@media (max-width: 1160px) {
  .topbar-brand-mark {
    display: block;
  }

  html {
    scroll-behavior: auto;
  }

  .app-shell {
    display: block;
    min-height: 100dvh;
  }

  .sidebar {
    position: fixed;
    top: auto;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 70;
    display: block;
    width: 100vw;
    height: calc(72px + env(safe-area-inset-bottom));
    padding: 0 0 env(safe-area-inset-bottom);
    overflow: visible;
    border-top: 1px solid var(--line-strong);
    border-right: 0;
    background: color-mix(in oklch, var(--rail) 94%, transparent);
    backdrop-filter: blur(16px);
  }

  .brand-lockup,
  .workspace-switcher,
  .nav-label,
  .sidebar-spacer,
  .sidebar-foot {
    display: none;
  }

  .primary-nav {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    height: 72px;
    gap: 0;
  }

  .nav-item {
    display: grid;
    grid-template-columns: 1fr;
    min-width: 0;
    min-height: 72px;
    justify-items: center;
    gap: 4px;
    padding: 10px 4px 7px;
    border: 0;
    border-top: 2px solid transparent;
    border-radius: 0;
    text-align: center;
  }

  .nav-item:hover {
    background: var(--panel-2);
    transform: none;
  }

  .nav-item.is-active {
    background: var(--mode-accent-soft);
    color: var(--text);
  }

  .nav-item.is-active::before {
    display: none;
  }

  .nav-item > svg {
    width: 18px;
    height: 18px;
  }

  .nav-item > span:not(.nav-count) {
    width: 100%;
    font-size: 9.5px;
  }

  .nav-count {
    position: absolute;
    top: 6px;
    right: calc(50% - 25px);
    display: grid;
    min-width: 16px;
    height: 16px;
    place-items: center;
    border-radius: var(--radius-pill);
    background: var(--mode-accent);
    color: var(--inset) !important;
    font-size: 8px;
  }

  .workbench {
    min-height: 100dvh;
  }

  .topbar {
    min-height: 58px;
    padding: 0 14px;
  }

  .eyebrow,
  .breadcrumb-separator {
    display: none;
  }

  .breadcrumb-current {
    font-size: 13px;
  }

  .api-status {
    max-width: 145px;
    padding: 0 8px;
  }

  .content-grid {
    display: block;
    min-height: calc(100dvh - 58px);
    padding-bottom: calc(84px + env(safe-area-inset-bottom));
  }

  .content-grid.inspector-collapsed {
    display: block;
  }

  .studio-column {
    padding: 22px 13px calc(34px + env(safe-area-inset-bottom));
  }

  .mode-heading {
    min-height: 60px;
    align-items: flex-start;
    margin-bottom: 16px;
  }

  .mode-heading h1 {
    font-size: 27px;
  }

  .chat-surface {
    height: clamp(420px, calc(100dvh - 190px), 720px);
  }

  .app-shell.chat-fullscreen .studio-column {
    padding: 8px;
  }

  .app-shell.image-fullscreen .studio-column,
  .app-shell.video-fullscreen .studio-column {
    padding: 8px;
  }

  .app-shell.chat-fullscreen #mode-chat .chat-surface {
    height: calc(100dvh - 16px);
  }

  .app-shell.chat-fullscreen #mode-chat .chat-messages {
    padding: 16px 12px 12px;
  }

  .app-shell.chat-fullscreen #mode-chat .message-content {
    font-size: 15px;
  }

  .app-shell.chat-fullscreen #mode-chat .composer > textarea {
    font-size: 15px;
  }

  .chat-messages {
    gap: 20px;
    padding: 20px 13px 14px;
  }

  .message-row {
    width: 100%;
  }

  .message-body,
  .message-row.user .message-body {
    max-width: 86%;
  }

  .prompt-suggestions {
    width: calc(100% - 20px);
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 10px;
    scrollbar-width: none;
  }

