/* Foldbook — the book drawn as a stair of rounds in pixel blocks on a bone page; ink-slate type, one red bookmark accent. */
:root {
  --slate: #ECEEE7; --slab: #F8F9F5; --slab-2: #DDE2DA; --rule: #C6CEC5; --rule-2: #98A49C;
  --paper: #161D24; --paper-2: #44515C; --paper-3: #6C7984;
  --mark: #E2321D; --mark-deep: #FBDAD3; --mark-ink: #FFF3EF; --gold: #A9790A;
  --pill: #161D24; --pill-ink: #ECEEE7; --pill-dim: #93A3B1;
  --px: 'Jersey 20', ui-monospace, monospace; --txt: 'Atkinson Hyperlegible', system-ui, sans-serif;
  --mono: 'Martian Mono', ui-monospace, monospace;
}
* { box-sizing: border-box; }
html { background: var(--slate); -webkit-text-size-adjust: 100%; }
body { margin: 0 auto; max-width: 1240px; padding: 12px 14px 230px; background: var(--slate); color: var(--paper); font: 400 16px/1.5 var(--txt); overflow-x: hidden; }
a { color: inherit; }
code { font-family: var(--mono); }
button { font: inherit; color: inherit; }
[hidden] { display: none !important; }


/* ---------- identity strip (small: the page has no header bar) ---------- */
.ident { display: flex; align-items: center; flex-wrap: wrap; gap: 6px 10px; min-height: 36px; }
.ident-mark { image-rendering: pixelated; border-radius: 4px; }
.ident-name { font: 400 26px/1 var(--px); letter-spacing: .02em; }
.ident-tag { font: 600 10px/1 var(--mono); color: var(--paper-2); border: 1px solid var(--rule-2); padding: 4px 6px; }
.ident-bell { margin-left: auto; font: 600 11px/1 var(--mono); color: var(--paper-2); display: inline-flex; gap: 6px; align-items: baseline; }
.ident-bell i { font-style: normal; text-transform: uppercase; letter-spacing: .08em; font-size: 9px; }
.ident-bell b { color: var(--paper); font-weight: 600; }
.ident-bell[data-hot="1"] b { color: var(--mark); animation: blink 1s steps(2, start) infinite; }

/* ---------- the verdict: who folds next, as display type ---------- */
.verdict { margin: 16px 0 6px; min-height: 64px; font: 400 46px/.95 var(--px); letter-spacing: .01em; max-width: 900px; }
.verdict b { color: var(--mark); font-weight: 400; }

/* ---------- the lede: one live sentence computed from the book ---------- */
.lede { margin: 8px 0 18px; max-width: 760px; }
.lede-now { margin: 0 0 10px; font: 400 19px/1.42 var(--txt); }
.lede-now b { color: var(--mark); font-weight: 700; }
.lede-now em { font-style: normal; color: var(--gold); }
.lede-rule { margin: 0; color: var(--paper-2); font-size: 14.5px; }
.lede-rule a { color: var(--paper); text-underline-offset: 3px; }

/* ---------- the stair: one step per round ---------- */
.stair { list-style: none; margin: 0; padding: 0; counter-reset: none; }
.stp { position: relative; display: grid; grid-template-columns: 34px minmax(0, 1fr); gap: 0 12px; padding-bottom: 14px; }
.stp::before { content: ''; position: absolute; left: 16px; top: 34px; bottom: 0; width: 2px;
  background: repeating-linear-gradient(to bottom, var(--rule-2) 0 4px, transparent 4px 8px); }
.stp:last-child::before { display: none; }
.stp-n { width: 34px; height: 34px; display: grid; place-items: center; font: 400 22px/1 var(--px); background: var(--slab-2);
  color: var(--paper-2); box-shadow: 0 -3px 0 var(--slate) inset, 3px 0 0 var(--rule-2) inset, -3px 0 0 var(--rule-2) inset, 0 3px 0 var(--rule-2) inset; }
.stp-b { min-width: 0; padding-top: 4px; }
.stp-h { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 10px; margin-bottom: 8px; }
.stp-t { font: 400 21px/1 var(--px); letter-spacing: .02em; }
.stp-s { font: 400 11px/1.3 var(--mono); color: var(--paper-3); }
.stp-pay { margin: 8px 0 0; font-size: 14px; color: var(--paper-2); }
.stp-pay b { color: var(--paper); }
.stp-pay .arrow { color: var(--mark); font-family: var(--mono); }

