/* Dark imaging-console aesthetic, deliberately single-theme.
   Two modes: `minimal` shows only the model, `explore` brings in a symmetric
   pair of panels - controls left, detail right - so the layout stays balanced. */

/* Apple's own San Francisco cannot be redistributed, so the stack asks for it
   first via -apple-system and falls back to Inter everywhere else. Inter was
   drawn as an SF-alike, so Mac gets the real thing and Windows/Android get a
   face that sits in the same place typographically. One 47 KB variable file,
   latin subset, self-hosted so the page still works offline. */
@font-face{
  font-family:"Inter Variable";
  font-style:normal;
  font-weight:100 900;
  font-display:swap;
  src:url("../fonts/inter-latin-wght-normal.woff2") format("woff2");
}

:root{
  --panel-a:rgba(28,34,40,.80);
  --panel-b:rgba(13,16,19,.88);
  --line:rgba(255,255,255,.10);
  --line-2:rgba(255,255,255,.055);
  --ink:#e6eaee;
  --ink-2:#8b969f;
  --ink-3:#5d666e;
  --accent:#4cc9e0;
  --accent-dim:rgba(76,201,224,.16);
  --mono:ui-monospace,"SF Mono",SFMono-Regular,Menlo,Consolas,"Roboto Mono",monospace;
  --sans:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text",
         "Inter Variable",Inter,"Segoe UI",system-ui,sans-serif;
  --shadow:0 18px 46px rgba(0,0,0,.5),inset 0 1px 0 rgba(255,255,255,.07);
  --panel-w:264px;
  --bar-h:52px;
  --safe-b:env(safe-area-inset-bottom,0px);
}

*{box-sizing:border-box}
html,body{height:100%;overscroll-behavior:none}
body{
  margin:0;color:var(--ink);font-family:var(--sans);overflow:hidden;
  -webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent;
  background:
    radial-gradient(120% 80% at 50% 12%,rgba(78,132,160,.16),transparent 62%),
    radial-gradient(70% 55% at 18% 92%,rgba(196,116,96,.10),transparent 70%),
    radial-gradient(90% 70% at 82% 78%,rgba(76,201,224,.075),transparent 72%),
    #07090b;
}

/* ---------- stage ---------- */
#stage{position:fixed;inset:0}
#view{display:block;width:100%;height:100%;touch-action:none}

#stage::before{                      /* graticule */
  content:"";position:absolute;inset:0;pointer-events:none;z-index:1;
  background:
    linear-gradient(var(--line-2) 1px,transparent 1px) 0 0/100% 88px,
    linear-gradient(90deg,var(--line-2) 1px,transparent 1px) 0 0/88px 100%;
  mask-image:radial-gradient(ellipse at center,#000 20%,transparent 78%);
  opacity:.42;
}
#stage::after{                       /* vignette */
  content:"";position:absolute;inset:0;pointer-events:none;z-index:3;
  background:radial-gradient(ellipse 78% 72% at 50% 48%,transparent 52%,rgba(0,0,0,.55) 100%);
}

/* ---------- entrance ---------- */
@keyframes rise{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
/* Centred elements need their own keyframes: a plain `transform:none` at the
   end of `rise` would silently drop the translateX(-50%) that centres them. */
@keyframes riseX{
  from{opacity:0;transform:translate(-50%,14px)}
  to{opacity:1;transform:translate(-50%,0)}
}
@keyframes fadein{from{opacity:0}to{opacity:1}}

