:root {
  --base-white: #ffffff;
  --slate-grey: #f8fafc;
  --border-grey: #e2e8f0;
  --charcoal-dark: #0f172a;
  --text-muted: #475569;
  --kinetic-orange: #ea580c;
  --white-muted: #cbd5e1;
  --max-width: 1180px;
  --header-height: 72px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--base-white);
  color: var(--charcoal-dark);
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.65;
}

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

button,
input,
select {
  font: inherit;
}

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
  padding: 0 clamp(20px, 4vw, 56px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.18);
  background: rgba(15, 23, 42, 0.96);
  color: var(--base-white);
}

.logo-ideus {
  display: inline-flex;
  align-items: center;
  font-family: "Plus Jakarta Sans", "Inter", sans-serif;
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  color: currentColor;
}

.kinetic-dot {
  color: var(--kinetic-orange);
}

.main-nav {
  display: flex;
  justify-content: center;
  gap: 28px;
  font-size: 14px;
  font-weight: 700;
}

.main-nav a {
  color: var(--white-muted);
}

.main-nav a:hover {
  color: var(--base-white);
}

.language-switcher {
  display: flex;
  border: 1px solid rgba(226, 232, 240, 0.26);
}

.language-button {
  width: 42px;
  min-height: 34px;
  border: 0;
  border-right: 1px solid rgba(226, 232, 240, 0.26);
  background: transparent;
  color: var(--white-muted);
  cursor: pointer;
  font-size: 12px;
  font-weight: 800;
}

.language-button:last-child {
  border-right: 0;
}

.language-button.is-active {
  background: var(--base-white);
  color: var(--charcoal-dark);
}

.section-inner {
  width: min(var(--max-width), calc(100% - 40px));
  margin: 0 auto;
}

.section-dark,
.section-light,
.section-grey {
  padding: clamp(76px, 9vw, 124px) 0;
}

.section-dark {
  background: var(--charcoal-dark);
  color: var(--base-white);
}

.section-light {
  background: var(--base-white);
}

.section-grey {
  background: var(--slate-grey);
}

.hero {
  min-height: 92vh;
  padding-top: calc(var(--header-height) + clamp(38px, 5vw, 72px));
  display: flex;
  align-items: center;
}

.hero-grid,
.founder-grid,
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: clamp(36px, 6vw, 80px);
  align-items: center;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--kinetic-orange);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: "Plus Jakarta Sans", "Inter", sans-serif;
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: 0;
}

h1 {
  max-width: 980px;
  font-size: clamp(34px, 3.6vw, 48px);
}

h2 {
  max-width: 880px;
  font-size: clamp(30px, 4vw, 52px);
}

h3 {
  font-size: 22px;
}

h4 {
  font-size: 14px;
  text-transform: uppercase;
}

p {
  margin: 0;
  color: var(--text-muted);
}

.section-dark p {
  color: var(--white-muted);
}

.hero-lead {
  margin-top: 22px;
  max-width: 760px;
  color: var(--base-white);
  font-size: clamp(18px, 1.6vw, 22px);
  line-height: 1.45;
}

.hero-text {
  margin-top: 18px;
  max-width: 730px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 13px 18px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-weight: 800;
  line-height: 1.25;
  cursor: pointer;
}

.button-primary {
  background: var(--kinetic-orange);
  color: var(--base-white);
}

.button-secondary {
  border-color: rgba(226, 232, 240, 0.35);
  color: var(--base-white);
}

.hero-panel {
  border: 1px solid rgba(226, 232, 240, 0.26);
  padding: 28px;
}

.system-frame {
  position: relative;
  display: grid;
  gap: 14px;
}

.system-frame::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 22px;
  bottom: 22px;
  width: 1px;
  background: rgba(226, 232, 240, 0.35);
}

.system-frame span {
  position: relative;
  display: block;
  padding: 16px 16px 16px 44px;
  border: 1px solid rgba(226, 232, 240, 0.26);
  color: var(--base-white);
  font-weight: 800;
}

.system-frame span::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 50%;
  width: 12px;
  height: 12px;
  border: 1px solid var(--border-grey);
  background: var(--charcoal-dark);
  transform: translateY(-50%);
}

