/* Which is bigger BIG-31. Instrument Sheet chassis, accent #4A7A2A (moss). */
:root{
  --paper:#EDE9E2;
  --ink:#1E1D1B;
  --panel:#DEDACF;
  --line:#B7B0A2;
  --chassis:#2A2924;
  --accent:#4A7A2A;
  --on-accent:#EDE9E2;          /* paper on moss is 5.1:1 */
  --font-ui:"Familjen Grotesk",system-ui,sans-serif;
  --font-spec:"Martian Mono",ui-monospace,monospace;
  --ease:cubic-bezier(.2,.8,.2,1);
  --press:6px;                  /* how far a card travels when pressed */
}
@media (prefers-color-scheme:dark){
  :root{--paper:#1E1D1B;--ink:#EDE9E2;--panel:#2A2924;--line:#4A473F;--chassis:#111;--on-accent:#EDE9E2}
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--font-ui);font-size:1rem;line-height:1.55;overflow-x:hidden}
a{color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
button{font:inherit;color:inherit}
h1,h2,h3,p,dl,dd,ol,ul,figure,pre{margin:0}
[hidden]{display:none!important}
code{font-family:var(--font-spec);font-size:.8em}

/* label strip */
.strip{max-width:1120px;margin:0 auto;padding:18px 32px 0;display:flex;justify-content:space-between;align-items:baseline;font-family:var(--font-spec);font-size:.75rem;font-weight:500;letter-spacing:.02em;border-bottom:1px solid var(--line)}
.strip-maker{text-decoration:none;padding-bottom:12px}
.strip-maker:hover{text-decoration:underline;text-underline-offset:3px}
.strip-code{padding-bottom:12px}

/* page */
.wrap{max-width:1120px;margin:0 auto;padding:40px 32px 0}
.title{font-size:4.25rem;font-weight:600;line-height:1;letter-spacing:-.01em;margin-bottom:16px;max-width:18ch}
.lede{font-size:1.125rem;max-width:56ch;margin-bottom:28px}
.section-head{font-size:2rem;font-weight:600;line-height:1.1;margin:44px 0 14px}

/* hero panel with corner ticks */
.hero{position:relative;border:1px solid var(--line);background:var(--panel);padding:24px 32px 32px}
.hero::before,.hero::after,.hero>.ticks::before,.hero>.ticks::after{content:"";position:absolute;width:14px;height:14px;border:0 solid var(--accent);pointer-events:none;z-index:2}
.hero::before{top:-1px;left:-1px;border-top-width:1px;border-left-width:1px}
.hero::after{top:-1px;right:-1px;border-top-width:1px;border-right-width:1px}
.hero>.ticks::before{bottom:-1px;left:-1px;border-bottom-width:1px;border-left-width:1px}
.hero>.ticks::after{bottom:-1px;right:-1px;border-bottom-width:1px;border-right-width:1px}

/* the strip of ten squares */
.track{display:flex;gap:6px;margin-bottom:22px}
.track span{width:24px;height:24px;border:1px solid var(--line);position:relative;transition:background .15s var(--ease),border-color .15s}
.track span.is-now{border-color:var(--ink)}
.track span.is-right{background:var(--accent);border-color:var(--accent)}
.track span.is-wrong{border-color:var(--ink)}
.track span.is-wrong::after{content:"";position:absolute;left:-2px;right:-2px;top:50%;height:1px;background:var(--ink);transform:rotate(-45deg)}

.question{font-size:1.375rem;font-weight:500;line-height:1.25;margin-bottom:18px;max-width:40ch}

/* the two cards ARE the page */
.arena{display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);gap:0 28px;align-items:stretch}
.arena.is-out{opacity:0;transform:translateX(-18px);transition:opacity .15s var(--ease),transform .15s var(--ease)}
.arena.is-in{animation:slidein .28s var(--ease)}
@keyframes slidein{from{opacity:0;transform:translateX(28px)}to{opacity:1;transform:none}}
.or{align-self:center;font-size:1.125rem;font-weight:500;padding:0 2px}

