shell.css

/* App shell: sidebar, mobile bar, command palette, activity tray, toast. */
.hf-shell {
  display: flex;
  min-height: 100dvh;
  background: var(--hf-bg);
}
.hf-skip {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 100;
  padding: 8px 12px;
  border-radius: var(--hf-radius);
  background: var(--hf-ink);
  color: var(--hf-on-ink);
  transform: translateY(-200%);
}
.hf-skip:focus {
  transform: none;
}

/* Sidebar */
.hf-sidebar {
  position: sticky;
  top: 0;
  flex: none;
  width: var(--hf-sidebar-width);
  height: 100dvh;
  border-right: 1px solid var(--hf-border);
  background: var(--hf-sidebar);
  transition: width 180ms var(--hf-ease);
  z-index: 20;
}
.hf-shell.is-collapsed .hf-sidebar {
  width: var(--hf-sidebar-collapsed);
}
.hf-sidebar-inner {
  display: flex;
  flex-direction: column;
  gap: 6px;
  height: 100%;
  padding: 16px 10px 12px;
  overflow-y: auto;
  overflow-x: hidden;
}
.hf-brand-row {
  display: flex;
  align-items: center;
  gap: 2px;
  min-height: 32px;
  padding: 0 2px 0 6px;
  margin-bottom: 6px;
}
.hf-brand {
  margin-right: auto;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
  color: var(--hf-text);
  text-decoration: none;
}
.hf-brand-name {
  font-size: 17px;
  font-weight: 650;
  letter-spacing: -0.8px;
  white-space: nowrap;
}
.hf-brand-name span {
  font-weight: 400;
}
.hf-collapse,
.hf-search-button {
  color: var(--hf-faint);
}
.hf-sidebar-inner.is-collapsed .hf-brand-row {
  flex-direction: column;
  padding: 0;
}
.hf-sidebar-inner.is-collapsed .hf-brand-name {
  display: none;
}

/* Workspace switcher */
.hf-switcher,
.hf-switcher-trigger {
  width: 100%;
}
.hf-switcher-trigger {
  gap: 9px;
  padding: 6px;
  border: 1px solid var(--hf-border);
  border-radius: var(--hf-radius);
  background: var(--hf-raised);
  box-shadow: var(--hf-shadow-1);
  text-align: left;
}
.hf-switcher-trigger:hover {
  border-color: var(--hf-border-strong);
}
.hf-ws-mark,
.hf-avatar {
  flex: none;
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 7px;
  background: var(--hf-accent-soft);
  color: var(--hf-accent-text);
  font-size: var(--hf-text-sm);
  font-weight: 650;
}
.hf-avatar {
  border-radius: 50%;
  background: var(--hf-ink);
  color: var(--hf-on-ink);
  font-size: var(--hf-text-xs);
}
.hf-switcher-text,
.hf-user-text {
  display: grid;
  flex: 1;
  min-width: 0;
  line-height: 1.25;
}
.hf-switcher-text strong,
.hf-user-text strong {
  overflow: hidden;
  color: var(--hf-text);
  font-size: var(--hf-text-base);
  font-weight: 600;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.hf-switcher-text small,
.hf-user-text small {
  overflow: hidden;
  color: var(--hf-muted);
  font-size: var(--hf-text-xs);
  text-overflow: ellipsis;
  white-space: nowrap;
}
.hf-switcher-chevron {
  flex: none;
  color: var(--hf-faint);
}
.hf-switcher .hf-menu-popover {
  min-width: max(240px, var(--hf-menu-trigger-width, 0px));
}
.hf-sidebar-inner.is-collapsed .hf-switcher-trigger {
  justify-content: center;
  padding: 5px;
}
.hf-sidebar-inner.is-collapsed .hf-switcher-text,
.hf-sidebar-inner.is-collapsed .hf-switcher-chevron {
  display: none;
}

.hf-palette kbd {
  margin-left: auto;
  padding: 1px 5px;
  border: 1px solid var(--hf-border);
  border-radius: 4px;
  background: var(--hf-raised);
  color: var(--hf-muted);
  font-family: var(--hf-font-sans);
  font-size: var(--hf-text-xs);
}

