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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover, user-scalable=no">
<meta name="theme-color" content="#0a0a0a">
<title>Tempo — chess clock</title>
<link rel="manifest" href="manifest.webmanifest">
<link rel="icon" href="icons/icon-192.png" type="image/png">
<link rel="apple-touch-icon" href="icons/apple-touch-icon.png">
<meta name="mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
<meta name="apple-mobile-web-app-title" content="Tempo">
<style>
:root{
--bg:#0a0a0a; --ink:#e8e4d8;
--live:#1c1c1a; --idle:#070707;
--accent:#d8542f; --low:#c9a227; --flag:#7a1f12;
--hair:#262422;
--mono:"SFMono-Regular",ui-monospace,"Cascadia Mono","JetBrains Mono",Menlo,Consolas,monospace;
--disp:"DIN Condensed","Oswald","Bahnschrift","Arial Narrow",system-ui,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent;
user-select:none;-webkit-user-select:none;-webkit-touch-callout:none}
html,body{height:100%;overflow:hidden;background:var(--bg);color:var(--ink);font-family:var(--disp)}
#app{height:100dvh;display:flex;flex-direction:column}
.board{flex:1;display:flex;flex-direction:column;position:relative}
.half{flex:1;display:flex;align-items:center;justify-content:center;position:relative;
background:var(--idle);transition:background .12s ease;cursor:pointer;overflow:hidden}
.half.live{background:var(--live)}
.half.flagged{background:var(--flag)}
.half.lowtime .time{color:var(--low)}
.half.live::after{content:"";position:absolute;inset:0;border:2px solid var(--accent);
opacity:.9;pointer-events:none}
/* .face = the player's readable content; rotated to face them. Portrait:
bottom upright, top 180. Landscape: swap box dims + rotate 90 so the
rotated content fills the column exactly (no clipping). */
.face{position:absolute;inset:0;display:grid;grid-template-rows:auto 1fr auto auto;
align-items:center;justify-items:center;padding:16px 10px 14px}
.half.top .face{transform:rotate(180deg)}
.time{font-size:clamp(64px,18vw,200px);font-weight:600;letter-spacing:-.02em;
font-variant-numeric:tabular-nums;line-height:.9;font-family:var(--mono)}
.meta{grid-row:1;text-align:center;
font-size:13px;letter-spacing:.18em;text-transform:uppercase;color:#8a857a;font-weight:400}
.time{grid-row:2}
.moves{grid-row:4;text-align:center;
font-size:12px;letter-spacing:.15em;color:#6a655c}
.bar{height:54px;background:#000;display:flex;align-items:center;justify-content:center;
border-top:1px solid var(--hair);border-bottom:1px solid var(--hair);position:relative;z-index:5}
.bar button{background:none;border:none;color:#8a857a;font-family:var(--disp);
font-size:13px;letter-spacing:.16em;text-transform:uppercase;padding:0 22px;height:100%;cursor:pointer}
.bar button:active{color:var(--ink)}
.bar .sep{width:1px;height:22px;background:var(--hair)}
.bar .name{position:absolute;left:16px;font-size:12px;letter-spacing:.22em;color:#3a372f}
.bar .actions{display:flex;align-items:center;height:100%}
.bar.locked .actions{display:none}
.bar .lockpill{display:none;align-items:center;gap:8px;color:#4a463e;font-size:12px;
letter-spacing:.18em;text-transform:uppercase}
.bar.locked .lockpill{display:flex}
.bar .lockpill .dot{width:6px;height:6px;border-radius:50%;background:#4a463e}
.bar.arming .lockpill{color:var(--accent)}
.bar.arming .lockpill .dot{background:var(--accent)}
.nudge{grid-row:3;display:none;justify-content:center;gap:8px;margin-top:12px}
body.paused .nudge{display:flex}
.nudge button{width:30px;height:30px;border:1px solid var(--hair);background:#000;color:#8a857a;
border-radius:50%;font-size:16px;cursor:pointer;line-height:1}
/* Game over */
.over{position:absolute;inset:0;z-index:15;display:flex;align-items:center;justify-content:center;
background:rgba(0,0,0,.72);-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}
.over.hidden{display:none}
.over-card{text-align:center;padding:30px 36px;border:1px solid var(--hair);border-radius:4px;background:var(--bg)}
.over-flag{font-family:var(--disp);font-size:52px;font-weight:600;letter-spacing:.14em;color:var(--accent)}
.over-msg{font-family:var(--mono);font-size:12px;letter-spacing:.06em;color:#8a857a;margin-top:6px}
.over-btns{display:flex;gap:10px;margin-top:22px}
.over-btns button{flex:1;background:var(--idle);border:1px solid var(--hair);color:var(--ink);
font-family:var(--disp);font-size:14px;letter-spacing:.14em;text-transform:uppercase;
padding:14px 18px;border-radius:2px;cursor:pointer}
.over-btns #overRematch{background:var(--accent);color:#000;border-color:var(--accent)}
.over-btns button:active{filter:brightness(.9)}
/* Landscape face-off split — two side panels each rotated to its player.
