/* ============================================================
   Human Saga — visual system
   Dependency-light, vanilla CSS. All JS hooks preserved:
   .stat/.n/.l, .tab[data-view], .gbar/.imp5, .grow, .tick,
   .era-band/.tl/.ev/.mk/.date/.ti/.b, .modal/.mh/.x/.kv/.pillk/
   .meta-line/.src, .ae, .legend, .demo-flag, #stats, etc.
   ============================================================ */
:root{
  /* surfaces — deep warm ink */
  --bg:#0b0f17;--bg2:#141b28;--bg3:#1b2433;--panel:#161e2c;
  --line:#27313f;--line-2:#323e4e;
  /* type */
  --text:#eaf0f7;--text-2:#cdd7e3;--muted:#94a4b6;
  /* accents */
  --gold:#e4b765;--gold-2:#caa14f;--gold-soft:rgba(228,183,101,.14);
  --accent:#7aa2f7;--accent-soft:rgba(122,162,247,.14);
  /* region palette (mirrors data.js) */
  --r-west:#e0a23c;--r-east:#e0584f;--r-south:#c879d8;--r-se:#3bb1a8;--r-central:#d8c24a;
  --r-africa:#5bbf7a;--r-europe:#5b8def;--r-americas:#e08a4a;--r-oceania:#7c9ce0;--r-global:#b0b8c4;
  /* category palette (mirrors data.js) */
  --c-pol:#e0a23c;--c-mil:#e05a5a;--c-exp:#3bb1b0;--c-sci:#5b8def;--c-cul:#a98bd6;
  --c-rel:#7c7ce0;--c-eco:#5bbf7a;--c-soc:#d77bb0;--c-env:#9fcf57;
  /* spacing scale */
  --s1:4px;--s2:8px;--s3:12px;--s4:16px;--s5:24px;--s6:32px;--s7:48px;
  /* radii */
  --r1:8px;--r2:12px;--r3:16px;--r4:22px;
  /* elevation */
  --shadow:0 1px 2px rgba(0,0,0,.3),0 6px 24px rgba(0,0,0,.22);
  --shadow-lg:0 20px 60px rgba(3,6,12,.6);
  /* type families */
  --display:"Fraunces",Georgia,"Times New Roman",serif;
  --ui:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;color:var(--text);font-family:var(--ui);line-height:1.55;font-size:15px;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  background:
    radial-gradient(1100px 520px at 82% -8%,rgba(228,183,101,.06),transparent 60%),
    radial-gradient(1200px 600px at 8% -4%,rgba(122,162,247,.06),transparent 55%),
    var(--bg);
  background-attachment:fixed;
}
h1,h2,h3,.serif{font-family:var(--display);font-weight:600;letter-spacing:.1px}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
.muted{color:var(--muted)}
.hide{display:none!important}
::selection{background:var(--gold-soft);color:var(--text)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}

/* ---------- header / hero ---------- */
.top{
  position:relative;padding:34px 0 20px;border-bottom:1px solid var(--line);
  background:
    radial-gradient(820px 360px at 78% -50%,rgba(228,183,101,.12),transparent 62%),
    radial-gradient(900px 420px at 12% -30%,rgba(122,162,247,.10),transparent 58%),
    linear-gradient(180deg,#0d131d,var(--bg));
}
.top:after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,var(--gold-2),transparent);opacity:.5}
.brand-row{display:flex;align-items:center;gap:14px}
.brand{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap}
.top h1{margin:0;font-size:clamp(30px,4.4vw,44px);font-weight:600;letter-spacing:-.3px;line-height:1}
.top h1 .o{color:var(--gold);text-shadow:0 0 22px rgba(228,183,101,.45)}
.tagline{font-family:var(--display);font-style:italic;font-weight:400;color:var(--muted);font-size:15px}
.hero-lede{max-width:660px;margin:16px 0 0;color:var(--text-2);font-size:16px;line-height:1.6}
.demo-flag{
  margin-left:auto;align-self:flex-start;font-size:10.5px;letter-spacing:1.3px;text-transform:uppercase;
  color:#0c1018;background:linear-gradient(180deg,var(--gold),var(--gold-2));
  padding:5px 12px;border-radius:999px;font-weight:700;white-space:nowrap;box-shadow:0 2px 10px rgba(228,183,101,.25)}
.stats{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
.stat{
  background:linear-gradient(180deg,var(--bg2),rgba(20,27,40,.6));border:1px solid var(--line);
  border-radius:var(--r2);padding:11px 17px;min-width:96px;transition:border-color .2s,transform .2s}
.stat:hover{border-color:var(--line-2);transform:translateY(-1px)}
.stat .n{font-family:var(--display);font-size:23px;font-weight:600;color:var(--gold);line-height:1.1}
.stat .l{font-size:10px;text-transform:uppercase;letter-spacing:1px;color:var(--muted);margin-top:3px}