/* ---------- title, centred ---------- */
#titlebar{
  position:fixed;left:50%;top:20px;z-index:5;pointer-events:none;
  transform:translateX(-50%);text-align:center;
  animation:riseX .9s cubic-bezier(.22,1,.36,1) .15s both;
}
#titlebar h1{
  margin:0;font:250 23px/1 var(--sans);letter-spacing:.32em;
  font-optical-sizing:auto;
  background:linear-gradient(96deg,#ffffff 8%,#a9c6d6 52%,#4cc9e0 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  padding-left:.32em;              /* optical centring against the tracking */
}
#subtitle{
  margin:9px 0 0;font:400 9.5px/1 var(--mono);letter-spacing:.16em;
  text-transform:uppercase;color:var(--ink-3);transition:opacity .4s;
}
body[data-mode="explore"] #subtitle{opacity:0}

/* ---------- panels ---------- */
.panel{
  position:fixed;z-index:6;width:var(--panel-w);
  top:96px;bottom:calc(var(--bar-h) + 44px);
  background:linear-gradient(168deg,var(--panel-a),var(--panel-b));
  backdrop-filter:blur(20px) saturate(1.35);
  border:1px solid var(--line);border-radius:14px;
  box-shadow:var(--shadow);
  display:flex;flex-direction:column;
  transition:opacity .38s cubic-bezier(.22,1,.36,1),
             transform .38s cubic-bezier(.22,1,.36,1),
             visibility .38s;
}
.panel-scroll{
  flex:1;overflow-y:auto;padding:15px 15px 17px;
  scrollbar-width:none;-ms-overflow-style:none;
}
.panel-scroll::-webkit-scrollbar{width:0;height:0;display:none}
.sheet-grip{display:none}

#layers{left:20px}
#detail{right:20px}

/* minimal mode: slide the panels out to their own side and stop rendering */
body[data-mode="minimal"] .panel{opacity:0;visibility:hidden}
body[data-mode="minimal"] #layers{transform:translateX(-26px)}
body[data-mode="minimal"] #detail{transform:translateX(26px)}

.panel h2{
  margin:0 0 8px;font:600 9.5px/1 var(--mono);
  letter-spacing:.18em;text-transform:uppercase;color:var(--ink-3);
}
.panel h2:not(:first-child){margin-top:15px;padding-top:12px;border-top:1px solid var(--line-2)}

/* ---------- presets ---------- */
.presets{display:grid;grid-template-columns:1fr 1fr;gap:5px;margin-bottom:4px}
.presets button{
  appearance:none;background:rgba(255,255,255,.045);color:var(--ink-2);
  border:1px solid var(--line-2);border-radius:8px;padding:8px 6px;cursor:pointer;
  font:500 10.2px/1 var(--sans);transition:.15s;
}
.presets button:hover{
  background:rgba(255,255,255,.11);color:var(--ink);
  border-color:rgba(255,255,255,.2);transform:translateY(-1px);
}
.presets button.on{
  background:var(--accent-dim);border-color:rgba(76,201,224,.55);color:var(--accent);
}

/* ---------- layer chips ---------- */
.lgroup{margin-bottom:11px}
.lgroup > b{
  display:block;font:600 8.5px/1 var(--mono);letter-spacing:.16em;
  text-transform:uppercase;color:var(--ink-3);margin:0 0 6px 1px;opacity:.8;
}
.chips{display:flex;flex-wrap:wrap;gap:4px}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  appearance:none;cursor:pointer;
  padding:5px 9px 5px 7px;border-radius:999px;
  border:1px solid var(--line-2);background:transparent;
  font:500 10.8px/1 var(--sans);color:var(--ink-3);
  transition:background .15s,border-color .15s,color .15s,transform .15s;
}
.chip i{
  width:8px;height:8px;border-radius:50%;background:var(--c);
  opacity:.32;transition:opacity .15s,box-shadow .15s;flex:none;
}
.chip:hover{border-color:rgba(255,255,255,.26);color:var(--ink-2);transform:translateY(-1px)}
.chip.on{
  background:color-mix(in srgb,var(--c) 15%,transparent);
  border-color:color-mix(in srgb,var(--c) 55%,transparent);
  color:var(--ink);
}
.chip.on i{opacity:1;box-shadow:0 0 7px color-mix(in srgb,var(--c) 75%,transparent)}
.chip.on:hover{background:color-mix(in srgb,var(--c) 24%,transparent)}

