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

:root {
  font-family:
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    'Segoe UI',
    sans-serif;
  background: #f6f7fb;
}

body {
  margin: 0;
  min-width: 1180px;
  background: #f6f7fb;
}

button,
select,
input {
  font: inherit;
}

code,
kbd {
  font-family:
    ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono',
    monospace;
}

.xslt-app-shell {
  --app-surface: var(--toolbox-surface);
  --app-surface-soft: var(--toolbox-surface-soft);
  --app-text: var(--toolbox-text);
  --app-text-secondary: #374151;
  --app-muted: var(--toolbox-muted);
  --app-border: var(--toolbox-border);
  --app-border-soft: #e5e7eb;
  --app-control: #e5e7eb;
  --app-control-hover: #d1d5db;
  --app-primary: #2563eb;
  --app-primary-contrast: #ffffff;
  --app-danger: #dc2626;
  --app-danger-surface: #fff1f2;
  --app-danger-text: #991b1b;
  --app-danger-ink: #881337;
  --app-danger-border: #fecaca;
  --app-danger-border-strong: #fca5a5;
  --app-success-surface: #f0fdf4;
  --app-success-text: #14532d;
  --app-success-border: #86efac;
  --app-warning-surface: #fffbeb;
  --app-warning-text: #92400e;
  --app-info-surface: #eff6ff;
  --app-info-text: #1e40af;
  --app-focus: #bfdbfe;
  --app-accent-border: #c7d2fe;
  --app-backdrop: rgb(15 23 42 / 60%);
  --app-card-shadow: 0 1px 3px rgb(15 23 42 / 12%);
  --app-float-shadow: 0 12px 30px rgb(15 23 42 / 22%);
  --app-dialog-shadow: 0 24px 60px rgb(15 23 42 / 40%);
  --app-small-shadow: 0 1px 2px rgb(15 23 42 / 25%);
  --app-focus-ring: rgb(37 99 235 / 22%);
  --app-editor-background: #ffffff;
  --app-editor-text: #111827;
  --app-editor-gutter: #f9fafb;
  --app-editor-active-line: rgb(37 99 235 / 8%);
}

[data-toolbox-theme='dark'].xslt-app-shell {
  --app-text-secondary: #c8d1e4;
  --app-border-soft: #303a50;
  --app-control: #293247;
  --app-control-hover: #37435c;
  --app-primary: #a9b7ff;
  --app-primary-contrast: #11182a;
  --app-danger: #fb7185;
  --app-danger-surface: #3b1d27;
  --app-danger-text: #fecdd3;
  --app-danger-ink: #fecdd3;
  --app-danger-border: #7f3344;
  --app-danger-border-strong: #a84457;
  --app-success-surface: #123424;
  --app-success-text: #bbf7d0;
  --app-success-border: #23734a;
  --app-warning-surface: #3a290e;
  --app-warning-text: #fde68a;
  --app-info-surface: #172554;
  --app-info-text: #bfdbfe;
  --app-focus: #7dd3fc;
  --app-accent-border: #4c5c91;
  --app-backdrop: rgb(0 0 0 / 72%);
  --app-card-shadow: 0 1px 4px rgb(0 0 0 / 32%);
  --app-float-shadow: 0 14px 34px rgb(0 0 0 / 46%);
  --app-dialog-shadow: 0 24px 64px rgb(0 0 0 / 58%);
  --app-small-shadow: 0 1px 2px rgb(0 0 0 / 45%);
  --app-focus-ring: rgb(125 211 252 / 24%);
  --app-editor-background: #20252e;
  --app-editor-text: #abb2bf;
  --app-editor-gutter: #171b22;
  --app-editor-active-line: rgb(255 255 255 / 6%);
}

@media (prefers-color-scheme: dark) {
  [data-toolbox-theme='system'].xslt-app-shell {
    --app-text-secondary: #c8d1e4;
    --app-border-soft: #303a50;
    --app-control: #293247;
    --app-control-hover: #37435c;
    --app-primary: #a9b7ff;
    --app-primary-contrast: #11182a;
    --app-danger: #fb7185;
    --app-danger-surface: #3b1d27;
    --app-danger-text: #fecdd3;
    --app-danger-ink: #fecdd3;
    --app-danger-border: #7f3344;
    --app-danger-border-strong: #a84457;
    --app-success-surface: #123424;
    --app-success-text: #bbf7d0;
    --app-success-border: #23734a;
    --app-warning-surface: #3a290e;
    --app-warning-text: #fde68a;
    --app-info-surface: #172554;
    --app-info-text: #bfdbfe;
    --app-focus: #7dd3fc;
    --app-accent-border: #4c5c91;
    --app-backdrop: rgb(0 0 0 / 72%);
    --app-card-shadow: 0 1px 4px rgb(0 0 0 / 32%);
    --app-float-shadow: 0 14px 34px rgb(0 0 0 / 46%);
    --app-dialog-shadow: 0 24px 64px rgb(0 0 0 / 58%);
    --app-small-shadow: 0 1px 2px rgb(0 0 0 / 45%);
    --app-focus-ring: rgb(125 211 252 / 24%);
    --app-editor-background: #20252e;
    --app-editor-text: #abb2bf;
    --app-editor-gutter: #171b22;
    --app-editor-active-line: rgb(255 255 255 / 6%);
  }
}

