:root {
  --polus-green: #99cc66;
  --polus-green-dark: #6f9f40;
  --polus-green-soft: #eaf4df;
  --polus-navy: #091b33;
  --polus-neutral: #c8c8c8;
  --polus-muted: #626b76;
  --polus-surface: #f4f5f3;
  --polus-white: #ffffff;
  --ink: var(--polus-navy);
  --muted: var(--polus-muted);
  --navy: var(--polus-navy);
  --teal: var(--polus-green-dark);
  --gold: var(--polus-green);
  --cream: var(--polus-surface);
  --paper: var(--polus-white);
  --line: var(--polus-neutral);
  --soft: var(--polus-green-soft);
  --focus: var(--polus-green);
  --shadow: 0 18px 48px rgba(9, 27, 51, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
}

body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: "Source Sans 3", Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body.nav-open {
  overflow: hidden;
}

a {
  color: inherit;
  text-underline-offset: 0.18em;
}

img,
svg {
  display: block;
  height: auto;
  max-width: 100%;
}

:focus-visible {
  outline: 3px solid #5d8f30;
  outline-offset: 3px;
}

.skip-link {
  left: 1rem;
  position: absolute;
  top: -5rem;
  z-index: 50;
  background: var(--ink);
  color: white;
  padding: 0.7rem 1rem;
  border-radius: 6px;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid rgba(200, 200, 200, 0.95);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.nav-wrap {
  width: min(1160px, calc(100% - 32px));
  margin: 0 auto;
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 800;
  text-decoration: none;
  color: var(--ink);
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background: var(--paper);
  color: var(--navy);
  border: 1px solid rgba(9, 27, 51, 0.12);
  overflow: hidden;
  display: grid;
  place-items: center;
  font-weight: 900;
  letter-spacing: 0;
}

.brand-mark img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.brand small {
  display: block;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 700;
}

.nav-toggle {
  display: none;
  min-height: 44px;
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: 8px;
  padding: 0.65rem 0.75rem;
  font: inherit;
  color: var(--ink);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.2rem;
}

.site-nav a {
  text-decoration: none;
  color: var(--muted);
  font-weight: 700;
  font-size: 0.92rem;
  padding: 0.7rem 0.65rem;
  border-radius: 6px;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--ink);
  background: rgba(153, 204, 102, 0.18);
}

.site-nav a[aria-current="page"] {
  color: var(--ink);
}

.button,
button.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 44px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: var(--polus-green);
  color: var(--polus-navy);
  padding: 0.78rem 1rem;
  text-decoration: none;
  cursor: pointer;
  font: inherit;
  font-weight: 800;
  font-size: 0.94rem;
  line-height: 1.15;
  text-align: center;
  transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease;
}

.button:hover {
  background: var(--polus-green-dark);
  color: white;
}

.site-nav a.button {
  color: var(--polus-navy);
  font-weight: 800;
}

.site-nav a.button:hover {
  color: white;
  background: var(--polus-green-dark);
}

.button.secondary {
  background: var(--paper);
  color: var(--navy);
  border-color: var(--line);
}

.button.secondary:hover {
  border-color: var(--polus-green);
  background: var(--polus-green-soft);
}

.button.gold {
  background: var(--polus-green);
  color: var(--polus-navy);
}

.button.gold:hover {
  background: var(--polus-green-dark);
  color: white;
}

main {
  overflow: hidden;
}

.section {
  padding: 80px 0;
}

.section.tint {
  background: var(--soft);
}

.section.dark {
  background:
    linear-gradient(120deg, rgba(9, 27, 51, 0.96), rgba(9, 27, 51, 1)),
    var(--navy);
  color: white;
}

.container {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.narrow {
  width: min(820px, calc(100% - 32px));
  margin: 0 auto;
}

.eyebrow {
  color: var(--teal);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 0.75rem;
}

.dark .eyebrow {
  color: #b8df91;
}

h1,
h2,
h3 {
  line-height: 1.12;
  margin: 0;
  letter-spacing: 0;
  text-wrap: balance;
}

h1 {
  max-width: 17ch;
  font-size: clamp(2.6rem, 5vw, 4.5rem);
}

h2 {
  max-width: 24ch;
  font-size: clamp(1.95rem, 3.4vw, 3.15rem);
}

h3 {
  font-size: 1.16rem;
}

p {
  margin: 0;
}

.lead {
  color: var(--muted);
  font-size: clamp(1.05rem, 1.6vw, 1.22rem);
  line-height: 1.58;
  max-width: 68ch;
}