Touch devices only (pointer:coarse): desktop keeps the stacked view. */
@media (orientation:landscape) and (pointer:coarse){
.board{flex-direction:row}
.half.top .face,.half.bottom .face{width:100vh;height:50vw;inset:auto;top:50%;left:50%;
transform-origin:center}
.half.top .face{transform:translate(-50%,-50%) rotate(90deg)}
.half.bottom .face{transform:translate(-50%,-50%) rotate(-90deg)}
.bar{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
height:auto;width:auto;border:1px solid var(--hair);border-radius:12px;
padding:6px 4px;background:rgba(0,0,0,.85);z-index:6}
.bar .actions{flex-direction:column;height:auto}
.bar button{height:auto;padding:11px 16px}
.bar .sep{width:20px;height:1px}
.bar .name{display:none}
.bar .lockpill{flex-direction:column;line-height:1.5;text-align:center}
}
.sheet{position:absolute;inset:0;background:var(--bg);z-index:20;display:flex;flex-direction:column;
padding:max(28px,env(safe-area-inset-top)) 24px 24px;overflow-y:auto}
.sheet.hidden{display:none}
.sheet h1{font-size:42px;font-weight:600;letter-spacing:.04em;margin-bottom:2px}
.sheet .sub{color:#6a655c;font-size:13px;letter-spacing:.16em;text-transform:uppercase;margin-bottom:22px}
.tabs{display:flex;gap:18px;border-bottom:1px solid var(--hair);margin-bottom:18px}
.tab{background:none;border:none;color:#6a655c;font-family:var(--disp);font-size:15px;
letter-spacing:.16em;text-transform:uppercase;padding:0 0 12px;cursor:pointer;
border-bottom:2px solid transparent;margin-bottom:-1px}
.tab.on{color:var(--ink);border-bottom-color:var(--accent)}
.pane{display:none}.pane.on{display:block}
.bucket{margin-bottom:18px}
.bucket h2{font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:#4a463e;
margin-bottom:10px;font-weight:400}
.row{display:grid;grid-template-columns:repeat(auto-fill,minmax(86px,1fr));gap:8px}
.preset{background:var(--idle);border:1px solid var(--hair);border-radius:2px;padding:12px 10px;
text-align:left;cursor:pointer;color:var(--ink);font-family:inherit}
.preset.on{border-color:var(--accent);background:#16110e}
.preset .p-name{font-size:18px;font-weight:600;letter-spacing:.01em;font-family:var(--mono)}
.preset .p-desc{font-size:10px;color:#6a655c;letter-spacing:.05em;margin-top:3px}
.preset.multi{grid-column:1/-1}
.preset.multi .p-name{font-family:var(--disp);letter-spacing:.03em}
.ctc{grid-column:1/-1;border:1px solid var(--hair);border-radius:2px;padding:12px;display:grid;gap:12px}
.ctc.on{border-color:var(--accent);background:#16110e}
.ctc .cline{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.ctc .fld{display:flex;align-items:center;gap:8px}
.ctc label{font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:#8a857a}
.ctc input[type=number]{width:66px;background:#000;border:1px solid var(--hair);color:var(--ink);
font-family:var(--mono);font-size:16px;padding:8px;border-radius:2px;text-align:center;-moz-appearance:textfield}
.ctc input::-webkit-outer-spin-button,.ctc input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}
.ctc .types{display:flex;gap:6px;flex-wrap:wrap}
.ctc .types button{background:#000;border:1px solid var(--hair);color:#8a857a;font-family:var(--disp);
font-size:12px;letter-spacing:.1em;text-transform:uppercase;padding:8px 10px;border-radius:2px;cursor:pointer}
.ctc .types button.on{border-color:var(--accent);color:var(--ink)}
.ctc .share{display:flex;align-items:center;gap:12px}
.ctc .share button{background:var(--idle);border:1px solid var(--hair);color:var(--ink);font-family:var(--disp);
font-size:12px;letter-spacing:.12em;text-transform:uppercase;padding:9px 13px;border-radius:2px;cursor:pointer}
.ctc .share button:active{border-color:var(--accent)}
.ctc .share .msg{font-family:var(--mono);font-size:11px;color:var(--accent);letter-spacing:.03em}
.themes{display:grid;grid-template-columns:repeat(auto-fill,minmax(96px,1fr));gap:10px;margin-bottom:24px}
.swatch{border:1px solid var(--hair);border-radius:3px;padding:0;cursor:pointer;overflow:hidden;
height:72px;position:relative;background:#000}
.swatch.on{border-color:var(--ink)}
.swatch .sw-top,.swatch .sw-bot{height:50%}
.swatch .sw-name{position:absolute;bottom:0;left:0;right:0;font-size:10px;letter-spacing:.1em;
text-transform:uppercase;text-align:center;padding:3px;background:rgba(0,0,0,.6)}
.custom{display:grid;gap:14px}
.crow{display:flex;align-items:center;justify-content:space-between;gap:12px}
.crow label{font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:#8a857a}
