:root {
  --ink: #0F0D0A;
  --black: #0B0A08;
  --paper: #F5F2EE;
  --green: #245C46;
  --accent: #74C69D;
  --accent-strong: #86D9AD;
  --muted: #8A8278;
  --rule: #2A2420;
  --rule-l: #DDD8D0;
  --font-display: 'DM Serif Display', Georgia, serif;
  --font-body: 'Jost', 'Helvetica Neue', Helvetica, sans-serif;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  background: var(--paper);
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.65;
}

body.nav-open { overflow: hidden; }

a { color: inherit; text-decoration: none; }

img { max-width: 100%; display: block; }

.site-shell {
  min-height: 100vh;
  overflow-x: hidden;
}

.container {
  width: min(1160px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--paper);
  border-bottom: 1px solid var(--rule-l);
}

.nav {
  height: 84px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  width: auto;
  flex: 0 0 auto;
}

.brand img {
  width: auto;
  height: 52px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-left: auto;
}

.nav-menu a,
.footer-links a {
  font-size: 12px;
  line-height: 1;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.nav-menu a:hover,
.footer-links a:hover { color: var(--green); }

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--rule);
  background: transparent;
  color: var(--ink);
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 1px;
  margin: 5px auto;
  background: currentColor;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 12px 18px;
  border: 1px solid var(--rule);
  border-radius: 3px;
  background: transparent;
  color: var(--ink);
  font-size: 12px;
  font-weight: 500;
  line-height: 1;
  text-transform: uppercase;
  letter-spacing: 0.13em;
  cursor: pointer;
  transition: background .2s ease, color .2s ease, border-color .2s ease, transform .2s ease;
}

.btn:hover {
  background: var(--ink);
  color: var(--paper);
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--ink);
  color: var(--paper);
}

.btn-primary:hover {
  background: var(--green);
  border-color: var(--green);
}

.btn-light {
  color: var(--paper);
  border-color: var(--paper);
}

.btn-light:hover {
  color: var(--ink);
  background: var(--paper);
}

.btn-accent {
  color: var(--black);
  background: var(--accent);
  border-color: var(--accent);
  font-weight: 600;
}

.btn-accent:hover {
  color: var(--black);
  background: var(--accent-strong);
  border-color: var(--accent-strong);
}

.section {
  padding: 96px 0;
  border-bottom: 1px solid var(--rule-l);
}

.section-tight { padding: 68px 0; }
.section-compact { padding: 76px 0; }

.hero {
  min-height: calc(100vh - 76px);
  display: grid;
  align-items: center;
  padding: 80px 0 56px;
  border-bottom: 1px solid var(--rule);
}

.hero-grid,
.split-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
  gap: 72px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--green);
  font-size: 11px;
  font-weight: 500;
  line-height: 1;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.section-number {
  display: inline-block;
  margin-right: 12px;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: 0;
  line-height: 0.98;
}

h1 {
  max-width: 900px;
  font-size: clamp(52px, 6vw, 72px);
}

h2 {
  max-width: 830px;
  font-size: clamp(38px, 4vw, 56px);
}

h3 {
  font-size: 28px;
  line-height: 1.08;
}

.lead {
  max-width: 720px;
  margin: 28px 0 0;
  color: var(--rule);
  font-size: 17px;
  line-height: 1.7;
}

.copy {
  max-width: 760px;
  margin: 26px 0 0;
  color: var(--rule);
}

.copy p { margin: 0 0 18px; }
.copy p:last-child { margin-bottom: 0; }

.statement {
  margin: 34px 0 0;
  padding: 24px 0 0;
  border-top: 1px solid var(--rule);
  color: var(--green);
  font-family: var(--font-display);
  font-size: clamp(25px, 2.5vw, 36px);
  line-height: 1.12;
}

.hero-actions,
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.microcopy {
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.editorial-panel {
  border: 1px solid var(--rule);
  padding: 34px;
  min-height: 420px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: var(--paper);
}

.panel-kicker {
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.panel-title {
  max-width: 340px;
  font-family: var(--font-display);
  font-size: 44px;
  line-height: 0.96;
}

.panel-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.panel-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding-top: 12px;
  border-top: 1px solid var(--rule);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.panel-list span {
  color: var(--green);
  font-family: var(--font-display);
  font-size: 26px;
  letter-spacing: 0;
  white-space: nowrap;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border-top: 1px solid var(--rule);
  border-left: 1px solid var(--rule);
}

