* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
  background-color: #f4f6f8;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
}

.container {
  width: 100%;
  max-width: 420px;
}

.card {
  background: #ffffff;
  padding: 32px 24px;
  border-radius: 12px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.header {
  text-align: center;
  margin-bottom: 20px;
}

.badge {
  display: inline-block;
  background: #d97706;
  color: #fff;
  font-weight: bold;
  font-size: 11px;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 12px;
  letter-spacing: 1px;
}

.header h2 {
  color: #111;
  font-size: 22px;
  margin-bottom: 6px;
}

.header p {
  color: #666;
  font-size: 14px;
}

.amount-display {
  background: #fef3c7;
  border: 1px dashed #d97706;
  border-radius: 8px;
  padding: 16px;
  text-align: center;
  margin-bottom: 24px;
}

.amount-display .label {
  display: block;
  font-size: 12px;
  color: #92400e;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.amount-display .price {
  font-size: 28px;
  font-weight: 800;
  color: #d97706;
}

.form-group {
  margin-bottom: 20px;
}

label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: #333;
  margin-bottom: 6px;
}

input {
  width: 100%;
  padding: 12px;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 15px;
  outline: none;
  transition: border-color 0.2s;
}

input:focus {
  border-color: #d97706;
}

button {
  width: 100%;
  background: #00a859;
  color: white;
  border: none;
  padding: 14px;
  border-radius: 6px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

button:hover {
  background: #008f4c;
}

button:disabled {
  background: #a5d6a7;
  cursor: not-allowed;
}

.btn-secondary {
  background: #333;
}

.btn-secondary:hover {
  background: #111;
}

.status-alert {
  margin-top: 20px;
  padding: 12px 16px;
  border-radius: 6px;
  font-size: 14px;
  line-height: 1.4;
  text-align: center;
}

.status-alert.success {
  background-color: #e8f5e9;
  color: #2e7d32;
  border: 1px solid #c8e6c9;
}

.status-alert.error {
  background-color: #ffebee;
  color: #c62828;
  border: 1px solid #ffcdd2;
}

.status-alert.info {
  background-color: #e3f2fd;
  color: #1565c0;
  border: 1px solid #bbdefb;
}

.hidden {
  display: none;
}