/* This post's own diagrams: what the kit's primitives do not draw. Every colour and size is a
   design-system token. The kit (kit.css) draws the stages, tracks, cells, markers and bars.
   The layout and motion follow the owner's reference page (docs/prototypes/reference). */

/* ---- the hero: heading, lede and hint, then the figure at full width ---- */
.hero{max-width:1060px;align-items:start}
.hero h1{font-size:clamp(40px,7vw,84px);max-width:14ch}
.hero .sub{max-width:58ch}
.hero>.hint{max-width:64ch;margin:14px 0 0;color:var(--muted)}
.hero>.stage{margin:28px 0 8px}
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:22px;align-items:start}
@container (max-width:620px){.hero-grid{grid-template-columns:minmax(0,1fr)}}
.reqtag{display:inline-block;font:700 var(--fs-sm) var(--body);background:var(--ink);color:var(--on-ink);border-radius:8px;padding:3px 10px}
.shelf-h{font-size:var(--fs-sm);color:var(--muted);font-weight:700;margin:0 0 10px}
.entry{display:grid;grid-template-columns:36px minmax(0,1fr) auto;gap:12px;align-items:center;border:1.5px solid var(--line);border-radius:12px;padding:8px 12px;background:var(--paper);margin-bottom:8px;transition:border-color .4s}
.entry b{display:block;font-size:var(--fs-sm)}
.entry code{font-size:var(--fs-2xs);color:var(--muted);background:none;padding:0}
.e-state{font-size:var(--fs-2xs);font-weight:700;padding:3px 10px;border-radius:var(--pill);background:var(--soft);color:var(--ink)}
.entry.is-ok{border-color:var(--ok)}.entry.is-ok .e-state{background:var(--ok);color:var(--on-ok)}
.entry.is-new{border-color:var(--new)}.entry.is-new .e-state{background:var(--new);color:var(--on-new)}
.entry-sm{margin:0;grid-template-columns:28px auto;padding:4px 10px}
.entry-sm .ring{width:26px;height:26px}
.entry-sm .fg{--left:70}
/* The key terms: a bracket under a prefix, a flag with a pennant, a hit and a miss block. */
.brace{position:absolute;left:0;width:74%;bottom:-6px;height:9px;border:2.5px solid var(--ok);border-top:0;border-radius:0 0 6px 6px}
.marker.pennant::after{content:"";position:absolute;right:0;top:0;border:5px solid transparent;border-right:11px solid var(--ink);border-left:0}
.hm{flex:1;height:30px;border-radius:var(--r1);display:grid;place-items:center;font:700 var(--fs-2xs)/1 var(--body)}
.hm.is-ok{background:var(--ok);color:var(--on-ok)}
.hm.is-bad{background:repeating-linear-gradient(135deg,var(--bad) 0 5px,color-mix(in srgb,var(--bad) 75%,var(--ink)) 5px 10px);color:var(--on-bad)}

/* ---- spacing that the approved post set inline ---- */
.gap-top{margin-top:30px}
.ch-body h3{margin-top:26px}
.hscroll{overflow-x:auto;padding-bottom:6px}

/* ---- chapter 1: the strip and its prefixes ---- */
.order{display:flex;gap:6px;min-width:560px}
.order>div{border-radius:var(--r2);padding:14px;font-weight:700}
.order small{display:block;font-weight:500;font-size:var(--fs-2xs);opacity:.9}
.order .o-t{flex:2;background:var(--c1);color:var(--on-c1)}
.order .o-s{flex:2;background:var(--c2);color:var(--on-c2)}
.order .o-m{flex:5;background:var(--c3);color:var(--on-c3);display:flex;gap:6px;padding:6px}
.order .o-m span{flex:1;background:color-mix(in srgb,var(--on-c3) 16%,transparent);border-radius:7px;padding:8px;font-size:var(--fs-2xs)}
.brackets{position:relative;min-width:560px;height:128px;margin-top:6px}
.brk{position:absolute;left:0;height:22px;border:2px solid var(--ok);border-top:0;border-radius:0 0 8px 8px;font-size:var(--fs-xs);font-weight:700;color:var(--ok)}
.brk span{position:absolute;left:8px;top:24px;white-space:nowrap}
.brk:nth-child(1){top:0;width:22.2%}.brk:nth-child(2){top:42px;width:44.5%}.brk:nth-child(3){top:84px;width:100%}
#fig-dep .arcs svg{height:120px}

