/* ============================================================
   kaim-fed.css — Helm Meaning Layer design system v2
   Aligned to KAiM Web Style Guide (May 18, 2026).
   Audit-first AI governance brand. Institutional, evidence-led.
============================================================ */

/* ─── Tokens (per style guide §6, §7) ─── */
:root {
  /* Core color tokens */
  --color-authority-navy: #071B33;
  --color-deep-ink: #101820;
  --color-regulatory-blue: #155E9F;
  --color-assurance-teal: #007C89;
  --color-progress-green: #3F7D20;
  --color-slate-700: #3F4A56;
  --color-slate-500: #6B7785;
  --color-slate-300: #CBD5DF;
  --color-slate-100: #E7ECF1;
  --color-paper: #F7F8FA;
  --color-white: #FFFFFF;
  --color-amber-risk: #A66A00;
  --color-red-control: #B42318;

  /* Typography */
  --font-sans: "Inter", "IBM Plex Sans", "Source Sans 3", Arial, sans-serif;
  --font-serif: "IBM Plex Serif", Georgia, "Times New Roman", serif;
  --font-mono: "IBM Plex Mono", "SF Mono", monospace;
}

/* ─── Reset + base (per style guide §23) ─── */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body {
  background: var(--color-white);
  color: var(--color-deep-ink);
  font-family: var(--font-sans);
  font-size: 18px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a {
  color: var(--color-regulatory-blue);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}
a:hover { text-decoration-thickness: 2px; }
img { max-width: 100%; height: auto; }

/* ─── Container (style guide §23: width: min(100% - 32px, 1240px)) ─── */
.container {
  width: min(100% - 32px, 1240px);
  margin-inline: auto;
}
.container-narrow {
  width: min(100% - 32px, 820px);
  margin-inline: auto;
}

/* ─── Header / Nav ─── */
.site-header {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-slate-300);
  padding: 18px 0;
}
.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 32px;
}
.brand {
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-authority-navy);
  letter-spacing: -0.005em;
  text-decoration: none;
}
.brand:hover { text-decoration: none; }
.brand small {
  font-weight: 400;
  font-size: 12px;
  color: var(--color-slate-700);
  margin-left: 8px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.nav { display: flex; gap: 28px; font-size: 15px; }
.nav a {
  color: var(--color-deep-ink);
  text-decoration: none;
  padding-bottom: 4px;
  font-weight: 500;
}
.nav a:hover { color: var(--color-regulatory-blue); }
.nav a.active {
  color: var(--color-authority-navy);
  border-bottom: 2px solid var(--color-regulatory-blue);
}

/* ─── Sections (style guide §8: 80px desktop / 48px mobile) ─── */
.section {
  padding-block: 48px;
}
@media (min-width: 768px) {
  .section { padding-block: 80px; }
}
.section.paper { background: var(--color-paper); }
.section.navy { background: var(--color-authority-navy); color: var(--color-white); }
.section.navy h2,
.section.navy h3 { color: var(--color-white); }
.section.navy a { color: var(--color-white); }

/* ─── Page head (sub-hero) ─── */
.page-head {
  background: var(--color-paper);
  border-bottom: 1px solid var(--color-slate-300);
  padding: 56px 0 40px;
}
.crumb {
  font-size: 13px;
  color: var(--color-slate-700);
  margin-bottom: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.crumb a { color: var(--color-slate-700); }

/* ─── Hero (homepage only, style guide §10) ─── */
.hero {
  background: var(--color-paper);
  border-bottom: 1px solid var(--color-slate-300);
  padding: 64px 0 64px;
}
@media (min-width: 1024px) {
  .hero { padding: 96px 0 80px; }
}
.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-assurance-teal);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 18px;
}
.hero h1 {
  font-family: var(--font-sans);
  font-size: 38px;
  font-weight: 600;
  color: var(--color-authority-navy);
  line-height: 1.15;
  max-width: 22ch;
  margin-bottom: 18px;
}
@media (min-width: 1024px) {
  .hero h1 { font-size: 56px; }
}
.hero .dek {
  font-size: 18px;
  color: var(--color-deep-ink);
  max-width: 62ch;
  margin-bottom: 28px;
  line-height: 1.5;
}
@media (min-width: 1024px) {
  .hero .dek { font-size: 20px; }
}

