/* ==========================================================================
   Microreactor: UI stylesheet
   Design tokens mirror aalo.com: warm black, off-white, space grey, Aspekta
   (Inter fallback), hairline rules, ruler ticks, dot ornaments, quiet UI.
   ========================================================================== */

@font-face { font-family: 'Aspekta'; src: url('fonts/Aspekta-300.woff2') format('woff2'); font-weight: 300; font-display: swap; }
@font-face { font-family: 'Aspekta'; src: url('fonts/Aspekta-400.woff2') format('woff2'); font-weight: 400; font-display: swap; }
@font-face { font-family: 'Aspekta'; src: url('fonts/Aspekta-500.woff2') format('woff2'); font-weight: 500; font-display: swap; }
@font-face { font-family: 'Aspekta'; src: url('fonts/Aspekta-600.woff2') format('woff2'); font-weight: 600; font-display: swap; }

:root {
  --black: #0d0a05;
  --white: #fffcf4;
  --grey: #78797f;
  --soft: #d9d9d9;
  --error: #d86e4b;

  --bg: var(--black);
  --fg: var(--white);
  --fg-2: var(--grey);
  --fg-3: rgba(255, 252, 244, 0.55);
  --line: rgba(255, 252, 244, 0.14);
  --line-strong: rgba(255, 252, 244, 0.32);
  --tick: rgba(255, 252, 244, 0.3);
  --surface: rgba(255, 252, 244, 0.06);
  --surface-2: rgba(255, 252, 244, 0.1);
  --glass: rgba(13, 10, 5, 0.74);
  --glass-2: rgba(13, 10, 5, 0.9);

  --font: 'Aspekta', 'Inter', system-ui, -apple-system, 'Helvetica Neue', Arial, sans-serif;
  --fs-label: 0.75rem;
  --fs-small: 0.875rem;
  --fs-body: 0.9375rem;
  --fs-h3: 1.375rem;
  --track-label: 0.08em;
  --track-tight: -0.03em;
  --radius: 12px;
  --radius-sm: 6px;
  --radius-pill: 999px;
  --ease: cubic-bezier(.22, .61, .36, 1);
  --dur: .45s;
  --gutter: 18px;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--fg); font-family: var(--font); font-weight: 400; overflow: hidden; -webkit-font-smoothing: antialiased; }
button, input { font: inherit; color: inherit; letter-spacing: inherit; }
button { cursor: pointer; background: none; border: 0; padding: 0; }

#app { position: fixed; inset: 0; overflow: hidden; }
#c { position: absolute; inset: 0; width: 100%; height: 100%; display: block; touch-action: none; }
#labels { position: absolute; inset: 0; pointer-events: none; overflow: hidden; z-index: 1; }

/* ---------- Ornaments ---------- */
.dot { display: inline-block; width: .5em; height: .5em; border-radius: 50%; background: currentColor; flex: none; vertical-align: middle; }
.dot--ring { background: transparent; border: 1.5px solid currentColor; }
.dot--dashed { background: transparent; border: 1.5px dashed currentColor; animation: dot-spin 6s linear infinite; }
.dot--xl { width: 28px; height: 28px; border-width: 1.5px; }
@keyframes dot-spin { to { transform: rotate(360deg); } }
.eyebrow { display: inline-flex; align-items: center; gap: .6em; font-size: var(--fs-label); letter-spacing: var(--track-label); text-transform: uppercase; color: var(--fg-2); }
.rule { border: 0; border-top: 1px solid var(--line); margin: 14px 0; }
.ruler-v {
  position: absolute; top: 24px; bottom: 90px; width: 14px; pointer-events: none; z-index: 5;
  background-image: repeating-linear-gradient(to bottom, var(--tick) 0 1px, transparent 1px 16px);
  background-size: 8px 100%; background-repeat: no-repeat;
}
.ruler-v::after { content: ''; position: absolute; inset: 0; width: 14px; background-image: repeating-linear-gradient(to bottom, var(--tick) 0 1px, transparent 1px 80px); }
.ruler-v--left { left: var(--gutter); background-position: left top; }
.ruler-v--left::after { background-position: left top; }
.ruler-v--right { right: var(--gutter); background-position: right top; }
.ruler-v--right::after { background-position: right top; }
#stamp { position: absolute; left: calc(var(--gutter) + 22px); top: 22px; z-index: 5; display: flex; gap: 18px; align-items: baseline; pointer-events: none; }
.fig { font-size: var(--fs-label); letter-spacing: .02em; color: var(--fg); opacity: .85; }
.coords { font-size: var(--fs-label); letter-spacing: .25em; color: var(--fg-3); white-space: nowrap; }

/* ---------- Labels (CSS2D) ---------- */
.lbl {
  pointer-events: auto; cursor: pointer;
  display: flex; align-items: center; gap: 8px;
  font-size: 12px; font-weight: 500; letter-spacing: .02em;
  color: var(--fg); background: var(--glass); border: 1px solid var(--line);
  padding: 5px 10px; border-radius: var(--radius-pill);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  transform: translate(22px, calc(-100% - 16px)); white-space: nowrap; user-select: none;
  transition: opacity .25s, border-color .2s, background .2s, color .2s;
}
.lbl:hover { border-color: var(--line-strong); }
.lbl.active { border-color: var(--line-strong); background: var(--glass-2); color: var(--white); }
.lbl.dim { opacity: .25; }
.lbl.off { opacity: 0; pointer-events: none; }