/* still streaming: clickable, but the dot breathes so you know why nothing
   appeared yet. Clicking one jumps it to the front of the load queue. */
.chip.pending{opacity:.6}
.chip.pending i{animation:chippulse 1.25s ease-in-out infinite;box-shadow:none}
@keyframes chippulse{0%,100%{opacity:.22}50%{opacity:.7}}

#loadhint{
  display:none;margin:2px 0 0 2px;
  font:400 8.5px/1 var(--mono);letter-spacing:.14em;
  text-transform:uppercase;color:var(--ink-3);
}
#loadhint.on{display:block;animation:fadein .3s both}

/* ---------- generic controls ---------- */
.row{display:flex;gap:7px;align-items:center;margin:7px 0}
.btn{
  appearance:none;background:rgba(255,255,255,.06);color:var(--ink);
  border:1px solid var(--line);border-radius:8px;padding:0 13px;height:34px;
  cursor:pointer;font:500 10.5px/1 var(--mono);letter-spacing:.05em;transition:.15s;
  display:inline-flex;align-items:center;justify-content:center;
}
.btn:hover{background:rgba(255,255,255,.13);border-color:rgba(255,255,255,.22)}
.btn.ghost{background:transparent}
.btn.on{background:var(--accent);border-color:var(--accent);color:#04212a;font-weight:700}

.seg{display:flex;border:1px solid var(--line);border-radius:8px;overflow:hidden}
.seg button{
  appearance:none;background:transparent;border:0;border-right:1px solid var(--line-2);
  color:var(--ink-2);cursor:pointer;font:500 10.5px/1 var(--mono);transition:.15s;
  min-width:32px;height:34px;
}
.seg button:last-child{border-right:0}
.seg button:hover{background:rgba(255,255,255,.07);color:var(--ink)}
.seg button.on{background:var(--accent);color:#04212a;font-weight:700}
.panel .seg{flex:1}
.panel .seg button{flex:1;height:30px}

input[type=range]{
  flex:1;appearance:none;height:3px;border-radius:2px;background:var(--line);outline:0;
}
input[type=range]::-webkit-slider-thumb{
  appearance:none;width:13px;height:13px;border-radius:50%;background:var(--accent);
  cursor:pointer;border:2px solid #0b0d0f;transition:transform .15s;
}
input[type=range]:hover::-webkit-slider-thumb{transform:scale(1.18)}
input[type=range]:disabled{opacity:.32}
input[type=range]:disabled::-webkit-slider-thumb{background:var(--ink-3)}

.chk{display:flex;align-items:center;cursor:pointer}
.chk input{accent-color:var(--accent);margin:0}
.mini{font:400 9.5px/1 var(--mono);color:var(--ink-3);width:32px;letter-spacing:.05em}

.topic{
  display:flex;align-items:center;justify-content:space-between;width:100%;
  appearance:none;cursor:pointer;background:rgba(255,255,255,.04);
  border:1px solid var(--line-2);border-radius:8px;padding:9px 11px;
  font:500 11.4px/1 var(--sans);color:var(--ink-2);transition:.15s;
}
.topic:hover{background:var(--accent-dim);border-color:rgba(76,201,224,.45);color:var(--accent)}
.topic i{font-style:normal;opacity:.5}

/* ---------- detail panel ---------- */
.detail-empty{
  height:100%;display:flex;flex-direction:column;align-items:center;
  justify-content:center;text-align:center;gap:16px;padding:20px 6px;
}
.detail-empty p{margin:0;font:400 11.4px/1.65 var(--sans);color:var(--ink-3);max-width:190px}
.detail-empty .pulse{
  width:34px;height:34px;border-radius:50%;border:1px solid rgba(76,201,224,.4);
  position:relative;
}
.detail-empty .pulse::after{
  content:"";position:absolute;inset:-1px;border-radius:50%;
  border:1px solid rgba(76,201,224,.5);animation:ping 2.4s cubic-bezier(0,0,.2,1) infinite;
}
@keyframes ping{0%{transform:scale(1);opacity:.8}80%,100%{transform:scale(2);opacity:0}}