/* ---- chapter 2: pick what request 2 changes; the fingerprint table ---- */
.fp-tbl{margin-top:8px;font-size:var(--fs-xs)}
.fp-tbl .mono{font-family:var(--mono)}
.fp-tbl tr td{transition:background-color .3s}
.fp-tbl tr.is-on td{background:color-mix(in srgb,var(--focus) 28%,transparent)}
.fp-diff{color:var(--bad);font-weight:600;text-decoration:underline dotted}
.res{display:inline-block;font-weight:700;border-radius:var(--pill);padding:1px 9px;background:var(--soft);color:var(--muted)}
.res-match{background:var(--ok);color:var(--on-ok)}
.res-match::before{content:"✓ "}
.res-nomatch{background:var(--bad);color:var(--on-bad)}
.res-nomatch::before{content:"✕ "}

/* ---- chapter 3: the 20-position walk over one row of 35 blocks ---- */
.lb{display:grid;grid-template-columns:repeat(35,minmax(20px,1fr));gap:4px;min-width:760px;padding-top:30px}
.sq{position:relative;aspect-ratio:1/1.5;border-radius:var(--r1);background:var(--c3);color:var(--on-c3);font:600 10.5px var(--mono);display:flex;align-items:flex-end;justify-content:center;padding-bottom:3px;
  transition:opacity .5s,background-color .5s,box-shadow .25s}
.sq.off{opacity:.13}
.sq.checked{box-shadow:inset 0 0 0 2px var(--focus)}
.sq.is-scan{box-shadow:0 0 0 3px var(--focus),0 0 0 4.5px var(--ink),0 0 16px var(--focus);z-index:2}
.sq.s-hit{background:var(--ok);color:var(--on-ok)}
.sq.s-new{background:var(--new);color:var(--on-new)}
.sq.s-miss{background:repeating-linear-gradient(135deg,var(--bad) 0 4px,color-mix(in srgb,var(--bad) 70%,var(--ink)) 4px 8px);color:var(--on-bad)}
.sq .dot{position:absolute;top:4px;left:50%;margin-left:-4.5px;width:9px;height:9px;border-radius:50%;background:var(--surface);box-shadow:0 0 0 2px var(--ink);transform:scale(0);transition:transform .5s cubic-bezier(.2,.9,.3,1.5)}
.sq.has-entry .dot{transform:scale(1)}
.sq.flag::before{content:"";position:absolute;top:-26px;left:50%;width:2px;height:26px;background:var(--ink)}
.sq.flag::after{content:"";position:absolute;top:-26px;left:calc(50% + 2px);border:6px solid transparent;border-left:12px solid var(--ink);border-right:0}
.lb-meta{display:flex;flex-wrap:wrap;gap:8px 22px;margin:12px 0 0;font-size:var(--fs-xs);color:var(--muted);max-width:none}
.lb-meta b{color:var(--ink);font-variant-numeric:tabular-nums}
.lb-meta>span{display:inline-flex;align-items:center;gap:6px}
.dot-key{display:inline-block;width:9px;height:9px;border-radius:50%;background:var(--surface);box-shadow:0 0 0 2px var(--ink)}
.flag-key{display:inline-block;width:2px;height:14px;background:var(--ink);position:relative;margin-right:8px}
.flag-key::after{content:"";position:absolute;left:2px;top:0;border:4px solid transparent;border-left:7px solid var(--ink);border-right:0}
.flag-key.auto{background:var(--new)}.flag-key.auto::after{border-left-color:var(--new)}
.stage-top .toy-controls{margin:0}
.stage-top .seg{flex:0 1 auto;flex-wrap:wrap;border-radius:var(--r3)}

