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<!doctype html>
<!--
CHAKRA — Temporal Cycle Observatory · landing
The hero IS the instrument: drag the astrolabe sideways to scrub time and
watch ten calendars, the lagna, the Moon's terminator and the coming-up
board follow. Tap the little Earth to compute for somewhere else.
Everything on this page is computed live by src/chakra-core.js — offline,
no trackers, no dependencies. index.html?api=… still serves JSON.
Copyright (C) 1993-2026 Abhishek Choudhary. Sole author.
SPDX-License-Identifier: GPL-3.0-or-later
Site text: CC BY-SA 4.0. Distributed WITHOUT ANY WARRANTY.
Study & heritage computation only — see DISCLAIMER.md.
-->
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<div class="hero wrap">
<div class="aurora" aria-hidden="true"></div>
<div class="eyebrow">Temporal Cycle Observatory</div>
<h1 class="title"><span class="tx">CHAKRA</span><span class="dot">◉</span></h1>
<p class="tag">One sky. Many calendars. All of it computed, none of it looked up.</p>
<div class="instr" id="instr" role="img" aria-label="The Moon as it appears right now, inside a zodiac ring showing the true positions of the Sun and planets. Drag sideways to travel in time.">
<svg id="astro" viewBox="0 0 460 460"></svg>
</div>
<div class="nowline" id="nowline">reading the sky…</div>
<div class="nowsub" id="nowsub"></div>
<div class="scrub" id="scrub"></div>
<div class="hint">⟵ drag the instrument to scrub time · double-tap to return ⟶</div>
<div class="ctas">
<a class="cta primary" data-keep-theme href="pro.html">Open the Observatory →</a>
<a class="cta ghost" data-keep-theme href="learn.html">Learn the mathematics</a>
</div>
</div>
<section class="wrap reveal" id="s-here">
<div class="shead"><h2>Here & now</h2><div class="rule"></div><span class="k">this sky, this ground</span></div>
<div class="instruments">
<div class="card">
<div class="t"><span>where you stand</span><b>EARTH</b></div>
<svg id="miniGlobe" viewBox="0 0 300 300" width="272" height="272"></svg>
<div class="locline" id="locline">drag to spin · tap to relocate</div>
</div>
<div class="card">
<div class="t"><span>lagna — the rising sign, live</span><b>NORTH-INDIAN STYLE</b></div>
<svg id="lagnaMini" viewBox="0 0 300 240"></svg>
<div class="lagline" id="lagline"></div>
</div>
</div>
</section>
<section class="wrap reveal" id="s-today">
<div class="shead"><h2 id="todayH">Today, everywhere</h2><div class="rule"></div><span class="k">ten reckonings · one moment</span></div>
<div class="ribbon" id="ribbon"></div>
<div class="rotnote">the order of these cards rotates daily — no tradition owns the top slot.</div>
</section>
<section class="wrap reveal" id="s-up">
<div class="shead"><h2>Coming up</h2><div class="rule"></div><span class="k">computed festivals & eclipses</span></div>
<div class="events" id="events"></div>
</section>
<section class="wrap reveal" id="s-doors">
<div class="shead"><h2>Four instruments</h2><div class="rule"></div><span class="k">pick a door</span></div>
