/*
 * chat.css — Dockbox chat view redesign.
 * Uses design tokens from tokens.css exclusively (no hardcoded hex).
 * Load order: style.css → tokens.css → shell.css → chat.css
 *
 * BEM-flavoured: .chat__* for layout regions, .composer__* for composer sub-parts.
 * All existing app.js id/class hooks are preserved in index.html.
 */

/* ============================================================
   Split container — fills the view, flex row
   ============================================================ */

#view-chat.active {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
}

.chat-split-container {
  display: flex;
  flex-direction: row;
  height: 100%;
  min-height: 0;
  overflow: hidden;
}

.chat-split-left {
  flex: 1 1 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  position: relative;
}

/* ============================================================
   Header bar  (.chat__header)
   ============================================================ */

.chat__header {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  flex-shrink: 0;
  padding: var(--sp-2) var(--sp-4);
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
  min-height: 52px;
}

/* Session select */
.chat__session-select {
  max-width: 180px;
  padding: var(--sp-1) var(--sp-3);
  border: 1px solid var(--border);
  border-radius: var(--r-full);
  background: var(--bg-sunken);
  color: var(--text);
  font-family: var(--font);
  font-size: var(--fs-sm);
  font-weight: 500;
  cursor: pointer;
  outline: none;
  transition: border-color 0.15s;
  flex-shrink: 0;
}

.chat__session-select:focus {
  border-color: var(--accent);
}

/* Channel badges */
.chat__badges {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  flex-wrap: nowrap;
  overflow: hidden;
}

.session-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  padding: 2px var(--sp-2);
  background: var(--bg-sunken);
  border: 1px solid var(--border);
  border-radius: var(--r-full);
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--text-dim);
  white-space: nowrap;
  transition: opacity 0.15s;
  cursor: default;
}

.session-badge:hover { opacity: 0.8; }
.session-badge-name { color: var(--text); }

/* Idea controls */
.chat__idea-group {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  flex-shrink: 0;
}

.chat__idea-select {
  padding: 3px var(--sp-2);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--bg-sunken);
  color: var(--text);
  font-family: var(--font);
  font-size: var(--fs-xs);
  outline: none;
  cursor: pointer;
  max-width: 120px;
}

.chat__icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--bg-sunken);
  color: var(--text-dim);
  font-size: var(--fs-sm);
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  line-height: 1;
}

.chat__icon-btn:hover {
  background: var(--surface);
  color: var(--text);
}

.chat__icon-btn--danger:hover {
  background: var(--danger);
  color: var(--accent-contrast);
  border-color: var(--danger);
}

/* Spacer */
.chat__header-spacer { flex: 1; }

/* Right action group */
.chat__header-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  flex-shrink: 0;
}

/* ============================================================
   Message list  (.chat__messages / #chatMessages)
   ============================================================ */

.chat__messages {
  flex: 1 1 0;
  min-height: 0;
  overflow-y: auto;
  padding: var(--sp-5) var(--sp-5) var(--sp-4);
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  background: var(--bg);
  scroll-behavior: smooth;
}

/* Scrollbar */
.chat__messages::-webkit-scrollbar { width: 4px; }
.chat__messages::-webkit-scrollbar-track { background: transparent; }
.chat__messages::-webkit-scrollbar-thumb { background: var(--border); border-radius: var(--r-full); }

/* Empty state */
.chat__empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  flex: 1;
  color: var(--text-faint);
  text-align: center;
}

.chat__empty .empty-title {
  font-size: var(--fs-base);
  font-weight: 600;
  color: var(--text-dim);
  margin: 0;
}

.chat__empty .empty-desc {
  font-size: var(--fs-sm);
  color: var(--text-faint);
  margin: 0;
}

/* ============================================================
   Message bubbles  (.msg, .msg.sent, .msg.received)
   These classes are generated at runtime by app.js — we style
   them here, not rename them.
   ============================================================ */

.msg {
  max-width: 72%;
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--r-lg);
  font-size: var(--fs-sm);
  line-height: 1.6;
  word-break: break-word;
  box-shadow: var(--shadow-1);
  animation: msg-appear 0.15s ease;
}

@keyframes msg-appear {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Sent (user) — right-aligned, distinct indigo (not --accent, so it doesn't
   collide with the system selection-highlight blue when text inside is selected). */
.msg.sent {
  align-self: flex-end;
  background: var(--bubble-sent);
  color: #ffffff;
  border-bottom-right-radius: var(--r-sm);
}

