/* The public site's only stylesheet (ADR-0028): no framework, no fonts or files from anywhere else. */

:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #15171c;
  --muted: #586070;
  --line: #e2e5ea;
  --card: #f5f6f8;
  --accent: #2748c9;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --fg: #e9ebef;
    --muted: #9aa3b2;
    --line: #272b34;
    --card: #171a21;
    --accent: #93a8ff;
  }
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font:
    1rem/1.65 system-ui,
    -apple-system,
    "Segoe UI",
    Roboto,
    "Helvetica Neue",
    Arial,
    sans-serif;
}

a {
  color: var(--accent);
  text-underline-offset: 0.2em;
}

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

.wrap {
  max-width: 44rem;
  margin-inline: auto;
  padding-inline: 1.25rem;
}

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

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.875rem;
}

.brand {
  color: var(--fg);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.site-header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.9375rem;
}

main {
  padding-block: 2.5rem 3.5rem;
}

h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.75rem, 6vw, 2.5rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

h2 {
  margin: 2.75rem 0 0.75rem;
  font-size: 1.25rem;
  line-height: 1.3;
}

p {
  margin: 0 0 1rem;
}

.lead {
  color: var(--muted);
  font-size: 1.125rem;
}

.steps {
  margin: 0;
  padding-left: 1.25rem;
}

.steps li {
  margin-bottom: 0.75rem;
  padding-left: 0.25rem;
}

.card {
  padding: 1.25rem 1.25rem 0.25rem;
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  background: var(--card);
}

/* A platform's own logo, as its brand site gives it: the file already carries the clear space around it. */
.platform-logo {
  margin: -0.25rem 0 0.5rem -1.25rem;
}

.platform-logo a {
  display: inline-block;
  line-height: 0;
}

.platform-logo img {
  display: block;
  width: auto;
  height: 3.5rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.875rem;
}

.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding-block: 1.25rem;
}

.site-footer p {
  margin: 0;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
}

/* The privacy policy and the terms: long text, read slowly. */
.legal h2 {
  margin-top: 2.5rem;
  scroll-margin-top: 1rem;
}

.legal h3 {
  margin: 1.75rem 0 0.5rem;
  font-size: 1.0625rem;
  line-height: 1.35;
  scroll-margin-top: 1rem;
}

.legal ul,
.legal ol {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
}

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

.legal a {
  overflow-wrap: anywhere;
}

.meta {
  color: var(--muted);
  font-size: 0.9375rem;
}