/*
 * Atelier for the web: the components of the gpui kit, drawn with CSS.
 *
 * Every value comes from a token in generated/tokens.css, which is written from the Rust theme,
 * so a page looks like the native app in each of the six themes. Pick one with
 * `<html data-theme="glass-dark">`; Glass Dark is the default. Nothing here names a colour.
 *
 * Class names follow the Rust components: `.at-button` is `Button`, `.at-segmented` is
 * `SegmentedControl`, and a modifier such as `.at-button--primary` is a builder call.
 */

@import url("generated/tokens.css");

/* ---------------------------------------------------------------- base */

:root {
  color-scheme: var(--at-color-scheme);
}

[data-theme] {
  color-scheme: var(--at-color-scheme);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

.at-root,
body.at-root {
  margin: 0;
  font-family: var(--at-font-ui);
  font-size: var(--at-size-md);
  line-height: 1.4;
  color: var(--at-text);
  background: var(--at-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* Under a Tauri window with vibrancy the desktop shows through: the chrome is the only tint. */
html[data-vibrancy] body.at-root {
  background: transparent;
}

.at-root ::selection {
  background: var(--at-selection);
}

.at-root :focus {
  outline: none;
}

/* The focus ring sits a gap outside the control, following its radius, as `focusable` draws it. */
.at-root :focus-visible {
  outline: 2px solid var(--at-focus-ring);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .at-root * {
    transition-duration: 0ms !important;
    animation-duration: 0ms !important;
  }
}

.at-icon {
  display: inline-flex;
  flex: none;
  width: 15px;
  height: 15px;
}

.at-icon svg {
  width: 100%;
  height: 100%;
}

/* ---------------------------------------------------------------- text */

.at-title {
  font-size: var(--at-size-xl);
  font-weight: var(--at-heading-weight);
  margin: 0;
}

.at-heading {
  font-size: var(--at-size-lg);
  font-weight: var(--at-heading-weight);
  margin: 0;
}

.at-muted {
  color: var(--at-text-muted);
}

.at-faint {
  color: var(--at-text-faint);
}

.at-small {
  font-size: var(--at-size-sm);
}

/* A section title in a sidebar or inspector, in sentence case as written, as `Label::caption`. */
.at-caption {
  font-size: var(--at-size-sm);
  font-weight: 500;
  color: var(--at-text-muted);
}

.at-mono {
  font-family: var(--at-font-mono);
  font-variant-numeric: tabular-nums;
}

.at-display {
  font-family: var(--at-font-mono);
  font-size: var(--at-size-display);
  font-variant-numeric: tabular-nums;
}

/* ---------------------------------------------------------------- window frame */

/* The whole window: title bar, then a row of sidebar, content and inspector, then status bar. */
.at-window {
  display: flex;
  flex-direction: column;
  height: 100vh;
  min-height: 0;
  overflow: hidden;
}

.at-window__body {
  display: flex;
  flex: 1;
  min-height: 0;
}

/* Translucent chrome blurs what lies behind it, as the native window does the desktop. */
.at-chrome {
  background: var(--at-chrome);
  -webkit-backdrop-filter: blur(var(--at-chrome-blur)) saturate(calc(1 + var(--at-translucent) * 0.7));
  backdrop-filter: blur(var(--at-chrome-blur)) saturate(calc(1 + var(--at-translucent) * 0.7));
}

.at-title-bar {
  display: flex;
  flex: none;
  align-items: center;
  gap: var(--at-space-sm);
  height: var(--at-title-bar);
  padding: 0 var(--at-space-md);
  border-bottom: 1px solid var(--at-border);
  font-size: var(--at-size-md);
  user-select: none;
  -webkit-user-select: none;
}

/* Tauri: the bar drags the window, its controls do not. */
.at-title-bar[data-tauri-drag-region] > * {
  -webkit-app-region: no-drag;
}

