:root {
  --color-background: #FFFFFF;
  --color-foreground: #181818;
  --color-button: #181818;
  --color-button-text: #FFFFFF;
  --color-link: #181818;
  --color-detail: #181818;
  --color-muted-surface: #F7F7F7;
  --color-soft-surface: #FAFAFA;
  --color-border: rgba(24, 24, 24, 0.12);
  --color-border-strong: rgba(24, 24, 24, 0.22);
  --shadow-panel: none;
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --font-system: "DM Sans", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-weight-normal: 400;
  --font-weight-medium: 520;
  --font-weight-semibold: 650;
  --font-weight-bold: 760;
}

* { box-sizing: border-box; }
html, body { min-height: 100%; }
body {
  margin: 0;
  background: var(--color-background);
  color: var(--color-foreground);
  font-family: var(--font-system);
  font-weight: var(--font-weight-normal);
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
button, textarea, input { font: inherit; }
a { color: var(--color-link); text-decoration: none; }
a:hover { text-decoration: underline; }

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 304px minmax(0, 1fr);
  background: var(--color-background);
}

.sidebar {
  height: 100dvh;
  max-height: 100dvh;
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 22px;
  border-right: 1px solid var(--color-border);
  background: #FFFFFF;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.brand-row {
  display: flex;
  gap: 12px;
  align-items: center;
}
.brand-row strong { display: block; letter-spacing: -0.03em; font-weight: var(--font-weight-bold); }
.brand-row span { color: rgba(24, 24, 24, 0.62); font-size: 0.82rem; }
.brand-mark, .avatar {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: var(--color-button);
  color: var(--color-button-text);
  font-weight: 800;
}

.new-chat-button, .solid-button, .ghost-button, .conversation-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
}
.new-chat-button, .solid-button {
  background: var(--color-button);
  color: var(--color-button-text);
  padding: 12px 16px;
  font-weight: var(--font-weight-bold);
  font-size: 14px;
}
.ghost-button, .conversation-item {
  background: var(--color-background);
  color: var(--color-foreground);
  padding: 10px 14px;
}
.ghost-button:hover, .conversation-item:hover, .conversation-item.active {
  border-color: var(--color-border-strong);
  background: var(--color-soft-surface);
}

.sidebar-section { display: grid; gap: 8px; }
.section-label, .eyebrow, .message-label, .event-kicker {
  color: rgba(24, 24, 24, 0.56);
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0;
}
.conversation-item {
  text-align: left;
  display: grid;
  gap: 3px;
}
.conversation-item span { font-weight: var(--font-weight-bold); font-size: smaller; }
.conversation-item small { color: rgba(24, 24, 24, 0.58); }
.sidebar-section a {
  padding: 8px 0;
  font-size: 0.92rem;
  border-bottom: 1px solid var(--color-border);
}
.sidebar-footer {
  margin-top: auto;
  display: flex;
  gap: 8px;
  align-items: center;
  color: rgba(24, 24, 24, 0.68);
  font-size: 0.86rem;
}
.status-dot {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: rgba(24, 24, 24, 0.28);
}
.status-dot.ok { background: var(--color-detail); }
.status-dot.error { background: transparent; border: 2px solid var(--color-detail); }

.main-panel {
  min-width: 0;
  height: 100dvh;
  max-height: 100dvh;
  overflow: hidden;
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr) auto;
}
.topbar {
  padding: 24px 32px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.topbar h1 {
  margin: 2px 0 0;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  letter-spacing: -0.06em;
}
.topbar-actions { display: flex; gap: 10px; flex-wrap: wrap; }

.workspace-strip {
  padding: 0 32px 18px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
.mini-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-background);
  padding: 14px 16px;
  box-shadow: var(--shadow-panel);
}
.mini-card span { display: block; color: rgba(24, 24, 24, 0.56); font-size: 0.8rem; }
.mini-card strong { display: block; margin-top: 5px; }

.chat-stream {
  overflow: auto;
  min-height: 0;
  padding: 10px 32px 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.message {
  max-width: 920px;
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  gap: 12px;
  align-items: flex-start;
}
.message.user-message {
  margin-left: auto;
  grid-template-columns: minmax(0, 1fr) 36px;
}
.message.user-message .avatar { order: 2; background: var(--color-background); color: var(--color-foreground); border: 1px solid var(--color-border-strong); }
.message-body {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: rgba(255, 255, 255, 0.9);
  padding: 18px;
  box-shadow: var(--shadow-panel);
}
.message-body p { line-height: 1.55; }
.event-card {
  margin-top: 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-muted-surface);
  padding: 14px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}
.event-status {
  border: 1px solid var(--color-border-strong);
  border-radius: 999px;
  padding: 5px 10px;
  font-size: 0.78rem;
  font-weight: 800;
}

.composer {
  margin: 0 32px 28px;
  padding: 10px;
  border: 1px solid var(--color-border-strong);
  border-radius: 24px;
  background: var(--color-background);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  box-shadow: var(--shadow-panel);
}
.composer textarea {
  border: 0;
  outline: 0;
  resize: none;
  min-height: 44px;
  max-height: 160px;
  padding: 12px 10px;
  color: var(--color-foreground);
  background: transparent;
}
.send-button { min-width: 96px; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 860px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar { min-height: auto; border-right: 0; border-bottom: 1px solid var(--color-border); }
  .main-panel { height: 100dvh; min-height: 0; }
  .workspace-strip { grid-template-columns: 1fr; }
  .topbar, .workspace-strip, .chat-stream { padding-left: 18px; padding-right: 18px; }
  .composer { margin-left: 18px; margin-right: 18px; }
}

.session-subtitle {
  margin: 6px 0 0;
  color: rgba(24, 24, 24, 0.58);
  font-size: 0.9rem;
}
.conversation-list {
  display: grid;
  gap: 8px;
}
.event-details {
  margin: 8px 0 0;
  padding-left: 18px;
  color: rgba(24, 24, 24, 0.66);
  font-size: 0.82rem;
  line-height: 1.45;
}
.conversation-item:disabled {
  cursor: default;
  opacity: 0.75;
}