/* ---------- tabs ---------- */
.tabs{display:flex;gap:4px;padding:16px 24px 0;border-bottom:1px solid var(--line);overflow-x:auto;scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tab{
  padding:10px 18px;border:1px solid transparent;border-bottom:none;border-radius:10px 10px 0 0;
  background:transparent;color:var(--muted);cursor:pointer;font-size:14px;font-family:var(--ui);font-weight:500;
  white-space:nowrap;position:relative;top:1px;transition:color .18s,background .18s}
.tab:hover{color:var(--text-2);background:rgba(255,255,255,.03)}
.tab.active{
  background:var(--bg3);color:var(--text);font-weight:600;border-color:var(--line);
  box-shadow:inset 0 2px 0 var(--gold)}
main.wrap{padding-top:24px}
.view{padding:8px 0 80px;animation:fade .35s ease}
@keyframes fade{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}

/* ---------- shared card surface ---------- */
.map-controls,.map-side,.ev,.modal,.stat{background-clip:padding-box}

/* ---------- map ---------- */
.map-controls{display:flex;align-items:center;gap:16px;background:var(--panel);border:1px solid var(--line);
  border-radius:var(--r3);padding:13px 18px;margin-bottom:16px;box-shadow:var(--shadow)}
.play{width:40px;height:40px;border-radius:50%;border:none;cursor:pointer;flex:none;font-size:15px;
  color:#0c1018;background:linear-gradient(180deg,var(--gold),var(--gold-2));
  box-shadow:0 3px 12px rgba(228,183,101,.3);transition:transform .15s,box-shadow .15s}
.play:hover{transform:scale(1.07)}
.play.on{background:linear-gradient(180deg,var(--accent),#5b86e0);box-shadow:0 3px 12px var(--accent-soft);color:#08101f}
#yearSlider{flex:1;accent-color:var(--gold);height:6px;cursor:pointer}
.year-readout{font-family:var(--display);font-size:24px;color:var(--gold);min-width:128px;text-align:right;font-weight:600;font-variant-numeric:tabular-nums}
.map-note{font-size:12px;color:var(--muted);min-width:90px}
.map-stage{display:grid;grid-template-columns:1fr 300px;gap:16px}
@media(max-width:840px){.map-stage{grid-template-columns:1fr}}
#map{height:560px;border-radius:var(--r3);border:1px solid var(--line);background:#0a0e14;box-shadow:var(--shadow)}
.map-side{background:var(--panel);border:1px solid var(--line);border-radius:var(--r3);padding:16px 18px;max-height:560px;overflow:auto;box-shadow:var(--shadow)}
.map-side h3{margin:0 0 4px;font-size:17px;color:var(--gold)}
.map-side .ae{display:flex;align-items:center;gap:9px;padding:8px 0;border-bottom:1px dashed var(--line);cursor:pointer;font-size:13px;transition:color .15s}
.map-side .ae:last-child{border-bottom:none}
.map-side .ae:hover{color:var(--accent)}
.map-side .ae i{width:11px;height:11px;border-radius:3px;flex:none;box-shadow:0 0 8px currentColor}
.fineprint{font-size:12px;color:var(--muted);margin-top:12px}
.leaflet-popup-content-wrapper{background:var(--panel);color:var(--text);border-radius:var(--r2);box-shadow:var(--shadow-lg)}
.leaflet-popup-tip{background:var(--panel)}