/* ---------- Loading ---------- */
#loading { position: absolute; inset: 0; display: flex; flex-direction: column; gap: 22px; align-items: center; justify-content: center; background: var(--bg); z-index: 50; color: var(--fg); transition: opacity .7s var(--ease); }
#loading.out { opacity: 0; pointer-events: none; }
.ltxt { color: var(--fg-2); font-size: var(--fs-label); letter-spacing: .25em; text-transform: uppercase; text-align: center; line-height: 1.7; }

/* ---------- Text controls ---------- */
.tlink { font-size: var(--fs-small); color: var(--fg); padding: 6px 0; border-bottom: 1px solid transparent; transition: border-color .2s, color .2s; }
.tlink:hover { border-bottom-color: var(--line-strong); }
.tlink.on { color: var(--fg); border-bottom-color: var(--white); }
.xbtn { width: 28px; height: 28px; border-radius: 50%; color: var(--fg-2); display: inline-flex; align-items: center; justify-content: center; font-size: 12px; border: 1px solid transparent; transition: color .2s, border-color .2s; }
.xbtn:hover { color: var(--fg); border-color: var(--line-strong); }

/* ---------- Info card ---------- */
#card {
  position: absolute; right: calc(var(--gutter) + 26px); top: 22px; width: 340px; max-height: calc(100% - 140px); z-index: 16;
  background: var(--glass); border: 1px solid var(--line); border-radius: var(--radius);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  padding: 18px 20px 16px; overflow-y: auto;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
#card.hidden { opacity: 0; transform: translateX(16px); pointer-events: none; }
#cardClose { position: absolute; top: 12px; right: 12px; }
#card h2 { margin: 12px 0 10px; font-size: var(--fs-h3); line-height: 1.15; font-weight: 500; letter-spacing: var(--track-tight); padding-right: 28px; }
#card p { margin: 0 0 14px; font-size: var(--fs-body); line-height: 1.5; color: var(--fg-3); }
#cardSpecs { margin: 0 0 6px; display: grid; grid-template-columns: 1fr 1.3fr; gap: 0 14px; font-size: var(--fs-small); }
#cardSpecs dt, #cardSpecs dd { margin: 0; padding: 8px 0; border-top: 1px solid var(--line); }
#cardSpecs dt { color: var(--fg-2); }
#cardSpecs dd { color: var(--fg); }
.cardBtns { display: flex; gap: 22px; flex-wrap: wrap; padding-top: 6px; border-top: 1px solid var(--line); }

/* ---------- Bottom controls ---------- */
#tools {
  position: absolute; left: 50%; bottom: 16px; transform: translateX(-50%); z-index: 20;
  display: flex; align-items: center; gap: 10px; padding: 7px 12px;
  background: var(--glass); border: 1px solid var(--line); border-radius: var(--radius-pill);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  max-width: calc(100% - 28px);
}
.vr { width: 1px; height: 22px; background: var(--line); flex: none; }
.trow { display: flex; align-items: center; gap: 10px; }
.tgroup { display: flex; align-items: center; gap: 4px; }
.tgroup.slider { gap: 8px; }
.tgroup.slider label { font-size: 0.7rem; letter-spacing: var(--track-label); text-transform: uppercase; color: var(--fg-2); }
.tgroup.icons .tbtn { width: 30px; padding: 0; justify-content: center; }
input[type=range] { -webkit-appearance: none; appearance: none; width: 84px; height: 1px; background: var(--line-strong); outline: none; margin: 0; }
input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 12px; height: 12px; border-radius: 50%; background: var(--white); border: 0; cursor: pointer; box-shadow: 0 0 0 4px var(--black); }
input[type=range]::-moz-range-thumb { width: 12px; height: 12px; border-radius: 50%; background: var(--white); border: 0; cursor: pointer; }
.tbtn {
  height: 30px; padding: 0 7px; display: inline-flex; align-items: center; gap: 6px;
  font-size: 0.7rem; letter-spacing: var(--track-label); text-transform: uppercase; color: var(--fg-2);
  border-radius: var(--radius-pill); white-space: nowrap; transition: color .2s, background .2s;
}
.tbtn::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: currentColor; opacity: 0; transition: opacity .2s; }
.tbtn:hover { color: var(--fg); background: var(--surface); }
.tbtn.on { color: var(--fg); }
.tbtn.on::before { opacity: 1; }
.tbtn.tourOn { color: var(--fg); }
.tbtn.tourOn::before { opacity: 1; background: transparent; border: 1.5px dashed currentColor; width: 6px; height: 6px; animation: dot-spin 6s linear infinite; }
.dd { position: relative; }
.menu {
  position: absolute; bottom: 44px; left: 50%; transform: translateX(-50%); min-width: 190px; padding: 8px;
  background: var(--glass-2); border: 1px solid var(--line); border-radius: var(--radius);
  display: flex; flex-direction: column; gap: 2px; backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
}
.menu.hidden { display: none; }
.menu label { display: flex; align-items: center; gap: 10px; padding: 7px 10px; border-radius: var(--radius-sm); font-size: var(--fs-small); color: var(--fg); cursor: pointer; }
.menu label:hover { background: var(--surface); }
.menu hr { border: 0; border-top: 1px solid var(--line); margin: 6px 0; }
.menu input[type=checkbox] { accent-color: var(--white); width: 14px; height: 14px; }
.menu .mi { text-align: left; padding: 7px 10px; border-radius: var(--radius-sm); font-size: var(--fs-small); color: var(--fg); }
.menu .mi.on::before { content: ""; display: inline-block; width: 5px; height: 5px; border-radius: 50%; background: currentColor; margin-right: 8px; vertical-align: middle; }
.menu .mi:hover { background: var(--surface); }