/* M4.2 — Streaming Event Renderer */
.workspace-strip {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
.stream-timeline {
  max-width: 920px;
  display: grid;
  gap: 10px;
  margin-bottom: 6px;
}
.stream-event {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-soft-surface);
  padding: 12px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: start;
}
.stream-event-kind {
  border: 1px solid var(--color-border-strong);
  border-radius: 999px;
  padding: 4px 8px;
  font-size: 0.7rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--color-background);
}
.stream-event strong { display: block; font-size: 0.92rem; }
.stream-event p { margin: 5px 0 0; color: rgba(24, 24, 24, 0.74); line-height: 1.45; }
.stream-event small { display: block; margin-top: 6px; color: rgba(24, 24, 24, 0.52); }
.stream-event-error {
  background: repeating-linear-gradient(135deg, rgba(24,24,24,0.035), rgba(24,24,24,0.035) 8px, var(--color-soft-surface) 8px, var(--color-soft-surface) 16px);
}
.event-card-error .event-status,
.stream-event-error .event-status {
  border-color: var(--color-foreground);
}
@media (max-width: 1040px) {
  .workspace-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 860px) {
  .workspace-strip { grid-template-columns: 1fr; }
  .stream-event { grid-template-columns: 1fr; }
}

/* M4.3 — Job Cards & Operational Truth UI */
.workspace-strip {
  grid-template-columns: repeat(6, minmax(0, 1fr));
}
.job-board {
  max-width: 920px;
  display: grid;
  gap: 12px;
  margin-bottom: 6px;
}
.job-board[hidden] { display: none; }
.job-board-header,
.job-card {
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-lg);
  background: var(--color-background);
  box-shadow: var(--shadow-panel);
}
.job-board-header {
  padding: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.job-card {
  padding: 14px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: start;
}
.job-card-main strong { display: block; margin-top: 2px; }
.job-card-main p {
  margin: 7px 0 0;
  color: rgba(24, 24, 24, 0.74);
  line-height: 1.45;
}
.job-actions {
  margin-top: 10px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.job-actions span {
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 5px 9px;
  background: var(--color-soft-surface);
  color: rgba(24, 24, 24, 0.74);
  font-size: 0.76rem;
  font-weight: 800;
}
.job-card-failed,
.job-card-blocked {
  background: repeating-linear-gradient(135deg, rgba(24,24,24,0.035), rgba(24,24,24,0.035) 8px, var(--color-background) 8px, var(--color-background) 16px);
}
.job-card-waiting_approval,
.job-card-waiting_input {
  background: linear-gradient(180deg, rgba(24,24,24,0.035), var(--color-background));
}
.job-card-completed,
.job-card-available {
  border-color: rgba(24, 24, 24, 0.18);
}
@media (max-width: 1180px) {
  .workspace-strip { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 860px) {
  .workspace-strip { grid-template-columns: 1fr; }
  .job-card, .job-board-header { grid-template-columns: 1fr; }
}


/* M4.4 — Approval Flow UI */
.approval-button {
  border: 1px solid var(--color-border-strong);
  border-radius: 999px;
  padding: 6px 11px;
  background: var(--color-background);
  color: var(--color-foreground);
  font-size: 0.76rem;
  font-weight: 900;
  cursor: pointer;
}
.approval-button.primary {
  background: var(--color-button);
  color: var(--color-button-text);
}
.approval-button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}
.approval-note {
  width: min(100%, 360px);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 7px 10px;
  background: var(--color-background);
  color: var(--color-foreground);
}
.job-card-approved {
  border-color: rgba(24,24,24,0.22);
}
.job-card-rejected {
  background: repeating-linear-gradient(135deg, rgba(24,24,24,0.035), rgba(24,24,24,0.035) 8px, var(--color-background) 8px, var(--color-background) 16px);
}

/* M4.6 — Conversation Persistence builds on File / ZIP / Media / Browser Panels */
.workspace-strip {
  grid-template-columns: repeat(7, minmax(0, 1fr));
}
.delivery-panel {
  max-width: 920px;
  display: grid;
  gap: 12px;
  margin-bottom: 6px;
}
.delivery-panel[hidden] { display: none; }
.delivery-panel-header,
.delivery-card {
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-lg);
  background: var(--color-background);
  box-shadow: var(--shadow-panel);
}
.delivery-panel-header {
  padding: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.delivery-card {
  padding: 14px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: start;
}
.delivery-card-main strong { display: block; margin-top: 2px; }
.delivery-card-main p {
  margin: 7px 0 0;
  color: rgba(24, 24, 24, 0.74);
  line-height: 1.45;
}
.delivery-actions {
  margin-top: 10px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.delivery-actions a,
.delivery-actions span,
.panel-button {
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 6px 10px;
  background: var(--color-soft-surface);
  color: var(--color-foreground);
  font-size: 0.76rem;
  font-weight: 900;
  text-decoration: none;
}
.panel-button {
  cursor: pointer;
}
.delivery-card-zip_panel,
.delivery-card-browser_panel {
  background: linear-gradient(180deg, rgba(24,24,24,0.035), var(--color-background));
}
.delivery-card-failed {
  background: repeating-linear-gradient(135deg, rgba(24,24,24,0.035), rgba(24,24,24,0.035) 8px, var(--color-background) 8px, var(--color-background) 16px);
}
@media (max-width: 1280px) {
  .workspace-strip { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
@media (max-width: 860px) {
  .workspace-strip { grid-template-columns: 1fr; }
  .delivery-card, .delivery-panel-header { grid-template-columns: 1fr; }
}

