/* ScreenTwin — static site styles.
   No JavaScript anywhere: every page is HTML and this stylesheet. */

:root {
  --bg: #f5f5f7;
  --surface: #ffffff;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --line: rgba(0, 0, 0, 0.09);
  --accent: #6d5efc;
  --accent-soft: rgba(109, 94, 252, 0.1);
  --radius: 18px;
  --maxw: 720px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --surface: #1c1c1e;
    --text: #f5f5f7;
    --muted: #98989d;
    --line: rgba(255, 255, 255, 0.12);
    --accent: #a99cff;
    --accent-soft: rgba(169, 156, 255, 0.14);
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text",
    "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 22px;
}

/* ---------------------------------------------------------------- nav */

nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--line);
}

nav .wrap {
  display: flex;
  align-items: center;
  gap: 20px;
  height: 52px;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
}

nav a:hover { color: var(--text); }

nav .brand {
  color: var(--text);
  font-weight: 600;
  margin-right: auto;
  font-size: 15px;
  letter-spacing: -0.01em;
}

/* -------------------------------------------------------------- hero */

header.hero {
  text-align: center;
  padding: 76px 0 56px;
}

header.hero h1 {
  font-size: clamp(34px, 7vw, 52px);
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin: 0 0 16px;
  font-weight: 700;
}

header.hero p {
  font-size: clamp(17px, 2.4vw, 20px);
  color: var(--muted);
  margin: 0 auto;
  max-width: 30em;
}

.badge {
  display: inline-block;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  padding: 5px 13px;
  border-radius: 100px;
  margin-bottom: 20px;
}

/* ------------------------------------------------------------- cards */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 14px;
  padding: 8px 0 56px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}

.card h3 {
  margin: 0 0 7px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.55;
}

/* -------------------------------------------------------- legal pages */

main.doc { padding: 44px 0 80px; }

main.doc h1 {
  font-size: clamp(28px, 5vw, 38px);
  letter-spacing: -0.02em;
  margin: 0 0 6px;
}

.updated {
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 34px;
}

main.doc h2 {
  font-size: 20px;
  letter-spacing: -0.01em;
  margin: 38px 0 10px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

main.doc h2:first-of-type { border-top: 0; padding-top: 0; }

main.doc p, main.doc li { color: var(--text); }

main.doc ul { padding-left: 20px; }
main.doc li { margin-bottom: 8px; }

.callout {
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: 12px;
  padding: 16px 18px;
  margin: 22px 0;
}

.callout p { margin: 0; font-size: 15.5px; }

strong { font-weight: 600; }

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

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

footer {
  border-top: 1px solid var(--line);
  padding: 30px 0 46px;
  color: var(--muted);
  font-size: 14px;
}

footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  align-items: center;
}

footer a { color: var(--muted); text-decoration: none; }
footer a:hover { color: var(--text); }
footer .spacer { margin-left: auto; }