/* akong-chat-bubble · Web 样式 · 用 var(--ak-*) 接 @akong/tokens */

/* === Row 容器 (avatar + bubble + 时间 同一行) === */
.ak-chat-bubble-row {
  display: flex;
  width: 100%;
  margin: var(--ak-space-2) 0;
  font-family: var(--ak-font-sans);
  -webkit-font-smoothing: antialiased;
}

.ak-chat-bubble-row--user {
  justify-content: flex-end;
}

.ak-chat-bubble-row--assistant {
  justify-content: flex-start;
  gap: var(--ak-space-2);
}

.ak-chat-bubble-row--system {
  justify-content: center;
  flex-direction: column;
  align-items: center;
}

/* === assistant avatar slot === */
.ak-chat-bubble__avatar-slot {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  align-self: flex-end; /* 头像贴气泡底 · iMessage 风 */
  margin-bottom: 18px;  /* 跟 meta 行齐 */
}

.ak-chat-bubble__avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--ak-radius-full);
  object-fit: cover;
  display: block;
}

.ak-chat-bubble__avatar--placeholder {
  background: var(--ak-bg-subtle);
}

/* === main 列 (气泡 + meta) === */
.ak-chat-bubble__main {
  display: flex;
  flex-direction: column;
  max-width: 80%;
  min-width: 0;
}

.ak-chat-bubble-row--user .ak-chat-bubble__main {
  align-items: flex-end;
}

.ak-chat-bubble-row--assistant .ak-chat-bubble__main {
  align-items: flex-start;
}

/* === Bubble 本体 === */
.ak-chat-bubble {
  position: relative;
  padding: var(--ak-space-2) var(--ak-space-3);
  border-radius: var(--ak-radius-2xl);
  font-size: var(--ak-text-base);
  line-height: var(--ak-leading-snug, 1.35);
  letter-spacing: var(--ak-tracking-normal, 0);
  cursor: pointer;
  user-select: text;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  outline: none;
  word-break: break-word;
  overflow-wrap: anywhere;
  transition: opacity var(--ak-duration-fast) var(--ak-ease-out);
}

.ak-chat-bubble:focus-visible {
  outline: 2px solid var(--ak-border-strong);
  outline-offset: 2px;
}

.ak-chat-bubble:active {
  opacity: 0.85;
}

/* user 右下角 sm tail */
.ak-chat-bubble--user {
  background: var(--ak-fg);
  color: var(--ak-fg-inverse);
  border-bottom-right-radius: var(--ak-radius-sm);
}

/* assistant 左下角 sm tail */
.ak-chat-bubble--assistant {
  background: var(--ak-bg-subtle);
  color: var(--ak-fg);
  border-bottom-left-radius: var(--ak-radius-sm);
}

/* system 居中灰小字 · 无气泡 */
.ak-chat-bubble--system {
  display: inline-block;
  padding: var(--ak-space-1) var(--ak-space-3);
  font-size: var(--ak-text-xs);
  color: var(--ak-fg-subtle);
  text-align: center;
  background: transparent;
  user-select: text;
}

.ak-chat-bubble__system-name {
  font-weight: var(--ak-weight-medium);
  color: var(--ak-fg-muted);
}

/* === text variant === */
.ak-chat-bubble__text {
  display: block;
  white-space: pre-line;
}

/* === image variant · 嵌气泡内 · 占满去 padding === */
.ak-chat-bubble--image {
  padding: 0;
  overflow: hidden;
  background: transparent;
}

.ak-chat-bubble--image.ak-chat-bubble--user {
  background: transparent;
}

.ak-chat-bubble__image {
  display: block;
  max-width: 240px;
  max-height: 320px;
  width: auto;
  height: auto;
  border-radius: var(--ak-radius-2xl);
  object-fit: cover;
}

.ak-chat-bubble--user .ak-chat-bubble__image {
  border-bottom-right-radius: var(--ak-radius-sm);
}

.ak-chat-bubble--assistant .ak-chat-bubble__image {
  border-bottom-left-radius: var(--ak-radius-sm);
}

/* === file variant === */
.ak-chat-bubble__file {
  display: flex;
  align-items: center;
  gap: var(--ak-space-2);
  min-width: 160px;
}

.ak-chat-bubble__file-icon {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
}

.ak-chat-bubble__file-meta {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.ak-chat-bubble__file-name {
  font-size: var(--ak-text-sm);
  font-weight: var(--ak-weight-medium);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ak-chat-bubble__file-size {
  font-size: var(--ak-text-xs);
  opacity: 0.7;
}

/* === voice variant === */
.ak-chat-bubble__voice {
  display: flex;
  align-items: center;
  gap: var(--ak-space-2);
  min-width: 80px;
}

.ak-chat-bubble__voice-icon {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
}

.ak-chat-bubble__voice-duration {
  font-size: var(--ak-text-sm);
  font-variant-numeric: tabular-nums;
}

/* === meta 行 (status + time) === */
.ak-chat-bubble__meta {
  display: flex;
  align-items: center;
  gap: var(--ak-space-1);
  margin-top: var(--ak-space-1);
  font-size: var(--ak-text-xs);
  color: var(--ak-fg-subtle);
  min-height: 14px;
}

.ak-chat-bubble-row--user .ak-chat-bubble__meta {
  flex-direction: row-reverse;
}

.ak-chat-bubble__time {
  font-size: var(--ak-text-xs);
  color: var(--ak-fg-subtle);
  font-variant-numeric: tabular-nums;
}

.ak-chat-bubble__time--system {
  margin-top: var(--ak-space-1);
}

/* === status icon === */
.ak-chat-bubble__status {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 14px;
  height: 14px;
}

.ak-chat-bubble__status--failed {
  color: var(--ak-accent);
}

.ak-chat-bubble__status--sending {
  color: var(--ak-fg-subtle);
}

.ak-chat-bubble__spinner {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 1.5px solid currentColor;
  border-top-color: transparent;
  animation: ak-chat-bubble-spin 0.7s linear infinite;
}

@keyframes ak-chat-bubble-spin {
  to { transform: rotate(360deg); }
}