.msg.sent .msg-meta {
  color: color-mix(in srgb, #ffffff 70%, transparent);
}

/* Received (assistant) — left-aligned, elevated surface */
.msg.received {
  align-self: flex-start;
  background: var(--bg-elev);
  color: var(--text);
  border: 1px solid var(--border);
  border-bottom-left-radius: var(--r-sm);
}

/* Model tint strips on received */
.msg.received.claude   { border-left: 3px solid var(--model-claude); }
.msg.received.ollama   { border-left: 3px solid var(--model-ollama); }
.msg.received.ipc      { border-left: 3px solid var(--model-ipc); }

/* Processing shimmer on the waiting sent message */
.msg.msg-processing {
  opacity: 0.7;
}

/* Message text area */
.msg-text {
  line-height: 1.65;
}

.msg-text p { margin: 0 0 var(--sp-2); }
.msg-text p:last-child { margin-bottom: 0; }

/* Meta row (sender, time, speak button) */
.msg-meta {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  margin-top: var(--sp-2);
  font-size: var(--fs-xs);
  color: var(--text-faint);
  flex-wrap: wrap;
}

/* Code blocks inside messages */
.msg-codeblock {
  position: relative;
  margin: var(--sp-2) 0;
  border-radius: var(--r-md);
  background: var(--bg-sunken);
  border: 1px solid var(--border);
  overflow: hidden;
}

.msg-codeblock code,
.msg-code {
  display: block;
  padding: var(--sp-3) var(--sp-4);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  line-height: 1.6;
  overflow-x: auto;
  color: var(--text);
  white-space: pre;
}

/* Tables inside messages */
.msg-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--sp-2) 0;
  font-size: var(--fs-xs);
}

.msg-table th {
  text-align: left;
  padding: var(--sp-1) var(--sp-3);
  font-weight: 600;
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  border-bottom: 2px solid var(--border);
  color: var(--text-dim);
  background: var(--bg-sunken);
}

.msg-table td {
  padding: var(--sp-1) var(--sp-3);
  border-bottom: 1px solid var(--border);
}

.msg-table tr:hover td { background: var(--bg-sunken); }

/* Collapsible thinking blocks */
.msg-thinking {
  margin: var(--sp-1) 0 var(--sp-2);
  border-left: 2px solid var(--text-faint);
  padding-left: var(--sp-2);
}

.msg-thinking summary {
  cursor: pointer;
  color: var(--text-faint);
  font-size: var(--fs-xs);
  font-style: italic;
  user-select: none;
}

.msg-thinking summary:hover { color: var(--text-dim); }

.msg-thinking-content {
  margin-top: var(--sp-1);
  color: var(--text-faint);
  font-size: var(--fs-xs);
  line-height: 1.5;
}

/* Speak button */
.msg-speak-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  padding: 0;
  border: none;
  border-radius: var(--r-full);
  background: transparent;
  cursor: pointer;
  opacity: 0.5;
  transition: opacity 0.15s;
  flex-shrink: 0;
}

.msg-speak-btn:hover { opacity: 1; }
.msg-speak-btn.speaking { opacity: 1; color: var(--accent); }
.msg-speak-btn svg { width: 12px; height: 12px; }

/* Inline file/image attachments */
.chat-img { max-width: 280px; border-radius: var(--r-md); margin-top: var(--sp-1); display: block; }
.chat-img-link { display: inline-block; }

.chat-file-link {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  padding: var(--sp-1) var(--sp-2);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--bg-sunken);
  color: var(--accent);
  font-size: var(--fs-xs);
  text-decoration: none;
  margin-top: var(--sp-1);
  transition: background 0.15s;
}

.chat-file-link:hover { background: var(--bg-elev); }

/* Bullet list helper */
.msg-bullet { margin-left: var(--sp-4); margin-bottom: var(--sp-1); list-style: disc; }

/* ============================================================
   Voice status bar  (.chat__voice-status / #voiceStatus)
   ============================================================ */

.chat__voice-status {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-1) var(--sp-4);
  background: var(--bg-elev);
  border-top: 1px solid var(--border);
  font-size: var(--fs-xs);
  color: var(--text-dim);
  flex-shrink: 0;
}

.chat__voice-status.hidden { display: none; }

/* ============================================================
   Thinking bar  (#thinkingBar / .thinking-bar)
   Dynamically inserted by app.js — we just clean up its style.
   ============================================================ */