<div class="doors">
<a class="door" data-keep-theme href="pro.html"><span class="ic">🔭</span><span class="h">Observatory Pro</span>
<span class="p">The full instrument: geared orrery & true orbits, waveforms, spectra, dynamics, D1–D12 lagna charts you can drag planets across, the live sky with constellations, an eight-calendar almanac.</span>
<span class="go">enter →</span></a>
<a class="door" data-keep-theme href="learn.html"><span class="ic">📖</span><span class="h">The Mathematics</span>
<span class="p">Kepler to ayanāṁśa to Chebyshev ephemerides: interactive derivations, the schools and their differences, a history of this science, and how the same equations launch spacecraft.</span>
<span class="go">study →</span></a>
<a class="door" data-keep-theme href="tour.html"><span class="ic">🚀</span><span class="h">Interstellar Tour</span>
<span class="p">Plan a voyage to a real nearby star at a fraction of light-speed — with a warp-field view that goes properly Star-Trek as β→1 — and read your arrival in ten calendars.</span>
<span class="go">depart →</span></a>
<a class="door" data-keep-theme href="tests.html"><span class="ic">🧪</span><span class="h">Test Console</span>
<span class="p">Don't trust — verify. Fetch the public test-plan and run every anchor live in your browser: eclipse dates, the pradoṣa Dīpāvalī rule, calendar cross-checks.</span>
<span class="go">run →</span></a>
</div>
</section>
<footer>
<div class="wrap">
<div class="chips" id="chips">
<span class="chip"><b>✓</b> 120-assertion test suite</span>
<span class="chip"><b>✓</b> 4/4 eclipses of 2026, found by geometry</span>
<span class="chip"><b>✓</b> C core with byte-exact parity (6,590 checks)</span>
<span class="chip">offline-first · no trackers · no dependencies</span>
</div>
<div data-sharebar></div>
<div class="frow">
<span data-claude-badge></span>
<a href="https://github.com/project-ilm/chakra" target="_blank" rel="noopener">Source · GitHub</a>
<a href="https://github.com/project-ilm/chakra/releases" target="_blank" rel="noopener">Releases</a>
<a href="DISCLAIMER.md" target="_blank">Disclaimer</a>
<span class="chip">GPL-3.0-or-later · text CC BY-SA 4.0</span>
<span style="flex:1"></span>
<span data-themesel></span>
</div>
<div style="margin-top:12px">© 1993–2026 Abhishek Choudhary · CHAKRA is an instrument for study and heritage computation — not for navigation or muhūrta-critical use. Astrological outputs are cultural computations, not predictions.</div>
</div>
</footer>
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<div id="chakra-work"></div>
<div id="chakra-support"></div>
<script src="src/chakra-kernel.js"></script>
<script src="src/chakra-api.js"></script>
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Copyright (C) 1993-2026 Abhishek Choudhary. GPL-3.0-or-later. */
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</script>
<!-- showcase + support/cycler/learning layer: added by seed_chakra_plus.sh -->
<script src="js/chakra-civic.js"></script>
<script src="js/chakra-cycler.js"></script>
