:root{
  --ink: #0a0e13;
  --ink-2: #0f151c;
  --panel: #131a22;
  --panel-2: #171f28;
  --line: rgba(233,228,216,0.09);
  --line-strong: rgba(233,228,216,0.16);
  --bone: #e9e4d8;
  --bone-dim: #b9b3a4;
  --muted: #798591;
  --teal: #55d6c2;
  --teal-dim: rgba(85,214,194,0.16);
  --amber: #e8a15c;
  --amber-dim: rgba(232,161,92,0.16);
  --rose: #d8776e;
  --radius: 14px;
  --serif: "Fraunces", "Iowan Old Style", serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  background: var(--ink);
  color: var(--bone);
  font-family: var(--sans);
  overflow:hidden;
  -webkit-font-smoothing:antialiased;
}

.mono{ font-family: var(--mono); letter-spacing:0.02em; }
.muted{ color: var(--muted); }
.small{ font-size:11px; }

.eyebrow{
  font-family: var(--mono);
  font-size:10.5px;
  letter-spacing:0.16em;
  color: var(--teal);
  text-transform:uppercase;
}

/* ============ LAYOUT ============ */
.app{
  display:grid;
  grid-template-columns: 300px 1fr 340px;
  height:100vh;
  width:100vw;
  background:
    radial-gradient(1200px 800px at 20% 0%, rgba(85,214,194,0.05), transparent 60%),
    radial-gradient(1000px 700px at 100% 100%, rgba(232,161,92,0.04), transparent 60%),
    var(--ink);
}

.rail{
  background: linear-gradient(180deg, var(--panel), var(--ink-2));
  border-right: 1px solid var(--line);
  padding: 22px 18px;
  overflow-y:auto;
  display:flex;
  flex-direction:column;
  gap:18px;
}
.rail-right{ border-right:none; border-left:1px solid var(--line); position:relative; transition: transform .35s ease, opacity .35s ease; }
.rail-right.hidden{ transform: translateX(24px); opacity:0; pointer-events:none; }

.rail::-webkit-scrollbar{ width:6px; }
.rail::-webkit-scrollbar-thumb{ background: var(--line-strong); border-radius:4px; }

/* -------- left rail -------- */
.rail-header{ display:flex; flex-direction:column; gap:6px; margin-bottom:4px; }
.brand{
  font-family: var(--serif);
  font-weight:500;
  font-size:30px;
  margin:0;
  color: var(--bone);
}
.brand-dot{ color: var(--teal); }

.specimen-list{ display:flex; flex-direction:column; gap:6px; }
.specimen-item{
  display:flex;
  align-items:center;
  gap:12px;
  padding:10px 10px;
  border-radius:10px;
  cursor:pointer;
  border:1px solid transparent;
  transition: background .18s ease, border-color .18s ease;
}
.specimen-item:hover{ background: var(--panel-2); }
.specimen-item.active{
  background: var(--teal-dim);
  border-color: rgba(85,214,194,0.35);
}
.specimen-num{
  font-family: var(--mono);
  font-size:11px;
  color: var(--muted);
  width:20px;
  flex-shrink:0;
}
.specimen-item.active .specimen-num{ color: var(--teal); }
.specimen-icon{
  width:38px; height:38px; border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  font-size:18px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  flex-shrink:0;
}
.specimen-meta{ display:flex; flex-direction:column; line-height:1.25; min-width:0; }
.specimen-title{ font-size:14px; color: var(--bone); font-weight:500; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.specimen-system{ font-size:11px; color: var(--muted); }

.rail-footer{ margin-top:auto; padding-top:14px; border-top:1px solid var(--line); }

/* ============ VIEWPORT ============ */
.viewport{
  position:relative;
  overflow:hidden;
  background:
    radial-gradient(900px 600px at 50% 40%, rgba(85,214,194,0.06), transparent 65%),
    var(--ink);
}
#scene{ position:absolute; inset:0; display:block; width:100%; height:100%; touch-action:none; }

.viewport-grid{
  position:absolute; inset:0; pointer-events:none;
  background-image:
    linear-gradient(rgba(233,228,216,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(233,228,216,0.035) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(circle at 50% 45%, black 0%, transparent 72%);
}

