body {
  margin: 0;
  font-family: Arial, sans-serif;
  color: #333;
  line-height: 1.6;
  background-color: #f9f9f9;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 40px;
  background: #fff;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.nav-logo {
  font-weight: bold;
  color: #e2136e;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 20px;
  margin: 0;
  padding: 0;
}

.nav-links a {
  text-decoration: none;
  color: #333;
}

.hero {
  text-align: center;
  padding: 120px 20px 100px;
  background: linear-gradient(135deg,#e2136e,#ff6a88);
  color: #fff;
}

.btn-primary {
  display: inline-block;
  margin-top: 20px;
  padding: 12px 28px;
  background: #fff;
  color: #e2136e;
  text-decoration: none;
  border-radius: 4px;
}

.features {
  max-width: 1000px;
  margin: 60px auto;
  padding: 0 20px;
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.feature-card {
  flex: 1 1 250px;
  background: #fff;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.demo {
  max-width: 800px;
  margin: 60px auto;
  padding: 0 20px;
  text-align: center;
}

.demo input {
  padding: 8px;
  margin-right: 10px;
}

#status {
  margin-top: 10px;
}

.footer {
  text-align: center;
  padding: 20px;
  background: #eaeaea;
  margin-top: 60px;
}

.content {
  max-width: 800px;
  margin: 40px auto;
  padding: 0 20px;
}

pre {
  background: #f4f4f4;
  padding: 10px;
  overflow-x: auto;
}

code {
  font-family: monospace;
}

.bkash-pay-button {
  background: #e2136e;
  color: #fff;
  border: none;
  padding: 10px 20px;
  border-radius: 4px;
  cursor: pointer;
}

.bkash-pay-button:hover {
  background: #c5115d;
}

.bkash-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  visibility: hidden;
}

.bkash-modal.active {
  visibility: visible;
}

.bkash-modal-content {
  background: #fff;
  padding: 20px;
  border-radius: 8px;
  width: 300px;
  text-align: center;
}

.bkash-modal-content input {
  width: 100%;
  padding: 8px;
  margin-bottom: 10px;
}