:root {
  --bg: #f6f7f4;
  --surface: #ffffff;
  --surface-alt: #eef4f1;
  --text: #17211d;
  --muted: #5d6963;
  --line: #d4ded8;
  --teal: #0d766e;
  --green: #3e7a3e;
  --rust: #a34f2c;
  --amber: #b87914;
  --charcoal: #22312b;
  --shadow: 0 16px 42px rgba(23, 33, 29, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a {
  color: var(--teal);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

code {
  background: #edf3ef;
  border: 1px solid var(--line);
  border-radius: 5px;
  color: #163f3b;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.92em;
  padding: 0.08rem 0.28rem;
}

.site-header {
  align-items: center;
  background: rgba(246, 247, 244, 0.94);
  border-bottom: 1px solid var(--line);
  display: flex;
  gap: 1.5rem;
  justify-content: space-between;
  min-height: 4.25rem;
  padding: 0.75rem max(1.25rem, calc((100vw - 1180px) / 2));
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  align-items: center;
  color: var(--charcoal);
  display: inline-flex;
  font-weight: 800;
  gap: 0.65rem;
  text-decoration: none;
  white-space: nowrap;
}

.brand-mark {
  align-items: center;
  background: var(--teal);
  border-radius: 6px;
  color: white;
  display: inline-flex;
  font-size: 1rem;
  height: 2rem;
  justify-content: center;
  width: 2rem;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.85rem;
  justify-content: flex-end;
}

.nav a {
  border-radius: 6px;
  color: var(--charcoal);
  font-size: 0.94rem;
  font-weight: 700;
  padding: 0.35rem 0.45rem;
  text-decoration: none;
}

.nav a:hover,
.nav a:focus {
  background: var(--surface-alt);
  color: var(--teal);
}

.band {
  padding: 4.5rem max(1.25rem, calc((100vw - 1180px) / 2));
}

.band.alt {
  background: var(--surface-alt);
}

.hero {
  align-items: center;
  display: grid;
  gap: 3rem;
  grid-template-columns: minmax(0, 1.07fr) minmax(320px, 0.93fr);
  min-height: calc(100vh - 4.25rem);
  padding-bottom: 4rem;
  padding-top: 4rem;
}

.hero h1 {
  color: var(--charcoal);
  font-size: clamp(2.15rem, 5.5vw, 4.8rem);
  letter-spacing: 0;
  line-height: 1.02;
  margin: 0;
  max-width: 12ch;
}

.lede {
  color: #37463f;
  font-size: 1.17rem;
  margin: 1.35rem 0 0;
  max-width: 66ch;
}

.eyebrow {
  color: var(--rust);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0;
  margin: 0 0 0.75rem;
  text-transform: uppercase;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.8rem;
}

.button {
  border: 1px solid var(--teal);
  border-radius: 6px;
  display: inline-flex;
  font-weight: 800;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.65rem 1rem;
  text-decoration: none;
}

.button.primary {
  background: var(--teal);
  color: white;
}

.button.secondary {
  background: white;
  color: var(--teal);
}

.kg-visual {
  aspect-ratio: 1;
  background:
    linear-gradient(90deg, rgba(13, 118, 110, 0.08) 1px, transparent 1px),
    linear-gradient(rgba(13, 118, 110, 0.08) 1px, transparent 1px),
    var(--surface);
  background-size: 34px 34px;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  min-height: 320px;
  overflow: hidden;
  position: relative;
}

.node,
.motif-center {
  align-items: center;
  border: 1px solid rgba(23, 33, 29, 0.16);
  border-radius: 8px;
  box-shadow: 0 8px 22px rgba(23, 33, 29, 0.12);
  display: flex;
  justify-content: center;
  position: absolute;
  text-align: center;
}

.node {
  color: white;
  font-size: 0.78rem;
  font-weight: 900;
  height: 3.35rem;
  width: 5.2rem;
  z-index: 2;
}

