:root{
  --bg:#0c0b08; --bg2:#141109; --panel:rgba(22,18,10,.82); --panel-solid:#17130b;
  --gold:#c9a85c; --gold-bright:#ecd292; --gold-dim:#8c7740;
  --line:rgba(201,168,92,.28); --line-soft:rgba(201,168,92,.14);
  --txt:#ece3cf; --txt-dim:#a99e83; --shadow:0 10px 40px rgba(0,0,0,.55);
  --serif:"Cinzel",Georgia,serif; --sans:"Inter",system-ui,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{background:radial-gradient(140% 120% at 50% -10%,#1b160c 0%,var(--bg) 60%) fixed;
  color:var(--txt);font-family:var(--sans);overflow:hidden;-webkit-font-smoothing:antialiased}
button{font-family:inherit;color:inherit;cursor:pointer;border:0;background:none}
img{user-select:none;-webkit-user-drag:none}

#app{position:fixed;inset:0;display:flex;flex-direction:column}

/* ---------------- TOP BAR ---------------- */
#topbar{display:flex;align-items:center;gap:18px;padding:10px 18px;
  background:linear-gradient(var(--bg2),rgba(20,17,9,.6));border-bottom:1px solid var(--line);
  z-index:30;backdrop-filter:blur(6px)}
.brand{display:flex;align-items:center;gap:11px;min-width:0}
.brand-mark{width:34px;height:34px;object-fit:contain;filter:drop-shadow(0 1px 4px #000)}
.brand-text{min-width:0}
.brand-text h1{font-family:var(--serif);font-weight:500;font-size:16px;letter-spacing:.5px;
  color:var(--gold-bright);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand-text span{font-size:11px;color:var(--txt-dim);letter-spacing:1.5px;text-transform:uppercase}
.tabs{display:flex;align-items:center;gap:4px;margin-left:auto;flex-wrap:wrap;justify-content:flex-end}
.tab{padding:8px 14px;border-radius:7px;font-size:13.5px;font-weight:500;color:var(--txt-dim);
  border:1px solid transparent;transition:.18s;letter-spacing:.3px;white-space:nowrap}
.tab:hover{color:var(--gold-bright);background:rgba(201,168,92,.08)}
.tab.active{color:#1a1407;background:linear-gradient(var(--gold-bright),var(--gold));
  box-shadow:0 2px 12px rgba(201,168,92,.3);font-weight:600}
.tab.ghost{font-size:12.5px;color:var(--txt-dim)}
.tab.ghost:hover{color:var(--txt)}
.tab-sep{width:1px;height:22px;background:var(--line);margin:0 6px}
.iconbtn{width:38px;height:38px;border-radius:50%;border:1px solid var(--line);color:var(--gold-bright);
  font-size:16px;display:grid;place-items:center;transition:.18s}
.iconbtn:hover{background:rgba(201,168,92,.12)}
.iconbtn.off{opacity:.4;text-decoration:line-through}

/* ---------------- STAGE ---------------- */
#stage{position:relative;flex:1;overflow:hidden;background:#05070a;cursor:grab}
#stage.grabbing{cursor:grabbing}
#pano-canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
#map-view{position:absolute;inset:0;overflow:hidden;display:none;background:#05070a}
.map-layer{position:absolute;left:0;top:0;transform-origin:0 0;max-width:none;will-change:transform,opacity}
#map-b{opacity:0}
#zoom-readout{position:absolute;right:16px;top:14px;z-index:14;font-size:12px;color:var(--gold-bright);
  background:var(--panel);border:1px solid var(--line-soft);border-radius:20px;padding:4px 12px;
  letter-spacing:1px;opacity:0;transition:opacity .3s;pointer-events:none}
#zoom-readout.show{opacity:1}