.system-frame .approval-node::before {
  border-color: var(--kinetic-orange);
  background: var(--kinetic-orange);
}

.section-heading {
  display: grid;
  gap: 18px;
  margin-bottom: 42px;
}

.section-heading p:not(.eyebrow) {
  max-width: 760px;
  font-size: 18px;
}

.two-column,
.card-grid,
.module-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

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

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

.flat-card,
.metric-card,
.module-card,
.example-card,
.rule-card {
  border: 1px solid var(--border-grey);
  border-radius: 2px;
  background: var(--base-white);
  padding: 24px;
}

.section-grey .flat-card,
.section-grey .metric-card,
.section-grey .module-card {
  background: var(--base-white);
}

.flat-card h3,
.metric-card h3,
.module-card h3,
.example-card h3,
.rule-card h3 {
  margin-bottom: 16px;
}

ul {
  margin: 0;
  padding-left: 20px;
  color: var(--text-muted);
}

li + li {
  margin-top: 10px;
}

.thesis {
  padding: 34px 0;
  border-top: 1px solid var(--border-grey);
  border-bottom: 1px solid var(--border-grey);
  background: var(--base-white);
}

.thesis p {
  max-width: 1040px;
  color: var(--charcoal-dark);
  font-family: "Plus Jakarta Sans", "Inter", sans-serif;
  font-size: clamp(24px, 3vw, 38px);
  font-weight: 800;
  line-height: 1.2;
}

.thesis strong {
  color: var(--kinetic-orange);
}

.founder-grid {
  grid-template-columns: 320px minmax(0, 1fr);
}

.portrait-block {
  border: 1px solid var(--border-grey);
  background: var(--slate-grey);
  padding: 24px;
}

.portrait-mark {
  display: grid;
  place-items: center;
  aspect-ratio: 1;
  border: 1px solid var(--border-grey);
  background: var(--charcoal-dark);
  color: var(--base-white);
  font-family: "Plus Jakarta Sans", "Inter", sans-serif;
  font-size: 64px;
  font-weight: 800;
}

.portrait-block p {
  margin-top: 16px;
  font-weight: 700;
}

blockquote {
  margin: 28px 0 0;
  padding: 0;
  border-left: 3px solid var(--kinetic-orange);
}

blockquote p {
  padding-left: 22px;
  font-size: 18px;
}

blockquote p + p {
  margin-top: 18px;
}

.symptom-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.symptom-item {
  border: 1px solid var(--border-grey);
  background: var(--base-white);
  padding: 16px;
  color: var(--charcoal-dark);
  font-weight: 700;
}

.diagnostic-note,
.nda-note {
  margin-top: 24px;
  border-left: 3px solid var(--kinetic-orange);
  padding-left: 18px;
  color: var(--charcoal-dark);
  font-weight: 700;
}

.metric-card {
  padding: 20px;
}

.metric-card .metric {
  margin-top: 18px;
  color: var(--kinetic-orange);
  font-family: "Plus Jakarta Sans", "Inter", sans-serif;
  font-size: 28px;
  font-weight: 800;
  line-height: 1.1;
}

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

.workflow-diagram {
  display: grid;
  grid-template-columns: minmax(130px, 1fr) 42px minmax(160px, 1.4fr) 42px minmax(160px, 1.2fr) 42px minmax(130px, 1fr);
  align-items: center;
  margin-bottom: 18px;
  border: 1px solid var(--border-grey);
  background: var(--base-white);
  padding: 20px;
}

.workflow-node {
  min-height: 72px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border-grey);
  padding: 12px;
  text-align: center;
  font-weight: 800;
}

.workflow-line {
  height: 1px;
  background: var(--border-grey);
}

.workflow-approval {
  border-color: var(--kinetic-orange);
}

.workflow-approval::before {
  content: "";
  width: 10px;
  height: 10px;
  margin-bottom: 8px;
  background: var(--kinetic-orange);
}

.contrast-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.kpi-card .kpi-item {
  border-top: 1px solid var(--border-grey);
  padding: 15px 0;
  color: var(--charcoal-dark);
  font-family: "Plus Jakarta Sans", "Inter", sans-serif;
  font-size: 24px;
  font-weight: 800;
}

