/**
 * curriculum-utility-bar.css — Slim in-tool utility bar for math sub-tools.
 *
 * SPEC: <= 40px (default 38px) persistent utility bar docked to top of sub-tools:
 * - /curriculum/learning-labs/*
 * - /curriculum/math-canvas/
 * - /curriculum/extra-help/
 * - /curriculum/notes-studio/
 *
 * PALETTE: Navy (#0a1f33, #102a45) + Teal (#0f766e, #1fa6a2) on warm off-white (#fbfaf7, #ffffff).
 * HARD CONSTRAINT: No purple anywhere in any UI, state, or element.
 * WCAG 2.2 AA compliant: contrast >= 4.5:1, 3px focus-visible rings, zero layout shift.
 */

:root {
  --in-tool-bar-h: 38px;
  --in-tool-navy: #102a45;
  --in-tool-teal: #0f766e;
  --in-tool-teal-light: #e6f6f4;
  --in-tool-bg: #ffffff;
  --in-tool-border: #e2ded5;
  --in-tool-ink: #17202a;
  --in-tool-muted: #536471;
}

body.has-in-tool-bar {
  padding-top: var(--in-tool-bar-h) !important;
}

.curriculum-in-tool-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--in-tool-bar-h);
  background-color: var(--in-tool-bg);
  border-bottom: 1px solid var(--in-tool-border);
  box-shadow: 0 1px 3px rgba(10, 31, 51, 0.06);
  z-index: 10000;
  box-sizing: border-box;
  font-family: "Nunito", "Atkinson Hyperlegible", system-ui, -apple-system, sans-serif;
  color: var(--in-tool-ink);
}

.in-tool-bar-inner {
  height: 100%;
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

/* Left: Breadcrumbs & 1-Click Return to Hub */
.in-tool-left {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  font-size: 0.8rem;
  font-weight: 700;
}

.in-tool-hub-btn {
  background-color: var(--in-tool-navy);
  color: #ffffff;
  text-decoration: none;
  padding: 3px 9px;
  border-radius: 6px;
  font-weight: 800;
  font-size: 0.78rem;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: background 0.15s ease;
  min-height: 28px;
}

.in-tool-hub-btn:hover {
  background-color: var(--in-tool-teal);
}

.in-tool-sep {
  color: var(--in-tool-muted);
  opacity: 0.6;
}

.in-tool-crumb-trail {
  color: var(--in-tool-muted);
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

/* Middle: Tool Title */
.in-tool-center {
  flex: 1;
  text-align: center;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.84rem;
  font-weight: 800;
  color: var(--in-tool-navy);
}

/* Right: Mini-Utility Segment */
.in-tool-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.mini-segment {
  display: inline-flex;
  align-items: center;
  background-color: #f1f5f9;
  border: 1px solid var(--in-tool-border);
  border-radius: 14px;
  padding: 1px;
  gap: 1px;
}

.mini-segment-btn {
  background: transparent;
  border: none;
  font-family: inherit;
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--in-tool-muted);
  border-radius: 12px;
  padding: 2px 7px;
  cursor: pointer;
  min-height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.12s ease;
}

.mini-segment-btn:hover:not([aria-pressed="true"]) {
  color: var(--in-tool-navy);
}

.mini-segment-btn[aria-pressed="true"] {
  background-color: var(--in-tool-navy);
  color: #ffffff;
}

.mini-segment-btn[data-role="teacher"][aria-pressed="true"] {
  background-color: var(--in-tool-teal);
  color: #ffffff;
}

.mini-pill-btn {
  background-color: #f1f5f9;
  border: 1px solid var(--in-tool-border);
  border-radius: 14px;
  padding: 2px 8px;
  font-family: inherit;
  font-size: 0.76rem;
  font-weight: 800;
  color: var(--in-tool-muted);
  cursor: pointer;
  min-height: 26px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all 0.12s ease;
}

.mini-pill-btn:hover {
  border-color: var(--in-tool-teal);
  color: var(--in-tool-navy);
}

.mini-pill-btn[aria-pressed="true"] {
  background-color: var(--in-tool-teal);
  color: #ffffff;
  border-color: #0b5c56;
}

@media (max-width: 640px) {
  .in-tool-crumb-trail {
    display: none;
  }
}

.curriculum-in-tool-bar a:focus-visible,
.curriculum-in-tool-bar button:focus-visible {
  outline: 2px solid var(--in-tool-teal) !important;
  outline-offset: 1px !important;
}