/* AP Bio Unit 2 hub — command center, sticky nav, checklist, diagnostic results */

body.bio-unit2-learning-hub .hero.unit-hero .hero-inner {
  display: grid !important;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr) !important;
  align-items: center !important;
  gap: var(--space-6) !important;
}

body.bio-unit2-learning-hub .unit2-hero-main {
  min-width: 0;
}

body.bio-unit2-learning-hub .hero.unit-hero .unit-hero-keypanel {
  align-self: center;
  justify-self: end;
  width: 100%;
  max-width: 24.5rem;
}

body.bio-unit2-learning-hub .unit2-hero-lead {
  margin: 0 0 var(--space-4);
  color: rgba(255, 255, 255, 0.88);
  font-size: 0.98rem;
  line-height: 1.55;
  max-width: 40rem;
}

body.bio-unit2-learning-hub .unit2-hero-stat-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 var(--space-4);
  padding: 0;
  list-style: none;
}

body.bio-unit2-learning-hub .unit2-hero-stat-chips li {
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.92);
  font-size: 0.78rem;
  font-weight: 700;
}

body.bio-unit2-learning-hub .hero-ctas {
  margin-bottom: var(--space-3) !important;
}

body.bio-unit2-learning-hub .unit2-command-panel {
  padding: 18px 16px 16px;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background:
    radial-gradient(circle at 90% 10%, rgba(250, 204, 21, 0.14), transparent 45%),
    linear-gradient(155deg, #070b43 0%, #0a0f5a 55%, #1c2580 100%);
  color: #ffffff;
  box-shadow: 0 18px 40px rgba(10, 15, 90, 0.28);
}

body.bio-unit2-learning-hub .unit2-command-panel-title {
  margin: 0 0 12px;
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #ffd37a;
}

body.bio-unit2-learning-hub .unit2-command-mini-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 0 0 14px;
}

body.bio-unit2-learning-hub .unit2-command-mini {
  padding: 10px 10px 9px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.06);
}

body.bio-unit2-learning-hub .unit2-command-mini-label {
  display: block;
  margin-bottom: 4px;
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.72);
}

body.bio-unit2-learning-hub .unit2-command-mini strong {
  display: block;
  font-size: 0.82rem;
  line-height: 1.35;
  color: #ffffff;
  font-weight: 700;
}

body.bio-unit2-learning-hub .unit2-command-panel-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.84rem;
  font-weight: 800;
  color: #ffd37a;
  text-decoration: none;
}

body.bio-unit2-learning-hub .unit2-command-mini strong a {
  color: #ffffff;
  text-decoration: none;
}

body.bio-unit2-learning-hub .unit2-command-mini strong a:hover,
body.bio-unit2-learning-hub .unit2-command-mini strong a:focus-visible {
  color: #ffd37a;
  text-decoration: underline;
}

body.bio-unit2-learning-hub .unit2-practice-bridge .unit-content-figure figcaption {
  color: rgba(255, 255, 255, 0.88);
}

body.bio-unit2-learning-hub .unit2-command-panel-cta:hover,
body.bio-unit2-learning-hub .unit2-command-panel-cta:focus-visible {
  color: #ffffff;
  text-decoration: underline;
}

body.bio-unit2-learning-hub .unit2-hub-jump {
  position: sticky;
  top: 64px;
  z-index: 40;
  max-width: var(--max);
  margin: 0 auto;
  padding: 10px var(--space-6);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--border, #e8ecf4);
  backdrop-filter: blur(8px);
}

body.bio-unit2-learning-hub .unit2-hub-jump-inner {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 2px;
  scrollbar-width: thin;
}

body.bio-unit2-learning-hub .unit2-hub-jump-inner a {
  flex: 0 0 auto;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--border, #e8ecf4);
  background: #ffffff;
  color: #0a0f5a;
  font-size: 0.8rem;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

body.bio-unit2-learning-hub .unit2-hub-jump-inner a:hover,
body.bio-unit2-learning-hub .unit2-hub-jump-inner a:focus-visible {
  border-color: #7ba3e8;
  background: #eef4ff;
  outline: none;
}

body.bio-unit2-learning-hub .unit2-command-center {
  padding: 22px 20px 24px;
  border-radius: 20px;
  background:
    radial-gradient(circle at 12% 18%, rgba(250, 204, 21, 0.12), transparent 40%),
    linear-gradient(145deg, #070b43, #0a0f5a 52%, #2a1f6e);
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 20px 48px rgba(10, 15, 90, 0.2);
}