.at-title-bar__title {
  flex: 1;
  min-width: 0;
  text-align: center;
  font-weight: var(--at-heading-weight);
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.at-title-bar__side {
  display: flex;
  align-items: center;
  gap: var(--at-space-xs);
  flex: 1;
  min-width: 0;
}

.at-title-bar__side--end {
  justify-content: flex-end;
}

.at-toolbar {
  display: flex;
  flex: none;
  align-items: center;
  gap: var(--at-space-sm);
  height: var(--at-toolbar);
  padding: 0 var(--at-space-md);
  border-bottom: 1px solid var(--at-border);
}

.at-sidebar {
  display: flex;
  flex: none;
  flex-direction: column;
  min-height: 0;
  overflow-y: auto;
  border-right: 1px solid var(--at-border);
}

.at-sidebar--end {
  border-right: none;
  border-left: 1px solid var(--at-border);
}

.at-content {
  flex: 1;
  min-width: 0;
  min-height: 0;
  overflow: auto;
  background: var(--at-surface);
}

.at-status-bar {
  display: flex;
  flex: none;
  align-items: center;
  gap: var(--at-space-md);
  height: var(--at-status-bar);
  padding: 0 var(--at-space-md);
  border-top: 1px solid var(--at-border);
  font-size: var(--at-size-xs);
  color: var(--at-text-muted);
}

.at-spacer {
  flex: 1;
}

.at-divider {
  flex: none;
  align-self: stretch;
  width: 1px;
  margin: var(--at-space-xs) 0;
  background: var(--at-separator);
}

.at-divider--horizontal {
  width: auto;
  height: 1px;
  margin: 0;
}

/* ---------------------------------------------------------------- buttons */

.at-button {
  --_height: var(--at-control-md);
  --_fill: var(--at-button-secondary-fill);
  --_hover: var(--at-button-secondary-hover);
  --_pressed: var(--at-button-secondary-pressed);
  --_text: var(--at-button-secondary-text);
  --_border: var(--at-button-secondary-border);
  display: inline-flex;
  flex: none;
  align-items: center;
  justify-content: center;
  gap: calc(var(--at-space-sm) - var(--at-space-xxs));
  height: var(--_height);
  padding: 0 var(--at-control-padding);
  border: 1px solid var(--_border);
  border-radius: var(--at-control-md-radius);
  background: var(--_fill);
  color: var(--_text);
  font: inherit;
  font-size: var(--at-size-md);
  font-weight: var(--at-label-weight);
  line-height: 1;
  white-space: nowrap;
  cursor: default;
  transition: background-color var(--at-motion-fast) ease-out;
}

.at-button .at-icon {
  width: 15px;
  height: 15px;
}

/* An ordinary action is raised: top-lit where the direction has a bezel. */
.at-button:not([class*="at-button--"]),
.at-button--secondary {
  background: linear-gradient(180deg, var(--at-raised-top), var(--_fill));
  box-shadow: var(--at-raised-shadow);
}

.at-button:hover {
  background: var(--_hover);
}

.at-button:active {
  background: var(--_pressed);
}

.at-button--primary {
  --_fill: var(--at-button-primary-fill);
  --_hover: var(--at-button-primary-hover);
  --_pressed: var(--at-button-primary-pressed);
  --_text: var(--at-button-primary-text);
  --_border: transparent;
}

.at-button--ghost {
  --_fill: var(--at-button-ghost-fill);
  --_hover: var(--at-button-ghost-hover);
  --_pressed: var(--at-button-ghost-pressed);
  --_text: var(--at-button-ghost-text);
  --_border: transparent;
}

.at-button--danger {
  --_fill: var(--at-button-danger-fill);
  --_hover: var(--at-button-danger-hover);
  --_pressed: var(--at-button-danger-pressed);
  --_text: var(--at-button-danger-text);
  --_border: transparent;
}

.at-button--agent {
  --_fill: var(--at-button-agent-fill);
  --_hover: var(--at-button-agent-hover);
  --_pressed: var(--at-button-agent-pressed);
  --_text: var(--at-button-agent-text);
  --_border: var(--at-button-agent-border);
}