.metric {
  min-height: 132px;
  padding: 24px 20px;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  display: flex;
  align-items: flex-end;
  font-family: var(--font-display);
  font-size: 24px;
  line-height: 1.08;
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(280px, 0.54fr);
  gap: 64px;
  align-items: end;
  margin-bottom: 52px;
}

.section-head .copy,
.section-head .lead { margin: 0; }

.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--rule);
  border-left: 1px solid var(--rule);
}

.card {
  min-height: 260px;
  padding: 28px;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
}

.card .num {
  display: block;
  margin-bottom: 38px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.14em;
}

.card h3 {
  margin-bottom: 18px;
  font-size: 30px;
}

.card p {
  margin: 0;
  color: var(--rule);
}

.feature-card {
  position: relative;
  background: var(--black);
  color: var(--paper);
  transform: scale(1.015);
  z-index: 1;
}

.feature-card::before {
  content: "";
  position: absolute;
  inset: 12px;
  border: 1px solid var(--accent);
  pointer-events: none;
}

.feature-card p,
.feature-card .num { color: var(--rule-l); }

.feature-card p + p { margin-top: 12px; }

.feature-card .btn {
  margin-top: 26px;
  color: var(--paper);
  border-color: var(--paper);
}

.feature-card .btn:hover {
  color: var(--ink);
  background: var(--paper);
}

.dark-band {
  background: var(--black);
  color: var(--paper);
  border-bottom-color: rgba(245, 242, 238, .22);
}

.dark-band .eyebrow,
.dark-band .statement { color: var(--accent); }
.dark-band .copy,
.dark-band .lead,
.dark-band p,
.dark-band li,
.dark-band .step p,
.dark-band .body-copy,
.dark-band .step-copy { color: rgba(245, 242, 238, .82); }
.dark-band .muted,
.dark-band small { color: rgba(245, 242, 238, .66); }
.dark-band h1,
.dark-band h2,
.dark-band h3 { color: var(--paper); }
.dark-band .step,
.dark-band .steps,
.dark-band .statement { border-color: rgba(245, 242, 238, .22); }
.dark-band .step-num { color: var(--accent); }

.system-architecture {
  padding: 88px 0;
}

.system-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, .72fr);
  gap: 72px;
  align-items: end;
  margin-bottom: 56px;
}

.system-intro .lead,
.system-intro .copy { margin-top: 0; }

.system-intro .copy { margin-top: 18px; }

.system-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid rgba(245, 242, 238, .24);
  border-left: 1px solid rgba(245, 242, 238, .24);
}

.system-stage {
  position: relative;
  min-height: 380px;
  padding: 28px;
  border-right: 1px solid rgba(245, 242, 238, .24);
  border-bottom: 1px solid rgba(245, 242, 238, .24);
}

.system-stage::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 28px;
  width: 34px;
  height: 2px;
  background: var(--accent);
}

.system-label {
  display: block;
  margin-bottom: 54px;
  color: var(--accent);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.system-stage h3 {
  margin-bottom: 22px;
  font-size: 29px;
}

.system-stage p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
}

.system-stage strong {
  display: block;
  margin-top: 30px;
  padding-top: 18px;
  border-top: 1px solid rgba(245, 242, 238, .18);
  color: var(--paper);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .1em;
  line-height: 1.55;
  text-transform: uppercase;
}

.system-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding-top: 34px;
}

.system-cta p {
  max-width: 620px;
  margin: 0;
  color: rgba(245, 242, 238, .78);
  font-family: var(--font-display);
  font-size: 24px;
  line-height: 1.18;
}

.system-cta .btn { flex: 0 0 auto; }

.bullet-list {
  display: grid;
  gap: 12px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.bullet-list li {
  position: relative;
  padding-left: 22px;
}

.bullet-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 7px;
  height: 7px;
  border: 1px solid var(--accent);
}

.steps {
  display: grid;
  border-top: 1px solid var(--rule);
}

.step {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 30px;
  padding: 28px 0;
  border-bottom: 1px solid var(--rule-l);
}

.step-num {
  color: var(--green);
  font-family: var(--font-display);
  font-size: 34px;
  line-height: 1;
}

