:root {
  --comment-bg-color: #fff;
  --text-color: #222;
  --selected-bg-color: #fff;
  --no-selected-bg-color: #eee;
  --dropdown-hover-bg: #f5f5f5;
  --border-color: #c5d0dc;
  --border-focus-color: #4c8fbd;
  --loading-border-color: #eee;
  --disabled-color: #999;
  color-scheme: light;
}

.dark-theme {
  --comment-bg-color: #444;
  --text-color: #fff;
  --selected-bg-color: #222;
  --no-selected-bg-color: #444;
  --dropdown-hover-bg: #505050;
  --border-color: #c5d0dc;
  --border-focus-color: #4c8fbd;
  --loading-border-color: #f0f6fc;
  --disabled-color: #888;
  color-scheme: dark;
}

.comment-wrap {
  width: 100%;
  height: 100%;
  -webkit-box-flex: 1;
  -moz-box-flex: 1;
  -o-box-flex: 1;
  box-flex: 1;
  -webkit-flex: 1 auto;
  -ms-flex: 1 auto;
  flex: 1 auto;
  padding: 5px 0;
  border: none;
}

.comment-inner {
  position: relative;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
  width: 100%;
  max-width: 768px;
  min-height: 120px;
  background: var(--comment-bg-color);
  margin-left: auto;
  margin-right: auto;
  padding: 5px;
}

.comments {
  margin: 0;
  padding: 0;
}

/* Tabs 相关样式 - 增加 comments- 前缀 */
.comments-nav {
  padding-left: 0;
  margin-bottom: 0;
  list-style: none;
  zoom: 1;
}

.comments-nav:before,
.comments-nav:after {
  content: "";
  display: table;
}

.comments-nav:after {
  clear: both;
}

.comments-nav > li {
  position: relative;
  display: block;
}

.comments-nav > li > a {
  display: block;
  text-decoration: none;
  padding: 10px 15px;
}

@media (hover: hover) {
  .comments-nav > li > a:hover {
    background-color: var(--no-selected-bg-color);
  }
}

.comments-nav > li > a.disabled > a {
  color: var(--disabled-color);
  pointer-events: none;
  background-color: transparent;
}

.comments-tabbable {
  position: relative;
}

.comments-nav-tabs {
  display: flex;
  flex-wrap: nowrap;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  -ms-overflow-style: none;
  border-bottom: 1px solid var(--border-color);
  zoom: 1;
}

.comments-nav-tabs::-webkit-scrollbar {
  display: none;
}

.comments-nav-tabs:before,
.comments-nav-tabs:after {
  content: "";
  display: table;
}

.comments-nav-tabs:after {
  clear: both;
}

.comments-nav-tabs > li {
  flex-shrink: 0;
  margin-right: -1px;
}

.comments-nav-tabs > li > a {
  background: var(--no-selected-bg-color);
  border: 1px solid var(--border-color);
  color: var(--text-color);
  padding: 8px 12px;
  line-height: 16px;
  position: relative;
  z-index: 11;
}

@media (hover: hover) {
  .comments-nav-tabs > li > a:hover {
    background: var(--selected-bg-color);
    color: #4c8fbd;
  }
}

.comments-nav-tabs > li.active > a {
  cursor: default !important;
  background: var(--selected-bg-color);
  color: #4c8fbd;
  border-top: 2px solid var(--border-focus-color);
  border-bottom-color: transparent;
  z-index: 12;
  margin-top: -1px;
  -webkit-box-shadow: 0 -2px 3px rgba(0,0,0,0.15);
  box-shadow: 0 -2px 3px rgba(0,0,0,0.15);
}

.comments-tab-content {
  border: 1px solid var(--border-color);
  padding: 16px 12px;
  position: relative;
  z-index: 11;
}

.comments-tab-content > .comments-tab-pane {
  display: none;
  position: relative;
  min-height: 120px;
}

.comments-tab-content > .comments-tab-pane.active {
  display: block;
}

/* Dropdown 相关样式 - 增加 comments- 前缀 */
.comments-dropdown {
  position: relative;
}

.comments-selector {
  margin-bottom: 16px;
}

.comments-custom-dropdown {
  position: relative;
  width: 100%;
}

.comments-dropdown-trigger {
  width: 100%;
  height: 42px;
  padding: 0 16px;
  font-size: 14px;
  font-family: inherit;
  color: var(--text-color);
  background-color: var(--comment-bg-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  outline: none;
  transition: all 0.2s ease;
  box-sizing: border-box;
}

.comments-dropdown-trigger:hover {
  border-color: var(--border-focus-color);
  background-color: var(--dropdown-hover-bg);
}

.comments-dropdown-trigger:focus-visible {
  border-color: var(--border-focus-color);
  box-shadow: 0 0 0 3px rgba(76, 143, 189, 0.15);
}

.comments-dropdown-trigger[aria-expanded="true"] {
  border-color: var(--border-focus-color);
  box-shadow: 0 0 0 3px rgba(76, 143, 189, 0.15);
  border-radius: 8px 8px 0 0;
}

