:root {
  --bg: #020617;
  --bg-light: #0b1220;
  --text-main: #020617;
  --text-soft: #6b7280;
  --accent: #38bdf8;
}
* { box-sizing: border-box; }
body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  margin: 0;
  padding: 0;
  color: var(--text-main);
  background: #ffffff;
}
header {
  padding: 1.25rem 1.5rem 2.5rem;
  background: linear-gradient(135deg, var(--bg), var(--bg-light));
  color: #f9fafb;
}
.topbar {
  max-width: 1040px;
  margin: 0 auto 1.75rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.brand {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.brand-title {
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 0.9rem;
}
.brand-sub {
  font-size: 0.8rem;
  color: #cbd5f5;
}
.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  align-items: center;
  justify-content: flex-end;
  font-size: 0.9rem;
}
.nav a {
  color: #e5e7eb;
  text-decoration: none;
  padding-bottom: 0.15rem;
  border-bottom: 1px solid transparent;
}
.nav a:hover {
  border-bottom-color: rgba(148,163,184,0.9);
}
.nav a.active {
  border-bottom-color: var(--accent);
}
.nav a.nav-cta {
  border: none;
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  background: var(--accent);
  color: #0f172a;
  font-weight: 500;
  box-shadow: 0 10px 25px rgba(56,189,248,0.35);
}
.nav a.nav-cta:hover {
  border: none;
  box-shadow: 0 14px 32px rgba(56,189,248,0.45);
}
.subtitle-header {
  max-width: 1040px;
  margin: 0 auto;
}
h1 {
  margin: 0.5rem 0 0.3rem;
  font-size: 1.9rem;
}
.subtitle {
  margin-top: 0.25rem;
  font-size: 0.95rem;
  color: #cbd5f5;
  max-width: 640px;
}
main {
  max-width: 1040px;
  margin: 2.5rem auto;
  padding: 0 1.5rem 3rem;
}
h2 {
  margin: 0 0 0.75rem;
  font-size: 1.35rem;
}
h3 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
}
p { margin: 0.4rem 0 0.5rem; }
.caps {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
  color: var(--text-soft);
}
.soft {
  color: var(--text-soft);
  font-size: 0.93rem;
}
.section {
  margin-bottom: 2.4rem;
}
ul { padding-left: 1.2rem; margin: 0.4rem 0 0; }
li { margin-bottom: 0.25rem; font-size: 0.9rem; }
.btn-primary {
  display: inline-block;
  padding: 0.7rem 1.4rem;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  background: var(--accent);
  color: #0f172a;
  box-shadow: 0 10px 25px rgba(56,189,248,0.35);
  transition: transform 0.08s ease-out, box-shadow 0.08s ease-out;
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 32px rgba(56,189,248,0.45);
}
a { color: #2563eb; text-decoration: none; }
a:hover { text-decoration: underline; }
footer {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-soft);
  margin: 0 0 1.5rem;
  padding: 0 1.5rem;
}