:root {
  --paper: #f2f4f3;
  --paper-2: #e6eae8;
  --ink: #1f2624;
  --steel: #5b6b73;
  --rule: #c9d1ce;
  --match: #2e8b6f;
  --match-soft: #cfe6dd;
  --diff: #c9961a;
  --code-bg: #e9edeb;
  --display: "Schibsted Grotesk", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --measure: 68ch;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #161b1a;
    --paper-2: #1e2523;
    --ink: #e4e9e7;
    --steel: #93a3aa;
    --rule: #34403d;
    --match: #4fb894;
    --match-soft: #1f3a31;
    --diff: #e0b03a;
    --code-bg: #1f2725;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--display);
  font-size: 1.0625rem;
  line-height: 1.55;
}

a { color: inherit; text-decoration-color: var(--match); text-underline-offset: 0.18em; text-decoration-thickness: 2px; }
a:hover { color: var(--match); }
:focus-visible { outline: 3px solid var(--match); outline-offset: 3px; border-radius: 2px; }

code, pre, .mono { font-family: var(--mono); font-size: 0.86em; }
:not(pre) > code { background: var(--code-bg); padding: 0.1em 0.35em; border-radius: 4px; }
pre {
  background: var(--code-bg);
  border-left: 3px solid var(--match);
  padding: 1rem 1.15rem;
  overflow-x: auto;
  line-height: 1.5;
  font-size: 0.82rem;
  border-radius: 0 6px 6px 0;
}

.wrap { width: min(1120px, 100% - 2.5rem); margin-inline: auto; }

/* Header: the element tile is the mark. */
.site-head {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding-block: 1.25rem;
}
.mark { display: flex; align-items: center; gap: 0.75rem; text-decoration: none; }
.tile {
  width: 2.75rem; height: 2.75rem; border: 2px solid var(--ink); border-radius: 3px;
  display: grid; grid-template-rows: auto 1fr; padding: 2px 4px; line-height: 1;
}
.tile small { font-size: 0.55rem; font-weight: 600; }
.tile b { font-size: 1.3rem; align-self: center; letter-spacing: -0.02em; }
.mark span { font-weight: 700; font-size: 1.15rem; letter-spacing: -0.01em; white-space: nowrap; }
.site-head nav { display: flex; gap: 1.25rem; font-weight: 500; }
.site-head nav a { text-decoration: none; }
.site-head nav a[aria-current="page"] { text-decoration: underline; text-decoration-color: var(--match); }

/* Hero: one real block, one cell per transaction. */
.hero { padding-block: 2.5rem 3.5rem; display: grid; gap: 2.25rem; }
.hero h1 {
  font-size: clamp(2.3rem, 5.6vw, 4.4rem); line-height: 1.02; letter-spacing: -0.035em;
  font-weight: 800; margin: 0; max-width: 17ch;
}
.lede { font-size: 1.2rem; max-width: 56ch; color: var(--steel); margin: 0; }
.lede strong { color: var(--ink); font-weight: 600; }

.block-figure { margin: 0; }
.mosaic {
  display: flex; flex-wrap: wrap; gap: 3px; padding: 3px;
  background: var(--paper-2); border-radius: 4px;
}
.mosaic button {
  all: unset; cursor: pointer; height: 30px; border-radius: 2px;
  background: var(--rule); flex-grow: 1;
  transition: background-color 180ms ease;
}
.mosaic button.done { background: var(--match); }
.mosaic button:hover, .mosaic button:focus-visible { background: var(--ink); outline: none; }
.block-caption {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.5rem 1.5rem;
  margin-top: 0.75rem; font-size: 0.95rem; color: var(--steel);
}
.tally { font-weight: 700; color: var(--ink); font-variant-numeric: tabular-nums; }
.tally .ok { color: var(--match); }
.picked { font-family: var(--mono); font-size: 0.8rem; min-height: 1.4em; }

.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.btn {
  display: inline-block; padding: 0.7rem 1.15rem; border-radius: 4px; font-weight: 600;
  text-decoration: none; border: 2px solid var(--ink);
}
.btn.primary { background: var(--ink); color: var(--paper); }
.btn.primary:hover { background: var(--match); border-color: var(--match); color: #fff; }
.btn:hover { color: inherit; }

/* Sections */
section { padding-block: 3.25rem; border-top: 1px solid var(--rule); }
h2 { font-size: clamp(1.6rem, 3vw, 2.25rem); letter-spacing: -0.025em; line-height: 1.1; margin: 0 0 1rem; max-width: 24ch; }
h3 { font-size: 1.2rem; margin: 0 0 0.4rem; letter-spacing: -0.01em; }
p { max-width: var(--measure); }
.intro { color: var(--steel); max-width: 60ch; margin-top: 0; }