<script src="js/chakra-music.js"></script>
<script src="js/chakra-shell.js" defer></script>
<!-- kundali.html · mahabharata.html : added by seed_chakra_plus.sh -->
<script src="js/chakra-plus.js"></script>
<script src="src/chakra-site.js"></script>
<script>
(function(){
"use strict";
var C=window.Chakra;
var NS="http://www.w3.org/2000/svg";
function E(t,a){var e=document.createElementNS(NS,t);for(var k in a)e.setAttribute(k,a[k]);return e;}
function pad(n){return String(n).padStart(2,"0");}
var reduce=window.matchMedia&&window.matchMedia("(prefers-reduced-motion: reduce)").matches;
/* ── shared state: scrub offset + observer ───────────────────────────── */
var L={off:0, lat:17.385, lon:78.486};
var now=new Date();
function d0(){return C.dayNo(now.getUTCFullYear(),now.getUTCMonth()+1,now.getUTCDate(),
now.getUTCHours()+now.getUTCMinutes()/60+now.getUTCSeconds()/3600);}
function dCur(){return d0()+L.off;}
var evCache={};
function eventsOf(Y){if(!evCache[Y])evCache[Y]=C.annualEvents(Y);return evCache[Y];}
function refY(d){var g=C.jdn2greg(C.jdnOf(d));return g.Y+((g.M-1)*30.44+g.D)/365.25;}
/* ── hero instrument ─────────────────────────────────────────────────── */
function drawInstrument(d){
var svg=document.getElementById("astro");while(svg.firstChild)svg.removeChild(svg.firstChild);
var cx=230,cy=230,Rr=196,Rm=104;
var defs=E("defs",{});
defs.innerHTML='<radialGradient id="glit" cx="38%" cy="35%" r="75%">'+
'<stop offset="0%" stop-color="#f4f7ff"/><stop offset="55%" stop-color="#dfe6f6"/><stop offset="100%" stop-color="#aeb9d6"/></radialGradient>'+
'<radialGradient id="gdark" cx="50%" cy="50%" r="60%">'+
'<stop offset="0%" stop-color="#141a2c"/><stop offset="100%" stop-color="#0a0f1e"/></radialGradient>'+
'<radialGradient id="ghalo" cx="50%" cy="50%" r="50%">'+
'<stop offset="60%" stop-color="rgba(216,169,78,0)"/><stop offset="92%" stop-color="rgba(216,169,78,.14)"/><stop offset="100%" stop-color="rgba(216,169,78,0)"/></radialGradient>';
svg.appendChild(defs);
svg.appendChild(E("circle",{cx:cx,cy:cy,r:Rr+34,fill:"url(#ghalo)"}));
var g=E("g",{class:L.off===0?"ring-anim":""});
svg.appendChild(g);
g.appendChild(E("circle",{cx:cx,cy:cy,r:Rr,fill:"none",stroke:"rgba(120,140,190,.35)","stroke-width":1}));
g.appendChild(E("circle",{cx:cx,cy:cy,r:Rr-26,fill:"none",stroke:"rgba(120,140,190,.16)","stroke-width":1}));
for(var a=0;a<360;a+=5){
var maj=a%30===0, mid=a%10===0;
var r1=Rr, r2=Rr-(maj?14:mid?9:5);
var x1=cx+r1*Math.cos((a-90)*Math.PI/180),y1=cy+r1*Math.sin((a-90)*Math.PI/180);
var x2=cx+r2*Math.cos((a-90)*Math.PI/180),y2=cy+r2*Math.sin((a-90)*Math.PI/180);
g.appendChild(E("line",{x1:x1,y1:y1,x2:x2,y2:y2,stroke:maj?"rgba(160,180,220,.5)":"rgba(120,140,190,.25)","stroke-width":maj?1.2:0.7}));
}
var GL=["♈","♉","♊","♋","♌","♍","♎","♏","♐","♑","♒","♓"];
for(var s2=0;s2<12;s2++){
var lam=s2*30+15, ang=(-90-lam)*Math.PI/180;
var tx=cx+(Rr-38)*Math.cos(ang),ty=cy+(Rr-38)*Math.sin(ang);
var t=E("text",{x:tx,y:ty+5,fill:"rgba(160,180,220,.75)","font-size":15,"text-anchor":"middle","font-family":"var(--mono)"});
