/* Reset box sizing */
* { box-sizing: border-box; }

/* Body styles */
body {
  margin: 0;
  font-family: "Segoe UI", Roboto, Arial, sans-serif;
  background: #f5f7fa;
  color: #1f2933;
}

/* Header */
header {
  background: linear-gradient(135deg, #0f172a, #020617);
  color: white;
  padding: 70px 20px;
  text-align: center;
}

header h1 {
  margin: 0;
  font-size: 2.5rem;
}

header p {
  margin-top: 10px;
  font-size: 1.1rem;
}

/* Container for main content */
.container {
  max-width: 900px;
  margin: auto;
  padding: 0 20px;
}

/* Main section */
main {
  padding: 40px 0;
}

/* Card component */
.card {
  background: white;
  border-radius: 10px;
  padding: 30px;
  margin-bottom: 25px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.08);
}

.card h2 {
  margin-top: 0;
  font-size: 1.6rem;
  color: #1f2933;
}

.card p, .card ul {
  font-size: 1rem;
  line-height: 1.6;
}

.card ul li {
  margin-bottom: 8px;
}

/* Download section */
.download {
  text-align: center;
}

.button {
  display: inline-block;
  margin-top: 15px;
  padding: 14px 32px;
  background: #2563eb;
  color: white;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 600;
  font-size: 1rem;
  transition: background 0.3s ease;
}

.button:hover {
  background: #1d4ed8;
  cursor: pointer;
}

/* Footer */
footer {
  text-align: center;
  padding: 20px;
  font-size: 14px;
  color: #64748b;
  border-top: 1px solid #e5e7eb;
}