/* One stylesheet for every page. The site is four static files on a CDN —
   a build step would cost more than it saves. */

:root {
  color-scheme: light dark;

  --bg: #ffffff;
  --bg-soft: #f5f6f8;
  --fg: #14161a;
  --fg-soft: #5a6069;
  --line: #e3e6ea;
  --accent: #2f6df6;
  --accent-fg: #ffffff;
  --radius: 14px;
  --measure: 68ch;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d0f13;
    --bg-soft: #161a20;
    --fg: #eef1f5;
    --fg-soft: #9aa3ae;
    --line: #252b33;
    --accent: #6a9bff;
    --accent-fg: #0d0f13;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); }
a:hover { text-decoration: none; }

.wrap {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- header / footer ---------------------------------------------------- */

header.site {
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  z-index: 10;
}

header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 64px;
}

.brand {
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: 18px;
  color: var(--fg);
  text-decoration: none;
}
.brand span { color: var(--accent); }

header.site nav {
  display: flex;
  gap: 20px;
  font-size: 14px;
}
header.site nav a {
  color: var(--fg-soft);
  text-decoration: none;
}
header.site nav a:hover { color: var(--fg); }

footer.site {
  border-top: 1px solid var(--line);
  margin-top: 80px;
  padding: 32px 0;
  color: var(--fg-soft);
  font-size: 14px;
}
footer.site .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  justify-content: space-between;
}
footer.site nav { display: flex; flex-wrap: wrap; gap: 20px; }
footer.site a { color: var(--fg-soft); text-decoration: none; }
footer.site a:hover { color: var(--fg); }

/* ---- landing ------------------------------------------------------------ */

.hero {
  padding: 88px 0 64px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(34px, 6vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin: 0 0 20px;
}

.hero p.lede {
  font-size: clamp(17px, 2.2vw, 20px);
  color: var(--fg-soft);
  max-width: 60ch;
  margin: 0 auto 28px;
}

.badge {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 28%, transparent);
  border-radius: 999px;
  padding: 5px 14px;
  margin-bottom: 22px;
}

.note {
  font-size: 14px;
  color: var(--fg-soft);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.card {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 22px 24px;
}
.card h3 {
  margin: 0 0 8px;
  font-size: 16px;
  letter-spacing: -0.01em;
}
.card p {
  margin: 0;
  color: var(--fg-soft);
  font-size: 15px;
}

section.band { padding: 56px 0; }
section.band > .wrap > h2 {
  font-size: clamp(24px, 3.4vw, 32px);
  letter-spacing: -0.02em;
  margin: 0 0 10px;
}
section.band > .wrap > p.sub {
  color: var(--fg-soft);
  margin: 0 0 28px;
  max-width: 62ch;
}

/* The "what we are not" panel. Deliberately loud: it is the single thing
   most visitors — and every app-store reviewer — needs to read. */
.disclaimer {
  border: 1px solid var(--line);
  background: var(--bg-soft);
  border-radius: var(--radius);
  padding: 28px 26px;
}
.disclaimer h2 { margin: 0 0 12px; font-size: 20px; }
.disclaimer ul { margin: 0; padding-left: 20px; color: var(--fg-soft); }
.disclaimer li { margin-bottom: 8px; }
.disclaimer li:last-child { margin-bottom: 0; }

/* ---- long-form documents (privacy, terms) ------------------------------- */

article.doc {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 56px 0 0;
}
article.doc h1 {
  font-size: clamp(28px, 4.5vw, 40px);
  letter-spacing: -0.025em;
  margin: 0 0 6px;
}
article.doc .updated {
  color: var(--fg-soft);
  font-size: 14px;
  margin: 0 0 36px;
}
article.doc h2 {
  font-size: 21px;
  letter-spacing: -0.015em;
  margin: 40px 0 10px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}
article.doc h3 {
  font-size: 16px;
  margin: 24px 0 6px;
}
article.doc p, article.doc li { color: var(--fg); }
article.doc ul, article.doc ol { padding-left: 22px; }
article.doc li { margin-bottom: 7px; }

article.doc table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  margin: 16px 0;
}
article.doc th, article.doc td {
  text-align: left;
  vertical-align: top;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
}
article.doc th {
  font-weight: 600;
  color: var(--fg-soft);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.table-scroll { overflow-x: auto; }

.callout {
  border-left: 3px solid var(--accent);
  background: var(--bg-soft);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 16px 18px;
  margin: 20px 0;
}
.callout p { margin: 0; }
.callout p + p { margin-top: 10px; }