t.textContent=GL[s2];g.appendChild(t);
}
var gp=C.grahas(d);
var BODIES=[["Sun","☉","#e6b450",6],["Mercury","☿","#9fb0c0",3],["Venus","♀","#d08a5a",3.6],
["Mars","♂","#e0685a",3.4],["Jupiter","♃","#d9b24a",4.2],["Saturn","♄","#8a97b8",3.8]];
BODIES.forEach(function(b){
var ang=(-90-gp[b[0]])*Math.PI/180;
var bx=cx+Rr*Math.cos(ang),by=cy+Rr*Math.sin(ang);
g.appendChild(E("circle",{cx:bx,cy:by,r:b[3],fill:b[2],style:"filter:drop-shadow(0 0 6px "+b[2]+")"}));
var lx=cx+(Rr+16)*Math.cos(ang),ly=cy+(Rr+16)*Math.sin(ang);
var tl=E("text",{x:lx,y:ly+4,fill:b[2],"font-size":11,"text-anchor":"middle","font-family":"var(--mono)","fill-opacity":.9});
tl.textContent=b[1];g.appendChild(tl);
});
var mang=(-90-gp.Moon)*Math.PI/180;
g.appendChild(E("circle",{cx:cx+Rr*Math.cos(mang),cy:cy+Rr*Math.sin(mang),r:4,fill:"#e8ecf7",style:"filter:drop-shadow(0 0 6px #cdd6e0)"}));
var ph=C.phaseInfo(d);
svg.appendChild(E("circle",{cx:cx,cy:cy,r:Rm,fill:"url(#gdark)",stroke:"rgba(180,195,230,.25)","stroke-width":1}));
var k=Math.cos(ph.elong*Math.PI/180);
function lune(rightSide,kk){
var top=cy-Rm, bot=cy+Rm;
var sweepOuter=rightSide?1:0;
var rx=Math.abs(kk)*Rm;
var sweepInner=(kk>0? (rightSide?0:1) : (rightSide?1:0));
return "M "+cx+" "+top+" A "+Rm+" "+Rm+" 0 0 "+sweepOuter+" "+cx+" "+bot+
" A "+rx+" "+Rm+" 0 0 "+sweepInner+" "+cx+" "+top+" Z";
}
if(ph.illum>0.004)svg.appendChild(E("path",{d:lune(ph.waxing,k),fill:"url(#glit)"}));
[[-28,-30,26,.10],[18,-6,20,.09],[-6,34,16,.08],[34,26,12,.07]].forEach(function(m){
svg.appendChild(E("circle",{cx:cx+m[0],cy:cy+m[1],r:m[2],fill:"#8b96b8","fill-opacity":m[3]}));
});
svg.appendChild(E("circle",{cx:cx,cy:cy,r:Rm,fill:"none",stroke:"rgba(216,169,78,.28)","stroke-width":1}));
return {ph:ph,gp:gp};
}
/* ── mini location globe (coastlines + terminator; drag spin, tap set) ── */
var gl={lam0:70,phi0:18};
function orthoXY(lat,lon,cx,cy,R){var dl=(lon-gl.lam0)*Math.PI/180,la=lat*Math.PI/180,p0=gl.phi0*Math.PI/180;
var x=Math.cos(la)*Math.sin(dl), y=Math.cos(p0)*Math.sin(la)-Math.sin(p0)*Math.cos(la)*Math.cos(dl),
z=Math.sin(p0)*Math.sin(la)+Math.cos(p0)*Math.cos(la)*Math.cos(dl);
return z<0?null:[cx+R*x,cy-R*y];}
function drawGlobe(d){
var svg=document.getElementById("miniGlobe");while(svg.firstChild)svg.removeChild(svg.firstChild);
var cx=150,cy=150,R=136;
svg.appendChild(E("circle",{cx:cx,cy:cy,r:R,fill:"rgba(8,14,28,.92)",stroke:"rgba(70,199,214,.4)"}));
function path(pts,st){var pp="",pen=false;
for(var i=0;i<pts.length;i++){var p=pts[i]&&orthoXY(pts[i][0],pts[i][1],cx,cy,R);
if(!p){pen=false;continue;}pp+=(pen?"L":"M")+p[0].toFixed(1)+" "+p[1].toFixed(1)+" ";pen=true;}
if(pp){var attrs={d:pp,fill:"none"};for(var kk in st)attrs[kk]=st[kk];svg.appendChild(E("path",attrs));}}
/* faint navigation graticule only (NOT political borders — CHAKRA carries no border data) */
for(var la=-60;la<=60;la+=30){var gA=[];for(var lo=0;lo<=360;lo+=8)gA.push([la,lo]);path(gA,{stroke:"rgba(90,110,150,.07)","stroke-dasharray":"1 6"});}