/* M4.7 — Product UX Polish Pass */
.workspace-strip {
  grid-template-columns: repeat(8, minmax(0, 1fr));
}
.markdown-content {
  display: grid;
  gap: 10px;
}
.markdown-content p,
.markdown-content ul {
  margin: 0;
  line-height: 1.58;
}
.markdown-content .markdown-list,
.markdown-list {
  margin: 11px 0px;
  padding-left: 1.15rem;
}
.code-block {
  margin: 6px 0 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #111111;
  color: #FFFFFF;
}
.code-block figcaption {
  padding: 8px 12px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
  color: rgba(255,255,255,0.72);
  font-size: 0.76rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.code-block pre {
  margin: 0;
  padding: 12px;
  overflow: auto;
  max-height: 340px;
}
.code-block code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.86rem;
  line-height: 1.5;
  white-space: pre;
}
.attachment-chips,
.attachment-strip {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.attachment-chip {
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 6px 10px;
  background: var(--color-soft-surface);
  color: var(--color-foreground);
  font-size: 0.76rem;
  font-weight: 850;
  text-decoration: none;
}
.attachment-chip-button {
  cursor: pointer;
}
.composer {
  gap: 12px;
  align-items: end;
}
.composer-stack {
  min-width: 0;
  flex: 1;
  display: grid;
  gap: 8px;
}
.composer-hint {
  margin: 0;
  color: rgba(24, 24, 24, 0.54);
  font-size: 0.78rem;
}
.composer.is-busy {
  opacity: 0.82;
}
.send-button:disabled {
  cursor: wait;
  opacity: 0.72;
}
.toast-region {
  position: fixed;
  left: 50%;
  bottom: 45px;
  transform: translateX(-50%);
  width: min(520px, calc(100vw - 36px));
  display: grid;
  gap: 10px;
  justify-items: center;
  z-index: 80;
  pointer-events: none;
}
.toast {
  position: relative;
  min-height: 48px;
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  border: 0;
  border-radius: 50px;
  background: #181818;
  color: #FFFFFF;
  box-shadow: 0 18px 60px rgba(24, 24, 24, 0.22);
  padding: 10px 14px 10px 12px;
  max-width: min(520px, calc(100vw - 36px));
  pointer-events: auto;
}
.toast-icon {
  width: 22px;
  height: 22px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  font-size: 0.78rem;
  font-weight: 900;
  color: #181818;
  background: #D9E7FF;
}
.toast-success .toast-icon { background: #52E676; }
.toast-info .toast-icon { background: #D9E7FF; }
.toast-warning .toast-icon { background: #FFD166; }
.toast-error .toast-icon { background: #FF6868; }
.toast strong {
  display: block;
  color: #FFFFFF;
  font-size: 0.92rem;
  line-height: 1.2;
}
.toast p {
  margin: 2px 0 0;
  line-height: 1.35;
  color: rgba(255, 255, 255, 0.76);
}
.toast small {
  display: block;
  margin-top: 3px;
  color: rgba(255, 255, 255, 0.58);
}
.toast-close {
  position: static;
  border: 0;
  background: transparent;
  color: #FFFFFF;
  font-size: 1rem;
  cursor: pointer;
  opacity: 0.72;
}
.toast-close:hover { opacity: 1; }
.conversation-item:focus-visible,
.solid-button:focus-visible,
.ghost-button:focus-visible,
.approval-button:focus-visible,
.panel-button:focus-visible,
.attachment-chip-button:focus-visible,
textarea:focus-visible,
input:focus-visible {
  outline: 3px solid rgba(24, 24, 24, 0.22);
  outline-offset: 2px;
}
@media (max-width: 1280px) {
  .workspace-strip { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
@media (max-width: 980px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar {
    min-height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--color-border);
  }
  .main-panel { height: 100dvh; min-height: 0; }
  .topbar { flex-direction: column; align-items: stretch; }
}
@media (max-width: 720px) {
  .workspace-strip { grid-template-columns: 1fr; padding-inline: 18px; }
  .chat-stream { padding-inline: 18px; }
  .topbar { padding-inline: 18px; }
  .message,
  .message.user-message { grid-template-columns: 1fr; margin-left: 0; }
  .message .avatar { display: none; }
  .composer { flex-direction: column; align-items: stretch; }
}

.media-inline-card {
  margin-top: 14px;
  border: 1px solid var(--color-border);
  border-radius: 40px;
  background: var(--color-muted-surface);
  overflow: hidden;
  box-shadow: var(--shadow-panel);
  position: relative;
}
.media-preview-area {
  min-height: 260px;
  display: grid;
  place-items: center;
  background: rgba(24, 24, 24, 0.035);
  position: relative;
}
.media-preview-area img,
.media-preview-area video {
  width: 100%;
  max-height: 620px;
  object-fit: contain;
  display: block;
  cursor: zoom-in;
}
.media-inline-footer {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.media-inline-footer > span {
  position: absolute;
  left: 18px;
  bottom: 16px;
  border-radius: 999px;
  padding: 8px 12px;
  background: rgba(24, 24, 24, 0.58);
  color: #fff;
  font-weight: 750;
  opacity: 0;
  transition: opacity 160ms ease, transform 160ms ease;
  transform: translateY(4px);
}
.media-inline-loading .media-inline-footer > span {
  opacity: 1;
  transform: translateY(0);
}
.media-actions {
  position: absolute;
  top: 16px;
  right: 16px;
  display: flex;
  gap: 8px;
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity 160ms ease, transform 160ms ease;
  pointer-events: none;
}
.media-inline-card:hover .media-actions,
.media-inline-card:focus-within .media-actions,
.media-inline-card:hover .media-inline-footer > span,
.media-inline-card:focus-within .media-inline-footer > span {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.media-action-button {
  width: 42px;
  height: 42px;
  display: inline-grid;
  place-items: center;
  border: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  color: #181818;
  font-weight: 900;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 10px 30px rgba(0,0,0,0.18);
  backdrop-filter: blur(10px);
}
.media-action-button:hover {
  background: #fff;
}
.media-skeleton {
  width: min(560px, 80%);
  min-height: 210px;
  border-radius: 40px;
  background: linear-gradient(90deg, rgba(24,24,24,0.06), rgba(24,24,24,0.13), rgba(24,24,24,0.06));
  background-size: 220% 100%;
  animation: mediaSkeletonPulse 1.35s ease-in-out infinite;
}
@keyframes mediaSkeletonPulse {
  0% { background-position: 0% 50%; }
  100% { background-position: 220% 50%; }
}
.media-lightbox {
  position: fixed;
  inset: 0;
  z-index: 120;
  background: rgba(0, 0, 0, 0.82);
  display: grid;
  place-items: center;
  padding: 30px;
}
.media-lightbox img,
.media-lightbox video {
  max-width: min(1180px, 94vw);
  max-height: 86vh;
  border-radius: 28px;
  box-shadow: 0 28px 100px rgba(0,0,0,0.42);
  background: #111;
}
.media-lightbox-close,
.media-lightbox-download {
  position: fixed;
  top: 24px;
  border: 0;
  border-radius: 999px;
  background: #FFFFFF;
  color: #181818;
  padding: 10px 14px;
  font-weight: 850;
  text-decoration: none;
  cursor: pointer;
}
.media-lightbox-close { right: 24px; }
.media-lightbox-download { right: 76px; }