/* Parts popover */
.menu.panel { padding: 14px 16px 12px; width: min(720px, calc(100vw - 40px)); }
#partList { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 14px 22px; }
.grp { grid-column: 1 / -1; display: none; }
.pgroup { display: flex; flex-direction: column; gap: 2px; }
.pgroup h4 { margin: 0 0 6px; font-size: var(--fs-label); letter-spacing: var(--track-label); text-transform: uppercase; color: var(--fg-2); font-weight: 400; padding-bottom: 6px; border-bottom: 1px solid var(--line); }
.pi { display: flex; align-items: center; gap: 8px; text-align: left; padding: 5px 6px; border-radius: var(--radius-sm); font-size: var(--fs-small); color: var(--fg-3); }
.pi::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: var(--line-strong); flex: none; }
.pi:hover { color: var(--fg); background: var(--surface); }
.pi.active { color: var(--fg); }
.pi.active::before { background: var(--white); }
.pi.hiddenPart { opacity: .4; }

/* Search */
#searchWrap { position: relative; }
#search {
  width: 150px; height: 30px; padding: 0 10px 0 22px; border: 0; border-bottom: 1px solid var(--line-strong); background: transparent; outline: none;
  font-size: var(--fs-small); color: var(--fg); border-radius: 0;
}
#searchWrap::before { content: ""; position: absolute; left: 4px; top: 50%; width: 9px; height: 9px; border: 1.5px solid var(--fg-2); border-radius: 50%; transform: translateY(-60%); pointer-events: none; }
#search:focus { border-bottom-color: var(--white); }
#search::placeholder { color: var(--fg-2); }
#search::-webkit-search-cancel-button { -webkit-appearance: none; }
#results {
  position: absolute; bottom: 40px; left: 0; width: 300px; display: none; flex-direction: column;
  background: var(--glass-2); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); max-height: 50vh; overflow-y: auto; padding: 6px;
}
#results.open { display: flex; }
.res { padding: 8px 10px; display: flex; justify-content: space-between; gap: 10px; cursor: pointer; font-size: var(--fs-small); border-radius: var(--radius-sm); color: var(--fg); }
.res small { color: var(--fg-2); font-size: var(--fs-label); letter-spacing: var(--track-label); text-transform: uppercase; }
.res:hover, .res.sel { background: var(--surface); }
.res.none { color: var(--fg-2); cursor: default; }

/* ---------- Tooltip, banner, hint ---------- */
#tip {
  position: absolute; z-index: 30; pointer-events: none; font-size: 12px; font-weight: 500; letter-spacing: .02em;
  background: var(--glass-2); border: 1px solid var(--line); padding: 5px 10px; border-radius: var(--radius-pill);
  transform: translate(14px, 14px); white-space: nowrap;
}
#tip.hidden { display: none; }
#tourBar {
  position: absolute; top: 22px; left: 50%; transform: translateX(-50%); z-index: 18;
  display: flex; align-items: center; gap: 12px; padding: 7px 8px 7px 16px;
  background: var(--glass); border: 1px solid var(--line); border-radius: var(--radius-pill);
  font-size: var(--fs-small); color: var(--fg); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
}
#tourBar .dot { color: var(--fg-2); }
#tourBar.hidden { display: none; }
#hint { position: absolute; bottom: calc(var(--barH, 60px) + 18px); left: 50%; transform: translateX(-50%); z-index: 10; font-size: var(--fs-label); letter-spacing: var(--track-label); text-transform: uppercase; color: var(--fg-2); pointer-events: none; transition: opacity .6s; }
#hint.out { opacity: 0; }

/* ---------- Help ---------- */
#help { position: absolute; inset: 0; z-index: 40; background: rgba(13,10,5,.6); display: flex; align-items: center; justify-content: center; backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); }
#help.hidden { display: none; }
.helpBox { position: relative; width: min(520px, 92vw); background: var(--glass-2); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 24px 18px; }
#helpClose { position: absolute; top: 12px; right: 12px; }
.hgrid { display: grid; grid-template-columns: 92px 1fr; gap: 10px 16px; font-size: var(--fs-small); margin-top: 16px; }
.hgrid b { color: var(--fg); font-weight: 500; }
.hgrid span { color: var(--fg-3); }
.fine { margin: 0; font-size: var(--fs-label); color: var(--fg-2); line-height: 1.55; letter-spacing: .01em; }