for(var lo2=0;lo2<360;lo2+=60){var gB=[];for(var la2=-88;la2<=88;la2+=6)gB.push([la2,lo2]);path(gB,{stroke:"rgba(90,110,150,.06)","stroke-dasharray":"1 6"});}
/* natural shorelines only */
for(var r0=0;r0<C.COAST.length;r0++){var ring=C.COAST[r0],gC=[];
for(var i2=0;i2<ring.length;i2+=2)gC.push([ring[i2+1]/10,ring[i2]/10]);
path(gC,{stroke:"rgba(120,200,180,.42)","stroke-width":0.8});}
var ls=C.sunLon(d).lon,ee=C.obliq(d);
var Sd=function(x){return Math.sin(x*Math.PI/180);},Cd=function(x){return Math.cos(x*Math.PI/180);};
var aS=C.atan2d(Sd(ls)*Cd(ee),Cd(ls)), latS=Math.asin(Sd(ls)*Sd(ee))*180/Math.PI;
var lonS=((aS-C.gmst(d))%360+540)%360-180;
var n=[Cd(latS)*Cd(lonS),Cd(latS)*Sd(lonS),Sd(latS)];
var e1=[-Sd(lonS),Cd(lonS),0];
var e2=[n[1]*e1[2]-n[2]*e1[1],n[2]*e1[0]-n[0]*e1[2],n[0]*e1[1]-n[1]*e1[0]];
var term=[];for(var tt=0;tt<=360;tt+=4){var v=[e1[0]*Cd(tt)+e2[0]*Sd(tt),e1[1]*Cd(tt)+e2[1]*Sd(tt),e1[2]*Cd(tt)+e2[2]*Sd(tt)];
term.push([Math.asin(v[2])*180/Math.PI,C.atan2d(v[1],v[0])]);}
path(term,{stroke:"rgba(230,180,80,.6)","stroke-width":1.1,"stroke-dasharray":"4 3"});
var sp=orthoXY(latS,lonS,cx,cy,R);
if(sp)svg.appendChild(E("circle",{cx:sp[0],cy:sp[1],r:4,fill:"var(--sun)",style:"filter:drop-shadow(0 0 7px var(--sun))"}));
var mp=orthoXY(L.lat,L.lon,cx,cy,R);
if(mp){svg.appendChild(E("circle",{cx:mp[0],cy:mp[1],r:8,fill:"none",stroke:"var(--cy2)","stroke-width":1}));
svg.appendChild(E("circle",{cx:mp[0],cy:mp[1],r:3,fill:"var(--cy2)",style:"filter:drop-shadow(0 0 6px var(--cy))"}));}
}
function invOrtho(px,py,cx,cy,R){
var x=(px-cx)/R,y=(cy-py)/R,rho=Math.hypot(x,y);
if(rho>1)return null;
var c=Math.asin(Math.min(1,rho)),p0=gl.phi0*Math.PI/180;
var lat,lon;
if(rho<1e-9){lat=gl.phi0;lon=gl.lam0;}
else{
lat=Math.asin(Math.cos(c)*Math.sin(p0)+y*Math.sin(c)*Math.cos(p0)/rho)*180/Math.PI;
lon=gl.lam0+Math.atan2(x*Math.sin(c),rho*Math.cos(p0)*Math.cos(c)-y*Math.sin(p0)*Math.sin(c))*180/Math.PI;
}
return [lat,((lon%360)+540)%360-180];
}
/* ── mini North-Indian lagna chart ───────────────────────────────────── */
var NPOLY=[
[[150,10],[75,85],[150,160],[225,85]],
[[10,10],[150,10],[75,85]],
[[10,10],[75,85],[10,160]],
[[10,160],[75,85],[150,160],[75,235]],
[[10,310],[10,160],[75,235]],
[[10,310],[75,235],[150,310]],
[[150,310],[75,235],[150,160],[225,235]],
[[290,310],[150,310],[225,235]],
[[290,310],[225,235],[290,160]],
[[290,160],[225,235],[150,160],[225,85]],
[[290,10],[290,160],[225,85]],
[[290,10],[225,85],[150,10]]
];
function centroid(poly){var x=0,y=0;poly.forEach(function(p){x+=p[0];y+=p[1];});return [x/poly.length,y/poly.length];}
function drawLagna(d){
var svg=document.getElementById("lagnaMini");while(svg.firstChild)svg.removeChild(svg.firstChild);
var y=refY(d);
var g=C.grahas(d);
var ay=C.ayan(y);
var asc=C.rev(C.ascendant(d,L.lat,L.lon)-ay);
var ascSign=Math.floor(asc/30);
var inH={};for(var h=1;h<=12;h++)inH[h]=[];
["Sun","Moon","Mars","Mercury","Jupiter","Venus","Saturn","Rahu","Ketu"].forEach(function(nm){
var s=Math.floor(C.rev(g[nm]-ay)/30);var hh=((s-ascSign+12)%12)+1;inH[hh].push(nm);});
