:root {
  color-scheme: light;
  --green: #21c063;
  --green-dark: #0f9d48;
  --green-soft: #e7f9ef;
  --ink: #0d1b13;
  --muted: #5c6b63;
  --line: #dfe6e1;
  --bg: #fff;
  --max: 1080px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.6 -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

header .wrap { display: flex; align-items: center; gap: 16px; height: 66px; }
header img { width: 28px; height: 28px; }
header b { font-size: 16px; flex: 1; }
header a { color: var(--ink); text-decoration: none; font-size: 15px; }
header a:hover { color: var(--green-dark); }

.btn {
  display: inline-block;
  background: var(--green);
  color: #fff;
  border: 0;
  border-radius: 999px;
  padding: 13px 28px;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

.btn:hover { background: var(--green-dark); }
.btn.ghost { background: #fff; color: var(--ink); border: 1px solid var(--line); }
.btn.ghost:hover { border-color: var(--green); color: var(--green-dark); }
.btn[disabled] { background: #b9c3c8; cursor: default; }

.hero { padding: 84px 0 64px; background: linear-gradient(160deg, var(--green-soft), #fff 62%); }
.hero h1 { font-size: 50px; line-height: 1.08; letter-spacing: -.025em; margin: 0 0 20px; max-width: 15ch; }
.hero p.lead { font-size: 20px; color: var(--muted); max-width: 56ch; margin: 0 0 32px; }
.hero .row { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.hero small { display: block; margin-top: 18px; color: var(--muted); }

section { padding: 72px 0; }
section h2 { font-size: 34px; letter-spacing: -.02em; margin: 0 0 14px; }
section p.sub { color: var(--muted); font-size: 18px; margin: 0 0 40px; max-width: 62ch; }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.card { border: 1px solid var(--line); border-radius: 14px; padding: 24px; }
.card .ic {
  width: 44px; height: 44px; border-radius: 11px; background: var(--green-soft);
  display: flex; align-items: center; justify-content: center; font-size: 21px; margin-bottom: 14px;
}
.card h3 { margin: 0 0 6px; font-size: 19px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }

.plans { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; max-width: 760px; }
.plan { border: 1px solid var(--line); border-radius: 16px; padding: 30px; }
.plan.pro { border: 2px solid var(--green); box-shadow: 0 16px 40px rgba(15, 157, 72, .13); }
.plan h3 { margin: 0 0 4px; font-size: 20px; }
.plan .price { font-size: 40px; font-weight: 800; letter-spacing: -.03em; margin: 10px 0 4px; }
.plan .price span { font-size: 16px; font-weight: 500; color: var(--muted); }
.plan ul { list-style: none; padding: 0; margin: 22px 0 26px; }
.plan li { padding-left: 26px; position: relative; margin-bottom: 9px; font-size: 15px; }
.plan li::before { content: "✓"; position: absolute; left: 0; color: var(--green-dark); font-weight: 800; }
.plan li.no { color: var(--muted); }
.plan li.no::before { content: "—"; color: var(--line); }

.privacy-note {
  border: 1px solid var(--line); border-left: 4px solid var(--green);
  border-radius: 10px; padding: 20px 24px; background: #fbfdfc;
}

.faq { max-width: 760px; }
.faq details { border-bottom: 1px solid var(--line); padding: 18px 0; }
.faq summary { font-weight: 600; cursor: pointer; font-size: 17px; }
.faq p { color: var(--muted); margin: 10px 0 0; }

.keybox {
  font: 600 22px/1.4 ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: .06em; background: var(--green-soft); border: 1px dashed var(--green);
  border-radius: 12px; padding: 22px; text-align: center; word-break: break-all; margin: 22px 0;
}

.doc { max-width: 760px; padding: 56px 0 80px; }
.doc h1 { font-size: 38px; letter-spacing: -.02em; margin: 0 0 8px; }
.doc h2 { font-size: 22px; margin: 38px 0 10px; }
.doc table { border-collapse: collapse; width: 100%; margin: 16px 0; }
.doc th, .doc td { border: 1px solid var(--line); padding: 9px 12px; text-align: left; font-size: 15px; }
.doc th { background: var(--green-soft); }
.doc .meta { color: var(--muted); font-size: 15px; }

footer { border-top: 1px solid var(--line); padding: 34px 0; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; gap: 20px; flex-wrap: wrap; align-items: center; }
footer a { color: var(--muted); }
footer .spacer { flex: 1; }

.err { color: #b3261e; }

@media (max-width: 820px) {
  .hero h1 { font-size: 36px; }
  .grid, .plans { grid-template-columns: 1fr; }
  header nav a:not(.btn) { display: none; }
}