:root {
  --bg: #f8fafc;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --blue: #2563eb;
  --blue-soft: #eff6ff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #020617;
    --card: #0f172a;
    --text: #e2e8f0;
    --muted: #94a3b8;
    --line: #1e293b;
    --blue: #3b82f6;
    --blue-soft: #172554;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 Inter, ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  -webkit-text-size-adjust: 100%;
}
a { color: var(--blue); }
.top {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 720px; margin: 0 auto; padding: 14px 16px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; }
.brand img { border-radius: 9px; }
.lang { display: inline-flex; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.lang button { border: 0; background: transparent; color: var(--muted); padding: 6px 10px; font: inherit; font-size: 13px; font-weight: 600; cursor: pointer; }
.lang button[aria-pressed='true'] { background: var(--blue); color: #fff; }
main { max-width: 720px; margin: 0 auto; padding: 0 16px 48px; }
.hero { text-align: center; padding: 24px 0 28px; }
.hero h1 { font-size: 28px; margin: 0 0 8px; }
.hero p { margin: 0 0 18px; color: var(--muted); }
.btn {
  display: inline-block; text-decoration: none; border-radius: 14px;
  padding: 12px 20px; font-weight: 700; border: 1px solid var(--line); color: var(--text);
}
.btn.primary { background: var(--blue); border-color: var(--blue); color: #fff; }
.btn.big { font-size: 20px; padding: 16px 32px; width: 100%; max-width: 360px; box-shadow: 0 8px 24px rgb(37 99 235 / 0.35); }
.hero .btn.big + p { margin-top: 16px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 18px; margin: 14px 0; }
.card h2 { font-size: 18px; margin: 0 0 6px; }
.tabs { display: flex; gap: 6px; margin: 12px 0; flex-wrap: wrap; }
.tabs button {
  flex: 1; min-width: 92px; border: 1px solid var(--line); background: transparent; color: var(--text);
  border-radius: 10px; padding: 9px 10px; font: inherit; font-weight: 600; cursor: pointer;
}
.tabs button[aria-selected='true'] { background: var(--blue-soft); border-color: var(--blue); color: var(--blue); }
.steps { list-style: none; counter-reset: s; padding: 0; margin: 10px 0 0; }
.steps li { counter-increment: s; position: relative; padding: 4px 0 12px 46px; }
.steps li::before {
  content: counter(s); position: absolute; left: 0; top: 2px; width: 32px; height: 32px; border-radius: 50%;
  background: var(--blue); color: #fff; font-weight: 700; display: grid; place-items: center;
}
.steps b { display: block; }
.steps span { color: var(--muted); }
.ico { display: inline-block; border: 1px solid currentColor; border-radius: 4px; padding: 0 4px; font-size: 12px; }
details { border-top: 1px solid var(--line); padding: 10px 0; }
details:first-of-type { border-top: 0; }
summary { cursor: pointer; font-weight: 600; }
details p { margin: 8px 0 0; color: var(--muted); }
.contact a { word-break: break-all; }