var sy=240/320, sx=1;
function pt(p){return (p[0]*sx).toFixed(1)+","+((p[1]-10)*sy+8).toFixed(1);}
NPOLY.forEach(function(poly,i){
var h=i+1;
svg.appendChild(E("polygon",{points:poly.map(pt).join(" "),
fill:h===1?"rgba(70,199,214,.08)":"rgba(5,9,18,.35)",
stroke:h===1?"var(--cy)":"rgba(90,110,150,.35)","stroke-width":h===1?1.4:1}));
var cxy=centroid(poly);var cx=cxy[0]*sx,cy=(cxy[1]-10)*sy+8;
var sn=(ascSign+h-1)%12+1;
var tn=E("text",{x:cx,y:cy-7,fill:"var(--mag)","font-size":10,"text-anchor":"middle","font-family":"var(--mono)","opacity":.8});
tn.textContent=sn;svg.appendChild(tn);
var row=inH[h].slice(0,4).map(function(nm){return C.GRAHA_GLYPH[nm];}).join(" ");
if(inH[h].length>4)row+=" +"+(inH[h].length-4);
if(row){var tg=E("text",{x:cx,y:cy+9,fill:"var(--paper)","font-size":11.5,"text-anchor":"middle","font-family":"var(--mono)"});
tg.textContent=row;svg.appendChild(tg);}
});
document.getElementById("lagline").innerHTML=
"lagna <b>"+C.RASHI[ascSign][0]+"</b> "+(asc%30).toFixed(1)+"° · sidereal (Lahiri) · <a data-keep-theme href='pro.html' style='color:var(--cy)'>full D1–D12 chart →</a>";
}
/* ── now-line, ribbon, events ────────────────────────────────────────── */
function drawNow(d,inst){
var ph=inst.ph, y=refY(d), pc=C.panchanga(d,y);
var g=C.jdn2greg(C.jdnOf(d));
var wd=["Sun","Mon","Tue","Wed","Thu","Fri","Sat"][(C.jdnOf(d)+1)%7];
var mo=["Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"][g.M-1];
document.getElementById("nowline").innerHTML=
'<span class="g">'+ph.name+"</span> · "+(ph.illum*100).toFixed(0)+"% lit · "+pc.tithi;
document.getElementById("nowsub").textContent=
wd+" "+g.D+" "+mo+" "+g.Y+" · "+pc.nak+" nakṣatra · "+pc.vara;
var sc=document.getElementById("scrub");
if(Math.abs(L.off)>0.04){
var dd=L.off>0?"+":"−";
sc.innerHTML="Δ "+dd+Math.abs(L.off).toFixed(Math.abs(L.off)<2?1:0)+" days from now"+
'<button id="backNow">⟲ now</button>';
document.getElementById("backNow").onclick=function(){L.off=0;renderAll();};
}else sc.textContent="";
document.getElementById("todayH").textContent=Math.abs(L.off)>0.04?"That day, everywhere":"Today, everywhere";
}
function drawRibbon(d){
var R=document.getElementById("ribbon");R.innerHTML="";
var y=refY(d), jdn=C.jdnOf(d), g=C.jdn2greg(jdn);
var cards=[];
function card(t,v,s){cards.push([t,v,s]);}
var wd=["Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"][(jdn+1)%7];
var mo=["January","February","March","April","May","June","July","August","September","October","November","December"][g.M-1];
card("Gregorian · civil",wd+", "+g.D+" "+mo+" "+g.Y,"ISO "+g.Y+"-"+pad(g.M)+"-"+pad(g.D));
var sv=C.samvInfo(d,g.Y);
card("Hindu · saṁvatsara",sv.name,"Śaka "+sv.saka+" · Vikrama "+sv.vikrama);
var hs=C.hijriSunni(jdn);
card("Hijrī · Sunni tabular",hs.d+" "+C.HIJRI_M[hs.m-1]+" "+hs.y+" AH","30-yr cycle, Kuwaiti leap set");
var hh=C.hijriShia(jdn);
card("Hijrī · Shia tabular",hh.d+" "+C.HIJRI_M[hh.m-1]+" "+hh.y+" AH","Ithnā-ʿAsharī leap set");
var sj=C.solarHijri(d,g.Y);