.step h3 {
  margin-bottom: 10px;
  font-size: 30px;
}

.step p { margin: 0; color: var(--rule); }

.industry-grid,
.principles-grid,
.validation-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--rule);
  border-left: 1px solid var(--rule);
}

.mini-card {
  min-height: 190px;
  padding: 24px;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.mini-card h3 {
  margin-bottom: 14px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  line-height: 1.35;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.mini-card p { margin: 0; color: var(--rule); }

.team-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
}

.person-card {
  border: 1px solid rgba(245, 242, 238, .22);
  background: #000;
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding-top: 16px;
}

.portrait {
  aspect-ratio: 4 / 5;
  background: #090909;
  overflow: hidden;
  width: 42%;
  max-width: 230px;
  margin: 0 auto;
  border: 1px solid rgba(245, 242, 238, .22);
  border-radius: 2px;
}

.portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: grayscale(1) contrast(1.04);
}

.team-section {
  background: #000;
  color: var(--paper);
  border-bottom-color: rgba(245, 242, 238, .22);
  padding: 50px 0;
}

.team-intro {
  max-width: 820px;
  margin-bottom: 28px;
}

.team-intro h2 {
  color: var(--paper);
}

.team-intro > p:last-child {
  max-width: 690px;
  margin: 12px 0 0;
  color: rgba(245, 242, 238, .78);
  font-size: 15px;
}

.person-body {
  position: relative;
  padding: 18px 22px 20px;
}

.person-body h3 {
  color: var(--paper);
  font-size: 25px;
  margin-bottom: 12px;
}

.person-body > p {
  margin: 0;
  color: rgba(245, 242, 238, .76);
  font-size: 14px;
  line-height: 1.55;
}

.person-quote {
  margin: 14px 0 0;
  padding: 0;
  border: 0;
  color: rgba(245, 242, 238, .66) !important;
  font-family: var(--font-display);
  font-size: 13px;
  font-style: italic;
  line-height: 1.45;
}

.person-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.person-indicator {
  display: inline-block;
  margin: 0;
  color: var(--accent);
  font-size: 11px;
  letter-spacing: .18em;
}

.person-role {
  margin: 0;
  color: var(--accent);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.quote {
  margin-top: 26px;
  padding-top: 22px;
  border-top: 1px solid var(--rule-l);
  color: var(--green);
  font-family: var(--font-display);
  font-size: 25px;
  line-height: 1.14;
}

.comparison {
  width: 100%;
  border-collapse: collapse;
  border-top: 1px solid var(--rule);
  border-left: 1px solid var(--rule);
}

.comparison th,
.comparison td {
  padding: 18px;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  text-align: left;
  vertical-align: top;
}

.comparison th {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.sales-comparison td:first-child {
  width: 20%;
  font-weight: 500;
}

.sales-comparison .without,
.sales-comparison .with {
  width: 40%;
}

.status-x,
.status-check {
  display: inline-grid;
  place-items: center;
  width: 20px;
  height: 20px;
  margin-right: 10px;
  border: 1px solid currentColor;
  font-weight: 600;
  line-height: 1;
}

.status-x { color: #A24B47; }
.status-check { color: var(--green); }

.audience-section {
  background: var(--black);
  color: var(--paper);
}

.audience-section h2 { color: var(--paper); }
.audience-section .copy { color: rgba(245, 242, 238, .78); }

.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid rgba(245, 242, 238, .22);
  border-left: 1px solid rgba(245, 242, 238, .22);
}

.audience-card {
  min-height: 235px;
  padding: 26px;
  border-right: 1px solid rgba(245, 242, 238, .22);
  border-bottom: 1px solid rgba(245, 242, 238, .22);
}

.audience-card h3 {
  color: var(--paper);
  font-size: 27px;
  margin: 24px 0 16px;
}

.audience-card p {
  margin: 0;
  color: rgba(245, 242, 238, .76);
}

.card-marker {
  display: block;
  width: 24px;
  height: 3px;
  background: var(--accent);
}

.plans-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  align-items: stretch;
}

.plan {
  position: relative;
  border: 1px solid var(--rule);
  padding: 26px;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.plan.recommended {
  background: var(--black);
  color: var(--paper);
  border-color: var(--accent);
  transform: translateY(-10px);
}

