:root {
  color-scheme: light dark;
  --bg: #fbfbfd;
  --surface: #ffffff;
  --text: #1b2230;
  --muted: #4a5466;
  --border: #dde1ea;
  --accent: #2b44b0;
  --accent-hover: #1f3591;
  --on-accent: #ffffff;
  --notice-bg: #eef1fb;
  --notice-border: #2b44b0;
  --badge-bg: #e3f4f1;
  --badge-text: #0b5f54;
  --focus: #2b44b0;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12151c;
    --surface: #1a1f29;
    --text: #e8ebf2;
    --muted: #aab2c2;
    --border: #2e3543;
    --accent: #9db0ff;
    --accent-hover: #c0ccff;
    --on-accent: #12151c;
    --notice-bg: #1c2440;
    --notice-border: #9db0ff;
    --badge-bg: #133a35;
    --badge-text: #8fe0d2;
    --focus: #9db0ff;
  }
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    system-ui,
    -apple-system,
    'Segoe UI',
    Roboto,
    'Helvetica Neue',
    Arial,
    sans-serif;
  font-size: 1.0625rem;
  line-height: 1.6;
}

a {
  color: var(--accent);
  text-underline-offset: 0.15em;
}

a:hover {
  color: var(--accent-hover);
}

a:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  padding: 0.5rem 0.75rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
}

.skip-link:focus {
  top: 0.75rem;
}

.container {
  width: 100%;
  max-width: 60rem;
  margin: 0 auto;
  padding: 0 1rem;
}

@media (min-width: 40rem) {
  .container {
    padding: 0 1.5rem;
  }
}

/* Header */

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

.site-header .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding-top: 0.875rem;
  padding-bottom: 0.875rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.brand:hover {
  color: var(--text);
}

.brand img {
  width: 1.75rem;
  height: 1.75rem;
}

.site-nav ul {
  display: flex;
  gap: 1.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav a {
  color: var(--muted);
  font-size: 0.9375rem;
  text-decoration: none;
}

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

/* Trademark notice: readable, in its own band near the top of every page. */

.notice {
  background: var(--notice-bg);
  border-bottom: 1px solid var(--border);
}

.notice p {
  margin: 0;
  padding: 0.75rem 0 0.75rem 0.875rem;
  border-left: 4px solid var(--notice-border);
  color: var(--text);
  font-size: 0.9375rem;
  line-height: 1.5;
}

.notice .container {
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
}

/* Home */

.hero {
  padding-top: 3.5rem;
  padding-bottom: 2.5rem;
}

.badge {
  display: inline-block;
  margin: 0 0 1rem;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  background: var(--badge-bg);
  color: var(--badge-text);
  font-size: 0.875rem;
  font-weight: 600;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.5rem, 7vw, 3.5rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.lede {
  max-width: 36rem;
  margin: 0.75rem 0 0;
  color: var(--muted);
  font-size: clamp(1.1875rem, 3vw, 1.375rem);
  line-height: 1.4;
}

.intro {
  max-width: 38rem;
  margin: 1.25rem 0 0;
}

.cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
  margin-top: 1.75rem;
}

.cta p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9375rem;
}

.button {
  display: inline-block;
  padding: 0.7rem 1.25rem;
  border-radius: 8px;
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 600;
  text-decoration: none;
}

.button:hover {
  background: var(--accent-hover);
  color: var(--on-accent);
}

.features {
  padding-top: 1rem;
  padding-bottom: 3.5rem;
}

.features h2 {
  margin: 0 0 1rem;
  font-size: 1.375rem;
}

.feature-list {
  display: grid;
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 48rem) {
  .feature-list {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-list li {
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
}

.feature-list h3 {
  margin: 0 0 0.4rem;
  font-size: 1.0625rem;
}

.feature-list p {
  margin: 0;
  color: var(--muted);
  font-size: 0.975rem;
}

/* Legal pages */

.legal {
  max-width: 44rem;
  padding: 2.5rem 0 3.5rem;
}

.legal h1 {
  margin: 0;
  font-size: clamp(1.875rem, 5vw, 2.375rem);
  line-height: 1.2;
  letter-spacing: -0.015em;
}

.updated {
  margin: 0.5rem 0 1.5rem;
  color: var(--muted);
  font-size: 0.9375rem;
}

.status {
  margin: 0 0 1.5rem;
  padding: 0.875rem 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
}

.legal h2 {
  margin: 2rem 0 0.5rem;
  font-size: 1.25rem;
  line-height: 1.3;
}

.legal ul {
  padding-left: 1.25rem;
}

.legal li + li {
  margin-top: 0.4rem;
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  font-size: 0.9375rem;
}

.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding-top: 1.25rem;
  padding-bottom: 1.25rem;
}

.site-footer p {
  margin: 0;
}

.site-footer ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}