/* ---------- shared controls ---------- */
.controls{display:flex;gap:11px;flex-wrap:wrap;align-items:center;padding:16px 0;border-bottom:1px solid var(--line);margin-bottom:10px}
.controls input[type=search],.controls select{
  background:var(--bg);border:1px solid var(--line);color:var(--text);border-radius:var(--r1);
  padding:10px 13px;font-size:13px;font-family:inherit;transition:border-color .15s,box-shadow .15s}
.controls input[type=search]:focus,.controls select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.controls input[type=search]{min-width:240px}
.controls input[type=search]::placeholder{color:var(--muted)}
.toggle{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:13px;cursor:pointer;user-select:none}
.toggle input{accent-color:var(--gold)}
.count{margin-left:auto;color:var(--muted);font-size:13px;font-variant-numeric:tabular-nums}

/* ---------- empires gantt ---------- */
.axis{position:relative;height:30px;margin:0 0 8px;border-bottom:1px solid var(--line)}
.axis .tick{position:absolute;top:0;transform:translateX(-50%);font-size:11px;color:var(--muted);font-variant-numeric:tabular-nums}
.axis .tick:after{content:"";position:absolute;left:50%;top:20px;height:8px;width:1px;background:var(--line-2)}
.grow{position:relative;height:26px;margin:4px 0}
.gbar{position:absolute;top:2px;height:20px;border-radius:5px;cursor:pointer;display:flex;align-items:center;
  overflow:hidden;white-space:nowrap;font-size:11px;color:#0c1018;font-weight:600;padding:0 8px;
  box-shadow:0 1px 3px rgba(0,0,0,.35);transition:filter .15s,transform .15s,box-shadow .15s}
.gbar:hover{filter:brightness(1.14) saturate(1.05);transform:translateY(-1px);z-index:5;box-shadow:0 4px 14px rgba(0,0,0,.45)}
.gbar.imp5{outline:2px solid var(--gold);outline-offset:-2px}

/* ---------- events timeline ---------- */
.era-band{margin:34px 0 10px;display:flex;align-items:center;gap:14px}
.era-band h2{margin:0;font-size:19px;color:var(--gold)}
.era-band .span{color:var(--muted);font-size:12px;font-variant-numeric:tabular-nums}
.era-band .hr{flex:1;height:1px;background:linear-gradient(90deg,var(--line-2),transparent)}
.tl{position:relative;margin-left:14px;border-left:2px solid var(--line)}
.ev{position:relative;margin:0 0 12px 28px;background:var(--panel);border:1px solid var(--line);
  border-radius:var(--r2);padding:13px 16px;cursor:pointer;transition:border-color .18s,transform .18s,box-shadow .18s}
.ev:hover{border-color:var(--accent);transform:translateX(2px);box-shadow:var(--shadow)}
.ev .mk{position:absolute;left:-36px;top:16px;width:12px;height:12px;border-radius:50%;border:2px solid var(--bg);box-shadow:0 0 0 2px currentColor,0 0 12px currentColor}
.ev .date{font-size:12px;color:var(--gold);font-weight:600;letter-spacing:.2px}
.ev .ti{font-family:var(--display);font-size:17px;font-weight:500;margin:3px 0 7px;line-height:1.3}
.b{display:inline-block;font-size:10px;padding:3px 9px;border-radius:5px;color:#0c1018;font-weight:700;text-transform:capitalize;letter-spacing:.2px}

