.contact-container {
  width: 60%;
  max-width: 800px;
  background-color: rgba(19, 41, 61, 0.9);
  border: 2px solid #6dd5ed;
  border-radius: 15px;
  padding: 2rem 3rem;
  color: #f0f0f0;
  box-sizing: border-box;
}

.contact-container h2 {
  font-size: 2rem;
  text-align: center;
  margin-top: 0;
  margin-bottom: 1rem;
}

.info-text {
  text-align: center;
  margin-bottom: 2rem;
  color: #ccc;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-weight: bold;
  margin-bottom: 0.5rem;
}

.form-group input[type="email"],
.form-group input[type="text"],
.form-group textarea {
  width: 100%;
  padding: 0.8rem;
  font-size: 1rem;
  border-radius: 5px;
  border: 1px solid #ccc;
  background-color: #f0f0f0;
  color: #333;
  box-sizing: border-box;
}

.submit-btn {
  display: block;
  width: 100%;
  padding: 1rem;
  font-size: 1.1rem;
  font-weight: bold;
  color: white;
  background-color: #007bff;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.submit-btn:hover {
  background-color: #0056b3;
}

.back-to-settings-btn {
  display: block;
  text-align: center;
  margin-top: 2rem;
  color: #6dd5ed;
  text-decoration: none;
}

.back-to-settings-btn:hover {
  text-decoration: underline;
}

/* flashメッセージ */
.flash-success, .flash-error {
  padding: 1rem;
  margin-bottom: 1rem;
  border-radius: 0.5rem;
}
.flash-success {
  background-color: rgba(40, 167, 69, 0.2);
  border: 1px solid #28a745;
  color: #28a745;
}
.flash-error {
  background-color: rgba(220, 53, 69, 0.1);
  border: 1px solid #dc3545;
  color: #dc3545;
}