/*
 * trust.vettedinference.com
 *
 * Self-contained stylesheet. No third-party fonts. System font stack only.
 * Matches the marketing-site moss/paper/ink palette; tone is procurement-
 * officer plain rather than marketing-warm.
 */

:root {
  --paper:       #F5F3EC;
  --paper-warm:  #EFEBDE;
  --paper-cool:  #FAFAF6;
  --ink:         #0F0F0E;
  --ink-soft:    #2A2A28;
  --ink-mute:    #5A5A56;
  --rule-soft:   #C9C5B5;
  --rule-mute:   #DAD6C7;
  --moss:        #2A4A3E;
  --moss-deep:   #1B342A;
  --moss-bright: #4A7860;
  --moss-pale:   #C9D6CC;

  --serif: Charter, "Bitstream Charter", "Sitka Text", Cambria, Georgia, serif;
  --sans:  -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono:  ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 1rem;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

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

.header {
  background: var(--paper);
  border-bottom: 1px solid var(--rule-soft);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  gap: 1rem;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--ink);
  font-weight: 600;
  font-size: 1rem;
}

.brand:hover { color: var(--moss); }

.header nav {
  display: flex;
  gap: 1.5rem;
  font-size: 0.9rem;
}

.header nav a {
  color: var(--ink-mute);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color 200ms, border-color 200ms;
}

.header nav a:hover {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

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

.hero {
  padding: 4rem 0 3rem;
  border-bottom: 1px solid var(--rule-soft);
  background: var(--paper);
}

.overline {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--moss);
  margin: 0 0 1rem 0;
}

h1 {
  font-family: var(--serif);
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin: 0 0 1.25rem 0;
  color: var(--ink);
}

.lede {
  font-size: 1.1rem;
  line-height: 1.65;
  max-width: 48rem;
  color: var(--ink-soft);
  margin: 0 0 1.5rem 0;
}

.meta {
  font-size: 0.85rem;
  color: var(--ink-mute);
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
  margin: 0;
}

.meta time {
  font-family: var(--mono);
}

/* ---- TOC nav ---- */

.toc {
  background: var(--paper-warm);
  border-bottom: 1px solid var(--rule-soft);
  padding: 1.25rem 0;
}

.toc ol {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.5rem 1.5rem;
  counter-reset: toc;
  font-size: 0.9rem;
}

.toc li {
  counter-increment: toc;
}

.toc a {
  color: var(--ink-soft);
  text-decoration: none;
  display: inline-block;
  padding: 2px 0;
}

.toc a::before {
  content: counter(toc, decimal-leading-zero) "  ";
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--ink-mute);
  margin-right: 0.4rem;
}

.toc a:hover { color: var(--moss); }

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

.section {
  padding: 3.5rem 0;
  border-bottom: 1px solid var(--rule-soft);
}

.section:nth-of-type(odd) {
  background: var(--paper);
}

.section:nth-of-type(even) {
  background: var(--paper-cool);
}

h2 {
  font-family: var(--serif);
  font-size: clamp(1.5rem, 2.4vw, 1.9rem);
  font-weight: 400;
  letter-spacing: -0.01em;
  margin: 0 0 1.5rem 0;
  color: var(--ink);
}

h3 {
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 500;
  margin: 2rem 0 0.75rem 0;
  color: var(--ink);
}

.section p {
  max-width: 56rem;
  margin: 0 0 1rem 0;
  color: var(--ink-soft);
}

.section ul, .section ol {
  margin: 0 0 1rem 0;
  padding-left: 1.5rem;
  max-width: 56rem;
}

.section li {
  margin: 0.4rem 0;
  color: var(--ink-soft);
}

/* ---- Tables ---- */

.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 1.5rem 0;
  font-size: 0.92rem;
  background: var(--paper);
  border: 1px solid var(--rule-soft);
}

.data-table th, .data-table td {
  text-align: left;
  padding: 0.7rem 0.9rem;
  vertical-align: top;
  border-bottom: 1px solid var(--rule-mute);
}

.data-table th {
  background: var(--paper-warm);
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-mute);
  border-bottom: 1px solid var(--rule-soft);
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table tr:hover {
  background: var(--paper-warm);
}

