body {
  margin: 0;
  font-family: system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif;
  background: linear-gradient(135deg,#0f2027,#203a43,#2c5364);
  color: #fff;
  padding: 20px;
  line-height: 1.6;
}

.container {
  max-width: 720px;
  margin: auto;
  background: #ffffff14;
  backdrop-filter: blur(10px);
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 8px 24px rgba(0,0,0,.35);
}

h1 {
  color: #FFD700;
  text-align: center;
  margin-bottom: 20px;
}

p {
  margin-bottom: 12px;
}

.payment-methods {
  display: flex;
  justify-content: space-between; /* solda SBP, sağda Card */
  align-items: center;
  gap: 20px; /* aralarına biraz boşluk */
  margin-bottom: 15px;
}

.payment-method {
  flex: 1; /* eşit genişlikte olsunlar */
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid #ccc;
  border-radius: 8px;
  padding: 8px;
  background: rgba(255,255,255,0.05);
  cursor: pointer;
}

.payment-method input {
  margin-right: 8px;
}