/* A latching button, latched: mute, solo, a toggled tool. */
.at-button[aria-pressed="true"] {
  --_fill: var(--at-button-selected-fill);
  --_hover: var(--at-button-selected-hover);
  --_text: var(--at-button-selected-text);
  --_border: var(--at-border);
  background: var(--_fill);
  box-shadow: none;
}

.at-button--sm {
  --_height: var(--at-control-sm);
  gap: var(--at-space-xs);
  padding: 0 calc(var(--at-control-padding) * 0.75);
  border-radius: var(--at-control-sm-radius);
  font-size: var(--at-size-sm);
}

.at-button--sm .at-icon {
  width: 13px;
  height: 13px;
}

.at-button--lg {
  --_height: var(--at-control-lg);
  padding: 0 calc(var(--at-control-padding) * 1.4);
  border-radius: var(--at-control-lg-radius);
}

.at-button--lg .at-icon {
  width: 17px;
  height: 17px;
}

.at-button--icon {
  width: var(--_height);
  padding: 0;
}

.at-button--full {
  width: 100%;
}

.at-button:disabled,
.at-button[aria-disabled="true"] {
  opacity: 0.45;
  pointer-events: none;
  box-shadow: none;
}

.at-button__after {
  opacity: 0.7;
}

/* ---------------------------------------------------------------- segmented control, tabs */

.at-segmented {
  display: inline-flex;
  flex: none;
  align-items: center;
  gap: 1px;
  height: var(--at-control-md);
  padding: 2px;
  border: 1px solid var(--at-border);
  border-radius: var(--at-control-md-radius);
  background: var(--at-sunken);
}

.at-segmented--sm {
  height: var(--at-control-sm);
  border-radius: var(--at-control-sm-radius);
}

.at-segmented > button {
  display: inline-flex;
  flex: none;
  align-items: center;
  justify-content: center;
  gap: 5px;
  height: 100%;
  min-width: calc(var(--at-control-md) - 4px);
  padding: 0 calc(var(--at-control-padding) * 0.8);
  border: 0;
  border-radius: max(0px, calc(var(--at-control-md-radius) - 2px));
  background: transparent;
  color: var(--at-text-muted);
  font: inherit;
  font-size: var(--at-size-sm);
  font-weight: var(--at-label-weight);
  white-space: nowrap;
  transition: background-color var(--at-motion-fast) ease-out;
}

.at-segmented--sm > button {
  border-radius: max(0px, calc(var(--at-control-sm-radius) - 2px));
}

.at-segmented > button:hover {
  background: var(--at-hover);
}

.at-segmented > button[aria-pressed="true"],
.at-segmented > button[aria-selected="true"] {
  background: var(--at-segment-selected);
  color: var(--at-text);
  box-shadow: var(--at-shadow-low);
}

.at-tabs {
  display: flex;
  flex: none;
  align-items: center;
  gap: var(--at-space-xxs);
}

.at-tabs > button {
  display: inline-flex;
  align-items: center;
  height: var(--at-control-md);
  padding: 0 var(--at-space-md);
  border: 0;
  border-radius: var(--at-control-md-radius);
  background: transparent;
  color: var(--at-text-muted);
  font: inherit;
  font-weight: var(--at-label-weight);
  white-space: nowrap;
}

.at-tabs > button:hover {
  background: var(--at-hover);
}

.at-tabs > button[aria-selected="true"] {
  background: var(--at-selected);
  color: var(--at-text);
}

/* ---------------------------------------------------------------- fields */

.at-field {
  display: flex;
  align-items: center;
  gap: var(--at-space-sm);
  height: var(--at-control-md);
  padding: 0 var(--at-space-sm);
  border: 1px solid var(--at-border);
  border-radius: var(--at-control-md-radius);
  background: var(--at-sunken);
  color: var(--at-text);
  transition: border-color var(--at-motion-fast) ease-out;
}

