html, body {
  font-family: 'Microsoft JhengHei';
  background-color: #ffffff;
}

main {
  max-width: 1000px;

  background-color: #f8f9fa;
  padding: 3rem;
  margin: 5rem auto;
  border-radius: 1rem;

  position: relative;
}

/* 語言 切換 */
#lang-switcher {
  position: absolute;
  top: 1rem;
  right: 1rem;
}
#lang-switcher .input-group-text {
  border-top-left-radius: 2rem;
  border-bottom-left-radius: 2rem;
}
#lang-switcher #languageSwitcher {
  max-width: 88px;
}

@media (max-width: 768px) {
  main {
    margin: 2rem auto;
    padding: 3rem 2rem;
  }
}



/* 自定義 表單元素 樣式 */
.form-label,
.col-form-label,
.form-check-label {
  font-size: .875rem;
  font-weight: bold;
  color: #4f4f4f;
}

.form-control,
.form-select,
.input-group .btn {
  border-radius: 2rem;
}

.dropdown-menu li a {
  cursor: pointer;
}



/* Logo */
.logo-img img {
  width: 180px;
  display: block;
  margin: 5rem auto;
}



/* Loading */
.spinner-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5); /* 半透明背景 */
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999; /* 确保在最上层 */
}
.spinner-overlay .spinner-content {
  height: 3rem;
  color: #ffffff;
}