:root{
  --paper:#E9EEF0; --paper2:#DCE4E8; --grid:#C9D6DC; --ink:#16202B; --muted:#5B6873;
  --line:#1F4FD8; --boost:#E0482A; --bounce:#169A66; --fixed:#4A5763; --hazard:#C21F4B;
  --gold:#E7A417; --portal:#7B3FE4; --panel:#F7FAFB; --shadow:0 6px 24px rgba(22,32,43,.14);
  --disp:"Big Shoulders Display","Arial Narrow",Impact,sans-serif;
  --body:"Figtree",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,Consolas,monospace;
  color-scheme:light;
}
html,body{height:100%}
body{background:var(--paper);color:var(--ink);font-family:var(--body);overflow:hidden;touch-action:none;-webkit-user-select:none;user-select:none}
button{font:inherit;color:inherit;cursor:pointer}
button:focus-visible{outline:3px solid var(--line);outline-offset:2px}
#stage{position:fixed;inset:0;display:block;width:100%;height:100%}

/* HUD */
.hud{position:fixed;left:0;right:0;top:0;padding:calc(env(safe-area-inset-top,0px) + 10px) 16px 0;display:flex;gap:10px;align-items:flex-start;justify-content:space-between;pointer-events:none}
.hud>*{pointer-events:auto}
.plate{background:var(--panel);border:1.5px solid var(--ink);border-radius:4px;box-shadow:3px 3px 0 var(--ink)}
.lvl{padding:6px 12px 7px;min-width:0}
.lvl .no{font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:var(--muted);text-transform:uppercase}
.lvl .nm{font-family:var(--disp);font-weight:800;font-size:24px;line-height:1;letter-spacing:.01em;text-transform:uppercase;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:46vw}
.meters{display:flex;gap:8px;align-items:stretch;flex-wrap:wrap;justify-content:flex-end}
.meter{padding:6px 10px;font-family:var(--mono);font-size:12px;display:flex;flex-direction:column;gap:4px;min-width:118px}
.meter b{font-weight:600;font-variant-numeric:tabular-nums}
.meter .spd{font-family:var(--disp);font-weight:800;font-size:22px;line-height:1;min-width:4.6ch}
.bar{height:6px;background:var(--paper2);border-radius:3px;overflow:hidden}
.bar i{display:block;height:100%;width:0;background:var(--line);transition:width .12s}
.bar i.warn{background:var(--boost)}
.iconbtn{width:42px;height:42px;display:grid;place-items:center;background:var(--panel);border:1.5px solid var(--ink);border-radius:4px;box-shadow:3px 3px 0 var(--ink)}
.iconbtn:active{transform:translate(2px,2px);box-shadow:1px 1px 0 var(--ink)}
.iconbtn svg{width:20px;height:20px}

.tip{position:fixed;left:50%;transform:translateX(-50%);top:calc(env(safe-area-inset-top,0px) + 74px);max-width:min(560px,calc(100% - 32px));font-size:14px;line-height:1.4;padding:8px 14px;background:var(--ink);color:var(--paper);border-radius:4px;text-align:center;pointer-events:none;transition:opacity .4s}

/* toolbar */
.tools{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(env(safe-area-inset-bottom,0px) + 14px);display:flex;gap:6px;padding:6px;align-items:center;max-width:calc(100% - 32px);overflow-x:auto}
.tool{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;width:54px;height:52px;border:1.5px solid transparent;border-radius:3px;background:transparent;flex:none}
.tool svg{width:22px;height:22px}
.tool span{font-family:var(--mono);font-size:9.5px;letter-spacing:.06em;text-transform:uppercase}
.tool kbd{position:absolute;top:2px;right:4px;font-family:var(--mono);font-size:9px;color:var(--muted)}
.tool:hover{background:var(--paper)}
.tool[aria-pressed="true"]{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.tool[aria-pressed="true"] kbd{color:var(--grid)}
.tool:disabled{opacity:.3;cursor:not-allowed}
.sep{width:1.5px;align-self:stretch;background:var(--grid);margin:4px 2px;flex:none}
.play{width:78px;height:52px;border-radius:3px;border:1.5px solid var(--ink);background:var(--line);color:#fff;display:flex;align-items:center;justify-content:center;gap:6px;font-family:var(--disp);font-weight:800;font-size:20px;letter-spacing:.04em;text-transform:uppercase;flex:none}
.play.stop{background:var(--boost)}
.play svg{width:18px;height:18px}
.sw{width:10px;height:10px;border-radius:50%;display:inline-block}