.viewport-topbar{
  position:absolute; top:20px; left:20px; right:20px;
  display:flex; align-items:flex-start; justify-content:space-between;
  pointer-events:none;
}
.specimen-tag{
  display:flex; align-items:center; gap:12px;
  background: rgba(19,26,34,0.72);
  border:1px solid var(--line-strong);
  backdrop-filter: blur(10px);
  padding:10px 16px;
  border-radius:12px;
  pointer-events:auto;
}
.tag-num{
  font-family:var(--serif); font-size:20px; color: var(--teal);
  border-right:1px solid var(--line-strong); padding-right:12px;
}
.tag-name{ font-family: var(--serif); font-size:16px; }
.tag-sub{ font-family:var(--mono); font-size:10px; color:var(--muted); letter-spacing:.08em; text-transform:uppercase; }

.btn-ghost{
  pointer-events:auto;
  display:flex; align-items:center; gap:8px;
  background: rgba(19,26,34,0.72);
  border:1px solid var(--line-strong);
  backdrop-filter: blur(10px);
  color: var(--bone-dim);
  font-family: var(--mono); font-size:11px; letter-spacing:.05em;
  padding:10px 14px; border-radius:12px; cursor:pointer;
  transition: color .15s ease, border-color .15s ease;
}
.btn-ghost:hover{ color: var(--teal); border-color: rgba(85,214,194,0.4); }
.btn-ghost.small{ padding:6px 10px; font-size:10px; margin-top:10px; }

.tip-card{
  position:absolute; top:88px; right:20px; width:220px;
  background: rgba(19,26,34,0.86);
  border:1px solid var(--line-strong);
  backdrop-filter: blur(10px);
  border-radius:12px;
  padding:14px 16px 12px;
  transition: opacity .25s ease, transform .25s ease;
}
.tip-card.hidden{ opacity:0; transform: translateY(-8px); pointer-events:none; }
.tip-title{ font-family:var(--mono); font-size:11px; color:var(--amber); letter-spacing:.06em; margin-bottom:8px; }
.tip-row{ display:flex; justify-content:space-between; font-size:12px; color:var(--bone-dim); padding:3px 0; }
.tip-row span:first-child{ color:var(--bone); font-weight:500; }
.tip-close{
  position:absolute; top:8px; right:10px;
  background:none; border:none; color:var(--muted); font-size:16px; cursor:pointer;
  line-height:1;
}
.tip-close:hover{ color: var(--bone); }

.toolbar{
  position:absolute; left:20px; top:50%; transform:translateY(-50%);
  display:flex; flex-direction:column; gap:8px;
  background: rgba(19,26,34,0.72);
  border:1px solid var(--line-strong);
  backdrop-filter: blur(10px);
  border-radius:14px;
  padding:8px;
}
.tool-btn{
  display:flex; flex-direction:column; align-items:center; gap:4px;
  width:64px; padding:10px 4px;
  background:transparent; border:1px solid transparent; border-radius:10px;
  color: var(--bone-dim); cursor:pointer;
  transition: background .15s ease, color .15s ease, border-color .15s ease;
}
.tool-btn svg{ width:18px; height:18px; }
.tool-btn span{ font-family:var(--mono); font-size:9.5px; letter-spacing:.04em; text-transform:uppercase; }
.tool-btn:hover{ background: var(--panel-2); color: var(--bone); }
.tool-btn.active{ background: var(--teal-dim); color: var(--teal); border-color: rgba(85,214,194,0.35); }

.viewport-footer{
  position:absolute; bottom:18px; left:20px; right:20px;
  display:flex; align-items:center; justify-content:space-between;
}
.switch-row{ display:flex; align-items:center; gap:8px; cursor:pointer; }
.switch{
  width:34px; height:18px; border-radius:20px;
  background: var(--panel-2); border:1px solid var(--line-strong);
  position:relative; transition: background .2s ease;
}
.switch-knob{
  position:absolute; top:1px; left:1px; width:14px; height:14px; border-radius:50%;
  background: var(--muted); transition: transform .2s ease, background .2s ease;
}
.switch.on{ background: var(--teal-dim); border-color: rgba(85,214,194,0.4); }
.switch.on .switch-knob{ transform: translateX(16px); background: var(--teal); }

/* ---- 2D marker overlay synced to 3D ---- */
.marker-layer{ position:absolute; inset:0; pointer-events:none; }
.marker{
  position:absolute; width:20px; height:20px; margin:-10px;
  border-radius:50%; cursor:pointer; pointer-events:auto;
  transform: translate(-50%,-50%);
}
.marker-dot{
  position:absolute; inset:0; border-radius:50%;
  background: var(--marker-color, var(--teal));
  border:2px solid rgba(10,14,19,0.85);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--marker-color, var(--teal)) 35%, transparent);
}
.marker-ping{
  position:absolute; inset:-6px; border-radius:50%;
  border:1.5px solid var(--marker-color, var(--teal));
  animation: ping 2.4s ease-out infinite;
  opacity:0;
}
@keyframes ping{
  0%{ transform:scale(0.6); opacity:.7; }
  70%{ transform:scale(1.9); opacity:0; }
  100%{ opacity:0; }
}
.marker.selected .marker-dot{ background: var(--bone); }
.marker-label{
  position:absolute; left:26px; top:50%; transform:translateY(-50%);
  white-space:nowrap; font-family:var(--mono); font-size:10.5px;
  color: var(--bone); background: rgba(10,14,19,0.82);
  border:1px solid var(--line-strong);
  padding:4px 8px; border-radius:6px;
  opacity:0; transition: opacity .15s ease;
}
.marker:hover .marker-label{ opacity:1; }