.stp[data-st="now"] .stp-n { background: var(--mark); color: var(--mark-ink); box-shadow: 0 0 0 3px var(--mark-deep); }
.stp[data-st="now"] .stp-b { background: var(--slab); border: 2px solid var(--rule-2); padding: 10px 10px 12px; }
.stp[data-st="done"] .stp-n { color: var(--paper-3); }
.stp[data-st="later"] { opacity: .55; }
.stp[data-st="later"] .stp-t, .stp[data-st="end"] .stp-t { font-size: 18px; color: var(--paper-2); }
.stp[data-st="end"] .stp-n { background: transparent; color: var(--gold); box-shadow: 0 0 0 2px var(--gold) inset; }

/* tiles: one per entry, pixel-cornered */
.tiles { display: flex; flex-wrap: wrap; gap: 6px; }
.tile { position: relative; min-width: 74px; padding: 6px 7px 7px; background: var(--slab-2); border: 2px solid var(--rule-2);
  clip-path: polygon(0 3px, 3px 3px, 3px 0, calc(100% - 3px) 0, calc(100% - 3px) 3px, 100% 3px, 100% calc(100% - 3px), calc(100% - 3px) calc(100% - 3px), calc(100% - 3px) 100%, 3px 100%, 3px calc(100% - 3px), 0 calc(100% - 3px)); }
.tile-v { display: block; font: 600 12px/1.2 var(--mono); }
.tile-w { display: block; font: 400 9.5px/1.3 var(--mono); color: var(--paper-3); }
.tile-bar { display: block; height: 4px; margin-top: 5px; background: var(--rule); }
.tile-bar i { display: block; height: 100%; background: var(--paper-2); }
.tile-flag { position: absolute; top: -2px; right: -2px; font: 400 12px/1 var(--px); padding: 2px 4px 1px; background: var(--mark); color: var(--mark-ink); }
.tile.is-low { border-color: var(--mark); background: var(--mark-deep); }
.tile.is-low .tile-bar i { background: var(--mark); }
.stp[data-st="now"] .tile.is-low { animation: blink 1.2s steps(2, start) infinite; }
.tile.is-gone { border-color: var(--mark); background: var(--mark); color: var(--mark-ink); }
.tile.is-gone .tile-v { text-decoration: line-through; }
.tile.is-gone .tile-w { color: var(--mark-ink); }
.tile.is-gone .tile-bar { background: rgba(255, 255, 255, .3); } .tile.is-gone .tile-bar i { background: var(--mark-ink); }
.tile.is-me { border-color: var(--gold); }
.tile.is-open { background: transparent; border: 2px dashed var(--rule-2); clip-path: none; color: var(--paper-3); }
.tile.is-first { border: 2px solid var(--mark); color: var(--mark); background: var(--mark-deep); }
.tile.is-first .tile-w { color: var(--mark); }
.tile.is-fresh { animation: drop .5s steps(4, end); }

/* ---------- side: the slip, the tape, closed books ---------- */
.side { display: grid; gap: 14px; margin-top: 8px; }
.slip { background: var(--slab); border: 2px solid var(--rule-2); padding: 12px; }
.slip-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.slip-k { font: 400 20px/1 var(--px); }
.slip-wallet { border: 2px solid var(--rule-2); background: transparent; padding: 6px 10px; font: 600 10.5px/1 var(--mono); cursor: pointer; }
.dial { display: grid; grid-template-columns: 46px minmax(0, 1fr) 46px; border: 2px solid var(--paper-3); }
.dial-b { background: var(--slab-2); border: 0; font: 400 26px/1 var(--px); cursor: pointer; color: var(--paper); }
.dial-b:active { background: var(--rule-2); }
.dial-f { display: flex; align-items: center; justify-content: center; gap: 6px; background: var(--slate); padding: 0 8px; }
.dial-f input { width: 100%; min-width: 0; background: transparent; border: 0; color: var(--paper); text-align: right; font: 600 22px/1 var(--mono); padding: 12px 0; outline: none; }
.dial-f span { font: 400 18px/1 var(--px); color: var(--paper-2); }
.slip-proj { margin: 10px 0; font-size: 14.5px; color: var(--paper-2); min-height: 44px; }
.slip-proj b { color: var(--paper); } .slip-proj em { font-style: normal; color: var(--mark); }
.slip-go { width: 100%; border: 0; background: var(--mark); color: var(--mark-ink); font: 400 24px/1 var(--px); padding: 13px 0 11px; cursor: pointer;
  box-shadow: 0 -4px 0 rgba(22, 29, 36, .25) inset; }
.slip-go:disabled { background: var(--rule-2); color: var(--paper-2); cursor: default; }
.slip-mine { margin: 10px 0 0; font: 400 11px/1.4 var(--mono); color: var(--paper-3); }
.slip-out, .slip-claim { margin-top: 8px; width: 100%; padding: 10px; border: 2px solid var(--gold); background: transparent; color: var(--gold); font: 600 11px/1 var(--mono); cursor: pointer; }
.slip-claim { background: var(--gold); color: var(--mark-ink); }