card("Solar Hijrī · Iran/Afghanistan",sj.d+" "+sj.m+" "+sj.y+" SH","Nowruz-anchored, computed equinox");
var hb=C.hebrew(jdn);
card("Hebrew · civil",hb.d+" "+hb.month+" "+hb.y+" AM",hb.leap?"leap year (Adar I+II)":"regular year");
var nk=C.nanakshahi(jdn);
card("Sikh · Nanakshahi",nk.d+" "+nk.month+" "+nk.y+" NS","New Year 1 Chet = 14 March");
card("Chinese · sexagenary",C.chineseYear(g.Y),C.tibetYear(g.Y).split("·")[0]);
var my=C.mayan(jdn);
card("Maya · Long Count",my.lc,my.tz+" · "+my.haab);
var pc=C.panchanga(d,y);
card("Pañcāṅga · this instant",pc.tithi.split(" (")[0]+" · "+pc.nak,pc.yoga+" yoga · "+pc.karana+" karaṇa");
if(window.ChakraPlus){try{var _m=window.ChakraPlus.hinduMonth(d);
card("Māsa · Hindu month",_m.masaFull+" "+_m.paksha,
_m.system+" · new moon "+_m.newMoon+(_m.adhika?" · adhika māsa":""));}catch(e){}}
var rot=((jdn%cards.length)+cards.length)%cards.length;
cards=cards.slice(rot).concat(cards.slice(0,rot));
cards.forEach(function(cv){
var c=document.createElement("div");c.className="cal";
c.innerHTML='<div class="t">'+cv[0]+'</div><div class="v">'+cv[1]+'</div>'+(cv[2]?'<div class="s">'+cv[2]+'</div>':"");
R.appendChild(c);
});
}
function drawEvents(d){
var box=document.getElementById("events");box.innerHTML="";
var jdn=C.jdnOf(d), g=C.jdn2greg(jdn);
var today=g.Y+"-"+pad(g.M)+"-"+pad(g.D);
var ev=eventsOf(g.Y).filter(function(e){return e.date>=today;});
if(ev.length<6)ev=ev.concat(eventsOf(g.Y+1));
ev.slice(0,6).forEach(function(e){
var a=document.createElement("a");a.className="ev";a.setAttribute("data-keep-theme","");
a.href="pro.html";
var dj=C.greg2jdn(+e.date.slice(0,4),+e.date.slice(5,7),+e.date.slice(8,10));
var days=dj-jdn;
a.innerHTML='<span class="d">'+e.date+'</span><span class="n">'+e.name+'</span>'+
'<span class="tr">'+e.tradition+'</span><span class="in">'+(days<=0?"today":"in "+days+" day"+(days===1?"":"s"))+'</span>';
box.appendChild(a);
});
}
function drawLoc(){
document.getElementById("locline").innerHTML=
L.lat.toFixed(2)+"°, "+L.lon.toFixed(2)+"° · drag to spin · <b style='color:var(--cy2)'>tap to relocate</b>";
}
/* ── the one render ──────────────────────────────────────────────────── */
var raf=0;
function renderAll(){
if(raf)return; raf=requestAnimationFrame(function(){raf=0;
var d=dCur();
var inst=drawInstrument(d);
drawNow(d,inst);
drawGlobe(d);
drawLagna(d);
drawRibbon(d);
drawEvents(d);
drawLoc();
});
}
renderAll();
/* ── interactions ────────────────────────────────────────────────────── */
(function(){ /* astrolabe scrub */
var el=document.getElementById("instr"),dr=null;
el.addEventListener("pointerdown",function(ev){dr={x:ev.clientX,off:L.off};try{el.setPointerCapture(ev.pointerId);}catch(e){}});
el.addEventListener("pointermove",function(ev){if(!dr)return;
L.off=dr.off+(ev.clientX-dr.x)/5; renderAll(); ev.preventDefault();});
var end=function(){dr=null;};
el.addEventListener("pointerup",end);el.addEventListener("pointercancel",end);
el.addEventListener("dblclick",function(){L.off=0;renderAll();});
})();
(function(){ /* globe spin / relocate */