/* Navigation */
.hf-nav {
  display: flex;
  flex: 1;
  flex-direction: column;
  min-height: 0;
  /* A long chat history scrolls here, keeping the footer in view. The
     gutter leaves room for focus rings. */
  margin: 0 -4px;
  padding: 0 4px;
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
}
.hf-nav-list,
.hf-subnav {
  margin: 0;
  padding: 0;
  list-style: none;
}
.hf-nav-list {
  display: grid;
  /* Long chat titles shrink to an ellipsis instead of widening the list. */
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
}
.hf-nav-spacer {
  flex: 1;
  min-height: 16px;
}
.hf-nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 34px;
  padding: 0 10px;
  border-radius: var(--hf-radius);
  color: var(--hf-text-2);
  font-size: var(--hf-text-base);
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
}
.hf-nav-link svg {
  flex: none;
  color: var(--hf-muted);
}
.hf-nav-link:hover {
  background: var(--hf-hover);
  color: var(--hf-text);
}
.hf-nav-link.is-active {
  background: var(--hf-selected);
  color: var(--hf-text);
  font-weight: 600;
}
.hf-nav-link.is-active svg {
  color: var(--hf-accent-text);
}
.hf-subnav {
  position: relative;
  display: grid;
  gap: 1px;
  margin: 2px 0 6px 20px;
  padding-left: 12px;
  border-left: 1px solid var(--hf-border-strong);
}
.hf-subnav-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: var(--hf-radius-sm);
  color: var(--hf-muted);
  font-size: var(--hf-text-base);
  text-decoration: none;
}
.hf-subnav-link:hover {
  background: var(--hf-hover);
  color: var(--hf-text);
}
.hf-subnav-link.is-active {
  color: var(--hf-text);
  font-weight: 550;
}
.hf-subnav-link.is-active::before {
  content: "";
  position: absolute;
  left: -1px;
  width: 2px;
  height: 18px;
  margin-top: 1px;
  border-radius: 2px;
  background: var(--hf-accent);
}
.hf-nav-badge {
  min-width: 18px;
  height: 18px;
  margin-left: auto;
  padding: 0 5px;
  border-radius: var(--hf-radius-pill);
  background: var(--hf-accent-soft);
  color: var(--hf-accent-text);
  font-size: var(--hf-text-xs);
  font-weight: 650;
  line-height: 18px;
  text-align: center;
}
.hf-sidebar-inner.is-collapsed .hf-nav-link {
  position: relative;
  justify-content: center;
  padding: 0;
}
.hf-sidebar-inner.is-collapsed .hf-nav-badge {
  position: absolute;
  top: 3px;
  right: 6px;
  min-width: 15px;
  height: 15px;
  padding: 0 3px;
  font-size: 10px;
  line-height: 15px;
}
.hf-sidebar-inner.is-collapsed .hf-nav-text {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

/* Chat history under Analyst: every chat, newest first. Styled like the
   sub-navigation, a little more compact. */
.hf-nav-item--chats {
  position: relative;
}
.hf-nav-item--chats > .hf-nav-link {
  padding-right: 40px;
}
.hf-nav-action {
  position: absolute;
  top: 3px;
  right: 3px;
  color: var(--hf-faint);
}
.hf-nav-action:hover {
  background: var(--hf-hover);
  color: var(--hf-text);
}
.hf-nav-link.is-active + .hf-nav-action:hover {
  background: color-mix(in srgb, var(--hf-text) 7%, transparent);
}
.hf-chats {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 2px 0 8px 20px;
  padding-left: 12px;
  border-left: 1px solid var(--hf-border-strong);
}
.hf-chats ul {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.hf-chat-link {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  padding: 5px 8px;
  border-radius: var(--hf-radius-sm);
  color: var(--hf-muted);
  font-size: var(--hf-text-base);
  line-height: 1.35;
  text-decoration: none;
}
.hf-chat-link:hover {
  background: var(--hf-hover);
  color: var(--hf-text);
}
.hf-chat-link.is-active {
  color: var(--hf-text);
  font-weight: 550;
}
.hf-chat-link.is-active::before {
  content: "";
  position: absolute;
  left: -1px;
  width: 2px;
  height: 16px;
  border-radius: 2px;
  background: var(--hf-accent);
}
.hf-chat-title {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.hf-chat-dot {
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--hf-info);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--hf-info) 20%, transparent);
  animation: hf-pulse 1.6s ease-in-out infinite;
}
.hf-chats-note {
  margin: 0;
  padding: 5px 8px;
  color: var(--hf-faint);
  font-size: var(--hf-text-sm);
  line-height: 1.4;
}
.hf-chats-toggle {
  justify-self: start;
  padding: 4px 8px;
  border: 0;
  border-radius: var(--hf-radius-sm);
  background: none;
  color: var(--hf-muted);
  font: inherit;
  font-size: var(--hf-text-sm);
  font-weight: 500;
  cursor: pointer;
}
.hf-chats-toggle:hover {
  background: var(--hf-hover);
  color: var(--hf-text);
}
.hf-chats-note .hf-chats-toggle {
  padding: 0 2px;
  color: var(--hf-accent-text);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.hf-chats-skeleton {
  display: block;
  margin: 7px 8px;
}