/* ---------- modal ---------- */
.overlay{position:fixed;inset:0;background:rgba(5,8,12,.72);backdrop-filter:blur(4px);display:none;align-items:center;justify-content:center;z-index:9999;padding:20px;animation:fade .2s ease}
.overlay.show{display:flex}
.modal{background:var(--panel);border:1px solid var(--line-2);border-radius:var(--r4);max-width:640px;width:100%;max-height:86vh;overflow:auto;box-shadow:var(--shadow-lg);animation:pop .25s cubic-bezier(.2,.8,.2,1)}
@keyframes pop{from{opacity:0;transform:translateY(12px) scale(.98)}to{opacity:1;transform:none}}
.modal .mh{padding:22px 26px 14px;border-bottom:1px solid var(--line);position:sticky;top:0;background:linear-gradient(180deg,var(--panel),rgba(22,30,44,.92));backdrop-filter:blur(6px)}
.modal .mh .x{float:right;cursor:pointer;color:var(--muted);font-size:24px;line-height:1;border:none;background:none;transition:color .15s}
.modal .mh .x:hover{color:var(--text)}
.modal h3{margin:0 0 4px;font-size:24px;font-weight:600;line-height:1.2}
.modal .sub{font-size:12px;font-weight:700;letter-spacing:1px}
.modal .mb{padding:18px 26px 26px}
.modal .mb p{color:var(--text-2);line-height:1.65}
.kv{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 16px}
.kv .pillk{font-size:12px;background:var(--bg);border:1px solid var(--line);border-radius:999px;padding:5px 12px;color:var(--muted)}
.kv .pillk b{color:var(--text)}
.meta-line{font-size:13px;color:var(--muted);margin:12px 0 0}
.src a{display:block;font-size:13px;margin:4px 0}

/* ---------- prose / legend / footer ---------- */
.prose{max-width:740px}.prose h2{font-size:26px;margin:0 0 14px}.prose p{color:var(--text-2);line-height:1.7}
.prose code{background:var(--bg2);padding:2px 7px;border-radius:5px;font-size:.92em}
.legend{display:flex;gap:14px;flex-wrap:wrap;margin-top:12px;font-size:12px;color:var(--muted)}
.legend span{display:inline-flex;align-items:center;gap:6px}
.legend i{width:11px;height:11px;border-radius:3px}
footer{border-top:1px solid var(--line);padding:24px 0 56px;color:var(--muted);font-size:13px;margin-top:24px}

/* ---------- responsive ---------- */
@media(max-width:560px){
  .wrap{padding:0 16px}
  .top{padding:24px 0 16px}
  .hero-lede{font-size:15px}
  .stats{gap:8px}
  .stat{min-width:calc(50% - 4px);flex:1 1 calc(50% - 4px)}
  .controls input[type=search]{min-width:0;flex:1}
  .year-readout{font-size:20px;min-width:96px}
  .tabs{padding:12px 16px 0}
}

/* ---------- segmented toggle ---------- */
.segmented{display:inline-flex;border:1px solid var(--line);border-radius:9px;overflow:hidden;background:var(--bg2)}
.seg{padding:9px 14px;border:none;background:transparent;color:var(--muted);cursor:pointer;font-family:var(--ui);font-size:13px;font-weight:500;line-height:1}
.seg+.seg{border-left:1px solid var(--line)}
.seg:hover{color:var(--text-2)}
.seg.active{background:var(--bg3);color:var(--text);box-shadow:inset 0 2px 0 var(--gold)}