.dark .lead,
.dark .muted {
  color: #d6e5ec;
}

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

.hero {
  padding: 76px 0 92px;
  background:
    linear-gradient(120deg, rgba(255, 255, 255, 0.98), rgba(244, 245, 243, 0.92)),
    linear-gradient(155deg, rgba(153, 204, 102, 0.2), rgba(9, 27, 51, 0.06));
  position: relative;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(90deg, rgba(9, 27, 51, 0.05) 1px, transparent 1px),
    linear-gradient(rgba(9, 27, 51, 0.045) 1px, transparent 1px);
  background-size: 54px 54px;
  -webkit-mask-image: linear-gradient(90deg, rgba(0, 0, 0, 0.28), transparent 64%);
  mask-image: linear-gradient(90deg, rgba(0, 0, 0, 0.28), transparent 64%);
  pointer-events: none;
}

.hero > * {
  position: relative;
}

.home .hero {
  padding: 40px 0 30px;
}

.home .hero h1 {
  max-width: 15ch;
  font-size: clamp(2.45rem, 5.2vw, 4.55rem);
}

.home .hero-copy {
  gap: 1.05rem;
}

.home .visual-panel {
  padding: 1rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(330px, 0.92fr);
  align-items: center;
  gap: clamp(2rem, 5vw, 4rem);
}

.hero-copy {
  display: grid;
  gap: 1.35rem;
}

.hero-actions,
.inline-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.status-line {
  display: inline-flex;
  width: fit-content;
  border: 1px solid rgba(153, 204, 102, 0.78);
  background: rgba(255, 255, 255, 0.84);
  color: var(--navy);
  border-radius: 999px;
  padding: 0.55rem 0.8rem;
  font-weight: 800;
  font-size: 0.88rem;
  line-height: 1.4;
}

.visual-panel {
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 1.25rem;
}

.visual-label {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  margin-bottom: 0.9rem;
  font-weight: 900;
}

.visual-caption {
  margin-top: 0.85rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.signal-band {
  background: var(--navy);
  color: white;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

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

.signal-grid > div {
  display: grid;
  gap: 0.15rem;
  padding: 1.25rem 1.5rem;
  border-right: 1px solid rgba(255, 255, 255, 0.14);
}

.signal-grid > div:first-child {
  padding-left: 0;
}

.signal-grid > div:last-child {
  border-right: 0;
}

.signal-grid strong {
  color: var(--polus-green);
}

.signal-grid span {
  color: #d6e5ec;
  font-size: 0.9rem;
}

.pill {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 0.32rem 0.58rem;
  background: var(--polus-green-soft);
  color: var(--polus-navy);
  border: 1px solid rgba(153, 204, 102, 0.7);
  font-size: 0.74rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.brand-quote {
  margin: 0;
  border-left: 5px solid var(--polus-green);
  background: var(--paper);
  color: var(--navy);
  padding: 1.2rem 1.35rem;
  font-size: 1.16rem;
  font-weight: 800;
  box-shadow: 0 10px 24px rgba(9, 27, 51, 0.06);
}

.evidence-item {
  display: grid;
  gap: 0.25rem;
  padding: 1rem 0;
  border-top: 1px solid var(--line);
}

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

.comparison-story {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border: 1px solid var(--line);
  background: var(--paper);
}

.comparison-column {
  padding: 2rem;
}

.comparison-column + .comparison-column {
  border-left: 1px solid var(--line);
}

.comparison-column.emphasized {
  background: var(--navy);
  color: white;
}

.comparison-column.emphasized .comparison-label {
  color: var(--polus-green);
}

.comparison-column.emphasized .check-list li {
  color: #e7edf2;
}

.comparison-label {
  margin-bottom: 1.1rem;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.plain-list {
  display: grid;
  gap: 0.7rem;
  margin: 0;
  padding-left: 1.15rem;
  color: var(--muted);
}