/* Footer: account and settings */
.hf-sidebar-foot {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 6px;
  padding-top: 10px;
  border-top: 1px solid var(--hf-border);
}
.hf-user {
  flex: 1;
  min-width: 0;
}
.hf-user-trigger {
  width: 100%;
  gap: 9px;
  padding: 5px 6px;
  border-radius: var(--hf-radius);
  text-align: left;
}
.hf-user-trigger:hover {
  background: var(--hf-hover);
}
.hf-user .hf-menu-popover {
  min-width: 240px;
}
.hf-activity-trigger {
  position: relative;
  flex: none;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 0;
  border-radius: var(--hf-radius);
  background: none;
  color: var(--hf-muted);
  cursor: pointer;
}
.hf-activity-trigger:hover,
.hf-activity-trigger.is-open {
  background: var(--hf-hover);
  color: var(--hf-text);
}
.hf-activity-trigger.is-busy {
  color: var(--hf-info);
}
.hf-activity-trigger.is-busy svg {
  animation: hf-pulse 1.6s ease-in-out infinite;
}
.hf-activity-count {
  position: absolute;
  top: 2px;
  right: 1px;
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  border: 1px solid color-mix(in srgb, var(--hf-info) 45%, transparent);
  border-radius: var(--hf-radius-pill);
  background: var(--hf-info-soft);
  color: var(--hf-info-text);
  line-height: 14px;
  font-size: 10px;
  font-weight: 700;
  text-align: center;
}
.hf-activity-alert {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--hf-danger);
  box-shadow: 0 0 0 2px var(--hf-sidebar);
}
.hf-settings-link {
  flex: none;
  color: var(--hf-muted);
}
.hf-settings-link.is-active {
  background: var(--hf-sunken);
  color: var(--hf-text);
}
.hf-sidebar-inner.is-collapsed .hf-sidebar-foot {
  flex-direction: column;
}
.hf-sidebar-inner.is-collapsed .hf-user-trigger {
  justify-content: center;
  padding: 3px;
}

/* Main column */
.hf-main-col {
  display: flex;
  flex: 1;
  flex-direction: column;
  min-width: 0;
}
main.hf-main {
  flex: 1;
  width: 100%;
  max-width: none;
  min-height: 0;
  margin: 0;
  padding: 0;
}
main.hf-main:focus {
  outline: none;
}
.hf-mobile-bar {
  display: none;
}

