/* Semantic search widget. Colours follow the site's tokens, with Material's as a fallback. */

:root {
  --rb-ask-accent: var(--primary, var(--md-primary-fg-color));
  --rb-ask-accent-strong: var(--accent, var(--md-accent-fg-color));
  --rb-ask-on-accent: var(--md-primary-bg-color, #fff);
  --rb-ask-surface: var(--card, var(--md-default-bg-color));
  --rb-ask-sunken: var(--md-code-bg-color);
  --rb-ask-text: var(--md-default-fg-color);
  --rb-ask-muted: var(--md-default-fg-color--light);
  --rb-ask-line: var(--md-default-fg-color--lightest);
  --rb-ask-border: var(--md-default-fg-color--lighter);

  --rb-ask-space-1: .35rem;
  --rb-ask-space-2: .6rem;
  --rb-ask-space-3: .9rem;
  --rb-ask-space-4: 1.4rem;

  --rb-ask-size-sm: .68rem;
  --rb-ask-size-md: .78rem;
  --rb-ask-size-lg: .85rem;

  --rb-ask-radius: var(--radius, .5rem);
  --rb-ask-radius-sm: .3rem;
  --rb-ask-shadow: 0 2px 8px rgba(11, 22, 48, .16);
  --rb-ask-shadow-lg: 0 12px 32px rgba(11, 22, 48, .22);
}

/* --- launcher ------------------------------------------------------------ */

.rb-ask-button {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: var(--rb-ask-space-1);
  padding: .65rem 1.1rem;
  border: none;
  border-radius: 2rem;
  background: var(--rb-ask-accent);
  color: var(--rb-ask-on-accent);
  box-shadow: var(--rb-ask-shadow);
  font-family: var(--md-text-font-family);
  font-size: var(--rb-ask-size-md);
  font-weight: 600;
  cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}

.rb-ask-button:hover {
  background: var(--rb-ask-accent-strong);
  box-shadow: var(--rb-ask-shadow-lg);
  transform: translateY(-2px);
}

.rb-ask-button:active { transform: translateY(0); }

.rb-ask-button svg {
  width: 1rem;
  height: 1rem;
  fill: currentcolor;
}

/* Hidden while the panel is open: on narrow screens they overlap. */
.rb-ask-button[data-hidden="true"] {
  opacity: 0;
  visibility: hidden;
  transform: translateY(.5rem);
}

/* --- panel --------------------------------------------------------------- */

.rb-ask-panel {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  z-index: 101;
  display: flex;
  flex-direction: column;
  width: min(30rem, calc(100vw - 3rem));
  height: min(36rem, calc(100vh - 6rem));
  border-radius: var(--rb-ask-radius);
  background: var(--rb-ask-surface);
  box-shadow: var(--rb-ask-shadow-lg);
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transform: translateY(.5rem);
  transition: opacity .15s ease, transform .15s ease, visibility .15s;
}

.rb-ask-panel[data-open="true"] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* --- header -------------------------------------------------------------- */

.rb-ask-header {
  display: flex;
  align-items: center;
  gap: var(--rb-ask-space-2);
  padding: var(--rb-ask-space-2) var(--rb-ask-space-3);
  background: var(--rb-ask-accent);
  color: var(--rb-ask-on-accent);
}

.rb-ask-title {
  flex: 1;
  font-size: var(--rb-ask-size-lg);
  font-weight: 600;
}

.rb-ask-header button {
  padding: .2rem .4rem;
  border: none;
  border-radius: var(--rb-ask-radius-sm);
  background: none;
  color: inherit;
  font-family: inherit;
  font-size: var(--rb-ask-size-sm);
  line-height: 1;
  opacity: .75;
  cursor: pointer;
  transition: opacity .15s ease, background .15s ease;
}

.rb-ask-header button:hover {
  background: rgba(255, 255, 255, .15);
  opacity: 1;
}

.rb-ask-header .rb-ask-close { font-size: 1.1rem; }

/* --- thread -------------------------------------------------------------- */

.rb-ask-thread {
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.rb-ask-turn { padding: var(--rb-ask-space-3); }

.rb-ask-turn + .rb-ask-turn { border-top: 1px solid var(--rb-ask-line); }

.rb-ask-question {
  margin-bottom: var(--rb-ask-space-2);
  color: var(--rb-ask-text);
  font-size: var(--rb-ask-size-md);
  font-weight: 600;
  line-height: 1.5;
}

.rb-ask-answer {
  color: var(--rb-ask-text);
  font-size: var(--rb-ask-size-md);
  line-height: 1.65;
}

.rb-ask-answer p { margin: 0 0 var(--rb-ask-space-2); }
.rb-ask-answer p:last-child { margin-bottom: 0; }

.rb-ask-answer code {
  padding: .1rem .25rem;
  border-radius: .2rem;
  background: var(--rb-ask-sunken);
  font-family: var(--md-code-font-family);
  font-size: .9em;
}

.rb-ask-code {
  margin: var(--rb-ask-space-2) 0;
  padding: var(--rb-ask-space-2);
  border-radius: var(--rb-ask-radius-sm);
  background: var(--rb-ask-sunken);
  overflow-x: auto;
}

.rb-ask-code code {
  padding: 0;
  background: none;
  white-space: pre;
}

.rb-ask-cite {
  color: var(--rb-ask-accent);
  font-weight: 700;
  text-decoration: none;
}

.rb-ask-cite:hover { text-decoration: underline; }

.rb-ask-status {
  color: var(--rb-ask-muted);
  font-size: var(--rb-ask-size-md);
  line-height: 1.6;
}