/* ---------- swimlane (scoped to .swim-host so it never clashes with the vertical gantt's .axis/.tick) ---------- */
.swim-host{margin-top:4px}
.swim-toolbar{display:flex;align-items:center;gap:14px;margin:2px 0 10px;flex-wrap:wrap}
.swim-toolbar .zoom{display:flex;align-items:center;gap:8px}
.swim-toolbar .btn{width:32px;height:32px;border-radius:8px;border:1px solid var(--line);background:var(--bg2);color:var(--text);font-size:17px;line-height:1;cursor:pointer;transition:background .15s,border-color .15s}
.swim-toolbar .btn:hover{background:var(--bg3);border-color:var(--line-2)}
.swim-toolbar .zlbl{font-size:12px;color:var(--muted);min-width:76px}
.swim-hint{font-size:12px;color:var(--muted)}
.swim-host .chart-scroll{position:relative;overflow:auto;max-height:calc(100vh - 250px);border:1px solid var(--line);border-radius:14px;background:var(--panel);box-shadow:var(--shadow)}
.swim-host .chart-inner{position:relative}
.swim-host .grid{position:absolute;top:0;left:0;z-index:0;pointer-events:none}
.swim-host .gl{position:absolute;top:0;bottom:0;width:1px;background:var(--line)}
.swim-host .gl.major{background:var(--line-2)}
.swim-host .divider{position:absolute;top:0;bottom:0;width:0;border-left:1px dashed var(--gold);opacity:.6}
.swim-host .divlabel{position:absolute;top:46px;transform:translateX(-50%);font-size:10px;letter-spacing:.5px;color:var(--gold);opacity:.85;white-space:nowrap}
.swim-host .erashade{position:absolute;top:0;bottom:0;background:rgba(255,255,255,.022)}
.swim-host .eralabel{position:absolute;top:46px;font-size:10.5px;letter-spacing:.4px;color:var(--muted);opacity:.65;white-space:nowrap;text-transform:uppercase}
.swim-host .axis{position:sticky;top:0;height:40px;z-index:7;background:linear-gradient(180deg,var(--bg3),var(--bg2));border-bottom:1px solid var(--line-2);margin:0}
.swim-host .axis .corner{position:sticky;left:0;width:132px;height:100%;z-index:8;background:var(--bg3);border-right:1px solid var(--line-2);display:flex;align-items:center;padding-left:14px;font-size:11px;letter-spacing:.8px;text-transform:uppercase;color:var(--muted);font-weight:600}
.swim-host .tick{position:absolute;top:0;height:40px;display:flex;align-items:center;font-size:11px;color:var(--muted);transform:translateX(-50%);font-variant-numeric:tabular-nums;white-space:nowrap}
.swim-host .tick:after{display:none}
.swim-host .tick.erat{font-weight:600;color:var(--text-2);text-transform:none;letter-spacing:.2px;font-size:12px}
.swim-host .lanes{position:relative;z-index:1}
.swim-host .lane{position:relative;border-bottom:1px solid var(--line)}
.swim-host .lane:last-child{border-bottom:none}
.swim-host .lane-label{position:sticky;left:0;width:132px;height:100%;z-index:5;display:flex;align-items:center;gap:8px;padding:0 12px;font-size:13px;font-weight:600;background:linear-gradient(90deg,var(--panel) 85%,rgba(22,30,44,.85));border-right:1px solid var(--line-2)}
.swim-host .lane-label i{width:10px;height:10px;border-radius:3px;flex:none;box-shadow:0 0 8px currentColor}
.swim-host .lane-label .lt{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;text-transform:capitalize}
.swim-host .lane-label .rc{font-size:11px;color:var(--muted);font-weight:500;margin-left:auto;padding-left:6px}
.swim-host .hbar{position:absolute;height:22px;border-radius:5px;cursor:pointer;display:flex;align-items:center;overflow:hidden;white-space:nowrap;font-size:11px;color:#0c1018;font-weight:600;padding:0 7px;box-shadow:0 1px 3px rgba(0,0,0,.35);transition:filter .12s,transform .12s,box-shadow .12s}
.swim-host .hbar:hover{filter:brightness(1.15) saturate(1.05);transform:translateY(-1px);z-index:6;box-shadow:0 5px 16px rgba(0,0,0,.5)}
.swim-host .hbar.imp5{outline:2px solid var(--gold);outline-offset:-2px}
.swim-host .hbar.dim{opacity:.8}
.swim-host .hdot{position:absolute;width:12px;height:12px;border-radius:50%;cursor:pointer;border:1.5px solid rgba(12,16,24,.5);box-shadow:0 1px 3px rgba(0,0,0,.4);transition:transform .12s}
.swim-host .hdot:hover{transform:scale(1.55);z-index:6}
.swim-host .hdot.imp5{box-shadow:0 0 0 2px var(--gold),0 1px 4px rgba(0,0,0,.5)}

/* ---------- motion preference ---------- */
@media(prefers-reduced-motion:reduce){
  *,*:before,*:after{animation-duration:.001ms!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
}