body.bio-unit2-learning-hub .unit2-command-center h2 {
  color: #ffffff;
  margin: 0 0 8px;
}

body.bio-unit2-learning-hub .unit2-command-center .section-eyebrow {
  color: #facc15;
}

body.bio-unit2-learning-hub .unit2-command-center-intro {
  margin: 0 0 18px;
  max-width: 62ch;
  color: rgba(255, 255, 255, 0.88);
  line-height: 1.55;
}

body.bio-unit2-learning-hub .unit2-decision-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

body.bio-unit2-learning-hub .unit2-decision-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 100%;
  padding: 16px 14px;
  border-radius: 16px;
  border: 1px solid rgba(255, 211, 122, 0.28);
  background: rgba(255, 255, 255, 0.07);
}

body.bio-unit2-learning-hub .unit2-decision-card h3 {
  margin: 0;
  color: #ffd37a;
  font-size: 0.95rem;
  line-height: 1.3;
}

body.bio-unit2-learning-hub .unit2-decision-card p {
  margin: 0;
  flex: 1;
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.88rem;
  line-height: 1.5;
}

body.bio-unit2-learning-hub .unit2-decision-card .btn {
  align-self: flex-start;
  margin-top: auto;
}

body.bio-unit2-learning-hub .unit2-decision-card .btn-primary {
  background: linear-gradient(135deg, #facc15, #f59e0b);
  color: #0a0f5a;
  border-color: transparent;
}

body.bio-unit2-learning-hub .unit2-decision-links {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 6px;
}

body.bio-unit2-learning-hub .unit2-decision-links a {
  color: #b9d1ff;
  font-size: 0.84rem;
  font-weight: 700;
  text-decoration: none;
}

body.bio-unit2-learning-hub .unit2-decision-links a:hover,
body.bio-unit2-learning-hub .unit2-decision-links a:focus-visible {
  color: #ffffff;
  text-decoration: underline;
}

body.bio-unit2-learning-hub .unit2-say-fast {
  margin: 16px 0 0;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid #dbeafe;
  background: #f8faff;
}

body.bio-unit2-learning-hub .unit2-say-fast h3 {
  margin: 0 0 8px;
  color: #0a0f5a;
  font-size: 0.92rem;
}

body.bio-unit2-learning-hub .unit2-say-fast ul {
  margin: 0;
  padding-left: 1.1rem;
  color: #1f2545;
  line-height: 1.55;
}

body.bio-unit2-learning-hub .unit2-exam-clue {
  margin: 14px 0 0;
  padding: 12px 14px;
  border-left: 3px solid #f59e0b;
  border-radius: 0 12px 12px 0;
  background: #fff7ed;
  color: #1f2545;
  font-size: 0.9rem;
  line-height: 1.5;
}

body.bio-unit2-learning-hub .unit2-exam-clue strong {
  color: #0a0f5a;
}

body.bio-unit2-learning-hub .unit2-topic-order {
  margin: 0 0 16px;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid var(--border, #e8ecf4);
  background: #f8faff;
}

body.bio-unit2-learning-hub .unit2-topic-order h3 {
  margin: 0 0 8px;
  color: #0a0f5a;
  font-size: 0.95rem;
}

body.bio-unit2-learning-hub .unit2-topic-order ol {
  margin: 0;
  padding-left: 1.25rem;
  color: #1f2545;
  line-height: 1.55;
  font-size: 0.88rem;
}

body.bio-unit2-learning-hub .unit2-test-shortcut {
  margin: 0 0 18px;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px dashed #f59e0b;
  background: #fffbeb;
  color: #1f2545;
  font-size: 0.88rem;
  line-height: 1.5;
}

body.bio-unit2-learning-hub .unit2-test-shortcut strong {
  color: #0a0f5a;
}

body.bio-unit2-learning-hub .unit2-frq-frame {
  margin: 16px 0;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid #c7d2fe;
  background: #eef2ff;
  color: #0a0f5a;
  font-weight: 700;
  line-height: 1.5;
}

body.bio-unit2-learning-hub .unit2-frq-examples {
  display: grid;
  gap: 12px;
  margin-top: 14px;
}

body.bio-unit2-learning-hub .unit2-frq-example {
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--border, #e8ecf4);
  background: #ffffff;
}

body.bio-unit2-learning-hub .unit2-frq-example h4 {
  margin: 0 0 6px;
  color: #0a0f5a;
  font-size: 0.88rem;
}

