/* Pasteboard CLP-05. Instrument Sheet chassis, accent #2E6E8E (slate teal). */
:root{
  --paper:#EDE9E2;
  --ink:#1E1D1B;
  --panel:#DEDACF;
  --line:#B7B0A2;
  --chassis:#2A2924;
  --accent:#2E6E8E;
  --on-accent:#EDE9E2;      /* paper on teal is 4.6:1: display and control sizes. Small type lives on the paper slips */
  --slab-paper:#EDE9E2;     /* the paper slips keep their colour in both schemes */
  --slab-panel:#DEDACF;
  --slab-ink:#1E1D1B;
  --slab-line:#B7B0A2;
  --hair:rgba(237,233,226,.34);
  --wash:#D9E4EA;           /* the slip's flash when a tool runs: teal thinned with paper */
  --font-ui:"Familjen Grotesk",system-ui,sans-serif;
  --font-spec:"Martian Mono",ui-monospace,monospace;
  --ease:cubic-bezier(.2,.8,.2,1);
}
@media (prefers-color-scheme:dark){
  :root{--paper:#1E1D1B;--ink:#EDE9E2;--panel:#2A2924;--line:#4A473F;--chassis:#111}
}

*{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,fieldset,blockquote{margin:0}
ol,ul{padding:0;list-style:none}
fieldset{padding:0;border:0;min-width:0}
[hidden]{display:none!important}
code{font-family:var(--font-spec);font-size:.8em}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* 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:4.5rem;font-weight:600;line-height:1;letter-spacing:-.01em;margin-bottom:16px}
.lede{font-size:1.125rem;max-width:60ch;margin-bottom:28px}
.lede strong{font-weight:600}
.subhead{font-size:1.375rem;font-weight:500;line-height:1.25}
.section-head{font-size:2rem;font-weight:600;line-height:1.1;margin:40px 0 14px}

/* the teal board: the one accent shape. Paper slips are pinned on it */
.hero{position:relative;background:var(--accent);color:var(--on-accent);padding:28px 40px 40px;overflow:clip}
.hero::before,.hero::after,.hero>.ticks::before,.hero>.ticks::after{content:"";position:absolute;width:14px;height:14px;border:0 solid var(--on-accent);pointer-events:none;z-index:2}
.hero::before{top:0;left:0;border-top-width:1px;border-left-width:1px}
.hero::after{top:0;right:0;border-top-width:1px;border-right-width:1px}
.hero>.ticks::before{bottom:0;left:0;border-bottom-width:1px;border-left-width:1px}
.hero>.ticks::after{bottom:0;right:0;border-bottom-width:1px;border-right-width:1px}

.board-head{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:16px 32px;margin-bottom:26px}
.readout{min-width:0;flex:1 1 420px}
.big{font-size:clamp(2.75rem,6vw,5rem);font-weight:600;line-height:.95;letter-spacing:-.03em;overflow-wrap:anywhere;min-height:1em}
.big.is-tick{animation:tick .26s var(--ease) both}
@keyframes tick{0%{transform:translateY(.28em);opacity:.4}100%{transform:none;opacity:1}}
.verdict{font-size:1.375rem;font-weight:500;line-height:1.3;max-width:48ch;margin-top:10px;min-height:1.3em}
.board-tools{display:flex;flex-wrap:wrap;gap:10px;flex:0 0 auto;padding-bottom:6px}

/* buttons */
.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;text-align:center}
.btn:hover:not(:disabled){background:var(--panel)}
.btn:disabled{opacity:.45;cursor:default}
.btn-primary{background:var(--slab-ink);border-color:var(--slab-ink);color:var(--slab-paper);padding-left:22px;padding-right:22px;font-size:1.0625rem;font-weight:600}
.btn-primary:hover:not(:disabled){background:var(--slab-ink)}
.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(--on-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-color:var(--on-accent);outline-offset:4px}
.btn-ghost{background:transparent;border-color:var(--on-accent);color:var(--on-accent);font-size:1.0625rem;font-weight:600}
.btn-ghost:hover:not(:disabled){background:rgba(237,233,226,.14)}
.btn-ghost:focus-visible{outline-color:var(--on-accent);outline-offset:4px}