/* M4.9.3.11 — quiet first-token loader for real provider streaming. */
.streaming-chat-status {
  min-height: 18px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
  color: rgba(24, 24, 24, 0.58);
  font-size: 0.82rem;
}
.streaming-chat-status[hidden] { display: none; }
.streaming-pulse {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  height: 16px;
}
.streaming-pulse[hidden] { display: none; }
.streaming-pulse i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  animation: chronosStreamingPulse 1.05s ease-in-out infinite;
}
.streaming-pulse i:nth-child(2) { animation-delay: 0.14s; }
.streaming-pulse i:nth-child(3) { animation-delay: 0.28s; }
@keyframes chronosStreamingPulse {
  0%, 60%, 100% { opacity: 0.26; transform: translateY(0) scale(0.86); }
  30% { opacity: 1; transform: translateY(-2px) scale(1); }
}
@media (prefers-reduced-motion: reduce) {
  .streaming-pulse i { animation: none; opacity: 0.7; }
}

/* M4.9.4.1 — assistant Markdown body and visual supplements are separate surfaces. */
.message-supplements {
  margin-top: 14px;
  display: grid;
  gap: 12px;
}
.message-supplements:empty {
  display: none;
}
.message-supplements .event-card,
.message-supplements .media-inline-card {
  margin-top: 0;
}
.message-supplement {
  min-width: 0;
}
.event-card-action {
  flex: 0 0 auto;
  border: 1px solid #181818;
  border-radius: 999px;
  padding: 8px 14px;
  background: #181818;
  color: #FFFFFF;
  font-size: 0.82rem;
  font-weight: 850;
  line-height: 1;
  text-decoration: none;
}
.event-card-action:hover {
  opacity: 0.82;
}
.event-card-action:focus-visible {
  outline: 3px solid rgba(24, 24, 24, 0.22);
  outline-offset: 2px;
}
@media (max-width: 620px) {
  .message-supplements .event-card {
    align-items: flex-start;
    flex-direction: column;
  }
}

/* M4.9.4.2.1 — single textual files render as first-class inline code, never event cards. */
.code-block {
  background: #FFFFFF;
  color: #181818;
  border-color: #E4E4E4;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.02);
}
.code-block-toolbar {
  min-height: 42px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 10px 8px 14px;
  border-bottom: 1px solid #ECECEC;
  color: #6B6B6B;
  background: #FAFAFA;
  text-transform: none;
  letter-spacing: 0;
}
.code-block-language {
  font-size: 0.76rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.code-block-actions {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.code-block-action {
  appearance: none;
  border: 0;
  border-radius: 8px;
  padding: 6px 9px;
  background: transparent;
  color: #5F5F5F;
  font: inherit;
  font-size: 0.76rem;
  font-weight: 750;
  cursor: pointer;
}
.code-block-action:hover,
.code-block-action:focus-visible {
  background: #EFEFEF;
  color: #181818;
  outline: none;
}
.code-block pre {
  max-height: 560px;
  padding: 16px;
  background: #FFFFFF;
}
.code-block code {
  color: #181818;
  tab-size: 2;
}
.code-block-collapsed pre {
  display: none;
}
.code-block-collapsed .code-block-toolbar {
  border-bottom: 0;
}

/* M4.9.4.2.1 — downloadable code blocks with safe syntax colorization. */
.code-block {
  border-color: #2A2A2A;
  background: #101214;
  color: #F5F7FA;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
}
.code-block-toolbar {
  min-height: 46px;
  padding: 8px 10px 8px 14px;
  border-bottom-color: rgba(255, 255, 255, 0.09);
  background: #17191C;
  color: #D7DBE0;
}
.code-block-identity {
  min-width: 0;
  display: inline-flex;
  align-items: center;
  gap: 9px;
}
.code-block-language {
  flex: 0 0 auto;
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 850;
  letter-spacing: 0.055em;
}
.code-block-filename {
  min-width: 0;
  max-width: min(42vw, 360px);
  overflow: hidden;
  color: #9198A1;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.72rem;
  font-weight: 650;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.code-block-actions {
  flex: 0 0 auto;
  gap: 6px;
}
.code-block-action {
  min-height: 30px;
  border: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: 8px;
  padding: 5px 9px;
  background: rgba(255, 255, 255, 0.035);
  color: #C9CED5;
  font-size: 0.72rem;
  font-weight: 760;
}
.code-block-action:hover,
.code-block-action:focus-visible {
  border-color: rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.095);
  color: #FFFFFF;
  outline: none;
}
.code-block-download {
  background: #F4F5F6;
  border-color: #F4F5F6;
  color: #181818;
}
.code-block-download:hover,
.code-block-download:focus-visible {
  background: #FFFFFF;
  border-color: #FFFFFF;
  color: #000000;
}
.code-block pre {
  max-height: 600px;
  padding: 18px;
  background: #101214;
  scrollbar-color: #454A50 #101214;
}
.code-block code {
  color: #E7EAF0;
  font-size: 0.85rem;
  line-height: 1.62;
  text-shadow: none;
}
.syntax-token.syntax-comment { color: #7F8A96; font-style: italic; }
.syntax-token.syntax-tag { color: #FF7B9C; }
.syntax-token.syntax-attribute { color: #72D6E8; }
.syntax-token.syntax-string { color: #A6E3A1; }
.syntax-token.syntax-property { color: #8CC8FF; }
.syntax-token.syntax-keyword { color: #C7A0FF; font-weight: 650; }
.syntax-token.syntax-number { color: #F2B36D; }
.syntax-token.syntax-function { color: #FFD479; }
.syntax-token.syntax-variable { color: #FFB86C; }
.syntax-token.syntax-operator { color: #89DCEB; }
.syntax-token.syntax-punctuation { color: #B8C0CC; }
.code-block-collapsed .code-block-toolbar {
  border-bottom: 0;
}
@media (max-width: 700px) {
  .code-block-toolbar {
    align-items: flex-start;
    flex-direction: column;
  }
  .code-block-actions {
    width: 100%;
    justify-content: flex-end;
  }
  .code-block-filename {
    max-width: 64vw;
  }
}