.pipeline { list-style: none; padding: 0; margin: 2rem 0 0; display: grid; gap: 0; grid-template-columns: repeat(4, 1fr); counter-reset: step; }
.pipeline li { padding: 0 1.25rem 0 0; border-top: 3px solid var(--ink); padding-top: 1rem; counter-increment: step; }
.pipeline li + li { padding-left: 1.25rem; border-left: 1px solid var(--rule); }
.pipeline li::before { content: counter(step); font-weight: 800; font-size: 2rem; display: block; line-height: 1; margin-bottom: 0.5rem; color: var(--match); }
.pipeline p { font-size: 0.97rem; color: var(--steel); margin: 0; }

.numbers { width: 100%; border-collapse: collapse; margin-top: 1.5rem; font-variant-numeric: tabular-nums; }
.numbers th, .numbers td { text-align: left; padding: 0.65rem 0.75rem 0.65rem 0; border-bottom: 1px solid var(--rule); }
.numbers th { font-weight: 600; color: var(--steel); font-size: 0.92rem; }
.numbers td.n { text-align: right; padding-right: 0; font-weight: 600; }
.numbers th.n { text-align: right; padding-right: 0; }
.numbers tr.total td { border-bottom: 3px solid var(--ink); font-weight: 800; }

.causes { display: grid; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); gap: 1.75rem 2.5rem; margin-top: 2rem; }
.causes article { border-left: 3px solid var(--diff); padding-left: 1rem; }
.causes .count { font-size: 2rem; font-weight: 800; line-height: 1; display: block; margin-bottom: 0.35rem; font-variant-numeric: tabular-nums; }
.causes p { font-size: 0.96rem; color: var(--steel); margin: 0; }

.story { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 2.5rem; align-items: start; margin-top: 1.5rem; }
.ledger { border: 1px solid var(--rule); border-radius: 4px; overflow: hidden; }
.ledger div { display: flex; justify-content: space-between; gap: 1rem; padding: 0.6rem 0.9rem; border-bottom: 1px solid var(--rule); font-variant-numeric: tabular-nums; }
.ledger div:last-child { border-bottom: 0; }
.ledger strong { font-weight: 700; }
.ledger .bug { background: color-mix(in srgb, var(--diff) 16%, transparent); }

.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr); gap: 2.5rem; align-items: start; }
.split + .split { margin-top: 3rem; }

.site-foot { padding-block: 2.5rem 3rem; border-top: 1px solid var(--rule); color: var(--steel); font-size: 0.92rem; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; }

/* Docs */
.docs { display: grid; grid-template-columns: 14rem minmax(0, 1fr); gap: 3rem; padding-block: 2rem 4rem; }
.toc { position: sticky; top: 1.25rem; align-self: start; font-size: 0.95rem; }
.toc ol { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.15rem; }
.toc a { text-decoration: none; display: block; padding: 0.3rem 0.6rem; border-left: 2px solid var(--rule); }
.toc a:hover { border-left-color: var(--match); }
.doc h1 { font-size: clamp(2rem, 4vw, 2.8rem); letter-spacing: -0.03em; margin: 0 0 0.5rem; line-height: 1.05; }
.doc h2 { margin-top: 3rem; padding-top: 1.5rem; border-top: 1px solid var(--rule); max-width: none; }
.doc h3 { margin-top: 1.75rem; }
.doc table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
.doc th, .doc td { text-align: left; padding: 0.55rem 0.75rem 0.55rem 0; border-bottom: 1px solid var(--rule); vertical-align: top; }
.doc th { color: var(--steel); font-weight: 600; }
.doc ul { max-width: var(--measure); padding-left: 1.2rem; }
.doc li { margin-bottom: 0.35rem; }
.note { border-left: 3px solid var(--diff); padding: 0.2rem 0 0.2rem 1rem; color: var(--steel); max-width: var(--measure); }

@media (max-width: 820px) {
  .pipeline { grid-template-columns: 1fr 1fr; row-gap: 1.75rem; }
  .pipeline li:nth-child(3) { padding-left: 0; border-left: 0; }
  .story, .split { grid-template-columns: 1fr; }
  .docs { grid-template-columns: 1fr; gap: 1.5rem; }
  .toc { position: static; }
  .toc ol { grid-template-columns: 1fr 1fr; }
  .mosaic button { height: 22px; }
}

@media (max-width: 520px) {
  .pipeline { grid-template-columns: 1fr; }
  .pipeline li + li { padding-left: 0; border-left: 0; }
  .site-head { flex-wrap: wrap; }
  .site-head nav { gap: 0.9rem; font-size: 0.95rem; flex-wrap: wrap; }
  .mosaic { gap: 2px; }
  .mosaic button { height: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  .mosaic button { transition: none; }
}

.subhead { margin-top: 3rem; }