/* ============ DOSSIER (RIGHT) ============ */
.dossier-head{ display:flex; flex-direction:column; gap:8px; }
.dossier-title{ font-family: var(--serif); font-size:30px; font-weight:500; margin:2px 0 0; }
.dossier-tagline{ font-family: var(--serif); font-style:italic; color: var(--teal); font-size:14.5px; margin:0; }
.dossier-desc{ font-size:13.5px; line-height:1.6; color: var(--bone-dim); margin:2px 0 4px; border-top:1px solid var(--line); padding-top:16px; }

.fact-block{ display:flex; flex-direction:column; gap:10px; }
.fact-list{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; }
.fact-list li{
  display:flex; justify-content:space-between; gap:10px;
  padding:9px 0; border-bottom:1px solid var(--line);
  font-size:12.5px;
}
.fact-list li:last-child{ border-bottom:none; }
.fact-key{ color: var(--bone-dim); }
.fact-val{ color: var(--bone); text-align:right; font-family:var(--mono); font-size:11.5px; }

.callout{
  border-radius:12px; padding:13px 14px;
  border:1px solid var(--line-strong);
  display:flex; flex-direction:column; gap:6px;
}
.callout p{ margin:0; font-size:12.5px; line-height:1.55; color: var(--bone-dim); }
.callout-label{ font-family:var(--mono); font-size:10.5px; letter-spacing:.05em; }
.callout-med{ background: rgba(216,119,110,0.08); }
.callout-med .callout-label{ color: var(--rose); }
.callout-fact{ background: var(--amber-dim); }
.callout-fact .callout-label{ color: var(--amber); }

.marker-note{
  position:absolute; left:18px; right:18px; bottom:18px;
  background: var(--panel-2); border:1px solid var(--line-strong);
  border-radius:12px; padding:16px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}
.marker-note h3{ font-family:var(--serif); font-weight:500; font-size:18px; margin:6px 0 6px; }
.marker-note p{ font-size:12.5px; line-height:1.55; color: var(--bone-dim); margin:0; }

/* ============ LOADING ============ */
.loading{
  position:fixed; inset:0; background: var(--ink);
  display:flex; flex-direction:column; align-items:center; justify-content:center; gap:16px;
  z-index:50; transition: opacity .5s ease;
}
.loading.done{ opacity:0; pointer-events:none; }
.loading-mark{ font-family:var(--serif); font-size:26px; letter-spacing:.1em; color:var(--bone); }
.loading-bar{ width:180px; height:2px; background: var(--line-strong); overflow:hidden; border-radius:2px; }
.loading-bar span{ display:block; height:100%; width:40%; background: var(--teal); animation: load 1.1s ease-in-out infinite; }
@keyframes load{ 0%{ transform:translateX(-100%);} 100%{ transform:translateX(340%);} }

/* ============ RESPONSIVE ============ */
@media (max-width: 1080px){
  .app{ grid-template-columns: 240px 1fr; }
  .rail-right{ position:fixed; top:0; right:0; bottom:0; width:320px; z-index:30; box-shadow:-20px 0 40px rgba(0,0,0,0.5); }
  .rail-right.hidden{ display:none; }
}
@media (max-width: 720px){
  .app{ grid-template-columns: 1fr; }
  .rail-left{ position:fixed; top:0; left:0; bottom:0; width:78%; max-width:300px; z-index:30; transform: translateX(-100%); transition: transform .3s ease; box-shadow: 20px 0 40px rgba(0,0,0,0.5); }
  .rail-left.open{ transform: translateX(0); }
  .toolbar{ flex-direction:row; left:50%; top:auto; bottom:64px; transform:translateX(-50%); }
  .tip-card{ display:none; }
}

:focus-visible{ outline: 2px solid var(--teal); outline-offset:2px; }

@media (prefers-reduced-motion: reduce){
  .marker-ping{ animation:none; }
  .loading-bar span{ animation:none; }
}