/* Chat Page */
.chat-container {
  display: flex;
  height: calc(100vh - 52px);
  overflow: hidden;
}

/* ── Sidebar ── */
.chat-sidebar {
  width: 260px;
  border-right: 1px solid var(--tv-border);
  display: flex;
  flex-direction: column;
  background: var(--tv-bg);
}

.chat-sidebar-header {
  padding: 12px;
  border-bottom: 1px solid var(--tv-border);
  display: flex;
  gap: 8px;
}

.chat-new-btn {
  flex: 1;
  padding: 8px 12px;
  background: var(--tv-accent);
  color: #fff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: opacity 0.15s;
}
.chat-new-btn:hover { opacity: 0.85; }

.chat-conv-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}

.chat-conv-item {
  display: flex;
  align-items: center;
  padding: 10px 12px;
  border-radius: 6px;
  cursor: pointer;
  gap: 8px;
  margin-bottom: 2px;
  transition: background 0.1s;
}
.chat-conv-item:hover { background: var(--tv-bg-secondary); }
.chat-conv-item.active { background: var(--tv-bg-secondary); }

.chat-conv-info {
  flex: 1;
  min-width: 0;
}

.chat-conv-title {
  font-size: 13px;
  font-weight: 500;
  color: var(--tv-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chat-conv-meta {
  font-size: 11px;
  color: var(--tv-text-secondary);
  margin-top: 2px;
}

.chat-conv-delete {
  opacity: 0;
  background: none;
  border: none;
  color: var(--tv-text-secondary);
  cursor: pointer;
  padding: 4px;
  font-size: 12px;
  border-radius: 4px;
  transition: opacity 0.1s, color 0.1s;
}
.chat-conv-item:hover .chat-conv-delete { opacity: 1; }
.chat-conv-delete:hover { color: #ef4444; }

/* ── Main Chat Area ── */
.chat-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--tv-bg);
  position: relative;
}

/* ── Copy message button ── */
.chat-msg-copy {
  opacity: 0;
  background: var(--tv-bg-secondary);
  border: 1px solid var(--tv-border);
  color: var(--tv-text-secondary);
  cursor: pointer;
  padding: 5px 10px;
  border-radius: 6px;
  font-size: 12px;
  margin-top: 4px;
  transition: opacity 0.15s, color 0.15s, background 0.15s;
}
.chat-msg:hover .chat-msg-copy { opacity: 0.7; }
.chat-msg-copy:hover { opacity: 1 !important; color: var(--tv-text-primary); background: var(--tv-bg); }

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* ── Empty State ── */
.chat-empty {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--tv-text-secondary);
  gap: 12px;
  padding: 40px;
}
.chat-empty-icon {
  font-size: 48px;
  opacity: 0.3;
}
.chat-empty-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--tv-text-primary);
}
.chat-empty-subtitle {
  font-size: 13px;
  text-align: center;
  max-width: 360px;
  line-height: 1.5;
}

/* ── Messages ── */
.chat-msg {
  display: flex;
  gap: 12px;
  max-width: 85%;
  animation: chatFadeIn 0.2s ease;
}
@keyframes chatFadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.chat-msg.user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.chat-msg-avatar {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  flex-shrink: 0;
  margin-top: 2px;
}
.chat-msg.user .chat-msg-avatar {
  background: var(--tv-accent);
  color: #fff;
}
.chat-msg.assistant .chat-msg-avatar {
  background: var(--tv-bg-secondary);
  color: var(--tv-text-primary);
  border: 1px solid var(--tv-border);
}

.chat-msg-body {
  min-width: 0;
}

.chat-msg-content {
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 13.5px;
  line-height: 1.6;
  word-wrap: break-word;
  position: relative;
}

/* Collapsed state for long messages */
.chat-msg-content.collapsed {
  max-height: 300px;
  overflow: hidden;
}
.chat-msg-content.collapsed::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60px;
  pointer-events: none;
}
.chat-msg.assistant .chat-msg-content.collapsed::after {
  background: linear-gradient(transparent, var(--tv-bg-secondary));
}
.chat-msg.user .chat-msg-content.collapsed::after {
  background: linear-gradient(transparent, var(--tv-accent));
}

