.wsp-payment-form {
  max-width: 420px;
  margin: 0 auto;
  background: #ffffff;
  border-radius: 16px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.08);
  overflow: hidden;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.wsp-payment-header {
  background: linear-gradient(135deg, #635bff 0%, #8b5cf6 100%);
  color: #fff;
  padding: 28px;
  text-align: center;
}

.wsp-payment-header h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 600;
  opacity: 0.9;
}

.wsp-payment-amount {
  font-size: 36px;
  font-weight: 700;
}

.wsp-payment-form-inner {
  padding: 28px;
}

.wsp-form-row {
  margin-bottom: 18px;
}

.wsp-form-row label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: #0a2540;
  margin-bottom: 6px;
}

.wsp-form-row input,
.wsp-form-row select {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid #e3e8ee;
  border-radius: 10px;
  font-size: 15px;
  transition: all 0.2s;
  box-sizing: border-box;
}

.wsp-form-row input:focus,
.wsp-form-row select:focus {
  outline: none;
  border-color: #635bff;
  box-shadow: 0 0 0 3px rgba(99,91,255,0.12);
}

.wsp-submit-btn {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, #635bff 0%, #8b5cf6 100%);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  position: relative;
}

.wsp-submit-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(99,91,255,0.3);
}

.wsp-submit-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

.wsp-btn-spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: wsp-spin 0.7s linear infinite;
  vertical-align: middle;
}

@keyframes wsp-spin {
  to { transform: rotate(360deg); }
}

.wsp-payment-message {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
}

.wsp-payment-message.wsp-error {
  background: rgba(255,82,82,0.08);
  color: #c00;
}

.wsp-payment-message.wsp-success {
  background: rgba(0,217,36,0.08);
  color: #00a11c;
}

.wsp-payment-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: linear-gradient(135deg, #635bff 0%, #8b5cf6 100%);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.wsp-payment-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(99,91,255,0.3);
}

.wsp-payment-button:disabled,
.wsp-payment-button.wsp-loading {
  opacity: 0.6;
  cursor: not-allowed;
}

.wsp-error {
  color: #c00;
  font-size: 14px;
  padding: 12px;
  background: rgba(255,82,82,0.08);
  border-radius: 8px;
}

@media (max-width: 480px) {
  .wsp-payment-form {
    margin: 0 12px;
  }
  .wsp-payment-header {
    padding: 20px;
  }
  .wsp-payment-amount {
    font-size: 28px;
  }
}