.card{position:relative;min-width:0;display:grid;grid-template-rows:auto auto 1fr auto auto;text-align:left;min-height:400px;padding:28px 28px 24px;border:1px solid var(--ink);background:var(--paper);color:var(--ink);border-radius:0;cursor:pointer;transition:transform .12s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s}
.card::before{content:"";position:absolute;inset:0;transform:translate(var(--press),var(--press));border:0 solid var(--ink);border-right-width:1px;border-bottom-width:1px;pointer-events:none;transition:transform .12s var(--ease)}
.card:disabled{cursor:default}
.card.is-pressed{transform:translate(var(--press),var(--press))}
.card.is-pressed::before{transform:none}
.card.is-win{background:var(--accent);color:var(--on-accent);border-color:var(--accent)}
.card.is-win::before{border-color:var(--accent)}
.card:focus-visible{outline-offset:4px}

.card-name{display:block;font-size:3.25rem;font-weight:600;line-height:1;letter-spacing:-.01em;overflow-wrap:anywhere;position:relative;align-self:start;justify-self:start;max-width:100%}
.card-name.is-long{font-size:2.5rem}
.card-name.is-longer{font-size:1.875rem;line-height:1.1}
.card-name{text-decoration:line-through;text-decoration-thickness:3px;text-decoration-color:transparent;transition:text-decoration-color .25s var(--ease) .12s}
.card.is-lose .card-name{text-decoration-color:currentColor}
.card-sub{display:block;font-size:1.0625rem;margin-top:10px;opacity:.85}
.card-gap{display:block}
.card-val{display:block;font-size:3rem;font-weight:600;line-height:1;letter-spacing:-.02em;font-variant-numeric:tabular-nums;overflow-wrap:anywhere;margin-top:24px}
.card-val .q{display:block;font-size:11rem;line-height:.76;color:var(--accent);font-weight:600;letter-spacing:0;margin-bottom:-2px}
.card.is-win .card-val .q{color:var(--on-accent)}
.card-unit{display:block;font-size:.9375rem;margin-top:8px;opacity:.8}

/* after a pick */
.after{display:flex;flex-wrap:wrap;align-items:center;gap:12px 18px;margin-top:24px;min-height:46px}
.verdict{font-size:1.25rem;font-weight:500;flex:1 1 320px;max-width:60ch}
.hint{font-size:.9375rem;opacity:.7}
.loading{font-size:1.0625rem;padding:80px 0}

/* buttons */
.actions{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.btn{position:relative;display:inline-block;padding:12px 18px;border:1px solid var(--ink);background:var(--paper);color:var(--ink);font-weight:500;line-height:1.2;cursor:pointer;border-radius:0;text-decoration:none}
.btn:hover{background:var(--panel)}
.btn:disabled{opacity:.45;cursor:default}
.btn-primary{background:var(--accent);border-color:var(--accent);color:var(--on-accent)}
.btn-primary:hover{background:var(--accent)}
.btn-primary .ticks{position:absolute;inset:0;pointer-events:none}
.btn-primary::before,.btn-primary::after,.btn-primary .ticks::before,.btn-primary .ticks::after{content:"";position:absolute;width:14px;height:14px;border:0 solid var(--accent);opacity:0;pointer-events:none}
.btn-primary::before{top:-6px;left:-6px;border-top-width:1px;border-left-width:1px}
.btn-primary::after{top:-6px;right:-6px;border-top-width:1px;border-right-width:1px}
.btn-primary .ticks::before{bottom:-6px;left:-6px;border-bottom-width:1px;border-left-width:1px}
.btn-primary .ticks::after{bottom:-6px;right:-6px;border-bottom-width:1px;border-right-width:1px}
.btn-primary:hover::before,.btn-primary:hover::after,.btn-primary:hover .ticks::before,.btn-primary:hover .ticks::after,
.btn-primary:focus-visible::before,.btn-primary:focus-visible::after,.btn-primary:focus-visible .ticks::before,.btn-primary:focus-visible .ticks::after{opacity:1}
.btn-primary:focus-visible{outline-offset:4px}
.btn.is-done{background:var(--ink);color:var(--paper);border-color:var(--ink)}

