:root {
  color-scheme: light;
  --ink: #171717;
  --muted: #5e646b;
  --line: #d9dee5;
  --paper: #ffffff;
  --soft: #f4f7f8;
  --accent: #007f8f;
  --accent-2: #e23a5b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
}

a {
  color: var(--accent);
  text-underline-offset: 0.18em;
}

.page {
  min-height: 100vh;
}

.intro {
  max-width: 920px;
  padding: 88px 32px 72px;
  margin: 0 auto;
}

.app-icon {
  display: block;
  border-radius: 22px;
  box-shadow: 0 18px 42px rgba(18, 26, 32, 0.16);
}

.eyebrow {
  margin: 28px 0 10px;
  color: var(--accent);
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  max-width: 820px;
  font-size: 3rem;
  line-height: 1.05;
  letter-spacing: 0;
}

.lead {
  margin: 22px 0 0;
  max-width: 720px;
  color: var(--muted);
  font-size: 1.18rem;
}

.content-band {
  border-top: 1px solid var(--line);
}

.content-band.muted {
  background: var(--soft);
}

.content {
  max-width: 920px;
  padding: 38px 32px;
  margin: 0 auto;
}

.content h2,
.doc-body h2 {
  margin: 0 0 12px;
  font-size: 1.2rem;
  line-height: 1.25;
  letter-spacing: 0;
}

.content p,
.doc-body p {
  margin: 0 0 16px;
  color: var(--muted);
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 28px;
}

.document {
  background: var(--paper);
}

.doc-header {
  max-width: 880px;
  padding: 56px 32px 28px;
  margin: 0 auto;
  border-bottom: 1px solid var(--line);
}

.doc-header h1 {
  margin-top: 16px;
  font-size: 2.4rem;
}

.doc-header p {
  margin: 14px 0 0;
  color: var(--muted);
}

.back-link {
  font-weight: 700;
  text-decoration: none;
}

.doc-body {
  max-width: 880px;
  padding: 34px 32px 72px;
  margin: 0 auto;
}

.doc-body h2 {
  margin-top: 28px;
}

@media (max-width: 640px) {
  .intro {
    padding: 56px 22px 48px;
  }

  h1,
  .doc-header h1 {
    font-size: 2rem;
  }

  .lead {
    font-size: 1rem;
  }

  .content,
  .doc-header,
  .doc-body {
    padding-left: 22px;
    padding-right: 22px;
  }
}