.d-head{animation:fadein .35s both}
.d-tag{
  display:inline-block;font:600 8.5px/1 var(--mono);letter-spacing:.14em;
  text-transform:uppercase;padding:5px 8px;border-radius:999px;margin-bottom:9px;
  background:color-mix(in srgb,var(--c) 18%,transparent);
  border:1px solid color-mix(in srgb,var(--c) 45%,transparent);
  color:color-mix(in srgb,var(--c) 78%,white);
}
.d-name{margin:0 0 12px;font:600 17px/1.18 var(--sans);color:var(--ink)}
.d-stats{
  display:grid;grid-template-columns:1fr 1fr;gap:1px;margin-bottom:13px;
  background:var(--line-2);border:1px solid var(--line-2);border-radius:9px;overflow:hidden;
}
.d-stats div{background:rgba(10,13,15,.5);padding:8px 9px}
.d-stats dt{font:400 8.5px/1 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3)}
.d-stats dd{margin:6px 0 0;font:600 13px/1 var(--sans);color:var(--ink)}
.d-stats dd small{font:400 9.5px/1 var(--mono);color:var(--ink-3);margin-left:3px}
.d-lines p{margin:0 0 9px;font:400 11.6px/1.66 var(--sans);color:var(--ink-2)}
.d-fact{
  margin-top:12px;padding:10px 11px;border-radius:9px;
  background:rgba(76,201,224,.08);border:1px solid rgba(76,201,224,.22);
}
.d-fact b{
  display:block;font:600 8.5px/1 var(--mono);letter-spacing:.14em;
  text-transform:uppercase;color:var(--accent);margin-bottom:6px;
}
.d-fact span{font:400 11.2px/1.6 var(--sans);color:#bcd6de}
.d-myth{
  margin-top:10px;padding:10px 11px;border-radius:9px;
  background:rgba(232,176,75,.09);border:1px solid rgba(232,176,75,.26);
}
.d-myth b{
  display:block;font:600 8.5px/1 var(--mono);letter-spacing:.14em;
  text-transform:uppercase;color:#e8b04b;margin-bottom:6px;
}
.d-myth span{font:400 11.2px/1.6 var(--sans);color:#e6c88a}

/* ---------- 3D callout ---------- */
#calloutlayer{position:absolute;inset:0;pointer-events:none;z-index:4;overflow:hidden}
.callout{
  position:absolute;width:252px;transform:translateY(-50%);
  background:linear-gradient(168deg,rgba(30,37,43,.94),rgba(12,15,18,.96));
  border:1px solid rgba(76,201,224,.42);border-radius:12px;padding:12px 13px;
  box-shadow:0 16px 40px rgba(0,0,0,.6);
  animation:pop .34s cubic-bezier(.22,1,.36,1) both;
}
@keyframes pop{from{opacity:0;transform:translateY(-50%) scale(.92)}to{opacity:1;transform:translateY(-50%) scale(1)}}
.callout h3{
  margin:0 0 7px;font:600 12.5px/1.25 var(--sans);color:var(--accent);
  display:flex;justify-content:space-between;gap:10px;align-items:baseline;
}
.callout h3 em{font:400 9.5px/1.4 var(--mono);color:var(--ink-3);font-style:normal;flex:none}
.callout p{margin:0 0 6px;font:400 10.9px/1.55 var(--sans);color:#c3ccd3}
.callout p:last-child{margin-bottom:0}
.callout .more{
  font:400 9.5px/1.5 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);
}
.callout p + .more,.callout .d-fact + .more{
  margin-top:9px;padding-top:8px;border-top:1px solid var(--line-2);
}
/* compact form used in explore mode, where the panel holds the detail */
body[data-mode="explore"] .callout{width:auto;max-width:230px}