.rb-ask-retry {
  margin-top: var(--rb-ask-space-2);
  padding: .3rem .7rem;
  border: 1px solid var(--rb-ask-border);
  border-radius: var(--rb-ask-radius-sm);
  background: none;
  color: var(--rb-ask-text);
  font-family: var(--md-text-font-family);
  font-size: var(--rb-ask-size-sm);
  cursor: pointer;
}

.rb-ask-retry:hover { background: var(--rb-ask-sunken); }

/* --- sources ------------------------------------------------------------- */

.rb-ask-sources { margin-top: var(--rb-ask-space-3); }

.rb-ask-sources-title {
  margin-bottom: var(--rb-ask-space-1);
  color: var(--rb-ask-muted);
  font-size: .62rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.rb-ask-hit {
  display: block;
  padding: var(--rb-ask-space-1) var(--rb-ask-space-2);
  border-radius: var(--rb-ask-radius-sm);
  color: inherit;
  text-decoration: none;
  transition: background .15s ease;
}

.rb-ask-hit:hover { background: var(--rb-ask-sunken); }

.rb-ask-crumb {
  display: flex;
  align-items: center;
  gap: var(--rb-ask-space-1);
  color: var(--rb-ask-accent);
  font-size: var(--rb-ask-size-sm);
  font-weight: 600;
}

/* min-width:0 lets the flex child shrink instead of forcing the row wider. */
.rb-ask-crumb span {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.rb-ask-doc { flex: none; }

.rb-ask-sep {
  flex: none;
  color: var(--rb-ask-muted);
  font-weight: 400;
}

/* The section absorbs the truncation: breadcrumbs can be a whole signature. */
.rb-ask-section {
  flex: 1 1 auto;
  color: var(--rb-ask-muted);
  font-weight: 400;
}

.rb-ask-num,
.rb-ask-year {
  flex: none;
  min-width: 1.1rem;
  padding: .05rem .3rem;
  border-radius: .6rem;
  font-size: .6rem;
  font-weight: 700;
  text-align: center;
}

.rb-ask-num {
  background: var(--rb-ask-accent);
  color: var(--rb-ask-on-accent);
}

/* Marks docs/years/ sources so the reader sees the answer describes a past state. */
.rb-ask-year {
  background: var(--rb-ask-line);
  color: var(--rb-ask-muted);
}

.rb-ask-answer { overflow-wrap: break-word; }

/* --- empty state --------------------------------------------------------- */

.rb-ask-empty { padding: var(--rb-ask-space-4) var(--rb-ask-space-3); }

.rb-ask-empty p {
  margin: 0 0 var(--rb-ask-space-3);
  color: var(--rb-ask-muted);
  font-size: var(--rb-ask-size-md);
  line-height: 1.6;
}

.rb-ask-examples {
  display: flex;
  flex-direction: column;
  gap: var(--rb-ask-space-1);
}

.rb-ask-example {
  padding: var(--rb-ask-space-2);
  border: 1px solid var(--rb-ask-line);
  border-radius: var(--rb-ask-radius-sm);
  background: none;
  color: var(--rb-ask-text);
  font-family: var(--md-text-font-family);
  font-size: var(--rb-ask-size-sm);
  text-align: left;
  cursor: pointer;
  transition: border-color .15s ease, background .15s ease;
}

.rb-ask-example:hover {
  border-color: var(--rb-ask-accent);
  background: var(--rb-ask-sunken);
}

/* --- form ---------------------------------------------------------------- */

.rb-ask-form {
  display: flex;
  gap: var(--rb-ask-space-1);
  padding: var(--rb-ask-space-2);
  border-top: 1px solid var(--rb-ask-line);
  background: var(--rb-ask-surface);
}

.rb-ask-input {
  flex: 1;
  min-width: 0;
  padding: .5rem .7rem;
  border: 1px solid var(--rb-ask-border);
  border-radius: var(--rb-ask-radius-sm);
  background: var(--rb-ask-surface);
  color: var(--rb-ask-text);
  font-family: var(--md-text-font-family);
  font-size: var(--rb-ask-size-md);
}

.rb-ask-input:focus {
  border-color: var(--rb-ask-accent);
  outline: none;
}

.rb-ask-submit {
  padding: .5rem 1rem;
  border: none;
  border-radius: var(--rb-ask-radius-sm);
  background: var(--rb-ask-accent);
  color: var(--rb-ask-on-accent);
  font-family: var(--md-text-font-family);
  font-size: var(--rb-ask-size-md);
  font-weight: 600;
  cursor: pointer;
  transition: background .15s ease;
}

.rb-ask-submit:hover { background: var(--rb-ask-accent-strong); }

/* --- focus --------------------------------------------------------------- */

.rb-ask-button:focus-visible,
.rb-ask-submit:focus-visible,
.rb-ask-example:focus-visible,
.rb-ask-retry:focus-visible,
.rb-ask-hit:focus-visible,
.rb-ask-cite:focus-visible {
  outline: 2px solid var(--rb-ask-accent);
  outline-offset: 2px;
}

.rb-ask-header button:focus-visible {
  outline: 2px solid var(--rb-ask-on-accent);
  outline-offset: 1px;
}

/* --- narrow screens ------------------------------------------------------ */

@media screen and (max-width: 45em) {
  .rb-ask-panel {
    right: .5rem;
    left: .5rem;
    bottom: .5rem;
    width: auto;
    height: min(80vh, calc(100vh - 1rem));
  }

  .rb-ask-button {
    right: .75rem;
    bottom: .75rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .rb-ask-button,
  .rb-ask-panel,
  .rb-ask-hit,
  .rb-ask-example { transition: none; }

  .rb-ask-button:hover { transform: none; }
}