/* Activity tray */
.hf-tray {
  position: fixed;
  left: calc(var(--hf-sidebar-width) + 10px);
  bottom: 12px;
  z-index: 50;
  display: flex;
  flex-direction: column;
  width: 400px;
  max-height: min(620px, calc(100dvh - 24px));
  border: 1px solid var(--hf-border);
  border-radius: var(--hf-radius-xl);
  background: var(--hf-raised);
  box-shadow: var(--hf-shadow-3);
  animation: hf-pop 160ms var(--hf-ease);
}
.hf-shell.is-collapsed .hf-tray {
  left: calc(var(--hf-sidebar-collapsed) + 10px);
}
.hf-tray:focus {
  outline: none;
}
.hf-tray-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 14px 14px 10px 16px;
  border-bottom: 1px solid var(--hf-border);
}
.hf-tray-head h2 {
  margin: 0;
  color: var(--hf-text);
  font-family: var(--hf-font-sans);
  font-size: var(--hf-text-md);
  font-weight: 600;
  letter-spacing: 0;
}
.hf-tray-head p {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 3px 0 0;
  color: var(--hf-muted);
  font-size: var(--hf-text-sm);
}
.hf-live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--hf-faint);
}
.hf-live-dot.is-on {
  background: var(--hf-success);
  animation: hf-pulse 2s ease-in-out infinite;
}
.hf-tray-body {
  flex: 1;
  padding: 6px 8px;
  overflow-y: auto;
}
.hf-tray-body section + section {
  margin-top: 6px;
}
.hf-tray-body h3 {
  margin: 8px 8px 4px;
  color: var(--hf-muted);
  font-size: var(--hf-text-xs);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.hf-tray-body ul {
  margin: 0;
  padding: 0;
  list-style: none;
}
.hf-tray-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px;
  border-radius: var(--hf-radius);
  color: var(--hf-text);
  text-decoration: none;
}
.hf-tray-row:hover {
  background: var(--hf-hover);
}
.hf-tray-icon {
  flex: none;
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: var(--hf-radius);
  background: var(--hf-sunken);
  color: var(--hf-text-2);
}
.hf-tray-text {
  display: grid;
  flex: 1;
  min-width: 0;
}
.hf-tray-text strong {
  overflow: hidden;
  font-size: var(--hf-text-base);
  font-weight: 500;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.hf-tray-text small {
  overflow: hidden;
  color: var(--hf-muted);
  font-size: var(--hf-text-sm);
  text-overflow: ellipsis;
  white-space: nowrap;
}
.hf-tray-text em {
  color: var(--hf-danger-text);
  font-style: normal;
}
.hf-tray-foot {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 11px;
  border-top: 1px solid var(--hf-border);
  color: var(--hf-text-2);
  font-size: var(--hf-text-base);
  font-weight: 500;
  text-decoration: none;
}
.hf-tray-foot:hover {
  background: var(--hf-hover);
  border-radius: 0 0 var(--hf-radius-xl) var(--hf-radius-xl);
}

/* Command palette */
.hf-palette {
  width: min(640px, calc(100vw - 24px));
  max-width: none;
  max-height: none;
  margin: 12vh auto auto;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--hf-text);
  overflow: visible;
}
.hf-palette::backdrop {
  background: var(--hf-overlay);
  backdrop-filter: blur(2px);
}
.hf-palette-card {
  display: flex;
  flex-direction: column;
  max-height: min(560px, 76dvh);
  border: 1px solid var(--hf-border);
  border-radius: var(--hf-radius-xl);
  background: var(--hf-raised);
  box-shadow: var(--hf-shadow-3);
  overflow: hidden;
  animation: hf-pop 150ms var(--hf-ease);
  font-family: var(--hf-font-sans);
}
.hf-palette-input {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 16px;
  border-bottom: 1px solid var(--hf-border);
  color: var(--hf-muted);
}
.hf-palette-input input {
  flex: 1;
  height: 54px;
  border: 0;
  outline: none;
  background: transparent;
  color: var(--hf-text);
  font: inherit;
  font-size: var(--hf-text-lg);
}
.hf-palette-input input:focus-visible {
  outline: none;
}
.hf-palette-list {
  flex: 1;
  padding: 6px;
  overflow-y: auto;
}
.hf-palette-group {
  padding: 10px 10px 4px;
  color: var(--hf-muted);
  font-size: var(--hf-text-xs);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.hf-palette-option {
  display: flex;
  align-items: center;
  gap: 11px;
  min-height: 38px;
  padding: 6px 10px;
  border-radius: var(--hf-radius);
  color: var(--hf-text);
  font-size: var(--hf-text-md);
  cursor: pointer;
}
.hf-palette-option > svg:first-child {
  flex: none;
  color: var(--hf-muted);
}
.hf-palette-option.is-active {
  background: var(--hf-selected);
}
.hf-palette-option.is-active > svg:first-child {
  color: var(--hf-accent-text);
}
.hf-palette-title {
  flex: none;
  max-width: 60%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.hf-palette-subtitle {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  color: var(--hf-muted);
  font-size: var(--hf-text-sm);
  text-overflow: ellipsis;
  white-space: nowrap;
}
.hf-palette-option > svg:last-child {
  flex: none;
  margin-left: auto;
  color: var(--hf-muted);
}
.hf-palette-option .is-quiet {
  opacity: 0;
}
.hf-palette-option.is-disabled {
  color: var(--hf-muted);
  cursor: default;
}
.hf-palette-cancel {
  flex: none;
  height: 32px;
  padding: 0 10px;
  border: 0;
  border-radius: var(--hf-radius);
  background: none;
  color: var(--hf-text-2);
  font: inherit;
  font-size: var(--hf-text-md);
  cursor: pointer;
}
/* Touch devices get a tappable Cancel instead of keyboard hints. */
@media (hover: hover) {
  .hf-palette-cancel {
    display: none;
  }
}
@media (hover: none) {
  .hf-palette-esc {
    display: none;
  }
}
.hf-palette-empty {
  margin: 0;
  padding: 28px;
  color: var(--hf-muted);
  text-align: center;
}
.hf-palette-foot {
  display: flex;
  gap: 16px;
  padding: 9px 16px;
  border-top: 1px solid var(--hf-border);
  background: var(--hf-surface);
  color: var(--hf-muted);
  font-size: var(--hf-text-xs);
}
.hf-palette-foot span {
  display: inline-flex;
  align-items: center;
  gap: 3px;
}
.hf-palette-foot kbd {
  margin: 0;
}

