/* =============================================
   GROUPED CHAT LAYOUT (Slack-style)
   ============================================= */

/* Chat Group Layout - default (assistant/other on left) */
.chat-group {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 16px;
  margin-left: 4px;
  margin-right: 16px;
}

/* User messages on right */
.chat-group.user {
  flex-direction: row-reverse;
  justify-content: flex-start;
}

.chat-group-messages {
  display: flex;
  flex-direction: column;
  gap: 2px;
  max-width: min(900px, calc(100% - 60px));
}

/* User messages align content right */
.chat-group.user .chat-group-messages {
  align-items: flex-end;
}

.chat-group.user .chat-group-footer {
  justify-content: flex-end;
}

/* Footer at bottom of message group (role + time) */
.chat-group-footer {
  display: flex;
  gap: 8px;
  align-items: baseline;
  margin-top: 6px;
}

.chat-sender-name {
  font-weight: 500;
  font-size: 12px;
  color: var(--muted);
}

.chat-group-timestamp {
  font-size: 11px;
  color: var(--muted);
  opacity: 0.7;
}

/* Chat divider (e.g., compaction marker) */
.chat-divider {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 18px 8px;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  user-select: none;
}

.chat-divider__line {
  flex: 1 1 0;
  height: 1px;
  background: var(--border);
  opacity: 0.9;
}

.chat-divider__label {
  padding: 2px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.02);
}

/* Avatar Styles */
.chat-avatar {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: var(--panel-strong);
  display: grid;
  place-items: center;
  font-weight: 600;
  font-size: 14px;
  flex-shrink: 0;
  align-self: flex-end; /* Align with last message in group */
  margin-bottom: 4px; /* Optical alignment */
}

.chat-avatar.user {
  background: var(--accent-subtle);
  color: var(--accent);
}

.chat-avatar.assistant {
  background: var(--secondary);
  color: var(--muted);
}

.chat-avatar.other {
  background: var(--secondary);
  color: var(--muted);
}

.chat-avatar.tool {
  background: var(--secondary);
  color: var(--muted);
}

/* Image avatar support */
img.chat-avatar {
  display: block;
  object-fit: cover;
  object-position: center;
}

/* Minimal Bubble Design - dynamic width based on content */
.chat-bubble {
  position: relative;
  display: inline-block;
  border: 1px solid transparent;
  background: var(--card);
  border-radius: var(--radius-lg);
  padding: 10px 14px;
  box-shadow: none;
  transition: background 150ms ease-out, border-color 150ms ease-out;
  max-width: 100%;
  word-wrap: break-word;
}

.chat-bubble.has-copy {
  padding-right: 36px;
}

.chat-copy-btn {
  position: absolute;
  top: 6px;
  right: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--muted);
  border-radius: var(--radius-md);
  padding: 4px 6px;
  font-size: 14px;
  line-height: 1;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 120ms ease-out, background 120ms ease-out;
}

.chat-copy-btn__icon {
  display: inline-flex;
  width: 14px;
  height: 14px;
  position: relative;
}

.chat-copy-btn__icon svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.5px;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.chat-copy-btn__icon-copy,
.chat-copy-btn__icon-check {
  position: absolute;
  top: 0;
  left: 0;
  transition: opacity 150ms ease;
}

.chat-copy-btn__icon-check {
  opacity: 0;
}

.chat-copy-btn[data-copied="1"] .chat-copy-btn__icon-copy {
  opacity: 0;
}

.chat-copy-btn[data-copied="1"] .chat-copy-btn__icon-check {
  opacity: 1;
}

.chat-bubble:hover .chat-copy-btn {
  opacity: 1;
  pointer-events: auto;
}

.chat-copy-btn:hover {
  background: var(--bg-hover);
}

.chat-copy-btn[data-copying="1"] {
  opacity: 0;
  pointer-events: none;
}

.chat-copy-btn[data-error="1"] {
  opacity: 1;
  pointer-events: auto;
  border-color: var(--danger-subtle);
  background: var(--danger-subtle);
  color: var(--danger);
}

.chat-copy-btn[data-copied="1"] {
  opacity: 1;
  pointer-events: auto;
  border-color: var(--ok-subtle);
  background: var(--ok-subtle);
  color: var(--ok);
}

.chat-copy-btn:focus-visible {
  opacity: 1;
  pointer-events: auto;
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

@media (hover: none) {
  .chat-copy-btn {
    opacity: 1;
    pointer-events: auto;
  }
}

/* Light mode: restore borders */
:root[data-theme="light"] .chat-bubble {
  border-color: var(--border);
  box-shadow: inset 0 1px 0 var(--card-highlight);
}

.chat-bubble:hover {
  background: var(--bg-hover);
}

/* User bubbles have different styling */
.chat-group.user .chat-bubble {
  background: var(--accent-subtle);
  border-color: transparent;
}

:root[data-theme="light"] .chat-group.user .chat-bubble {
  border-color: rgba(234, 88, 12, 0.2);
  background: rgba(251, 146, 60, 0.12);
}

.chat-group.user .chat-bubble:hover {
  background: rgba(255, 77, 77, 0.15);
}

/* Streaming animation */
.chat-bubble.streaming {
  animation: pulsing-border 1.5s ease-out infinite;
}

@keyframes pulsing-border {
  0%, 100% {
    border-color: var(--border);
  }
  50% {
    border-color: var(--accent);
  }
}

/* Fade-in animation for new messages */
.chat-bubble.fade-in {
  animation: fade-in 200ms ease-out;
}

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