  .prompt-suggestions::-webkit-scrollbar {
    display: none;
  }

  .suggestion-chip {
    flex: 0 0 auto;
  }

  .composer {
    width: calc(100% - 20px);
    margin-bottom: 10px;
  }

  .composer-footer {
    padding-left: 8px;
  }

  .composer-tools {
    flex: 1 1 auto;
  }

  .composer-hint {
    max-width: 120px;
  }

  .send-button {
    width: 36px;
    flex: 0 0 36px;
    padding: 0;
  }

  .send-button span {
    display: none;
  }

  .studio-split {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .control-surface,
  .output-surface {
    min-height: 0;
  }

  .control-surface {
    min-height: 0;
  }

  .output-surface {
    min-height: 0;
  }

  .inspector {
    position: fixed;
    top: auto;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 80;
    display: none;
    width: 100%;
    height: auto;
    max-height: 82dvh;
    border-top: 1px solid var(--line-strong);
    border-right: 0;
    border-bottom: 0;
    border-left: 0;
    border-radius: 16px 16px 0 0;
    background: var(--panel);
    box-shadow: 0 -22px 60px oklch(0 0 0 / 0.45);
    transform: none;
  }

  .content-grid .inspector.is-mobile-open {
    display: block;
    width: 100%;
    overflow: visible;
    opacity: 1;
    transform: none;
  }

  .content-grid.inspector-collapsed .inspector:not(.is-mobile-open) {
    display: none;
    width: 100%;
    border-left: 0;
    opacity: 1;
    transform: none;
  }

  .inspector-head {
    min-height: 72px;
    padding: 16px 20px 13px;
  }

  .inspector-head h2 {
    font-size: 18px;
  }

  .inspector-content {
    max-height: calc(82dvh - 72px);
    padding: 0 20px 12px;
    overflow-y: auto;
  }

  .mobile-only {
    display: inline-grid !important;
  }

  .desktop-only {
    display: none !important;
  }

  .works-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }

  .work-card-body {
    padding: 10px;
  }

  .work-card-actions {
    flex-wrap: wrap;
  }

  .work-card-actions button {
    min-width: 0;
  }
}

@media (max-width: 560px) {
  .storage-policy-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .settings-connection-test {
    align-items: stretch;
    flex-direction: column;
  }

  .topbar-actions {
    gap: 5px;
  }

  .api-status {
    max-width: 104px;
  }

  .api-status-copy #api-status-text {
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .studio-column {
    padding-right: 12px;
    padding-left: 12px;
  }

  .mode-heading h1 {
    font-size: 24px;
  }

  .works-heading {
    flex-direction: column;
  }

  .works-heading-actions {
    width: 100%;
    justify-content: flex-start;
  }

  .surface-toolbar {
    padding-right: 11px;
    padding-left: 11px;
  }

  .surface-toolbar-title {
    min-width: 0;
  }

  #new-chat {
    width: 30px;
    padding: 0;
    overflow: hidden;
    font-size: 0;
  }

  #new-chat svg {
    width: 15px;
    height: 15px;
  }

  .control-surface > .field-block,
  .prompt-workbench,
  .image-mode-switch,
  .video-mode-switch,
  .reference-zone,
  .video-inputs {
    margin-right: 13px;
    margin-left: 13px;
  }

  .control-surface > .field-block {
    padding-right: 0;
    padding-left: 0;
  }

  .prompt-workbench {
    padding-top: 12px;
  }

  .control-footer {
    padding-right: 13px;
    padding-left: 13px;
  }

  .media-output,
  .video-job-output {
    padding: 16px;
  }

  .prompt-print-mini {
    grid-template-areas:
      "label"
      "text"
      "actions";
    grid-template-columns: minmax(0, 1fr);
  }

  .prompt-print-mini-actions {
    justify-content: flex-start;
  }

  .job-meta {
    grid-template-columns: 1fr 1fr;
  }

  .works-toolbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .works-storage-label {
    font-size: 8.5px;
  }

  .works-grid {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

  .work-card-title {
    font-size: 10.5px;
  }

  .work-card-meta {
    display: grid;
    gap: 3px;
  }

  .work-card-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .modal-panel {
    padding: 17px;
  }

  .modal-actions {
    align-items: stretch;
    flex-direction: column-reverse;
  }

  .modal-actions .primary-action {
    width: 100%;
  }
}

@media (max-width: 380px) {
  .topbar-brand-mark {
    width: 30px;
    height: 30px;
    flex-basis: 30px;
  }