.thinking-bar {
  display: flex;
  align-items: center;
  height: 28px;
  margin: 0 var(--sp-4) var(--sp-1);
  background: var(--bg-sunken);
  border: 1px solid var(--border);
  border-radius: var(--r-full);
  overflow-x: auto;
  overflow-y: hidden;
  flex-shrink: 0;
}

.thinking-bar::-webkit-scrollbar { display: none; }
.thinking-bar { scrollbar-width: none; }

.thinking-content {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-faint);
  white-space: nowrap;
  padding: 0 var(--sp-4);
}

/* ============================================================
   Typing indicator bar  (#typingIndicator / .typing-bar)
   Dynamically inserted by app.js before .chat-input-area.
   ============================================================ */

.typing-bar {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-2) var(--sp-4);
  background: var(--bg-elev);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.typing-bar.hidden { display: none; }

.typing-dots {
  display: flex;
  align-items: center;
  gap: 3px;
  flex-shrink: 0;
}

.typing-dots span {
  width: 6px;
  height: 6px;
  border-radius: var(--r-full);
  background: var(--accent);
  animation: typing-bounce 1.2s ease-in-out infinite;
}

.typing-dots span:nth-child(2) { animation-delay: 0.2s; }
.typing-dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing-bounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.5; }
  30%            { transform: translateY(-4px); opacity: 1; }
}

.typing-status {
  flex: 1;
  font-size: var(--fs-xs);
  color: var(--text-dim);
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.typing-stop-btn {
  display: inline-flex;
  align-items: center;
  padding: 4px var(--sp-3);
  border: 1px solid var(--danger);
  border-radius: var(--r-full);
  background: transparent;
  color: var(--danger);
  font-family: var(--font);
  font-size: var(--fs-xs);
  font-weight: 600;
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.15s, color 0.15s;
}

.typing-stop-btn:hover {
  background: var(--danger);
  color: var(--accent-contrast);
}

/* ============================================================
   Composer  (.chat-input-area / .chat__composer)
   ============================================================ */

.chat__composer {
  display: flex;
  flex-direction: column;
  gap: 0;
  flex-shrink: 0;
  background: var(--bg-elev);
  border-top: 1px solid var(--border);
  padding: var(--sp-2) var(--sp-4) var(--sp-3);
  position: relative;
}

/* Tool row */
.composer__tools {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  margin-bottom: var(--sp-2);
}

/* Small icon-style tool buttons (attach, voice) */
.composer__tool-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--bg-sunken);
  color: var(--text-dim);
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.composer__tool-btn:hover {
  background: var(--surface);
  color: var(--text);
  border-color: var(--accent);
}

.composer__tool-btn svg { width: 16px; height: 16px; }

/* Model select */
.composer__model-select {
  padding: 4px var(--sp-3);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--bg-sunken);
  color: var(--text);
  font-family: var(--font);
  font-size: var(--fs-xs);
  font-weight: 500;
  cursor: pointer;
  outline: none;
  transition: border-color 0.15s;
  max-width: 140px;
}

.composer__model-select:focus { border-color: var(--accent); }

/* Trigger toggle label */
.composer__trigger-label {
  font-size: var(--fs-xs);
  color: var(--text-dim);
}

/* Input row */
.composer__input-row {
  display: flex;
  align-items: flex-end;
  gap: var(--sp-2);
}

/* Textarea */
.chat__composer textarea,
.composer__input-row textarea {
  flex: 1;
  min-height: 40px;
  max-height: 200px;
  padding: var(--sp-2) var(--sp-3);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--bg-sunken);
  color: var(--text);
  font-family: var(--font);
  font-size: var(--fs-sm);
  line-height: 1.5;
  resize: none;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
  box-sizing: border-box;
}

.chat__composer textarea:focus,
.composer__input-row textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 15%, transparent);
}

.chat__composer textarea::placeholder,
.composer__input-row textarea::placeholder {
  color: var(--text-faint);
}

/* Send button */
.composer__send {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: none;
  border-radius: var(--r-md);
  background: var(--accent);
  color: var(--accent-contrast);
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.15s, transform 0.1s;
}

.composer__send:hover { background: var(--accent-hover); }
.composer__send:active { transform: scale(0.95); }
.composer__send svg { width: 16px; height: 16px; }

/* Voice button states */
.voice-btn.recording {
  background: var(--danger) !important;
  border-color: var(--danger) !important;
  color: var(--accent-contrast) !important;
}

