/* ── Messages area ── */
.messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

/* ── Chat popover ── */
.chat-popover {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  width: 260px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  z-index: 100;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
  overflow: hidden;
}

.chat-popover.open { display: block; }

.popover-section {
  padding: 8px;
  border-bottom: 1px solid var(--border);
}

.popover-section:last-child { border-bottom: none; }

.popover-label {
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  padding: 4px 4px 6px;
}

#chat-list {
  max-height: 260px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.chat-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 8px;
  border-radius: 3px;
  cursor: pointer;
  font-size: 12px;
  color: var(--text-muted);
  transition: background 0.1s;
}

.chat-item:hover {
  background: var(--border);
  color: var(--text);
}

.chat-item.active-chat { color: var(--green-dim); }

.chat-item-title {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.chat-item-del {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 11px;
  padding: 1px 4px;
  border-radius: 2px;
  flex-shrink: 0;
  opacity: 0;
  transition: opacity 0.1s, color 0.1s;
}

.chat-item:hover .chat-item-del { opacity: 1; }

.chat-item-del:hover { color: #cc3333; }

.popover-btn {
  width: 100%;
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: 'Courier New', Courier, monospace;
  font-size: 12px;
  text-align: left;
  padding: 5px 8px;
  border-radius: 3px;
  cursor: pointer;
  transition: background 0.1s, color 0.1s;
}

.popover-btn:hover {
  background: var(--border);
  color: var(--text);
}

.popover-btn.danger:hover { color: #cc3333; }

/* ── System banner ── */
.system-banner {
  text-align: center;
  padding: 20px 0 12px;
  border-bottom: 1px solid var(--border);
}

.system-banner-title {
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--green-dim);
  margin-bottom: 6px;
}

.system-banner-body {
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  line-height: 1.7;
}

.sys-action-btn {
  display: inline-block;
  width: auto;
  margin-top: 8px;
  margin-bottom: 2px;
  font-size: 11px;
  color: var(--green-dim);
  background: none;
  font-family: 'Courier New', Courier, monospace;
  padding: 5px 10px;
  border: 1px solid var(--green-dim);
  border-radius: 3px;
  line-height: 1;
  cursor: pointer;
  transition: background 0.12s, color 0.12s;
}

.sys-action-btn:hover {
  background: var(--green-dark);
  color: var(--green);
}

/* ── Message bubbles ── */
.msg {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-width: 85%;
}

.msg-label {
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

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

.msg-user .msg-label { color: var(--green-dim); }

.msg-ai { align-self: flex-start; }

.msg-actions {
  display: flex;
  gap: 2px;
  justify-content: flex-end;
  margin-top: 6px;
}

.msg-ai .msg-actions { justify-content: flex-start; }

.msg-user .bubble {
  background: var(--green-dark);
  border: 1px solid var(--green-dim);
  color: var(--green);
}

.msg-ai .bubble {
  background: var(--surface);
  border: 1px solid var(--border);
}

.bubble {
  font-size: 14px;
  line-height: 1.65;
  padding: 10px 14px;
  border-radius: 4px;
  color: var(--text);
}

.bubble-text { word-break: break-word; }

.msg-user .bubble-text { white-space: pre-wrap; }

.action-btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 4px;
  color: var(--text-muted);
  line-height: 1;
  display: flex;
  align-items: center;
  transition: background 0.12s, color 0.12s, opacity 0.12s;
}

.action-btn:disabled {
  opacity: 0.3;
  cursor: default;
  pointer-events: none;
}

.action-btn:hover {
  background: var(--border);
  color: var(--text);
}

.action-btn.del:hover { color: #cc3333; }

.action-btn.regen:hover { color: var(--green-dim); }

.compact-msg .bubble-text {
  font-style: italic;
  color: var(--text-muted);
}

.compact-msg .msg-label { opacity: 0.5; }

/* ── Thinking animation ── */
.thinking-msg {
  color: var(--text-muted);
  font-style: italic;
  font-size: 13px;
  animation: fadeloop 1.8s ease-in-out infinite;
}

@keyframes fadeloop {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

/* ── Markdown rendered elements ── */
.bubble table {
  border-collapse: collapse;
  margin: 8px 0;
  font-size: 13px;
  width: 100%;
}

.bubble th,
.bubble td {
  border: 1px solid var(--border);
  padding: 5px 10px;
  text-align: left;
}

.bubble th {
  background: #111811;
  color: var(--green-dim);
}

.bubble tr:nth-child(even) td { background: rgba(0, 0, 0, 0.15); }

.bubble pre {
  background: #070b07;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 10px 10px;
  overflow-x: auto;
  margin: 8px 0;
}

.bubble pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 12px;
}

.bubble code {
  font-family: 'Courier New', Courier, monospace;
  font-size: 12px;
  background: #111811;
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 2px 5px;
}

.bubble ul,
.bubble ol {
  padding-left: 22px;
  margin: 4px 0;
}

.bubble li { margin: 2px 0; }

.bubble h1 {
  margin: 12px 0 6px;
  color: var(--green-dim);
  font-size: 16px;
  letter-spacing: 0.06em;
}

.bubble h2 {
  margin: 10px 0 5px;
  color: var(--green-dim);
  font-size: 15px;
  letter-spacing: 0.05em;
}

.bubble h3 {
  margin: 8px 0 4px;
  color: var(--green-dim);
  font-size: 14px;
  letter-spacing: 0.04em;
}

.bubble p { margin: 4px 0; }

.bubble blockquote {
  border-left: 3px solid var(--green-dark);
  margin: 6px 0;
  padding: 4px 12px;
  color: var(--text-muted);
  background: rgba(0, 255, 65, 0.03);
  border-radius: 0 3px 3px 0;
}

.bubble input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 12px;
  height: 12px;
  border: 1px solid var(--green-dark);
  background: var(--bg);
  border-radius: 2px;
  margin-right: 6px;
  vertical-align: middle;
  position: relative;
  top: -1px;
  cursor: default;
  flex-shrink: 0;
}

.bubble input[type="checkbox"]:checked {
  background: var(--green-dark);
  border-color: var(--green-dim);
}

.bubble input[type="checkbox"]:checked::after {
  content: '✓';
  position: absolute;
  top: 0;
  left: 1px;
  font-size: 10px;
  color: var(--green-dim);
  line-height: 1;
}