/* 站内对话 Agent 页面的样式（独立资产，随 AGENT_CHAT.css 一起指纹化发布）。
 *
 * 为什么单独一个文件而不是并进 research-styles.css
 * ----------------------------------------------
 * research-styles.css 是**切片源**（style-src/*.css 才是可编辑的切片），
 * 往里加东西要重切、要重算 manifest。这里是全新页面的样式，单独成文件
 * 改动面最小，也更好回滚。
 *
 * 颜色沿用站点的 --yan-* 变量；变量缺失时给回退值，保证在
 * 经典版（classic-overrides.css）与 Clear 版都能读。
 */

.agent-chat-card {
  display: flex;
  flex-direction: column;
  min-height: 68vh;
}

.agent-chat-card .card-header {
  display: flex;
  align-items: center;
  gap: .5rem;
  flex-wrap: wrap;
}

.agent-chat-card .card-header .agent-chat-title {
  font-weight: 600;
}

.agent-chat-model-badge {
  background: var(--yan-primary-subtle, #e8eefc);
  color: var(--yan-primary, #1f4fd8);
  border: 1px solid var(--yan-primary-subtle, #c7d7f7);
  font-weight: 600;
}

.agent-chat-body {
  display: flex;
  flex-direction: column;
  gap: .75rem;
  flex: 1 1 auto;
  min-height: 0;
}

.agent-chat-side {
  display: flex;
  flex-direction: column;
  gap: .5rem;
}

.agent-chat-side__label {
  font-size: .72rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--yan-muted, #64748b);
  font-weight: 700;
}

.agent-chat-side__empty {
  font-size: .82rem;
  color: var(--yan-muted, #64748b);
  padding: .5rem .25rem;
}

.agent-chat-session-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  max-height: 42vh;
  overflow: auto;
}

.agent-chat-session {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: .5rem;
  width: 100%;
  padding: .35rem .5rem;
  border: 1px solid transparent;
  border-radius: .45rem;
  background: transparent;
  text-align: left;
  cursor: pointer;
  color: inherit;
  font: inherit;
}

.agent-chat-session:hover {
  background: rgba(31, 79, 216, .07);
}

.agent-chat-session.is-active {
  background: var(--yan-primary, #1f4fd8);
  color: #fff;
}

.agent-chat-session__title {
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: .84rem;
}

.agent-chat-session__time {
  font-size: .7rem;
  opacity: .7;
  flex: 0 0 auto;
}

.agent-chat-log {
  flex: 1 1 auto;
  min-height: 18rem;
  max-height: 56vh;
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: .6rem;
  padding: .5rem;
  border: 1px solid var(--yan-border, #e2e8f0);
  border-radius: .6rem;
  background: var(--yan-surface, #f8fafc);
}

.agent-chat-log.is-dragging {
  outline: 2px dashed var(--yan-primary, #1f4fd8);
  outline-offset: -4px;
}

.agent-chat-empty {
  margin: auto;
  max-width: 34rem;
  text-align: center;
  color: var(--yan-muted, #64748b);
}

.agent-chat-empty__title {
  font-weight: 700;
  color: var(--yan-text, #0f172a);
  margin-bottom: .35rem;
}

.agent-chat-empty__text {
  font-size: .86rem;
  line-height: 1.6;
}

.agent-chat-empty__hint {
  font-size: .8rem;
  margin-top: .5rem;
}

.agent-chat-msg {
  max-width: 92%;
}

.agent-chat-msg--user {
  align-self: flex-end;
}

.agent-chat-msg--assistant,
.agent-chat-msg--system {
  align-self: flex-start;
}

.agent-chat-msg--tool {
  align-self: flex-start;
  max-width: 100%;
  width: 100%;
}

.agent-chat-bubble {
  padding: .55rem .75rem;
  border-radius: .7rem;
  border: 1px solid var(--yan-border, #e2e8f0);
  background: #fff;
  font-size: .88rem;
  line-height: 1.65;
  white-space: pre-wrap;
  word-break: break-word;
}