.crow input[type=color]{width:54px;height:34px;border:1px solid var(--hair);background:#000;border-radius:3px;cursor:pointer}
.rmt{display:grid;gap:16px;margin-bottom:20px}
.rmt p{font-size:13px;line-height:1.55;color:#8a857a;letter-spacing:.02em}
.rmt code{font-family:var(--mono);color:var(--ink);background:var(--idle);
border:1px solid var(--hair);border-radius:2px;padding:1px 5px;font-size:12px}
.dev{display:flex;flex-direction:column;gap:8px}
.dev button{background:var(--idle);border:1px solid var(--hair);color:var(--ink);
font-family:var(--disp);font-size:14px;letter-spacing:.14em;text-transform:uppercase;
border-radius:2px;padding:14px;cursor:pointer;text-align:left}
.dev button:active{border-color:var(--accent)}
.dev button[disabled]{opacity:.4;cursor:default}
.dev .st{font-family:var(--mono);font-size:11px;letter-spacing:.04em;text-transform:none}
.dev .st.ok{color:var(--accent)}
.proto{background:var(--idle);border:1px solid var(--hair);border-radius:2px;padding:14px;
font-family:var(--mono);font-size:12px;line-height:1.7;color:#8a857a;white-space:pre-wrap}
.proto b{color:var(--ink);font-weight:600}
.rmt .live-cmd{font-family:var(--mono);font-size:12px;color:#4a463e;min-height:16px;letter-spacing:.05em}
.rmt .live-cmd.hit{color:var(--accent)}
.bhead{display:flex;justify-content:space-between;align-items:baseline}
.bhead h2{font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:#4a463e;font-weight:400}
.bhead button{background:none;border:none;color:#4a463e;font-family:var(--disp);font-size:11px;
letter-spacing:.12em;text-transform:uppercase;cursor:pointer}
.bhead button:active{color:var(--ink)}
.binds{display:grid;gap:9px}
.brow{display:flex;align-items:center;gap:7px;flex-wrap:wrap}
.brow .blabel{font-size:11px;letter-spacing:.13em;text-transform:uppercase;color:#8a857a;min-width:92px}
.chip{font-family:var(--mono);font-size:11px;color:var(--ink);background:var(--idle);
border:1px solid var(--hair);border-radius:2px;padding:4px 8px;cursor:pointer}
.chip:active{border-color:var(--accent)}
.listen{background:#000;border:1px dashed var(--hair);color:#8a857a;font-family:var(--disp);font-size:11px;
letter-spacing:.1em;text-transform:uppercase;padding:5px 11px;border-radius:2px;cursor:pointer}
.brow.capturing .listen{border-color:var(--accent);color:var(--accent);border-style:solid}
.go{margin-top:auto;background:var(--accent);color:#000;border:none;border-radius:2px;
padding:20px;font-family:var(--disp);font-size:20px;font-weight:600;letter-spacing:.14em;
text-transform:uppercase;cursor:pointer}
.go:active{filter:brightness(.9)}
.hint{text-align:center;color:#4a463e;font-size:11px;letter-spacing:.1em;margin-top:12px;font-family:var(--mono)}
</style>
</head>
<body>
<div id="app">
<div class="board">
<div class="half top" data-player="1">
<div class="face">
<div class="meta" data-meta></div>
<div class="time">0:00</div>
<div class="nudge"><button data-nudge="-1">−</button><button data-nudge="1">+</button></div>
<div class="moves" data-moves></div>
</div>
</div>
<div class="bar locked" id="bar">
<span class="name">TEMPO</span>
<div class="lockpill"><span class="dot"></span><span data-locktext>hold to unlock</span></div>
<div class="actions">
<button data-act="pause">Pause</button>
<div class="sep"></div>
<button data-act="reset">Reset</button>
<div class="sep"></div>
<button data-act="lock">Lock</button>
</div>
</div>
<div class="half bottom" data-player="0">
<div class="face">
<div class="meta" data-meta></div>
<div class="time">0:00</div>
<div class="nudge"><button data-nudge="-1">−</button><button data-nudge="1">+</button></div>
<div class="moves" data-moves></div>
</div>
</div>
<div class="over hidden" id="over">
<div class="over-card">
<div class="over-flag">FLAG</div>
<div class="over-msg">out of time</div>
<div class="over-btns">
<button id="overRematch">Rematch</button>
<button id="overNew">New clock</button>
</div>
</div>
</div>
</div>
</div>
<div class="sheet" id="setup">
<h1>Tempo</h1>
<div class="sub">free · offline · yours</div>
<div class="tabs">
<button class="tab on" data-tab="time">Time</button>
<button class="tab" data-tab="theme">Theme</button>
<button class="tab" data-tab="remote">Remote</button>
</div>
<div class="pane on" data-pane="time" id="timePane"></div>
<div class="pane" data-pane="theme" id="themePane"></div>
<div class="pane" data-pane="remote" id="remotePane"></div>
<button class="go" id="go">Start</button>
