.lesson-standard-badge {
  display: inline-block;
  margin: 0 0 8px;
  text-decoration: none;
  font-size: 12px;
  letter-spacing: 0.02em;
}

.lesson-standard-badge:hover,
.lesson-standard-badge:focus-visible {
  filter: brightness(1.1);
  outline: none;
}

.hub-toolbar-sticky {
  position: sticky;
  top: 0;
  z-index: 90;
  background: #0f111a;
  padding: 8px 0 10px;
  margin: 0 0 8px;
  border-bottom: 1px solid var(--line);
}

body.light-theme .hub-toolbar-sticky {
  background: var(--cream, #f7f4ec);
}

.hub-clear-filters {
  display: inline-block;
  margin-top: 12px;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--line);
  background: #161825;
  color: var(--teal);
  border-radius: 12px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
}

.hub-clear-filters:hover,
.hub-clear-filters:focus-visible {
  border-color: var(--teal);
  outline: none;
}

body.light-theme .hub-clear-filters {
  background: #fff;
}

.hub-student-hint {
  font-size: 13px;
  color: var(--muted);
  background: rgba(251, 191, 36, 0.08);
  border: 1px solid rgba(251, 191, 36, 0.25);
  border-radius: 10px;
  padding: 10px 14px;
  margin: 0 0 12px;
  line-height: 1.5;
}

.hub-hint-link {
  display: inline;
  border: 0;
  background: none;
  padding: 0;
  margin: 0;
  color: var(--teal);
  font-weight: 700;
  font-size: inherit;
  font-family: inherit;
  cursor: pointer;
  text-decoration: underline;
}

.hub-hint-link:hover,
.hub-hint-link:focus-visible {
  color: var(--amber);
  outline: none;
}

.hub-enhance-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin: 0 0 12px;
}

.hub-mode-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 16px;
  border: 1px solid var(--line);
  background: #161825;
  color: var(--ink);
  border-radius: 12px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
}

.hub-mode-toggle:hover,
.hub-mode-toggle:focus-visible {
  background: #1e2133;
  border-color: var(--teal);
  color: var(--teal);
  outline: none;
}

.hub-mode-toggle[aria-pressed="true"] {
  background: rgba(45, 212, 191, 0.12);
  border-color: var(--teal);
  color: var(--teal);
}

.hub-filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 14px;
}

.hub-filter-chip {
  min-height: 36px;
  padding: 0 14px;
  border: 1px solid var(--line);
  background: #161825;
  color: var(--muted);
  border-radius: 9px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.hub-filter-chip:hover,
.hub-filter-chip:focus-visible {
  border-color: var(--teal);
  color: var(--teal);
  outline: none;
}

.hub-filter-chip[aria-pressed="true"] {
  background: rgba(45, 212, 191, 0.12);
  border-color: var(--teal);
  color: var(--teal);
}

.hub-progress-summary {
  font-size: 13px;
  color: var(--muted);
  margin: 0 0 16px;
}

.hub-progress-summary strong {
  color: var(--teal);
  font-weight: 700;
}

.unit-progress-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
  width: 100%;
}

.unit-progress-bar {
  flex: 1;
  height: 6px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 999px;
  overflow: hidden;
}

.unit-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--teal), var(--amber));
  border-radius: 999px;
  transition: width 0.35s ease;
}

.unit-progress-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--muted);
  white-space: nowrap;
}

.lesson-real-world {
  font-size: 13px;
  color: var(--ink);
  background: rgba(251, 191, 36, 0.06);
  border: 1px solid rgba(251, 191, 36, 0.18);
  border-radius: 8px;
  padding: 10px 12px;
  margin: 0 0 10px;
  line-height: 1.5;
}

.lesson-real-world-label {
  display: block;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--amber);
  margin-bottom: 4px;
}

.lesson-outline-item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.progress-check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  padding: 0;
  border: 1px solid var(--line);
  background: transparent;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
  color: var(--muted);
  flex-shrink: 0;
  transition: all 0.2s;
}

.progress-check:hover,
.progress-check:focus-visible {
  border-color: var(--teal);
  color: var(--teal);
  outline: none;
}

.progress-check[aria-pressed="true"] {
  background: rgba(45, 212, 191, 0.15);
  border-color: var(--teal);
  color: var(--teal);
}

.search-highlight {
  background: rgba(251, 191, 36, 0.25);
  color: inherit;
  border-radius: 2px;
  padding: 0 2px;
}

body:not(.teacher-mode) .teacher-only,
body:not(.teacher-mode) details.teacher-tools {
  display: none !important;
}

body.teacher-mode details.teacher-tools {
  display: block;
}

.search-empty-enhanced {
  text-align: center;
  padding: 28px 18px;
  color: var(--muted);
  font-size: 15px;
}