.xslt-app-shell > .toolbox-shell__main {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.card {
  width: 100%;
  background: var(--app-surface);
  border-radius: 0.75rem;
  box-shadow: var(--app-card-shadow);
}

.button,
.mini-button,
.snippet-button,
.icon-button,
.editor-tool-button {
  border: none;
  cursor: pointer;
}

.button:disabled,
.mini-button:disabled,
.snippet-button:disabled,
.editor-tool-button:disabled {
  opacity: 0.55;
  cursor: default;
}

.button {
  border-radius: 0.5rem;
  padding: 0.45rem 0.85rem;
  font-size: 0.9rem;
  font-weight: 600;
}

.button.primary {
  background: var(--app-primary);
  color: var(--app-primary-contrast);
}

.button.secondary {
  background: var(--app-control);
  color: var(--app-text);
}

.button.danger {
  background: var(--app-danger);
  color: var(--app-primary-contrast);
}

.button.danger-outline {
  border: 1px solid var(--app-danger-border);
  background: var(--app-danger-surface);
  color: var(--app-danger-text);
}

.icon-button {
  width: 1.9rem;
  height: 1.9rem;
  border-radius: 999px;
  background: var(--app-control);
  color: var(--app-text);
  font-size: 1.2rem;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.toolbar {
  padding: 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.toolbar-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.toolbar-row-main {
  padding-top: 0;
}

.toolbar-options {
  align-items: center;
  color: var(--app-text-secondary);
  font-size: 0.85rem;
}

.stylesheet-trust-status {
  padding: 0.65rem 0.75rem;
  border: 1px solid;
  border-radius: 0.55rem;
  font-size: 0.82rem;
  line-height: 1.45;
}

.stylesheet-trust-status.is-untrusted {
  border-color: var(--app-danger-border-strong);
  background: var(--app-danger-surface);
  color: var(--app-danger-ink);
}

.stylesheet-trust-status.is-trusted {
  border-color: var(--app-success-border);
  background: var(--app-success-surface);
  color: var(--app-success-text);
}

.toggle-option {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  cursor: pointer;
  user-select: none;
}

.toggle-option input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.toggle-slider {
  position: relative;
  width: 2.35rem;
  height: 1.25rem;
  border-radius: 999px;
  background: var(--app-control-hover);
  transition:
    background 0.15s ease,
    box-shadow 0.15s ease;
}

.toggle-slider::before {
  content: '';
  position: absolute;
  top: 0.17rem;
  left: 0.17rem;
  width: 0.91rem;
  height: 0.91rem;
  border-radius: 999px;
  background: var(--app-surface);
  box-shadow: var(--app-small-shadow);
  transition: transform 0.15s ease;
}

.toggle-option input:checked + .toggle-slider {
  background: var(--app-primary);
}

.toggle-option input:checked + .toggle-slider::before {
  transform: translateX(1.1rem);
}

.toggle-option input:focus-visible + .toggle-slider {
  box-shadow: 0 0 0 3px var(--app-focus-ring);
}

.toolbar-meta {
  justify-content: space-between;
  color: var(--app-muted);
  font-size: 0.85rem;
}

.toolbar-meta label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  color: var(--app-text-secondary);
}

.toolbar-meta select {
  min-width: 18rem;
  padding: 0.35rem 0.5rem;
  border: 1px solid var(--app-border);
  border-radius: 0.5rem;
  background: var(--app-surface);
  color: var(--app-text);
}

.status-banner {
  border-left: 4px solid var(--app-primary);
  border-radius: 0.65rem;
  background: var(--app-info-surface);
  color: var(--app-info-text);
  padding: 0.65rem 0.8rem;
  box-shadow: var(--app-card-shadow);
}

.runtime-diagnostics {
  padding: 0.85rem;
}

.runtime-diagnostics h2 {
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
}

.workspace-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  align-items: stretch;
}

.editor-panel {
  min-width: 0;
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.editor-panel-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.5rem;
}

.editor-panel h2 {
  margin: 0;
  font-size: 0.98rem;
}

.editor-panel small {
  color: var(--app-muted);
  font-size: 0.78rem;
}

.diagnostics-badge {
  flex: 0 0 auto;
  border-radius: 999px;
  background: var(--app-surface-soft);
  color: var(--app-text-secondary);
  padding: 0.3rem 0.55rem;
  font-size: 0.75rem;
  font-weight: 700;
}

.editor-panel-actions {
  display: flex;
  gap: 0.25rem;
  flex-wrap: wrap;
  align-items: center;
  padding: 0.25rem;
  border: 1px solid var(--app-border-soft);
  border-radius: 0.55rem;
  background: var(--app-surface-soft);
}

.editor-tool-button {
  width: 1.9rem;
  height: 1.9rem;
  border-radius: 0.4rem;
  background: transparent;
  color: var(--app-text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  line-height: 1;
}