.feed, .shut { border-top: 2px solid var(--rule-2); padding-top: 8px; }
.feed-h { display: flex; justify-content: space-between; font: 400 17px/1 var(--px); color: var(--paper-2); margin-bottom: 6px; }
.feed-list, .shut-list { list-style: none; margin: 0; padding: 0; }
.feed-list li { display: grid; grid-template-columns: 52px minmax(0, 1fr) auto; gap: 8px; padding: 7px 0; border-bottom: 1px dotted var(--rule); font-size: 13.5px; align-items: baseline; }
.feed-list li.is-new { animation: type .7s steps(7, end); }
.feed-list .fk { font: 400 14px/1 var(--px); color: var(--paper-3); text-transform: uppercase; }
.feed-list li[data-k="folded"] .fk { color: var(--mark); }
.feed-list li[data-k="last"] .fk { color: var(--gold); }
.feed-list .ft code { font-size: 11px; color: var(--paper-2); }
.feed-list .ft b { font-family: var(--mono); font-size: 12px; }
.feed-list .fw { font: 400 10px/1 var(--mono); color: var(--paper-3); }
.feed-list .quiet, .shut-list .quiet { display: block; color: var(--paper-3); font-size: 13.5px; border: 0; padding: 6px 0; }
.shut-list li { padding: 7px 0; border-bottom: 1px dotted var(--rule); font-size: 13px; color: var(--paper-2); }
.shut-list li b { color: var(--paper); font-family: var(--mono); font-size: 12px; }
.shut-list code { font-size: 10.5px; word-break: break-all; }

/* ---------- how a book runs ---------- */
.howto { margin-top: 30px; border-top: 2px solid var(--rule-2); padding-top: 18px; max-width: 820px; }
.howto-h { font: 400 30px/1 var(--px); margin: 0 0 12px; font-weight: 400; }
.howto-list { margin: 0; padding-left: 22px; display: grid; gap: 8px; color: var(--paper-2); }
.howto-list b { color: var(--paper); }
.worked { margin: 16px 0; background: var(--slab); border-left: 4px solid var(--mark); padding: 10px 12px; }
.worked-k { font: 400 16px/1 var(--px); color: var(--mark); text-transform: uppercase; letter-spacing: .04em; }
.worked p { margin: 6px 0 0; }
.howto-note { color: var(--paper-3); font-size: 14px; }
.lookup { margin-top: 14px; background: var(--slab); border: 2px solid var(--rule-2); padding: 10px; font-size: 13px; }
.lookup code { word-break: break-all; }

/* ---------- colophon ---------- */
.colophon { margin-top: 30px; border-top: 2px dashed var(--rule-2); padding-top: 14px; font-size: 13px; color: var(--paper-3); }
.colo-row { display: grid; gap: 2px; margin-bottom: 8px; }
.colo-row span { font: 400 15px/1 var(--px); text-transform: uppercase; }
.colo-row code { color: var(--paper-2); font-size: 11px; word-break: break-all; }
.colo-links { display: flex; flex-wrap: wrap; gap: 14px; margin: 10px 0; }
.colo-links a { font: 400 17px/1 var(--px); color: var(--paper-2); }
.colo-fine { margin: 0; }

