:root {
  --a11y-ui-bg: #ffffff;
  --a11y-ui-fg: #0f172a;
  --a11y-ui-muted: #334155;
  --a11y-ui-border: #cbd5e1;
  --a11y-ui-border-strong: #94a3b8;
  --a11y-ui-hover: #f1f5f9;
  --a11y-ui-active: #0f172a;
  --a11y-ui-active-fg: #ffffff;
  --a11y-ui-focus: #1d4ed8;
  --a11y-ui-shadow: 0 0.5rem 1.25rem rgba(15, 23, 42, 0.22);
}

.a11y-toggle {
  z-index: 99999;
  min-height: 3.25rem;
  min-width: 3.25rem;
  padding: 0.75rem 1rem;
  border: 0.125rem solid var(--a11y-ui-border-strong);
  border-radius: 0.875rem;
  background: var(--a11y-ui-bg);
  color: var(--a11y-ui-fg);
  font: 700 1rem/1.2 Arial, Helvetica, sans-serif;
  letter-spacing: 0.02em;
  cursor: pointer;
}

.a11y-toggle:hover {
  background: var(--a11y-ui-hover);
}

.a11y-toggle:active {
  transform: translateY(0.0625rem);
}

.a11y-toggle:focus-visible {
  outline: 0.1875rem solid var(--a11y-ui-focus);
  outline-offset: 0.125rem;
}

.a11y-toggle__icon {
  width: 1.25rem;
  height: 1.25rem;
  display: block;
}

.a11y-panel {
  z-index: 99999;
  width: min(56rem, calc(100vw - 2rem));
  max-height: calc(100vh - 6rem);
  overflow: auto;
  border: 0.125rem solid var(--a11y-ui-border-strong);
  border-radius: 1rem;
  background: var(--a11y-ui-bg);
  color: var(--a11y-ui-fg);
  box-shadow: var(--a11y-ui-shadow);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 1rem;
  row-gap: 1.5rem;
  padding: 1rem;
  font: 600 1rem/1.35 Arial, Helvetica, sans-serif;
}

.a11y-panel[hidden] {
  display: none;
}

.a11y-panel__row {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
  min-width: 0;
}

.a11y-panel__row--full {
  grid-column: 1 / -1;
}

.a11y-panel__label {
  font: 700 1rem/1.3 Arial, Helvetica, sans-serif;
  color: var(--a11y-ui-muted);
}

.a11y-panel__content {
  display: grid;
  gap: 0.5rem;
}

.a11y-panel__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
  padding-bottom: 0.625rem;
  border-bottom: 0.125rem solid var(--a11y-ui-border);
}

.a11y-panel__actions button {
  min-height: 3rem;
  padding: 0.625rem 0.875rem;
  border: 0.125rem solid var(--a11y-ui-border-strong);
  border-radius: 0.75rem;
  background: #f8fafc;
  color: var(--a11y-ui-fg);
  font: 700 1rem/1.1 Arial, Helvetica, sans-serif;
  cursor: pointer;
}

.a11y-panel__actions button:hover {
  background: var(--a11y-ui-hover);
}

.a11y-panel__actions button:focus-visible {
  outline: 0.1875rem solid var(--a11y-ui-focus);
  outline-offset: 0.125rem;
}

.a11y-panel__segment {
  display: flex;
  flex-wrap: wrap;
  column-gap: 0.5rem;
  row-gap: 0.625rem;
}

.a11y-panel__segment-btn {
  min-height: 3rem;
  padding: 0.625rem 0.875rem;
  border: 0.125rem solid var(--a11y-ui-border-strong);
  border-radius: 0.75rem;
  background: #f8fafc;
  color: var(--a11y-ui-fg);
  font: 700 1rem/1.1 Arial, Helvetica, sans-serif;
  cursor: pointer;
}

.a11y-panel__segment-btn:hover {
  background: var(--a11y-ui-hover);
}

.a11y-panel__segment-btn.is-active {
  background: var(--a11y-ui-active);
  color: var(--a11y-ui-active-fg);
  border-color: var(--a11y-ui-active);
}

.a11y-panel__segment-btn:focus-visible {
  outline: 0.1875rem solid var(--a11y-ui-focus);
  outline-offset: 0.125rem;
}

@media (max-width: 64rem) {
  .a11y-panel {
    max-height: calc(100vh - 5rem);
    grid-template-columns: 1fr;
    column-gap: 0;
    padding: 0.875rem;
  }

  .a11y-panel__row,
  .a11y-panel__row--full {
    grid-column: 1 / -1;
  }

  .a11y-toggle {
    min-height: 3rem;
    min-width: 3rem;
    padding: 0.625rem 0.875rem;
  }
}