:root {
  --navy: #031E4B;
  --navy-soft: #0a2a5e;
  --text: #1a1a1a;
  --text-muted: #4a4a4a;
  --bg: #ffffff;
  --bg-alt: #f6f8fb;
  --border: #e5e8ee;
  --max-width: 960px;
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue",
    Helvetica, Arial, "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background-color: var(--bg);
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

a {
  color: var(--navy);
  text-decoration: none;
}

a:hover,
a:focus {
  text-decoration: underline;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--border);
  background-color: var(--bg);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 18px;
  padding-bottom: 18px;
}

.brand {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: 0.01em;
}

.site-nav a {
  margin-left: 24px;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.site-nav a:first-child {
  margin-left: 0;
}

.site-nav a:hover,
.site-nav a:focus {
  color: var(--navy);
  text-decoration: none;
}

/* Hero */
.hero {
  padding: 96px 0 80px;
  background-color: var(--bg);
  border-bottom: 1px solid var(--border);
}

.eyebrow {
  margin: 0 0 16px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--navy);
}

.hero h1 {
  margin: 0 0 20px;
  font-size: clamp(1.875rem, 4vw, 2.625rem);
  line-height: 1.2;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: -0.01em;
}

.lede {
  margin: 0;
  max-width: 640px;
  font-size: 1.0625rem;
  color: var(--text-muted);
}

/* Sections */
.section {
  padding: 72px 0;
}

.section-alt {
  background-color: var(--bg-alt);
}

.section h2 {
  margin: 0 0 20px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: -0.005em;
}

.section p {
  margin: 0 0 12px;
  max-width: 680px;
  color: var(--text);
}

/* App card */
.app-card {
  background-color: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 28px 24px;
  max-width: 720px;
}

.app-card h3 {
  margin: 0 0 12px;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--navy);
}

.app-card__sub {
  margin-left: 8px;
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.app-card p {
  margin: 0 0 14px;
  color: var(--text);
}

.app-card__notes {
  margin: 0;
  padding-left: 20px;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.app-card__notes li {
  margin-bottom: 4px;
}

.app-card__links {
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 0.92rem;
  color: var(--text-muted);
}

.app-card__links a {
  font-weight: 600;
}

.app-card__links-sep {
  margin: 0 8px;
  color: var(--border);
}

/* Contact */
.contact-link {
  font-weight: 600;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  background-color: var(--bg);
  padding: 28px 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.copyright {
  margin: 0;
}

.footer-note {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-nav a {
  color: var(--text-muted);
}

.footer-nav a:hover,
.footer-nav a:focus {
  color: var(--navy);
}

.footer-sep {
  margin: 0 10px;
  color: var(--border);
}

/* Responsive */
@media (max-width: 600px) {
  .hero {
    padding: 64px 0 56px;
  }

  .section {
    padding: 56px 0;
  }

  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .site-nav a {
    margin-left: 0;
    margin-right: 18px;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .app-card {
    padding: 22px 20px;
  }

  .app-card__sub {
    display: block;
    margin-left: 0;
    margin-top: 4px;
  }
}