:root {
  --paper: #f4efe6;
  --ink: #1c1914;
  --rule: #c4bbaa;
  --muted: #5c564c;
  --sans: system-ui, "Segoe UI", sans-serif;
  --mono: ui-monospace, "Cascadia Mono", Consolas, monospace;
  --balanced: #1f6b3a;
  --fail: #9b1d1d;
  --measure: 42rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #161410;
    --ink: #efe8dc;
    --rule: #3d372d;
    --muted: #b4ab9c;
  }
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.5;
}

body {
  min-height: 100vh;
}

a {
  color: inherit;
}

.wrap {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}

header.mast {
  border-bottom: 1px solid var(--rule);
  padding-bottom: 1rem;
  margin-bottom: 2rem;
}

header.mast nav {
  display: flex;
  gap: 1rem;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

h1 {
  font-size: 2.4rem;
  margin: 0 0 0.4rem;
}

h2 {
  font-size: 1.25rem;
  margin: 2.25rem 0 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--rule);
}

h3 {
  font-size: 1rem;
  margin: 1.25rem 0 0.4rem;
}

p {
  margin: 0 0 1rem;
}

.tagline {
  font-size: 1.15rem;
  margin-bottom: 1rem;
}

.lede {
  max-width: 38rem;
}

.columns {
  display: grid;
  gap: 1rem;
  margin: 1rem 0 1.5rem;
}

@media (min-width: 640px) {
  .columns.three {
    grid-template-columns: 1fr 1fr 1fr;
  }
}

.col {
  border-top: 1px solid var(--rule);
  padding-top: 0.6rem;
}

.col h3 {
  margin-top: 0;
}

.mono,
code,
pre {
  font-family: var(--mono);
  font-size: 0.86em;
}

pre {
  border: 1px solid var(--rule);
  padding: 0.85rem 1rem;
  overflow: auto;
  background: transparent;
}

.flow {
  width: 100%;
  height: auto;
  display: block;
  margin: 1rem 0;
}

.flow text {
  font-family: var(--sans);
  fill: currentColor;
}

.flow .box {
  fill: none;
  stroke: currentColor;
}

.flow .arrow {
  stroke: currentColor;
  fill: none;
}

.seal {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1px solid currentColor;
  padding: 0.15rem 0.45rem;
}

.seal.ok {
  color: var(--balanced);
}

.seal.bad {
  color: var(--fail);
}

.claims {
  font-size: 0.92rem;
  color: var(--muted);
}

.claims li {
  margin-bottom: 0.35rem;
}

footer.colophon {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  font-size: 0.85rem;
  color: var(--muted);
}

footer.colophon p {
  margin-bottom: 0.35rem;
}

.steps ol {
  padding-left: 1.2rem;
}

.steps li {
  margin-bottom: 0.75rem;
}

.out {
  border-left: 2px solid var(--rule);
  padding-left: 0.75rem;
  margin: 0.5rem 0 1rem;
}

.wrap.wide {
  max-width: 64rem;
}

.banner {
  font-family: var(--mono);
  font-size: clamp(1.4rem, 4vw, 2.4rem);
  letter-spacing: 0.04em;
  line-height: 1.15;
  padding: 1rem 0 1.25rem;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 1.25rem;
}

.banner.ok {
  color: var(--balanced);
}

.banner.bad {
  color: var(--fail);
}

.switch {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.switch button {
  font-family: var(--sans);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--rule);
  padding: 0.35rem 0.7rem;
}

.switch button[aria-pressed="true"] {
  border-color: var(--ink);
}

.board {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 860px) {
  .board {
    grid-template-columns: 1fr 1fr;
  }
}

.card {
  border: 1px solid var(--rule);
  padding: 0.7rem 0.8rem;
  margin: 0 0 0.6rem;
}

.card .meta {
  font-family: var(--mono);
  font-size: 0.8rem;
}

.chain {
  position: relative;
  padding-left: 0.85rem;
  border-left: 1px solid var(--rule);
}

.gap {
  border-style: dashed;
  color: var(--fail);
  min-height: 4.5rem;
}

.findings {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.findings th,
.findings td {
  text-align: left;
  border-top: 1px solid var(--rule);
  padding: 0.4rem 0.35rem;
  vertical-align: top;
}

.findings th {
  font-weight: 600;
}