:root {
  --bg: #f6f7fb;
  --surface: rgba(255, 255, 255, 0.9);
  --surface-strong: #ffffff;
  --text: #111827;
  --muted: #4b5563;
  --line: rgba(17, 24, 39, 0.1);
  --accent: #2563eb;
  --accent-soft: rgba(37, 99, 235, 0.12);
  --shadow: 0 24px 64px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(59, 130, 246, 0.16), transparent 34%),
    linear-gradient(180deg, #ffffff 0%, var(--bg) 100%);
}

a {
  color: inherit;
}

.shell {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(18px);
  background: rgba(246, 247, 251, 0.88);
  border-bottom: 1px solid var(--line);
}

.nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-mark {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--text);
  color: #ffffff;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 14px;
  font-size: 0.95rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--muted);
}

.nav-links a[aria-current="page"] {
  color: var(--text);
  font-weight: 700;
}

.hero {
  padding: 88px 0 28px;
}

.hero-card,
.section,
.faq,
.footer-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 32px;
  display: grid;
  gap: 28px;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

h1,
h2,
h3 {
  margin: 0;
  letter-spacing: -0.04em;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4.25rem);
  line-height: 0.98;
}

h2 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  line-height: 1.05;
}

h3 {
  font-size: 1.35rem;
  line-height: 1.1;
}

p {
  margin: 0;
  color: var(--muted);
  line-height: 1.72;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 10px;
}

.button,
.button-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 20px;
  border-radius: 16px;
  text-decoration: none;
  font-weight: 700;
}

.button {
  background: var(--text);
  color: #ffffff;
}

.button-secondary {
  border: 1px solid var(--line);
  background: #ffffff;
}

.signal {
  display: grid;
  gap: 14px;
  padding: 24px;
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(17, 24, 39, 0.98), rgba(31, 41, 55, 0.95));
  color: #ffffff;
}

.signal p,
.signal li {
  color: rgba(255, 255, 255, 0.78);
}

.signal ul {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 10px;
}

.stack {
  display: grid;
  gap: 22px;
  margin: 26px 0 36px;
}

.section {
  padding: 28px;
}

.section-head {
  display: grid;
  gap: 10px;
  margin-bottom: 22px;
}

.cards {
  display: grid;
  gap: 16px;
}

.cards.three-up {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.cards.two-up {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card {
  padding: 20px;
  border-radius: 22px;
  background: var(--surface-strong);
  border: 1px solid var(--line);
}

.card ul {
  margin: 12px 0 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
  color: var(--muted);
}

.faq {
  padding: 28px;
}

.faq-list {
  display: grid;
  gap: 14px;
}

.faq details {
  padding: 18px 20px;
  border-radius: 18px;
  background: #ffffff;
  border: 1px solid var(--line);
}

.faq summary {
  cursor: pointer;
  font-weight: 700;
  list-style: none;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq details p {
  margin-top: 12px;
}

.footer {
  padding: 0 0 56px;
}

.footer-card {
  padding: 24px 28px;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.footer-links a {
  color: var(--muted);
  text-decoration: none;
}

@media (max-width: 880px) {
  .hero-card,
  .cards.three-up,
  .cards.two-up,
  .footer-card {
    grid-template-columns: 1fr;
    display: grid;
  }

  .nav-row {
    flex-direction: column;
    justify-content: center;
    padding: 16px 0;
  }

  .hero {
    padding-top: 44px;
  }

  .hero-card,
  .section,
  .faq,
  .footer-card {
    padding: 22px;
  }
}