/* ---- the interactive toys: the clock and the playground (fig.js) ---- */
.toy{background:var(--surface);border:1px solid var(--line);border-radius:var(--r4);padding:clamp(16px,3vw,26px);box-shadow:var(--shadow);margin:28px 0 8px;min-width:0}
.toy-controls{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:10px 0 4px}
.timer{display:grid;grid-template-columns:200px minmax(0,1fr);gap:26px;align-items:center;margin-top:10px}
@media (max-width:800px){.timer{grid-template-columns:minmax(0,1fr);justify-items:start}}
.bigring{position:relative;width:200px;height:200px}
.bigring svg{width:100%;height:100%;transform:rotate(-90deg)}
.bigring circle{fill:none;stroke-width:12}
.bigring .bg{stroke:var(--soft)}
.bigring .fg{stroke:var(--ok);stroke-linecap:round;stroke-dasharray:339.3;stroke-dashoffset:339.3;transition:stroke .4s}
.bigring.is-low .fg{stroke:var(--bad)}
.bigring.is-empty .fg{opacity:0}
.bigring.is-pulse{animation:ring-pulse 1s ease}
@keyframes ring-pulse{40%{transform:scale(1.05)}}
.bigring .center{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center}
.bigring .clock{font:700 36px/1 var(--mono);font-variant-numeric:tabular-nums}
.bigring .lbl{font-size:var(--fs-2xs);color:var(--muted);margin-top:6px;max-width:120px}
.totals{display:flex;flex-wrap:wrap;gap:6px 22px;font-size:var(--fs-sm);margin:10px 0 0;max-width:none}
.totals b{font-family:var(--mono)}
.log{list-style:none;margin:12px 0 0;padding:0;display:flex;flex-direction:column;gap:6px;font-size:var(--fs-sm);min-height:170px}
.log li{padding:6px 10px;border-radius:var(--r2);background:var(--paper);border-left:4px solid var(--line);animation:drop-in .6s ease}
.log li.is-ok{border-left-color:var(--ok)}.log li.is-new{border-left-color:var(--new)}.log li.is-bad{border-left-color:var(--bad)}
@keyframes drop-in{from{opacity:0;transform:translateY(-16px) scale(.97)}}

/* ---- chapter 5: organizations, workspaces and the people in them ---- */
.orgs{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:16px;margin-top:10px}
.org{border:2px solid var(--ink);border-radius:var(--r3);padding:14px}
.org-a{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;align-content:start}
.org-a .org-h{grid-column:1/-1;margin-bottom:0}
@container (max-width:640px){.orgs,.org-a{grid-template-columns:minmax(0,1fr)}}
.org-h{font-weight:700;font-family:var(--display);margin-bottom:10px}
.ws{background:var(--paper);border:1.5px dashed var(--muted);border-radius:var(--r3);padding:12px;min-width:0}
.ws-h{font-size:var(--fs-xs);font-weight:700;color:var(--muted);margin-bottom:8px}
.person{display:grid;grid-template-columns:38px minmax(0,1fr);grid-template-areas:"av nm" "av key" "out out";column-gap:10px;align-items:center;padding:6px;border-radius:var(--r2);margin-bottom:4px;transition:background-color .5s}
.person.is-focus{background:color-mix(in srgb,var(--focus) 30%,transparent)}
.av{grid-area:av;width:38px;height:38px;border-radius:50%;display:grid;place-items:center;font-weight:700}
.av.c1{background:var(--c1);color:var(--on-c1)}.av.c2{background:var(--c2);color:var(--on-c2)}.av.c3{background:var(--c3);color:var(--on-c3)}.av.c4{background:var(--c4);color:var(--on-c4)}
.person .nm{grid-area:nm;font-weight:700;font-size:var(--fs-sm);line-height:1.1}
.person .key{grid-area:key;font:var(--fs-2xs) var(--mono);color:var(--muted)}
.person .badge{grid-area:out;justify-self:start;margin-top:6px;text-transform:none;letter-spacing:0}
.ws .entry{margin:8px 0 0;grid-template-columns:30px minmax(0,1fr) auto;padding:6px 10px;background:var(--surface)}
.ws .entry .ring{width:28px;height:28px}