/* M4.9.5.15 — lane-aware loading and live code cursor. */
.streaming-status-label {
  color: rgba(24, 24, 24, 0.58);
  font-weight: 650;
}
.streaming-status-label:empty { display: none; }
.code-block-streaming {
  position: relative;
}
.code-block-streaming .code-block-toolbar::after {
  content: 'streaming';
  margin-left: 8px;
  color: #7F8A96;
  font-size: 0.68rem;
  font-weight: 750;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.code-stream-cursor {
  display: inline-block;
  color: #FFFFFF;
  animation: chronosCodeCursor 0.95s steps(2, start) infinite;
}
@keyframes chronosCodeCursor {
  0%, 46% { opacity: 1; }
  47%, 100% { opacity: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .code-stream-cursor { animation: none; }
}

/* M4.9.5.15 — inline Markdown rendering for assistant text. */
.markdown-content strong {
  font-weight: 760;
}
.markdown-content em {
  font-style: italic;
}
.markdown-content a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 0.18em;
}
.markdown-inline-code {
  padding: 0.08em 0.34em;
  border: 1px solid rgba(24, 24, 24, 0.12);
  border-radius: 6px;
  background: rgba(24, 24, 24, 0.045);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', monospace;
  font-size: 0.92em;
}
.markdown-heading {
  margin: 0;
  font-size: 1rem;
  line-height: 1.35;
  font-weight: 760;
}
.markdown-heading-1 { font-size: 1.18rem; }
.markdown-heading-2 { font-size: 1.1rem; }
.markdown-heading-3 { font-size: 1.04rem; }
.markdown-heading-4,
.markdown-heading-5,
.markdown-heading-6 { font-size: 0.98rem; }
.markdown-content del {
  text-decoration-thickness: 0.08em;
  text-decoration-color: rgba(24, 24, 24, 0.56);
}
.markdown-rule {
  width: 100%;
  height: 1px;
  border: 0;
  margin: 11px 0px;
  background: rgba(24, 24, 24, 0.14);
}
.markdown-blockquote {
  margin: 11px 0px;
  padding: 8px 12px;
  border-left: 3px solid rgba(24, 24, 24, 0.24);
  color: rgba(24, 24, 24, 0.74);
  background: rgba(24, 24, 24, 0.025);
  border-radius: 0 12px 12px 0;
}
.markdown-blockquote p {
  margin: 0;
}
.markdown-blockquote p + p {
  margin-top: 8px;
}
.markdown-task-item {
  list-style: none;
}
.markdown-task-marker {
  display: inline-block;
  min-width: 1.35em;
  margin-left: -1.35em;
  color: rgba(24, 24, 24, 0.72);
}
.markdown-image-link {
  font-weight: 680;
}


/* M4.9.5.15 — typography, sidebar layout, debug-only operational surfaces. */
strong,
b {
  font-weight: var(--font-weight-bold);
}
.markdown-content strong {
  font-weight: 780;
}
.new-chat-button,
.solid-button {
  font-size: 14px;
}
.debug-button[aria-pressed="true"] {
  background: var(--color-background);
  color: var(--color-foreground);
  border-color: var(--color-border-strong);
}
body:not(.debug-mode) .workspace-strip,
body:not(.debug-mode) #streamTimeline,
body:not(.debug-mode) .job-board-header,
body:not(.debug-mode) .job-card {
  display: none !important;
}
body.debug-mode .workspace-strip {
  display: grid;
}
body.debug-mode #streamTimeline {
  display: grid;
}
body.debug-mode .job-board-header {
  display: flex;
}
body.debug-mode .job-card {
  display: grid;
}
#composerForm {
  position: sticky;
  bottom: 0;
  z-index: 30;
}
@media (max-width: 980px) {
  .sidebar {
    height: auto;
    max-height: 100dvh;
    overflow-y: auto;
  }
  .main-panel {
    height: 100dvh;
    min-height: 0;
    overflow: hidden;
  }
}


/* M4.9.5.15 — composer visibility and Chronos Markdown table rendering. */
.main-panel {
  grid-template-rows: auto auto minmax(0, 1fr) auto;
}
#composerForm,
.composer {
  display: grid !important;
  visibility: visible !important;
  opacity: 1;
}
#composerForm {
  position: relative;
  bottom: auto;
  z-index: 35;
  flex-shrink: 0;
}
.chat-stream {
  padding-bottom: 16px;
}
.markdown-table-wrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: 18px;
  background: var(--color-background);
  box-shadow: 0 12px 34px rgba(24, 24, 24, 0.055);
}
.markdown-table,
.chronos-table {
  width: 100%;
  min-width: 620px;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 0.92rem;
  line-height: 1.42;
}
.markdown-table th,
.markdown-table td {
  padding: 12px 14px;
  border-bottom: 1px solid rgba(24, 24, 24, 0.10);
  vertical-align: top;
}
.markdown-table th {
  background: rgba(24, 24, 24, 0.045);
  color: var(--color-foreground);
  font-weight: 780;
  letter-spacing: -0.01em;
  text-align: left;
  white-space: nowrap;
}
.markdown-table tbody tr:nth-child(even) td {
  background: rgba(24, 24, 24, 0.022);
}
.markdown-table tbody tr:hover td {
  background: rgba(24, 24, 24, 0.048);
}
.markdown-table tr:last-child td {
  border-bottom: 0;
}
.markdown-table .align-left { text-align: left; }
.markdown-table .align-center { text-align: center; }
.markdown-table .align-right { text-align: right; }
.markdown-content .markdown-table-wrap {
  margin: 2px 0;
}
@media (max-width: 720px) {
  .main-panel {
    height: 100dvh;
    min-height: 0;
  }
  .composer {
    margin: 0 18px 18px;
  }
  .markdown-table,
  .chronos-table {
    min-width: 560px;
    font-size: 0.86rem;
  }
}


