/* Read the Docs 风格的版本菜单样式 */
.rtd-version-menu {
  position: relative;
  display: block;
  margin: 4px auto;
  width: calc(30% - 6px);
  text-align: center;
}

/* 项目标题字体大小调整 */
.wy-nav-side .icon.icon-home {
  font-size: 19px;
  font-weight: 650;
  margin-top: 8px;
  margin-bottom: 2px;
}

.rtd-version-menu__button {
  background: #f8f9fa;
  border: 1px solid #dee2e6;
  border-radius: 3px;
  color: #495057;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11px;
  font-weight: 500;
  line-height: 14px;
  padding: 4px 8px;
  position: relative;
  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
  white-space: nowrap;
  width: 100%;
  min-width: 80px;
  margin: 0 auto;
}

.rtd-version-menu__button:hover {
  border-color: #0969da;
  box-shadow: 0 0 0 3px rgba(9, 105, 218, 0.1);
  background: #e9ecef;
}

.rtd-version-menu__button:focus {
  border-color: #0969da;
  box-shadow: 0 0 0 3px rgba(9, 105, 218, 0.1);
  outline: none;
}

.rtd-version-menu__button::after {
  content: "";
  border: 2px solid transparent;
  border-top-color: currentColor;
  margin-left: 4px;
  transition: transform 0.15s ease-in-out;
  flex-shrink: 0;
}

.rtd-version-menu__button[aria-expanded="true"]::after {
  transform: rotate(180deg);
}

.rtd-version-menu__dropdown {
  background: #ffffff;
  border: 1px solid #d0d7de;
  border-radius: 3px;
  box-shadow: 0 8px 24px rgba(140, 149, 159, 0.2);
  display: none;
  left: 50%;
  margin-top: 2px;
  min-width: 100%;
  padding: 2px 0;
  position: absolute;
  top: 100%;
  z-index: 1000;
  width: 100%;
  transform: translateX(-50%);
}

.rtd-version-menu__dropdown.show {
  display: block;
}

.rtd-version-menu__item {
  background: transparent;
  border: 0;
  color: #24292f;
  cursor: pointer;
  display: block;
  font-size: 11px;
  line-height: 14px;
  padding: 4px 10px;
  text-align: left;
  text-decoration: none;
  width: 100%;
  white-space: nowrap;
}

.rtd-version-menu__item:hover {
  background-color: #f6f8fa;
  color: #24292f;
  text-decoration: none;
}

.rtd-version-menu__item:focus {
  background-color: #f6f8fa;
  color: #24292f;
  outline: none;
  text-decoration: none;
}

.rtd-version-menu__item.active {
  background-color: #0969da;
  color: #ffffff;
}

.rtd-version-menu__item.active:hover {
  background-color: #0858b9;
  color: #ffffff;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .rtd-version-menu {
    margin: 2px auto;
    width: calc(50% - 8px);
  }
  
  .rtd-version-menu__button {
    font-size: 10px;
    padding: 3px 6px;
  }
  
  .rtd-version-menu__item {
    font-size: 10px;
    padding: 3px 8px;
  }
  
  /* 移动端项目标题字体大小 */
  .wy-nav-side .icon.icon-home {
    font-size: 12px;
  }
}

/* 深色主题支持 */
@media (prefers-color-scheme: dark) {
  .rtd-version-menu__button {
    background: #21262d;
    border-color: #30363d;
    color: #f0f6fc;
  }
  
  .rtd-version-menu__button:hover {
    border-color: #58a6ff;
    box-shadow: 0 0 0 3px rgba(56, 139, 253, 0.1);
    background: #30363d;
  }
  
  .rtd-version-menu__dropdown {
    background: #21262d;
    border-color: #30363d;
    box-shadow: 0 8px 24px rgba(1, 4, 9, 0.3);
  }
  
  .rtd-version-menu__item {
    color: #f0f6fc;
  }
  
  .rtd-version-menu__item:hover {
    background-color: #30363d;
    color: #f0f6fc;
  }
  
  .rtd-version-menu__item.active {
    background-color: #58a6ff;
    color: #0d1117;
  }
  
  .rtd-version-menu__item.active:hover {
    background-color: #1f6feb;
    color: #0d1117;
  }
}