:root {
  --bg: #fbfbfa;
  --surface: #fff;
  --ink: #141821;
  --muted: #5b6474;
  --line: #e3e6eb;
  --accent: #1f4fd8;
  --accent-ink: #fff;
  --ok: #12805c;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(20, 24, 33, 0.06), 0 8px 24px rgba(20, 24, 33, 0.06);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1218;
    --surface: #161b24;
    --ink: #e8ebf1;
    --muted: #9aa4b5;
    --line: #262d3a;
    --accent: #7aa2ff;
    --accent-ink: #0f1218;
    --ok: #4cc39a;
    --shadow: none;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; }
a { color: var(--accent); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 1rem; top: 1rem; background: var(--surface); padding: 0.5rem 0.75rem; border-radius: 6px; }
.wrap { max-width: 68rem; margin: 0 auto; padding: 0 1.25rem; }

header.top { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1.25rem 0; flex-wrap: wrap; }
.brand { font-weight: 700; letter-spacing: -0.01em; color: var(--ink); text-decoration: none; }
.brand span { color: var(--accent); }
nav a { color: var(--muted); text-decoration: none; margin-left: 1.25rem; font-size: 0.95rem; }
nav a:hover { color: var(--ink); }

.hero { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 3rem; align-items: center; padding: 3rem 0 4rem; }
h1 { font-size: clamp(2rem, 4.5vw, 3.1rem); line-height: 1.1; letter-spacing: -0.025em; margin: 0 0 1rem; }
.lead { font-size: 1.15rem; color: var(--muted); margin: 0 0 1.75rem; max-width: 36rem; }
.btn { display: inline-block; background: var(--accent); color: var(--accent-ink); padding: 0.85rem 1.3rem; border-radius: 999px; font-weight: 600; text-decoration: none; }
.btn.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); margin-left: 0.5rem; }
.note { font-size: 0.9rem; color: var(--muted); margin-top: 1rem; }

.demo { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 1.5rem; }
.demo h3 { margin: 0 0 1rem; font-size: 1.05rem; }
.field { border: 1px solid var(--line); border-radius: 8px; padding: 0.6rem 0.75rem; margin: 0 0 0.6rem; color: var(--muted); font-size: 0.9rem; }
.confirm { display: block; text-align: center; background: var(--ink); color: var(--bg); border-radius: 8px; padding: 0.7rem; font-weight: 600; margin-top: 1rem; }
.receipt { margin-top: 1rem; border-top: 1px dashed var(--line); padding-top: 1rem; font-size: 0.9rem; }
.receipt b { color: var(--ok); }

section { padding: 3.5rem 0; border-top: 1px solid var(--line); }
h2 { font-size: 1.75rem; letter-spacing: -0.02em; margin: 0 0 0.5rem; }
.sub { color: var(--muted); margin: 0 0 2rem; max-width: 40rem; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; counter-reset: step; padding: 0; margin: 0; }
.steps li { list-style: none; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.25rem; }
.steps li::before { counter-increment: step; content: counter(step); display: grid; place-items: center; width: 1.9rem; height: 1.9rem; border-radius: 50%; background: var(--accent); color: var(--accent-ink); font-weight: 700; margin-bottom: 0.6rem; }
.steps h3, .card h3 { margin: 0 0 0.35rem; font-size: 1.05rem; }
.steps p, .card p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.25rem; }
.tag { font-size: 0.75rem; font-weight: 600; color: var(--accent); border: 1px solid currentColor; border-radius: 999px; padding: 0 0.45rem; margin-left: 0.35rem; vertical-align: 2px; }

.plans { display: grid; grid-template-columns: repeat(2, minmax(0, 22rem)); gap: 1.25rem; }
.plan { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.5rem; }
.plan.pro { border-color: var(--accent); }
.plan h3 { margin: 0; }
.price { font-size: 2rem; font-weight: 700; margin: 0.25rem 0 1rem; }
.price small { font-size: 0.95rem; color: var(--muted); font-weight: 400; }
.plan ul { padding-left: 1.1rem; margin: 0; }
.plan li { margin: 0.35rem 0; }

details { border-bottom: 1px solid var(--line); padding: 1rem 0; }
summary { cursor: pointer; font-weight: 600; }
details p { color: var(--muted); margin: 0.6rem 0 0; }

footer { border-top: 1px solid var(--line); padding: 2rem 0 3rem; color: var(--muted); font-size: 0.9rem; }
footer a { color: var(--muted); }
footer p { margin: 0.25rem 0; }

.legal { max-width: 46rem; padding: 1.5rem 0 4rem; }
.legal h1 { font-size: 2.2rem; }
.legal h2 { font-size: 1.25rem; margin-top: 2.25rem; }
.legal .meta { color: var(--muted); }
.legal table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
.legal th, .legal td { text-align: left; border-bottom: 1px solid var(--line); padding: 0.55rem 0.75rem 0.55rem 0; vertical-align: top; }

@media (max-width: 800px) {
  .hero { grid-template-columns: 1fr; gap: 2rem; padding-top: 1.5rem; }
  .steps, .grid, .plans { grid-template-columns: 1fr; }
  nav a { margin-left: 0; margin-right: 1rem; }
  .btn.ghost { margin: 0.75rem 0 0; }
}