/* App-level layout + resets. Element Plus ships its own component styles. */

:root {
  --yk-header-height: 56px;
  --yk-aside-width: 260px;
  --yk-bg: #f5f7fa;
  --yk-border: #e4e7ed;
}

* {
  box-sizing: border-box;
}

html,
body,
#app {
  height: 100%;
  margin: 0;
}

body {
  font-family:
    'Helvetica Neue', Helvetica, 'PingFang SC', 'Hiragino Sans GB',
    'Microsoft YaHei', Arial, sans-serif;
  font-size: 14px;
  color: #303133;
  background: var(--yk-bg);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--el-color-primary, #409eff);
  text-decoration: none;
}

/* Layout shell ----------------------------------------------------------- */

.yk-app {
  height: 100%;
}

.yk-header {
  display: flex;
  align-items: center;
  gap: 16px;
  height: var(--yk-header-height);
  padding: 0 20px;
  background: #fff;
  border-bottom: 1px solid var(--yk-border);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}

.yk-header__title {
  font-size: 18px;
  font-weight: 600;
  margin: 0;
  white-space: nowrap;
}

.yk-header__spacer {
  flex: 1;
}

.yk-aside {
  background: #fff;
  border-right: 1px solid var(--yk-border);
  overflow: auto;
}

.yk-aside__search {
  padding: 10px 12px 6px;
}

.yk-aside__tree {
  padding: 4px 6px 16px;
}

.yk-main {
  padding: 16px;
  background: var(--yk-bg);
  overflow: auto;
}

/* Empty / loading placeholders */
.yk-empty {
  padding: 40px 0;
  color: #909399;
  text-align: center;
}

/* Chat timeline ---------------------------------------------------------- */

.yk-chat {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.yk-chat__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.yk-chat__title {
  font-size: 16px;
  font-weight: 600;
  margin: 0;
}

.yk-chat__sub {
  color: #909399;
  font-size: 13px;
}

.yk-chat__stream {
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: #fff;
  border: 1px solid var(--yk-border);
  border-radius: 8px;
  padding: 16px;
}

.yk-chat__load {
  display: flex;
  justify-content: center;
  padding: 8px 0 12px;
}

.yk-chat__end {
  text-align: center;
  color: #c0c4cc;
  font-size: 12px;
  padding: 6px 0 2px;
}

/* Message bubble */
.yk-msg {
  display: flex;
  width: 100%;
  padding: 6px 0;
}

.yk-msg--send {
  flex-direction: row-reverse;
}

.yk-msg__row {
  display: flex;
  flex-direction: column;
  max-width: 70%;
}

.yk-msg--send .yk-msg__row {
  align-items: flex-end;
}

.yk-msg__meta {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 12px;
  color: #909399;
  padding: 0 4px 2px;
}

.yk-msg--send .yk-msg__meta {
  flex-direction: row-reverse;
}

.yk-msg__bubble {
  padding: 8px 12px;
  border-radius: 10px;
  background: #f4f4f5;
  color: #303133;
  line-height: 1.5;
  word-break: break-word;
  white-space: pre-wrap;
}

.yk-msg--send .yk-msg__bubble {
  background: var(--el-color-primary-light-8, #d9ecff);
  color: #1d2129;
}

.yk-msg__image {
  max-width: 220px;
  max-height: 220px;
  border-radius: 8px;
  display: block;
  cursor: zoom-in;
}

.yk-msg__video {
  max-width: 280px;
  max-height: 280px;
  border-radius: 8px;
  display: block;
}

.yk-msg__chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-radius: 16px;
  background: #ecf5ff;
  color: var(--el-color-primary, #409eff);
  font-size: 13px;
  cursor: default;
}

.yk-msg__chip--download {
  cursor: pointer;
  text-decoration: none;
}

.yk-msg__transcript {
  margin-top: 4px;
  font-size: 12px;
  color: #909399;
  font-style: italic;
  padding: 0 4px;
}

/* Centered faint row for divider / system messages */
.yk-msg--center {
  justify-content: center;
}

.yk-msg__divider {
  font-size: 12px;
  color: #909399;
  background: transparent;
  text-align: center;
  padding: 2px 8px;
}

.yk-clickable-row {
  cursor: pointer;
}

.yk-channel-tag {
  margin-right: 4px;
}