/* SpiceBook Chat Widget — dark-only, floating panel */

.chat-fab {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 1000;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  border: 1px solid var(--color-sb-border);
  background: var(--color-sb-surface);
  color: var(--color-sb-accent);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, border-color 0.15s, transform 0.15s;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.chat-fab:hover {
  background: var(--color-sb-cell);
  border-color: var(--color-sb-accent);
  transform: scale(1.05);
}

.chat-fab.active {
  background: var(--color-sb-accent);
  color: var(--color-sb-text-bright);
  border-color: var(--color-sb-accent);
}

/* Panel */
.chat-panel {
  position: fixed;
  bottom: 5rem;
  right: 1.5rem;
  z-index: 1000;
  width: 24rem;
  max-height: 70vh;
  display: flex;
  flex-direction: column;
  background: var(--color-sb-bg);
  border: 1px solid var(--color-sb-border);
  border-radius: 0.75rem;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
  overflow: hidden;
  animation: chat-slide-up 0.2s ease-out;
}

@keyframes chat-slide-up {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Header */
.chat-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--color-sb-border);
  background: var(--color-sb-surface);
  flex-shrink: 0;
}

.chat-header-title {
  flex: 1;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-sb-text-bright);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.chat-header-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 0.375rem;
  border: none;
  background: transparent;
  color: var(--color-sb-muted);
  cursor: pointer;
  transition: background 0.1s, color 0.1s;
  flex-shrink: 0;
}

.chat-header-btn:hover {
  background: var(--color-sb-cell);
  color: var(--color-sb-text);
}

/* Messages */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
  min-height: 200px;
}

.chat-messages::-webkit-scrollbar {
  width: 4px;
}

.chat-messages::-webkit-scrollbar-thumb {
  background: var(--color-sb-border);
  border-radius: 2px;
}

.chat-bubble {
  max-width: 88%;
  padding: 0.5rem 0.75rem;
  border-radius: 0.75rem;
  font-size: 0.8125rem;
  line-height: 1.5;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.chat-bubble.user {
  align-self: flex-end;
  background: var(--color-sb-accent);
  color: white;
  border-bottom-right-radius: 0.25rem;
}

.chat-bubble.assistant {
  align-self: flex-start;
  background: var(--color-sb-cell);
  color: var(--color-sb-text);
  border-bottom-left-radius: 0.25rem;
}

.chat-bubble.assistant strong {
  color: var(--color-sb-text-bright);
}

.chat-bubble.assistant code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background: var(--color-sb-code-bg);
  padding: 0.0625rem 0.25rem;
  border-radius: 3px;
  color: #93c5fd;
}

.chat-bubble.assistant pre {
  background: var(--color-sb-code-bg);
  border: 1px solid var(--color-sb-border);
  border-radius: 0.375rem;
  padding: 0.5rem;
  margin: 0.375rem 0;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.chat-bubble.assistant pre code {
  background: transparent;
  padding: 0;
}

/* Markdown headings */
.chat-bubble.assistant h1,
.chat-bubble.assistant h2,
.chat-bubble.assistant h3,
.chat-bubble.assistant h4 {
  color: var(--color-sb-text-bright);
  font-weight: 600;
  margin: 0.75rem 0 0.25rem;
  line-height: 1.3;
}

.chat-bubble.assistant h1 { font-size: 1rem; }
.chat-bubble.assistant h2 { font-size: 0.9375rem; }
.chat-bubble.assistant h3 { font-size: 0.875rem; }
.chat-bubble.assistant h4 { font-size: 0.8125rem; }

.chat-bubble.assistant h1:first-child,
.chat-bubble.assistant h2:first-child,
.chat-bubble.assistant h3:first-child,
.chat-bubble.assistant h4:first-child {
  margin-top: 0;
}

/* Paragraphs */
.chat-bubble.assistant p {
  margin: 0.375rem 0;
}

.chat-bubble.assistant p:first-child {
  margin-top: 0;
}

.chat-bubble.assistant p:last-child {
  margin-bottom: 0;
}

/* Lists */
.chat-bubble.assistant ul,
.chat-bubble.assistant ol {
  margin: 0.375rem 0;
  padding-left: 1.25rem;
}

.chat-bubble.assistant li {
  margin: 0.125rem 0;
}

.chat-bubble.assistant li > ul,
.chat-bubble.assistant li > ol {
  margin: 0.125rem 0;
}

/* Horizontal rules */
.chat-bubble.assistant hr {
  border: none;
  border-top: 1px solid var(--color-sb-border);
  margin: 0.625rem 0;
}

/* Blockquotes */
.chat-bubble.assistant blockquote {
  border-left: 3px solid var(--color-sb-accent);
  margin: 0.5rem 0;
  padding: 0.375rem 0.625rem;
  background: rgba(59, 130, 246, 0.08);
  border-radius: 0 0.25rem 0.25rem 0;
  color: var(--color-sb-text);
}

