:root {
  --surface: #FFFFFF;
  --neutral: #F7F7F8;
  --ink: #101114;
  --muted: #5D626D;
  --line: #D9DDE5;
  --accent: #002FA7;
  --accent-dark: #001E6E;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--surface);
  color: var(--ink);
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  line-height: 1.5;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  padding: 0 32px;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
}

.brand {
  color: var(--accent);
  font-size: 22px;
  font-weight: 900;
}

nav {
  display: flex;
  gap: 22px;
  color: var(--muted);
  font-size: 14px;
}

nav a:hover,
nav a:focus {
  color: var(--accent);
}

.hero,
.positioning,
.demo-section,
.run-section,
.submit-section,
.validation-section {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
  gap: 42px;
  min-height: calc(100vh - 64px);
  padding: 72px 0 46px;
  align-items: center;
  border-bottom: 1px solid var(--line);
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 120px 120px;
  background-position: -1px -1px;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 900;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  max-width: 780px;
  margin-bottom: 24px;
  font-size: clamp(42px, 6vw, 78px);
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 12px;
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.04;
  letter-spacing: 0;
}

.hero-text,
.section-heading p,
.positioning p {
  color: var(--muted);
  font-size: 17px;
}

.actions,
.demo-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.actions {
  margin-top: 32px;
}

.button,
.demo-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border: 1px solid var(--ink);
  border-radius: 4px;
  font-weight: 900;
}

.button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #FFFFFF;
}

.button.primary:hover,
.button.primary:focus {
  background: var(--accent-dark);
}

.button.secondary,
.demo-links a {
  background: #FFFFFF;
}

.system-panel {
  background: #FFFFFF;
  border: 1px solid var(--ink);
  border-radius: 6px;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--ink);
}

.panel-header strong {
  color: var(--accent);
}

.flow-grid {
  display: grid;
  grid-template-columns: 1fr;
}

.flow-grid div {
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
  font-weight: 800;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 0;
  border-top: 1px solid var(--ink);
}

.metrics div {
  padding: 18px;
  border-right: 1px solid var(--ink);
}

.metrics div:last-child {
  border-right: 0;
}

dt {
  color: var(--muted);
  font-size: 13px;
}

dd {
  margin: 4px 0 0;
  color: var(--accent);
  font-size: 34px;
  font-weight: 900;
}

.positioning {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 22px;
  border: 1px solid var(--ink);
  border-right: 0;
}

.positioning div {
  min-height: 210px;
  padding: 24px;
  border-right: 1px solid var(--ink);
}

.demo-section,
.run-section,
.submit-section,
.validation-section {
  padding: 76px 0;
  border-bottom: 1px solid var(--line);
}

.section-heading {
  max-width: 780px;
  margin-bottom: 28px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 26px 32px;
  color: var(--muted);
  font-size: 14px;
}

.request-form {
  max-width: 860px;
  padding: 24px;
  border: 1px solid var(--ink);
  border-radius: 6px;
  background: #FFFFFF;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

label,
fieldset {
  display: block;
  margin: 0 0 18px;
}

label span,
legend {
  display: block;
  margin-bottom: 7px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 900;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: #FFFFFF;
  color: var(--ink);
  font: inherit;
  padding: 11px 12px;
}

textarea {
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

fieldset {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 6px;
}

.check {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 14px;
}

.check input {
  width: auto;
}

.form-status {
  min-height: 24px;
  margin: 14px 0 0;
  color: var(--accent);
  font-weight: 800;
}

@media (max-width: 900px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
    padding: 14px 20px;
  }

  nav {
    flex-wrap: wrap;
    gap: 12px;
  }

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

  .hero {
    min-height: auto;
    padding-top: 48px;
  }

  .positioning {
    border-right: 1px solid var(--ink);
  }

  .positioning div {
    border-right: 0;
    border-bottom: 1px solid var(--ink);
  }

  .positioning div:last-child {
    border-bottom: 0;
  }
}

@media (max-width: 560px) {
  .hero,
  .positioning,
  .demo-section,
  .run-section,
  .submit-section,
  .validation-section {
    width: min(100% - 24px, 1180px);
  }

  h1 {
    font-size: 42px;
  }

  .metrics {
    grid-template-columns: 1fr;
  }

  .metrics div {
    border-right: 0;
    border-bottom: 1px solid var(--ink);
  }

  .metrics div:last-child {
    border-bottom: 0;
  }

  .site-footer {
    flex-direction: column;
    padding: 24px 12px;
  }
}