/* the slips */
.board{position:relative;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px 20px;align-items:start}
.slip{position:relative;min-width:0;display:flex;flex-direction:column;background:transparent;color:var(--on-accent);border:1px solid var(--hair);min-height:240px;touch-action:pan-y}
.slip.is-filled{background:var(--slab-paper);color:var(--slab-ink);border-color:var(--slab-paper)}
.slip.is-selected{outline:2px solid var(--slab-ink);outline-offset:0}
.slip.is-selected:not(.is-filled){outline-color:var(--on-accent)}
.slip.is-landing{animation:land .34s var(--ease) both}
@keyframes land{0%{transform:translateY(-22px) rotate(-1.5deg);opacity:0}70%{transform:translateY(2px) rotate(.2deg);opacity:1}100%{transform:none;opacity:1}}
.slip.is-drag{z-index:5;transition:none!important;outline:2px solid var(--slab-ink);outline-offset:0;cursor:grabbing}
.slip.is-drag.is-filled{background:var(--slab-panel)}
.slip.is-settle{transition:transform .22s var(--ease)}
.slip.is-flip{transition:transform .22s var(--ease)}

/* the ink tack: the motif. Drops in when a slip fills, lifts off when it clears */
.tack{position:absolute;top:-7px;left:50%;width:14px;height:14px;margin-left:-7px;background:var(--slab-ink);border-radius:50%;z-index:3;pointer-events:none;display:none}
.tack::after{content:"";position:absolute;left:50%;top:9px;width:2px;height:9px;margin-left:-1px;background:var(--slab-ink)}
.slip.is-filled .tack{display:block}
.slip.is-landing .tack{animation:pin .3s .16s var(--ease) both}
@keyframes pin{0%{transform:translateY(-18px) scale(1.5);opacity:0}70%{transform:translateY(1px) scale(1);opacity:1}100%{transform:none;opacity:1}}
.slip.is-lifting .tack{display:block;animation:lift .26s var(--ease) both}
@keyframes lift{0%{transform:none;opacity:1}100%{transform:translateY(-16px) rotate(20deg);opacity:0}}

.slip-head{display:flex;align-items:center;gap:6px;padding:12px 10px 4px 14px}
.slip-head .btn-tiny{flex:0 0 auto}
.slip-title{flex:1 1 auto;min-width:0;font:inherit;font-size:1.0625rem;font-weight:600;line-height:1.2;color:inherit;background:transparent;border:0;border-bottom:1px solid transparent;border-radius:0;padding:4px 0}
.slip-title::placeholder{color:inherit;opacity:.55}
.slip-title:hover{border-bottom-color:currentColor}
.slip-title:focus{outline:none;border-bottom-color:currentColor}
.slip-n{font-family:var(--font-spec);font-size:.6875rem;font-weight:500;letter-spacing:.02em;white-space:nowrap}
.grip{flex:0 0 auto;width:30px;height:30px;padding:0;border:0;background:transparent;color:inherit;cursor:grab;display:inline-flex;align-items:center;justify-content:center;border-radius:0;touch-action:none}
.grip:active{cursor:grabbing}
.grip svg{width:16px;height:16px;display:block}
.grip:focus-visible{outline:2px solid currentColor;outline-offset:1px}
.slip-text{flex:1 1 auto;display:block;width:100%;min-height:150px;padding:8px 14px 10px;font:inherit;font-size:1rem;line-height:1.45;color:inherit;background:transparent;border:0;border-radius:0;resize:vertical;color-scheme:light;overflow-wrap:anywhere}
.slip-text::placeholder{color:inherit;opacity:.6}
.slip-text:focus{outline:none}
.slip.is-filled .slip-text:focus{background:var(--slab-paper)}
.slip.is-flash .slip-text{animation:wash .38s var(--ease) both}
@keyframes wash{0%{background:var(--wash)}100%{background:transparent}}
.slip-foot{display:grid;gap:3px;padding:8px 14px 10px;border-top:1px solid var(--hair)}
.slip.is-filled .slip-foot{border-top-color:var(--slab-panel)}
.slip:not(.is-filled) .slip-foot{opacity:.75}
.slip-read{font-family:var(--font-spec);font-size:.6875rem;font-weight:500;letter-spacing:.02em;white-space:pre}
.btn-tiny{padding:5px 9px;font-size:.9375rem;font-weight:500;background:transparent;border:1px solid currentColor;color:inherit;border-radius:0;cursor:pointer;line-height:1.2;white-space:nowrap}
.btn-tiny:hover:not(:disabled){background:rgba(30,29,27,.08)}
.slip:not(.is-filled) .btn-tiny:hover:not(:disabled){background:rgba(237,233,226,.14)}
.btn-tiny:disabled{opacity:.4;cursor:default}
.btn-tiny:focus-visible{outline:2px solid currentColor;outline-offset:2px}
.btn-tiny.is-done{background:var(--slab-ink);border-color:var(--slab-ink);color:var(--slab-paper)}

