/* A writing dock extending the workbench's existing graphite palette. */
.canvas-page .canvas-workbench { --canvas-chat-width: clamp(340px, 28vw, 440px); }
.canvas-page .canvas-workbench.has-chat-panel > .canvas-stage-wrap { width: calc(100% - var(--canvas-chat-width)); }
.canvas-chat-panel {
  position: absolute; top: 0; right: 0; bottom: 0; z-index: 80;
  width: var(--canvas-chat-width); display: flex; flex-direction: column;
  background: var(--canvas-bg-deep); color: var(--canvas-text);
  border-left: 1px solid var(--canvas-border); font-size: 13px; cursor: default;
}
.canvas-chat-panel[hidden], #canvasChatRoot [hidden] { display: none !important; }
#canvasChatRoot button, #canvasChatRoot textarea, #canvasChatRoot select { font: inherit; }
#canvasChatRoot button { cursor: pointer; }
#canvasChatRoot button:disabled { opacity: .45; cursor: not-allowed; }
#canvasChatRoot :is(button, textarea, select):focus-visible { outline: 2px solid var(--canvas-text-muted); outline-offset: 3px; }
.canvas-chat-head { display: flex; align-items: center; gap: 8px; padding: 20px; border-bottom: 1px solid var(--canvas-border); }
.canvas-chat-head > div { flex: 1; }
.canvas-chat-head h2 { font-size: 15px; font-weight: 600; margin: 0 0 5px; }
.canvas-chat-head p { font-size: 12px; color: var(--canvas-text-muted); margin: 0; }
.canvas-chat-head button, .canvas-chat-message-actions button, .canvas-chat-composer-tools > button:first-child, .canvas-chat-model-row button {
  border: 0; background: transparent; color: var(--canvas-text-muted); border-radius: 8px; padding: 8px;
}
#canvasChatRoot button:hover:not(:disabled) { background: var(--canvas-surface-hover); color: var(--canvas-text); }
.canvas-chat-fold { width: 36px; height: 36px; display: grid; place-items: center; }
.canvas-chat-fold svg, .canvas-chat-launch svg { width: 20px; height: 20px; }
.canvas-chat-messages { flex: 1; min-height: 0; overflow-y: auto; overscroll-behavior: contain; padding: 24px 20px; scrollbar-width: thin; }
.canvas-chat-empty { min-height: 100%; display: flex; flex-direction: column; justify-content: center; align-items: flex-start; padding: 4px 8px 36px; }
.canvas-chat-empty-mark { font-size: 36px; color: var(--canvas-text-muted); letter-spacing: -.03em; margin-bottom: 24px; }
.canvas-chat-empty-mark > span { font-size: 21px; vertical-align: top; padding-left: 6px; }
.canvas-chat-empty h3 { font-size: 20px; font-weight: 500; margin: 0 0 12px; }
.canvas-chat-empty p { color: var(--canvas-text-muted); line-height: 1.9; margin: 0 0 28px; }
.canvas-chat-empty button { width: 100%; text-align: left; border: 1px solid var(--canvas-border-strong); border-radius: 10px; background: transparent; color: var(--canvas-text-soft); padding: 12px; line-height: 1.6; }
.canvas-chat-empty button span { float: right; }
.canvas-chat-message { margin-bottom: 28px; }
.canvas-chat-speaker { font-size: 12px; color: var(--canvas-text-muted); margin-bottom: 10px; }
.canvas-chat-text { white-space: pre-wrap; overflow-wrap: anywhere; line-height: 1.85; user-select: text; }
.canvas-chat-message.is-user .canvas-chat-text { background: var(--canvas-surface); border-radius: 12px; padding: 12px 14px; }
.canvas-chat-message-ref { color: var(--canvas-text-muted); font-size: 12px; margin: 0 0 8px; overflow-wrap: anywhere; }
.canvas-chat-message-actions { display: flex; gap: 10px; margin: 12px -8px 0; font-size: 12px; }
.canvas-chat-pending { color: var(--canvas-text-muted); display: flex; align-items: center; gap: 9px; padding: 8px 0; }
.canvas-chat-pending > span { width: 6px; height: 6px; background: currentColor; border-radius: 50%; animation: canvas-chat-pulse 1.5s ease-in-out infinite; }