.workflow-comparison {
  max-width: 940px;
  margin-inline: auto;
}

.workflow-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: workflow;
}

.workflow-list li {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 0.75rem;
  align-items: center;
  min-height: 48px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  counter-increment: workflow;
}

.workflow-list li::before {
  content: counter(workflow, decimal-leading-zero);
  color: var(--polus-green);
  font-size: 0.72rem;
  font-weight: 900;
}

.workflow-list.muted li {
  border-top-color: var(--line);
  color: var(--muted);
}

.workflow-list.muted li::before {
  color: #7b8793;
}

.centered-quote {
  max-width: 760px;
  margin: 1.5rem auto 0;
  text-align: center;
}

.mastery-flow {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  border: 1px solid var(--line);
  background: var(--paper);
}

.mastery-flow article {
  min-width: 0;
  padding: 1.2rem;
  border-right: 1px solid var(--line);
}

.mastery-flow article:last-child {
  border-right: 0;
}

.mastery-flow span,
.domain-grid > article > span {
  display: block;
  margin-bottom: 0.65rem;
  color: #56733c;
  font-size: 0.74rem;
  font-weight: 900;
}

.mastery-flow h3 {
  margin-bottom: 0.45rem;
  font-size: 1.08rem;
}

.mastery-flow p {
  color: var(--muted);
  font-size: 0.93rem;
}

.differentiation-note {
  max-width: 76ch;
  margin: 1.4rem auto 0;
  padding: 1rem 1.15rem;
  border-left: 4px solid var(--polus-green);
  background: rgba(255, 255, 255, 0.72);
  color: var(--navy);
  font-weight: 750;
}

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

.audience-panel {
  padding: 1.7rem;
  border: 1px solid var(--line);
  border-top: 5px solid var(--polus-green);
  background: var(--paper);
}

.audience-panel h3 {
  max-width: 24ch;
  margin-bottom: 1rem;
  font-size: 1.45rem;
}

.audience-panel > a,
.architecture-grid a {
  display: inline-block;
  margin-top: 1rem;
  font-weight: 800;
}

.phase-list {
  display: grid;
  margin: 1.4rem 0 0;
  padding: 0;
  list-style: none;
}

.phase-list li {
  display: grid;
  grid-template-columns: 112px 1fr;
  gap: 1rem;
  padding: 0.85rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.phase-list strong {
  color: var(--polus-green);
}

.phase-list span {
  color: #dce4eb;
}

.architecture-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border: 1px solid var(--line);
  background: var(--paper);
}

.architecture-grid article {
  min-width: 0;
  padding: 1.6rem;
  border-right: 1px solid var(--line);
}

.architecture-grid article:last-child {
  border-right: 0;
}

.architecture-grid .featured-layer {
  border-top: 5px solid var(--polus-green);
  margin-top: -1px;
}

.architecture-grid h3 {
  margin: 1rem 0 0.7rem;
}

.architecture-grid p {
  color: var(--muted);
}

.product-kicker {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.55rem;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 800;
}

.status-tag {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 0.2rem 0.5rem;
  border: 1px solid #95b870;
  border-radius: 999px;
  color: #395620;
  background: #f2f8ec;
  white-space: nowrap;
}

.status-tag.future {
  border-color: var(--line);
  color: var(--muted);
  background: #f5f6f7;
}

.domain-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  background: var(--paper);
}

.domain-grid article {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 0.7rem;
  min-width: 0;
  padding: 1.15rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.domain-grid h3 {
  margin-bottom: 0.3rem;
  font-size: 1.03rem;
}

.domain-grid p {
  color: var(--muted);
}

.compact-principles {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 1.25rem 0;
}

.compact-principles article {
  min-height: 104px;
}

.philosophy-strip {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: #f7f9f5;
}

.process-card {
  border-top: 4px solid var(--polus-green);
}

.center-action {
  display: flex;
  justify-content: center;
  margin-top: 1.5rem;
  font-weight: 800;
}

.principle-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  background: var(--paper);
}

.principle-grid article {
  display: grid;
  gap: 0.35rem;
  min-height: 138px;
  padding: 1.2rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.parent-principles {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

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

.parent-benefits {
  align-items: center;
}

.benefit-list {
  display: grid;
}

.benefit-list article {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 1rem;
  padding: 1.2rem 0;
  border-top: 1px solid var(--line);
}