.search-empty-enhanced strong {
  color: var(--ink);
}

/* Smooth accordion (print fallback) */
@media screen {
  details.unit .unit-body,
  details.lesson .lesson-body {
    overflow: hidden;
    transition: opacity 0.25s ease;
  }
}

body.light-theme .hub-mode-toggle,
body.light-theme .hub-filter-chip {
  background: #ffffff;
  color: #5f6f80;
  border-color: #dbe5ef;
}

body.light-theme .hub-mode-toggle:hover,
body.light-theme .hub-mode-toggle:focus-visible,
body.light-theme .hub-filter-chip:hover,
body.light-theme .hub-filter-chip:focus-visible {
  background: #e8f7f4;
  border-color: #0f766e;
  color: #0f766e;
}

body.light-theme .hub-mode-toggle[aria-pressed="true"],
body.light-theme .hub-filter-chip[aria-pressed="true"] {
  background: #e8f7f4;
  border-color: #0f766e;
  color: #0f766e;
}

body.light-theme .lesson-real-world {
  background: #fffbeb;
  border-color: #fde68a;
  color: #17283a;
}

@media (prefers-reduced-motion: reduce) {
  .unit-progress-fill,
  details.unit .unit-body,
  details.lesson .lesson-body {
    transition: none;
  }
}

/* --- Accessibility: skip link --- */
.skip-link {
  position: absolute;
  left: 12px;
  top: -64px;
  z-index: 1000;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 10px;
  background: #15487f;
  color: #fff;
  font-family: "Nunito", system-ui, sans-serif;
  font-weight: 800;
  text-decoration: none;
  box-shadow: 0 6px 18px rgba(21, 72, 127, 0.3);
  transition: top 0.18s ease;
}
.skip-link:focus {
  top: 12px;
  outline: 3px solid #2c7d6b;
  outline-offset: 2px;
}

/* --- Search result count (live region) --- */
.result-count {
  margin: -2px 0 14px;
  font-size: 0.95rem;
  font-weight: 700;
  color: #56627a;
}
.result-count:empty {
  display: none;
}

/* --- Search clear (x) button --- */
.curr-search-clear {
  flex: 0 0 auto;
  width: 30px;
  height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: #eef2f7;
  color: #56627a;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  transition:
    background 0.15s,
    color 0.15s;
}
.curr-search-clear:hover {
  background: #e2e8f0;
  color: #15487f;
}
.curr-search-clear:focus-visible {
  outline: 3px solid #2c7d6b;
  outline-offset: 2px;
}
.curr-search-clear[hidden] {
  display: none;
}

/* --- Back-to-top floating button --- */
.hub-back-to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 900;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 50%;
  background: #15487f;
  color: #fff;
  font-size: 22px;
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 6px 18px rgba(21, 72, 127, 0.35);
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition:
    opacity 0.2s ease,
    transform 0.2s ease,
    background 0.15s;
}
.hub-back-to-top.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.hub-back-to-top:hover {
  background: #205fa6;
}
.hub-back-to-top:focus-visible {
  outline: 3px solid #2c7d6b;
  outline-offset: 2px;
}
@media print {
  /* --- "Unit at a glance": clean printable curriculum overview --- */
  .hub-back-to-top,
  .curr-search-clear,
  .skip-link,
  #hub-toolbar-sticky,
  .hub-enhance-controls,
  .hub-filter-chips,
  #hub-progress-summary,
  .hub-student-hint,
  .controls,
  .result-count,
  .no-results,
  .mailbox-feature,
  .eoy-callout,
  details.teacher-tools,
  .hub-recent,
  #launch-modal {
    display: none !important;
  }

  body,
  body.light-theme {
    background: #fff !important;
    color: #14223a !important;
  }
  .wrap {
    max-width: none !important;
    padding: 0 !important;
  }

  /* Print-only header injected by JS */
  #hub-print-header {
    display: block !important;
    margin: 0 0 14px;
    padding: 0 0 10px;
    border-bottom: 2px solid #15487f;
  }
  #hub-print-header h2 {
    margin: 0 0 2px;
    font-size: 20pt;
    color: #15487f;
  }
  #hub-print-header p {
    margin: 0;
    font-size: 10pt;
    color: #56627a;
  }

  /* Force every unit + lesson open and visible (JS also sets [open]) */
  details.unit,
  details.lesson {
    display: block !important;
    border: 1px solid #c9d4e3 !important;
    box-shadow: none !important;
    break-inside: avoid;
    page-break-inside: avoid;
  }
  details.unit {
    margin: 0 0 10px !important;
  }
  details.unit > summary,
  details.lesson > summary {
    list-style: none;
  }
  details.unit .unit-body,
  details.lesson .lesson-body {
    display: block !important;
    height: auto !important;
    overflow: visible !important;
  }
  details.lesson {
    break-inside: avoid;
    page-break-inside: avoid;
  }

  /* Links: keep readable text, drop hover chrome, no URL spew */
  a {
    color: #15487f !important;
    text-decoration: none !important;
  }
  a[href]::after {
    content: "" !important;
  }

  @page {
    margin: 1.4cm;
  }
}

/* Print header is hidden on screen, revealed only in @media print above */
#hub-print-header {
  display: none;
}
@media (prefers-reduced-motion: reduce) {
  .hub-back-to-top {
    transition: opacity 0.2s ease;
    transform: none;
  }
  .hub-back-to-top.show {
    transform: none;
  }
}

