/* ASSAY — shared styles
   A JourdanLabs verification practice.
   Type: Instrument Serif (display), IBM Plex Sans (body), IBM Plex Mono (figures) */

@import url('https://fonts.googleapis.com/css2?family=Instrument+Serif:ital@0;1&family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
  --ground: #FDFDFC;
  --ink: #0F0E10;
  --ink-2: #2A272E;
  --mute: #6B6870;
  --mute-2: #9B9899;
  --rule: #1A171C;
  --rule-soft: #E6E2DC;
  --purple: #3A1D6E;
  --purple-ink: #2A1450;
  --blue: #1E4FD9;
  --blue-ink: #143AA8;
  --paper: #F5F1EA;      /* subtle warm secondary ground for exhibit blocks */
  --stamp: #B33A2A;       /* certified/refused stamp red — used sparingly */

  --serif: 'Instrument Serif', 'Times New Roman', Times, serif;
  --sans: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, Menlo, monospace;

  --page-max: 1080px;
  --gutter: 40px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--ground);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--blue); }

.mono, code, kbd, samp { font-family: var(--mono); font-feature-settings: 'zero' 1, 'ss01' 1; }

/* ——— header ——— */
.masthead {
  border-bottom: 1px solid var(--rule);
  background: var(--ground);
}
.masthead-inner {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 20px var(--gutter) 16px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 40px;
}
.wordmark {
  font-family: var(--serif);
  font-size: 34px;
  line-height: 1;
  letter-spacing: 0.01em;
  color: var(--ink);
  text-decoration: none;
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
}
.wordmark .wordmark-dot {
  display: inline-block;
  width: 8px; height: 8px;
  background: var(--purple);
  transform: translateY(-2px);
  border-radius: 1px;
}
.wordmark-sub {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--mute);
  letter-spacing: 0.02em;
  margin-top: 6px;
  text-transform: none;
}
.nav {
  display: flex;
  gap: 28px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.01em;
  padding-bottom: 6px;
}
.nav a {
  text-decoration: none;
  color: var(--ink-2);
  padding-bottom: 4px;
  border-bottom: 1px solid transparent;
}
.nav a:hover { color: var(--blue); }
.nav a.current {
  color: var(--ink);
  border-bottom-color: var(--purple);
}
.nav .nav-num {
  color: var(--mute-2);
  margin-right: 4px;
}

/* ——— page frame ——— */
.page {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 72px var(--gutter) 96px;
}
.page-narrow {
  max-width: 780px;
  margin: 0 auto;
  padding: 72px var(--gutter) 96px;
}

.kicker {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--mute);
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 28px;
}
.kicker::before {
  content: "";
  display: inline-block;
  width: 22px;
  height: 1px;
  background: var(--ink);
}
.kicker .k-file { color: var(--purple); }

/* ——— display ——— */
h1.display, .display {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(56px, 8vw, 108px);
  line-height: 0.98;
  letter-spacing: -0.015em;
  margin: 0 0 32px;
  color: var(--ink);
}
h1.display em, .display em {
  font-style: italic;
  color: var(--purple);
}
h1.display .u, .display .u {
  color: var(--blue);
  font-style: italic;
}

h2.section {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(34px, 4vw, 52px);
  line-height: 1.05;
  letter-spacing: -0.01em;
  margin: 0 0 20px;
}
h2.section .sec-num {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--mute);
  letter-spacing: 0.04em;
  vertical-align: 8px;
  margin-right: 10px;
  font-style: normal;
}

h3.sub {
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--ink);
  margin: 0 0 14px;
}

.lede {
  font-family: var(--serif);
  font-size: clamp(24px, 2.4vw, 30px);
  line-height: 1.28;
  color: var(--ink-2);
  margin: 0 0 40px;
  max-width: 42ch;
}

p { margin: 0 0 16px; max-width: 68ch; }
.body-lg p { font-size: 17px; line-height: 1.6; }
.dim { color: var(--mute); }

/* ——— rules ——— */
.rule { border-top: 1px solid var(--rule); margin: 40px 0; }
.rule-soft { border-top: 1px solid var(--rule-soft); margin: 40px 0; }
.rule-heavy { border-top: 2px solid var(--ink); margin: 40px 0; }

/* ——— tables ——— */
table.ledger {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--sans);
  font-size: 15px;
}
table.ledger th, table.ledger td {
  text-align: left;
  padding: 18px 12px 18px 0;
  border-top: 1px solid var(--rule-soft);
  vertical-align: top;
}
table.ledger tr:first-child th,
table.ledger tr:first-child td { border-top: 1px solid var(--ink); }
table.ledger tr:last-child td { border-bottom: 1px solid var(--ink); }
table.ledger th {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  color: var(--mute);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding-bottom: 10px;
  padding-top: 10px;
}
table.ledger td.num, table.ledger th.num {
  font-family: var(--mono);
  text-align: right;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
table.ledger td .svc {
  font-family: var(--serif);
  font-size: 22px;
  line-height: 1.15;
  display: block;
  margin-bottom: 4px;
}
table.ledger td .svc-desc {
  color: var(--mute);
  font-size: 14px;
  max-width: 44ch;
}
table.ledger a.svc-link {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--rule-soft);
}
table.ledger a.svc-link:hover { border-bottom-color: var(--purple); color: var(--purple); }