<div class="hint">tap your side after each move · controls lock during play</div>
</div>
<script src="engine.js"></script>
<script>
const M=60000,S=1000;
const single=(base,inc,type='fischer')=>[{moves:null,base:base*M,incType:inc?type:'none',inc:inc*S}];
const PRESETS=[
{id:'b1+0',name:'1+0',desc:'bullet',bucket:'Bullet',stages:single(1,0)},
{id:'b2+1',name:'2+1',desc:'bullet',bucket:'Bullet',stages:single(2,1)},
{id:'z3+0',name:'3+0',desc:'blitz',bucket:'Blitz',stages:single(3,0)},
{id:'z3+2',name:'3+2',desc:'blitz',bucket:'Blitz',stages:single(3,2)},
{id:'z5+0',name:'5+0',desc:'blitz',bucket:'Blitz',stages:single(5,0)},
{id:'z5+3',name:'5+3',desc:'blitz',bucket:'Blitz',stages:single(5,3)},
{id:'r10+0',name:'10+0',desc:'rapid',bucket:'Rapid',stages:single(10,0)},
{id:'r10+5',name:'10+5',desc:'rapid',bucket:'Rapid',stages:single(10,5)},
{id:'r15+10',name:'15+10',desc:'rapid',bucket:'Rapid',stages:single(15,10)},
{id:'c30+0',name:'30+0',desc:'classical',bucket:'Classical',stages:single(30,0)},
{id:'c30+20',name:'30+20',desc:'classical',bucket:'Classical',stages:single(30,20)},
{id:'fide',name:'Classical FIDE',desc:'40 moves / 90 min, then +30 min · 30s increment',
bucket:'Tournament',multi:true,
stages:[{moves:40,base:90*M,incType:'fischer',inc:30*S},{moves:null,base:30*M,incType:'fischer',inc:30*S}]},
{id:'fide2',name:'FIDE Rapid Tiebreak',desc:'40/60, then 30 min + 30s',
bucket:'Tournament',multi:true,
stages:[{moves:40,base:60*M,incType:'fischer',inc:30*S},{moves:null,base:30*M,incType:'fischer',inc:30*S}]},
{id:'bron',name:'Bronstein 5|3',desc:'5 min · 3s Bronstein delay',
bucket:'Tournament',multi:true,stages:[{moves:null,base:5*M,incType:'bronstein',inc:3*S}]},
];
const BUCKETS=['Bullet','Blitz','Rapid','Classical','Tournament'];
const THEMES=[
{id:'noir',name:'Noir',bg:'#0a0a0a',accent:'#d8542f',ink:'#e8e4d8'},
{id:'slate',name:'Slate',bg:'#0e1418',accent:'#4ea1d3',ink:'#dce6ec'},
{id:'forest',name:'Forest',bg:'#0c1410',accent:'#5fa860',ink:'#dde8dd'},
{id:'plum',name:'Plum',bg:'#120c16',accent:'#b069d6',ink:'#e8dcef'},
{id:'ivory',name:'Ivory',bg:'#1a1814',accent:'#c79b3b',ink:'#efe7d6'},
{id:'mono',name:'Mono',bg:'#000000',accent:'#ffffff',ink:'#cccccc'},
];
let custom={bg:'#0a0a0a',accent:'#d8542f',ink:'#e8e4d8'};
let activeTheme='noir';
function applyTheme(t){
const root=document.documentElement.style;
root.setProperty('--bg',t.bg);
root.setProperty('--accent',t.accent);
root.setProperty('--ink',t.ink);
root.setProperty('--idle',shade(t.bg,-0.4));
root.setProperty('--live',shade(t.bg,0.5));
root.setProperty('--hair',shade(t.bg,1.4));
document.querySelector('meta[name=theme-color]').setAttribute('content',t.bg);
}
function shade(hex,amt){
let n=parseInt(hex.slice(1),16),r=(n>>16)&255,g=(n>>8)&255,b=n&255;
const f=v=> amt<0 ? Math.round(v*(1+amt)) : Math.round(v+(255-v)*Math.min(amt,1)*0.12+amt*3);
const c=v=>Math.max(0,Math.min(255,f(v)));
return '#'+[c(r),c(g),c(b)].map(x=>x.toString(16).padStart(2,'0')).join('');
}
const $=s=>document.querySelector(s);
const halves=[...document.querySelectorAll('.half')];
const bar=$('#bar');
let state=null,raf=null,wakeLock=null,prevFlag=false,prevLow=[false,false],chosen=PRESETS.find(p=>p.id==='z5+3');
let ac=null;
function beep(freq,dur){
try{
ac=ac||new (window.AudioContext||window.webkitAudioContext)();
const o=ac.createOscillator(),g=ac.createGain();
o.type='square';o.frequency.value=freq;o.connect(g);g.connect(ac.destination);
g.gain.setValueAtTime(0.0001,ac.currentTime);
g.gain.exponentialRampToValueAtTime(0.25,ac.currentTime+0.01);
g.gain.exponentialRampToValueAtTime(0.0001,ac.currentTime+dur);
o.start();o.stop(ac.currentTime+dur);
}catch(_){}
}
function fmt(ms){
if(ms<0)ms=0; const t=Math.ceil(ms/1000);
const h=Math.floor(t/3600),m=Math.floor((t%3600)/60),s=t%60;
if(h>0)return `${h}:${String(m).padStart(2,'0')}:${String(s).padStart(2,'0')}`;
if(ms<20000)return `${m}:${String(s).padStart(2,'0')}.${Math.floor((ms%1000)/100)}`;
return `${m}:${String(s).padStart(2,'0')}`;
}
function labelInc(st){
if(st.incType==='fischer')return `+${st.inc/1000}s`;
if(st.incType==='bronstein')return `bronstein ${st.inc/1000}s`;
if(st.incType==='delay')return `delay ${st.inc/1000}s`;
return 'sudden death';
}
function render(){
const v=TempoEngine.peek(state,performance.now());
for(let i=0;i<2;i++){
const el=halves.find(h=>+h.dataset.player===i), sv=v.sides[i];
el.querySelector('.time').textContent=fmt(sv.remaining);
el.classList.toggle('live',v.active===i&&v.running);