.at-field:focus-within {
  border-color: var(--at-accent);
  box-shadow: 0 0 0 3px var(--at-accent-wash);
}

.at-field .at-icon {
  color: var(--at-text-faint);
  width: 14px;
  height: 14px;
}

.at-field input,
.at-field textarea {
  flex: 1;
  min-width: 0;
  border: 0;
  padding: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  outline: none;
}

.at-field input::placeholder,
.at-field textarea::placeholder {
  color: var(--at-text-faint);
}

.at-field--area {
  align-items: flex-start;
  height: auto;
  padding: var(--at-space-sm);
  border-radius: var(--at-radius-md);
}

.at-field--area textarea {
  resize: vertical;
  min-height: 4.2em;
}

.at-form-field {
  display: flex;
  flex-direction: column;
  gap: var(--at-space-xs);
}

.at-form-field > label {
  font-size: var(--at-size-sm);
  font-weight: var(--at-label-weight);
  color: var(--at-text-muted);
}

.at-form-field__help {
  font-size: var(--at-size-sm);
  color: var(--at-text-faint);
}

/* ---------------------------------------------------------------- switch, checkbox, slider */

.at-switch {
  display: inline-flex;
  align-items: center;
  gap: var(--at-space-sm);
  cursor: default;
}

.at-switch input {
  --_h: max(18px, calc(var(--at-control-sm) - 2px));
  appearance: none;
  -webkit-appearance: none;
  position: relative;
  flex: none;
  width: calc(var(--_h) * 1.75);
  height: var(--_h);
  margin: 0;
  border-radius: calc(var(--_h) / 2);
  background: var(--at-border-strong);
  transition: background-color var(--at-motion-fast) ease-out;
}

.at-switch input::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: calc(var(--_h) - 4px);
  height: calc(var(--_h) - 4px);
  border-radius: 50%;
  background: #fff;
  box-shadow: var(--at-shadow-low);
  transition: transform var(--at-motion-fast) cubic-bezier(0.2, 0.8, 0.2, 1);
}

.at-switch input:checked {
  background: var(--at-on-fill);
}

.at-switch input:checked::after {
  background: var(--at-on-fill-thumb);
  transform: translateX(calc(var(--_h) * 0.75));
}

.at-switch input:focus-visible {
  outline-offset: 3px;
}

.at-checkbox {
  display: inline-flex;
  align-items: center;
  gap: var(--at-space-sm);
}

.at-checkbox input {
  appearance: none;
  -webkit-appearance: none;
  display: grid;
  place-content: center;
  flex: none;
  width: 16px;
  height: 16px;
  margin: 0;
  border: 1px solid var(--at-border-strong);
  border-radius: var(--at-radius-xs);
  background: var(--at-sunken);
  transition: background-color var(--at-motion-fast) ease-out;
}

.at-checkbox input::after {
  content: "";
  width: 9px;
  height: 5px;
  margin-top: -2px;
  border: solid var(--at-on-fill-thumb);
  border-width: 0 0 2px 2px;
  transform: rotate(-45deg) scale(0);
  transition: transform var(--at-motion-fast) ease-out;
}

.at-checkbox input:checked {
  border-color: transparent;
  background: var(--at-on-fill);
}

.at-checkbox input:checked::after {
  transform: rotate(-45deg) scale(1);
}

.at-slider {
  --_value: 50%;
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  height: 18px;
  margin: 0;
  background: transparent;
}

.at-slider::-webkit-slider-runnable-track {
  height: 4px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--at-on-fill) var(--_value), var(--at-sunken) var(--_value));
  box-shadow: inset 0 0 0 1px var(--at-border);
}

.at-slider::-moz-range-track {
  height: 4px;
  border-radius: 2px;
  background: var(--at-sunken);
  box-shadow: inset 0 0 0 1px var(--at-border);
}

.at-slider::-moz-range-progress {
  height: 4px;
  border-radius: 2px;
  background: var(--at-on-fill);
}