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-thumb { background: var(--line-strong); border-radius: 4px; }

@media (max-width: 1180px) {
  #tools { flex-wrap: wrap; justify-content: center; border-radius: 18px; row-gap: 2px; padding: 6px 12px; }
  #tools > .vr { display: none; }
}

/* ---------- Mobile ---------- */
@media (max-width: 900px) {
  .ruler-v, #stamp { display: none; }
  #card { right: 0; left: 0; top: auto; bottom: 0; width: auto; max-height: 50%; border-radius: var(--radius) var(--radius) 0 0; padding-bottom: 84px; }
  #card.hidden { transform: translateY(30px); }
  #tools { bottom: 10px; left: 10px; right: 10px; transform: none; gap: 6px; padding: 6px 10px; flex-wrap: nowrap; overflow-x: auto; justify-content: flex-start; border-radius: var(--radius); max-width: none; }
  #tools::-webkit-scrollbar { display: none; }
  .trow { flex-wrap: nowrap; gap: 4px; }
  #tools > .vr { display: inline-block; }
  #tools::-webkit-scrollbar { display: none; }
  .tgroup.slider label { display: none; }
  input[type=range] { width: 76px; }
  #search { width: 130px; }
  #results { width: 260px; }
  .menu { left: 0; transform: none; }
  .menu.panel { position: fixed; left: 10px; right: 10px; bottom: 60px; width: auto; max-height: 60vh; overflow-y: auto; transform: none; }
  .lbl { font-size: 11px; padding: 4px 8px; }
  #hint { display: none; }
  #tourBar { top: 12px; font-size: var(--fs-label); }
}


/* ---------- Guide drawer (crawlable article) ---------- */
#guide {
  position: absolute; top: 22px; right: calc(var(--gutter) + 26px); bottom: 86px; width: 420px; z-index: 17;
  background: var(--glass-2); border: 1px solid var(--line); border-radius: var(--radius);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
#guide.hidden { opacity: 0; transform: translateX(20px); pointer-events: none; }
.gClose { position: absolute; top: 12px; right: 12px; z-index: 2; }
.gScroll { position: absolute; inset: 0; overflow-y: auto; padding: 22px 24px 28px; }
.gHead h1 { margin: 12px 0 14px; font-size: 1.55rem; line-height: 1.12; font-weight: 500; letter-spacing: var(--track-tight); padding-right: 30px; }
.gHead .lead { margin: 0 0 12px; font-size: var(--fs-body); line-height: 1.55; color: var(--fg-3); }
.gGroup { margin-top: 28px; }
.gGroup h2 { margin: 0 0 6px; padding-bottom: 8px; border-bottom: 1px solid var(--line-strong); font-size: var(--fs-label); letter-spacing: var(--track-label); text-transform: uppercase; font-weight: 500; color: var(--fg-2); }
.gPart { padding: 16px 0 14px; border-bottom: 1px solid var(--line); }
.gPart h3 { margin: 0 0 8px; font-size: 1.05rem; font-weight: 500; letter-spacing: -0.01em; }
.gPart p { margin: 0 0 10px; font-size: var(--fs-small); line-height: 1.55; color: var(--fg-3); }
.gPart dl { margin: 0 0 8px; display: grid; grid-template-columns: 1fr 1.3fr; gap: 3px 12px; font-size: 0.8125rem; }
.gPart dt { color: var(--fg-2); }
.gPart dd { margin: 0; color: var(--fg); }
.gShow { font-size: var(--fs-label); letter-spacing: var(--track-label); text-transform: uppercase; text-decoration: none; color: var(--fg); }
.gFoot p { margin: 24px 0 0; font-size: var(--fs-label); color: var(--fg-2); line-height: 1.55; }
.gFoot .gLinks { display: flex; gap: 18px; flex-wrap: wrap; margin-top: 28px; }
.gFoot .gLinks a { color: var(--fg); }