.plan.recommended p,
.plan.recommended li { color: var(--rule-l); }

.plan-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 7px 10px;
  color: var(--black);
  background: var(--accent);
  font-size: 10px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.price {
  margin: 26px 0;
  padding: 20px 0;
  border-top: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  font-family: var(--font-display);
  font-size: 34px;
  line-height: 1.1;
}

.price span {
  display: block;
  margin-top: 8px;
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.plan.recommended .price {
  color: var(--accent-strong);
  border-color: rgba(134, 217, 173, .48);
}

.plan.recommended .price span { color: var(--paper); }

.plan .bullet-list {
  margin-bottom: 28px;
}

.plan .btn { margin-top: auto; }

.plan-ideal {
  min-height: 112px;
  margin: 0 0 18px;
  color: var(--rule);
}

.plan-ideal strong {
  display: block;
  margin-bottom: 5px;
  color: var(--ink);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.plan-group {
  margin-bottom: 18px;
  padding-top: 15px;
  border-top: 1px solid var(--rule-l);
}

.plan-group h4 {
  margin: 0 0 12px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.plan-group ul {
  display: grid;
  gap: 5px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.plan-group li {
  position: relative;
  padding-left: 16px;
  color: var(--rule);
  font-size: 13px;
}

.plan-group li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 5px;
  height: 5px;
  background: var(--accent);
}

.recommended .plan-ideal,
.recommended .plan-group li { color: rgba(245, 242, 238, .76); }
.recommended .plan-ideal strong,
.recommended .plan-group h4 { color: var(--paper); }
.recommended .plan-group { border-color: rgba(245, 242, 238, .22); }

.compact-plan {
  min-height: 330px;
}

.compact-plan .price {
  margin-bottom: 16px;
}

.compact-plan p:not(.eyebrow):not(.price) {
  color: var(--rule);
}

.evidence-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--rule);
  border-left: 1px solid var(--rule);
}

.evidence-card {
  min-height: 240px;
  padding: 28px;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.evidence-card h3 { margin: 34px 0 16px; }
.evidence-card p { margin: 0; color: var(--rule); }

.evidence-grid-single {
  grid-template-columns: minmax(0, 1fr);
  max-width: 760px;
}

.roi-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border-top: 1px solid var(--rule);
  border-left: 1px solid var(--rule);
}

.roi-grid article {
  min-height: 150px;
  padding: 24px;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.roi-grid strong,
.roi-grid span {
  display: block;
}

.roi-grid strong {
  margin-bottom: 22px;
  color: var(--green);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.roi-grid span {
  font-family: var(--font-display);
  font-size: 24px;
  line-height: 1.08;
}

.note-box {
  border: 1px solid var(--rule);
  padding: 34px;
  max-width: 840px;
}

.faq {
  border-top: 1px solid var(--rule);
}

.faq-item {
  border-bottom: 1px solid var(--rule-l);
}

.faq-question {
  width: 100%;
  padding: 24px 0;
  border: 0;
  background: transparent;
  color: var(--ink);
  display: flex;
  justify-content: space-between;
  gap: 20px;
  text-align: left;
  font: inherit;
  font-weight: 500;
  cursor: pointer;
}

.faq-question span {
  flex: 0 0 auto;
  color: var(--green);
  font-family: var(--font-display);
  font-size: 24px;
  line-height: 1;
}

.faq-answer {
  display: none;
  max-width: 760px;
  padding: 0 0 24px;
  color: var(--rule);
}

.faq-item.is-open .faq-answer { display: block; }

.legal-layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 72px;
}

.legal-nav {
  position: sticky;
  top: 104px;
  align-self: start;
  display: grid;
  gap: 12px;
}

.legal-nav a {
  padding-bottom: 12px;
  border-bottom: 1px solid var(--rule-l);
  color: var(--rule);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.legal-block {
  padding: 44px 0;
  border-bottom: 1px solid var(--rule-l);
}

.legal-block:first-child { padding-top: 0; }
.legal-block h2 { font-size: 38px; }

.site-footer {
  padding: 66px 0 40px;
  background: #18140F;
  color: var(--paper);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 56px;
}

.footer-brand img {
  width: auto;
  height: 52px;
}

.footer-brand p,
.footer-contact p {
  color: var(--rule-l);
  margin: 18px 0 0;
}

