/* Hedgerouter — a risk memo, not a landing page.
   Principle: nothing here is decoration. Every rule, number and label carries
   information. No cards, no shadows, no gradients; radius only on controls. */

:root {
  --paper: #f6f7f5;
  --paper-2: #eceee9;
  --ink: #16181b;
  --ink-2: #5a6067;
  --rule: #d2d5cf;
  --signal: #17456e;

  --sans: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --max: 1080px;
  --pad: max(24px, calc((100% - var(--max)) / 2));
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16.5px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { font-weight: 600; }
p { margin: 0; }

a { color: inherit; }

code, pre { font-family: var(--mono); }

code {
  font-size: .88em;
  background: var(--paper-2);
  padding: 1px 4px;
}

pre code { background: none; padding: 0; font-size: inherit; }

/* ---------- nav ---------- */
.nav {
  max-width: var(--max);
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--rule);
}

.brand { display: flex; align-items: center; gap: 9px; text-decoration: none; }

/* the mark is a traced SVG used as a mask, so it takes the text colour */
.mark {
  display: block;
  flex: none;
  width: 28px;
  height: 17px;
  background: currentColor;
  -webkit-mask: url(/assets/mark.svg) center / contain no-repeat;
  mask: url(/assets/mark.svg) center / contain no-repeat;
}

.brand-word { font-weight: 600; font-size: 17px; }

.nav-links {
  display: flex;
  align-items: baseline;
  gap: 24px;
  font-size: 14.5px;
  color: var(--ink-2);
}

.nav-links a { text-decoration: none; }
.nav-links a:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; }

/* ---------- hero ---------- */
.hero {
  padding: 92px var(--pad) 84px;
}

.standfirst {
  font-size: 15px;
  color: var(--ink-2);
  margin-bottom: 20px;
}

h1 {
  margin: 0 0 26px;
  max-width: 21ch;
  font-size: clamp(36px, 6.2vw, 68px);
  line-height: 1.02;
  letter-spacing: -0.024em;
}

/* a short lede wants a tighter measure than a paragraph: 64ch on two lines reads as a
   leftover column width rather than a decision */
.lede {
  max-width: 54ch;
  font-size: 19px;
  line-height: 1.52;
  color: var(--ink-2);
  margin-bottom: 32px;
}

.cta-row { display: flex; flex-wrap: wrap; gap: 10px; }

.btn {
  display: inline-block;
  border-radius: 2px;
  padding: 11px 18px;
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  border: 1px solid var(--ink);
}

.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { background: #000; }

.btn-ghost { color: var(--ink); }
.btn-ghost:hover { background: var(--paper-2); }

/* ---------- the run, and the spec beside it ---------- */
.band {
  background: var(--paper-2);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 44px var(--pad);
}

.run-band {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  gap: 52px;
  align-items: start;
}

.run, .spec { min-width: 0; }

.caption {
  font-size: 13px;
  color: var(--ink-2);
  margin-bottom: 10px;
}

.run pre {
  margin: 0;
  padding: 18px 20px;
  overflow-x: auto;
  background: #fff;
  border: 1px solid var(--rule);
  font-size: 12.6px;
  line-height: 1.95;
  color: var(--ink-2);
}

/* the prompt and the figures are the only marked-up characters in the block */
.run .p { color: var(--ink); }
.run .n { color: var(--ink); font-weight: 500; }

.section .run { margin-bottom: 32px; max-width: 78ch; }

.spec { margin: 0; font-size: 14.5px; }

.spec div {
  display: grid;
  grid-template-columns: 74px 1fr;
  gap: 14px;
  padding: 9px 0;
  border-top: 1px solid var(--rule);
}

.spec div:last-child { border-bottom: 1px solid var(--rule); }

.spec dt { color: var(--ink-2); }
.spec dd { margin: 0; }

/* ---------- sections ---------- */
.section { padding: 84px var(--pad); }
.section + .section { border-top: 1px solid var(--rule); }

.section h2 {
  margin: 0 0 12px;
  max-width: 30ch;
  font-size: clamp(23px, 2.8vw, 32px);
  line-height: 1.16;
  letter-spacing: -0.016em;
}

