/* Priming Labs LLC — site styles
   Design system: calibrated measurement.
   The graduated tick scale is the signature device, echoing the 0-10
   intensity scale used throughout the product. */

@import url('https://fonts.googleapis.com/css2?family=Archivo:wght@500;600;700&family=IBM+Plex+Mono:wght@400;500&family=Source+Serif+4:ital,opsz,wght@0,8..60,400;0,8..60,600;1,8..60,400&display=swap');

:root {
  --ink:        #14262B;
  --ink-soft:   #45585E;
  --ink-faint:  #7C8C91;
  --paper:      #F1F4F3;
  --surface:    #FFFFFF;
  --accent:     #1F6F5C;
  --signal:     #B07C1E;
  --rule:       #C7D2CE;
  --rule-faint: #DFE6E3;

  --display: 'Archivo', system-ui, sans-serif;
  --body:    'Source Serif 4', Georgia, serif;
  --mono:    'IBM Plex Mono', ui-monospace, monospace;

  --measure: 34rem;
  --gutter: clamp(1.25rem, 5vw, 4rem);
}

*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.65;
  font-optical-sizing: auto;
}

.wrap {
  max-width: 62rem;
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ---- Signature: graduated tick scale ---- */

.scale {
  display: block;
  width: 100%;
  height: 26px;
  overflow: visible;
}
.scale line { stroke: var(--rule); stroke-width: 1; }
.scale .major { stroke: var(--ink); stroke-width: 1.25; }
.scale .baseline { stroke: var(--rule); }
.scale text {
  font-family: var(--mono);
  font-size: 9px;
  fill: var(--ink-faint);
  letter-spacing: 0.06em;
}

@media (prefers-reduced-motion: no-preference) {
  .scale .tick-anim {
    transform-origin: left center;
    animation: sweep 900ms cubic-bezier(.2,.7,.3,1) both;
  }
  @keyframes sweep {
    from { transform: scaleX(0); }
    to   { transform: scaleX(1); }
  }
}

/* ---- Header ---- */

.masthead {
  padding: 2rem 0 0;
}
.wordmark {
  font-family: var(--display);
  font-weight: 700;
  font-size: 0.9375rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
  display: inline-block;
}
.wordmark span { color: var(--accent); }

/* ---- Hero ---- */

.hero { padding: clamp(3rem, 9vw, 6.5rem) 0 0; }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 1.5rem;
}

h1 {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(2.25rem, 6.5vw, 4rem);
  line-height: 1.04;
  letter-spacing: -0.025em;
  margin: 0;
  max-width: 20ch;
}

.lede {
  font-size: clamp(1.125rem, 2.2vw, 1.3125rem);
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: var(--measure);
  margin: 1.75rem 0 0;
}

.hero .scale { margin-top: clamp(2.5rem, 6vw, 4rem); }

/* ---- Sections ---- */

section { padding: clamp(3rem, 7vw, 5rem) 0; }

.section-label {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1.25rem;
}

h2 {
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(1.5rem, 3.2vw, 2rem);
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin: 0 0 1.25rem;
  max-width: 24ch;
}

section p { max-width: var(--measure); margin: 0 0 1.1rem; }
section p:last-child { margin-bottom: 0; }

.cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(11.5rem, 1fr));
  gap: clamp(1.75rem, 3vw, 2.5rem);
  margin-top: 2rem;
}
@media (max-width: 34rem) {
  .cols { grid-template-columns: 1fr; }
}
.col h3 {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.01em;
  margin: 0 0 0.5rem;
}
.col p { font-size: 0.9875rem; color: var(--ink-soft); margin: 0; }
.col .rule {
  height: 2px;
  background: var(--ink);
  width: 1.75rem;
  margin-bottom: 0.9rem;
}

/* ---- Limits panel ---- */

.limits {
  background: var(--surface);
  border-top: 2px solid var(--ink);
  padding: clamp(2rem, 5vw, 3rem);
  margin: 0;
}
.limits h2 { margin-bottom: 1rem; }
.limits p { color: var(--ink-soft); }
.limits strong { color: var(--ink); font-weight: 600; }

/* ---- Contact ---- */

.contact dl {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.4rem 2rem;
  margin: 1.5rem 0 0;
  font-size: 0.9875rem;
}
.contact dt {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  padding-top: 0.25rem;
}
.contact dd { margin: 0; }

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { color: var(--ink); }
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---- Footer ---- */

footer {
  border-top: 1px solid var(--rule);
  margin-top: clamp(3rem, 7vw, 5rem);
  padding: 2rem 0 3.5rem;
  font-size: 0.875rem;
  color: var(--ink-faint);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 2rem;
  align-items: baseline;
  justify-content: space-between;
}
.footer-links { display: flex; gap: 1.5rem; flex-wrap: wrap; }
footer a { color: var(--ink-soft); }

/* ---- Long-form document pages ---- */

.doc { padding-top: 2.5rem; }

.doc-head { max-width: var(--measure); }
.doc-head h1 { font-size: clamp(1.875rem, 4.5vw, 2.75rem); max-width: none; }

.doc-meta {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  margin: 1.25rem 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.5rem;
}

.doc-body {
  max-width: var(--measure);
  margin-top: 2.5rem;
  padding-bottom: 1rem;
}
.doc-body h2 {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.1875rem;
  letter-spacing: 0;
  margin: 2.75rem 0 0.85rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule-faint);
  max-width: none;
}
.doc-body h2:first-child { margin-top: 0; border-top: 0; padding-top: 0; }
.doc-body h3 {
  font-family: var(--display);
  font-weight: 600;
  font-size: 0.9375rem;
  letter-spacing: 0.02em;
  margin: 1.75rem 0 0.6rem;
}
.doc-body p, .doc-body li { max-width: none; }
.doc-body ul, .doc-body ol { padding-left: 1.25rem; margin: 0 0 1.1rem; }
.doc-body li { margin-bottom: 0.45rem; }
.doc-body hr { border: 0; border-top: 1px solid var(--rule); margin: 2.5rem 0; }
.doc-body strong { font-weight: 600; }
.doc-body em { color: var(--ink-soft); }

.doc-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0 1.5rem;
  font-size: 0.9375rem;
}
.doc-body th {
  text-align: left;
  font-family: var(--mono);
  font-weight: 500;
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  border-bottom: 1px solid var(--ink);
  padding: 0 0.75rem 0.5rem 0;
}
.doc-body td {
  border-bottom: 1px solid var(--rule-faint);
  padding: 0.65rem 0.75rem 0.65rem 0;
  vertical-align: top;
}

.archived {
  background: var(--surface);
  border-left: 3px solid var(--signal);
  padding: 0.9rem 1.1rem;
  margin: 0 0 2rem;
  font-size: 0.9375rem;
  color: var(--ink-soft);
  max-width: var(--measure);
}

.placeholder {
  background: #FBF0D8;
  border-bottom: 1px solid var(--signal);
  color: #6B4A05;
  padding: 0 0.2em;
  font-family: var(--mono);
  font-size: 0.85em;
}

.backlink {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  display: inline-block;
  margin-top: 1.5rem;
}
.backlink::before { content: "\2190"; margin-right: 0.5em; }