/* two-column definition list */
dl.spec {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 14px 32px;
  margin: 0;
  border-top: 1px solid var(--rule);
  padding-top: 22px;
}
dl.spec dt {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--mute);
  padding-top: 3px;
}
dl.spec dd {
  margin: 0;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--rule-soft);
  font-size: 15px;
  line-height: 1.55;
}
dl.spec dd:last-of-type { border-bottom: 1px solid var(--rule); }
dl.spec dd .price {
  font-family: var(--mono);
  font-size: 17px;
  font-variant-numeric: tabular-nums;
}

/* ——— exhibit / receipt block ——— */
.receipt {
  background: var(--paper);
  border: 1px solid #D9D3C9;
  padding: 24px 26px;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.55;
  color: var(--ink);
  white-space: pre;
  overflow-x: auto;
  position: relative;
}
.receipt .r-head {
  border-bottom: 1px dashed #C6BFB2;
  padding-bottom: 10px;
  margin-bottom: 14px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--ink-2);
}
.receipt .r-key { color: var(--mute); }
.receipt .r-hash { color: var(--purple-ink); }
.receipt .r-fail { color: var(--stamp); }
.receipt .r-pass { color: #1E6B3A; }
.receipt .r-file { color: var(--blue-ink); }

.stamp {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 5px 10px 4px;
  border: 1.5px solid currentColor;
  color: var(--stamp);
  transform: rotate(-3deg);
  line-height: 1;
}
.stamp.pass { color: #1E6B3A; }
.stamp.mono { transform: none; }

/* ——— CTA line ——— */
.cta-line {
  border-top: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  padding: 28px 0;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 24px;
  flex-wrap: wrap;
  margin-top: 56px;
}
.cta-line .cta-text {
  font-family: var(--serif);
  font-size: clamp(28px, 3.4vw, 40px);
  line-height: 1.1;
  letter-spacing: -0.01em;
}
.cta-line .cta-text em { color: var(--purple); font-style: italic; }
.cta-line a.cta-btn {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ground);
  background: var(--ink);
  padding: 14px 22px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  transition: background 120ms;
}
.cta-line a.cta-btn:hover { background: var(--purple); }
.cta-line a.cta-btn .arrow { font-family: var(--sans); font-weight: 400; }

/* ——— footer ——— */
.foot {
  border-top: 1px solid var(--rule);
  margin-top: 80px;
}
.foot-inner {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 32px var(--gutter) 40px;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 40px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--mute);
}
.foot-inner h4 {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
  margin: 0 0 10px;
  font-weight: 500;
}
.foot-inner a { color: var(--ink-2); text-decoration: none; display: block; padding: 3px 0; }
.foot-inner a:hover { color: var(--blue); }
.foot-legal {
  border-top: 1px solid var(--rule-soft);
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 16px var(--gutter);
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--mute-2);
  gap: 20px;
  flex-wrap: wrap;
}

/* ——— utilities ——— */
.two-col {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 40px;
  align-items: start;
}
.two-col > .col-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--mute);
  padding-top: 8px;
  position: sticky;
  top: 20px;
}
.stack > * + * { margin-top: 22px; }

ul.plain { list-style: none; padding: 0; margin: 0; }
ul.plain li {
  padding: 12px 0;
  border-top: 1px solid var(--rule-soft);
  display: grid;
  grid-template-columns: 32px 1fr auto;
  gap: 16px;
  align-items: baseline;
}
ul.plain li:last-child { border-bottom: 1px solid var(--rule-soft); }
ul.plain li .idx {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--mute);
}
ul.plain li .meta {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--mute);
}

/* form */
.form-grid {
  display: grid;
  gap: 20px;
  border-top: 1px solid var(--ink);
  padding-top: 28px;
}
.form-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 24px;
  align-items: baseline;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--rule-soft);
}
.form-row label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--mute);
  padding-top: 8px;
}
.form-row label .req { color: var(--stamp); margin-left: 4px; }
.form-row input[type=text],
.form-row input[type=email],
.form-row input[type=url],
.form-row select,
.form-row textarea {
  width: 100%;
  font-family: var(--sans);
  font-size: 16px;
  color: var(--ink);
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--rule);
  padding: 10px 0;
  border-radius: 0;
  -webkit-appearance: none;
  outline: none;
}
.form-row textarea {
  min-height: 120px;
  resize: vertical;
  border: 1px solid var(--rule-soft);
  padding: 12px;
}
.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  border-color: var(--purple);
}
.form-row .hint {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--mute);
  margin-top: 6px;
}
.submit-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding-top: 24px;
  flex-wrap: wrap;
}
button.submit {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ground);
  background: var(--ink);
  padding: 16px 28px;
  border: none;
  cursor: pointer;
}
button.submit:hover { background: var(--purple); }

/* small screens */
@media (max-width: 720px) {
  :root { --gutter: 22px; }
  .masthead-inner { flex-direction: column; align-items: flex-start; gap: 14px; padding-bottom: 12px; }
  .nav { flex-wrap: wrap; gap: 16px; padding-bottom: 0; }
  .foot-inner { grid-template-columns: 1fr; gap: 24px; }
  .two-col { grid-template-columns: 1fr; gap: 12px; }
  .two-col > .col-label { position: static; }
  dl.spec { grid-template-columns: 1fr; gap: 6px 0; }
  dl.spec dt { padding-top: 14px; }
  dl.spec dd { padding-bottom: 14px; }
  .form-row { grid-template-columns: 1fr; gap: 8px; }
  ul.plain li { grid-template-columns: 28px 1fr; }
  ul.plain li .meta { grid-column: 2; }
  table.ledger td .svc { font-size: 18px; }
  table.ledger td .svc-desc { display: none; }
}