* { box-sizing: border-box; }

body {
  margin: 0;
  background: #ffffff;
  color: #10151c;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
}

p { margin: 0 0 16px; }
h1, h2, h3 { margin: 0; }

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 14px 24px;
  background: #2447f9;
  color: #ffffff;
  font-size: 16px;
  font-weight: 700;
  text-decoration: none;
  border-radius: 8px;
  transition: background 0.15s;
}
.btn:hover { background: #1633c9; }
.btn-small { padding: 9px 16px; font-size: 15px; }
.btn-light { background: #ffffff; color: #2447f9; }
.btn-light:hover { background: #e9edff; }

a:focus, .btn:focus, summary:focus {
  outline: 3px solid #ffb800;
  outline-offset: 3px;
}

/* Nav */
.nav { padding: 18px 0; }
.nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.wordmark { margin: 0; font-size: 19px; font-weight: 800; letter-spacing: -0.02em; }

/* Hero */
.hero { padding: 36px 0 56px; }

h1 {
  font-size: 40px;
  line-height: 1.08;
  font-weight: 800;
  letter-spacing: -0.035em;
  margin-bottom: 20px;
}
.lead { font-size: 19px; color: #3d4654; max-width: 520px; }
.hero-cta { margin: 28px 0 14px; }
.hero-price { font-size: 15px; color: #5b6470; margin: 0; }
.hero-visual { margin-top: 40px; }

/* Message thread */
.thread {
  background: #f2f4f7;
  border: 1px solid #dde1e7;
  border-radius: 16px;
  padding: 20px;
}
.thread-title { font-size: 14px; font-weight: 700; color: #3d4654; margin-bottom: 14px; }
.bubble { padding: 14px 16px; border-radius: 10px; font-size: 15.5px; line-height: 1.5; margin-bottom: 12px; }
.bubble p { margin: 0; }
.bubble-label { font-size: 13px; font-weight: 700; margin-bottom: 6px !important; }
.bubble.generic { background: #e4e7ec; color: #5b6470; }
.bubble.mine { background: #ffffff; border: 2px solid #2447f9; }
.bubble.mine .bubble-label { color: #2447f9; }
.thread-note { font-size: 13px; color: #6b7480; margin: 4px 0 0; }

/* Statement band */
.statement { background: #10151c; color: #ffffff; padding: 56px 0; }
.statement p {
  margin: 0;
  max-width: 780px;
  font-size: 26px;
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* How it works */
.how { padding: 64px 0 40px; }
.how h2, .faq h2 { font-size: 32px; letter-spacing: -0.03em; font-weight: 800; margin-bottom: 24px; }
.step {
  display: flex;
  padding: 24px 0;
  border-top: 1px solid #dde1e7;
}
.step:last-child { border-bottom: 1px solid #dde1e7; }
.step-num {
  margin: 0;
  width: 56px;
  font-size: 40px;
  line-height: 1;
  font-weight: 800;
  color: #2447f9;
}
.step-body { flex: 1; }
.step-body h3 { font-size: 21px; letter-spacing: -0.02em; margin-bottom: 6px; }
.step-body p { margin: 0; color: #3d4654; max-width: 520px; }

/* Price */
.price { background: #2447f9; color: #ffffff; padding: 56px 0; margin-top: 24px; }
.price-amount { margin: 0; font-size: 80px; line-height: 1; font-weight: 800; letter-spacing: -0.05em; }
.price-unit { font-size: 18px; margin: 10px 0 28px; }
.price ul { margin: 0 0 20px; padding: 0; list-style: none; }
.price li { padding: 10px 0; border-top: 1px solid rgba(255,255,255,0.35); font-weight: 600; }
.price li:last-child { border-bottom: 1px solid rgba(255,255,255,0.35); }
.price-note { font-size: 15px; opacity: 0.9; }

/* FAQ */
.faq { padding: 64px 0 24px; }
.faq-wrap { max-width: 760px; }
details { border-top: 1px solid #dde1e7; padding: 16px 0; }
details:last-of-type { border-bottom: 1px solid #dde1e7; }
summary { cursor: pointer; font-weight: 700; font-size: 18px; }
details p { margin: 10px 0 0; color: #3d4654; }

/* Final CTA */
.final { padding: 56px 0 72px; }
.final h2 { font-size: 34px; line-height: 1.12; letter-spacing: -0.035em; font-weight: 800; max-width: 640px; margin-bottom: 14px; }
.final p { color: #3d4654; }

.footer { border-top: 1px solid #dde1e7; padding: 22px 0 36px; font-size: 14px; color: #6b7480; }
.footer p { margin: 0; }

/* Tablet and desktop */
@media (min-width: 820px) {
  body { font-size: 18px; }
  .hero { padding: 64px 0 80px; }
  .hero-row { display: flex; align-items: center; }
  .hero-text { flex: 1; padding-right: 48px; }
  .hero-visual { flex: 1; margin-top: 0; }
  h1 { font-size: 58px; }
  .statement { padding: 80px 0; }
  .statement p { font-size: 38px; }
  .how { padding: 96px 0 56px; }
  .step-num { width: 90px; font-size: 56px; }
  .price { padding: 80px 0; }
  .price-row { display: flex; align-items: center; }
  .price-main { flex: 1; padding-right: 48px; }
  .price-detail { flex: 1; }
  .price-amount { font-size: 140px; }
  .faq { padding: 96px 0 40px; }
  .final { padding: 80px 0 110px; }
  .final h2 { font-size: 48px; }
}