/* overlays */
.screen{position:fixed;inset:0;overflow-y:auto;background:var(--paper);background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:32px 32px;background-position:-1px -1px}
.menu{max-width:980px;margin:0 auto;padding-inline:16px;padding-block:calc(env(safe-area-inset-top,0px) + 28px) 48px}
.brand{display:flex;flex-wrap:wrap;align-items:flex-end;gap:12px 28px;margin-bottom:26px}
.brand h1{font-family:var(--disp);font-weight:900;font-size:clamp(64px,13vw,132px);line-height:.82;margin:0;letter-spacing:-.01em;text-transform:uppercase}
.brand h1 em{font-style:normal;color:var(--line)}
.brand p{margin:0 0 6px;max-width:34ch;font-size:15px;line-height:1.45;color:var(--muted)}
.stats{font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;margin-bottom:22px;display:flex;gap:18px;flex-wrap:wrap}
.sandbox-card{display:grid;grid-template-columns:auto 1fr;gap:2px 18px;align-items:baseline;width:100%;margin-bottom:28px;padding:14px 18px;text-align:left;background:var(--ink);color:var(--paper);border:1.5px solid var(--ink);border-radius:4px;box-shadow:4px 4px 0 var(--line)}
.sandbox-card:hover{transform:translate(-1px,-1px);box-shadow:5px 5px 0 var(--line)}
.sb-k{grid-column:1/-1;font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--gold)}
.sb-t{font-family:var(--disp);font-weight:900;font-size:40px;line-height:1;text-transform:uppercase}
.sb-d{font-size:14px;line-height:1.4;color:var(--grid);max-width:60ch}
@media (max-width:560px){.sandbox-card{grid-template-columns:1fr}}
.props{position:fixed;left:16px;top:50%;transform:translateY(-50%);display:flex;flex-direction:column;gap:4px;padding:6px}
.props-h{font-family:var(--mono);font-size:9.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);text-align:center;padding-top:2px}
@media (max-width:640px){.props{top:auto;bottom:calc(env(safe-area-inset-bottom,0px) + 86px);transform:none;flex-direction:row;left:16px;right:16px;overflow-x:auto}.props-h{display:none}}
.chapter{margin-bottom:26px}
.chapter h2{display:flex;align-items:baseline;gap:12px;margin:0 0 10px;font-family:var(--disp);font-weight:800;font-size:28px;text-transform:uppercase;letter-spacing:.02em}
.chapter h2 small{font-family:var(--mono);font-size:11px;font-weight:500;color:var(--muted);letter-spacing:.1em}
.chapter h2 .swatch{width:14px;height:14px;border:1.5px solid var(--ink);border-radius:2px;align-self:center}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(84px,1fr));gap:10px}
.cell{aspect-ratio:1/1;max-width:100%;display:flex;flex-direction:column;justify-content:space-between;padding:8px;background:var(--panel);border:1.5px solid var(--ink);border-radius:4px;box-shadow:3px 3px 0 var(--ink);text-align:left}
.cell:hover:not(:disabled){transform:translate(-1px,-1px);box-shadow:4px 4px 0 var(--ink)}
.cell:disabled{opacity:.45;box-shadow:none;cursor:not-allowed;background:transparent}
.cell .n{font-family:var(--disp);font-weight:900;font-size:34px;line-height:.9}
.cell .t{font-size:10.5px;line-height:1.15;color:var(--muted);overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.cell .st{font-size:13px;letter-spacing:1px;color:var(--grid)}
.cell .st .on{color:var(--gold)}
.cell.done{background:#fff}
.help{margin-top:30px;display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:14px;font-size:13.5px;line-height:1.45}
.help div{padding:12px 14px;background:var(--panel);border:1.5px solid var(--ink);border-radius:4px}
.help h3{margin:0 0 4px;font-family:var(--disp);font-size:18px;text-transform:uppercase;letter-spacing:.03em}
.help kbd{font-family:var(--mono);font-size:11.5px;padding:0 4px;border:1px solid var(--grid);border-radius:3px;background:#fff}