.data-table a {
  color: var(--moss);
  text-decoration: none;
  border-bottom: 1px solid var(--moss-pale);
}

.data-table a:hover {
  border-bottom-color: var(--moss);
}

.muted {
  color: var(--ink-mute);
  font-size: 0.88em;
}

/* ---- Layered DLs ---- */

.layered-dl {
  margin: 1rem 0;
}

.layered-dl dt {
  font-weight: 700;
  margin: 1.25rem 0 0.5rem 0;
  color: var(--ink);
  font-size: 1rem;
}

.layered-dl dd {
  margin: 0 0 0.75rem 0;
  padding: 0.6rem 0.9rem;
  background: var(--paper-warm);
  border-left: 2px solid var(--moss);
  font-size: 0.95rem;
  color: var(--ink-soft);
}

.layered-dl dd ul {
  margin: 0.4rem 0;
  padding-left: 1.25rem;
}

/* ---- Badges ---- */

.badge {
  display: inline-block;
  padding: 0.15rem 0.55rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  background: var(--moss);
  color: var(--paper);
  border-radius: 999px;
  margin-left: 0.5rem;
  letter-spacing: 0.04em;
}

/* ---- Key block ---- */

.key-block {
  background: var(--paper-warm);
  border: 1px solid var(--rule-soft);
  padding: 1.25rem;
  margin: 1rem 0;
}

.key-block code {
  font-family: var(--mono);
  font-size: 0.92rem;
  background: var(--paper);
  padding: 2px 6px;
  border-radius: 2px;
  border: 1px solid var(--rule-mute);
  word-break: break-all;
}

/* ---- Code + pre ---- */

code {
  font-family: var(--mono);
  font-size: 0.92em;
  background: var(--paper-warm);
  padding: 1px 5px;
  border-radius: 2px;
}

pre {
  font-family: var(--mono);
  font-size: 0.88rem;
  background: var(--paper-warm);
  padding: 1rem 1.25rem;
  border-left: 3px solid var(--moss);
  overflow-x: auto;
  white-space: pre-wrap;
  line-height: 1.5;
}

/* ---- Details ---- */

details {
  margin: 1rem 0;
  background: var(--paper-warm);
  border: 1px solid var(--rule-soft);
  border-radius: 2px;
}

details summary {
  cursor: pointer;
  padding: 0.7rem 1rem;
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--ink);
  list-style-position: outside;
}

details summary:hover {
  background: var(--paper);
}

details[open] summary {
  border-bottom: 1px solid var(--rule-soft);
}

details > *:not(summary) {
  padding: 0 1rem;
}

details dl dt {
  font-weight: 700;
  margin-top: 0.75rem;
}

details dl dd {
  margin: 0.25rem 0 0.5rem 0;
  color: var(--ink-soft);
  padding: 0;
}

/* ---- Links ---- */

a {
  color: var(--moss);
}

a:hover {
  color: var(--moss-deep);
}

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

.footer {
  background: var(--ink);
  color: rgba(245,243,236,0.75);
  padding: 2.5rem 0;
  font-size: 0.85rem;
}

.footer p {
  margin: 0.4rem 0;
}

.footer a {
  color: var(--moss-pale);
}

.footer a:hover {
  color: var(--paper);
}

/* ---- Responsive ---- */

@media (max-width: 640px) {
  .container { padding: 0 1rem; }
  .hero { padding: 2.5rem 0 2rem; }
  .section { padding: 2.5rem 0; }
  .data-table { font-size: 0.85rem; }
  .data-table th, .data-table td { padding: 0.55rem 0.6rem; }
  .toc ol { grid-template-columns: 1fr; }
}

/* ---- Print ---- */

@media print {
  .header, .toc, .footer { display: none; }
  .section { page-break-inside: avoid; padding: 1rem 0; border: none; }
  body { background: white; color: black; }
  .data-table { border: 1px solid #999; }
  a { color: black; text-decoration: underline; }
}

/* ---- Reduced motion ---- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

/* ---- Focus ---- */

a:focus-visible, summary:focus-visible {
  outline: 2px solid var(--moss);
  outline-offset: 2px;
}