  .nav-item > span:not(.nav-count) {
    font-size: 8.5px;
  }

  .message-avatar {
    width: 25px;
    height: 25px;
  }

  .message-body,
  .message-row.user .message-body {
    max-width: calc(100% - 36px);
  }
}

@media (max-width: 1160px) {
  .primary-nav {
    display: flex;
    width: 100%;
  }

  .nav-item {
    width: 100%;
    flex: 1 1 0;
  }

  .composer-footer {
    min-width: 0;
  }

  .composer-tools {
    min-width: 0;
    overflow: hidden;
  }

  .tool-button {
    min-width: 0;
    flex: 0 0 auto;
  }

  .composer-hint {
    min-width: 0;
  }

  .send-button {
    position: relative;
    z-index: 1;
    margin-left: auto;
  }
}

@media (max-width: 560px) {
  .topbar {
    gap: 7px;
  }

  .topbar-context {
    flex: 1 1 auto;
  }

  .topbar-actions {
    flex: 0 0 auto;
  }

  .api-status {
    width: auto;
    min-width: 66px;
    max-width: 90px;
    justify-content: flex-start;
    padding: 0 8px;
    border-radius: 8px;
  }

  .api-status-copy #api-status-text {
    display: none;
  }

  .api-status-copy .api-status-separator {
    display: none;
  }

  .topbar-actions > .icon-button {
    width: 32px;
    height: 32px;
  }

  .composer-footer {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 36px;
    gap: 7px;
  }

  .composer-tools {
    width: 100%;
  }

  .send-button {
    width: 36px;
    margin-left: 0;
  }
}

@media (min-width: 1161px) {
  .app-shell.sidebar-collapsed {
    grid-template-columns: 72px minmax(0, 1fr);
  }

  .app-shell.sidebar-collapsed .sidebar {
    width: 72px;
    overflow: visible;
    align-items: stretch;
    padding-right: 10px;
    padding-left: 10px;
  }

  .app-shell.sidebar-collapsed .brand-lockup {
    align-items: center;
    flex-direction: column;
    gap: 10px;
    padding-right: 0;
    padding-left: 0;
  }

  .app-shell.sidebar-collapsed .workspace-switcher {
    margin-top: 40px;
  }

  .app-shell.sidebar-collapsed .brand-main {
    display: block;
  }

  .app-shell.sidebar-collapsed .brand-copy,
  .app-shell.sidebar-collapsed .workspace-switcher > span:not(.status-light),
  .app-shell.sidebar-collapsed .workspace-switcher > svg,
  .app-shell.sidebar-collapsed .nav-label,
  .app-shell.sidebar-collapsed .nav-item > span:not(.nav-count),
  .app-shell.sidebar-collapsed .sidebar-foot {
    display: none;
  }

  .app-shell.sidebar-collapsed .workspace-switcher {
    justify-content: center;
    margin-right: 0;
    margin-left: 0;
    padding-right: 0;
    padding-left: 0;
    border-color: transparent;
    background: transparent;
  }

  .app-shell.sidebar-collapsed .nav-item {
    grid-template-columns: 1fr;
    justify-items: center;
    min-height: 48px;
    padding-right: 0;
    padding-left: 0;
  }

  .app-shell.sidebar-collapsed .nav-item::before {
    left: -10px;
  }

  .app-shell.sidebar-collapsed .nav-count {
    position: absolute;
    top: 4px;
    right: 4px;
  }

}

/* v2.18 响应式契约：平板侧栏、手机底栏、自然高度工作区。 */
@media (max-width: 1160px) {
  .mobile-only {
    display: inline-grid !important;
  }

  .desktop-only {
    display: none !important;
  }

  body .app-shell.chat-fullscreen #mobile-inspector-toggle,
  body .app-shell.image-fullscreen #mobile-inspector-toggle,
  body .app-shell.video-fullscreen #mobile-inspector-toggle {
    top: calc(14px + var(--safe-top));
    right: max(14px, var(--safe-right));
  }

  .topbar {
    min-height: calc(var(--mobile-topbar-height) + var(--safe-top));
    padding-top: var(--safe-top);
    padding-right: max(14px, var(--safe-right));
    padding-left: max(14px, var(--safe-left));
  }