/* ─── Typography (style guide §7 type scale) ─── */
h1 {
  font-family: var(--font-sans);
  font-size: 34px;
  font-weight: 600;
  color: var(--color-authority-navy);
  line-height: 1.2;
  margin-bottom: 12px;
}
@media (min-width: 1024px) {
  h1 { font-size: 44px; }
}
h2 {
  font-family: var(--font-sans);
  font-size: 28px;
  font-weight: 600;
  color: var(--color-authority-navy);
  margin: 56px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-slate-300);
  line-height: 1.25;
}
@media (min-width: 1024px) {
  h2 { font-size: 32px; }
}
h2.no-rule { border-bottom: none; padding-bottom: 0; }
h2:first-child { margin-top: 0; }
h3 {
  font-family: var(--font-sans);
  font-size: 20px;
  font-weight: 600;
  color: var(--color-authority-navy);
  margin: 32px 0 8px;
  line-height: 1.3;
}
@media (min-width: 1024px) {
  h3 { font-size: 22px; }
}
h4 {
  font-family: var(--font-sans);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-slate-700);
  font-weight: 600;
  margin-bottom: 12px;
}
p { margin-bottom: 16px; max-width: 76ch; line-height: 1.55; }
p.lead { font-size: 19px; color: var(--color-deep-ink); }
.dek { font-size: 18px; color: var(--color-deep-ink); max-width: 62ch; margin-bottom: 16px; line-height: 1.5; }

/* ─── Metadata strip (style guide §23) ─── */
.metadata {
  color: var(--color-slate-700);
  font-size: 13px;
  font-weight: 600;
  margin-top: 16px;
}
.metadata span { margin-right: 20px; display: inline-block; }
.metadata strong { color: var(--color-authority-navy); }

/* ─── Proof strip (style guide §10) ─── */
.proof-strip {
  background: var(--color-white);
  border-top: 1px solid var(--color-slate-300);
  border-bottom: 1px solid var(--color-slate-300);
  padding: 24px 0;
}
.proof-strip .container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  font-size: 14px;
  color: var(--color-deep-ink);
}
@media (min-width: 1024px) {
  .proof-strip .container { grid-template-columns: repeat(4, 1fr); gap: 24px; }
}
.proof-strip .item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 500;
}
.proof-strip .item::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--color-assurance-teal);
  border-radius: 1px;
  flex-shrink: 0;
}
.proof-strip strong { color: var(--color-authority-navy); }

/* ─── Layout grids ─── */
.layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}
@media (min-width: 1024px) {
  .layout { grid-template-columns: minmax(0, 1fr) 300px; gap: 48px; }
}
.aside {
  border-top: 1px solid var(--color-slate-300);
  padding-top: 24px;
}
@media (min-width: 1024px) {
  .aside {
    border-top: none;
    border-left: 1px solid var(--color-slate-300);
    padding-top: 0;
    padding-left: 32px;
  }
}
.aside h4 { margin-bottom: 12px; }
.aside ul { list-style: none; font-size: 15px; }
.aside li { margin-bottom: 8px; }
.aside dl dt {
  font-size: 12px;
  color: var(--color-slate-700);
  margin-top: 10px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 600;
}
.aside dl dd { font-size: 15px; color: var(--color-deep-ink); margin-bottom: 4px; }

/* ─── Audience pathways (style guide §10) ─── */
.pathways {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 24px;
}
@media (min-width: 768px) { .pathways { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .pathways { grid-template-columns: repeat(3, 1fr); } }
.pathway {
  border: 1px solid var(--color-slate-300);
  background: var(--color-white);
  padding: 24px;
  border-radius: 8px;
}
.pathway:hover { border-color: var(--color-regulatory-blue); }
.pathway h3 {
  font-size: 18px;
  margin: 0 0 8px;
  color: var(--color-authority-navy);
}
.pathway p {
  font-size: 15px;
  color: var(--color-deep-ink);
  margin-bottom: 12px;
}
.pathway a {
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
}
.pathway a:hover { text-decoration: underline; }

/* ─── Insight cards (style guide §12) ─── */
.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin: 24px 0;
}
@media (min-width: 768px) { .card-grid { grid-template-columns: repeat(2, 1fr); } }
.card {
  border: 1px solid var(--color-slate-300);
  border-radius: 8px;
  background: var(--color-white);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s ease;
}
.card:hover { border-color: var(--color-regulatory-blue); }
.card .content-type {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-assurance-teal);
  margin-bottom: 10px;
}
.card .meta {
  font-size: 13px;
  color: var(--color-slate-700);
  margin-bottom: 12px;
  font-weight: 500;
}
.card h3 {
  font-size: 20px;
  color: var(--color-authority-navy);
  margin: 0 0 10px;
}
.card p {
  flex: 1;
  font-size: 16px;
  color: var(--color-deep-ink);
  margin-bottom: 14px;
}
.card .card-foot {
  font-size: 14px;
  font-weight: 600;
}