.at-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  margin-top: -5px;
  border: 1px solid rgb(0 0 0 / 0.12);
  border-radius: 50%;
  background: #fff;
  box-shadow: var(--at-shadow-medium);
}

.at-slider::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border: 1px solid rgb(0 0 0 / 0.12);
  border-radius: 50%;
  background: #fff;
  box-shadow: var(--at-shadow-medium);
}

/* ---------------------------------------------------------------- surfaces and lists */

.at-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--at-border);
  border-radius: var(--at-radius-md);
  background: var(--at-elevated);
}

.at-card--padded {
  padding: var(--at-panel-padding);
  gap: var(--at-space-md);
}

.at-popover {
  border: 1px solid var(--at-border);
  border-radius: var(--at-radius-md);
  background: var(--at-overlay);
  box-shadow: var(--at-shadow-medium);
  padding: var(--at-space-xs);
}

.at-section-header {
  display: flex;
  align-items: center;
  gap: var(--at-space-sm);
  min-height: var(--at-control-md);
}

.at-section-header > :first-child {
  flex: 1;
}

.at-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  padding: var(--at-space-xs) var(--at-space-sm);
}

.at-list > .at-caption {
  padding: var(--at-space-md) var(--at-space-sm) var(--at-space-xs);
}

.at-list-item {
  display: flex;
  flex: none;
  align-items: center;
  gap: var(--at-space-sm);
  min-height: var(--at-row);
  padding: 0 var(--at-space-sm);
  border: 0;
  border-radius: var(--at-radius-sm);
  background: transparent;
  color: var(--at-text-muted);
  font: inherit;
  font-size: var(--at-size-md);
  text-align: left;
  width: 100%;
}

button.at-list-item:hover,
a.at-list-item:hover {
  background: var(--at-hover);
}

.at-list-item .at-icon {
  width: 15px;
  height: 15px;
  color: var(--at-text-faint);
}

.at-list-item[aria-selected="true"],
.at-list-item[aria-current] {
  background: var(--at-selected);
  color: var(--at-text);
  font-weight: var(--at-label-weight);
}

.at-list-item[aria-selected="true"] .at-icon,
.at-list-item[aria-current] .at-icon {
  color: var(--at-accent-text);
}

.at-list-item__label {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.at-list-item__description {
  display: block;
  font-size: var(--at-size-sm);
  font-weight: 400;
  color: var(--at-text-faint);
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.at-list-item__trailing {
  flex: none;
  font-size: var(--at-size-xs);
  color: var(--at-text-faint);
}

.at-option-card {
  display: flex;
  flex-direction: column;
  gap: var(--at-space-xxs);
  padding: var(--at-space-md);
  border: 1px solid var(--at-border);
  border-radius: var(--at-radius-md);
  background: var(--at-elevated);
  color: var(--at-text);
  font: inherit;
  text-align: left;
}

.at-option-card:hover {
  border-color: var(--at-border-strong);
}

.at-option-card[aria-pressed="true"] {
  border-color: var(--at-accent);
  background: var(--at-accent-wash);
}

.at-option-card--agent[aria-pressed="true"] {
  border-color: var(--at-agent);
  background: var(--at-agent-wash);
}

/* ---------------------------------------------------------------- small displays */

.at-badge {
  --_color: var(--at-text-muted);
  --_wash: var(--at-hover);
  display: inline-flex;
  flex: none;
  align-items: center;
  gap: var(--at-space-xxs);
  height: 18px;
  padding: 0 6px;
  border-radius: var(--at-radius-xs);
  background: var(--_wash);
  color: var(--_color);
  font-size: var(--at-size-xs);
  font-weight: 600;
  white-space: nowrap;
}