.footer-brand p {
  max-width: 430px;
  font-size: 15px;
  line-height: 1.7;
}

.footer-brand .footer-offer {
  margin-top: 12px;
  color: var(--accent);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.footer-contact a {
  color: var(--paper);
  text-decoration: underline;
  text-decoration-color: rgba(116, 198, 157, .45);
  text-underline-offset: 3px;
}

.footer-contact a:hover { color: var(--accent-strong); }

.sites-page .section { padding: 80px 0; }
.sites-page .section-compact { padding: 64px 0; }
.sites-page .section-tight { padding: 54px 0; }
.sites-page .section-head { margin-bottom: 42px; }

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 24px;
  align-content: start;
}

.footer-bottom {
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid rgba(245, 242, 238, .28);
  color: var(--rule-l);
  font-size: 12px;
}

.wa-float {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 60;
  width: 52px;
  height: 52px;
  border: 1px solid var(--ink);
  border-radius: 4px;
  display: grid;
  place-items: center;
  background: var(--paper);
  color: var(--green);
}

.wa-float:hover {
  background: var(--black);
  color: var(--accent-strong);
}

.wa-float svg {
  width: 23px;
  height: 23px;
}

.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 88px;
  z-index: 60;
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border: 1px solid var(--rule);
  background: rgba(245, 242, 238, .96);
  color: var(--ink);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity .22s ease, transform .22s ease, background .22s ease, color .22s ease, border-color .22s ease;
}

.back-to-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.back-to-top:hover,
.back-to-top:focus-visible {
  border-color: var(--accent);
  background: var(--black);
  color: var(--accent-strong);
}

.back-to-top:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.back-to-top svg {
  width: 21px;
  height: 21px;
}

@media (prefers-reduced-motion: reduce) {
  .back-to-top {
    transition: none;
  }
}

.simple-page {
  min-height: calc(100vh - 76px);
  display: grid;
  align-items: center;
  padding: 96px 0;
}

@media (max-width: 1020px) {
  .hero-grid,
  .split-grid,
  .section-head,
  .legal-layout {
    grid-template-columns: 1fr;
    gap: 42px;
  }

  .metrics,
  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .industry-grid,
  .principles-grid,
  .validation-grid,
  .roi-grid,
  .system-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .system-intro {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

  .team-grid,
  .plans-grid,
  .evidence-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .plan.recommended { transform: none; }

  .legal-nav { position: static; }
}

@media (max-width: 1120px) and (min-width: 821px) {
  .brand img { height: 48px; }
  .nav { gap: 16px; }
  .nav-menu { gap: 14px; }
  .nav-menu a { font-size: 11px; }
  .nav > .btn { padding-inline: 14px; }
}

@media (max-width: 820px) {
  .nav-toggle { display: block; }

  .nav-menu {
    position: fixed;
    inset: 84px 0 auto 0;
    display: none;
    padding: 28px 20px 34px;
    border-bottom: 1px solid var(--rule);
    background: var(--paper);
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
  }

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

  .nav .btn { display: none; }

  h1 { font-size: 48px; }
  h2 { font-size: 38px; }

  .section { padding: 72px 0; }
  .sites-page .section,
  .sites-page .section-compact { padding: 64px 0; }
  .sites-page .section-tight { padding: 48px 0; }
  .hero { min-height: auto; padding: 72px 0; }

  .editorial-panel { min-height: 360px; }

  .person-card {
    min-height: auto;
  }

  .portrait {
    width: min(48%, 230px);
    min-height: 0;
  }

  .comparison {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }

  .system-cta {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 620px) {
  .container { width: min(100% - 28px, 1160px); }
  .brand img,
  .footer-brand img {
    width: auto;
    height: 46px;
  }

  .hero-actions,
  .cta-actions,
  .btn {
    width: 100%;
  }

  .metrics,
  .cards-grid,
  .industry-grid,
    .principles-grid,
    .validation-grid,
    .audience-grid,
    .roi-grid,
    .system-grid {
    grid-template-columns: 1fr;
  }

  .system-architecture { padding: 64px 0; }
  .system-intro { margin-bottom: 38px; }
  .system-stage {
    min-height: 0;
    padding: 26px 24px;
  }
  .system-label { margin-bottom: 32px; }

  .metric { min-height: 106px; }

  .step {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .plan { min-height: auto; }
  .wa-float { right: 16px; bottom: 16px; }
  .back-to-top { right: 16px; bottom: 80px; }
}