.sub {
  max-width: 62ch;
  color: var(--ink-2);
  margin-bottom: 40px;
}

.note {
  margin-top: 30px;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
  max-width: 78ch;
  font-size: 14.5px;
  color: var(--ink-2);
}

.note a { text-decoration-thickness: 1px; text-underline-offset: 3px; color: var(--signal); }

/* the four facts: a claim and its consequence, ruled, not numbered —
   they are simultaneous, not a sequence */
.facts { margin: 0; }

.facts div {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.7fr);
  gap: 40px;
  padding: 20px 0;
  border-top: 1px solid var(--rule);
}

.facts div:last-child { border-bottom: 1px solid var(--rule); }

.facts dt { font-weight: 500; }
.facts dd { margin: 0; color: var(--ink-2); }

/* the pipeline is a real sequence, so it is numbered */
.steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  column-gap: 40px;
}

.steps li {
  counter-increment: step;
  padding: 16px 0 22px;
  border-top: 1px solid var(--rule);
}

.steps li::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--ink-2);
}

.steps h3 { margin: 4px 0 6px; font-size: 17px; }
.steps p { font-size: 14.5px; color: var(--ink-2); }

/* ---------- tables ---------- */
table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

th, td {
  padding: 14px 20px 14px 0;
  vertical-align: top;
  border-top: 1px solid var(--rule);
}

tbody tr:last-child td { border-bottom: 1px solid var(--rule); }

th {
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-2);
  border-top: 0;
  padding-top: 0;
}

td { font-size: 15px; }
td:first-child { font-weight: 500; padding-right: 32px; }
td:last-child, th:last-child { padding-right: 0; }

thead th:nth-child(3) { width: 34%; }
thead th:last-child { width: 15%; white-space: nowrap; }

.status thead th:nth-child(3) { width: auto; }
.status thead th:last-child { width: 30%; }
.status td:first-child { font-weight: 400; }

td:last-child { color: var(--ink-2); }
.status td:last-child { white-space: nowrap; }
.status td code { white-space: nowrap; }

/* ---------- close ---------- */
.close {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 28px;
  padding-top: 68px;
  padding-bottom: 68px;
  border-bottom: 0;
}

.close h2 {
  margin: 0 0 8px;
  max-width: 26ch;
  font-size: clamp(23px, 2.8vw, 32px);
  line-height: 1.16;
  letter-spacing: -0.016em;
}

.close p { font-size: 15px; color: var(--ink-2); }

/* ---------- footer ---------- */
.foot {
  max-width: var(--max);
  margin: 0 auto;
  padding: 24px 24px 56px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px 32px;
  justify-content: space-between;
  font-size: 13.5px;
  color: var(--ink-2);
}

.foot b { font-weight: 600; color: var(--ink); }
.foot p { max-width: 70ch; }

.foot-links { display: flex; gap: 20px; }
.foot-links a { text-underline-offset: 3px; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  /* minmax(0,…) not 1fr: a bare 1fr takes the <pre>'s min-content as its
     minimum and blows the page out horizontally */
  .run-band { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .facts div { grid-template-columns: 1fr; gap: 6px; }
  .nav-links a:not(:last-child) { display: none; }
}

@media (max-width: 620px) {
  body { font-size: 16px; }
  .hero { padding-top: 60px; padding-bottom: 56px; }
  .section { padding-top: 60px; padding-bottom: 60px; }
  .steps { grid-template-columns: 1fr; }
  .spec div { grid-template-columns: 68px 1fr; }
  .lede { font-size: 17px; }
  .run pre { font-size: 11.4px; padding: 14px; }

  /* a two-column table at this width is a stack of label/value pairs */
  thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
  tr { display: block; border-top: 1px solid var(--rule); padding: 14px 0; }
  td { display: block; border: 0; padding: 0; }
  td:first-child { padding-right: 0; margin-bottom: 4px; }
  td + td { font-size: 14.5px; }

  /* a stacked row of bare values loses the column it came from, so the
     wider table carries its own labels below 620px */
  td[data-label]::before {
    content: attr(data-label);
    display: block;
    margin-top: 10px;
    font-size: 12.5px;
    color: var(--ink-2);
  }
  tbody tr:last-child { border-bottom: 1px solid var(--rule); }
  tbody tr:last-child td { border-bottom: 0; }
  .status td:last-child { white-space: normal; }
}