.checklist {
  display: grid;
  gap: 12px;
  margin-top: 34px;
}

.rule-card {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 14px;
  align-items: start;
}

.rule-card::before {
  content: "";
  width: 12px;
  height: 12px;
  margin-top: 7px;
  background: var(--kinetic-orange);
}

.rule-card p {
  grid-column: 2;
}

.module-card .module-letter {
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  margin-bottom: 18px;
  border: 1px solid var(--charcoal-dark);
  color: var(--charcoal-dark);
  font-family: "Plus Jakarta Sans", "Inter", sans-serif;
  font-weight: 800;
}

.example-card .button {
  margin-top: 20px;
  color: var(--base-white);
}

.comparison-table {
  display: grid;
  border: 1px solid var(--border-grey);
  background: var(--base-white);
}

.comparison-row {
  display: grid;
  grid-template-columns: 0.75fr 1fr 1fr;
  border-bottom: 1px solid var(--border-grey);
}

.comparison-row:last-child {
  border-bottom: 0;
}

.comparison-cell {
  padding: 18px;
  border-right: 1px solid var(--border-grey);
  color: var(--text-muted);
}

.comparison-cell:last-child {
  border-right: 0;
}

.comparison-head .comparison-cell {
  background: var(--charcoal-dark);
  color: var(--base-white);
  font-weight: 800;
}

.contact-grid {
  align-items: start;
}

.contact-grid p {
  margin-top: 20px;
  max-width: 620px;
}

.diagnostic-form {
  display: grid;
  gap: 16px;
  border: 1px solid var(--border-grey);
  background: var(--slate-grey);
  padding: 24px;
}

.diagnostic-form label {
  display: grid;
  gap: 7px;
  color: var(--charcoal-dark);
  font-weight: 800;
}

.diagnostic-form input,
.diagnostic-form select {
  width: 100%;
  min-height: 48px;
  border: 1px solid var(--border-grey);
  border-radius: 2px;
  background: var(--base-white);
  color: var(--charcoal-dark);
  padding: 10px 12px;
}

.site-footer {
  padding: 42px 0;
  background: var(--charcoal-dark);
  color: var(--base-white);
}

.footer-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 36px;
}

.site-footer p {
  margin-top: 16px;
  color: var(--white-muted);
}

.narrow {
  max-width: 900px;
}

.section-link-row {
  margin-top: 24px;
}

.text-link,
.back-link {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  border-bottom: 2px solid var(--kinetic-orange);
  color: var(--charcoal-dark);
  font-weight: 800;
}

.section-dark .back-link {
  margin-bottom: 42px;
  color: var(--base-white);
}

.page-shell {
  padding-top: var(--header-height);
}

.page-hero {
  min-height: 52vh;
  display: flex;
  align-items: center;
}

.page-hero h1 {
  max-width: 860px;
}

.page-hero .hero-lead {
  max-width: 820px;
}

.page-content {
  display: grid;
  gap: 18px;
  max-width: 920px;
}

.page-section-block {
  border: 1px solid var(--border-grey);
  border-radius: 2px;
  padding: 28px;
  background: var(--base-white);
}

.page-section-block h2 {
  margin-bottom: 14px;
  font-size: clamp(24px, 3vw, 34px);
}

.page-section-block p,
.page-section-block ul {
  font-size: 18px;
}

@media (max-width: 1080px) {
  .card-grid,
  .symptom-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .workflow-diagram {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .workflow-line {
    width: 1px;
    height: 22px;
    margin: 0 auto;
  }
}

@media (max-width: 780px) {
  :root {
    --header-height: auto;
  }

  .site-header {
    position: static;
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 18px 20px;
  }

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

  .hero {
    min-height: auto;
    padding-top: 64px;
  }

  .hero-grid,
  .founder-grid,
  .contact-grid,
  .two-column,
  .module-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .card-grid,
  .symptom-list {
    grid-template-columns: 1fr;
  }

  .contrast-columns,
  .comparison-row {
    grid-template-columns: 1fr;
  }

  .comparison-cell {
    border-right: 0;
    border-bottom: 1px solid var(--border-grey);
  }

  .comparison-cell:last-child {
    border-bottom: 0;
  }

  .button {
    width: 100%;
  }
}