:root{
  --ink:#1a1611;--parchment:#e8e0cf;--line:#8a7a5c;--gold:#b8892b;
  --oxblood:#7a2e26;--teal:#2f5c56;--clay:#a55a34;--plum:#6a3a5c;--slate:#455a64;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%;overscroll-behavior:none}
body{background:var(--ink);color:var(--parchment);
  font-family:"Iowan Old Style","Palatino Linotype",Palatino,Georgia,serif;
  overflow:hidden;-webkit-text-size-adjust:100%;}
header{position:fixed;top:0;left:0;right:0;z-index:40;
  background:linear-gradient(180deg,rgba(20,18,14,.98),rgba(20,18,14,.9));
  border-bottom:1px solid #3a3324;padding:10px 18px 8px;}
.titlerow{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap}
h1{font-size:22px;font-weight:600;letter-spacing:.02em}
h1 .sub{font-family:ui-monospace,"SF Mono",Menlo,monospace;font-size:11px;
  letter-spacing:.18em;text-transform:uppercase;color:var(--gold);margin-left:2px;}
.hint{font-size:12px;color:#a99c7f;font-style:italic;margin-left:auto}
.hint b{color:#c9ba97;font-style:normal}
/* ---- Search ---- */
#searchbox{position:relative;display:flex;align-items:center}
#search{width:190px;max-width:44vw;background:#241f16;border:1px solid #453d2b;border-radius:3px;
  color:var(--parchment);font-family:ui-monospace,monospace;font-size:12px;letter-spacing:.02em;
  padding:5px 26px 5px 10px;outline:none;transition:border-color .15s,width .2s;}
#search::placeholder{color:#7b6f57;letter-spacing:.04em}
#search:focus{border-color:var(--gold);width:230px}
#searchClear{position:absolute;right:4px;top:50%;transform:translateY(-50%);width:20px;height:20px;
  border:none;background:transparent;color:#8a7a5c;font-size:16px;line-height:1;cursor:pointer;
  display:none;align-items:center;justify-content:center;border-radius:50%;}
#searchClear:hover{color:var(--gold)}
#searchbox.has-text #searchClear{display:flex}
#results{position:absolute;top:calc(100% + 6px);left:0;width:320px;max-width:86vw;max-height:52vh;
  overflow-y:auto;background:linear-gradient(180deg,#241f16,#1d1911);border:1px solid #3d3524;
  border-radius:4px;box-shadow:0 14px 38px rgba(0,0,0,.6);z-index:60;display:none;padding:4px}
#results.on{display:block}
.res{display:flex;gap:10px;align-items:baseline;padding:8px 10px;border-radius:3px;cursor:pointer;
  border-left:3px solid transparent;transition:background .1s}
.res:hover,.res.active{background:#2c2619}
.res .rc{width:8px;height:8px;border-radius:50%;flex:none;align-self:center}
.res .rt{font-size:13px;color:var(--parchment);line-height:1.2}
.res .rt em{color:var(--gold);font-style:normal;font-weight:600}
.res .ry{font-family:ui-monospace,monospace;font-size:10px;color:#8a7a5c;margin-left:auto;flex:none;padding-left:8px}
.res-empty{padding:14px 12px;color:#8a7a5c;font-size:12px;font-style:italic;text-align:center}
.res-loading{padding:10px 12px;color:#8a7a5c;font-size:11px;font-style:italic;text-align:center}
.res-divider{padding:8px 10px 4px;font-family:ui-monospace,monospace;font-size:9px;letter-spacing:.12em;
  text-transform:uppercase;color:#8a7a5c;border-top:1px solid #3d3524;margin-top:2px}
.res-divider:first-child{border-top:none;margin-top:0}
.res .rweb{font-family:ui-monospace,monospace;font-size:8px;letter-spacing:.08em;text-transform:uppercase;
  color:#8a7a5c;border:1px solid #453d2b;border-radius:2px;padding:1px 4px;margin-left:6px;flex:none}
