:root {
  --bg: #f6f7fb;
  --surface: #ffffff;
  --ink: #20283a;
  --muted: #5b6579;
  --line: #dfe3ee;
  --brand: #0800ff;
  --brand-ink: #ffffff;
  --danger: #b3261e;
  --ok: #17794a;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1220;
    --surface: #171b2e;
    --ink: #eef0f8;
    --muted: #a3abc2;
    --line: #2a3050;
    --brand: #6b63ff;
    --danger: #ff8a80;
    --ok: #5fd39a;
  }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--brand); }
.top { display: flex; align-items: center; justify-content: space-between; gap: 16px; max-width: 1040px; margin: 0 auto; padding: 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 700; }
.brand img { border-radius: 10px; }
.top-link { font-weight: 600; text-decoration: none; }
main { max-width: 1040px; margin: 0 auto; padding: 0 16px 48px; }
.hero { padding: 56px 0 40px; max-width: 760px; }
.eyebrow { margin: 0 0 12px; font-size: 13px; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); font-weight: 600; }
h1 { margin: 0 0 16px; font-size: clamp(28px, 5vw, 44px); line-height: 1.1; letter-spacing: -.02em; }
h2 { margin: 0 0 12px; font-size: 26px; letter-spacing: -.01em; }
h3 { margin: 0 0 6px; font-size: 17px; }
.lead { margin: 0 0 24px; font-size: 18px; color: var(--muted); }
.muted { color: var(--muted); margin: 0 0 24px; }
.button { display: inline-block; border: 0; border-radius: 10px; padding: 13px 22px; background: var(--brand); color: var(--brand-ink); font: inherit; font-weight: 700; text-decoration: none; cursor: pointer; }
.button:hover { filter: brightness(1.08); }
.button[disabled] { opacity: .6; cursor: wait; }
.offer { padding: 24px 0 40px; }
.cards { list-style: none; margin: 0; padding: 0; display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.cards li { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 20px; }
.cards p { margin: 0; color: var(--muted); font-size: 15px; }
.form-section { background: var(--surface); border: 1px solid var(--line); border-radius: 18px; padding: 28px 24px; scroll-margin-top: 16px; }
form { display: grid; gap: 20px; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.wide { grid-column: 1 / -1; }
label { display: grid; gap: 6px; font-weight: 600; font-size: 15px; }
input:not([type="checkbox"]), textarea { width: 100%; border: 1px solid var(--line); border-radius: 10px; padding: 11px 12px; background: var(--bg); color: var(--ink); font: inherit; font-weight: 400; }
input:focus-visible, textarea:focus-visible, .button:focus-visible { outline: 3px solid var(--brand); outline-offset: 2px; }
fieldset { border: 1px solid var(--line); border-radius: 12px; padding: 16px; margin: 0; display: grid; gap: 12px; }
legend { padding: 0 6px; font-weight: 700; }
.check { grid-template-columns: 22px 1fr; align-items: start; gap: 12px; font-weight: 400; cursor: pointer; }
.check input { width: 20px; height: 20px; margin-top: 3px; accent-color: var(--brand); }
.check b { display: block; font-weight: 600; }
.check small { color: var(--muted); font-size: 14px; }
.err { color: var(--danger); font-weight: 500; font-size: 14px; min-height: 0; }
.err:empty { display: none; }
.trap { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.success { margin-top: 24px; border: 1px solid var(--ok); border-radius: 12px; padding: 18px; }
.success h3 { color: var(--ok); }
.foot { max-width: 1040px; margin: 0 auto; padding: 0 16px 32px; color: var(--muted); font-size: 14px; }
@media (max-width: 480px) { .form-section { padding: 20px 16px; } }