body {
    background: linear-gradient(135deg, #fff7f0, #ffe4e1); /* 회원가입 페이지에만 적용되는 배경*/
  }

  .signup-container {
    background: white;
    border-radius: 20px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
    width: 90%;
    max-width: 500px;
    margin: 80px auto;
    padding: 2rem;
  }

  .logo-wrap {
    text-align: center;
    margin-bottom: 1.5rem;
  }

  .logo-wrap img {
    height: 80px;
    margin-bottom: -0.6rem;
  }

  h2 {
    text-align: center;
    color: #333;
    margin-bottom: 1.3rem;
  }

  form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
  }

  input[type="text"],
  input[type="email"],
  input[type="id"],
  input[type="password"] {
    padding: 0.75rem;
    border: 1px solid #ccc;
    border-radius: 10px;
    font-size: 1rem;
  }
  
  
  .signup-btn {
    padding: 0.75rem;
    background: #6b4cff;
    color: white;
    border: none;
    border-radius: 10px;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.2s;
  }

  .signup-btn:hover {
    background: #5432dc;
  }

  .extra {
    text-align: center;
    margin-top: 1rem;
    font-size: 0.9rem;
  }

  .extra a {
    color: #6b4cff;
    text-decoration: none;
  }

  .error-msg {
    color: red;
    font-size: 0.9rem;
    text-align: center;
  }

  html.dark body .signup-container {
    background: rgb(0, 0, 0);
    border-radius: 20px;
    /* 기존 그림자를 유지하면서 황금빛 글로우 효과 추가 */
    box-shadow: 
      0 8px 30px rgba(0, 0, 0, 0.1), /* 기존 그림자 */
      0 0 15px 5px rgba(255, 215, 0, 0.3), /* 황금빛 글로우 (확산 효과) */
      0 0 30px 10px rgba(255, 215, 0, 0.1); /* 더 넓고 흐린 황금빛 글로우 */
    width: 90%;
    max-width: 500px;
    margin: 80px auto;
    padding: 2rem;
    transition: box-shadow 0.3s ease-in-out;
  }

  html.dark body input[type="text"],
  html.dark body input[type="text"],
  html.dark body input[type="email"],
  html.dark body input[type="password"] {
    background: #333; /* 어두운 회색 계열 */
    color: #ffffff !important;      /* 글자색을 밝게 */
    border: 1px solid #555; /* 테두리도 어둡게 */
  }

  html.dark body h2 {
    color: white;
  }
  html.dark body  .extra a {
    color: #ff0101;
    text-decoration: none;
  }

  html.dark body  .extra a:hover {
    color: #fffcfc;
    text-decoration: none;
  }


  .input-with-button {
    display: flex;
    gap: 0.4rem;
    align-items: center;
    margin-bottom: -1rem; /* ✅ 기본 여백 줄이기 */
  }
  
  .input-with-button input[type="text"] {
    flex: 1;
    padding: 0.5rem 0.7rem;
    font-size: 0.95rem;
    border: 1px solid #ccc;
    border-radius: 6px;
    background-color: #fff;
  }
  
  .check-btn {
    padding: 0.25rem 0.6rem;
    font-size: 0.75rem;
    background-color: transparent;
    border: 1px solid #bbb;
    color: #555;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
  }
  
  .check-btn:hover {
    background-color: #f3f3f3;
    border-color: #888;
    color: #222;
  }
  
  .check-msg {
    height: 0;
    overflow: hidden;
    font-size: 0.85rem;
    transition: all 0.2s ease;
    opacity: 0;
    padding-left: 2px;
    margin-top: 0;       /* ✅ 여백 제거 */
    margin-bottom: 0;    /* ✅ 여백 제거 */
  }
  .check-msg.show {
    height: auto;
    margin-top: 0.2rem;   /* ✅ 보여줄 때만 살짝 여백 */
    margin-bottom: 0.7rem;
    opacity: 1;
  }
  
  .check-msg.valid {
    color: #2e8b57; /* 초록색 */
  }
  
  .check-msg.invalid {
    color: #d94343; /* 붉은색 */
  }
  
  .input-with-button input[type="text"],
input[type="email"],
input[type="password"] {
  width: 100%;
  box-sizing: border-box;
  padding: 0.75rem;
  font-size: 1rem;
  border: 1px solid #ccc;
  border-radius: 10px;
}

@media (max-width: 640px) {
    .signup-container {
      width: 100%;
      max-width: 320px;
      margin: 40px auto;
      padding: 1rem 0.8rem;
    }
  
    html.dark body .signup-container {
      width: 100%;
      max-width: 320px;
      margin: 40px auto;
      padding: 1rem 0.8rem;
    }
  }