.at-badge .at-icon {
  width: 11px;
  height: 11px;
}

.at-badge--accent { --_color: var(--at-accent-text); --_wash: var(--at-accent-wash); }
.at-badge--success { --_color: var(--at-success); --_wash: var(--at-success-wash); }
.at-badge--warning { --_color: var(--at-warning); --_wash: var(--at-warning-wash); }
.at-badge--danger { --_color: var(--at-danger); --_wash: var(--at-danger-wash); }
.at-badge--info { --_color: var(--at-info); --_wash: var(--at-info-wash); }
.at-badge--agent { --_color: var(--at-agent); --_wash: var(--at-agent-wash); }

.at-status-dot {
  display: inline-block;
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--at-text-faint);
}

.at-status-dot--success { background: var(--at-success); }
.at-status-dot--warning { background: var(--at-warning); }
.at-status-dot--danger { background: var(--at-danger); }
.at-status-dot--agent { background: var(--at-agent); }

.at-kbd {
  display: inline-flex;
  align-items: center;
  height: 18px;
  padding: 0 5px;
  border: 1px solid var(--at-border-strong);
  border-bottom-width: 2px;
  border-radius: var(--at-radius-xs);
  color: var(--at-text-muted);
  font-family: var(--at-font-mono);
  font-size: var(--at-size-xs);
}

.at-avatar {
  display: inline-grid;
  flex: none;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--at-hover);
  border: 1px solid var(--at-border);
  color: var(--at-text-muted);
  font-size: var(--at-size-xs);
  font-weight: 600;
}

.at-avatar--agent {
  border: 0;
  color: #fff;
  background: linear-gradient(135deg, var(--at-agent-gradient-0), var(--at-agent-gradient-1) 55%, var(--at-agent-gradient-2));
}

.at-avatar--agent .at-icon {
  width: 14px;
  height: 14px;
}

.at-progress {
  position: relative;
  height: 4px;
  overflow: hidden;
  border-radius: 2px;
  background: var(--at-sunken);
  box-shadow: inset 0 0 0 1px var(--at-border);
}

.at-progress > span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--at-on-fill);
}

.at-progress--agent > span {
  background: linear-gradient(90deg, var(--at-agent-gradient-0), var(--at-agent-gradient-1), var(--at-agent-gradient-2));
}

.at-spinner {
  display: inline-block;
  flex: none;
  width: 14px;
  height: 14px;
  border: 2px solid var(--at-border-strong);
  border-top-color: var(--at-accent);
  border-radius: 50%;
  animation: at-spin 0.8s linear infinite;
}

.at-spinner--agent {
  border-top-color: var(--at-agent);
}

@keyframes at-spin {
  to { transform: rotate(360deg); }
}

.at-skeleton {
  height: 10px;
  border-radius: var(--at-radius-xs);
  background: linear-gradient(90deg, var(--at-hover) 30%, var(--at-pressed) 50%, var(--at-hover) 70%);
  background-size: 300% 100%;
  animation: at-shimmer var(--at-motion-slow) ease-in-out infinite;
}

@keyframes at-shimmer {
  from { background-position: 100% 0; }
  to { background-position: 0 0; }
}

.at-meter {
  display: flex;
  flex-direction: column-reverse;
  width: 6px;
  align-self: stretch;
  overflow: hidden;
  border-radius: 2px;
  background: var(--at-sunken);
}

.at-meter > span {
  display: block;
  background: linear-gradient(0deg, var(--at-meter-0) 0 70%, var(--at-meter-1) 70% 90%, var(--at-meter-2) 90%);
  background-size: 100% var(--_full, 100px);
  background-position: bottom;
}

/* Tooltips from `data-tooltip`, after a short pause, as `Tooltip` shows them. */
[data-tooltip] {
  position: relative;
}

[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  top: calc(100% + 6px);
  left: 50%;
  z-index: 10;
  padding: 4px 8px;
  border: 1px solid var(--at-border);
  border-radius: var(--at-radius-sm);
  background: var(--at-overlay);
  box-shadow: var(--at-shadow-medium);
  color: var(--at-text);
  font-size: var(--at-size-sm);
  font-weight: 400;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transform: translate(-50%, -2px);
  transition: opacity var(--at-motion-fast) ease-out, transform var(--at-motion-fast) ease-out;
}