.agent-chat-msg--user .agent-chat-bubble {
  background: var(--yan-primary, #1f4fd8);
  border-color: var(--yan-primary, #1f4fd8);
  color: #fff;
}

.agent-chat-bubble__meta {
  font-size: .7rem;
  color: var(--yan-muted, #64748b);
  margin-bottom: .25rem;
}

.agent-chat-bubble__text--muted {
  color: var(--yan-muted, #64748b);
}

.agent-chat-attachment-chip {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  margin: 0 .3rem .3rem 0;
  padding: .18rem .45rem;
  border-radius: 999px;
  background: rgba(15, 23, 42, .06);
  font-size: .78rem;
}

.agent-chat-msg--user .agent-chat-attachment-chip {
  background: rgba(255, 255, 255, .22);
}

.agent-chat-attachment-chip__remove {
  border: 0;
  background: transparent;
  color: inherit;
  cursor: pointer;
  font-size: .9rem;
  line-height: 1;
  padding: 0 .1rem;
}

.agent-chat-tool {
  display: flex;
  align-items: center;
  gap: .4rem;
  padding: .35rem .55rem;
  border: 1px solid var(--yan-border, #e2e8f0);
  border-radius: .5rem;
  background: #fff;
  cursor: pointer;
  font-size: .82rem;
}

.agent-chat-tool--ok { color: #15803d; }
.agent-chat-tool--bad { color: #b91c1c; }

.agent-chat-tool__hint {
  margin-left: auto;
  font-size: .72rem;
  color: var(--yan-muted, #64748b);
}

.agent-chat-tool__body {
  margin: .4rem 0 0;
  padding: .5rem;
  max-height: 18rem;
  overflow: auto;
  background: #0f172a;
  color: #e2e8f0;
  border-radius: .45rem;
  font-size: .74rem;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
}

.agent-chat-typing {
  align-self: flex-start;
  font-size: .8rem;
  color: var(--yan-muted, #64748b);
  padding: .2rem .4rem;
}

.agent-chat-approval {
  border: 1px solid #f59e0b;
  background: #fffbeb;
  border-radius: .6rem;
  padding: .7rem .8rem;
  display: flex;
  flex-direction: column;
  gap: .4rem;
}

.agent-chat-approval__head {
  display: flex;
  align-items: center;
  gap: .4rem;
  color: #92400e;
}

.agent-chat-approval__tool {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: .82rem;
  font-weight: 700;
}

.agent-chat-approval__reason {
  font-size: .84rem;
  line-height: 1.55;
}

.agent-chat-approval__args {
  margin: 0;
  max-height: 12rem;
  overflow: auto;
  background: rgba(15, 23, 42, .05);
  padding: .45rem .55rem;
  border-radius: .4rem;
  font-size: .72rem;
  white-space: pre-wrap;
  word-break: break-all;
}

.agent-chat-approval__actions {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
}

.agent-chat-composer {
  display: flex;
  flex-direction: column;
  gap: .4rem;
}

.agent-chat-composer__attachments {
  display: flex;
  flex-wrap: wrap;
  gap: .3rem;
}

.agent-chat-composer__row {
  display: flex;
  gap: .5rem;
  align-items: flex-end;
}

.agent-chat-composer__input {
  flex: 1 1 auto;
  min-height: 3.2rem;
  max-height: 12rem;
  resize: vertical;
}

.agent-chat-status {
  font-size: .8rem;
  color: var(--yan-muted, #64748b);
  min-height: 1.1rem;
}

.agent-chat-status--error {
  color: #b91c1c;
}

.agent-chat-hint {
  font-size: .74rem;
  color: var(--yan-muted, #64748b);
}

@media (max-width: 991.98px) {
  .agent-chat-card { min-height: 0; }
  .agent-chat-log { max-height: 52vh; }
  .agent-chat-session-list { max-height: 22vh; }
  .agent-chat-msg { max-width: 100%; }
}