/* M4.9.5.15 — composer structural dock, no MutationObserver guard. */
.main-panel {
  height: 100dvh;
  max-height: 100dvh;
  min-height: 0;
  overflow: hidden;
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr) auto;
}
.chat-stream {
  min-height: 0;
  overflow: auto;
  padding-bottom: 16px;
}
.composer-dock,
body.debug-mode .composer-dock,
body:not(.debug-mode) .composer-dock,
.composer-dock[hidden],
.composer-dock[aria-hidden="true"] {
  display: block !important;
  visibility: visible !important;
  opacity: 1 !important;
  grid-row: 4;
  min-height: max-content;
  flex: 0 0 auto;
  padding: 8px 32px 28px;
  background: linear-gradient(180deg, rgba(255,255,255,0), var(--color-background) 26%);
  z-index: 42;
}
#composerForm.composer,
body.debug-mode #composerForm.composer,
body:not(.debug-mode) #composerForm.composer,
#composerForm.composer[hidden],
#composerForm.composer[aria-hidden="true"] {
  display: grid !important;
  visibility: visible !important;
  opacity: 1 !important;
  position: relative;
  bottom: auto;
  margin: 0;
  z-index: 43;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
}
#composerForm .composer-stack,
body.debug-mode #composerForm .composer-stack,
body:not(.debug-mode) #composerForm .composer-stack {
  display: grid !important;
  visibility: visible !important;
  opacity: 1 !important;
  min-width: 0;
}
#composerForm textarea,
body.debug-mode #composerForm textarea,
body:not(.debug-mode) #composerForm textarea {
  display: block !important;
  visibility: visible !important;
  opacity: 1 !important;
}
#composerForm .composer-hint,
body.debug-mode #composerForm .composer-hint,
body:not(.debug-mode) #composerForm .composer-hint {
  display: block !important;
  visibility: visible !important;
  opacity: 1 !important;
}
#composerForm .send-button,
body.debug-mode #composerForm .send-button,
body:not(.debug-mode) #composerForm .send-button {
  display: inline-flex !important;
  visibility: visible !important;
  opacity: 1 !important;
  align-items: center;
  justify-content: center;
}
body:not(.debug-mode) .workspace-strip,
body:not(.debug-mode) #streamTimeline,
body:not(.debug-mode) .job-board-header,
body:not(.debug-mode) .job-card {
  display: none !important;
}
body.debug-mode .workspace-strip { display: grid; }
body.debug-mode #streamTimeline { display: grid; }
body.debug-mode .job-board-header { display: flex; }
body.debug-mode .job-card { display: grid; }
@media (max-width: 720px) {
  .composer-dock,
  body.debug-mode .composer-dock,
  body:not(.debug-mode) .composer-dock {
    padding: 8px 16px 18px;
  }
  #composerForm.composer,
  body.debug-mode #composerForm.composer,
  body:not(.debug-mode) #composerForm.composer {
    grid-template-columns: 1fr;
  }
}

/* M4.9.6.1 — Attachment Surface Foundation */
.composer {
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: end;
}
.attachment-picker-button {
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-border-strong);
  border-radius: 16px;
  background: var(--color-background);
  color: var(--color-foreground);
  font-size: 1.35rem;
  line-height: 1;
  font-weight: 760;
  cursor: pointer;
}
.attachment-picker-button:hover {
  background: var(--color-soft-surface);
}
.attachment-strip {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  padding: 2px 2px 4px;
  flex-wrap: nowrap;
}
.attachment-strip[hidden] {
  display: none !important;
}
.attachment-preview-card {
  position: relative;
  flex: 0 0 auto;
  width: 168px;
  min-height: 78px;
  border: 1px solid var(--color-border);
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(24,24,24,0.018), var(--color-background));
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  padding: 8px 30px 8px 8px;
  box-shadow: 0 8px 22px rgba(24,24,24,0.045);
}
.attachment-preview-thumb {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  overflow: hidden;
  display: grid;
  place-items: center;
  background: #181818;
  color: #FFFFFF;
  font-size: 0.68rem;
  font-weight: 850;
  letter-spacing: 0.04em;
}
.attachment-preview-thumb img,
.attachment-preview-thumb video {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}
.attachment-preview-meta {
  min-width: 0;
  display: grid;
  gap: 3px;
}
.attachment-preview-meta strong {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  font-size: 0.78rem;
  font-weight: 760;
}
.attachment-preview-meta small {
  color: rgba(24,24,24,0.58);
  font-size: 0.72rem;
}
.attachment-remove-button {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 20px;
  height: 20px;
  border: 0;
  border-radius: 999px;
  background: #181818;
  color: #FFFFFF;
  display: grid;
  place-items: center;
  cursor: pointer;
  font-weight: 760;
  line-height: 1;
}
.attachment-preview-archive .attachment-preview-thumb {
  background: repeating-linear-gradient(135deg, #181818, #181818 8px, #2A2A2A 8px, #2A2A2A 16px);
}
.attachment-preview-document .attachment-preview-thumb {
  background: var(--color-soft-surface);
  color: var(--color-foreground);
  border: 1px solid var(--color-border);
}
@media (max-width: 704px) {
  .composer {
    grid-template-columns: auto minmax(0, 1fr);
  }
  .send-button {
    grid-column: 1 / -1;
  }
  .attachment-preview-card {
    width: 150px;
  }
}

/* M4.9.6.1 — Attachment Composer Layout Repair
   The attachment picker introduced in M4.9.6.0 must not be captured by the
   older two-column composer rule. Keep the form as three explicit areas:
   picker, prompt stack and send action. */
#composerForm.composer,
body.debug-mode #composerForm.composer,
body:not(.debug-mode) #composerForm.composer {
  display: grid !important;
  grid-template-columns: 48px minmax(0, 1fr) minmax(104px, auto) !important;
  grid-template-areas: "attachment-picker composer-stack composer-send" !important;
  column-gap: 12px !important;
  row-gap: 10px !important;
  align-items: end !important;
}

#composerForm .attachment-picker-button {
  grid-area: attachment-picker;
  align-self: end;
  justify-self: stretch;
  display: inline-grid;
  place-items: center;
}

#composerForm #attachmentInput.sr-only {
  grid-area: attachment-picker;
}

#composerForm .composer-stack,
body.debug-mode #composerForm .composer-stack,
body:not(.debug-mode) #composerForm .composer-stack {
  grid-area: composer-stack;
  min-width: 0;
  width: 100%;
}