/* end of a run */
.end{padding-top:8px}
.end-score{font-size:9rem;font-weight:600;line-height:.9;letter-spacing:-.03em;color:var(--accent);font-variant-numeric:tabular-nums}
.end-of{font-size:3rem;letter-spacing:-.01em;margin-left:6px}
.end-line{font-size:1.375rem;font-weight:500;margin:14px 0 22px;max-width:40ch}
.end .track{margin-bottom:26px}
.share-note{font-size:.9375rem;opacity:.8}

/* reading line */
.reading{font-family:var(--font-spec);font-size:.75rem;font-weight:500;letter-spacing:.02em;white-space:pre;margin:12px 0 0}
.vintage{font-size:.9375rem;opacity:.8;margin-top:6px;max-width:70ch}
.vintage:empty{display:none}

/* mode tiles: the big accent shapes */
.tiles{list-style:none;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.tile{display:grid;grid-template-rows:auto 1fr auto;min-height:170px;padding:18px 20px 16px;background:var(--accent);color:var(--on-accent);text-decoration:none;transition:transform .12s var(--ease)}
.tile:hover{transform:translate(2px,2px)}
.tile.is-now{background:var(--ink);color:var(--paper)}
.tile-name{font-size:1.5rem;font-weight:600;line-height:1.1}
.tile-q{font-size:1rem;margin-top:6px;opacity:.9}
.tile-count{font-family:var(--font-spec);font-size:.75rem;font-weight:500;letter-spacing:.02em;margin-top:14px}
.tile:focus-visible{outline-color:var(--ink);outline-offset:3px}

/* notes */
.notes{display:grid;grid-template-columns:repeat(12,minmax(0,1fr))}
.notes>*{grid-column:span 8}
.notes p{max-width:68ch;margin-bottom:14px}
.notes .section-head{margin-top:44px}

.foot{max-width:1120px;margin:0 auto;padding:20px 32px 40px;font-size:.875rem;opacity:.8}
.foot p{max-width:70ch}

@media (max-width:900px){
  .notes>*{grid-column:span 12}
  .tiles{grid-template-columns:repeat(2,minmax(0,1fr))}
  .card{min-height:340px;padding:22px 22px 20px}
  .card-name{font-size:2.5rem}
  .card-name.is-long{font-size:2rem}
  .card-name.is-longer{font-size:1.5rem}
  .card-val{font-size:2.25rem}
  .card-val .q{font-size:7.5rem}
  .end-score{font-size:7rem}
}
@media (max-width:640px){
  .strip{padding:14px 16px 0}
  .wrap{padding:28px 16px 0}
  .title{font-size:2.5rem}
  .lede{font-size:1rem;margin-bottom:20px}
  .hero{padding:18px 16px 22px}
  .track span{width:20px;height:20px}
  .arena{grid-template-columns:1fr;gap:18px 0}
  .or{justify-self:start;padding:0}
  .card{min-height:0;padding:18px 18px 16px}
  .card-gap{min-height:14px}
  .card-name{font-size:2.25rem}
  .card-name.is-long{font-size:1.75rem}
  .card-name.is-longer{font-size:1.375rem}
  .card-sub{font-size:1rem;margin-top:6px}
  .card-val{font-size:2rem;margin-top:16px}
  .card-val .q{font-size:5.5rem;line-height:.82}
  .question{font-size:1.125rem;margin-bottom:14px}
  .verdict{font-size:1.125rem}
  .hint{display:none}
  .end-score{font-size:5.5rem}
  .end-of{font-size:2rem}
  .end-line{font-size:1.125rem}
  .tiles{grid-template-columns:1fr}
  .tile{min-height:0}
  .section-head{font-size:1.625rem}
  .foot{padding:16px 16px 32px}
}

@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
}