.comments-dropdown-label {
  display: flex;
  align-items: center;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.comments-dropdown-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 500;
}

.comments-dropdown-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-left: 8px;
  color: var(--text-color);
  transition: transform 0.2s ease;
}

.comments-dropdown-trigger[aria-expanded="true"] .comments-dropdown-arrow {
  transform: rotate(180deg);
}

.comments-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--comment-bg-color);
  border: 1px solid var(--border-focus-color);
  border-top: none;
  border-radius: 0 0 8px 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  z-index: 1000;
  display: none;
  overflow: hidden;
  animation: dropdownFadeIn 0.15s ease;
}

.comments-dropdown-menu.show {
  display: block;
}

@keyframes dropdownFadeIn {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.comments-dropdown-item {
  padding: 10px 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background-color 0.15s ease;
  color: var(--text-color);
  font-size: 14px;
}

.comments-dropdown-item:hover {
  background-color: var(--dropdown-hover-bg);
}

.comments-dropdown-item:active {
  background-color: rgba(76, 143, 189, 0.1);
}

.comments-dropdown-item.active {
  background-color: rgba(76, 143, 189, 0.08);
  color: #4c8fbd;
  font-weight: 500;
}

.comments-dropdown-item-text {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.comments-dropdown-check {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  margin-left: 8px;
  color: #4c8fbd;
}

.dark-theme .comments-dropdown-menu {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.dark-theme .comments-dropdown-item.active {
  background-color: rgba(76, 143, 189, 0.15);
}

/* 响应式适配 */
@media (max-width: 768px) {
  .comments-dropdown-trigger {
    height: 44px;
    font-size: 15px;
  }
  
  .comments-dropdown-item {
    padding: 12px 16px;
  }
}

.comments-dropdown-content {
  border: 1px solid var(--border-color);
  padding: 16px 12px;
  position: relative;
}

.comments-dropdown-content > .comments-dropdown-pane {
  display: none;
  position: relative;
  min-height: 120px;
}

.comments-dropdown-content > .comments-dropdown-pane.active {
  display: block;
}

/* Loading 相关样式 */
.loading-indicator {
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
  -moz-transform: translate(-50%, -50%);
  -o-transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
  text-align: center;
  z-index: 10;
  -webkit-transition: opacity 0.3s;
  -moz-transition: opacity 0.3s;
  -o-transition: opacity 0.3s;
  -ms-transition: opacity 0.3s;
  transition: opacity 0.3s;
  will-change: opacity;
}

.loading-indicator .spinner {
  width: 40px;
  height: 40px;
  margin: 0 auto 10px;
  border: 4px solid var(--loading-border-color);
  border-top-color: #428bca;
  border-radius: 50%;
  -webkit-animation: spin 1s linear infinite;
  -moz-animation: spin 1s linear infinite;
  -o-animation: spin 1s linear infinite;
  -ms-animation: spin 1s linear infinite;
  animation: spin 1s linear infinite;
}

.loading-indicator span {
  color: var(--text-color);
}

.loading-indicator.hidden {
  opacity: 0;
  -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=0)";
  filter: alpha(opacity=0);
  pointer-events: none;
}

@media (prefers-reduced-motion: reduce) {
  .spinner {
    -webkit-animation: none;
    -moz-animation: none;
    -o-animation: none;
    -ms-animation: none;
    animation: none;
  }
  .loading-indicator {
    -webkit-transition: none;
    -moz-transition: none;
    -o-transition: none;
    -ms-transition: none;
    transition: none;
  }
}

@-moz-keyframes spin {
  from {
    -webkit-transform: rotate(0deg);
    -moz-transform: rotate(0deg);
    -o-transform: rotate(0deg);
    -ms-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  to {
    -webkit-transform: rotate(360deg);
    -moz-transform: rotate(360deg);
    -o-transform: rotate(360deg);
    -ms-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}

@-webkit-keyframes spin {
  from {
    -webkit-transform: rotate(0deg);
    -moz-transform: rotate(0deg);
    -o-transform: rotate(0deg);
    -ms-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  to {
    -webkit-transform: rotate(360deg);
    -moz-transform: rotate(360deg);
    -o-transform: rotate(360deg);
    -ms-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}

@-o-keyframes spin {
  from {
    -webkit-transform: rotate(0deg);
    -moz-transform: rotate(0deg);
    -o-transform: rotate(0deg);
    -ms-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  to {
    -webkit-transform: rotate(360deg);
    -moz-transform: rotate(360deg);
    -o-transform: rotate(360deg);
    -ms-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}

@keyframes spin {
  from {
    -webkit-transform: rotate(0deg);
    -moz-transform: rotate(0deg);
    -o-transform: rotate(0deg);
    -ms-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  to {
    -webkit-transform: rotate(360deg);
    -moz-transform: rotate(360deg);
    -o-transform: rotate(360deg);
    -ms-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}