el.classList.toggle('flagged',sv.flagged);
const low=sv.remaining<20000&&sv.remaining>0;
el.classList.toggle('lowtime',low);
// single warning tick when the running side first drops under 10s
const warn=v.active===i&&v.running&&sv.remaining<10000&&sv.remaining>0;
if(warn&&!prevLow[i])beep(880,.09);
prevLow[i]=warn;
const st=sv.stage;
el.querySelector('[data-moves]').textContent= sv.flagged?'FLAG'
: st.moves?`${sv.movesInStage}/${st.moves}`
:`${sv.totalMoves} move${sv.totalMoves===1?'':'s'}`;
el.querySelector('[data-meta]').textContent=
(state.config.stages.length>1?`stage ${sv.stageIdx+1} · `:'')+labelInc(st);
}
document.body.classList.toggle('paused',state.started&&!state.running&&!v.flaggedAny);
if(v.flaggedAny&&!prevFlag){beep(220,.5);setTimeout(()=>beep(196,.7),160);}
prevFlag=v.flaggedAny;
$('#over').classList.toggle('hidden',!(v.flaggedAny&&state.started));
if(v.flaggedAny)releaseWake();
raf=requestAnimationFrame(render);
}
function input_press(player){
if(!state)return;
const wasStarted=state.started;
TempoEngine.press(state,player,performance.now());
if(!wasStarted){ requestWake(); bar.classList.add('locked'); }
navigator.vibrate&&navigator.vibrate(8);
}
halves.forEach(h=>{
h.addEventListener('pointerdown',e=>{
if(e.target.dataset.nudge!==undefined){
TempoEngine.adjustMoves(state,+h.dataset.player,+e.target.dataset.nudge);
e.stopPropagation();return;
}
input_press(+h.dataset.player);
});
});
addEventListener('keydown',e=>{
if(e.repeat||e.target.tagName==='INPUT')return;
if(capturing){ e.preventDefault(); if(e.code!=='Escape')addBind(capturing,{t:'key',c:e.code}); capturing=null; renderBinds(); return; }
const a=lookup['key:'+e.code];
if(a){ e.preventDefault(); fireAction(a,keyName(e.code)); }
});
let holdTimer=null;
bar.addEventListener('pointerdown',e=>{
if(!bar.classList.contains('locked'))return;
if(!state||!state.started)return;
bar.classList.add('arming');
navigator.vibrate&&navigator.vibrate(15);
holdTimer=setTimeout(()=>{
bar.classList.remove('locked','arming');
navigator.vibrate&&navigator.vibrate([10,40,10]);
},650);
});
['pointerup','pointerleave','pointercancel'].forEach(ev=>
bar.addEventListener(ev,()=>{clearTimeout(holdTimer);bar.classList.remove('arming');}));
bar.addEventListener('click',e=>{
const act=e.target.dataset.act;
if(!act||bar.classList.contains('locked'))return;
if(act==='pause')togglePause();
if(act==='lock')bar.classList.add('locked');
if(act==='reset'){stop();$('#setup').classList.remove('hidden');}
});
function togglePause(){
if(!state||!state.started)return;
const now=performance.now();
if(state.running){TempoEngine.pause(state,now);releaseWake();}
else{TempoEngine.resume(state,now);requestWake();}
}
async function requestWake(){try{if('wakeLock'in navigator&&!wakeLock)wakeLock=await navigator.wakeLock.request('screen');}catch(_){}}
function releaseWake(){if(wakeLock){wakeLock.release().catch(()=>{});wakeLock=null;}}
document.addEventListener('visibilitychange',()=>{if(document.visibilityState==='visible'&&state?.running)requestWake();});
function start(){
state=TempoEngine.create(chosen);
prevFlag=false;prevLow=[false,false];
bar.classList.add('locked');
$('#over').classList.add('hidden');
$('#setup').classList.add('hidden');
cancelAnimationFrame(raf);render();
}
function stop(){cancelAnimationFrame(raf);releaseWake();state=null;
$('#over').classList.add('hidden');
halves.forEach(h=>h.classList.remove('live','flagged','lowtime'));bar.classList.add('locked');}
document.querySelectorAll('.tab').forEach(t=>t.onclick=()=>{
document.querySelectorAll('.tab').forEach(x=>x.classList.toggle('on',x===t));
document.querySelectorAll('.pane').forEach(p=>p.classList.toggle('on',p.dataset.pane===t.dataset.tab));
});
function buildTime(){
const pane=$('#timePane');pane.innerHTML='';
BUCKETS.forEach(bk=>{
const items=PRESETS.filter(p=>p.bucket===bk);if(!items.length)return;
const wrap=document.createElement('div');wrap.className='bucket';
wrap.innerHTML=`<h2>${bk}</h2>`;
const row=document.createElement('div');row.className='row';
items.forEach(p=>{
const b=document.createElement('button');
b.className='preset'+(p.multi?' multi':'')+(p.id===chosen.id?' on':'');
b.innerHTML=`<div class="p-name">${p.name}</div><div class="p-desc">${p.desc}</div>`;
b.onclick=()=>{chosen=p;buildTime();};
row.appendChild(b);
});
wrap.appendChild(row);pane.appendChild(wrap);
});
buildCustom(pane);
}
// Synthetic time controls: user-built and link-shared clocks look like presets.
