/* =========================
   Design system
   ========================= */
   :root {
    --bg: #ffffff;
    --bg-alt: #f6f7f9;
    --text: #0f172a;
    --muted: #64748b;
    --border: #e5e7eb;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --card: #ffffff;
  }
  
  @media (prefers-color-scheme: dark) {
    :root {
      --bg: #0b0e14;
      --bg-alt: #111827;
      --text: #e5e7eb;
      --muted: #9ca3af;
      --border: #1f2937;
      --accent: #60a5fa;
      --accent-hover: #3b82f6;
      --card: #0f172a;
    }
  }
  
  /* =========================
     Base
     ========================= */
  * {
    box-sizing: border-box;
  }
  
  html, body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, Inter, system-ui, sans-serif;
  }
  
  .container {
    max-width: 900px;
    padding: 0 20px;
    margin: 0 auto;
  }
  
  section {
    padding: 72px 0;
  }
  
  section:nth-of-type(even) {
    background: var(--bg-alt);
  }
  
  h1, h2, h3 {
    letter-spacing: -0.02em;
  }
  
  h1 {
    font-size: 2.8rem;
  }
  
  h2 {
    font-size: 2rem;
    margin-bottom: 24px;
  }
  
  p {
    color: var(--muted);
    line-height: 1.6;
  }
  
  a {
    color: var(--accent);
  }
  
  /* =========================
     Header / Hero
     ========================= */
  header {
    padding: 96px 0 72px;
    text-align: center;
  }

  .app-icon {
    border-radius: 22%;
    margin-bottom: 16px;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.12);
  }
  
  .eyebrow {
    font-size: 0.75rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 12px;
  }
  
  .hero-title {
    font-size: 2.6rem;
    margin: 16px 0;
  }
  
  .hero-subtitle {
    max-width: 720px;
    margin: 0 auto 28px;
  }
  
  .cta-row {
    display: flex;
    gap: 16px;
    justify-content: center;
    align-items: center;
    margin-bottom: 12px;
  }

  .app-store-badge img {
    display: block;
  }

  .hero-platforms {
    font-size: 0.9rem;
    color: var(--muted);
    margin-bottom: 16px;
  }
  
  .primary-cta,
  .secondary-cta {
    padding: 12px 18px;
    border-radius: 10px;
    font-weight: 600;
    text-decoration: none;
  }
  
  .primary-cta {
    background: var(--accent);
    color: white;
  }
  
  .primary-cta:hover {
    background: var(--accent-hover);
  }
  
  .secondary-cta {
    border: 1px solid var(--border);
    color: var(--text);
  }
  
  /* =========================
     Navigation
     ========================= */
  nav {
    margin-top: 16px;
  }
  
  nav a {
    margin: 0 10px;
    color: var(--muted);
    text-decoration: none;
  }
  
  nav a:hover {
    color: var(--text);
  }
  
  /* =========================
     Trust strip
     ========================= */
  #trust-strip {
    padding: 16px 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
  }
  
  .trust-strip {
    display: flex;
    justify-content: center;
    gap: 18px;
    font-size: 0.9rem;
    color: var(--muted);
    flex-wrap: wrap;
  }
  
  /* =========================
     Philosophy
     ========================= */
  .philosophy-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
  }
  
  .philosophy-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 22px;
  }
  
  /* =========================
     How it works
     ========================= */
  .step {
    margin-bottom: 64px;
  }
  
  .step img {
    margin-top: 16px;
    max-width: 100%;
    border-radius: 14px;
    border: 1px solid var(--border);
  }
  
  .step small {
    display: block;
    margin-top: 6px;
    color: var(--muted);
  }
  
  /* =========================
     Features
     ========================= */
  #features h3 {
    margin-top: 32px;
  }
  
  #features ul {
    list-style: none;
    padding-left: 0;
  }
  
  #features li {
    padding: 6px 0;
    color: var(--muted);
  }
  
  /* =========================
     Platforms
     ========================= */
  .platform-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
  }
  
  .platform-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 22px;
  }

  .platform-link {
    display: inline-block;
    margin-top: 10px;
    font-size: 0.9rem;
    font-weight: 600;
  }

  .install-primary {
    text-align: center;
    margin-bottom: 24px;
  }

  .install-primary .app-store-badge {
    display: inline-block;
    margin-bottom: 12px;
  }
  
  /* =========================
     Footer
     ========================= */
  footer {
    padding: 48px 0;
    text-align: center;
    border-top: 1px solid var(--border);
  }
  
  footer p {
    color: var(--muted);
  }