var(--wash); }
.tool[aria-pressed='true'] { background: var(--ink); color: var(--paper); }
.tool.primary { padding: 0 14px 0 12px; font-size: 12.5px; text-transform: uppercase; letter-spacing: 0.1em; }
.views { display: flex; gap: 0; }
.views .tool { min-width: 30px; padding: 0 6px; }
.divider { width: 1px; height: 22px; background: var(--rule); margin: 0 4px; }
.slider { display: flex; align-items: center; padding: 0 6px; }
input[type='range'] {
  -webkit-appearance: none; appearance: none; width: 110px; height: 22px; background: transparent; cursor: pointer;
}
input[type='range']::-webkit-slider-runnable-track { height: 1px; background: var(--ink); }
input[type='range']::-moz-range-track { height: 1px; background: var(--ink); }
input[type='range']::-webkit-slider-thumb {
  -webkit-appearance: none; width: 13px; height: 13px; border-radius: 50%; background: var(--paper); border: 1px solid var(--ink); margin-top: -6px;
}
input[type='range']::-moz-range-thumb { width: 12px; height: 12px; border-radius: 50%; background: var(--paper); border: 1px solid var(--ink); }
button:focus-visible, input:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.swatch {
  display: inline-block; width: 9px; height: 9px; border-radius: 50%; border: 1px solid var(--ink); flex: none;
  align-self: center; margin-left: -4px;
}

/* ---------- hover readout ---------- */
#readout {
  position: fixed; left: 50%; bottom: 74px; transform: translateX(-50%); pointer-events: none;
  font-size: 15px; font-style: italic; color: var(--ink-2); white-space: nowrap; opacity: 0; transition: opacity 0.15s;
  text-shadow: 0 0 3px #fff, 0 0 3px #fff;
}
#readout.show { opacity: 1; }
#readout .side { font-family: var(--mono); font-style: normal; font-size: 10px; color: var(--ink-3); margin-left: 6px; text-transform: uppercase; letter-spacing: 0.08em; }
.tool.run[aria-pressed='true'] svg { animation: spin 1.2s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.tool svg.fill { fill: currentColor; stroke: none; }

#compass { position: fixed; left: calc(var(--index-w) + var(--gutter) + 16px); bottom: 26px; width: 74px; height: 74px; pointer-events: none; }
#compass line { stroke-width: 1.2; }
#compass text { font-family: var(--mono); font-size: 11px; text-anchor: middle; dominant-baseline: central; }

/* ---------- loader ---------- */
.loader {
  position: fixed; inset: 0; display: grid; place-items: center; background: var(--paper); z-index: 10; transition: opacity 0.6s;
}
.loader.done { opacity: 0; pointer-events: none; }
.loader-inner { text-align: center; }
.loader-mark { width: 120px; fill: none; stroke: var(--ink); stroke-width: 1.3; stroke-linecap: round; stroke-dasharray: 320; animation: draw 2.4s ease-in-out infinite alternate; }
@keyframes draw { from { stroke-dashoffset: 320; } to { stroke-dashoffset: 0; } }
.loader p { font-style: italic; color: var(--ink-2); margin-top: 10px; }
.noscript { position: fixed; inset: 0; display: grid; place-items: center; }

/* ---------- small screens ---------- */
@media (max-width: 900px) {
  :root { --gutter: 16px; }
  .masthead h1 { font-size: 26px; }
  .subtitle { font-size: 15px; }
  .index-toggle { display: inline-block; position: fixed; top: 22px; right: var(--gutter); z-index: 3; }
  .index {
    top: 64px; right: var(--gutter); left: auto; bottom: auto; max-height: 60vh; width: min(280px, calc(100vw - 32px));
    padding: 0 12px 10px; border: 1px solid var(--ink); z-index: 3; display: none;
  }
  .index.open { display: flex; }
  .info {
    top: auto; left: 0; right: 0; bottom: 0; width: auto; max-height: 38vh; padding: 12px 16px 84px;
    border-top: 1px solid var(--ink);
  }
  .info.collapsed { max-height: 118px; overflow: hidden; }
  .info .kicker { border-top: 0; padding-top: 0; }
  .info h2 { font-size: 24px; }
  #readout { bottom: 62px; }
  .toolbar { bottom: 12px; max-width: calc(100vw - 16px); overflow-x: auto; z-index: 4; }
  .slider input { width: 70px; }
  .views .tool { min-width: 26px; padding: 0 4px; }
  #compass { left: auto; right: 12px; bottom: auto; top: 64px; width: 58px; height: 58px; }
  .index.open ~ #compass { display: none; }
}
@media (max-width: 520px) {
  .tool.primary span, .tool.run span { display: none; }
  .tool.primary { padding: 0 10px; }
  .divider { margin: 0 1px; }
  .slider input { width: 56px; }
}