  .studio-split,
  .app-shell.image-fullscreen #mode-image .studio-split,
  .app-shell.video-fullscreen #mode-video .studio-split {
    height: auto;
    min-height: 0;
    grid-template-columns: minmax(0, 1fr);
  }

  .control-surface,
  .output-surface {
    min-height: 0;
  }

  .control-surface {
    max-height: none;
  }

  .output-surface {
    min-block-size: min(52dvh, 440px);
  }

  .composer-footer,
  .composer-tools {
    min-width: 0;
  }

  .composer-tools {
    overflow: visible;
  }

  .mobile-inspector-backdrop {
    inset: 0;
  }

  .toast-region {
    right: max(14px, var(--safe-right));
    width: min(360px, calc(100vw - max(28px, var(--safe-right) + var(--safe-left))));
  }
}

@media (min-width: 768px) and (max-width: 1160px) {
  .app-shell {
    display: grid;
    min-height: 100dvh;
    grid-template-columns: var(--tablet-rail-width) minmax(0, 1fr);
  }

  .sidebar {
    position: fixed;
    z-index: 70;
    inset: 0 auto 0 0;
    display: block;
    width: var(--tablet-rail-width);
    height: 100dvh;
    padding: var(--safe-top) 9px var(--safe-bottom) max(9px, var(--safe-left));
    overflow: visible;
    border-top: 0;
    border-right: 1px solid var(--line-strong);
    background: color-mix(in oklch, var(--rail) 96%, transparent);
  }

  .primary-nav {
    display: flex;
    width: 100%;
    height: auto;
    flex-direction: column;
    gap: 8px;
    padding-top: 68px;
  }

  .nav-item {
    position: relative;
    display: grid;
    width: 100%;
    min-height: 52px;
    grid-template-columns: 1fr;
    justify-items: center;
    padding: 0;
    border: 1px solid transparent;
    border-radius: 9px;
  }

  .nav-item > span:not(.nav-count) {
    display: none;
  }

  .nav-item > svg {
    width: 19px;
    height: 19px;
  }

  .nav-count {
    top: 3px;
    right: 3px;
  }

  .workbench {
    min-width: 0;
    min-height: 100dvh;
    grid-column: 2;
  }

  .content-grid,
  .content-grid.inspector-collapsed {
    display: block;
    min-height: calc(100dvh - var(--mobile-topbar-height) - var(--safe-top));
    padding-bottom: 0;
  }

  .studio-column {
    padding: 22px clamp(16px, 2.8vw, 30px) 26px;
  }

  .chat-surface {
    height: clamp(460px, calc(100dvh - 176px - var(--safe-top)), 720px);
  }

  .inspector {
    position: fixed;
    z-index: 80;
    inset: 0 0 0 auto;
    display: flex;
    width: min(380px, calc(100vw - var(--tablet-rail-width)));
    height: 100dvh;
    max-height: none;
    flex-direction: column;
    overflow: hidden;
    visibility: hidden;
    border: 0;
    border-left: 1px solid var(--line-strong);
    border-radius: 16px 0 0 16px;
    opacity: 0;
    transform: translateX(100%);
    pointer-events: none;
  }

  .content-grid .inspector.is-mobile-open,
  .content-grid.inspector-collapsed .inspector.is-mobile-open {
    display: flex;
    width: min(380px, calc(100vw - var(--tablet-rail-width)));
    overflow: hidden;
    visibility: visible;
    opacity: 1;
    transform: translateX(0);
    pointer-events: auto;
  }

  .inspector-head {
    min-height: calc(72px + var(--safe-top));
    padding-top: calc(16px + var(--safe-top));
  }

  .inspector-content {
    min-height: 0;
    max-height: none;
    flex: 1 1 auto;
    padding-bottom: calc(18px + var(--safe-bottom));
    overflow-y: auto;
  }

  .mobile-inspector-backdrop {
    left: var(--tablet-rail-width);
  }

  .app-shell.chat-fullscreen .workbench,
  .app-shell.image-fullscreen .workbench,
  .app-shell.video-fullscreen .workbench {
    grid-column: 1;
  }

  .app-shell.chat-fullscreen .mobile-inspector-backdrop,
  .app-shell.image-fullscreen .mobile-inspector-backdrop,
  .app-shell.video-fullscreen .mobile-inspector-backdrop {
    left: 0;
  }