.chat-bubble.assistant blockquote p {
  margin: 0.25rem 0;
}

/* Tables — wrapped in a scrollable container via overflow on the bubble */
.chat-bubble.assistant table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.5rem 0;
  font-size: 0.75rem;
  display: block;
  overflow-x: auto;
}

.chat-bubble.assistant th,
.chat-bubble.assistant td {
  padding: 0.3rem 0.5rem;
  border: 1px solid var(--color-sb-border);
  text-align: left;
}

.chat-bubble.assistant th {
  background: var(--color-sb-surface);
  color: var(--color-sb-text-bright);
  font-weight: 600;
}

.chat-bubble.assistant tr:nth-child(even) {
  background: rgba(255, 255, 255, 0.02);
}

/* Links */
.chat-bubble.assistant a {
  color: var(--color-sb-accent);
  text-decoration: none;
}

.chat-bubble.assistant a:hover {
  text-decoration: underline;
}

/* KaTeX math — dark theme overrides */
.chat-bubble.assistant .katex {
  font-size: 0.9em;
  color: var(--color-sb-text-bright);
}

.chat-bubble.assistant .katex-display {
  margin: 0.5rem 0;
  overflow-x: auto;
  overflow-y: hidden;
  padding: 0.375rem 0;
}

.chat-bubble.assistant .katex-display > .katex {
  white-space: normal;
}

/* Status messages */
.chat-status {
  text-align: center;
  font-size: 0.6875rem;
  color: var(--color-sb-muted);
  padding: 0.25rem 0;
  font-style: italic;
}

/* Reasoning (collapsed) */
.chat-reasoning {
  font-size: 0.6875rem;
  color: var(--color-sb-muted);
  margin-bottom: 0.25rem;
}

.chat-reasoning summary {
  cursor: pointer;
  color: var(--color-sb-muted);
  font-size: 0.6875rem;
}

.chat-reasoning summary:hover {
  color: var(--color-sb-text);
}

.chat-reasoning-body {
  margin-top: 0.25rem;
  padding: 0.375rem 0.5rem;
  background: var(--color-sb-surface);
  border-radius: 0.375rem;
  border: 1px solid var(--color-sb-border);
  max-height: 200px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

/* Streaming cursor */
.chat-cursor {
  display: inline-block;
  width: 2px;
  height: 1em;
  background: var(--color-sb-accent);
  animation: chat-blink 1s step-end infinite;
  vertical-align: text-bottom;
  margin-left: 1px;
}

@keyframes chat-blink {
  50% { opacity: 0; }
}

/* Input */
.chat-input-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 0.75rem;
  border-top: 1px solid var(--color-sb-border);
  background: var(--color-sb-surface);
  flex-shrink: 0;
}

.chat-input {
  flex: 1;
  background: var(--color-sb-bg);
  border: 1px solid var(--color-sb-border);
  border-radius: 0.5rem;
  padding: 0.5rem 0.75rem;
  font-size: 0.8125rem;
  color: var(--color-sb-text);
  outline: none;
  font-family: var(--font-sans);
  transition: border-color 0.15s;
}

.chat-input::placeholder {
  color: var(--color-sb-muted);
}

.chat-input:focus {
  border-color: var(--color-sb-accent);
}

.chat-send-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 0.5rem;
  border: none;
  background: var(--color-sb-accent);
  color: white;
  cursor: pointer;
  transition: background 0.15s;
  flex-shrink: 0;
}

.chat-send-btn:hover:not(:disabled) {
  background: var(--color-sb-accent-hover);
}

.chat-send-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* History view */
.chat-history-list {
  flex: 1;
  overflow-y: auto;
  padding: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-height: 200px;
}

.chat-history-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.625rem;
  border-radius: 0.5rem;
  cursor: pointer;
  transition: background 0.1s;
  border: none;
  background: transparent;
  color: var(--color-sb-text);
  text-align: left;
  font-size: 0.8125rem;
  width: 100%;
}

.chat-history-item:hover {
  background: var(--color-sb-cell);
}

.chat-history-item.active {
  background: var(--color-sb-cell);
  border: 1px solid var(--color-sb-border);
}

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

.chat-history-count {
  font-size: 0.6875rem;
  color: var(--color-sb-muted);
  flex-shrink: 0;
}

.chat-history-delete {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 0.25rem;
  border: none;
  background: transparent;
  color: var(--color-sb-muted);
  cursor: pointer;
  flex-shrink: 0;
  opacity: 0;
  transition: opacity 0.1s, color 0.1s;
}

.chat-history-item:hover .chat-history-delete {
  opacity: 1;
}

.chat-history-delete:hover {
  color: var(--color-sb-danger);
}

.chat-history-delete.confirm {
  color: var(--color-sb-danger);
  opacity: 1;
}

.chat-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  color: var(--color-sb-muted);
  font-size: 0.8125rem;
  font-style: italic;
}

/* Responsive: smaller screens */
@media (max-width: 480px) {
  .chat-panel {
    width: calc(100vw - 2rem);
    right: 1rem;
    bottom: 4.5rem;
    max-height: 60vh;
  }

  .chat-fab {
    bottom: 1rem;
    right: 1rem;
  }
}