body.bio-unit2-learning-hub .unit2-frq-example p {
  margin: 0;
  color: #1f2545;
  font-size: 0.88rem;
  line-height: 1.5;
}

body.bio-unit2-learning-hub .diag-results {
  display: none;
  margin-top: 18px;
  padding: 18px 16px;
  border-radius: 16px;
  border: 1px solid #c7d2fe;
  background: linear-gradient(180deg, #f8faff, #ffffff);
}

body.bio-unit2-learning-hub .diag-results.is-visible {
  display: block;
}

body.bio-unit2-learning-hub .diag-results h3 {
  margin: 0 0 8px;
  color: #0a0f5a;
}

body.bio-unit2-learning-hub .diag-results p {
  margin: 0 0 10px;
  color: #1f2545;
  line-height: 1.5;
}

body.bio-unit2-learning-hub .diag-results ul {
  margin: 0 0 14px;
  padding-left: 1.1rem;
  color: #1f2545;
}

body.bio-unit2-learning-hub .diag-score-band {
  padding: 10px 12px;
  border-radius: 10px;
  margin-bottom: 12px;
  font-size: 0.9rem;
  line-height: 1.45;
}

body.bio-unit2-learning-hub .diag-score-band-strong {
  background: #ecfdf5;
  border: 1px solid #86efac;
  color: #14532d;
}

body.bio-unit2-learning-hub .diag-score-band-good {
  background: #eff6ff;
  border: 1px solid #93c5fd;
  color: #1e3a8a;
}

body.bio-unit2-learning-hub .diag-score-band-rebuild {
  background: #fff7ed;
  border: 1px solid #fdba74;
  color: #7c2d12;
}

body.bio-unit2-learning-hub .unit2-practice-bridge {
  padding: 22px 20px;
  border-radius: 20px;
  background:
    radial-gradient(circle at 88% 18%, rgba(250, 204, 21, 0.18), transparent 16rem),
    linear-gradient(135deg, #070b43, #0a0f5a 55%, #101973);
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: #ffffff;
}

body.bio-unit2-learning-hub .unit2-practice-bridge h2 {
  color: #ffffff;
  margin: 0 0 8px;
}

body.bio-unit2-learning-hub .unit2-practice-bridge .section-eyebrow {
  color: #facc15;
}

body.bio-unit2-learning-hub .unit2-practice-bridge p {
  color: rgba(255, 255, 255, 0.9);
  max-width: 62ch;
  line-height: 1.55;
}

body.bio-unit2-learning-hub .unit2-practice-bridge .btn-primary {
  background: linear-gradient(135deg, #facc15, #f59e0b);
  color: #0a0f5a;
  border-color: transparent;
}

body.bio-unit2-learning-hub .unit2-practice-bridge .btn-outline {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.44);
}

body.bio-unit2-learning-hub .unit-content-figure {
  margin: 18px 0 20px;
  text-align: center;
}

body.bio-unit2-learning-hub .unit-content-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--border, #e8ecf4);
  border-radius: 20px;
  box-shadow: 0 14px 34px rgba(10, 15, 90, 0.1);
}

body.bio-unit2-learning-hub .unit-content-figure figcaption {
  margin-top: 8px;
  color: #4a5276;
  font-size: 0.86rem;
  line-height: 1.4;
  text-align: center;
}

body.bio-unit2-learning-hub .study-checklist {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

body.bio-unit2-learning-hub .study-checklist li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  color: #1f2545;
  font-size: 0.86rem;
  line-height: 1.4;
}

body.bio-unit2-learning-hub .study-checklist .check-box {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  margin-top: 1px;
  border-radius: 4px;
  border: 2px solid #cbd5e1;
  background: #ffffff;
}

body.bio-unit2-learning-hub .study-checklist li.is-done .check-box {
  border-color: #16a34a;
  background: #16a34a;
  box-shadow: inset 0 0 0 2px #ffffff;
}

body.bio-unit2-learning-hub .study-checklist li.is-started .check-box {
  border-color: #f59e0b;
  background: #fef3c7;
}

body.bio-unit2-learning-hub .study-check-btn {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  width: 100%;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

body.bio-unit2-learning-hub .study-check-btn:focus-visible {
  outline: 2px solid #2563eb;
  outline-offset: 2px;
  border-radius: 6px;
}