.node-a,
.node-e {
  background: var(--teal);
}

.node-b,
.node-d {
  background: var(--green);
}

.node-c,
.node-f {
  background: var(--rust);
}

.node-a {
  left: 9%;
  top: 14%;
}

.node-b {
  right: 10%;
  top: 20%;
}

.node-c {
  left: 13%;
  bottom: 24%;
}

.node-d {
  right: 9%;
  bottom: 19%;
}

.node-e {
  left: 35%;
  top: 5%;
}

.node-f {
  right: 32%;
  bottom: 6%;
}

.edge {
  background: rgba(34, 49, 43, 0.38);
  display: block;
  height: 2px;
  position: absolute;
  transform-origin: left center;
  z-index: 1;
}

.edge-ab {
  left: 26%;
  top: 25%;
  transform: rotate(7deg);
  width: 47%;
}

.edge-cd {
  left: 28%;
  bottom: 28%;
  transform: rotate(5deg);
  width: 45%;
}

.edge-ef {
  left: 47%;
  top: 25%;
  transform: rotate(86deg);
  width: 47%;
}

.edge-center-1 {
  left: 26%;
  top: 48%;
  transform: rotate(-24deg);
  width: 27%;
}

.edge-center-2 {
  right: 25%;
  top: 50%;
  transform: rotate(25deg);
  width: 28%;
}

.motif-center {
  background: #fff8ec;
  color: var(--charcoal);
  flex-direction: column;
  height: 6.7rem;
  left: 50%;
  line-height: 1.25;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 8.5rem;
  z-index: 3;
}

.motif-center span {
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 700;
}

.motif-center strong {
  color: var(--amber);
  font-size: 1.05rem;
}

.status-strip {
  background: var(--charcoal);
  color: white;
  display: grid;
  gap: 1px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  padding: 0 max(1.25rem, calc((100vw - 1180px) / 2));
}

.status-strip div {
  background: rgba(255, 255, 255, 0.04);
  padding: 1.1rem;
}

.status-strip strong,
.status-strip span {
  display: block;
}

.status-strip strong {
  font-size: 0.82rem;
  margin-bottom: 0.25rem;
  text-transform: uppercase;
}

.status-strip span {
  color: #dce7e2;
}

.section-heading {
  margin-bottom: 1.7rem;
  max-width: 760px;
}

.section-heading h2 {
  color: var(--charcoal);
  font-size: clamp(1.75rem, 3vw, 3rem);
  letter-spacing: 0;
  line-height: 1.12;
  margin: 0;
}

.two-col {
  display: grid;
  gap: 1.3rem 2rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.two-col p,
.card p,
.notice,
.split-callout p,
.rule-list,
.small-note,
.faq-list p,
.site-footer p {
  color: var(--muted);
}

.grid.cards {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 1.5rem 0 2rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1.2rem;
}

.card h3,
.split-callout h3 {
  color: var(--charcoal);
  margin: 0 0 0.45rem;
}

.card p,
.split-callout p {
  margin: 0;
}

.table-wrap {
  margin-top: 1.5rem;
  overflow-x: auto;
}

table {
  background: var(--surface);
  border: 1px solid var(--line);
  border-collapse: collapse;
  min-width: 760px;
  width: 100%;
}

caption {
  color: var(--muted);
  font-weight: 800;
  padding: 0 0 0.6rem;
  text-align: left;
}

th,
td {
  border-bottom: 1px solid var(--line);
  padding: 0.85rem;
  text-align: left;
  vertical-align: top;
}

th {
  background: #edf3ef;
  color: var(--charcoal);
  font-size: 0.86rem;
  text-transform: uppercase;
}

td {
  color: var(--muted);
}

.notice {
  background: #fff8ec;
  border: 1px solid #ead4a8;
  border-radius: 8px;
  padding: 1rem 1.1rem;
}