.editor-tool-button i {
  pointer-events: none;
}

.editor-tool-button:hover:not(:disabled),
.editor-tool-button:focus-visible {
  background: var(--app-control);
  outline: none;
}

.editor-toolbar-separator {
  width: 1px;
  align-self: stretch;
  min-height: 1.45rem;
  margin: 0 0.2rem;
  background: var(--app-border);
}

.mini-button,
.snippet-button {
  border-radius: 0.4rem;
  background: var(--app-surface-soft);
  color: var(--app-text-secondary);
  padding: 0.28rem 0.48rem;
  font-size: 0.78rem;
  font-weight: 600;
}

.mini-button:hover,
.snippet-button:hover {
  background: var(--app-control-hover);
}

.editor-host {
  overflow: hidden;
  border: 1px solid var(--app-border);
  border-radius: 0.65rem;
  background: var(--app-editor-background);
}

.editor-host .cm-editor {
  min-height: 28rem;
  height: 28rem;
}

.editor-host .cm-focused {
  outline: 2px solid var(--app-focus);
  outline-offset: -2px;
}

.snippet-toolbox {
  position: relative;
}

.snippet-toolbox summary {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.snippet-toolbox summary::-webkit-details-marker {
  display: none;
}

.snippet-grid {
  position: absolute;
  z-index: 5;
  right: 0;
  top: 1.8rem;
  width: 18rem;
  max-height: 18rem;
  overflow: auto;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.35rem;
  padding: 0.55rem;
  border: 1px solid var(--app-accent-border);
  border-radius: 0.65rem;
  background: var(--app-surface);
  box-shadow: var(--app-float-shadow);
}

.diagnostics-empty {
  margin: 0;
  color: var(--app-muted);
  font-size: 0.82rem;
}

.diagnostics-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.diagnostic {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.45rem;
  align-items: start;
  border-radius: 0.5rem;
  padding: 0.45rem 0.55rem;
  font-size: 0.8rem;
}

.diagnostic strong {
  font-size: 0.72rem;
}

.diagnostic-error {
  background: var(--app-danger-surface);
  color: var(--app-danger-text);
}

.diagnostic-warning {
  background: var(--app-warning-surface);
  color: var(--app-warning-text);
}

.diagnostic-info {
  background: var(--app-info-surface);
  color: var(--app-info-text);
}

.trace-panel {
  padding: 0.85rem;
}

.trace-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: flex-start;
  margin-bottom: 0.75rem;
}

.trace-header h2 {
  margin: 0;
  font-size: 0.98rem;
}

.trace-header p {
  margin: 0.2rem 0 0;
  color: var(--app-muted);
  font-size: 0.86rem;
}

.trace-header small {
  color: var(--app-muted);
  white-space: nowrap;
}

.trace-table-wrap {
  overflow: auto;
  border: 1px solid var(--app-border-soft);
  border-radius: 0.65rem;
}

.trace-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
}

.trace-table th,
.trace-table td {
  padding: 0.5rem;
  border-bottom: 1px solid var(--app-border-soft);
  text-align: left;
  vertical-align: top;
}

.trace-table th {
  background: var(--app-surface-soft);
  color: var(--app-text-secondary);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.action-dialog-backdrop,
.help-dialog-backdrop {
  position: fixed;
  inset: 0;
  z-index: 70;
  background: var(--app-backdrop);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.action-dialog-panel {
  width: min(440px, 100%);
  background: var(--app-surface);
  border-radius: 0.75rem;
  box-shadow: var(--app-dialog-shadow);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.action-dialog-header,
.help-dialog-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
}

.action-dialog-header h2,
.help-dialog-header h2 {
  margin: 0;
  font-size: 1rem;
}

.action-dialog-body {
  color: var(--app-text-secondary);
  font-size: 0.9rem;
  line-height: 1.45;
}

.action-dialog-body p {
  margin: 0;
}

.action-dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.help-dialog-backdrop {
  z-index: 80;
}

.help-dialog-panel {
  width: min(900px, 100%);
  max-height: min(88vh, 760px);
  overflow: auto;
  background: var(--app-surface);
  border-radius: 0.9rem;
  box-shadow: var(--app-dialog-shadow);
}

.help-dialog-header {
  position: sticky;
  top: 0;
  z-index: 1;
  padding: 1rem;
  background: var(--app-surface);
  border-bottom: 1px solid var(--app-border-soft);
}

.help-dialog-header p {
  margin: 0.2rem 0 0;
  color: var(--app-muted);
}

.help-dialog-content {
  padding: 1rem;
  color: var(--app-text-secondary);
  line-height: 1.5;
}

.help-dialog-content h3 {
  margin: 1rem 0 0.35rem;
}

.help-dialog-content h3:first-child {
  margin-top: 0;
}

kbd {
  border: 1px solid var(--app-border);
  border-bottom-width: 2px;
  border-radius: 0.3rem;
  background: var(--app-surface-soft);
  padding: 0.05rem 0.25rem;
  font-size: 0.82em;
}

@media (max-width: 1280px) {
  body {
    min-width: 0;
  }

  .workspace-grid {
    grid-template-columns: 1fr;
  }

  .editor-host .cm-editor {
    height: 24rem;
  }

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