/* Shared by the plain HTML site pages (not the web app). Colours match the
   app's blue and slate. */

:root {
  --text: #0f172a;
  --body: #334155;
  --muted: #64748b;
  --brand: #2563eb;
  --brand-dark: #1d4ed8;
  --tint: #eff6ff;
  --background: #ffffff;
  --border: #e2e8f0;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  color: var(--body);
  background: var(--background);
  overflow-wrap: break-word;
}

a {
  color: var(--brand);
}

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

/* Header */

.site-header {
  border-bottom: 1px solid var(--border);
}

.bar {
  max-width: 760px;
  margin: 0 auto;
  padding: 12px 16px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 16px;
}

.brand {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

.site-header nav,
.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  font-size: 15px;
}

.site-header nav a {
  color: var(--body);
  text-decoration: none;
  padding: 4px 0;
}

.site-header nav a:hover,
.site-header nav a[aria-current='page'] {
  color: var(--brand);
}

.site-header nav a[aria-current='page'] {
  font-weight: 600;
}

/* Content */

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 8px 16px 40px;
}

h1,
h2,
h3 {
  color: var(--text);
  line-height: 1.25;
}

h1 {
  font-size: 34px;
  margin: 24px 0 12px;
}

h2 {
  font-size: 23px;
  margin: 36px 0 8px;
}

h3 {
  font-size: 18px;
  margin: 24px 0 4px;
}

ul {
  padding-left: 22px;
}

li + li {
  margin-top: 6px;
}

/* Home page intro */

.hero {
  margin: 0 -16px;
  padding: 16px 16px 28px;
  background: var(--tint);
  border-radius: 0 0 12px 12px;
}

.hero h1 {
  font-size: 40px;
  margin-top: 16px;
  margin-bottom: 4px;
}

.tagline {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 8px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.actions[hidden] {
  display: none;
}

.button {
  display: inline-block;
  min-width: 140px;
  padding: 12px 24px;
  border-radius: 8px;
  border: 1px solid var(--brand);
  font-size: 17px;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
}

.button.primary {
  background: var(--brand);
  color: #ffffff;
}

.button.primary:hover {
  background: var(--brand-dark);
  border-color: var(--brand-dark);
  color: #ffffff;
}

.button.secondary {
  background: var(--background);
  color: var(--brand);
}

.button.secondary:hover {
  background: var(--tint);
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--border);
  max-width: 760px;
  margin: 0 auto;
  padding: 16px 16px 32px;
}

.company {
  font-size: 14px;
  font-style: italic;
  color: var(--muted);
}

@media (max-width: 480px) {
  .button {
    flex: 1 1 100%;
  }

  h1,
  .hero h1 {
    font-size: 30px;
  }
}