/* the bench: a paper inset at the foot of the board, tools in groups */
.bench{margin-top:28px;background:var(--slab-paper);color:var(--slab-ink);padding:18px 22px 22px}
.bench-head{display:flex;flex-wrap:wrap;align-items:baseline;gap:8px 18px}
.bench-title{font-size:1.375rem;font-weight:600;line-height:1.2}
.bench-target{font-weight:600;border-bottom:3px solid var(--accent)}
.bench-read{font-family:var(--font-spec);font-size:.75rem;font-weight:500;letter-spacing:.02em;white-space:pre}
.tool-undo{margin-left:auto}
.bench-note{font-size:1rem;margin:6px 0 14px;max-width:70ch;min-height:1.55em}
.bench-groups{display:flex;flex-wrap:wrap;gap:16px 32px}
.group{min-width:0}
.group legend{font-size:.9375rem;font-weight:500;margin-bottom:8px;padding:0;opacity:.85}
.tools{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.tool{padding:9px 12px;border:1px solid var(--slab-ink);background:var(--slab-paper);color:var(--slab-ink);font-weight:500;font-size:.9375rem;line-height:1.2;cursor:pointer;border-radius:0;white-space:nowrap}
.tool:hover:not(:disabled){background:var(--slab-panel)}
.tool:disabled{opacity:.4;cursor:default}
.tool:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.tool.is-done{background:var(--slab-ink);color:var(--slab-paper)}
.join{display:inline-flex;align-items:stretch}
.join .tool{border-right:0}
.join-sep{width:4.5em;font-family:var(--font-spec);font-size:.8125rem;padding:0 8px;border:1px solid var(--slab-ink);background:var(--slab-paper);color:var(--slab-ink);border-radius:0;color-scheme:light}
.join-sep:focus-visible{outline:2px solid var(--accent);outline-offset:-2px}

/* reading line */
.reading{font-family:var(--font-spec);font-size:.75rem;font-weight:500;letter-spacing:.02em;white-space:pre;margin:12px 0 0}

/* under the board: notes on the left, the storage panel on the right */
.under{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:24px 32px;margin-top:32px;align-items:start}
.left{grid-column:span 7;min-width:0}
.controls{grid-column:span 5;min-width:0}
.tabnotes{margin-bottom:24px}
.tabnotes p{max-width:64ch;margin-top:8px}
.panel{position:relative;border:1px solid var(--line);background:var(--panel);padding:24px 28px 28px;display:grid;gap:24px}
.field-set{min-width:0}
.field-set legend{font-size:1rem;font-weight:500;margin-bottom:8px;padding:0}
.field-note{font-size:.9375rem;margin-top:6px;opacity:.9}
.field-note.is-warn{opacity:1;font-weight:500;border-left:4px solid var(--accent);padding-left:10px}
.panel-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.keys div{display:flex;justify-content:space-between;gap:12px;padding:8px 0;border-bottom:1px solid var(--line);font-size:.9375rem}
.keys div:last-child{border-bottom:0}
.keys dd{white-space:nowrap;text-align:right}

/* 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}

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

/* narrow screens */
@media (max-width:960px){
  .board{grid-template-columns:repeat(2,minmax(0,1fr))}
  .notes>*{grid-column:span 12}
  .under{grid-template-columns:1fr}
  .left,.controls{grid-column:span 1}
  .controls{order:2}
}
@media (max-width:640px){
  .strip{padding:14px 16px 0}
  .wrap{padding:28px 16px 0}
  .title{font-size:2.75rem}
  .lede{font-size:1rem}
  .hero{padding:18px 16px 22px}
  .board-head{margin-bottom:20px}
  .verdict{font-size:1.125rem}
  .board-tools{width:100%}
  .board-tools .btn{flex:1 1 45%}
  .board{grid-template-columns:minmax(0,1fr);gap:18px}
  .slip{min-height:0}
  .slip-text{min-height:110px}
  .slip:not(.is-filled) .slip-text{min-height:0;height:84px}
  .bench{padding:16px 14px 18px}
  .bench-title{font-size:1.125rem}
  .bench-groups{gap:14px 20px}
  .tool{padding:9px 10px;font-size:.9375rem}
  .panel{padding:20px 16px 22px;gap:20px}
  .panel-actions .btn{flex:1 1 100%}
  .keys dd{white-space:normal}
  .section-head{font-size:1.625rem}
  .foot{padding:16px 16px 32px}
}

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