/* hotspots */
#hotspots{position:absolute;inset:0;pointer-events:none}
.hot{position:absolute;width:30px;height:30px;margin:-15px 0 0 -15px;pointer-events:auto;cursor:pointer}
.hot i{position:absolute;inset:10px;border-radius:50%;background:var(--gold-bright);
  box-shadow:0 0 0 0 rgba(236,210,146,.6);animation:pulse 2.4s infinite}
.hot:hover i{inset:8px;background:#fff}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(236,210,146,.55)}70%{box-shadow:0 0 0 14px rgba(236,210,146,0)}100%{box-shadow:0 0 0 0 rgba(236,210,146,0)}}
#tooltip{position:absolute;z-index:18;padding:5px 10px;background:var(--panel-solid);border:1px solid var(--line);
  border-radius:6px;font-size:12.5px;color:var(--gold-bright);pointer-events:none;opacity:0;transition:opacity .15s;
  white-space:nowrap;transform:translate(-50%,-130%);box-shadow:var(--shadow);letter-spacing:.3px}
#labelbar{position:absolute;left:50%;bottom:22px;transform:translateX(-50%) translateY(8px);z-index:19;
  opacity:0;transition:.3s;pointer-events:none;filter:drop-shadow(0 6px 14px rgba(0,0,0,.7))}
#labelbar.show{opacity:1;transform:translateX(-50%) translateY(0)}
#labelbar img{display:block;height:30px}

/* floating controls */
#controls{position:absolute;right:16px;bottom:16px;z-index:20;display:flex;flex-direction:column;gap:8px}
.cbtn{width:42px;height:42px;border-radius:11px;background:var(--panel);border:1px solid var(--line);
  color:var(--gold-bright);font-size:20px;display:grid;place-items:center;backdrop-filter:blur(8px);
  transition:.16s;box-shadow:var(--shadow)}
.cbtn:hover{background:rgba(201,168,92,.18);border-color:var(--gold)}
.cbtn.active{background:linear-gradient(var(--gold-bright),var(--gold));color:#1a1407}

/* thematic layers panel (map mode) */
#layers{position:absolute;left:16px;bottom:16px;z-index:20;max-width:300px;
  background:var(--panel);border:1px solid var(--line);border-radius:13px;padding:12px 13px;
  backdrop-filter:blur(8px);box-shadow:var(--shadow);display:none}
.layers-title{font-family:var(--serif);font-size:12px;letter-spacing:1px;color:var(--gold-bright);
  text-transform:uppercase;margin-bottom:9px}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip{padding:6px 11px;border-radius:20px;font-size:12.5px;color:var(--txt-dim);
  border:1px solid var(--line-soft);background:rgba(0,0,0,.25);transition:.15s}
.chip:hover{color:var(--gold-bright);border-color:var(--gold)}
.chip.active{color:#1a1407;background:linear-gradient(var(--gold-bright),var(--gold));border-color:var(--gold);font-weight:600}
.ai-row{display:flex;align-items:center;gap:10px;margin-top:11px;padding-top:10px;border-top:1px solid var(--line-soft);
  font-size:12px;color:var(--txt-dim);letter-spacing:.5px}
.ai-toggle{margin-left:auto;padding:6px 12px;border-radius:20px;font-size:12px;font-weight:600;
  border:1px solid var(--line);color:var(--txt-dim);background:rgba(0,0,0,.25);transition:.16s}
.ai-toggle.on{color:#1a1407;background:linear-gradient(var(--gold-bright),var(--gold));border-color:var(--gold)}
.ai-toggle:hover{border-color:var(--gold)}

.hint{position:absolute;left:50%;top:14px;transform:translateX(-50%);z-index:15;font-size:12.5px;
  color:var(--txt-dim);background:var(--panel);border:1px solid var(--line-soft);border-radius:20px;
  padding:5px 14px;opacity:0;transition:opacity .4s;pointer-events:none;letter-spacing:.3px}
.hint.show{opacity:1}
#loading{position:absolute;inset:0;display:none;place-items:center;z-index:16;background:rgba(5,7,10,.6)}
#loading.show{display:grid}
#loading span{font-family:var(--serif);color:var(--gold-bright);letter-spacing:3px;font-size:15px;
  padding:10px 22px;border:1px solid var(--line);border-radius:30px;background:var(--panel-solid)}