#composerForm .send-button,
body.debug-mode #composerForm .send-button,
body:not(.debug-mode) #composerForm .send-button {
  grid-area: composer-send;
  align-self: end;
  justify-self: stretch;
  min-width: 104px;
  height: 48px;
  white-space: nowrap;
}

#composerForm #composerInput {
  width: 100%;
  min-width: 0;
}

@media (max-width: 704px) {
  #composerForm.composer,
  body.debug-mode #composerForm.composer,
  body:not(.debug-mode) #composerForm.composer {
    grid-template-columns: 48px minmax(0, 1fr) !important;
    grid-template-areas:
      "attachment-picker composer-stack"
      "composer-send composer-send" !important;
  }

  #composerForm .send-button,
  body.debug-mode #composerForm .send-button,
  body:not(.debug-mode) #composerForm .send-button {
    width: 100%;
  }
}

/* M4.9.6.16 — lazy video player surface. */
.media-lazy-video {
  width: 100%;
  min-height: 280px;
  border: 0;
  padding: 0;
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(24,24,24,0.88), rgba(24,24,24,0.62));
  color: #fff;
  cursor: pointer;
}
.media-lazy-video-poster {
  width: 100%;
  height: 100%;
  min-height: 280px;
  object-fit: cover;
  display: block;
  filter: brightness(0.68);
}
.media-lazy-video-overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 8px;
  padding: 24px;
  text-align: center;
  background: radial-gradient(circle at center, rgba(0,0,0,0.18), rgba(0,0,0,0.48));
}
.media-lazy-video-overlay strong {
  width: 72px;
  height: 72px;
  display: inline-grid;
  place-items: center;
  border-radius: 999px;
  background: #fff;
  color: #181818;
  font-size: 26px;
  box-shadow: 0 20px 70px rgba(0,0,0,0.28);
}
.media-lazy-video-overlay span {
  font-weight: 850;
  font-size: 18px;
}
.media-lazy-video-overlay small {
  color: rgba(255,255,255,0.8);
  font-weight: 650;
}

.media-unavailable {
  display: grid;
  min-height: 180px;
  place-items: center;
  border: 1px dashed var(--color-border, #d7d7d7);
  border-radius: 24px;
  color: var(--color-muted, #777777);
  font-size: 14px;
  background: rgba(255, 255, 255, 0.72);
}


/* M4.9.6.21 — Frontend Shell Navigation, mobile drawer, pasted-image attachment UX and blank Studio route. */
html,
body {
  background: #FFFFFF;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.sidebar {
  background: #FFFFFF;
}

.brand-row {
  min-height: 34px;
}

.brand-row strong {
  font-size: 1rem;
}

.brand-row span {
  display: block;
  margin-top: 2px;
}

.sidebar-main-menu {
  gap: 4px;
}

.sidebar-nav-item {
  width: 100%;
  min-height: 40px;
  border: 0;
  border-radius: 12px;
  padding: 8px 10px;
  display: flex;
  align-items: center;
  gap: 10px;
  background: transparent;
  color: var(--color-foreground);
  font: inherit;
  font-size: 0.94rem;
  font-weight: 620;
  text-align: left;
  text-decoration: none;
  cursor: pointer;
}

.sidebar-nav-item:hover,
.sidebar-nav-item.active {
  background: #F0F0F0;
  text-decoration: none;
}

.sidebar-nav-icon {
  width: 22px;
  flex: 0 0 22px;
  display: inline-grid;
  place-items: center;
  color: #181818;
  font-size: 0.98rem;
  line-height: 1;
}

.debug-shortcuts {
  display: none;
}

body.debug-mode .debug-shortcuts {
  display: grid;
}

.route-navbar {
  min-height: 64px;
  padding: 10px 32px 6px;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) 84px;
  align-items: center;
  gap: 12px;
  background: #FFFFFF;
}

.mode-switch {
  justify-self: center;
  width: min(320px, 100%);
  min-height: 44px;
  padding: 3px;
  border: 1px solid rgba(24, 24, 24, 0.08);
  border-radius: 999px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: #F4F4F4;
}

.mode-switch a {
  border-radius: 999px;
  display: grid;
  place-items: center;
  color: #181818;
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
}

.mode-switch a.active {
  background: #FFFFFF;
  border: 1px solid rgba(24, 24, 24, 0.08);
}

.mobile-menu-button,
.debug-icon-button {
  min-height: 38px;
  border: 1px solid rgba(24, 24, 24, 0.10);
  border-radius: 999px;
  background: #FFFFFF;
  color: #181818;
  font-size: 0.8rem;
  font-weight: 850;
  cursor: pointer;
}

.mobile-menu-button {
  display: none;
  width: 40px;
  font-size: 1.05rem;
}

.debug-icon-button {
  justify-self: end;
  padding: 0 12px;
}

.debug-icon-button[aria-pressed="true"] {
  background: #181818;
  color: #FFFFFF;
}

.app-context-bar {
  display: none;
  padding-top: 8px;
}

body.debug-mode .app-context-bar {
  display: flex;
}

.main-panel {
  grid-template-rows: auto auto minmax(0, 1fr) auto;
  background: #FFFFFF;
}

.chat-stream {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding-top: 28px;
}

.message {
  width: min(100%, 920px);
}

.message-body,
.mini-card,
.job-board-header,
.job-card,
.delivery-panel-header,
.delivery-card,
.media-inline-card,
.composer,
.attachment-preview-card,
.markdown-table-wrap {
  box-shadow: none !important;
}

.composer-dock,
body.debug-mode .composer-dock,
body:not(.debug-mode) .composer-dock {
  background: #FFFFFF;
}

.composer {
  border-color: rgba(24, 24, 24, 0.16);
}

.mobile-sidebar-backdrop {
  display: none;
}

.studio-main-panel {
  grid-template-rows: auto minmax(0, 1fr);
}

.studio-blank-surface {
  min-height: 0;
  display: grid;
  place-items: center;
  background: #FFFFFF;
}

.studio-placeholder {
  width: min(760px, 62vw);
  min-height: min(320px, 42vh);
  border-radius: 48px;
  background: #FFFFFF;
}

@media (max-width: 980px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .mobile-menu-button {
    display: inline-grid;
    place-items: center;
  }

