:root {
  --ocean: #0369a1;
  --ocean-dark: #075985;
  --ocean-light: #0ea5e9;
  --ink: #0f172a;
  --ink-soft: #475569;
  --ink-mute: #94a3b8;
  --paper: #f8fafc;
  --paper-warm: #ffffff;
  --line: #e2e8f0;
  --accent: #0369a1;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-size: 16px;
  line-height: 1.55;
  min-height: 100vh;
}

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

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

.site-header {
  background: var(--paper-warm);
  border-bottom: 1px solid var(--line);
  padding: 18px 0;
  position: sticky;
  top: 0;
  z-index: 50;
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand {
  font-weight: 700;
  font-size: 20px;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.brand:hover { text-decoration: none; }
nav a { color: var(--ink-soft); margin-left: 24px; font-size: 15px; }
nav a:hover { color: var(--ocean); text-decoration: none; }
nav .btn { margin-left: 24px; }

.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.1s ease, box-shadow 0.15s ease;
}
.btn-primary {
  background: var(--ocean);
  color: white;
}
.btn-primary:hover {
  background: var(--ocean-dark);
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(3, 105, 161, 0.25);
}
.btn-ghost {
  background: transparent;
  color: var(--ocean);
  border-color: var(--ocean);
}
.btn-ghost:hover {
  background: var(--ocean);
  color: white;
  text-decoration: none;
}

.hero {
  padding: 88px 0 72px;
  text-align: center;
}
.hero h1 {
  font-size: 44px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  max-width: 720px;
  margin: 0 auto 20px;
}
.hero .sub {
  font-size: 19px;
  color: var(--ink-soft);
  max-width: 620px;
  margin: 0 auto 32px;
}
.hero .cta-row { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

.section {
  padding: 64px 0;
  border-top: 1px solid var(--line);
}
.section h2 {
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
  text-align: center;
}
.section .lede {
  font-size: 17px;
  color: var(--ink-soft);
  text-align: center;
  max-width: 620px;
  margin: 0 auto 40px;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}
.feature {
  background: var(--paper-warm);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 24px;
}
.feature h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--ink);
}
.feature p {
  font-size: 15px;
  color: var(--ink-soft);
}

.pricing {
  max-width: 460px;
  margin: 0 auto;
  background: var(--paper-warm);
  border: 2px solid var(--ocean);
  border-radius: 12px;
  padding: 36px;
  text-align: center;
}
.pricing .name {
  font-size: 14px;
  color: var(--ocean);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  margin-bottom: 8px;
}
.pricing .price {
  font-size: 44px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 4px;
}
.pricing .price small {
  font-size: 17px;
  font-weight: 500;
  color: var(--ink-mute);
}
.pricing ul {
  list-style: none;
  text-align: left;
  margin: 24px 0;
}
.pricing li {
  padding: 8px 0;
  color: var(--ink-soft);
  font-size: 15px;
  padding-left: 28px;
  position: relative;
}
.pricing li::before {
  content: "\2713";
  position: absolute;
  left: 0;
  color: var(--ocean);
  font-weight: 700;
}
.pricing .btn { width: 100%; }
.pricing .note {
  font-size: 13px;
  color: var(--ink-mute);
  margin-top: 16px;
}

footer {
  padding: 40px 0;
  border-top: 1px solid var(--line);
  color: var(--ink-mute);
  font-size: 14px;
  text-align: center;
}
footer a { color: var(--ink-soft); margin: 0 12px; }

@media (max-width: 640px) {
  .hero { padding: 56px 0 48px; }
  .hero h1 { font-size: 32px; }
  .hero .sub { font-size: 16px; }
  nav a { display: none; }
  nav .btn { display: inline-block; }
}