.mailmag-approval {
  display: flex;
  justify-content: center;
  padding: 40px 20px;
}

.mailmag-approval__card {
  width: 100%;
  max-width: 480px;
  box-sizing: border-box;
  background: #fff;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  padding: 40px 30px;
  text-align: center;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", Meiryo, sans-serif;
}

.mailmag-approval__icon {
  display: block;
  width: 48px;
  height: 48px;
  line-height: 48px;
  margin: 0 auto 16px;
  border-radius: 50%;
  color: #fff;
  font-size: 22px;
  font-weight: bold;
}

.mailmag-approval__card--success .mailmag-approval__icon {
  background: #2e7d32;
}

.mailmag-approval__card--error .mailmag-approval__icon {
  background: #c0392b;
}

.mailmag-approval__title {
  margin: 0 0 20px;
  font-size: 20px;
  font-weight: bold;
  color: #333;
}

.mailmag-approval__text,
.mailmag-approval__message {
  margin: 0 0 30px;
  font-size: 15px;
  line-height: 1.8;
  color: #333;
}

.mailmag-approval__text--error {
  color: #c0392b;
  font-weight: bold;
}

.mailmag-approval__field {
  margin: 0 0 20px;
  text-align: left;
}

.mailmag-approval__field label {
  display: block;
  margin-bottom: 6px;
  font-size: 14px;
  font-weight: bold;
  color: #333;
}

.mailmag-approval__field input {
  box-sizing: border-box;
  width: 100%;
  height: 42px;
  padding: 0 12px;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 15px;
}

.mailmag-approval__card--success .mailmag-approval__message,
.mailmag-approval__card--error .mailmag-approval__message {
  margin-bottom: 0;
}

.mailmag-approval__button {
  display: inline-block;
  box-sizing: border-box;
  width: 223px;
  max-width: 100%;
  height: 44px;
  border: none;
  border-radius: 5px;
  background: #2563eb;
  color: #fff;
  text-align: center;
  font-size: 15px;
  font-weight: bold;
  line-height: 44px;
  cursor: pointer;
  transition: background-color 0.3s;
}

.mailmag-approval__button:hover {
  background-color: #1d4ed8;
}

@media only screen and (max-width: 767px) {
  .mailmag-approval__button {
    width: 80%;
  }
}