[data-tooltip]:hover::after {
  opacity: 1;
  transform: translate(-50%, 0);
  transition-delay: 500ms;
}

/* ---------------------------------------------------------------- menus */

.at-menu {
  display: flex;
  flex-direction: column;
  min-width: 200px;
  padding: var(--at-space-xs);
  border: 1px solid var(--at-border);
  border-radius: var(--at-radius-md);
  background: var(--at-overlay);
  box-shadow: var(--at-shadow-medium);
}

.at-menu > .at-caption {
  padding: var(--at-space-sm) var(--at-space-sm) var(--at-space-xxs);
}

.at-menu-item {
  display: flex;
  align-items: center;
  gap: var(--at-space-sm);
  height: var(--at-row);
  padding: 0 var(--at-space-sm);
  border: 0;
  border-radius: var(--at-radius-sm);
  background: transparent;
  color: var(--at-text);
  font: inherit;
  text-align: left;
}

.at-menu-item:hover {
  background: var(--at-hover);
}

.at-menu-item__check {
  width: 14px;
  color: var(--at-accent-text);
}

.at-menu-separator {
  height: 1px;
  margin: var(--at-space-xs) 0;
  background: var(--at-separator);
}

/* ---------------------------------------------------------------- agent surfaces */

.at-transcript {
  display: flex;
  flex-direction: column;
  gap: var(--at-space-lg);
  max-width: 760px;
  margin: 0 auto;
  padding: var(--at-space-xl) var(--at-space-lg);
}

.at-user-message {
  align-self: flex-end;
  max-width: 80%;
  padding: var(--at-space-sm) var(--at-space-md);
  border-radius: var(--at-radius-lg);
  background: var(--at-user-bubble);
  color: var(--at-on-user-bubble);
}

.at-assistant-message {
  display: flex;
  flex-direction: column;
  gap: var(--at-space-sm);
}

.at-assistant-message__header {
  display: flex;
  align-items: center;
  gap: var(--at-space-sm);
  font-size: var(--at-size-sm);
}

.at-assistant-message__header strong {
  font-weight: var(--at-heading-weight);
}

.at-assistant-message p {
  margin: 0;
}

.at-thought {
  display: inline-flex;
  align-items: center;
  gap: var(--at-space-xs);
  color: var(--at-text-muted);
  font-size: var(--at-size-sm);
}

.at-tool-group {
  border: 1px solid var(--at-border);
  border-radius: var(--at-radius-md);
  background: var(--at-elevated);
  padding: var(--at-space-xs) var(--at-space-sm);
}

.at-tool-call {
  display: flex;
  align-items: center;
  gap: var(--at-space-sm);
  height: var(--at-row);
  font-size: var(--at-size-sm);
}

.at-tool-call .at-icon {
  width: 13px;
  height: 13px;
  color: var(--at-text-faint);
}

.at-tool-call__name {
  margin-left: auto;
  font-family: var(--at-font-mono);
  font-size: var(--at-size-xs);
  color: var(--at-text-faint);
}

.at-tool-call__done {
  color: var(--at-success);
}

.at-code {
  margin: 0;
  padding: var(--at-space-md);
  border: 1px solid var(--at-border);
  border-radius: var(--at-radius-md);
  background: var(--at-sunken);
  color: var(--at-text);
  font-family: var(--at-font-mono);
  font-size: var(--at-size-sm);
  line-height: 1.55;
  overflow-x: auto;
}

.at-approval {
  display: flex;
  flex-direction: column;
  gap: var(--at-space-sm);
  padding: var(--at-space-md);
  border: 1px solid color-mix(in srgb, var(--at-warning) 40%, transparent);
  border-radius: var(--at-radius-md);
  background: var(--at-warning-wash);
}

.at-approval__actions {
  display: flex;
  align-items: center;
  gap: var(--at-space-sm);
}

