/**
 * display-mode.css
 * ----------------
 * Styles for the display mode toggle (Symbols | Hybrid | Numerics).
 * Scoped to .discovery-zone to prevent bleed.
 * 
 * Brand colors:
 *   Ocean Blue  #0D3B6E
 *   Forest Green #2D6A4F
 *   Sand Gold   #C8963E
 */

/* ---- Global toggle control ------------------------------------------- */
.discovery-zone .display-mode-toggle {
  display: inline-flex;
  gap: 0;
  background: #f0f0f0;
  border-radius: 8px;
  padding: 4px;
  margin: 20px 0;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.discovery-zone .display-mode-btn {
  padding: 10px 20px;
  border: none;
  background: transparent;
  color: #333;
  font-size: 14px;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 150ms ease, color 150ms ease, transform 100ms ease;
  min-width: 90px;
  font-family: "Source Sans 3", sans-serif;
}

.discovery-zone .display-mode-btn:hover {
  background: rgba(13, 59, 110, 0.08);
}

.discovery-zone .display-mode-btn.active {
  background: #0D3B6E;
  color: #fff;
  box-shadow: 0 2px 4px rgba(13, 59, 110, 0.3);
}

.discovery-zone .display-mode-btn:focus {
  outline: 2px solid #C8963E;
  outline-offset: 2px;
}

.discovery-zone .display-mode-btn:active {
  transform: scale(0.98);
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  .discovery-zone .display-mode-btn {
    transition: none;
  }
}

/* ---- Per-equation local toggle badge --------------------------------- */
.discovery-zone .equation-mode-badge {
  display: inline-flex;
  gap: 2px;
  background: #f6f8fb;
  border: 1px solid #d9e1ec;
  border-radius: 4px;
  padding: 2px;
  margin-left: 8px;
  vertical-align: middle;
}

.discovery-zone .equation-mode-btn {
  width: 24px;
  height: 24px;
  padding: 0;
  border: none;
  background: transparent;
  color: #666;
  font-size: 11px;
  font-weight: 600;
  border-radius: 3px;
  cursor: pointer;
  transition: background-color 100ms ease, color 100ms ease;
  line-height: 1;
  font-family: "Source Sans 3", sans-serif;
}

.discovery-zone .equation-mode-btn:hover {
  background: rgba(13, 59, 110, 0.08);
  color: #0D3B6E;
}

.discovery-zone .equation-mode-btn.active {
  background: #0D3B6E;
  color: #fff;
}

.discovery-zone .equation-mode-btn:focus {
  outline: 2px solid #C8963E;
  outline-offset: -1px;
}

/* ---- Cross-fade animation for mode transitions ----------------------- */
.discovery-zone .katex-expr {
  transition: opacity 150ms ease;
}

.discovery-zone .katex-expr.mode-transition {
  opacity: 0;
}

@media (prefers-reduced-motion: reduce) {
  .discovery-zone .katex-expr {
    transition: none;
  }
}