#hovertip{
  position:absolute;z-index:7;pointer-events:none;transform:translate(12px,-50%);
  background:rgba(11,13,15,.93);border:1px solid var(--line);border-radius:6px;
  padding:5px 9px;font:500 10.5px/1 var(--mono);color:var(--ink);
}

/* ---------- bottom bar, centred ---------- */
#tools{
  position:fixed;left:50%;bottom:calc(20px + var(--safe-b));z-index:7;
  transform:translateX(-50%);
  display:flex;gap:8px;align-items:center;
  background:linear-gradient(168deg,var(--panel-a),var(--panel-b));
  backdrop-filter:blur(20px) saturate(1.35);
  border:1px solid var(--line);border-radius:14px;padding:9px 10px;
  box-shadow:var(--shadow);
  animation:riseX .9s cubic-bezier(.22,1,.36,1) .4s both;
}
.mobile-only{display:none}
.btn .ico{display:none}

/* small link out to the write-up, top right */
#docsBtn{
  position:fixed;right:20px;top:22px;z-index:8;
  display:inline-flex;align-items:center;
  padding:8px 14px;height:34px;
  border:1px solid var(--line);border-radius:9px;
  background:linear-gradient(168deg,var(--panel-a),var(--panel-b));
  backdrop-filter:blur(18px) saturate(1.3);
  color:var(--ink-2);text-decoration:none;
  font:500 11px/1 var(--mono);letter-spacing:.1em;text-transform:uppercase;
  transition:.16s;
  animation:fadein .9s .55s both;
}
#docsBtn:hover{
  color:var(--accent);border-color:rgba(76,201,224,.5);
  background:rgba(76,201,224,.12);transform:translateY(-1px);
}

#orient{
  position:fixed;right:26px;bottom:calc(26px + var(--safe-b));z-index:5;
  width:88px;height:88px;pointer-events:none;
  animation:fadein 1s .6s both;
}
#orient span{position:absolute;font:600 9.5px/1 var(--mono);letter-spacing:.1em;transition:color .2s}

/* ---------- loader ---------- */
#loader{
  position:fixed;left:50%;top:50%;transform:translate(-50%,-50%);z-index:9;
  display:flex;flex-direction:column;align-items:center;gap:14px;transition:opacity .7s ease;
}
#loader.done{opacity:0;pointer-events:none}
#loader .ring{width:46px;height:46px;position:relative}
#loader .ring i{
  position:absolute;inset:0;border-radius:50%;
  border:1.5px solid rgba(255,255,255,.09);border-top-color:var(--accent);
  animation:spin 1.05s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}
#loader .bar{width:150px;height:2px;background:var(--line);overflow:hidden;border-radius:2px}
#loader .bar i{display:block;height:100%;width:0;background:var(--accent);transition:width .35s ease}
#loader span{font:400 9.5px/1 var(--mono);letter-spacing:.2em;color:var(--ink-3);text-transform:uppercase}

/* =========================================================================
   MOBILE  -  panels become bottom sheets that sit above the bar
   ========================================================================= */
@media (max-width:860px), (pointer:coarse) and (max-width:1100px){
  :root{--bar-h:46px}

  #docsBtn{right:10px;top:10px;height:30px;padding:0 11px;font-size:9.5px}
  #titlebar{top:14px;width:100%}
  #titlebar h1{font-size:16px;letter-spacing:.28em;padding-left:.28em}
  #subtitle{font-size:8px;margin-top:7px;letter-spacing:.12em;white-space:nowrap}
  #orient{display:none}