.benefit-list article:last-child {
  border-bottom: 1px solid var(--line);
}

.benefit-list h3 {
  margin-bottom: 0.3rem;
}

.benefit-list p {
  color: var(--muted);
}

.benefit-mark {
  color: var(--polus-green-dark);
  font-weight: 900;
}

.identity-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.identity-grid article {
  padding: 2rem;
}

.identity-grid article + article {
  border-left: 1px solid rgba(255, 255, 255, 0.2);
}

.identity-grid h3 {
  margin-bottom: 0.7rem;
  font-size: 1.65rem;
}

.identity-grid article > p:last-child {
  color: #d6e5ec;
}

.identity-symbol {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  margin-bottom: 1.2rem;
  border: 1px solid var(--polus-green);
  color: var(--polus-green);
  font-weight: 900;
}

.product-symbol {
  background: var(--polus-green);
  color: var(--navy);
}

.grid {
  display: grid;
  gap: 1rem;
  align-items: stretch;
}

.grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

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

.grid.four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.grid.five {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.section-head {
  display: grid;
  gap: 0.9rem;
  margin-bottom: 2.15rem;
}

.section-head .lead {
  max-width: 64ch;
}

.card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  height: 100%;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1.25rem;
  box-shadow: 0 10px 24px rgba(9, 27, 51, 0.06);
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.card h3 {
  margin-bottom: 0.55rem;
}

.card p,
.card li {
  color: var(--muted);
}

.card p + p {
  margin-top: 0.75rem;
}

.dimension-label {
  margin-top: auto;
  padding-top: 0.85rem;
  color: var(--polus-green-dark) !important;
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.myth-panel {
  border-left: 5px solid var(--polus-green);
  background: var(--paper);
  padding: 1.5rem;
  box-shadow: 0 10px 24px rgba(9, 27, 51, 0.06);
}

.myth-panel p + p {
  margin-top: 1rem;
}

.trust-card .pill {
  margin-bottom: 0.8rem;
}

.trust-card.future {
  border-left: 5px solid var(--polus-neutral);
}

.source-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.source-list article {
  padding: 1.25rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.source-list h3,
.source-list p {
  margin-bottom: 0.55rem;
}

.source-list p {
  color: var(--muted);
}

.source-list a {
  font-weight: 800;
}

.feature-card,
.philosophy-card,
.research-card,
.roadmap-card {
  min-height: 100%;
}

.number {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: var(--polus-green-soft);
  color: var(--polus-navy);
  font-weight: 900;
  margin-bottom: 1rem;
}

.list {
  margin: 0;
  padding-left: 1.1rem;
}

.list li + li {
  margin-top: 0.45rem;
}

.check-list {
  display: grid;
  gap: 0.65rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.check-list li {
  position: relative;
  padding-left: 1.55rem;
}

.check-list li::before {
  content: "";
  width: 0.58rem;
  height: 0.58rem;
  border-radius: 50%;
  background: var(--polus-green);
  position: absolute;
  left: 0;
  top: 0.55rem;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
  gap: clamp(2rem, 5vw, 4.25rem);
  align-items: start;
}

.band {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}

.roadmap-card {
  border-left: 5px solid var(--polus-green);
}

.roadmap-card.future {
  border-left-color: var(--polus-neutral);
}

.roadmap-card .pill {
  align-self: flex-start;
  margin-bottom: 0.8rem;
}

.research-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.research-tags span {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.45rem 0.7rem;
  font-weight: 800;
  color: var(--navy);
}

.section a:not(.button):not(.pill) {
  color: #426d1f;
  font-weight: 750;
}

.dark a:not(.button) {
  color: #c7e8a6;
}

.comparison {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 680px;
}

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

th {
  background: var(--soft);
  color: var(--navy);
  font-size: 0.9rem;
}

tr:last-child td {
  border-bottom: 0;
}

.loop {
  counter-reset: loop;
  display: grid;
  gap: 0.85rem;
}

.loop-item {
  counter-increment: loop;
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 0.9rem;
  align-items: start;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1rem;
}

.loop-item::before {
  content: counter(loop);
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--polus-green-soft);
  color: var(--polus-navy);
  display: grid;
  place-items: center;
  font-weight: 900;
  grid-row: 1 / span 2;
}