let customTC={base:5,inc:2,type:'fischer'};
function tcFromCustom(){
const t=customTC, incType=t.inc>0?t.type:'none';
return {id:'custom',name:`${t.base}+${t.inc}`,
desc:incType==='none'?'sudden death':incType,
stages:[{moves:null,base:t.base*M,incType,inc:t.inc*S}]};
}
function buildCustom(pane){
const shared=chosen.id==='shared', on=chosen.id==='custom'||shared;
const wrap=document.createElement('div');wrap.className='bucket';
wrap.innerHTML=`<h2>${shared?'Shared · '+chosen.name:'Custom'}</h2>`;
const card=document.createElement('div');card.className='ctc'+(on?' on':'');
const T=[['fischer','Fischer'],['bronstein','Bronstein'],['delay','Delay'],['none','Sudden death']];
card.innerHTML=`
<div class="cline">
<div class="fld"><label>Min</label><input type="number" id="ctcBase" min="0" max="600" value="${customTC.base}"></div>
<div class="fld"><label>Inc s</label><input type="number" id="ctcInc" min="0" max="180" value="${customTC.inc}"></div>
</div>
<div class="types" id="ctcTypes">
${T.map(([v,l])=>`<button data-t="${v}" class="${customTC.type===v?'on':''}">${l}</button>`).join('')}
</div>
<div class="share">
<button id="ctcShare">Share link</button>
<span class="msg" id="ctcMsg"></span>
</div>`;
wrap.appendChild(card);pane.appendChild(wrap);
const apply=()=>{
customTC.base=Math.min(600,Math.max(0,+$('#ctcBase').value||0));
customTC.inc=Math.min(180,Math.max(0,+$('#ctcInc').value||0));
chosen=tcFromCustom();buildTime();
};
$('#ctcBase').addEventListener('change',apply);
$('#ctcInc').addEventListener('change',apply);
$('#ctcTypes').querySelectorAll('button').forEach(b=>
b.onclick=()=>{customTC.type=b.dataset.t;chosen=tcFromCustom();buildTime();});
$('#ctcShare').onclick=shareTC;
}
// Deep link: the whole time control rides in the URL hash — offline, no server.
function encodeTC(tc){ return btoa(JSON.stringify({n:tc.name,s:tc.stages})); }
function decodeTC(str){
try{ const o=JSON.parse(atob(str));
if(!Array.isArray(o.s)||!o.s.length)return null;
return {id:'shared',name:o.n||'Shared clock',desc:'shared clock',
multi:o.s.length>1,stages:o.s};
}catch(_){ return null; }
}
function shareTC(){
const url=location.origin+location.pathname+'#tc='+encodeTC(chosen);
try{ history.replaceState(null,'','#tc='+encodeTC(chosen)); }catch(_){}
const msg=t=>{const m=$('#ctcMsg');if(!m)return;m.textContent=t;clearTimeout(m._t);m._t=setTimeout(()=>m.textContent='',2600);};
if(navigator.clipboard&&location.protocol!=='file:')
navigator.clipboard.writeText(url).then(()=>msg('link copied')).catch(()=>msg('in address bar ↑'));
else msg('in address bar ↑');
}
function loadHashTC(){
const m=location.hash.match(/tc=([^&]+)/);
if(!m)return;
const tc=decodeTC(m[1]);
if(tc)chosen=tc;
}
function buildTheme(){
const pane=$('#themePane');pane.innerHTML='';
const grid=document.createElement('div');grid.className='themes';
THEMES.forEach(t=>{
const sw=document.createElement('button');
sw.className='swatch'+(activeTheme===t.id?' on':'');
sw.innerHTML=`<div class="sw-top" style="background:${t.bg}"></div>
<div class="sw-bot" style="background:${t.accent}"></div>
<div class="sw-name">${t.name}</div>`;
sw.onclick=()=>{activeTheme=t.id;applyTheme(t);buildTheme();};
grid.appendChild(sw);
});
pane.appendChild(grid);
const c=document.createElement('div');c.className='custom';
c.innerHTML=`
<h2 style="font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:#4a463e">Custom</h2>
<div class="crow"><label>Background</label><input type="color" id="cBg" value="${custom.bg}"></div>
<div class="crow"><label>Accent</label><input type="color" id="cAccent" value="${custom.accent}"></div>
<div class="crow"><label>Text</label><input type="color" id="cInk" value="${custom.ink}"></div>`;
pane.appendChild(c);
const live=()=>{custom={bg:$('#cBg').value,accent:$('#cAccent').value,ink:$('#cInk').value};
activeTheme='custom';applyTheme(custom);
document.querySelectorAll('.swatch').forEach(s=>s.classList.remove('on'));};
['cBg','cAccent','cInk'].forEach(id=>$('#'+id).addEventListener('input',live));
}
/* ---- Remote control layer -------------------------------------------
The public surface real hardware / other devices drive Tempo through.
