:root {
  --brand-navy: #141a38;
  --brand-blue: #3861d1;
  --brand-slate: #22357a;
  --bg: #f8fafc;
  --text: #334155;
  --text-muted: #64748b;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family:
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    'Segoe UI',
    Roboto,
    sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

.container {
  max-width: 56rem;
  margin: 0 auto;
  padding: 0 1.5rem;
}

header {
  padding: 1.5rem 0;
}

.logo {
  height: 2.5rem;
  width: auto;
}

.hero {
  padding: 3rem 0 4rem;
  text-align: center;
}

.hero h1 {
  margin: 1.5rem 0 0.75rem;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  color: var(--brand-navy);
  letter-spacing: -0.02em;
}

.hero p {
  margin: 0 auto;
  max-width: 36rem;
  font-size: 1.125rem;
  color: var(--text-muted);
}

.features {
  display: grid;
  gap: 1.5rem;
  padding: 2rem 0 3rem;
}

@media (min-width: 640px) {
  .features {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature {
  padding: 1.25rem;
  border-radius: 0.75rem;
  background: white;
  border: 1px solid #e2e8f0;
}

.feature h2 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--brand-navy);
}

.feature p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--text-muted);
}

.downloads {
  padding: 2rem 0 3rem;
  text-align: center;
}

.downloads h2 {
  margin: 0 0 1rem;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--brand-navy);
}

.download-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 0.5rem;
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.15s;
}

.btn-primary {
  background: var(--brand-blue);
  color: white;
}

.btn-primary:hover {
  background: var(--brand-navy);
}

.btn-secondary {
  background: white;
  color: var(--brand-navy);
  border: 1px solid #e2e8f0;
}

.btn-secondary:hover {
  background: #f1f5f9;
}

.privacy {
  padding: 2rem 0;
  text-align: center;
  font-size: 0.9375rem;
  color: var(--text-muted);
  border-top: 1px solid #e2e8f0;
}

footer {
  padding: 2rem 0 3rem;
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-muted);
}

footer a {
  color: var(--brand-blue);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

.install-note {
  margin-top: 1.5rem;
  padding: 1rem 1.25rem;
  border-radius: 0.5rem;
  background: #fffbeb;
  border: 1px solid #fde68a;
  font-size: 0.875rem;
  color: #92400e;
  text-align: left;
  max-width: 32rem;
  margin-left: auto;
  margin-right: auto;
}