:root {
  color-scheme: light dark;
  --color-page: #f5f7fa;
  --color-surface: #ffffff;
  --color-text: #102a43;
  --color-muted: #52667a;
  --color-border: #cbd5df;
  --color-accent: #087f73;
  --color-accent-strong: #06685f;
  --color-focus: #b54708;
  --color-note: #e8f3f1;
  --shadow-small: 0 2px 8px rgb(16 42 67 / 10%);
  --radius-small: 8px;
  --radius-medium: 16px;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --content-width: 760px;
}

* {
  box-sizing: border-box;
}

html {
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  background: var(--color-page);
  color: var(--color-text);
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  font-size: 1rem;
}

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

a:hover {
  text-decoration-thickness: 0.14em;
}

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

code {
  overflow-wrap: anywhere;
  font-size: 0.94em;
}

h1,
h2,
h3,
p {
  margin-block-start: 0;
}

h1 {
  max-width: 18ch;
  margin-block-end: var(--space-2);
  font-size: clamp(2.25rem, 6vw, 3.75rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
}

h2 {
  margin-block-end: var(--space-2);
  font-size: clamp(1.45rem, 3vw, 1.85rem);
  line-height: 1.25;
}

h3 {
  margin-block-end: var(--space-1);
  font-size: 1.1rem;
  line-height: 1.35;
}

.shell {
  width: min(100% - 32px, var(--content-width));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  z-index: 10;
  inset-block-start: var(--space-1);
  inset-inline-start: var(--space-1);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-small);
  background: var(--color-text);
  color: var(--color-surface);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

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

.header-row {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.brand {
  color: var(--color-text);
  font-size: 1.2rem;
  font-weight: 750;
  text-decoration: none;
}

nav {
  display: flex;
  gap: var(--space-2);
}

nav a {
  padding-block: 4px;
  color: var(--color-text);
  font-weight: 650;
}

nav a[aria-current="page"] {
  text-decoration-thickness: 0.16em;
}

main > section,
main.policy {
  padding-block: var(--space-5);
}

main > section + section {
  border-block-start: 1px solid var(--color-border);
}

.intro {
  padding-block: clamp(48px, 8vw, 80px);
}

.eyebrow {
  margin-block-end: var(--space-1);
  color: var(--color-muted);
  font-size: 0.85rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.lead {
  max-width: 60ch;
  margin-block-end: var(--space-3);
  color: var(--color-muted);
  font-size: clamp(1.1rem, 2.4vw, 1.3rem);
}

.button {
  display: inline-block;
  min-height: 44px;
  padding: 10px var(--space-2);
  border: 2px solid var(--color-accent-strong);
  border-radius: var(--radius-small);
  background: var(--color-accent);
  color: #ffffff;
  font-weight: 750;
  text-decoration: none;
}

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

.steps {
  padding-inline-start: var(--space-3);
}

.steps li + li {
  margin-block-start: var(--space-1);
}

.notice {
  margin-block-start: var(--space-3);
  padding: var(--space-2);
  border-inline-start: 4px solid var(--color-accent);
  border-radius: 0 var(--radius-small) var(--radius-small) 0;
  background: var(--color-note);
}

.facts {
  display: grid;
  gap: var(--space-2);
}

.facts article {
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background: var(--color-surface);
  box-shadow: var(--shadow-small);
}

.facts article p:last-child,
.site-footer p:last-child,
.policy section p:last-child {
  margin-block-end: 0;
}

.policy > .lead {
  margin-block-end: var(--space-5);
}

.policy section + section {
  margin-block-start: var(--space-4);
}

.site-footer {
  padding-block: var(--space-4);
  border-block-start: 1px solid var(--color-border);
  color: var(--color-muted);
  background: var(--color-surface);
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-page: #0d1b2a;
    --color-surface: #13263a;
    --color-text: #f3f7fb;
    --color-muted: #bdc9d5;
    --color-border: #3a5168;
    --color-accent: #35b6a7;
    --color-accent-strong: #7bd7cc;
    --color-focus: #ffb45c;
    --color-note: #173b3a;
    --shadow-small: 0 2px 8px rgb(0 0 0 / 28%);
  }

  .button {
    border-color: var(--color-accent);
    background: #087f73;
    color: #ffffff;
  }
}

@media (max-width: 480px) {
  .header-row {
    min-height: 64px;
  }

  .shell {
    width: min(100% - 24px, var(--content-width));
  }

  nav {
    gap: 12px;
  }

  main > section,
  main.policy {
    padding-block: var(--space-4);
  }

  .facts article {
    padding: var(--space-2);
  }
}