:root {
  color-scheme: light;
  --ink: #152019;
  --muted: #5c6b61;
  --surface: #ffffff;
  --soft: #f4f7f2;
  --line: #dfe7dd;
  --green: #1f7a4c;
  --green-dark: #145a39;
  --orange: #e88c2d;
  --blue: #2d6cdf;
  --shadow: 0 20px 60px rgba(21, 32, 25, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  font-family:
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  color: var(--ink);
  background: var(--soft);
}

body {
  margin: 0;
  min-height: 100vh;
}

a {
  color: var(--green-dark);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

.site-header,
.site-footer {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-header {
  padding: 22px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-weight: 800;
  font-size: 1.25rem;
  text-decoration: none;
}

.brand img {
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(232, 140, 45, 0.22);
}

.top-nav {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.top-nav a {
  color: var(--muted);
  font-weight: 700;
  text-decoration: none;
  padding: 10px 12px;
  border-radius: 8px;
}

.top-nav a:hover,
.top-nav a[aria-current="page"] {
  color: var(--ink);
  background: rgba(31, 122, 76, 0.1);
}

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

.hero {
  min-height: 72vh;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.75fr);
  align-items: center;
  gap: 48px;
  padding: 44px 0 70px;
}

.hero-copy h1,
.page-title h1 {
  margin: 0;
  font-size: 5rem;
  line-height: 1.02;
  letter-spacing: 0;
}

.hero-copy p,
.page-title p,
.split-section p {
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.8;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--green-dark);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 18px;
  border-radius: 8px;
  font-weight: 800;
  text-decoration: none;
}

.button.primary {
  color: #fff;
  background: var(--green-dark);
}

.button.secondary {
  color: var(--green-dark);
  background: #fff;
  border: 1px solid var(--line);
}

.device-panel {
  background:
    radial-gradient(circle at 20% 20%, rgba(232, 140, 45, 0.18), transparent 28%),
    linear-gradient(145deg, #ffffff, #eef5ea);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 34px;
  box-shadow: var(--shadow);
}

.app-icon {
  width: 108px;
  height: 108px;
  border-radius: 24px;
  display: block;
  margin: 0 auto 28px;
}

.signal-map {
  display: grid;
  gap: 12px;
}

.signal-map span {
  display: block;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.78);
  font-weight: 800;
}

.device-panel p {
  margin: 24px 0 0;
  color: var(--muted);
  text-align: center;
  font-weight: 700;
}

.section,
.split-section,
.content-page {
  padding: 64px 0;
}

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

.section-heading h2,
.split-section h2,
.info-section h2 {
  margin: 0 0 16px;
  font-size: 2.3rem;
  line-height: 1.18;
  letter-spacing: 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 28px;
}

.feature-grid.compact {
  margin-top: 16px;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
}

.feature-card h3 {
  margin: 0 0 10px;
  font-size: 1.1rem;
}

.feature-card p,
.info-section p,
.info-section li {
  color: var(--muted);
  line-height: 1.75;
}

.split-section {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  border-top: 1px solid var(--line);
}

.split-section > div {
  max-width: 700px;
}

.content-page {
  max-width: 860px;
}

.page-title {
  padding: 40px 0 32px;
}

.page-title h1 {
  font-size: 3.6rem;
}

.info-section {
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 28px;
  margin: 18px 0;
}

.info-section.warning {
  border-color: rgba(232, 140, 45, 0.45);
  background: rgba(255, 247, 237, 0.86);
}

.check-list,
.number-list {
  margin: 0;
  padding-left: 1.3rem;
}

.check-list li,
.number-list li {
  margin: 10px 0;
}

.inline-note {
  display: block;
  margin-top: 6px;
  color: var(--green-dark);
  font-weight: 700;
}

code {
  padding: 0.15em 0.35em;
  border-radius: 6px;
  background: #e8eee5;
  color: var(--ink);
}

.site-footer {
  padding: 28px 0 42px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.site-footer a {
  color: var(--muted);
  font-weight: 700;
}

@media (max-width: 820px) {
  .site-header,
  .site-footer,
  .split-section {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero {
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 30px;
    padding-top: 24px;
  }

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

  .hero-copy h1,
  .page-title h1 {
    font-size: 2.5rem;
  }

  .section-heading h2,
  .split-section h2,
  .info-section h2 {
    font-size: 1.8rem;
  }
}