:root {
  --ink: #15202b;
  --muted: #52616b;
  --paper: #ffffff;
  --wash: #f4f7f2;
  --line: #d8e0d2;
  --green: #276749;
  --green-dark: #174633;
  --gold: #d99a22;
  --blue: #2563eb;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px clamp(16px, 4vw, 48px);
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(21, 32, 43, 0.08);
}

.brand {
  font-weight: bold;
  font-size: 18px;
}

nav {
  display: flex;
  align-items: center;
  gap: clamp(10px, 2vw, 22px);
  font-size: 14px;
}

.nav-action {
  color: var(--green);
  font-weight: bold;
}

.hero {
  min-height: 92vh;
  display: flex;
  align-items: center;
  padding: 96px clamp(18px, 6vw, 72px) 72px;
  background:
    linear-gradient(90deg, rgba(8, 16, 24, 0.74) 0%, rgba(8, 16, 24, 0.48) 42%, rgba(8, 16, 24, 0.14) 100%),
    url("assets/rural-route-hero.png") center / cover;
  color: white;
}

.hero-content {
  max-width: 680px;
}

.eyebrow {
  margin: 0 0 10px 0;
  font-size: 13px;
  font-weight: bold;
  letter-spacing: 0;
  text-transform: uppercase;
  color: var(--gold);
}

.hero h1 {
  margin: 0;
  font-size: clamp(46px, 8vw, 84px);
  line-height: 0.95;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 570px;
  margin: 20px 0 0 0;
  font-size: clamp(18px, 2.2vw, 22px);
  line-height: 1.45;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.primary-action,
.secondary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 18px;
  border-radius: 8px;
  font-weight: bold;
}

.primary-action {
  background: var(--green);
  color: white;
}

.primary-action:hover {
  background: var(--green-dark);
}

.secondary-action {
  background: rgba(255, 255, 255, 0.16);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.4);
}

.section {
  padding: 68px clamp(18px, 6vw, 72px);
}

.section-inner {
  max-width: 1120px;
  margin: 0 auto;
}

.section-heading {
  max-width: 720px;
}

.section h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.1;
  letter-spacing: 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.feature {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
  background: var(--paper);
}

.feature h3,
.tester-panel h3 {
  margin: 0 0 8px 0;
  font-size: 18px;
}

.feature p,
.testing-layout p,
.tester-panel li {
  color: var(--muted);
  line-height: 1.5;
}

.testing-section {
  background: var(--wash);
}

.testing-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 28px;
  align-items: start;
}

.tester-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
  background: white;
}

.tester-panel ul {
  padding-left: 20px;
  margin: 10px 0 18px 0;
}

.secondary-panel-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  margin-left: 8px;
  padding: 12px 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
  color: var(--green);
  font: inherit;
  font-weight: bold;
  cursor: pointer;
}

.tester-email {
  margin: 10px 0 0 0;
  font-size: 13px;
  color: var(--muted);
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 24px clamp(18px, 6vw, 72px);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

footer a {
  color: var(--green);
  font-weight: bold;
}

@media (max-width: 820px) {
  .site-header {
    position: static;
  }

  nav a:not(.nav-action) {
    display: none;
  }

  .hero {
    min-height: 86vh;
    padding-top: 56px;
    background:
      linear-gradient(180deg, rgba(8, 16, 24, 0.78) 0%, rgba(8, 16, 24, 0.42) 100%),
      url("assets/rural-route-hero.png") center / cover;
  }

  .feature-grid,
  .testing-layout {
    grid-template-columns: 1fr;
  }

  .section {
    padding-top: 48px;
    padding-bottom: 48px;
  }
}