/* Toast */
.hf-toast {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 90;
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: min(440px, calc(100vw - 32px));
  padding: 11px 12px 11px 16px;
  border-radius: var(--hf-radius-lg);
  background: var(--hf-ink);
  color: var(--hf-on-ink);
  box-shadow: var(--hf-shadow-3);
  font-size: var(--hf-text-base);
  animation: hf-pop 160ms var(--hf-ease);
}
.hf-toast.is-error {
  background: var(--hf-danger);
  color: var(--hf-on-danger);
}
.hf-toast button {
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border: 0;
  border-radius: var(--hf-radius-sm);
  background: transparent;
  color: inherit;
  opacity: 0.75;
  cursor: pointer;
}
.hf-toast button:hover {
  opacity: 1;
}

/* Full-page states outside the shell (loading, gate errors) */
.hf-center {
  display: grid;
  place-items: center;
  min-height: 100dvh;
  padding: 24px;
  background: var(--hf-bg);
  color: var(--hf-muted);
}
.hf-form-error {
  margin: 10px 0 0;
  color: var(--hf-danger-text);
  font-size: var(--hf-text-base);
}
.hf-form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: var(--hf-space-3);
}

/* Mobile */
.hf-nav-drawer.hf-dialog--drawer {
  margin: 0 auto 0 0;
  width: min(300px, 88vw);
}
.hf-nav-drawer .hf-dialog-card {
  border-width: 0 1px 0 0;
  background: var(--hf-sidebar);
}
.hf-nav-drawer .hf-dialog-body {
  height: 100%;
  padding: 0;
}
@media (max-width: 800px) {
  .hf-sidebar {
    display: none;
  }
  .hf-mobile-bar {
    position: sticky;
    top: 0;
    z-index: 30;
    display: flex;
    align-items: center;
    gap: 6px;
    height: 52px;
    padding: 0 8px;
    border-bottom: 1px solid var(--hf-border);
    background: color-mix(in srgb, var(--hf-bg) 92%, transparent);
    backdrop-filter: blur(8px);
  }
  .hf-mobile-bar .hf-brand-name {
    font-size: 16px;
  }
  .hf-mobile-ws {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    color: var(--hf-muted);
    font-size: var(--hf-text-sm);
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .hf-tray,
  .hf-shell.is-collapsed .hf-tray {
    left: 8px;
    right: 8px;
    top: 60px;
    bottom: auto;
    width: auto;
    max-height: calc(100dvh - 72px);
  }
  .hf-palette {
    margin-top: 8px;
  }
  .hf-palette-foot {
    display: none;
  }
  .hf-palette-title {
    max-width: none;
    flex: 1;
  }
  .hf-palette-subtitle {
    display: none;
  }
  .hf-toast {
    right: 12px;
    left: 12px;
    bottom: 12px;
  }
}
.hf-gate-error {
  display: grid;
  justify-items: center;
  gap: 12px;
  color: var(--hf-text-2);
}
/* Headings that take focus after navigation need no ring. */
.hf-main h1[tabindex="-1"]:focus {
  outline: none;
}
.hf-sidebar-fallback {
  display: grid;
  gap: 2px;
  padding: 16px 10px;
}
.hf-sidebar-fallback a {
  padding: 8px 10px;
  border-radius: var(--hf-radius);
  color: var(--hf-text-2);
  font-size: var(--hf-text-base);
  text-decoration: none;
}
.hf-sidebar-fallback a:hover {
  background: var(--hf-hover);
}