/* ---------- Physics panel ---------- */
#physics {
  position: absolute; top: 22px; left: calc(var(--gutter) + 26px); width: 360px; max-height: calc(100% - 130px); overflow-y: auto; z-index: 17;
  background: var(--glass-2); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px 12px;
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
#physics.hidden { opacity: 0; transform: translateX(-20px); pointer-events: none; }
.pClose { position: absolute; top: 12px; right: 12px; }
.pStatus { margin: 10px 0 10px; font-size: var(--fs-small); line-height: 1.45; color: var(--fg); min-height: 2.9em; }
.pRow { padding: 8px 0; border-top: 1px solid var(--line); }
.pRow label { display: flex; justify-content: space-between; font-size: var(--fs-label); letter-spacing: var(--track-label); text-transform: uppercase; color: var(--fg-2); margin-bottom: 10px; }
.pRow label span { color: var(--fg); letter-spacing: 0; text-transform: none; font-size: var(--fs-small); }
.pRow input[type=range] { width: 100%; }
.pToggles { display: flex; gap: 8px; flex-wrap: wrap; }
.pt { display: inline-flex; align-items: center; gap: 8px; padding: 7px 11px; border: 1px solid var(--line); border-radius: var(--radius-pill); font-size: var(--fs-label); letter-spacing: .04em; text-transform: uppercase; color: var(--fg-2); transition: color .2s, border-color .2s, background .2s; }
.pt .dot { width: 6px; height: 6px; background: var(--line-strong); }
.pt em { font-style: normal; color: var(--fg-2); }
.pt:hover { border-color: var(--line-strong); color: var(--fg); }
.pt.on { color: var(--fg); border-color: var(--line-strong); }
.pt.on .dot { background: #5ad1ff; box-shadow: 0 0 8px #5ad1ff; }
.pt.on em { color: var(--fg); }
.pt.off .dot { background: var(--error); box-shadow: 0 0 8px var(--error); }
.pt.danger { border-color: rgba(216,110,75,.45); color: #f0a98f; }
.pt.danger .dot { background: var(--error); }
.pt.danger.on { background: rgba(216,110,75,.16); color: #ffd9c9; }
#phChart { display: block; width: 100%; height: 64px; margin-top: 8px; border-top: 1px solid var(--line); }
.pLegend { display: flex; gap: 16px; font-size: var(--fs-label); color: var(--fg-2); margin: 6px 0 4px; letter-spacing: .04em; }
.pLegend i { display: inline-block; width: 14px; height: 2px; vertical-align: middle; margin-right: 6px; }
.pLegend .lp { background: var(--white); }
.pLegend .lt { background: #ffb347; }
.pRead { margin: 6px 0 6px; display: grid; grid-template-columns: 1fr 1.25fr; gap: 0 12px; font-size: 0.8125rem; }
.pRead dt, .pRead dd { margin: 0; padding: 4px 0; border-top: 1px solid var(--line); }
.pRead dt { color: var(--fg-2); }
.pRead dd { color: var(--fg); font-variant-numeric: tabular-nums; }
#physics .fine { margin-top: 6px; }
.panel-open #stamp { display: none; }

@media (max-width: 900px) {
  #guide { left: 0; right: 0; top: 0; bottom: 0; width: auto; border-radius: 0; }
  #guide.hidden { transform: translateY(24px); }
  #physics { left: 0; right: 0; top: auto; bottom: 0; width: auto; max-height: 70%; border-radius: var(--radius) var(--radius) 0 0; padding-bottom: 84px; }
  #physics.hidden { transform: translateY(24px); }
}

/* test harness: software renderers choke on backdrop blur */
.nofx .lbl, .nofx #card, .nofx #tools, .nofx .menu, .nofx #tourBar, .nofx #help, .nofx #tip, .nofx #results, .nofx #guide, .nofx #physics { backdrop-filter: none !important; -webkit-backdrop-filter: none !important; }
.nofx * { animation: none !important; transition: none !important; }