.chat-msg-toggle {
  display: block;
  background: none;
  border: none;
  color: var(--tv-accent);
  cursor: pointer;
  font-size: 12px;
  font-weight: 500;
  padding: 4px 0;
  margin-top: 2px;
  transition: opacity 0.15s;
}
.chat-msg-toggle:hover { opacity: 0.75; }
.chat-msg.user .chat-msg-toggle { color: rgba(255,255,255,0.8); }

.chat-msg.user .chat-msg-content {
  background: var(--tv-accent);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.chat-msg.assistant .chat-msg-content {
  background: var(--tv-bg-secondary);
  color: var(--tv-text-primary);
  border: 1px solid var(--tv-border);
  border-bottom-left-radius: 4px;
}

/* Markdown inside assistant messages */
.chat-msg.assistant .chat-msg-content h2,
.chat-msg.assistant .chat-msg-content h3 {
  margin: 12px 0 6px;
  font-size: 14px;
  font-weight: 600;
}
.chat-msg.assistant .chat-msg-content h2:first-child,
.chat-msg.assistant .chat-msg-content h3:first-child {
  margin-top: 0;
}

.chat-msg.assistant .chat-msg-content p {
  margin: 6px 0;
}
.chat-msg.assistant .chat-msg-content p:first-child { margin-top: 0; }
.chat-msg.assistant .chat-msg-content p:last-child { margin-bottom: 0; }

.chat-msg.assistant .chat-msg-content ul,
.chat-msg.assistant .chat-msg-content ol {
  margin: 6px 0;
  padding-left: 20px;
}
.chat-msg.assistant .chat-msg-content li { margin: 3px 0; }

.chat-msg.assistant .chat-msg-content code {
  background: var(--tv-bg);
  padding: 2px 5px;
  border-radius: 3px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
}

.chat-msg.assistant .chat-msg-content pre {
  background: var(--tv-bg);
  border: 1px solid var(--tv-border);
  border-radius: 6px;
  padding: 10px 12px;
  overflow-x: auto;
  margin: 8px 0;
}
.chat-msg.assistant .chat-msg-content pre code {
  background: none;
  padding: 0;
  font-size: 12px;
  line-height: 1.5;
}

.chat-msg.assistant .chat-msg-content table {
  border-collapse: collapse;
  margin: 8px 0;
  font-size: 12px;
  width: 100%;
}
.chat-msg.assistant .chat-msg-content th,
.chat-msg.assistant .chat-msg-content td {
  border: 1px solid var(--tv-border);
  padding: 5px 8px;
  text-align: left;
}
.chat-msg.assistant .chat-msg-content th {
  background: var(--tv-bg);
  font-weight: 600;
}

.chat-msg.assistant .chat-msg-content strong {
  font-weight: 600;
}

/* ── Tool Badges ── */
.chat-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 6px;
}

.chat-tool-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  background: var(--tv-bg);
  border: 1px solid var(--tv-border);
  border-radius: 20px;
  font-size: 11px;
  color: var(--tv-text-secondary);
  font-family: 'JetBrains Mono', monospace;
}
.chat-tool-badge.complete {
  border-color: var(--tv-accent);
  color: var(--tv-accent);
}

.chat-tool-spinner {
  width: 10px;
  height: 10px;
  border: 2px solid var(--tv-border);
  border-top-color: var(--tv-accent);
  border-radius: 50%;
  animation: chatSpin 0.6s linear infinite;
}
@keyframes chatSpin {
  to { transform: rotate(360deg); }
}

/* ── Typing Indicator ── */
.chat-typing {
  display: flex;
  gap: 4px;
  padding: 12px 14px;
}
.chat-typing-dot {
  width: 6px;
  height: 6px;
  background: var(--tv-text-secondary);
  border-radius: 50%;
  animation: chatBounce 1.2s infinite;
}
.chat-typing-dot:nth-child(2) { animation-delay: 0.15s; }
.chat-typing-dot:nth-child(3) { animation-delay: 0.3s; }
@keyframes chatBounce {
  0%, 60%, 100% { transform: translateY(0); }
  30% { transform: translateY(-4px); }
}

/* ── Input Area ── */
.chat-input-area {
  padding: 12px 24px 16px;
  border-top: 1px solid var(--tv-border);
  background: var(--tv-bg);
}

.chat-input-footer {
  display: flex;
  align-items: center;
  margin-top: 8px;
  position: relative;
}