/* The composer: an elevated card whose Send button follows its corner. */
.at-composer {
  --_inset: var(--at-space-sm);
  display: flex;
  flex-direction: column;
  gap: var(--at-space-xs);
  padding: var(--_inset);
  border: 1px solid var(--at-border-strong);
  border-radius: var(--at-radius-lg);
  background: var(--at-elevated);
  box-shadow: var(--at-shadow-low);
  transition: border-color var(--at-motion-fast) ease-out;
}

.at-composer:focus-within {
  border-color: color-mix(in srgb, var(--at-accent) 70%, transparent);
}

.at-composer textarea {
  min-height: 2.6em;
  padding: var(--at-space-xs);
  border: 0;
  background: transparent;
  color: var(--at-text);
  font: inherit;
  resize: none;
  outline: none;
}

.at-composer textarea::placeholder {
  color: var(--at-text-faint);
}

.at-composer__bar {
  display: flex;
  align-items: center;
  gap: var(--at-space-xs);
}

.at-composer__send {
  border-radius: max(0px, calc(var(--at-radius-lg) - var(--_inset))) !important;
}

.at-context-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--at-space-xs);
  align-self: flex-start;
  height: 22px;
  padding: 0 var(--at-space-sm);
  border: 1px solid var(--at-border);
  border-radius: var(--at-radius-xs);
  background: var(--at-sunken);
  color: var(--at-text-muted);
  font-size: var(--at-size-xs);
}

.at-context-chip .at-icon {
  width: 12px;
  height: 12px;
}

/* The edge glow while the AI is working: the agent gradient turning round a surface. */
.at-agent-glow {
  position: relative;
  isolation: isolate;
}

.at-agent-glow::before {
  content: "";
  position: absolute;
  inset: -1px;
  z-index: -1;
  border-radius: inherit;
  padding: 1.5px;
  background: conic-gradient(from var(--_angle, 0deg), var(--at-agent-gradient-0), var(--at-agent-gradient-1), var(--at-agent-gradient-2), var(--at-agent-gradient-0));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  animation: at-glow 4s linear infinite;
}

@property --_angle {
  syntax: "<angle>";
  inherits: false;
  initial-value: 0deg;
}

@keyframes at-glow {
  to { --_angle: 360deg; }
}

/* ---------------------------------------------------------------- ambient backdrop */

.at-ambient {
  position: fixed;
  inset: 0;
  z-index: -1;
  display: block;
  width: 100vw;
  height: 100vh;
  /* Shown until the first frame lands, and for good where there is no WebGPU. */
  background:
    radial-gradient(60% 50% at 25% 30%, color-mix(in srgb, var(--at-agent-gradient-0) 35%, transparent), transparent),
    radial-gradient(55% 55% at 75% 35%, color-mix(in srgb, var(--at-agent-gradient-2) 35%, transparent), transparent),
    radial-gradient(70% 60% at 50% 90%, color-mix(in srgb, var(--at-accent) 30%, transparent), transparent),
    var(--at-background);
}

/* ---------------------------------------------------------------- select */

/* A native select, dressed as a secondary button with a chevron. */
.at-select {
  appearance: none;
  -webkit-appearance: none;
  height: var(--at-control-md);
  padding: 0 calc(var(--at-control-padding) + 14px) 0 var(--at-control-padding);
  border: 1px solid var(--at-button-secondary-border);
  border-radius: var(--at-control-md-radius);
  background:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 24 24' fill='none' stroke='%23888' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E") no-repeat right calc(var(--at-control-padding) * 0.7) center,
    linear-gradient(180deg, var(--at-raised-top), var(--at-button-secondary-fill));
  box-shadow: var(--at-raised-shadow);
  color: var(--at-text);
  font: inherit;
  font-size: var(--at-size-md);
  font-weight: var(--at-label-weight);
}

.at-select--sm {
  height: var(--at-control-sm);
  border-radius: var(--at-control-sm-radius);
  font-size: var(--at-size-sm);
}