.tag {
  border-radius: 5px;
  display: inline-flex;
  font-size: 0.72rem;
  font-weight: 900;
  line-height: 1;
  padding: 0.22rem 0.36rem;
  text-transform: uppercase;
  vertical-align: 0.08rem;
  white-space: nowrap;
}

.tag.warning {
  background: #f8dfae;
  color: #6b3f00;
}

.split-callout,
.contact-panel {
  display: grid;
  gap: 1px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 1.6rem;
}

.split-callout div,
.contact-panel div {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 1.1rem;
}

.split-callout div:first-child,
.contact-panel div:first-child {
  border-radius: 8px 0 0 8px;
}

.split-callout div:last-child,
.contact-panel div:last-child {
  border-radius: 0 8px 8px 0;
}

.metric-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 1.7rem;
}

.metric {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1rem;
}

.metric strong,
.metric span,
.contact-panel strong,
.contact-panel span {
  display: block;
}

.metric strong {
  color: var(--rust);
  margin-bottom: 0.3rem;
}

.metric span,
.contact-panel span {
  color: var(--muted);
}

.steps {
  counter-reset: steps;
  display: grid;
  gap: 0.85rem;
  list-style: none;
  margin: 1.5rem 0;
  padding: 0;
}

.steps li {
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  gap: 0.25rem 1rem;
  grid-template-columns: 9rem minmax(0, 1fr);
  padding: 1rem 1rem 1rem 3.5rem;
  position: relative;
}

.steps li::before {
  align-items: center;
  background: var(--teal);
  border-radius: 6px;
  color: white;
  content: counter(steps);
  counter-increment: steps;
  display: inline-flex;
  font-weight: 900;
  height: 1.9rem;
  justify-content: center;
  left: 1rem;
  position: absolute;
  width: 1.9rem;
}

.steps strong {
  color: var(--charcoal);
}

.steps span {
  color: var(--muted);
}

.rule-list {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  margin: 1.5rem 0 0;
  padding: 1.2rem 1.2rem 1.2rem 2.5rem;
}

.rule-list li + li {
  margin-top: 0.6rem;
}

.small-note {
  margin-bottom: 0;
}

.faq-list {
  display: grid;
  gap: 0.8rem;
}

details {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.95rem 1rem;
}

summary {
  color: var(--charcoal);
  cursor: pointer;
  font-weight: 800;
}

details p {
  margin-bottom: 0;
}

.contact-panel {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.site-footer {
  background: var(--charcoal);
  padding: 2rem max(1.25rem, calc((100vw - 1180px) / 2));
}

.site-footer p {
  color: #dce7e2;
  margin: 0;
  max-width: 900px;
}

@media (max-width: 920px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.65rem;
  }

  .nav {
    justify-content: flex-start;
  }

  .hero,
  .two-col,
  .grid.cards,
  .metric-grid,
  .split-callout,
  .contact-panel,
  .status-strip {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero h1 {
    max-width: 13ch;
  }

  .kg-visual {
    justify-self: center;
    max-width: 520px;
    width: 100%;
  }

  .split-callout div:first-child,
  .split-callout div:last-child,
  .contact-panel div:first-child,
  .contact-panel div:last-child {
    border-radius: 8px;
  }
}

@media (max-width: 560px) {
  .band {
    padding-bottom: 3.25rem;
    padding-top: 3.25rem;
  }

  .hero h1 {
    font-size: 2.45rem;
    max-width: none;
  }

  .lede {
    font-size: 1.04rem;
  }

  .button {
    width: 100%;
  }

  .kg-visual {
    min-height: 300px;
  }

  .node {
    font-size: 0.68rem;
    height: 2.75rem;
    width: 4.35rem;
  }

  .motif-center {
    height: 5.7rem;
    width: 7.3rem;
  }

  .steps li {
    grid-template-columns: 1fr;
    padding-left: 3.4rem;
  }
}