/* --- "Jump back in": recently opened lessons --- */
.hub-recent {
  margin: 0 0 18px;
  padding: 14px 16px;
  background: #f4f8fd;
  border: 1px solid #d8e3f1;
  border-radius: 14px;
}
.hub-recent-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 0 0 10px;
}
.hub-recent-title {
  font-family: "Nunito", system-ui, sans-serif;
  font-weight: 800;
  font-size: 0.98rem;
  color: #15487f;
}
.hub-recent-clear {
  border: 0;
  background: transparent;
  color: #56627a;
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  padding: 6px 8px;
  border-radius: 8px;
}
.hub-recent-clear:hover {
  background: #e6eef8;
  color: #15487f;
}
.hub-recent-clear:focus-visible {
  outline: 3px solid #2c7d6b;
  outline-offset: 2px;
}
.hub-recent-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.hub-recent-chip {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
  min-height: 48px;
  justify-content: center;
  padding: 8px 14px;
  background: #fff;
  border: 1px solid #d8e3f1;
  border-radius: 12px;
  text-decoration: none;
  max-width: 260px;
  transition:
    border-color 0.15s,
    box-shadow 0.15s,
    transform 0.1s;
}
.hub-recent-chip:hover {
  border-color: #205fa6;
  box-shadow: 0 4px 14px rgba(21, 72, 127, 0.14);
  transform: translateY(-1px);
}
.hub-recent-chip:focus-visible {
  outline: 3px solid #2c7d6b;
  outline-offset: 2px;
}
.hub-recent-unit {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #2c7d6b;
}
.hub-recent-name {
  font-weight: 700;
  color: #14223a;
  font-size: 0.92rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* --- Browse by standard (CCSS domain) --- */
.hub-standards {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 8px;
  margin: 0 0 14px;
}
.hub-standards-lead {
  font-size: 13px;
  font-weight: 800;
  color: #56627a;
  margin-right: 2px;
  padding-top: 9px;
}
.hub-standard-chip {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid #dbe5ef;
  background: #fff;
  border-radius: 9px;
  font-size: 13px;
  cursor: pointer;
  transition:
    background 0.15s,
    border-color 0.15s,
    color 0.15s;
}
.hub-standard-chip .hsc-code {
  font-weight: 800;
  color: #15487f;
}
.hub-standard-chip .hsc-label {
  color: #56627a;
  font-weight: 600;
}
.hub-standard-chip:hover,
.hub-standard-chip:focus-visible {
  border-color: #2c7d6b;
  outline: none;
}
.hub-standard-chip[aria-pressed="true"] {
  background: #e8f7f4;
  border-color: #2c7d6b;
}
.hub-standard-chip[aria-pressed="true"] .hsc-code,
.hub-standard-chip[aria-pressed="true"] .hsc-label {
  color: #176153;
}
.hub-standard-chip:focus-visible {
  outline: 3px solid #2c7d6b;
  outline-offset: 2px;
}
/* Domain chip + its specific-standard dropdown, stacked vertically. */
.hub-standard-group {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 6px;
}
.hub-substd-select {
  min-height: 32px;
  max-width: 220px;
  padding: 0 8px;
  border: 1px solid #dbe5ef;
  border-radius: 8px;
  background: #fff;
  color: #15487f;
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
}
.hub-substd-select:hover,
.hub-substd-select:focus-visible {
  border-color: #2c7d6b;
  outline: none;
}
.hub-substd-select:focus-visible {
  outline: 3px solid #2c7d6b;
  outline-offset: 2px;
}
@media (max-width: 520px) {
  .hub-standard-chip .hsc-label {
    display: none;
  }
  .hub-substd-select {
    max-width: none;
  }
}

/* --- Per-lesson "Copy link" (shareable deep link) --- */
.lesson-copy-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 40px;
  margin-left: 10px;
  padding: 0 14px;
  border: 1px solid #d8e3f1;
  background: #fff;
  color: #15487f;
  border-radius: 10px;
  font-family: "Nunito", system-ui, sans-serif;
  font-weight: 800;
  font-size: 0.85rem;
  cursor: pointer;
  transition:
    background 0.15s,
    border-color 0.15s,
    color 0.15s;
}
.lesson-copy-link:hover,
.lesson-copy-link:focus-visible {
  border-color: #205fa6;
  background: #f4f8fd;
  outline: none;
}
.lesson-copy-link:focus-visible {
  outline: 3px solid #2c7d6b;
  outline-offset: 2px;
}
.lesson-copy-link.copied {
  background: #e8f7f4;
  border-color: #2c7d6b;
  color: #176153;
}
@media print {
  .lesson-copy-link {
    display: none !important;
  }
}

/* --- Per-unit "Print unit" button --- */
.unit-print-btn {
  font-family: "Nunito", system-ui, sans-serif;
  cursor: pointer;
  line-height: 1.2;
}
.unit-print-btn:focus-visible {
  outline: 3px solid #2c7d6b;
  outline-offset: 2px;
}
/* Print only the chosen unit when triggered from its card */
@media print {
  body.print-single-unit details.unit:not(.print-this-unit) {
    display: none !important;
  }
}