Pure intents: it never touches engine internals, only the same calls
the touchscreen makes. Exposed as window.Tempo.control. -------------- */
function flashCmd(txt){
const el=$('#liveCmd');if(!el)return;
el.textContent='◆ '+txt;el.classList.add('hit');
clearTimeout(el._t);el._t=setTimeout(()=>el.classList.remove('hit'),220);
}
const Remote={
press(player,src){ if(!state){start();} input_press(player); flashCmd((src||'press')+' → '+(player?'top':'bottom')); },
left(src){ this.press(0,src||'left'); },
right(src){ this.press(1,src||'right'); },
pause(){ if(state?.started&&state.running){togglePause();flashCmd('pause');} },
resume(){ if(state?.started&&!state.running){togglePause();flashCmd('resume');} },
toggle(src){ if(!state?.started)return; togglePause(); flashCmd((src||'toggle')+' → '+(state.running?'resume':'pause')); },
start(){ if(!state){start();flashCmd('start');} },
reset(){ stop();$('#setup').classList.remove('hidden');flashCmd('reset'); },
status(){ return state?TempoEngine.peek(state,performance.now()):null; },
};
window.Tempo={engine:TempoEngine,control:Remote,get state(){return state;}};
/* Byte protocol shared by Serial + Bluetooth (Nordic UART). One char/line. */
function feedCmd(raw,via){
const c=(raw||'').trim().toUpperCase();
if(!c)return;
if(c==='L')Remote.left(via);
else if(c==='R')Remote.right(via);
else if(c==='P')Remote.toggle(via);
else if(c==='S')Remote.start();
else if(c==='X')Remote.reset();
}
/* Rebindable inputs — bind ANY key or gamepad button to an action.
Everything (keyboard, Xbox/PS4 pad, dance mat, wheel, MIDI-as-HID) lands
here. Persisted locally; no network, works fully offline. */
const DEFAULT_BINDS={
bottom:[{t:'key',c:'KeyL'},{t:'pad',c:4},{t:'pad',c:0}], // L · LB · A/✕
top: [{t:'key',c:'KeyA'},{t:'pad',c:5},{t:'pad',c:1}], // A · RB · B/○
pause: [{t:'key',c:'Space'},{t:'pad',c:9},{t:'pad',c:8}],// Space · Menu · Back
};
const clone=o=>JSON.parse(JSON.stringify(o));
let binds=loadBinds(), lookup=buildLookup(), capturing=null;
function loadBinds(){ try{const j=JSON.parse(localStorage.getItem('tempo.binds'));return j&&j.bottom&&j.top&&j.pause?j:clone(DEFAULT_BINDS);}catch(_){return clone(DEFAULT_BINDS);} }
function saveBinds(){ try{localStorage.setItem('tempo.binds',JSON.stringify(binds));}catch(_){} lookup=buildLookup(); }
// pad triggers carry g = gamepad index (undefined = any pad) so two players
// on two controllers are distinct. key = 'pad:<g|*>:<button>' or 'key:<code>'.
function padKey(g,i){ return 'pad:'+(g==null?'*':g)+':'+i; }
function buildLookup(){ const m={}; for(const a of ['bottom','top','pause']) for(const b of binds[a])
m[b.t==='pad'?padKey(b.g,b.c):'key:'+b.c]=a; return m; }
function addBind(a,b){ // a trigger maps to exactly one action
for(const k of ['bottom','top','pause']) binds[k]=binds[k].filter(x=>!(x.t===b.t&&x.c===b.c&&x.g===b.g));
binds[a].push(b); saveBinds();
}
function fireAction(a,src){ if(a==='bottom')Remote.left(src); else if(a==='top')Remote.right(src); else if(a==='pause')Remote.toggle(src); }
function keyName(code){ return code.replace(/^Key/,'').replace(/^Digit/,'#').replace(/^Arrow/,'').replace('Space','␣'); }
function bindLabel(b){ return b.t==='key'?keyName(b.c):(b.g==null?'':'P'+(b.g+1)+' ')+'btn '+b.c; }
/* Gamepad poll — edge-triggered so a held button fires once. Also the
capture source when binding a controller button. */
const padPrev={};
function pollPads(){
const pads=navigator.getGamepads?navigator.getGamepads():[];
for(const p of pads){ if(!p)continue;
p.buttons.forEach((b,i)=>{
const k=p.index+':'+i,down=b.pressed;
if(down&&!padPrev[k])onPad(p.index,i);
padPrev[k]=down;
});
}
requestAnimationFrame(pollPads);
}
function onPad(g,i){
if(capturing){ addBind(capturing,{t:'pad',c:i,g}); capturing=null; renderBinds(); return; }
const a=lookup[padKey(g,i)]||lookup[padKey(null,i)]; // exact device, else any-pad default
if(a)fireAction(a,'P'+(g+1)+' btn '+i);
}
requestAnimationFrame(pollPads);
function renderBinds(){
const box=$('#bindsBox'); if(!box)return;
const A=[['bottom','Bottom side'],['top','Top side'],['pause','Pause']];
box.innerHTML=A.map(([a,l])=>`
<div class="brow${capturing===a?' capturing':''}">
<span class="blabel">${l}</span>
${binds[a].map((b,i)=>`<button class="chip" data-a="${a}" data-i="${i}">${bindLabel(b)} ✕</button>`).join('')}