.loop-item p {
  grid-column: 2;
}

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

.faq-item {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  overflow: hidden;
}

.faq button {
  width: 100%;
  text-align: left;
  padding: 1rem 1.15rem;
  background: var(--paper);
  border: 0;
  color: var(--ink);
  font: inherit;
  font-weight: 850;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  cursor: pointer;
}

.faq button:hover {
  background: var(--polus-green-soft);
}

.faq button::after {
  content: "+";
  font-weight: 900;
}

.faq button[aria-expanded="true"]::after {
  content: "-";
}

.faq-panel {
  display: none;
  padding: 0 1.15rem 1rem;
  color: var(--muted);
  max-width: 72ch;
}

.faq-panel.open {
  display: block;
}

.form {
  display: grid;
  gap: 1rem;
}

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

.spam-trap {
  position: absolute;
  left: -10000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

label {
  display: grid;
  gap: 0.35rem;
  color: var(--ink);
  font-weight: 800;
}

input,
select,
textarea {
  width: 100%;
  min-height: 48px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  color: var(--ink);
  font: inherit;
  padding: 0.78rem 0.85rem;
}

textarea {
  min-height: 130px;
  resize: vertical;
}

.checkbox {
  grid-template-columns: 22px 1fr;
  align-items: start;
  font-weight: 700;
}

.checkbox input {
  width: 18px;
  height: 18px;
  margin-top: 0.25rem;
}

.form label:focus-within {
  color: #426d1f;
}

input[aria-invalid="true"],
select[aria-invalid="true"],
textarea[aria-invalid="true"] {
  border-color: #9b2f2f;
  box-shadow: 0 0 0 2px rgba(155, 47, 47, 0.12);
}

.form-note,
.error,
.success {
  font-size: 0.92rem;
}

.form-trust {
  border-left: 4px solid var(--polus-green);
  background: var(--polus-green-soft);
  padding: 1rem;
  font-size: 0.92rem;
}

.form-trust p + p {
  margin-top: 0.45rem;
}

.form-trust a {
  font-weight: 800;
}

.error {
  color: #9b2f2f;
  min-height: 1.35rem;
}

.success {
  display: none;
  border: 1px solid rgba(111, 159, 64, 0.45);
  background: rgba(153, 204, 102, 0.16);
  color: #416624;
  border-radius: 8px;
  padding: 1rem;
  font-weight: 800;
}

.success.show {
  display: block;
}

.site-footer {
  background: var(--polus-navy);
  color: white;
  padding: 48px 0;
}

.site-footer h2 {
  font-size: 1.55rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 0.8fr 0.8fr;
  gap: 2rem;
}

.footer-grid a {
  color: #d6e5ec;
  text-decoration: none;
}

.footer-grid a:hover {
  color: white;
}

.footer-links {
  display: grid;
  gap: 0.45rem;
  align-content: start;
}

.fine-print {
  color: #afbfca;
  font-size: 0.9rem;
}

@media (max-width: 920px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: fixed;
    inset: 76px 0 auto 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    max-height: calc(100dvh - 76px);
    overflow-y: auto;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    padding: 0.75rem 1rem 1rem;
    box-shadow: var(--shadow);
  }

  body.nav-open .site-nav {
    display: flex;
  }

  .site-nav a {
    min-height: 46px;
    display: flex;
    align-items: center;
    padding: 0.7rem 0.85rem;
  }

  .hero-grid,
  .split,
  .comparison-story,
  .identity-grid,
  .architecture-grid {
    grid-template-columns: 1fr;
  }

  .grid.three,
  .grid.four,
  .grid.five,
  .principle-grid,
  .mastery-flow,
  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-grid .visual-panel {
    width: min(100%, 620px);
    justify-self: center;
  }

  .comparison-column + .comparison-column,
  .identity-grid article + article {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .architecture-grid article {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .architecture-grid article:last-child {
    border-bottom: 0;
  }

  .mastery-flow article {
    border-bottom: 1px solid var(--line);
  }

  .mastery-flow article:nth-child(2n) {
    border-right: 0;
  }

  .mastery-flow article:nth-last-child(-n + 2) {
    border-bottom: 0;
  }

  .architecture-grid .featured-layer {
    margin-top: 0;
  }

  .identity-grid article + article {
    border-top-color: rgba(255, 255, 255, 0.2);
  }