  .works-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .toast-region {
    bottom: calc(18px + var(--safe-bottom));
  }
}

@media (min-width: 960px) and (max-width: 1160px) {
  .studio-split,
  .app-shell.image-fullscreen #mode-image .studio-split,
  .app-shell.video-fullscreen #mode-video .studio-split {
    height: clamp(500px, calc(100dvh - 170px - var(--safe-top)), 760px);
    grid-template-columns: minmax(300px, 0.82fr) minmax(0, 1.18fr);
  }

  .app-shell.image-fullscreen #mode-image .studio-split,
  .app-shell.video-fullscreen #mode-video .studio-split {
    height: calc(100dvh - 16px - var(--safe-top) - var(--safe-bottom));
  }
}

@media (max-width: 767px) {
  .settings-backdrop {
    padding: 0;
  }

  .settings-panel {
    width: 100%;
    height: 100dvh;
    max-height: 100dvh;
    padding: calc(16px + var(--safe-top)) max(16px, var(--safe-right)) calc(18px + var(--safe-bottom)) max(16px, var(--safe-left));
    border: 0;
    border-radius: 0;
    overscroll-behavior: contain;
  }

  .settings-tabs {
    position: sticky;
    z-index: 2;
    top: calc(-16px - var(--safe-top));
    margin-right: calc(-1 * max(16px, var(--safe-right)));
    margin-left: calc(-1 * max(16px, var(--safe-left)));
    padding: calc(8px + var(--safe-top)) max(16px, var(--safe-right)) 8px max(16px, var(--safe-left));
    border-width: 0 0 1px;
    background: var(--panel);
  }

  .app-shell {
    display: block;
  }

  .sidebar {
    inset: auto 0 0;
    width: 100%;
    height: calc(var(--mobile-nav-height) + var(--safe-bottom));
    padding: 0 var(--safe-right) var(--safe-bottom) var(--safe-left);
  }

  .primary-nav {
    width: 100%;
    height: var(--mobile-nav-height);
  }

  .nav-item {
    min-height: var(--mobile-nav-height);
  }

  .content-grid,
  .content-grid.inspector-collapsed {
    padding-bottom: calc(var(--mobile-nav-height) + var(--safe-bottom) + 12px);
  }

  .studio-column {
    padding: 20px max(12px, var(--safe-right)) 24px max(12px, var(--safe-left));
  }

  .chat-surface {
    height: calc(100dvh - var(--mobile-topbar-height) - var(--mobile-nav-height) - 126px - var(--safe-top) - var(--safe-bottom));
    min-height: 280px;
    max-height: 720px;
  }

  .app-shell.chat-fullscreen .studio-column,
  .app-shell.image-fullscreen .studio-column,
  .app-shell.video-fullscreen .studio-column {
    padding: calc(8px + var(--safe-top)) max(8px, var(--safe-right)) calc(8px + var(--safe-bottom)) max(8px, var(--safe-left));
  }

  .app-shell.chat-fullscreen #mode-chat .chat-surface {
    height: calc(100dvh - 16px - var(--safe-top) - var(--safe-bottom));
    min-height: 0;
  }

  .output-surface {
    min-block-size: min(58dvh, 440px);
  }

  .inspector {
    position: fixed;
    z-index: 80;
    inset: auto 0 0;
    display: none;
    width: 100%;
    height: auto;
    max-height: min(88dvh, 760px);
    flex-direction: column;
    overflow: hidden;
    border: 0;
    border-top: 1px solid var(--line-strong);
    border-radius: 16px 16px 0 0;
    opacity: 1;
    transform: translateY(100%);
  }

  .content-grid .inspector.is-mobile-open,
  .content-grid.inspector-collapsed .inspector.is-mobile-open {
    display: flex;
    width: 100%;
    overflow: hidden;
    transform: translateY(0);
  }

  .inspector-head {
    min-height: 68px;
    padding: 14px max(18px, var(--safe-right)) 12px max(18px, var(--safe-left));
  }

