body {
  font-family: 'Inter', 'Segoe UI', Arial, sans-serif;
  background: #f8fafc;
  color: #222;
  margin: 0;
  padding: 0;
}

header {
  background: linear-gradient(90deg, #2563eb 0%, #38bdf8 100%);
  color: #fff;
  text-align: center;
  padding: 2.5rem 1rem 1.5rem 1rem;
}

header h1 {
  font-size: 2.3rem;
  margin: 0 0 0.5rem 0;
  font-weight: 800;
  letter-spacing: -1px;
}

header p {
  font-size: 1.2rem;
  margin: 0;
  opacity: 0.95;
}

main {
  max-width: 600px;
  margin: 2.5rem auto;
  padding: 0 1.2rem;
}

section {
  margin-bottom: 2.5rem;
}

h2 {
  color: #2563eb;
  font-size: 1.4rem;
  margin-bottom: 1rem;
  font-weight: 700;
}

ol, ul {
  padding-left: 1.3em;
  margin: 0 0 1.2rem 0;
}

li {
  margin-bottom: 0.5em;
  font-size: 1.08rem;
}

.download-buttons {
  display: flex;
  gap: 1.2rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 1.2rem;
}

.download-btn {
  display: inline-block;
  background: linear-gradient(90deg, #2563eb 0%, #38bdf8 100%);
  color: #fff;
  font-weight: 700;
  padding: 1rem 2.2rem;
  border-radius: 12px;
  text-decoration: none;
  font-size: 1.1rem;
  box-shadow: 0 4px 16px rgba(59,130,246,0.13);
  transition: background 0.2s, transform 0.15s;
}

.download-btn:hover {
  background: linear-gradient(90deg, #38bdf8 0%, #2563eb 100%);
  transform: translateY(-2px) scale(1.04);
}

footer {
  text-align: center;
  padding: 2rem 1rem 1.2rem 1rem;
  color: #64748b;
  font-size: 0.98rem;
  background: #f1f5f9;
  border-top: 1px solid #e5e7eb;
}

footer a {
  color: #2563eb;
  text-decoration: underline;
}

@media (max-width: 600px) {
  header h1 {
    font-size: 1.4rem;
  }
  main {
    padding: 0 0.5rem;
  }
  .download-btn {
    padding: 0.7rem 1rem;
    font-size: 1rem;
  }
  h2 {
    font-size: 1.1rem;
  }
}