:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #1b1f24;
  --muted: #5b6470;
  --border: #dde1e6;
  --accent: #1f6feb;
  --accent-text: #ffffff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1216;
    --surface: #181c22;
    --text: #e6e9ed;
    --muted: #9aa3ad;
    --border: #2a3038;
    --accent: #4c8dff;
    --accent-text: #0b0e12;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

main {
  max-width: 640px;
  margin: 0 auto;
  padding: 48px 16px 32px;
}

h1 { font-size: 2rem; margin: 0 0 8px; }
h2 { font-size: 1.15rem; margin: 32px 0 8px; }
.lede { color: var(--muted); margin: 0; }
.small { font-size: 0.9rem; color: var(--muted); }
a { color: var(--accent); }

.card {
  margin-top: 28px;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  text-align: center;
}

.btn {
  display: inline-block;
  padding: 14px 24px;
  background: var(--accent);
  color: var(--accent-text);
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
}
.btn:hover { filter: brightness(1.08); }
.btn:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }

.steps, .facts { padding-left: 1.25rem; }
.steps li, .facts li { margin: 6px 0; }

footer { margin-top: 40px; border-top: 1px solid var(--border); padding-top: 12px; }