  .hero {
    padding-top: 52px;
  }

  .section {
    padding: 64px 0;
  }
}

@media (max-width: 640px) {
  .section {
    padding: 44px 0;
  }

  .nav-wrap,
  .container,
  .narrow {
    width: min(100% - 24px, 1120px);
  }

  .brand small {
    display: none;
  }

  .hero .visual-panel {
    display: none;
  }

  .hero,
  .home .hero {
    padding: 36px 0 38px;
  }

  .hero-copy {
    gap: 0.95rem;
  }

  h1,
  .home .hero h1 {
    max-width: none;
    font-size: clamp(2.2rem, 11vw, 3.05rem);
    line-height: 1.08;
  }

  h2 {
    max-width: none;
    font-size: clamp(1.75rem, 8vw, 2.15rem);
  }

  .section-head {
    gap: 0.75rem;
    margin-bottom: 1.35rem;
  }

  .lead {
    font-size: 1.05rem;
    line-height: 1.55;
  }

  .signal-grid > div,
  .signal-grid > div:first-child {
    padding: 0.75rem 0;
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  }

  .signal-grid > div:last-child {
    border-bottom: 0;
  }

  .grid.two,
  .grid.three,
  .grid.four,
  .grid.five,
  .signal-grid,
  .principle-grid,
  .mastery-flow,
  .audience-grid,
  .domain-grid,
  .source-list {
    grid-template-columns: 1fr;
  }

  .card {
    padding: 1rem;
    box-shadow: none;
  }

  .grid {
    gap: 0.75rem;
  }

  .process-card {
    display: grid;
    grid-template-columns: 36px 1fr;
    column-gap: 0.8rem;
    align-items: start;
    border-top: 1px solid var(--line);
    border-left: 4px solid var(--polus-green);
  }

  .process-card .number {
    grid-row: 1 / span 2;
    margin-bottom: 0;
  }

  .process-card h3 {
    margin-bottom: 0.25rem;
  }

  .comparison-column {
    padding: 1.25rem;
  }

  .mastery-flow article,
  .audience-panel,
  .architecture-grid article {
    padding: 1rem;
  }

  .mastery-flow article,
  .mastery-flow article:nth-child(2n),
  .mastery-flow article:nth-last-child(-n + 2) {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .mastery-flow article:last-child {
    border-bottom: 0;
  }

  .domain-grid article {
    grid-template-columns: 34px 1fr;
    padding: 1rem;
  }

  .phase-list li {
    grid-template-columns: 1fr;
    gap: 0.2rem;
  }

  .centered-quote {
    text-align: left;
  }

  .brand-quote {
    padding: 1rem;
    font-size: 1.05rem;
  }

  .benefit-list article {
    grid-template-columns: 38px 1fr;
    gap: 0.7rem;
    padding: 0.9rem 0;
  }

  .principle-grid article {
    min-height: 0;
    padding: 1rem;
  }

  .source-list article {
    padding: 1rem;
  }

  .center-action {
    margin-top: 1rem;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .form {
    gap: 0.85rem;
  }

  textarea {
    min-height: 100px;
  }

  .button {
    width: 100%;
  }

  .status-line {
    border-radius: 8px;
    padding: 0.7rem 0.8rem;
  }

  .site-footer {
    padding: 36px 0;
  }

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

  .footer-grid > div:first-child {
    grid-column: 1 / -1;
  }

  .footer-grid h2 {
    font-size: 1.55rem;
  }

  .footer-links {
    align-content: start;
    gap: 0.6rem;
  }

  .footer-links a {
    min-height: 36px;
    display: flex;
    align-items: center;
  }
}

@media (max-width: 440px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.35rem;
  }

  .footer-grid > div:first-child {
    grid-column: auto;
  }

  .visual-label {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.5rem;
  }
}

@media (max-width: 360px) {
  .nav-wrap,
  .container,
  .narrow {
    width: min(100% - 20px, 1120px);
  }

  .brand {
    gap: 0.55rem;
    font-size: 0.96rem;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
  }

  .nav-toggle {
    padding: 0.55rem 0.65rem;
  }

}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}