  .inspector-content {
    min-height: 0;
    max-height: calc(88dvh - 68px);
    padding: 0 max(18px, var(--safe-right)) calc(18px + var(--safe-bottom)) max(18px, var(--safe-left));
    overflow-y: auto;
    overscroll-behavior: contain;
  }

  .reference-zone-heading,
  .video-ref-head {
    flex-wrap: wrap;
  }

  .reference-heading-actions {
    min-width: 0;
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .reference-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .video-ref-pair {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .video-ref-empty-actions {
    flex-wrap: wrap;
    gap: 7px;
  }

  .composer-tools {
    flex-wrap: wrap;
    row-gap: 4px;
  }

  .works-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .toast-region {
    bottom: calc(var(--mobile-nav-height) + var(--safe-bottom) + 12px);
  }

  .modal-backdrop {
    align-items: flex-start;
    padding: calc(16px + var(--safe-top)) max(12px, var(--safe-right)) calc(16px + var(--safe-bottom)) max(12px, var(--safe-left));
  }

  .modal-panel {
    max-height: calc(100dvh - 32px - var(--safe-top) - var(--safe-bottom));
  }
}

@media (max-width: 430px) {
  .topbar-context .eyebrow,
  .topbar-context .breadcrumb-separator { display: none; }

  .topbar-actions #settings-button { display: none; }

  .topbar {
    gap: 7px;
  }

  .topbar-context {
    flex: 1 1 auto;
  }

  .topbar-actions {
    flex: 0 0 auto;
    gap: 5px;
  }

  .api-status {
    width: auto;
    min-width: 66px;
    max-width: 90px;
    justify-content: flex-start;
    padding: 0 8px;
    border-radius: 8px;
  }

  .api-status-copy #api-status-text,
  .api-status-copy .api-status-separator,
  .composer-tools > .composer-hint:not(.thinking-hint) {
    display: none;
  }

  .mode-heading h1 {
    font-size: 23px;
  }

  .surface-toolbar {
    gap: 7px;
    padding-right: 10px;
    padding-left: 10px;
  }

  #new-chat {
    width: 34px;
    padding: 0;
    overflow: hidden;
    font-size: 0;
  }

  .control-surface > .field-block,
  .prompt-workbench,
  .image-mode-switch,
  .video-mode-switch,
  .reference-zone,
  .video-inputs {
    margin-right: 12px;
    margin-left: 12px;
  }

  .control-surface > .field-block {
    padding-right: 0;
    padding-left: 0;
  }

  .control-footer {
    padding-right: 12px;
    padding-left: 12px;
  }

  .reference-zone-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .reference-heading-actions {
    width: 100%;
    justify-content: flex-start;
  }

  .reference-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .video-ref-pair {
    grid-template-columns: minmax(0, 1fr);
  }

  .video-ref-empty-actions {
    display: grid;
    width: 100%;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .video-ref-source {
    min-width: 0;
    justify-content: center;
    padding-right: 7px;
    padding-left: 7px;
  }

  .composer-footer {
    grid-template-columns: minmax(0, 1fr) 44px;
  }

  .send-button {
    width: 44px;
    flex-basis: 44px;
  }

  .job-meta {
    grid-template-columns: 1fr 1fr;
  }

  .works-toolbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .works-heading-actions {
    display: grid;
    width: 100%;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px;
  }

  .works-heading-actions .text-button {
    min-width: 0;
    justify-content: center;
  }

  .works-heading-actions .danger-button {
    grid-column: 1 / -1;
  }

  .works-import-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .works-heading {
    flex-direction: column;
  }

  .works-heading-actions {
    width: 100%;
    justify-content: flex-start;
  }

  .works-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .work-card-title {
    font-size: 12px;
  }

  .work-card-meta {
    display: flex;
  }

  .modal-panel {
    padding: 16px;
  }

  .modal-actions {
    align-items: stretch;
    flex-direction: column-reverse;
  }

  .modal-actions .primary-action,
  .modal-actions .text-button {
    width: 100%;
  }

  .picker-actions {
    align-items: stretch;
    flex-direction: column;
  }
}

@media (hover: none), (pointer: coarse) {
  .icon-button,
  .icon-button.small,
  .text-button,
  .tool-button,
  .send-button,
  .primary-action,
  .segment-button,
  .choice-button,
  .filter-tab,
  .style-preset,
  .prompt-tool-button,
  .work-card-actions button,
  .video-ref-source,
  .video-refresh-button,
  .stop-button,
  .picker-anim-btn {
    min-height: var(--touch-target);
  }