/* ---------- the CA: a floating pill, a red bookmark tab at its head ---------- */
.tab { position: fixed; z-index: 30; left: 50%; transform: translateX(-50%); bottom: 132px; width: calc(100% - 28px); max-width: 640px;
  display: grid; grid-template-columns: auto minmax(0, 1fr) auto; grid-template-areas: "tk ca cp" "tk gm cp"; align-items: center; gap: 2px 10px;
  padding: 7px 7px 7px 0; background: var(--pill); border: 2px solid var(--mark); border-radius: 999px; overflow: hidden;
  box-shadow: 0 8px 24px rgba(22, 29, 36, .28), 0 0 0 4px rgba(236, 238, 231, .9); }
.tab-tk { grid-area: tk; align-self: stretch; display: grid; place-items: center; padding: 0 12px 0 16px; margin: -7px 0; background: var(--mark); color: var(--mark-ink);
  font: 400 17px/1 var(--px); letter-spacing: .03em; clip-path: polygon(0 0, 100% 0, calc(100% - 8px) 50%, 100% 100%, 0 100%); padding-right: 18px; }
.tab-ca { grid-area: ca; font: 600 9.5px/1.35 var(--mono); color: var(--pill-ink); word-break: break-all; user-select: all; -webkit-user-select: all; }
.tab-ca.is-wait { font: 400 17px/1 var(--px); color: var(--pill-dim); letter-spacing: .05em; user-select: none; -webkit-user-select: none; }
.tab-gm { grid-area: gm; font: 400 13px/1 var(--px); color: var(--pill-dim); text-decoration: none; }
.tab-copy { grid-area: cp; border: 0; border-radius: 999px; background: var(--mark); color: var(--mark-ink); font: 400 17px/1 var(--px); padding: 10px 14px 9px; cursor: pointer; text-transform: uppercase; }
.tab-copy[data-done="1"] { background: var(--gold); color: var(--mark-ink); }

.notes { position: fixed; left: 12px; top: 14px; z-index: 40; display: grid; gap: 6px; pointer-events: none; max-width: calc(100vw - 72px); }
.note { background: var(--slab-2); border: 2px solid var(--mark); padding: 8px 12px; font-size: 13.5px; }

@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: .45; } }
@keyframes drop { from { transform: translateY(-8px); opacity: 0; } to { transform: none; opacity: 1; } }
@keyframes type { from { clip-path: inset(0 100% 0 0); } to { clip-path: inset(0 0 0 0); } }

/* ---------- tablet: same column, wider measure, bigger type ---------- */
@media (min-width: 640px) {
  body { padding: 18px 28px 220px; }
  .verdict { font-size: 58px; }
  .lede-now { font-size: 19px; }
  .tile { min-width: 92px; } .tile-v { font-size: 13px; }
  .stp-t { font-size: 24px; }
  .tab-ca { font-size: 11px; }
  .side { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: start; }
  .slip { grid-column: 1 / -1; }
}

/* ---------- desktop: the stair left, the slip and tape as a column beside it ---------- */
@media (min-width: 1000px) {
  body { padding: 26px 40px 160px; }
  .verdict { font-size: 72px; }
  .ident-name { font-size: 32px; }
  .lede { max-width: 860px; margin: 22px 0 28px; }
  .lede-now { font-size: 19.5px; }
  .work { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(320px, 1fr); gap: 36px; align-items: start; }
  .side { grid-template-columns: 1fr; margin-top: 0; position: sticky; top: 18px; }
  .stp { grid-template-columns: 44px minmax(0, 1fr); gap: 0 16px; padding-bottom: 18px; }
  .stp::before { left: 21px; top: 44px; }
  .stp-n { width: 44px; height: 44px; font-size: 28px; }
  .stp-t { font-size: 28px; }
  .tile { min-width: 104px; padding: 8px 9px; } .tile-v { font-size: 14px; }
  .howto { max-width: none; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 0 36px; }
  .howto-h { grid-column: 1 / -1; }
  .howto-note, .lookup { grid-column: 1 / -1; }
  .tab { bottom: 28px; max-width: 720px; }
  .tab-ca { font-size: 12px; }
}
@media (prefers-reduced-motion: reduce) { * { animation: none !important; } }