/* ---------------- ERA TIMELINE ---------------- */
#timeline{position:relative;padding:14px 40px 16px;background:linear-gradient(rgba(20,17,9,.5),var(--bg2));
  border-top:1px solid var(--line);z-index:25}
.tl-track{position:relative;height:34px;display:flex;align-items:center;justify-content:space-between;margin:0 6px}
.tl-track:before{content:"";position:absolute;left:0;right:0;top:50%;height:2px;
  background:linear-gradient(90deg,transparent,var(--gold-dim),transparent)}
.tl-node{position:relative;display:flex;flex-direction:column;align-items:center;gap:6px;
  background:none;color:var(--txt-dim);transition:.18s;z-index:2}
.tl-dot{width:13px;height:13px;border-radius:50%;background:var(--bg2);border:2px solid var(--gold-dim);transition:.18s}
.tl-year{font-family:var(--serif);font-size:14px;letter-spacing:1px;transition:.18s}
.tl-node:hover{color:var(--gold-bright)}
.tl-node:hover .tl-dot{border-color:var(--gold-bright);transform:scale(1.15)}
.tl-node.active{color:var(--gold-bright)}
.tl-node.active .tl-dot{background:var(--gold-bright);border-color:var(--gold-bright);
  box-shadow:0 0 0 5px rgba(236,210,146,.18),0 0 16px rgba(236,210,146,.5)}
.tl-node.active .tl-year{font-size:16px;text-shadow:0 0 12px rgba(236,210,146,.4)}
.tl-caption{text-align:center;margin-top:9px;font-size:13px;color:var(--txt-dim);letter-spacing:.5px;height:16px}
.tl-caption b{color:var(--gold-bright);font-weight:600}

/* ---------------- INTRO ---------------- */
#intro{position:absolute;inset:0;z-index:60;display:flex;flex-direction:column;align-items:center;justify-content:center;
  background:radial-gradient(circle at 50% 42%,#241d0e 0%,#070603 72%);transition:opacity .8s;text-align:center}
#intro.hide{opacity:0;pointer-events:none}
.intro-glow{position:absolute;width:760px;height:760px;border-radius:50%;
  background:radial-gradient(circle,rgba(201,168,92,.18),transparent 62%);filter:blur(20px)}
#intro-eagle{position:relative;width:min(54vw,540px);filter:drop-shadow(0 10px 40px rgba(0,0,0,.7));
  -webkit-mask-image:radial-gradient(circle at 50% 44%,#000 56%,transparent 72%);
          mask-image:radial-gradient(circle at 50% 44%,#000 56%,transparent 72%)}
.intro-copy{position:relative;margin-top:-40px}
.intro-copy h2{font-family:var(--serif);font-weight:500;font-size:clamp(24px,4vw,40px);color:var(--gold-bright);
  line-height:1.16;letter-spacing:1px;text-shadow:0 3px 16px #000}
.intro-copy h2 b{font-weight:700}
.intro-author{margin-top:12px;font-size:15px;letter-spacing:3px;color:#d8c89a;text-transform:uppercase}
.enter{margin-top:22px;padding:13px 46px;font-family:var(--serif);font-size:18px;letter-spacing:4px;
  color:#1a1407;background:linear-gradient(var(--gold-bright),var(--gold));border-radius:6px;
  box-shadow:0 8px 30px rgba(201,168,92,.35);transition:.2s}
.enter:hover{transform:translateY(-2px);box-shadow:0 12px 38px rgba(201,168,92,.5)}
.intro-sub{margin-top:18px;font-size:12px;letter-spacing:2px;color:#8c7d56}