  .route-navbar {
    grid-template-columns: 44px minmax(0, 1fr) 74px;
    padding-inline: 16px;
    position: relative;
    z-index: 60;
  }

  .debug-icon-button {
    padding: 0 10px;
    font-size: 0.72rem;
  }

  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: min(320px, 86vw);
    height: 100dvh;
    max-height: 100dvh;
    border-right: 1px solid var(--color-border);
    border-bottom: 0;
    transform: translateX(-105%);
    transition: transform 180ms ease;
    z-index: 110;
    box-shadow: none;
  }

  body.sidebar-open .sidebar {
    transform: translateX(0);
  }

  body.sidebar-open .mobile-sidebar-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(24, 24, 24, 0.18);
    z-index: 100;
  }

  .main-panel {
    height: 100dvh;
    max-height: 100dvh;
    overflow: hidden;
  }

  .chat-stream {
    padding-top: 18px;
  }
}

@media (max-width: 640px) {
  .mode-switch {
    min-height: 40px;
  }

  .mode-switch a {
    font-size: 0.88rem;
  }

  .route-navbar {
    grid-template-columns: 40px minmax(0, 1fr) 66px;
    gap: 8px;
  }

  .debug-icon-button {
    min-height: 34px;
    font-size: 0.68rem;
  }
}

/* M4.9.6.21 — Frontend shell polish: centered mode switch, eager upload status, round send action. */
:root {
  --shadow-panel: none;
}

.sidebar {
  background: #FFFFFF;
}

.sidebar-section a {
  padding: 8px 0;
  font-size: 0.92rem;
  border-bottom: 0;
}

.sidebar-nav-item {
  min-height: 0;
  border: 0;
  border-radius: 12px;
  padding: 8px 10px;
  gap: 10px;
  font-size: 0.94rem;
  font-weight: 620;
}

.route-navbar {
  grid-template-columns: 88px minmax(180px, 1fr) 88px;
}

.mode-switch {
  width: 180px;
  min-width: 180px;
  justify-self: center;
  margin-inline: auto;
}

.send-button,
body.debug-mode #composerForm .send-button,
body:not(.debug-mode) #composerForm .send-button,
#composerForm .send-button {
  width: 41px;
  min-width: 41px !important;
  height: 41px;
  padding: 0;
  border-radius: 999px;
  display: inline-grid !important;
  place-items: center;
  justify-self: end;
  white-space: normal;
}

.send-button i {
  display: inline-grid;
  place-items: center;
  width: 1em;
  height: 1em;
  font-style: normal;
  font-size: 1.05rem;
  line-height: 1;
}

.send-button:disabled {
  cursor: not-allowed;
  opacity: 0.46 !important;
}

.attachment-preview-card[data-upload-status="uploading"],
.attachment-preview-card[data-upload-status="queued"] {
  border-color: rgba(24, 24, 24, 0.24);
}

.attachment-preview-card[data-upload-status="failed"] {
  border-color: rgba(24, 24, 24, 0.42);
  background: repeating-linear-gradient(135deg, rgba(24,24,24,0.035), rgba(24,24,24,0.035) 8px, #FFFFFF 8px, #FFFFFF 16px);
}

.attachment-preview-thumb {
  position: relative;
}

.attachment-upload-overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 4px;
  background: rgba(24, 24, 24, 0.54);
  color: #FFFFFF;
  font-size: 0.66rem;
  font-weight: 850;
  backdrop-filter: blur(2px);
}

.attachment-upload-spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.34);
  border-top-color: #FFFFFF;
  border-radius: 999px;
  animation: chronosAttachmentUploadSpin 800ms linear infinite;
}

.attachment-upload-progress {
  line-height: 1;
}

@keyframes chronosAttachmentUploadSpin {
  to { transform: rotate(360deg); }
}

@media (prefers-reduced-motion: reduce) {
  .attachment-upload-spinner { animation: none; }
}

.message-supplements .event-card,
.message-supplements .media-inline-card {
  margin-top: 0;
  max-width: 70%;
}

@media (max-width: 980px) {
  .route-navbar {
    grid-template-columns: 44px minmax(180px, 1fr) 74px;
  }
}

@media (max-width: 704px) {
  #composerForm.composer,
  body.debug-mode #composerForm.composer,
  body:not(.debug-mode) #composerForm.composer {
    grid-template-columns: 48px minmax(0, 1fr) 56px !important;
    grid-template-areas: "attachment-picker composer-stack composer-send" !important;
  }

  #composerForm .send-button,
  body.debug-mode #composerForm .send-button,
  body:not(.debug-mode) #composerForm .send-button {
    width: 41px;
    min-width: 41px !important;
    height: 41px;
  }

  .message-supplements .event-card,
  .message-supplements .media-inline-card {
    width: 100% !important;
    max-width: 100%;
  }
}

@media (max-width: 430px) {
  .route-navbar {
    grid-template-columns: 40px minmax(160px, 1fr) 58px;
  }

  .mode-switch {
    width: 168px;
    min-width: 168px;
  }

  #composerForm.composer,
  body.debug-mode #composerForm.composer,
  body:not(.debug-mode) #composerForm.composer {
    column-gap: 8px !important;
  }
}


/* M4.9.6.21 — Markdown surface CSS polish and compact send action. */
.markdown-content .markdown-list,
.markdown-list {
  margin: 11px 0px;
}
.send-button,
body.debug-mode #composerForm .send-button,
body:not(.debug-mode) #composerForm .send-button,
#composerForm .send-button {
  width: 41px;
  min-width: 41px !important;
  height: 41px;
  padding: 0;
  border-radius: 999px;
  display: inline-grid !important;
  place-items: center;
  justify-self: end;
  white-space: normal;
}

/* M4.9.6.39 — Live Task Placeholder & Progress Events */
.task-progress-events {
  margin-top: 10px;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: 14px;
  background: #fff;
  color: var(--color-muted);
  font-size: 0.88rem;
}

.task-progress-title {
  margin: 0 0 6px;
  color: var(--color-muted);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.task-progress-events ul {
  margin: 0;
  padding-left: 18px;
}

.task-progress-events li {
  margin: 5px 0;
}

.message[data-task-status="completed"] .task-progress-events,
.message[data-task-status="failed"] .task-progress-events,
.message[data-task-status="canceled"] .task-progress-events {
  display: none;
}