/* ─── Status tags (style guide §12) ─── */
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
  background: var(--color-white);
}
.tag::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}
.tag.mapped { color: var(--color-assurance-teal); border-color: var(--color-assurance-teal); }
.tag.validated { color: var(--color-progress-green); border-color: var(--color-progress-green); }
.tag.needs-evidence { color: var(--color-amber-risk); border-color: var(--color-amber-risk); }
.tag.exception { color: var(--color-red-control); border-color: var(--color-red-control); }
.tag.draft { color: var(--color-slate-700); border-color: var(--color-slate-700); }
.tag.restricted { color: var(--color-authority-navy); border-color: var(--color-authority-navy); }

/* ─── Term Card / Finding view (Helm-specific) ─── */
.term-card {
  background: var(--color-white);
  border: 1px solid var(--color-slate-300);
  border-radius: 8px;
  padding: 32px;
  margin: 24px 0;
}
.provenance-ribbon {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  padding-bottom: 20px;
  border-bottom: 2px solid var(--color-authority-navy);
  margin-bottom: 24px;
}
@media (min-width: 768px) {
  .provenance-ribbon { display: flex; flex-wrap: wrap; gap: 32px; }
}
.provenance-ribbon .item { display: flex; flex-direction: column; }
.provenance-ribbon .label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-slate-700);
  margin-bottom: 4px;
  font-weight: 600;
}
.provenance-ribbon .value {
  font-size: 15px;
  color: var(--color-deep-ink);
  font-weight: 500;
}
.provenance-ribbon .value.navy { color: var(--color-authority-navy); font-weight: 600; }
.provenance-ribbon .value.teal { color: var(--color-assurance-teal); font-weight: 600; }
.provenance-ribbon .value.risk { color: var(--color-red-control); font-weight: 600; }

.term-title {
  font-family: var(--font-sans);
  font-size: 28px;
  font-weight: 600;
  color: var(--color-authority-navy);
  margin-bottom: 4px;
  line-height: 1.2;
}
.term-pronunciation {
  color: var(--color-slate-700);
  font-size: 14px;
  margin-bottom: 16px;
}

.definition-block {
  font-size: 17px;
  line-height: 1.55;
  color: var(--color-deep-ink);
  margin: 16px 0;
  padding: 20px 24px;
  background: var(--color-paper);
  border-left: 3px solid var(--color-assurance-teal);
  border-radius: 0 4px 4px 0;
}

.policy-quote {
  font-family: var(--font-serif);
  font-size: 17px;
  line-height: 1.6;
  color: var(--color-deep-ink);
  margin: 16px 0;
  padding: 20px 24px;
  background: var(--color-paper);
  border-left: 4px solid var(--color-authority-navy);
  border-radius: 0 4px 4px 0;
}
.policy-quote .src {
  display: block;
  margin-top: 12px;
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--color-slate-700);
  font-weight: 500;
}

/* ─── Tables (style guide §12: first-class UI) ─── */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  margin: 16px 0 24px;
}
table thead th {
  text-align: left;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-slate-700);
  padding: 12px 16px 12px 0;
  border-bottom: 2px solid var(--color-authority-navy);
}
table tbody td {
  padding: 14px 16px 14px 0;
  border-bottom: 1px solid var(--color-slate-300);
  color: var(--color-deep-ink);
  vertical-align: top;
}
table tbody tr:last-child td { border-bottom: 1px solid var(--color-slate-300); }
.cell-mono { font-family: var(--font-mono); font-size: 14px; color: var(--color-slate-700); }
.cell-num { text-align: right; font-family: var(--font-mono); }
.cell-decision-in { color: var(--color-progress-green); font-weight: 600; }
.cell-decision-out { color: var(--color-red-control); font-weight: 600; }
.cell-decision-cond { color: var(--color-amber-risk); font-weight: 600; }
table caption {
  text-align: left;
  font-size: 13px;
  color: var(--color-slate-700);
  margin-top: 8px;
  caption-side: bottom;
}