  .panel{
    left:10px;right:10px;width:auto;top:auto;
    bottom:calc(var(--bar-h) + 26px + var(--safe-b));
    max-height:min(58vh,440px);
    border-radius:16px;
    opacity:1;visibility:visible;
  }
  /* These have to be ID selectors. The desktop rule that parks the panels off
     to the side is `body[data-mode="minimal"] #layers`, which carries an ID
     and therefore outranks any `.panel` rule in here - so the sheets were
     never actually translated off-screen, they were only made invisible, and
     the slide-up never played. */
  #layers,#detail{transform:translateY(calc(100% + 90px))}
  .panel-scroll{padding:4px 14px 16px}
  /* Full-width strip rather than just the pill: it is the drag handle, so it
     needs a thumb-sized target. touch-action:none stops the browser trying to
     scroll the page out from under the gesture. */
  .sheet-grip{
    display:flex;align-items:center;justify-content:center;
    width:100%;height:26px;flex:none;cursor:grab;
    touch-action:none;
  }
  .sheet-grip::before{
    content:"";width:38px;height:4px;border-radius:99px;
    background:rgba(255,255,255,.24);transition:background .15s;
  }
  .sheet-grip:active{cursor:grabbing}
  .sheet-grip:active::before{background:rgba(255,255,255,.42)}

  /* only one sheet at a time, and only in explore mode */
  body[data-mode="minimal"] #layers,
  body[data-mode="minimal"] #detail{transform:translateY(calc(100% + 90px))}
  body[data-mode="explore"][data-sheet="layers"] #layers{transform:translateY(0)}
  body[data-mode="explore"][data-sheet="detail"] #detail{transform:translateY(0)}

  /* bigger touch targets */
  .presets{grid-template-columns:1fr 1fr 1fr;gap:6px}
  .presets button{padding:11px 6px;font-size:11px}
  .chip{padding:9px 13px 9px 10px;font-size:12px;gap:8px}
  .chip i{width:9px;height:9px}
  .topic{padding:12px 12px;font-size:12.5px}
  input[type=range]{height:5px}
  input[type=range]::-webkit-slider-thumb{width:20px;height:20px}
  .panel .seg button{height:38px;font-size:11px}
  .row{margin:10px 0}

  /* The bar has to survive a 390 px screen: six view buttons plus three
     controls overflowed and became unreachable, so the segment tightens and
     Reset collapses to its glyph. */
  #tools{
    bottom:calc(12px + var(--safe-b));gap:5px;padding:6px 7px;border-radius:13px;
    max-width:calc(100vw - 16px);
  }
  #tools .seg button{min-width:25px;height:38px;font-size:10px}
  #tools .btn{height:38px;padding:0 10px;font-size:10px}
  #resetBtn{padding:0 11px;font-size:15px}
  .btn .lbl{display:none}
  .btn .ico{display:inline}
  .mobile-only{display:inline-flex}

  /* the leader-line card would be unreadable at this size; dock it instead */
  .callout{
    position:fixed;left:10px;right:10px;width:auto;bottom:calc(var(--bar-h) + 26px + var(--safe-b));
    top:auto;transform:none;animation:sheetup .34s cubic-bezier(.22,1,.36,1) both;
    max-height:38vh;overflow-y:auto;scrollbar-width:none;
  }
  .callout .d-stats{grid-template-columns:1fr 1fr;margin:11px 0 0}
  .callout .d-fact{margin-top:10px}
  .callout::-webkit-scrollbar{display:none}
  @keyframes sheetup{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:none}}
  body[data-sheet="layers"] .callout,
  body[data-sheet="detail"] .callout{display:none}

  #hovertip{display:none}
  .d-stats{grid-template-columns:1fr 1fr}
}

/* very short windows: let the panels use more height */
@media (max-height:620px) and (min-width:861px){
  .panel{top:74px;bottom:calc(var(--bar-h) + 30px)}
  #titlebar #subtitle{display:none}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;transition-duration:.01ms !important}
}