.modal{position:fixed;inset:0;display:grid;place-items:center;padding-inline:16px;background:rgba(22,32,43,.35)}
.card{width:min(380px,100%);padding:22px 22px 18px;background:var(--panel);border:1.5px solid var(--ink);border-radius:4px;box-shadow:6px 6px 0 var(--ink);text-align:center}
.card h2{margin:0;font-family:var(--disp);font-weight:900;font-size:52px;line-height:.9;text-transform:uppercase}
.card .big{font-size:40px;letter-spacing:6px;margin:12px 0 4px;color:var(--grid)}
.card .big .on{color:var(--gold)}
.card ul{list-style:none;padding:0;margin:8px 0 16px;font-family:var(--mono);font-size:12px;text-align:left;display:grid;gap:5px}
.card li{display:flex;justify-content:space-between;gap:10px;padding:5px 8px;background:var(--paper);border-radius:3px}
.card li.ok{background:#E6F4EC}
.row{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}
.btn{padding:10px 16px;border:1.5px solid var(--ink);border-radius:4px;background:var(--panel);font-weight:700;box-shadow:3px 3px 0 var(--ink)}
.btn.primary{background:var(--line);color:#fff}
.btn:active{transform:translate(2px,2px);box-shadow:1px 1px 0 var(--ink)}
.banner{position:fixed;left:50%;top:40%;transform:translate(-50%,-50%) rotate(-4deg);font-family:var(--disp);font-weight:900;font-size:clamp(48px,11vw,96px);text-transform:uppercase;color:var(--hazard);-webkit-text-stroke:2px var(--ink);pointer-events:none;letter-spacing:.02em}
@media (max-width:640px){
  /* HUD: name + menu button on one row, the three meters sharing the row below */
  .hud{flex-wrap:wrap;gap:8px}
  .lvl{flex:1 1 auto;margin-right:52px}
  .lvl .nm{font-size:19px;max-width:none}
  .meters{order:3;width:100%;flex-wrap:nowrap;gap:6px}
  .meter{flex:1 1 0;min-width:0;padding:5px 8px;font-size:11px}
  .meter .spd{font-size:18px;min-width:0}
  #menuBtn{position:fixed;right:16px;top:calc(env(safe-area-inset-top,0px) + 10px)}
  .tip{top:calc(env(safe-area-inset-top,0px) + 118px);font-size:13px}
  /* toolbar: tools wrap onto one row, a full-width Ride bar underneath for thumbs */
  .tools{flex-wrap:wrap;justify-content:center;width:calc(100% - 32px);overflow-x:visible;gap:4px}
  .tool{width:calc((100% - 32px) / 9);min-width:34px;height:46px}
  .tool span,.tool kbd,.sep{display:none}
  .play{order:99;flex:1 0 100%;width:auto;height:46px;font-size:19px}
  .props{bottom:calc(env(safe-area-inset-bottom,0px) + 136px)}
  .props .tool{width:auto;flex:1 0 40px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}

[hidden]{display:none!important}
body{margin:0}
img{max-width:100%}
.home-link{display:inline-flex;align-items:center;gap:6px;margin-bottom:18px;font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink);text-decoration:none;border-bottom:1.5px solid var(--ink);padding-bottom:2px}
.home-link:hover{color:var(--line);border-color:var(--line)}