/* ── Model selector button ── */
.chat-model-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--tv-text-secondary);
  font-size: 12px;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.chat-model-btn:hover {
  background: var(--tv-bg-secondary);
  color: var(--tv-text-primary);
}
.chat-model-btn-name {
  font-weight: 500;
}
.chat-model-btn-badge {
  font-size: 11px;
  color: #6b8afd;
  font-weight: 500;
}

/* ── Model dropdown menu ── */
.chat-model-menu {
  display: none;
  position: absolute;
  bottom: calc(100% + 6px);
  left: 0;
  min-width: 260px;
  background: var(--tv-bg-secondary);
  border: 1px solid var(--tv-border);
  border-radius: 14px;
  padding: 6px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
  z-index: 100;
}
.chat-model-menu.open { display: block; }

.chat-model-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.12s;
}
.chat-model-option:hover {
  background: rgba(255,255,255,0.05);
}

.chat-model-option-info { flex: 1; }
.chat-model-option-name {
  font-size: 14px;
  font-weight: 500;
  color: var(--tv-text-primary);
}
.chat-model-option-desc {
  font-size: 12px;
  color: var(--tv-text-secondary);
  margin-top: 2px;
}

.chat-model-check {
  color: #6b8afd;
  font-size: 14px;
  margin-left: 12px;
}
.chat-model-option:not(.active) .chat-model-check {
  display: none;
}

.chat-model-divider {
  height: 1px;
  background: var(--tv-border);
  margin: 4px 12px;
}

/* ── Smart toggle switch (Claude-style) ── */
.chat-smart-switch {
  position: relative;
  display: inline-block;
  width: 42px;
  height: 24px;
  flex-shrink: 0;
  margin-left: 12px;
  cursor: pointer;
}
.chat-smart-switch input { display: none; }

.chat-smart-track {
  position: absolute;
  inset: 0;
  background: var(--tv-border);
  border-radius: 12px;
  transition: background 0.2s;
}
.chat-smart-track::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  background: #888;
  border-radius: 50%;
  transition: transform 0.2s, background 0.2s;
}
.chat-smart-switch input:checked + .chat-smart-track {
  background: #6b8afd;
}
.chat-smart-switch input:checked + .chat-smart-track::after {
  transform: translateX(18px);
  background: #fff;
}

.chat-input-row {
  display: flex;
  gap: 8px;
  align-items: flex-end;
}

.chat-textarea {
  flex: 1;
  resize: none;
  border: 1px solid var(--tv-border);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 13.5px;
  font-family: inherit;
  background: var(--tv-bg-secondary);
  color: var(--tv-text-primary);
  outline: none;
  max-height: 160px;
  min-height: 40px;
  line-height: 1.5;
  transition: border-color 0.15s;
}
.chat-textarea:focus {
  border-color: var(--tv-accent);
}
.chat-textarea::placeholder {
  color: var(--tv-text-secondary);
}

.chat-send-btn {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: none;
  background: var(--tv-accent);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
  transition: opacity 0.15s;
}
.chat-send-btn:hover { opacity: 0.85; }
.chat-send-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.chat-stop-btn {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid #ef4444;
  background: transparent;
  color: #ef4444;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
}
.chat-stop-btn:hover { background: rgba(239, 68, 68, 0.1); }

.chat-input-hint {
  font-size: 11px;
  color: var(--tv-text-secondary);
  margin-left: auto;
}

/* ── Mobile toggle ── */
.chat-sidebar-toggle {
  display: none;
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--tv-bg-secondary);
  border: 1px solid var(--tv-border);
  color: var(--tv-text-primary);
  padding: 6px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  z-index: 10;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .chat-sidebar {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: 20;
    transform: translateX(-100%);
    transition: transform 0.2s ease;
    box-shadow: 2px 0 12px rgba(0,0,0,0.15);
  }
  .chat-sidebar.open {
    transform: translateX(0);
  }
  .chat-sidebar-toggle {
    display: flex;
  }
  .chat-container {
    position: relative;
  }
  .chat-msg {
    max-width: 95%;
  }
  .chat-messages {
    padding: 16px 12px;
  }
  .chat-msg-copy {
    opacity: 0.5;
  }
  .chat-input-area {
    padding: 10px 12px 14px;
  }
}