/* ---------- Walk mode ---------- */
#walkHud { position: absolute; inset: 0; z-index: 12; pointer-events: none; }
#walkHud.hidden { display: none; }
#wReticle { position: absolute; left: 50%; top: 50%; width: 6px; height: 6px; margin: -3px 0 0 -3px; border-radius: 50%; background: var(--fg); opacity: .55; box-shadow: 0 0 0 1px rgba(13,10,5,.5); transition: transform .15s, opacity .15s; }
#wReticle.hot { transform: scale(1.6); opacity: .95; }
#wTargetWrap { position: absolute; left: calc(50% + 16px); top: 50%; transform: translateY(-50%); text-align: left; }
#wTarget { font-size: 0.86rem; color: var(--fg); letter-spacing: .01em; text-shadow: 0 1px 2px rgba(13,10,5,.8); }
#wPrompt { margin-top: 2px; font-size: var(--fs-label); letter-spacing: var(--track-label); text-transform: uppercase; color: var(--fg-2); text-shadow: 0 1px 2px rgba(13,10,5,.8); }
#wKeys { position: absolute; left: 22px; bottom: calc(var(--barH, 60px) + 22px); display: flex; gap: 14px; font-size: var(--fs-label); letter-spacing: var(--track-label); text-transform: uppercase; color: var(--fg-2); }
#wKeys b { color: var(--fg); font-weight: 500; margin-right: 4px; }
#wTop { position: absolute; right: 22px; top: 18px; display: flex; align-items: center; gap: 10px; pointer-events: auto; }
#wTop .tbtn { background: rgba(13,10,5,.55); border: 1px solid var(--hair); }
#wView { font-size: var(--fs-label); letter-spacing: var(--track-label); text-transform: uppercase; color: var(--fg-2); }
#wJoy { position: absolute; width: 110px; height: 110px; margin: -55px 0 0 -55px; border-radius: 50%; border: 1px solid rgba(255,252,244,.35); background: rgba(13,10,5,.25); display: none; }
#wJoy.show { display: block; }
#wKnob { position: absolute; left: 50%; top: 50%; width: 44px; height: 44px; margin: -22px 0 0 -22px; border-radius: 50%; background: rgba(255,252,244,.8); }
#wTouch { position: absolute; right: 22px; bottom: calc(var(--barH, 60px) + 22px); display: none; gap: 12px; pointer-events: auto; }
.wbtn { width: 74px; height: 74px; border-radius: 50%; border: 1px solid rgba(255,252,244,.5); background: rgba(13,10,5,.45); color: var(--fg); font: inherit; font-size: var(--fs-label); letter-spacing: var(--track-label); text-transform: uppercase; }
body.walking #labels, body.walking #hint, body.walking #tip { display: none !important; }
/* minimap, compass, speech, toast */
#minimap { position: absolute; left: 22px; top: 18px; width: 180px; height: 180px; border-radius: 50%; border: 1px solid var(--line-strong); background: var(--glass); box-shadow: 0 10px 30px rgba(13,10,5,.35); }
#compass { position: absolute; left: 50%; top: 56px; width: 260px; height: 26px; margin-left: -130px; background: var(--glass); border: 1px solid var(--line); border-radius: 999px; padding: 0 10px; box-sizing: content-box; }
#speech { position: absolute; transform: translate(-50%, -100%); max-width: 280px; padding: 9px 13px; border-radius: 12px; background: var(--glass-2); border: 1px solid var(--line-strong); color: var(--fg); font-size: 0.9rem; line-height: 1.4; pointer-events: none; }
#speech::after { content: ""; position: absolute; left: 50%; bottom: -6px; width: 10px; height: 10px; margin-left: -5px; background: var(--glass-2); border-right: 1px solid var(--line-strong); border-bottom: 1px solid var(--line-strong); transform: rotate(45deg); }
#speech.hidden { display: none; }
#toast { position: absolute; left: 50%; bottom: calc(var(--barH, 60px) + 24px); transform: translate(-50%, 10px); padding: 10px 16px; border-radius: 999px; background: var(--glass-2); border: 1px solid var(--line-strong); color: var(--fg); font-size: var(--fs-small); z-index: 14; opacity: 0; transition: opacity .3s, transform .3s var(--ease); pointer-events: none; display: flex; align-items: center; gap: 10px; white-space: nowrap; }
#toast.show { opacity: 1; transform: translate(-50%, 0); }
#toast.hidden { display: none; }
#toast b { color: var(--fg); font-weight: 500; }
#toast .tick { width: 8px; height: 8px; border-radius: 50%; background: #4fe0a8; }
#travelFade { position: absolute; inset: 0; background: #0d0a05; opacity: 0; pointer-events: none; transition: opacity .25s; z-index: 50; }
#travelFade.on { opacity: 1; }
body.photo #tools, body.photo #walkHud, body.photo #labels, body.photo #stamp, body.photo .ruler-v, body.photo .ruler-h, body.photo #card, body.photo #tip, body.photo #hint { visibility: hidden !important; }
@media (max-width: 720px) { #minimap { width: 120px; height: 120px; left: 12px; top: 56px; } #compass { width: 200px; margin-left: -100px; top: 12px; } }
@media (pointer: coarse) { #compass { top: 58px; } }

/* door keypad */
#keypad { position: absolute; inset: 0; z-index: 42; display: grid; place-items: center; background: rgba(13,10,5,.55); }
#keypad.hidden { display: none; }
.kpBox { position: relative; width: 300px; padding: 22px 22px 18px; border: 1px solid var(--line-strong); border-radius: var(--radius); background: var(--glass-2); color: var(--fg); }
.kpBox .xbtn { position: absolute; top: 10px; right: 10px; }
.kpDisplay { margin: 16px 0 14px; padding: 12px 14px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: #000; color: #4fe0a8; font: 500 1.6rem/1 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .3em; text-align: center; }
.kpGrid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.kpKey { padding: 14px 0; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface); color: var(--fg); font: 500 1.1rem var(--font); cursor: pointer; }
.kpKey:hover { background: var(--surface-2); border-color: var(--line-strong); }
.kpKey.kpOk { background: var(--fg); color: var(--bg); border-color: var(--fg); }
.kpKey.kpAlt { color: var(--fg-2); }
.kpMsg { margin: 14px 0 0; font-size: var(--fs-small); color: var(--fg-2); line-height: 1.45; min-height: 2.6em; }
.kpBox.shake { animation: kpShake .35s; }
@keyframes kpShake { 0%, 100% { transform: translateX(0); } 25% { transform: translateX(-7px); } 75% { transform: translateX(7px); } }
body.driving #wReticle { display: none; }
body.driving #wTargetWrap { left: 50%; top: auto; bottom: calc(var(--barH, 60px) + 72px); transform: translateX(-50%); text-align: center; max-width: min(560px, 86vw); }
body.driving #wTarget { font-size: 0.95rem; font-variant-numeric: tabular-nums; }