/* ---- chapter 6 and 9: the ways, one above the other ---- */
.duo{display:grid;grid-template-columns:minmax(0,1fr);gap:14px;margin-top:6px}
.way{border:1px solid var(--line);border-radius:var(--r3);padding:16px;background:var(--paper);transition:opacity .5s;min-width:0}
.way.is-quiet{opacity:.45}
.way h3{font-size:var(--fs-lg)}
.way .hint{margin:4px 0 0;color:var(--muted)}
.verdict{font-weight:700;font-size:var(--fs-sm);margin:10px 0 0;min-height:1.5em;max-width:none}
.verdict.is-bad{color:var(--bad)}.verdict.is-ok{color:var(--ok)}
.cell.deferred{outline-color:var(--c1)}
.avail{margin:18px 0 0;font-size:var(--fs-sm);border-left:4px solid var(--ink);padding:4px 0 4px 14px;max-width:70ch}

/* ---- chapter 7: prices and the worked example ---- */
.bar-row .nm small{display:block;font-weight:500;color:var(--muted);font-size:var(--fs-2xs)}
.bar-row .usd{font:600 var(--fs-sm) var(--mono)}
.bar{display:flex;align-items:center;padding-left:10px;font:700 var(--fs-2xs) var(--mono);color:var(--on-ink);white-space:nowrap;overflow:hidden}
.bar.b-base{--fill:var(--muted)}.bar.b-1h{--fill:var(--c2);color:var(--on-c2)}
.bar.is-new{color:var(--on-new)}
.bar.is-zero{width:0}
.worked{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin-top:8px}
@container (max-width:560px){.worked{grid-template-columns:minmax(0,1fr)}}
.worked h3{font-size:var(--fs-lg);margin-bottom:10px}
.wk{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px;font-size:var(--fs-sm)}
.wk li{display:flex;justify-content:space-between;gap:12px;padding:8px 12px;border-radius:8px;background:var(--paper);transition:opacity .6s,transform .6s}
.wk li b{font-family:var(--mono);font-weight:600}
.wk li.total{background:var(--ink);color:var(--on-ink);font-weight:700}
.wk li.is-dim{opacity:0;transform:translateY(8px)}
.wk .badge{margin-right:6px}

/* ---- chapter 8: the receipt, each part growing from nothing ---- */
.receipt{margin-top:12px;min-height:54px;min-width:560px;flex-wrap:nowrap}
.receipt>span{min-width:0;overflow:hidden;white-space:nowrap;padding-inline:4px;transition:flex-grow 1.8s cubic-bezier(.2,.8,.2,1)}
.receipt>span.is-zero{flex-grow:0;padding-inline:0}
.receipt>#rc3{--fill:var(--muted);--on:var(--on-ink)}
.fields{display:grid;grid-template-columns:auto minmax(0,1fr);gap:8px 16px;margin:16px 0 0;font-size:var(--fs-sm)}
.fields dd{margin:0;color:var(--muted)}
@container (max-width:560px){.fields{grid-template-columns:minmax(0,1fr)}.fields dd{margin-bottom:8px}}