<button class="listen" data-a="${a}">${capturing===a?'press any input…':'＋ bind'}</button>
</div>`).join('');
box.querySelectorAll('.listen').forEach(b=>b.onclick=()=>{
capturing=capturing===b.dataset.a?null:b.dataset.a; renderBinds(); b.blur();
});
box.querySelectorAll('.chip').forEach(c=>c.onclick=()=>{
binds[c.dataset.a].splice(+c.dataset.i,1); saveBinds(); renderBinds();
});
}
/* Web Serial — USB micro (ESP32/Arduino) writes L/R/P/S/X lines. */
let serialPort=null;
async function connectSerial(){
const st=$('#serialSt');
if(!('serial'in navigator)){st.textContent='not supported in this browser';return;}
try{
serialPort=await navigator.serial.requestPort();
await serialPort.open({baudRate:115200});
st.textContent='connected · 115200';st.classList.add('ok');
const dec=new TextDecoderStream();
serialPort.readable.pipeTo(dec.writable).catch(()=>{});
const reader=dec.readable.getReader();let buf='';
for(;;){ const {value,done}=await reader.read(); if(done)break;
buf+=value;let nl;
while((nl=buf.search(/[\r\n]/))>=0){ feedCmd(buf.slice(0,nl),'serial'); buf=buf.slice(nl+1); }
}
}catch(_){ st.textContent='connection failed / cancelled';st.classList.remove('ok'); }
}
/* Web Bluetooth — Nordic UART Service, notify on TX characteristic. */
const NUS='6e400001-b5a3-f393-e0a9-e50e24dcca9e';
const NUS_TX='6e400003-b5a3-f393-e0a9-e50e24dcca9e';
async function connectBLE(){
const st=$('#bleSt');
if(!('bluetooth'in navigator)){st.textContent='not supported in this browser';return;}
try{
const dev=await navigator.bluetooth.requestDevice({filters:[{services:[NUS]}]});
const gatt=await dev.gatt.connect();
const tx=await (await gatt.getPrimaryService(NUS)).getCharacteristic(NUS_TX);
await tx.startNotifications();
const dec=new TextDecoder();
tx.addEventListener('characteristicvaluechanged',e=>feedCmd(dec.decode(e.target.value),'ble'));
dev.addEventListener('gattserverdisconnected',()=>{st.textContent='disconnected';st.classList.remove('ok');});
st.textContent='connected · '+(dev.name||'device');st.classList.add('ok');
}catch(_){ st.textContent='connection failed / cancelled';st.classList.remove('ok'); }
}
function buildRemote(){
const pane=$('#remotePane');
const serial='serial'in navigator, ble='bluetooth'in navigator;
pane.innerHTML=`
<div class="rmt">
<p>Tempo's engine is a public API. Any input — a keyboard, an Xbox or
PS4 controller, a $3 microcontroller with two buttons — can drive the
exact same clock the screen taps do. Pair a controller and hit the
bumpers. Nothing is stored; commands map straight to moves.</p>
<div class="live-cmd" id="liveCmd">waiting for input…</div>
<div class="bhead"><h2>Bind anything</h2><button id="bindReset">reset</button></div>
<div class="binds" id="bindsBox"></div>
<p>Click <b>bind</b>, then press a key or any controller button — a
gamepad, a racing wheel, a dance mat, anything the browser sees as a
pad. Two players can each bind a button on their own controller. Tap a
chip to remove it. Saved on this device.</p>
<div class="dev">
<button id="btnSerial" ${serial?'':'disabled'}>
Connect USB device
<div class="st" id="serialSt">${serial?'Web Serial ready':'Web Serial unavailable'}</div>
</button>
<button id="btnBle" ${ble?'':'disabled'}>
Connect Bluetooth device
<div class="st" id="bleSt">${ble?'Nordic UART ready':'Web Bluetooth unavailable'}</div>
</button>
</div>
<div class="proto"><b>PROTOCOL</b> one char per line, over any transport
<b>L</b> press bottom side <b>P</b> pause / resume
<b>R</b> press top side <b>S</b> start
<b>X</b> reset to setup
<b>KEYBOARD</b> L · A · Space
<b>GAMEPAD</b> bumpers L/R (or A/B) · Menu = pause
<b>BLE UUID</b> 6e400001-…-24dcca9e (NUS)</div>
<p>Or script it yourself: <code>Tempo.control.left()</code>,
<code>Tempo.control.toggle()</code>, <code>Tempo.control.status()</code>.</p>
</div>`;
if(serial)$('#btnSerial').onclick=connectSerial;
if(ble)$('#btnBle').onclick=connectBLE;
$('#bindReset').onclick=()=>{binds=clone(DEFAULT_BINDS);saveBinds();renderBinds();};
renderBinds();
}
$('#go').onclick=start;
$('#overRematch').onclick=()=>start();
$('#overNew').onclick=()=>Remote.reset();
loadHashTC();
buildTime();buildTheme();buildRemote();
applyTheme(THEMES[0]);
if('serviceWorker'in navigator){
addEventListener('load',()=>navigator.serviceWorker.register('service-worker.js').catch(()=>{}));
}
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