.controls{display:flex;gap:6px;flex-wrap:wrap;margin-top:9px;align-items:center}
.jump{font-family:ui-monospace,monospace;font-size:10.5px;letter-spacing:.06em;
  text-transform:uppercase;background:#2a2519;color:#c9ba97;border:1px solid #453d2b;
  padding:4px 9px;border-radius:2px;cursor:pointer;transition:.15s;}
.jump:hover{background:var(--gold);color:#1a1611;border-color:var(--gold)}
.sep{width:1px;height:20px;background:#453d2b;margin:0 4px}
.zoomgrp{display:flex;align-items:center;gap:4px}
.zbtn{font-family:ui-monospace,monospace;font-size:15px;line-height:1;font-weight:700;
  width:26px;height:24px;display:flex;align-items:center;justify-content:center;
  background:#2a2519;color:#c9ba97;border:1px solid #453d2b;border-radius:2px;
  cursor:pointer;transition:.15s;user-select:none;}
.zbtn:hover{background:var(--gold);color:#1a1611;border-color:var(--gold)}
.zlvl{font-family:ui-monospace,monospace;font-size:10px;letter-spacing:.06em;
  color:#a99c7f;min-width:46px;text-align:center;}
.filter{font-family:ui-monospace,monospace;font-size:10.5px;letter-spacing:.04em;
  padding:4px 9px;border-radius:2px;cursor:pointer;transition:.15s;border:1px solid transparent;
  color:#1a1611;font-weight:600;display:flex;align-items:center;gap:5px;user-select:none;}
.filter .dot{width:8px;height:8px;border-radius:50%;background:rgba(0,0,0,.35)}
.filter.off{opacity:.32;filter:grayscale(.5)}

#viewport{position:absolute;top:var(--head-h,86px);left:0;right:0;bottom:var(--mm-h,34px);overflow:hidden;
  cursor:grab;touch-action:none;
  background:radial-gradient(ellipse 60% 80% at 50% 0%,rgba(184,137,43,.05),transparent 70%),var(--ink);}
#viewport.grabbing{cursor:grabbing}
#stage{position:absolute;inset:0}
.baseline{position:absolute;left:0;right:0;height:2px;pointer-events:none;
  background:linear-gradient(90deg,transparent,var(--bc) 1%,var(--bc) 99%,transparent);
  box-shadow:0 0 12px var(--bcg);opacity:.9;will-change:transform}
.band-label{position:absolute;left:0;z-index:6;pointer-events:none;padding:4px 12px;
  background:linear-gradient(90deg,rgba(20,18,14,.92),rgba(20,18,14,.55) 80%,transparent);
  display:flex;flex-direction:column;gap:1px;will-change:transform}
.band-label .bn{font-size:14px;font-weight:600;letter-spacing:.03em;color:var(--bc);
  filter:brightness(1.25);text-shadow:0 1px 4px #000}
.band-label .bs{font-family:ui-monospace,monospace;font-size:9px;letter-spacing:.14em;
  text-transform:uppercase;color:#8a7a5c}
.band.off .baseline{opacity:.18}
.era{position:absolute;top:0;bottom:0;border-left:1px dashed rgba(138,122,92,.28);
  will-change:transform,width;overflow:hidden;}
.era-label{position:absolute;top:8px;left:0;width:100%;text-align:center;padding:0 12px;pointer-events:none}
.era-label .name{font-size:13px;font-weight:600;color:#cdbf9f;letter-spacing:.04em;text-shadow:0 1px 4px #000}
.era-label .span{font-family:ui-monospace,monospace;font-size:9px;color:var(--gold);
  letter-spacing:.1em;text-transform:uppercase;margin-top:2px;}
.ev{position:absolute;top:0;left:0;width:0;will-change:transform;pointer-events:none}
.ev .stem{position:absolute;left:0;top:0;width:1.5px;background:currentColor;opacity:.5;transform:translateX(-50%)}