/* ---- chapter 9: small blocks, one strip per kind of breakpoint ---- */
.mini-strip{display:flex;gap:4px;padding-top:26px;min-height:74px;min-width:360px}
.ms{position:relative;width:44px;height:40px;border-radius:7px;flex:none;display:grid;place-items:center;font:600 11px var(--mono);transition:background-color .6s,color .6s}
.ms.k-t{background:var(--c1);color:var(--on-c1)}.ms.k-s{background:var(--c2);color:var(--on-c2)}.ms.k-m{background:var(--c3);color:var(--on-c3)}
.ms.r-read{background:var(--ok);color:var(--on-ok)}.ms.r-write{background:var(--new);color:var(--on-new)}
.ms.r-in,.sw.sw-in{background:repeating-linear-gradient(135deg,var(--muted) 0 4px,color-mix(in srgb,var(--muted) 70%,var(--surface)) 4px 8px);color:var(--on-ink)}
.ms .flag,.pq .flag{position:absolute;top:-24px;left:50%;width:2px;height:24px;background:var(--ink)}
.ms .flag::after,.pq .flag::after{content:"";position:absolute;left:2px;top:0;border:6px solid transparent;border-left:12px solid var(--ink);border-right:0}
.ms .flag.auto,.pq .flag.auto{background:var(--new)}
.ms .flag.auto::after,.pq .flag.auto::after{border-left-color:var(--new)}

/* ---- chapter 11: the playground ---- */
.pg-controls{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px;margin-bottom:10px}
.pg-controls fieldset{border:1px solid var(--line);border-radius:var(--r3);padding:10px 14px 14px;margin:0;display:grid;gap:8px;min-width:0;align-content:start}
.pg-controls legend{font-weight:700;font-size:var(--fs-sm);padding:0 6px}
.pg-controls .check{font-weight:500}
.pg-grid{display:flex;flex-wrap:wrap;gap:30px 4px;padding:30px 2px 6px;min-height:80px}
/* A block: its kind on a band along the top; the whole block takes the colour of its result. */
.pq{position:relative;width:26px;height:38px;border-radius:6px;background:color-mix(in srgb,var(--band) 55%,var(--soft));transition:background-color .5s,box-shadow .2s}
.pq::before{content:"";position:absolute;left:0;right:0;top:0;height:7px;border-radius:6px 6px 0 0;background:var(--band)}
.pq.wide{width:60px}
.pq.k-t{--band:var(--c1)}.pq.k-s{--band:var(--c2)}.pq.k-m{--band:var(--c3)}
.pq.r-read{background:var(--ok)}.pq.r-write{background:var(--new)}
.pq.r-in{background:repeating-linear-gradient(135deg,var(--muted) 0 4px,color-mix(in srgb,var(--muted) 70%,var(--surface)) 4px 8px)}
.pq.is-scan{box-shadow:0 0 0 3px var(--focus),0 0 0 4.5px var(--ink),0 0 14px var(--focus);z-index:2}
.pq .dot{position:absolute;bottom:5px;left:50%;margin-left:-4px;width:8px;height:8px;border-radius:50%;background:var(--surface);box-shadow:0 0 0 2px var(--ink)}
.pg-out{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin-top:16px}
@container (max-width:700px){.pg-out{grid-template-columns:minmax(0,1fr)}}
.toy.pg{container-type:inline-size}
.pg-out pre{font-size:var(--fs-2xs)}
.pg-out .tbl{font-size:var(--fs-2xs)}
.pg-out .tbl td{font-family:var(--mono)}
.pg-out tbody tr{animation:drop-in .6s ease}
.hl-read{color:var(--code-mark)}.hl-write{color:color-mix(in srgb,var(--new) 45%,var(--code-ink))}.hl-in{color:var(--code-ink)}

/* ---- generated by the post builder: each figure's own values (no style="" in the HTML) ---- */
#fig-hero{--say-ok:"cached";--say-new:"new";--w:5.5rem}
#fig-dep{--say-bad:"missed"}
#fig-fp-add{--say-ok:"cached";--say-new:"new";--say-bad:"missed"}
#fig-fp-system{--say-ok:"cached";--say-new:"new";--say-bad:"missed"}
#fig-fp-tool{--say-ok:"cached";--say-new:"new";--say-bad:"missed"}
#fig-mistake{--say-ok:"cached";--say-new:"new";--say-bad:"missed"}
#fig-tools{--say-ok:"cached";--say-new:"new";--say-bad:"missed"}
#bar1{--v:50%}
#bar2{--v:62.5%}
#bar3{--v:100%}
#bar4{--v:5%}
#rc1{--v:84}
#rc2{--v:12}
#rc3{--v:4}