:root {
  --color-primary: #0d47a1;
  --color-primary-dark: #0a2e6e;
  --color-text: #1a2332;
  --color-text-muted: #5a6a7a;
  --color-bg: #f8f9fb;
  --color-surface: #ffffff;
  --color-border: #e2e8f0;
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, sans-serif;
  --max-width: 42rem;
  --radius: 12px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
}

a {
  color: var(--color-primary);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover {
  color: var(--color-primary-dark);
}

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 1.25rem 1.5rem;
}

.header__inner {
  max-width: calc(var(--max-width) + 3rem);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.header__logo {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  object-fit: contain;
}

.header__title {
  margin: 0;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-primary-dark);
}

.header__subtitle {
  margin: 0.15rem 0 0;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.main {
  flex: 1;
  padding: 2rem 1.5rem 3rem;
}

.article {
  max-width: var(--max-width);
  margin: 0 auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem 1.75rem;
  box-shadow: 0 1px 3px rgb(15 25 35 / 6%);
}

.article h1 {
  margin: 0 0 0.5rem;
  font-size: 1.75rem;
  line-height: 1.25;
  color: var(--color-primary-dark);
}

.effective {
  margin: 0 0 1.75rem;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.lead {
  margin: 0 0 1.75rem;
  font-size: 1.0625rem;
}

.article h2 {
  margin: 2rem 0 0.75rem;
  font-size: 1.125rem;
  color: var(--color-primary);
}

.article h2:first-of-type {
  margin-top: 0;
}

.article p {
  margin: 0 0 1rem;
}

.article ul {
  margin: 0 0 1rem;
  padding-left: 1.35rem;
}

.article li {
  margin-bottom: 0.5rem;
}

.article li:last-child {
  margin-bottom: 0;
}

.footer {
  padding: 1.5rem;
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

.footer a {
  font-weight: 500;
}

@media (max-width: 480px) {
  .article {
    padding: 1.5rem 1.25rem;
  }

  .article h1 {
    font-size: 1.5rem;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-text: #e8edf2;
    --color-text-muted: #9aa8b6;
    --color-bg: #0f1923;
    --color-surface: #1a2332;
    --color-border: #2a3a4d;
  }

  .header__title {
    color: #e8edf2;
  }

  a {
    color: #64b5f6;
  }

  a:hover {
    color: #90caf9;
  }

  .article h1,
  .article h2 {
    color: #90caf9;
  }
}