  .icon-button,
  .icon-button.small,
  .picker-anim-btn {
    width: var(--touch-target);
    height: var(--touch-target);
  }

  .topbar-actions > .icon-button,
  .send-button {
    width: var(--touch-target);
    height: var(--touch-target);
  }

  .send-button {
    flex-basis: var(--touch-target);
  }

  #new-chat {
    width: var(--touch-target);
  }

  .media-ref-remove,
  .work-picker-preview {
    width: var(--touch-target);
    height: var(--touch-target);
  }

  .composer-footer {
    grid-template-columns: minmax(0, 1fr) var(--touch-target);
  }

  .work-card:hover,
  .work-picker-card:hover,
  .prompt-tool-button:hover,
  .video-ref-source:hover,
  .icon-button:hover {
    transform: none;
  }
}

@media (max-width: 1160px) and (hover: none), (max-width: 1160px) and (pointer: coarse) {
  .reference-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-height: 600px) {
  .modal-backdrop {
    place-items: start center;
  }

  .work-picker-panel {
    overflow-y: auto;
  }

  .work-picker-grid {
    min-height: min(220px, 42dvh);
    max-height: none;
    flex: 0 0 auto;
  }
}

@media (max-width: 767px) and (max-height: 600px) and (orientation: landscape) {
  :root {
    --mobile-nav-height: 56px;
  }

  .nav-item {
    min-height: var(--mobile-nav-height);
    padding: 7px 4px;
  }

  .nav-item > span:not(.nav-count) {
    display: none;
  }

  .studio-column {
    padding-top: 10px;
    padding-bottom: 14px;
  }

  #mode-chat > .mode-heading,
  #mode-image > .mode-heading,
  #mode-video > .mode-heading {
    display: none;
  }

  .chat-surface {
    height: calc(100dvh - var(--mobile-topbar-height) - var(--mobile-nav-height) - var(--safe-top) - var(--safe-bottom) - 20px);
    min-height: 220px;
  }

  .output-surface {
    min-block-size: 240px;
  }

  .inspector {
    max-height: 100dvh;
  }

  .inspector-content {
    max-height: calc(100dvh - 64px);
  }
}

@media (min-width: 768px) and (max-width: 1160px) and (max-height: 600px) and (orientation: landscape) {
  .studio-column {
    padding-top: 10px;
    padding-bottom: 12px;
  }

  #mode-chat > .mode-heading,
  #mode-image > .mode-heading,
  #mode-video > .mode-heading {
    display: none;
  }

  .studio-split,
  .app-shell.image-fullscreen #mode-image .studio-split,
  .app-shell.video-fullscreen #mode-video .studio-split {
    height: calc(100dvh - var(--mobile-topbar-height) - var(--safe-top) - 22px);
    min-height: 260px;
    grid-template-columns: minmax(280px, 0.82fr) minmax(0, 1.18fr);
  }

  .chat-surface {
    height: calc(100dvh - var(--mobile-topbar-height) - var(--safe-top) - 22px);
    min-height: 260px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media (max-width: 1160px) {
  .topbar-actions #workspace-button,
  .topbar-actions #help-button { display: inline-grid; }
}

@media (max-width: 640px) {
  .prompt-showcase { margin-right: 12px; margin-left: 12px; padding: 12px; }
  .prompt-showcase-head h2 { font-size: 17px; }
  .prompt-showcase-head p { max-width: 230px; }
  .prompt-showcase-gallery { gap: 10px; margin-top: 10px; padding: 10px 7px 13px; scroll-padding-inline: calc(50% - 56px); }
  .prompt-example-card { width: 112px; min-width: 112px; }
  .help-layout { grid-template-columns: 1fr; gap: 12px; }
  .help-toc { display: flex; overflow-x: auto; padding-bottom: 3px; }
  .help-toc button { flex: 0 0 auto; white-space: nowrap; }
  .storage-data-toolbar { grid-template-columns: 1fr; }
  .workspace-menu-grid { grid-template-columns: 1fr; }
}