:root {
  --ink: #1a1f2e;
  --muted: #5b6578;
  --bg: #fafbfc;
  --card: #ffffff;
  --line: #e5e8ee;
  --accent: #1f5fd4;
  --accent-ink: #ffffff;
  --radius: 10px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: 1040px; margin: 0 auto; padding: 0 24px; }

header.wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 22px;
  padding-bottom: 22px;
}

.brand { display: flex; align-items: center; gap: 10px; font-size: 18px; }
.brand .dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--accent);
  display: inline-block;
}
nav a { margin-left: 20px; color: var(--ink); }
nav a:hover { color: var(--accent); }

.hero { padding: 60px 24px 40px; text-align: left; }
.hero h1 {
  font-size: clamp(36px, 6vw, 56px);
  line-height: 1.08;
  margin: 0 0 16px;
  letter-spacing: -0.02em;
}
.hero .lead {
  font-size: 19px;
  color: var(--muted);
  max-width: 640px;
  margin: 0 0 28px;
}

.cta { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 15px;
  transition: transform 0.05s ease, background 0.15s ease;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { background: #1951b8; }
.btn-ghost { border: 1px solid var(--line); color: var(--ink); background: var(--card); }
.btn-ghost:hover { border-color: var(--ink); }

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  padding: 40px 24px;
}
.features .f {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}
.features h3 { margin: 0 0 6px; font-size: 16px; }
.features p { margin: 0; color: var(--muted); font-size: 14.5px; }

.pricing { padding: 60px 24px 40px; }
.pricing h2 {
  font-size: 32px;
  margin: 0 0 6px;
  letter-spacing: -0.01em;
}
.pricing .muted { color: var(--muted); margin: 0 0 28px; }
.pricing .small { font-size: 14px; margin-top: 24px; }

.plans {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}
.plan {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  position: relative;
  display: flex;
  flex-direction: column;
}
.plan-featured { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(31,95,212,0.08); }
.badge {
  position: absolute;
  top: -11px;
  right: 20px;
  background: var(--accent);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 20px;
  letter-spacing: 0.02em;
}
.plan h3 { margin: 0 0 8px; font-size: 18px; }
.plan .price { margin: 0 0 18px; }
.plan .amount { font-size: 40px; font-weight: 700; letter-spacing: -0.02em; }
.plan .per { color: var(--muted); margin-left: 4px; font-size: 14px; }
.plan ul {
  list-style: none;
  padding: 0;
  margin: 0 0 22px;
  flex: 1;
}
.plan ul li {
  padding: 7px 0 7px 22px;
  font-size: 14.5px;
  position: relative;
  border-bottom: 1px solid #f1f3f7;
}
.plan ul li:last-child { border-bottom: none; }
.plan ul li::before {
  content: "";
  position: absolute;
  left: 0; top: 13px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.faq { padding: 40px 24px 60px; }
.faq h2 { font-size: 28px; margin: 0 0 18px; }
.faq details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 18px;
  background: var(--card);
  margin-bottom: 10px;
}
.faq summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 15.5px;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  float: right;
  color: var(--muted);
  font-weight: 400;
  font-size: 20px;
  line-height: 1;
}
.faq details[open] summary::after { content: "−"; }
.faq details p { margin: 10px 0 0; color: var(--muted); font-size: 15px; }

footer.wrap {
  border-top: 1px solid var(--line);
  margin-top: 40px;
  padding: 24px;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}
footer p { margin: 0; }

@media (max-width: 600px) {
  header.wrap { flex-direction: column; gap: 10px; }
  nav a { margin: 0 10px; }
  .hero { padding-top: 30px; text-align: center; }
  .hero .lead { margin-left: auto; margin-right: auto; }
  .cta { justify-content: center; }
}