/* site map overlay */
#mapOverlay { position: absolute; inset: 0; z-index: 40; display: grid; grid-template-columns: 1fr 320px; gap: 18px; padding: 22px; background: rgba(13,10,5,.78); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); color: var(--fg); }
#mapOverlay.hidden { display: none; }
.mapPanel { position: relative; display: flex; flex-direction: column; min-width: 0; border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg); overflow: hidden; }
.mapHead { display: flex; align-items: center; justify-content: space-between; padding: 14px 18px; border-bottom: 1px solid var(--line); }
#mapCanvas { flex: 1; width: 100%; height: 100%; min-height: 0; cursor: crosshair; display: block; touch-action: none; }
.mapHint { margin: 0; padding: 10px 18px; font-size: var(--fs-label); letter-spacing: var(--track-label); text-transform: uppercase; color: var(--fg-2); border-top: 1px solid var(--line); }
.mapSide { display: flex; flex-direction: column; gap: 18px; overflow: auto; min-height: 0; }
.mapSec { border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg); padding: 14px 16px; }
.mapPlaces { display: grid; gap: 4px; margin-top: 10px; }
.mapPlaces .mi { display: flex; flex-direction: column; align-items: flex-start; gap: 2px; width: 100%; text-align: left; padding: 9px 10px; border-radius: var(--radius-sm); background: none; border: 1px solid transparent; color: var(--fg); font: inherit; cursor: pointer; }
.mapPlaces .mi:hover { background: var(--surface); border-color: var(--line); }
.mapPlaces .mi b { font-weight: 500; font-size: var(--fs-small); }
.mapPlaces .mi span { font-size: var(--fs-label); letter-spacing: var(--track-label); text-transform: uppercase; color: var(--fg-2); }
.checkList { list-style: none; padding: 0; margin: 10px 0 0; display: grid; gap: 8px; font-size: var(--fs-small); color: var(--fg-2); }
.checkList li { display: flex; align-items: center; gap: 10px; }
.checkList .tick { width: 12px; height: 12px; border-radius: 50%; border: 1px solid var(--line-strong); flex: 0 0 auto; }
.checkList li.done { color: var(--fg); }
.checkList li.done .tick { background: #4fe0a8; border-color: #4fe0a8; }
body.mapOpen #walkHud { visibility: hidden; }
@media (max-width: 900px) { #mapOverlay { grid-template-columns: 1fr; grid-template-rows: 1fr auto; padding: 12px; gap: 12px; } .mapSide { flex-direction: row; } .mapSec { flex: 1; min-width: 0; } .checkList { max-height: 120px; overflow: auto; } }
body.walking .tgroup.slider, body.walking #tgTour, body.walking #btnStartup, body.walking #viewsBtn, body.walking #btnReset, body.walking #tgLabels, body.walking #tgFlow { opacity: .3; pointer-events: none; }
body.walking #stamp { display: none; }
@media (pointer: coarse) { #wKeys { display: none; } #wTouch { display: flex; } }
@media (max-width: 720px) { #wTop { top: 10px; right: 10px; } }

/* ---------- Title page ---------- */
#intro { position: absolute; inset: 0; z-index: 60; display: flex; align-items: center; justify-content: center; color: var(--fg); transition: opacity .9s var(--ease); }
#intro.out { opacity: 0; pointer-events: none; }
#intro .introBg { position: absolute; inset: 0; background: #0d0a05 url(poster.jpg) center / cover no-repeat; transition: opacity 1.8s var(--ease); }
#intro::before { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(13,10,5,.55) 0%, rgba(13,10,5,.72) 60%, rgba(13,10,5,.9) 100%); transition: opacity 1.8s var(--ease); }
#intro::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(13,10,5,.3) 0%, rgba(13,10,5,.52) 55%, rgba(13,10,5,.82) 100%); opacity: 0; transition: opacity 1.8s var(--ease); }
/* once the scene is ready, the poster gives way to the live flyover behind the title */
#intro.live .introBg, #intro.live::before { opacity: 0; }
#intro.live::after { opacity: 1; }
.introBox { position: relative; z-index: 1; max-width: 640px; width: calc(100% - 48px); padding: 36px 0; }
.introBox h1 { font-size: clamp(2.2rem, 5.4vw, 4rem); font-weight: 500; letter-spacing: -0.02em; line-height: 1.02; margin: 18px 0 20px; }
.introLead { font-size: clamp(1rem, 1.4vw, 1.15rem); line-height: 1.55; color: var(--fg); max-width: 560px; margin: 0 0 30px; opacity: .92; }
.introRow { display: flex; align-items: center; gap: 26px; flex-wrap: wrap; }
.enter { display: inline-flex; align-items: center; gap: 12px; padding: 12px 22px 12px 18px; border: 1px solid var(--line-strong); border-radius: 999px; color: var(--fg); font: inherit; font-size: 0.78rem; letter-spacing: .14em; text-transform: uppercase; background: rgba(13,10,5,.35); transition: background .25s, border-color .25s, color .25s; }
.enter:not([disabled]):hover { background: var(--fg); color: var(--bg); border-color: var(--fg); }
.enter[disabled] { color: var(--fg-2); cursor: default; }
.enter .dot--dashed { animation: dot-spin 6s linear infinite; }
.enter.ready .dot { border: 0; background: currentColor; animation: none; }
.introStatus { display: flex; flex-direction: column; gap: 8px; min-width: 200px; }
.introBar { width: 200px; height: 1px; background: rgba(255,252,244,.18); position: relative; overflow: hidden; }
.introBar i { position: absolute; left: 0; top: 0; bottom: 0; width: 0; background: var(--fg); transition: width .4s var(--ease); }
#introStep { font-size: var(--fs-label); letter-spacing: var(--track-label); text-transform: uppercase; color: var(--fg-2); }
.introNote { display: flex; align-items: center; gap: 22px; flex-wrap: wrap; margin: 34px 0 0; font-size: var(--fs-label); letter-spacing: var(--track-label); text-transform: uppercase; color: var(--fg-2); }
.introNote b { color: var(--fg); font-weight: 500; }
#introFail { margin-top: 26px; padding-top: 18px; border-top: 1px solid var(--hair); }
#introFail p { margin: 0 0 12px; color: var(--fg); }
#introFail.hidden { display: none; }
body.intro-open #tools, body.intro-open #stamp, body.intro-open #hint, body.intro-open .rulers, body.intro-open .ruler-v, body.intro-open .ruler-h, body.intro-open #labels, body.intro-open #leaders { visibility: hidden; }
.linkBtn { background: none; border: 0; padding: 0; color: var(--fg); font: inherit; font-size: var(--fs-label); letter-spacing: var(--track-label); text-transform: uppercase; cursor: pointer; border-bottom: 1px solid var(--line-strong); }
.linkBtn:hover { border-color: var(--fg); }

