/* CS 567 — deck affordance bar.
   Makes reveal's built-in views discoverable: overview, scroll, notes, PDF,
   full screen, help. Loaded after theme-cs567.css by every deck. */

.deck-ui {
  position: fixed;
  left: 12px;
  bottom: 10px;
  z-index: 40;
  display: flex;
  align-items: stretch;
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--rule, #c9d4e3);
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 1px 4px rgba(26, 54, 93, 0.10);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 12px;
  line-height: 1;
  opacity: 0.42;
  transition: opacity 0.18s ease;
  -webkit-backdrop-filter: saturate(1.4) blur(3px);
  backdrop-filter: saturate(1.4) blur(3px);
}
.deck-ui:hover,
.deck-ui:focus-within { opacity: 1; }

.deck-ui button,
.deck-ui a {
  display: flex;
  align-items: center;
  gap: 5px;
  margin: 0;
  padding: 5px 8px;
  border: 0;
  border-radius: 4px;
  background: transparent;
  color: var(--navy-mid, #2d4a6e);
  font: inherit;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
}
.deck-ui button:hover,
.deck-ui a:hover {
  background: var(--tint, #eaf1f9);
  color: var(--navy, #1a365d);
}
.deck-ui button:focus-visible,
.deck-ui a:focus-visible {
  outline: 2px solid var(--blue, #5B9BD5);
  outline-offset: -1px;
}
.deck-ui button[aria-pressed="true"] {
  background: var(--navy, #1a365d);
  color: #fff;
}

.deck-ui .du-icon {
  font-size: 13px;
  line-height: 1;
  opacity: 0.85;
}
.deck-ui .du-key {
  padding: 1px 4px;
  border: 1px solid var(--rule, #c9d4e3);
  border-radius: 3px;
  background: #fff;
  color: var(--muted, #5b6b7c);
  font-size: 10px;
}
.deck-ui button[aria-pressed="true"] .du-key {
  border-color: rgba(255, 255, 255, 0.45);
  background: transparent;
  color: rgba(255, 255, 255, 0.85);
}
.deck-ui .du-sep {
  width: 1px;
  margin: 4px 1px;
  background: var(--rule, #c9d4e3);
}

/* Narrow screens: drop the word labels, keep the icons. */
@media (max-width: 700px) {
  .deck-ui { opacity: 0.85; font-size: 11px; }
  .deck-ui .du-label,
  .deck-ui .du-key { display: none; }
}

/* Never in an export or on paper. reveal puts these on <html>. */
html.print-pdf .deck-ui,
html.reveal-print .deck-ui { display: none !important; }
@media print { .deck-ui { display: none !important; } }