.ev .node{position:absolute;left:0;top:0;width:11px;height:11px;border-radius:50%;background:currentColor;
  transform:translate(-50%,-50%);border:2px solid var(--ink);
  box-shadow:0 0 0 1px currentColor,0 0 9px currentColor;z-index:2;pointer-events:auto;cursor:pointer;transition:transform .12s;}
.ev .node:hover{transform:translate(-50%,-50%) scale(1.4)}
.ev .card{position:absolute;width:180px;left:-90px;background:linear-gradient(180deg,#241f16,#1d1911);
  border:1px solid #3d3524;border-top:2px solid currentColor;border-radius:3px;padding:7px 9px 8px;
  box-shadow:0 6px 18px rgba(0,0,0,.5);pointer-events:auto;cursor:pointer;transition:border-color .15s,transform .12s;}
.ev .card:hover{border-color:currentColor;transform:translateY(-1px)}
.ev .yr{font-family:ui-monospace,monospace;font-size:10px;font-weight:600;color:currentColor;letter-spacing:.06em;filter:brightness(1.35)}
.ev .lbl{font-size:12px;line-height:1.22;color:var(--parchment);margin-top:2px;font-weight:500}
.ev .tap{font-family:ui-monospace,monospace;font-size:8.5px;letter-spacing:.08em;text-transform:uppercase;
  color:#8a7a5c;margin-top:4px;opacity:0;transition:opacity .15s;}
.ev .card:hover .tap{opacity:1}
.ev.hidden{display:none}
.ev.dim{opacity:.08;filter:grayscale(1)}
.ev.dim .node,.ev.dim .card{pointer-events:none}
.ev.c-learned .card{border-top-style:dashed}
.c-tech{color:var(--gold)}.c-science{color:var(--teal)}.c-society{color:var(--oxblood)}
.c-culture{color:var(--plum)}.c-exploration{color:var(--clay)}.c-power{color:var(--slate)}
.rfilter{font-family:ui-monospace,monospace;font-size:10.5px;letter-spacing:.04em;
  padding:4px 9px;border-radius:2px;cursor:pointer;transition:.15s;border:1px solid #453d2b;
  background:#2a2519;color:#c9ba97;display:flex;align-items:center;gap:5px;user-select:none;}
.rfilter .rd{width:9px;height:9px;border-radius:2px}
.rfilter.off{opacity:.35}

#minimap{position:fixed;left:0;right:0;bottom:0;height:34px;z-index:35;background:#221e15;
  border-top:1px solid #3a3324;cursor:pointer;touch-action:none;}
#mm-view{position:absolute;top:0;bottom:0;background:rgba(184,137,43,.22);
  border-left:2px solid var(--gold);border-right:2px solid var(--gold);min-width:6px;}
.mm-tick{position:absolute;top:0;bottom:0;width:1px;background:rgba(138,122,92,.4);pointer-events:none}
.mm-tick span{position:absolute;bottom:3px;left:4px;font-family:ui-monospace,monospace;font-size:8.5px;
  color:#8a7a5c;white-space:nowrap;letter-spacing:.05em;}

#scrim{position:fixed;inset:0;z-index:45;background:rgba(12,10,7,.55);backdrop-filter:blur(2px);
  opacity:0;pointer-events:none;transition:opacity .2s;}
#scrim.on{opacity:1;pointer-events:auto}
#panel{position:fixed;top:0;right:0;bottom:0;width:min(420px,92vw);z-index:46;
  background:linear-gradient(180deg,#241f16,#191510);border-left:1px solid #3d3524;
  box-shadow:-16px 0 44px rgba(0,0,0,.6);transform:translateX(100%);
  transition:transform .28s cubic-bezier(.2,.7,.2,1);display:flex;flex-direction:column;}
#panel.on{transform:translateX(0)}
.p-top{height:6px;background:currentColor;flex:none}
.p-body{padding:26px 26px 34px;overflow-y:auto}
.p-close{position:absolute;top:14px;right:16px;width:30px;height:30px;border-radius:50%;
  background:#2a2519;border:1px solid #453d2b;color:#c9ba97;font-size:16px;line-height:1;cursor:pointer;