/* ---------- 60-second intro tour ---------- */
#cine { position: absolute; inset: 0; z-index: 55; color: var(--fg); }
#cine.hidden { display: none; }
.cineBar { position: absolute; left: 0; right: 0; height: 9vh; background: #0d0a05; pointer-events: auto; }
.cineBar--top { top: 0; } .cineBar--bottom { bottom: 0; }
#cineFade { position: absolute; inset: 0; background: #0d0a05; opacity: 1; pointer-events: none; }
#cine.ending { pointer-events: none; }
#cine.ending #cineFade { transition: opacity .8s var(--ease); }
#cine.ending .cineBar, #cine.ending .cineTop, #cine.ending .cineProg, #cine.ending::before, #cine.ending::after { opacity: 0; transition: opacity .6s var(--ease); }
.cineTop { position: absolute; top: calc(9vh + 18px); left: 28px; right: 28px; display: flex; align-items: center; justify-content: space-between; pointer-events: none; }
.cineBrand { display: inline-flex; align-items: center; gap: 10px; font-size: var(--fs-label); letter-spacing: var(--track-label); text-transform: uppercase; color: var(--fg-2); }
.cineBrand .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--fg); }
#cineSkip { pointer-events: auto; background: rgba(13,10,5,.5); border: 1px solid var(--line-strong); }
#cineCap { position: absolute; left: 28px; bottom: calc(9vh + 34px); max-width: min(640px, calc(100% - 56px)); opacity: 0; transform: translateY(10px); transition: opacity .6s var(--ease), transform .6s var(--ease); pointer-events: none; }
#cineCap.show { opacity: 1; transform: none; }
.cineStep { font-size: var(--fs-label); letter-spacing: var(--track-label); text-transform: uppercase; color: var(--fg-2); margin: 0 0 12px; padding-bottom: 10px; border-bottom: 1px solid var(--line-strong); display: inline-block; min-width: 180px; }
.cineTitle { font-size: clamp(1.7rem, 4.2vw, 3rem); font-weight: 500; letter-spacing: -0.02em; line-height: 1.05; margin: 0 0 12px; text-shadow: 0 2px 18px rgba(13,10,5,.6); }
.cineText { font-size: clamp(0.95rem, 1.35vw, 1.12rem); line-height: 1.5; margin: 0; color: var(--fg); opacity: .92; text-shadow: 0 1px 10px rgba(13,10,5,.7); }
.cineProg { position: absolute; left: 0; right: 0; bottom: 9vh; height: 2px; background: rgba(255,252,244,.14); }
.cineProg i { display: block; height: 100%; width: 0; background: var(--fg); transition: width .25s linear; }
#cine::before { content: ""; position: absolute; left: 0; right: 0; top: 9vh; height: 120px; background: linear-gradient(180deg, rgba(13,10,5,.55), rgba(13,10,5,0)); pointer-events: none; }
#cine::after { content: ""; position: absolute; left: 0; right: 0; bottom: 9vh; height: 220px; background: linear-gradient(0deg, rgba(13,10,5,.6), rgba(13,10,5,0)); pointer-events: none; }
body.cine #tools, body.cine #stamp, body.cine #hint, body.cine .ruler-v, body.cine .ruler-h, body.cine .rulers, body.cine #labels, body.cine #card, body.cine #tip, body.cine #tourBar, body.cine #physics, body.cine #guide, body.cine .menu { visibility: hidden !important; }
@media (max-width: 720px) { .cineBrand .long { display: none; } .cineBar { height: 7vh; } .cineTop { top: calc(7vh + 12px); left: 16px; right: 16px; } #cineCap { left: 16px; bottom: calc(7vh + 26px); } .cineProg { bottom: 7vh; } .cineStep { min-width: 0; } }
.qrow { display: flex; align-items: center; gap: 4px; padding: 4px 10px; font-size: var(--fs-small); color: var(--fg-2); flex-wrap: wrap; }
.qrow span { margin-right: 6px; }
.qrow .qbtn { padding: 5px 8px; }
@media (max-width: 720px) { .introBox { padding: 20px 0; } .introRow { gap: 16px; } .introNote { gap: 10px; flex-direction: column; } }
.qrow em { font-style: normal; color: var(--fg); margin-left: 4px; }