:root {
  --ink: #0d1117;
  --paper: #f8f8f6;
  --accent: #1f6feb;
  --accent-dark: #0f4fb8;
  --muted: #565d66;
  --line: #d8dbe0;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Inter, system-ui, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
  font-size: 16px;
}

.wrap { max-width: 960px; margin: 0 auto; padding: 0 20px; }

header {
  padding: 80px 0 64px;
  text-align: center;
  background: radial-gradient(ellipse at top, #eef3ff 0%, var(--paper) 70%);
  border-bottom: 1px solid var(--line);
}
header .badge {
  width: 112px; height: 112px;
  border-radius: 50%;
  box-shadow: 0 8px 24px rgba(0,0,0,.12);
}
header h1 {
  font-size: 56px;
  margin: 20px 0 8px;
  letter-spacing: -.02em;
  font-weight: 800;
}
header .tagline {
  font-size: 20px;
  color: var(--muted);
  max-width: 640px;
  margin: 0 auto 32px;
}
.cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.microcopy {
  font-size: 13px; color: var(--muted); margin-top: 18px;
}

.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  transition: transform .08s ease, box-shadow .15s ease;
  border: 1px solid transparent;
}
.btn.primary {
  background: var(--accent); color: #fff;
  box-shadow: 0 2px 8px rgba(31,111,235,.25);
}
.btn.primary:hover { background: var(--accent-dark); transform: translateY(-1px); }
.btn.secondary {
  background: transparent; color: var(--ink);
  border-color: var(--line);
}
.btn.secondary:hover { border-color: var(--ink); }
.btn.large { padding: 14px 32px; font-size: 16px; }

.features { padding: 72px 0; }
.features .grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px;
}
.feature h3 { margin: 0 0 8px; font-size: 18px; }
.feature p { margin: 0; color: var(--muted); font-size: 15px; }

.pricing {
  padding: 72px 0 88px;
  background: #fff;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.pricing h2 { text-align: center; font-size: 32px; margin: 0 0 40px; }
.pricing .card {
  background: var(--paper);
  max-width: 420px; margin: 0 auto;
  padding: 40px 36px;
  border-radius: 12px;
  border: 1px solid var(--line);
  text-align: center;
}
.pricing .card h3 { font-size: 44px; margin: 0 0 20px; font-weight: 800; letter-spacing: -.02em; }
.pricing ul { text-align: left; padding-left: 20px; margin: 0 0 28px; font-size: 15px; }
.pricing ul li { margin-bottom: 8px; }

.faq { padding: 72px 0 96px; }
.faq h2 { text-align: center; font-size: 28px; margin: 0 0 32px; }
.faq details {
  border-bottom: 1px solid var(--line);
  padding: 16px 0;
}
.faq summary {
  font-weight: 600; cursor: pointer; font-size: 16px;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "+ "; color: var(--accent); font-weight: 700; }
.faq details[open] summary::before { content: "− "; }
.faq p { color: var(--muted); margin: 10px 0 0; }

footer {
  padding: 40px 0;
  border-top: 1px solid var(--line);
  text-align: center;
  font-size: 13px;
  color: var(--muted);
}
footer a { color: var(--accent); text-decoration: none; }
footer a:hover { text-decoration: underline; }

@media (max-width: 600px) {
  header h1 { font-size: 40px; }
  header .tagline { font-size: 17px; }
  .features { padding: 48px 0; }
  .pricing, .faq { padding: 48px 0; }
}