.canvas-chat-feedback { padding: 10px 20px; font-size: 12px; line-height: 1.6; color: var(--canvas-text-muted); overflow-wrap: anywhere; }
.canvas-chat-feedback.is-error { color: var(--canvas-danger); }
.canvas-chat-composer { flex-shrink: 0; margin: 0 16px; padding: 12px; border: 1px solid var(--canvas-border-strong); background: var(--canvas-surface-float); border-radius: 14px; }
.canvas-chat-composer[inert] { opacity: .5; }
.canvas-chat-attach-tools { display: flex; align-items: center; gap: 2px; }
.canvas-chat-attach-tools button { border: 0; background: transparent; color: var(--canvas-text-muted); border-radius: 8px; padding: 8px 6px; white-space: nowrap; }
.canvas-chat-image-preview { width: 48px; height: 48px; object-fit: cover; border-radius: 5px; flex-shrink: 0; }
.canvas-chat-label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
.canvas-chat-composer textarea { width: 100%; min-height: 76px; max-height: 180px; resize: vertical; display: block; border: 0; background: transparent; color: var(--canvas-text); line-height: 1.7; padding: 4px; border-radius: 4px; }
.canvas-chat-composer textarea::placeholder { color: var(--canvas-text-muted); }
.canvas-chat-composer-tools { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin-top: 8px; }
.canvas-chat-send, .canvas-chat-stop { border: 0; border-radius: 9px; padding: 9px 13px; min-height: 36px; }
#canvasChatRoot .canvas-chat-send { background: var(--canvas-text); color: var(--canvas-bg); font-weight: 600; }
#canvasChatRoot .canvas-chat-send:hover:not(:disabled) { background: #d4d4d4; color: #0a0a0a; }
.canvas-chat-send span { margin-left: 8px; }
.canvas-chat-stop { background: var(--canvas-surface-raised); color: var(--canvas-text); }
.canvas-chat-model-row { display: flex; align-items: center; gap: 9px; padding-top: 13px; margin-top: 12px; border-top: 1px solid var(--canvas-border); font-size: 12px; color: var(--canvas-text-muted); }
.canvas-chat-model-row select { flex: 1; min-width: 0; color: var(--canvas-text-soft); background: var(--canvas-surface-float); border: 0; padding: 6px 4px; border-radius: 5px; color-scheme: dark; }
.canvas-chat-footer { flex-shrink: 0; padding: 12px 16px 16px; font-size: 11px; line-height: 1.5; color: var(--canvas-text-muted); text-align: center; }
.canvas-chat-reference { display: flex; align-items: center; gap: 8px; padding: 5px 8px; border-radius: 6px; background: var(--canvas-surface-raised); margin-bottom: 10px; font-size: 12px; }
.canvas-chat-reference span { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.canvas-chat-reference button { border: 0; color: var(--canvas-text-muted); background: transparent; padding: 4px 8px; }
.canvas-chat-launch { position: absolute; top: 20px; right: 20px; z-index: 80; display: flex; align-items: center; gap: 9px; padding: 11px 14px; background: var(--canvas-surface-float); color: var(--canvas-text-soft); border: 1px solid var(--canvas-border-strong); border-radius: 12px; font-size: 13px; }
.canvas-workbench.is-media-preview-open #canvasChatRoot { visibility: hidden; }
@keyframes canvas-chat-pulse { 50% { opacity: .3; } }
@media (prefers-reduced-motion: reduce) { .canvas-chat-pending > span { animation: none; } }
@media (max-width: 700px) {
  .canvas-page .canvas-workbench { --canvas-chat-width: min(100%, 380px); }
  .canvas-page .canvas-workbench.has-chat-panel > .canvas-stage-wrap { width: 100%; }
  .canvas-chat-head { padding: 14px 16px; }
  .canvas-chat-launch { top: 12px; right: 12px; }
  .canvas-chat-messages { padding: 20px 16px; }
}
@media (max-height: 600px) {
  .canvas-chat-head { padding: 10px 16px; }
  .canvas-chat-head p, .canvas-chat-footer { display: none; }
  .canvas-chat-composer { margin-bottom: 10px; }
  .canvas-chat-composer textarea { min-height: 46px; max-height: 80px; height: 46px; }
}