/* ─── Buttons (style guide §12) ─── */
.actions { margin: 24px 0; display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-block;
  padding: 12px 24px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid var(--color-regulatory-blue);
  background: var(--color-regulatory-blue);
  color: var(--color-white);
  cursor: pointer;
  text-decoration: none;
  border-radius: 4px;
  transition: background 0.15s ease;
}
.btn:hover {
  background: var(--color-authority-navy);
  border-color: var(--color-authority-navy);
  text-decoration: none;
  color: var(--color-white);
}
.btn.secondary {
  background: var(--color-white);
  color: var(--color-regulatory-blue);
}
.btn.secondary:hover {
  background: var(--color-regulatory-blue);
  color: var(--color-white);
}
.btn.large { padding: 14px 28px; font-size: 16px; }

/* ─── Audit trail (evidence-graph treatment per style guide §13) ─── */
.audit {
  font-size: 14px;
  margin: 16px 0;
  border: 1px solid var(--color-slate-300);
  border-radius: 8px;
  background: var(--color-white);
}
.audit-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--color-slate-100);
}
@media (min-width: 768px) {
  .audit-row { grid-template-columns: 180px 200px 1fr; gap: 16px; }
}
.audit-row:last-child { border-bottom: none; }
.audit-ts {
  font-family: var(--font-mono);
  color: var(--color-slate-700);
  font-size: 13px;
}
.audit-actor {
  font-family: var(--font-mono);
  color: var(--color-regulatory-blue);
  font-size: 13px;
  font-weight: 500;
}
.audit-event { color: var(--color-deep-ink); }

/* ─── Source / metadata footer (institutional trust per style guide §4.3) ─── */
.source-note {
  font-size: 13px;
  color: var(--color-slate-700);
  border-top: 1px solid var(--color-slate-300);
  padding-top: 20px;
  margin-top: 32px;
  line-height: 1.7;
  background: var(--color-paper);
  padding: 20px 24px;
  border-radius: 8px;
  border: 1px solid var(--color-slate-300);
}
.source-note strong { color: var(--color-authority-navy); }
.source-note p { margin-bottom: 6px; max-width: none; }

/* ─── ASCII / diagram block ─── */
.diagram {
  font-family: var(--font-mono);
  font-size: 13px;
  background: var(--color-paper);
  border: 1px solid var(--color-slate-300);
  border-left: 3px solid var(--color-assurance-teal);
  padding: 20px;
  white-space: pre;
  overflow-x: auto;
  line-height: 1.6;
  color: var(--color-deep-ink);
  margin: 20px 0;
  border-radius: 4px;
}

/* ─── Three-column generic grid ─── */
.three-col {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin: 24px 0;
}
@media (min-width: 768px) { .three-col { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .three-col { grid-template-columns: repeat(3, 1fr); } }
.three-col .col h3 {
  font-size: 18px;
  margin-top: 0;
  padding-top: 16px;
  border-top: 3px solid var(--color-authority-navy);
}

/* ─── Footer (style guide §10 institutional band) ─── */
footer {
  background: var(--color-authority-navy);
  color: var(--color-white);
  padding: 48px 0 24px;
  font-size: 14px;
  margin-top: 64px;
}
footer .container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}
@media (min-width: 768px) {
  footer .container { grid-template-columns: 2fr 1fr 1fr 1fr; }
}
footer h5 {
  font-family: var(--font-sans);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-slate-300);
  margin-bottom: 14px;
  font-weight: 600;
}
footer ul { list-style: none; }
footer li { margin-bottom: 6px; }
footer a { color: var(--color-white); text-decoration: none; }
footer a:hover { text-decoration: underline; color: var(--color-white); }
.footer-attr {
  font-family: var(--font-sans);
  color: var(--color-white);
  font-size: 18px;
  margin-bottom: 8px;
  font-weight: 700;
}
.footer-tag {
  color: var(--color-slate-300);
  font-size: 14px;
  margin-bottom: 10px;
}
.footer-updated {
  color: var(--color-slate-300);
  font-size: 12px;
  font-family: var(--font-mono);
  margin-top: 12px;
}
.footer-bottom {
  border-top: 1px solid var(--color-slate-700);
  margin-top: 32px;
  padding-top: 16px;
  font-size: 12px;
  color: var(--color-slate-300);
  text-align: center;
}
.footer-bottom .container { display: block; }

/* ─── Utility ─── */
.text-center { text-align: center; }
.mb-0 { margin-bottom: 0; }
.mt-4 { margin-top: 32px; }