var svg=document.getElementById("miniGlobe"),dr=null;
svg.addEventListener("pointerdown",function(ev){
var r=svg.getBoundingClientRect();
dr={x:ev.clientX,y:ev.clientY,lam:gl.lam0,phi:gl.phi0,moved:0,r:r};
try{svg.setPointerCapture(ev.pointerId);}catch(e){}});
svg.addEventListener("pointermove",function(ev){if(!dr)return;
var dx=ev.clientX-dr.x,dy=ev.clientY-dr.y;dr.moved=Math.max(dr.moved,Math.hypot(dx,dy));
gl.lam0=dr.lam-dx*0.5;gl.phi0=Math.max(-75,Math.min(75,dr.phi+dy*0.5));
renderAll();ev.preventDefault();});
svg.addEventListener("pointerup",function(ev){
if(dr&&dr.moved<5){
var r=dr.r;var px=(ev.clientX-r.left)*300/r.width,py=(ev.clientY-r.top)*300/r.height;
var ll=invOrtho(px,py,150,150,136);
if(ll){L.lat=ll[0];L.lon=ll[1];renderAll();}
}
dr=null;});
svg.addEventListener("pointercancel",function(){dr=null;});
})();
/* ── starfield + shooting stars ──────────────────────────────────────── */
(function(){
var cv=document.getElementById("stars"),ctx=cv.getContext("2d");
var stars=[],shots=[],W=0,H=0,dpr=Math.min(2,window.devicePixelRatio||1),nextShot=2500;
function size(){W=innerWidth;H=innerHeight;cv.width=W*dpr;cv.height=H*dpr;cv.style.width=W+"px";cv.style.height=H+"px";ctx.setTransform(dpr,0,0,dpr,0,0);}
size();addEventListener("resize",size);
var N=Math.min(170,Math.floor(W*H/9000));
for(var i=0;i<N;i++)stars.push({x:Math.random()*W,y:Math.random()*H,r:.4+Math.random()*1.1,p:Math.random()*6.28,s:.4+Math.random()*.9});
function frame(t){
ctx.clearRect(0,0,W,H);
for(var i=0;i<stars.length;i++){var st=stars[i];
var o=.35+.5*(.5+.5*Math.sin(t/1400*st.s+st.p));
ctx.globalAlpha=o;ctx.fillStyle="#cfe0ff";
ctx.beginPath();ctx.arc((st.x+t*0.0016*st.s)%W,st.y,st.r,0,6.283);ctx.fill();}
if(!reduce){
if(t>nextShot){nextShot=t+5000+Math.random()*8000;
shots.push({x:Math.random()*W*0.7,y:Math.random()*H*0.35,vx:5+Math.random()*4,vy:2+Math.random()*2,life:1});}
for(var j=shots.length-1;j>=0;j--){var sh=shots[j];
sh.x+=sh.vx;sh.y+=sh.vy;sh.life-=0.02;
if(sh.life<=0){shots.splice(j,1);continue;}
var grad=ctx.createLinearGradient(sh.x,sh.y,sh.x-sh.vx*9,sh.y-sh.vy*9);
grad.addColorStop(0,"rgba(230,240,255,"+(0.85*sh.life)+")");
grad.addColorStop(1,"rgba(230,240,255,0)");
ctx.strokeStyle=grad;ctx.lineWidth=1.4;ctx.globalAlpha=1;
ctx.beginPath();ctx.moveTo(sh.x,sh.y);ctx.lineTo(sh.x-sh.vx*9,sh.y-sh.vy*9);ctx.stroke();}
}
ctx.globalAlpha=1;
if(!reduce)requestAnimationFrame(frame);
}
if(reduce)frame(0);else requestAnimationFrame(frame);
})();
/* ── reveal on scroll ────────────────────────────────────────────────── */
(function(){
var els=document.querySelectorAll(".reveal");
if(!("IntersectionObserver" in window)){els.forEach(function(e){e.classList.add("on");});return;}
var io=new IntersectionObserver(function(en){en.forEach(function(x){if(x.isIntersecting){x.target.classList.add("on");io.unobserve(x.target);}});},{threshold:.12});
els.forEach(function(e){io.observe(e);});
})();
setInterval(function(){now=new Date();if(Math.abs(L.off)<0.04)renderAll();},120000);
})();
</script>
</body>
</html>