.voice-btn.processing {
  background: var(--model-claude) !important;
  border-color: var(--model-claude) !important;
  color: var(--accent-contrast) !important;
  animation: voice-pulse 1s ease-in-out infinite;
}

@keyframes voice-pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.6; }
}

/* ============================================================
   Drop overlay  (#chatDropOverlay)
   ============================================================ */

#chatDropOverlay {
  position: absolute;
  inset: 0;
  z-index: var(--z-overlay);
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px dashed var(--accent);
  border-radius: var(--r-lg);
}

#chatDropOverlay.hidden { display: none; }

.drop-overlay-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-3);
  color: var(--accent);
  font-size: var(--fs-base);
  font-weight: 600;
}

.drop-overlay-content svg {
  opacity: 0.7;
  stroke: var(--accent);
}

/* ============================================================
   Split handle + right pane
   ============================================================ */

.chat-split-handle {
  width: 4px;
  background: var(--border);
  cursor: col-resize;
  flex-shrink: 0;
  transition: background 0.15s;
}

.chat-split-handle:hover,
.chat-split-handle.dragging {
  background: var(--accent);
}

.chat-split-handle.hidden { display: none; }

.chat-split-right {
  display: flex;
  flex-direction: column;
  width: 40%;
  min-width: 300px;
  background: var(--bg-elev);
  border-left: 1px solid var(--border);
  overflow: hidden;
}

.chat-split-right.hidden { display: none; }

/* Pane header */
.pane-header {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  padding: var(--sp-2) var(--sp-3);
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.pane-tab {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  padding: 5px var(--sp-3);
  border: 1px solid transparent;
  border-radius: var(--r-md);
  background: transparent;
  color: var(--text-dim);
  font-family: var(--font);
  font-size: var(--fs-xs);
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.pane-tab:hover { background: var(--bg-sunken); color: var(--text); }

.pane-tab.active {
  background: var(--bg-sunken);
  color: var(--text);
  border-color: var(--border);
}

.pane-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  padding: 0;
  border: none;
  border-radius: var(--r-sm);
  background: transparent;
  color: var(--text-faint);
  font-size: var(--fs-base);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.pane-close:hover { background: var(--bg-sunken); color: var(--text); }

/* Pane body */
.pane-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  min-height: 0;
}

.pane-body.hidden { display: none; }

.pane-status {
  padding: var(--sp-4);
  font-size: var(--fs-sm);
  color: var(--text-faint);
  text-align: center;
}

.pane-body iframe {
  flex: 1;
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

/* Terminal lock overlay */
.terminal-lock-overlay {
  position: absolute;
  inset: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg-elev) 88%, transparent);
  backdrop-filter: blur(2px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.terminal-lock-overlay.hidden { display: none; }

.lock-message {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-4);
  background: var(--bg-sunken);
  border: 1px solid var(--border);
  border-radius: var(--r-full);
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--text-dim);
}

/* Suppress pointer events on iframes during resize drag */
.chat-split-container.resizing iframe { pointer-events: none; }

/* ============================================================
   Responsive — narrow screens
   ============================================================ */

@media (max-width: 768px) {
  .chat__header {
    padding: var(--sp-2);
    gap: var(--sp-1);
    flex-wrap: wrap;
  }

  .chat__session-select { max-width: 130px; }

  .chat__header-actions { gap: var(--sp-1); }

  .chat__messages {
    padding: var(--sp-3) var(--sp-3) var(--sp-3);
  }

  .msg { max-width: 88%; }

  .chat__composer { padding: var(--sp-2) var(--sp-3); }

  .thinking-bar { margin: 0 var(--sp-3) var(--sp-1); }
}

/* Optimistic send states */
.msg.msg-pending { opacity: .6; }
.msg.msg-pending .msg-pending-label { font-style: italic; }
.msg.msg-failed { opacity: .9; box-shadow: 0 0 0 1px var(--danger); }
.msg-failed-label { color: var(--danger); font-weight: 600; }
.msg-retry-btn {
  background: none;
  border: 1px solid currentColor;
  border-radius: var(--r-full);
  color: inherit;
  cursor: pointer;
  font-size: var(--fs-xs);
  margin-left: var(--sp-1);
  padding: 1px 8px;
  transition: opacity var(--transition-fast, .15s ease);
}
.msg-retry-btn:hover { opacity: .8; }