  display:flex;align-items:center;justify-content:center;transition:.15s;z-index:2;}
.p-close:hover{background:var(--gold);color:#1a1611}
.p-cat{font-family:ui-monospace,monospace;font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:currentColor;filter:brightness(1.4)}
.p-web{display:inline-block;margin-left:8px;font-family:ui-monospace,monospace;font-size:9px;letter-spacing:.1em;
  text-transform:uppercase;color:#8a7a5c;border:1px solid #453d2b;border-radius:2px;padding:1px 5px}
.p-yr{font-family:ui-monospace,monospace;font-size:13px;color:var(--gold);letter-spacing:.08em;margin-top:12px}
.p-title{font-size:27px;font-weight:600;line-height:1.15;margin-top:6px;color:var(--parchment)}
.p-rule{height:1px;background:linear-gradient(90deg,currentColor,transparent);margin:18px 0;opacity:.5}
.p-lead{font-size:15px;line-height:1.55;color:#d8ccb0}
.p-more{font-size:14px;line-height:1.62;color:#b3a689;margin-top:14px}
.p-link{display:inline-block;margin-top:14px;font-family:ui-monospace,monospace;font-size:11px;
  letter-spacing:.04em;color:var(--gold);text-decoration:none;border-bottom:1px dotted var(--gold);}
.p-link:hover{color:var(--parchment);border-color:var(--parchment)}
.p-meta{margin-top:22px;display:flex;flex-direction:column;gap:9px}
.p-row{display:flex;gap:10px;font-size:12.5px;line-height:1.4}
.p-row .k{font-family:ui-monospace,monospace;font-size:9.5px;letter-spacing:.1em;text-transform:uppercase;color:#8a7a5c;min-width:74px;padding-top:2px}
.p-row .v{color:#cdbf9f}
.p-nav{display:flex;gap:8px;margin-top:26px}
.p-nav button{flex:1;min-width:0;font-family:ui-monospace,monospace;font-size:10px;letter-spacing:.05em;
  text-transform:uppercase;background:#2a2519;color:#c9ba97;border:1px solid #453d2b;padding:9px 8px;
  border-radius:3px;cursor:pointer;transition:.15s;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.p-nav button:hover:not([disabled]){background:var(--gold);color:#1a1611;border-color:var(--gold)}
#vhint{position:absolute;left:50%;bottom:14px;transform:translateX(-50%);z-index:20;
  font-family:ui-monospace,monospace;font-size:10px;letter-spacing:.1em;text-transform:uppercase;
  color:#b3a689;background:rgba(26,22,17,.82);border:1px solid #3d3524;border-radius:20px;
  padding:5px 13px;pointer-events:none;opacity:0;transition:opacity .3s;white-space:nowrap;
  display:flex;align-items:center;gap:8px;box-shadow:0 4px 14px rgba(0,0,0,.4);}
#vhint .chev{color:var(--gold);font-size:12px;animation:bob 1.8s ease-in-out infinite}
#vhint .chev.down{animation-delay:.9s}
@keyframes bob{0%,100%{transform:translateY(0);opacity:.55}50%{transform:translateY(-2px);opacity:1}}
#recenter{position:absolute;right:14px;bottom:14px;z-index:21;width:38px;height:38px;border-radius:50%;
  background:rgba(26,22,17,.9);border:1px solid #453d2b;color:#c9ba97;font-size:18px;line-height:1;
  cursor:pointer;display:none;align-items:center;justify-content:center;transition:.15s;
  box-shadow:0 4px 14px rgba(0,0,0,.45);}
#recenter:hover{background:var(--gold);color:#1a1611;border-color:var(--gold)}
#recenter.show{display:flex}
@media (max-width:640px){.hint{display:none}h1{font-size:16px}.ev .card{width:150px;left:-75px}
  #vhint{bottom:12px}#recenter{bottom:12px}
  #search{width:150px}#search:focus{width:180px}#results{width:280px}}