/* ---------------- INFO (modern panels) ---------------- */
#info{position:absolute;inset:0;z-index:55;display:none;place-items:center;padding:28px;
  background:rgba(4,4,7,.86);backdrop-filter:blur(6px)}
#info.show{display:grid}
.info-modal{width:min(880px,94vw);max-height:88vh;display:flex;flex-direction:column;
  background:linear-gradient(180deg,#1a160d,#120f08);border:1px solid var(--line);border-radius:16px;
  box-shadow:0 30px 80px rgba(0,0,0,.6);overflow:hidden;animation:rise .35s ease}
@keyframes rise{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.info-head{display:flex;align-items:center;gap:10px;padding:10px 12px;border-bottom:1px solid var(--line);
  background:linear-gradient(var(--bg2),rgba(20,17,9,.4))}
.info-tabs{display:flex;gap:4px;flex-wrap:wrap;flex:1}
.info-tab{padding:8px 15px;border-radius:8px;font-size:13.5px;font-weight:500;color:var(--txt-dim);
  border:1px solid transparent;transition:.16s;white-space:nowrap}
.info-tab:hover{color:var(--gold-bright);background:rgba(201,168,92,.08)}
.info-tab.active{color:#1a1407;background:linear-gradient(var(--gold-bright),var(--gold));font-weight:600}
.info-close{width:38px;height:38px;border-radius:50%;border:1px solid var(--line);color:var(--gold-bright);
  font-size:16px;background:var(--panel);flex:none}
.info-close:hover{background:rgba(201,168,92,.18)}
.info-body{padding:30px 38px;overflow-y:auto;line-height:1.62}
.info-body::-webkit-scrollbar{width:10px}
.info-body::-webkit-scrollbar-thumb{background:var(--gold-dim);border-radius:6px;border:3px solid #120f08}
.info-body h2{font-family:var(--serif);font-weight:700;font-size:24px;color:var(--gold-bright);
  letter-spacing:1px;margin-bottom:6px}
.info-body .lead{color:var(--txt);font-size:15.5px}
.info-body p{margin:0 0 14px;color:#d9cfb6;font-size:14.5px}
.info-body h4{font-family:var(--serif);font-size:14px;letter-spacing:1px;color:var(--gold);
  text-transform:uppercase;margin:22px 0 8px;border-bottom:1px solid var(--line-soft);padding-bottom:5px}
.info-body ul{list-style:none;margin:0 0 8px;padding:0}
.info-body li{position:relative;padding-left:18px;margin-bottom:7px;color:#cfc4a8;font-size:13.6px}
.info-body li:before{content:"›";position:absolute;left:0;color:var(--gold-dim)}
.src{display:grid;grid-template-columns:90px 1fr;gap:6px 14px;margin-bottom:6px;font-size:13.6px}
.src dt{font-family:var(--serif);color:var(--gold);font-size:13.5px}
.src dd{margin:0;color:#cfc4a8}
.credit{text-align:center;margin:18px 0}
.credit .role{font-size:12.5px;letter-spacing:1px;color:var(--txt-dim);text-transform:uppercase}
.credit .name{font-family:var(--serif);font-size:21px;color:var(--gold-bright);margin-top:3px}
.credit .sub{font-size:13px;color:#bcb091;margin-top:2px}
.info-note{margin-top:16px;padding:13px 16px;border:1px solid var(--line-soft);border-radius:10px;
  background:rgba(201,168,92,.05);font-size:13px;color:#bcb091}
.info-note a{color:var(--gold-bright)}
.info-foot{padding:9px 16px;border-top:1px solid var(--line);font-size:11.5px;color:var(--txt-dim);
  text-align:center;letter-spacing:.5px}

/* ---------------- responsive ---------------- */
@media (max-width:880px){
  .brand-text h1{font-size:13px;white-space:normal}
  .tab.ghost{display:none}
  .tabs{gap:2px}
  #timeline{padding:12px 16px 14px}
  .tl-year{font-size:12px}
}