body.bio-unit2-learning-hub .unit2-selected-path {
  margin: 0 0 10px;
  font-size: 0.82rem;
  color: #4a5276;
  line-height: 1.4;
}

body.bio-unit2-learning-hub .unit2-selected-path strong {
  color: #0a0f5a;
}

body.bio-unit2-learning-hub .unit2-choose-path {
  padding-top: 0;
}

body.bio-unit2-learning-hub .unit2-choose-path-intro {
  max-width: 42rem;
  color: #1f2545;
  line-height: 1.55;
}

body.bio-unit2-learning-hub .unit2-path-selector {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 16px 0 18px;
}

body.bio-unit2-learning-hub .unit2-path-option {
  flex: 1 1 160px;
  min-width: 0;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(10, 15, 90, 0.06);
  color: #0a0f5a;
  font-size: 0.88rem;
  font-weight: 700;
  line-height: 1.35;
  text-align: left;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
}

body.bio-unit2-learning-hub .unit2-path-option:hover {
  border-color: #c4b5fd;
  background: rgba(10, 15, 90, 0.08);
}

body.bio-unit2-learning-hub .unit2-path-option.is-active,
body.bio-unit2-learning-hub .unit2-path-option[aria-selected="true"] {
  border-color: #f59e0b;
  background: linear-gradient(145deg, #fff7ed, #fef3c7);
  box-shadow: 0 0 0 1px rgba(245, 158, 11, 0.35);
  color: #7c2d12;
}

body.bio-unit2-learning-hub .unit2-path-option:focus-visible {
  outline: 2px solid #2563eb;
  outline-offset: 2px;
}

body.bio-unit2-learning-hub .unit2-path-plan {
  padding: 20px 18px 18px;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background:
    radial-gradient(circle at 92% 8%, rgba(250, 204, 21, 0.12), transparent 42%),
    linear-gradient(155deg, #2e1065 0%, #1e1b4b 45%, #312e81 100%);
  color: #ffffff;
  box-shadow: 0 16px 36px rgba(49, 46, 129, 0.22);
}

body.bio-unit2-learning-hub .unit2-path-plan-label {
  margin: 0 0 6px;
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #fcd34d;
}

body.bio-unit2-learning-hub .unit2-path-plan h3 {
  margin: 0 0 12px;
  color: #ffffff;
  font-size: 1.25rem;
}

body.bio-unit2-learning-hub .unit2-path-plan ol {
  margin: 0 0 14px;
  padding-left: 1.2rem;
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.55;
}

body.bio-unit2-learning-hub .unit2-path-time {
  margin: 0 0 16px;
  color: rgba(255, 255, 255, 0.88);
  font-size: 0.92rem;
}

body.bio-unit2-learning-hub .unit2-path-plan .hero-ctas {
  margin-bottom: 0 !important;
  flex-wrap: wrap;
}

body.bio-unit2-learning-hub .unit2-path-plan .btn-outline {
  border-color: rgba(255, 255, 255, 0.45);
  color: #ffffff;
}

body.bio-unit2-learning-hub .topic-filter-count {
  margin: 0 0 14px;
  color: #4a5276;
  font-size: 0.88rem;
  font-weight: 600;
}

body.bio-unit2-learning-hub .diag-band-label {
  font-weight: 800;
}

body.bio-unit2-learning-hub .unit2-final-practice-cta {
  padding: 22px 20px;
  border-radius: 20px;
  background:
    radial-gradient(circle at 88% 18%, rgba(250, 204, 21, 0.18), transparent 16rem),
    linear-gradient(135deg, #070b43, #0a0f5a 55%, #101973);
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: #ffffff;
}

body.bio-unit2-learning-hub .unit2-final-practice-cta h2 {
  color: #ffffff;
  margin: 0 0 8px;
}

body.bio-unit2-learning-hub .unit2-final-practice-cta p {
  color: rgba(255, 255, 255, 0.88);
  margin: 0 0 14px;
  max-width: 42rem;
}

body.bio-unit2-learning-hub .unit2-final-practice-cta .btn-outline {
  border-color: rgba(255, 255, 255, 0.45);
  color: #ffffff;
}

@media (max-width: 980px) {
  body.bio-unit2-learning-hub .hero.unit-hero .hero-inner {
    grid-template-columns: 1fr !important;
  }

  body.bio-unit2-learning-hub .unit2-decision-grid {
    grid-template-columns: 1fr;
  }

  body.bio-unit2-learning-hub .unit2-hub-jump {
    top: 56px;
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }
}

@media (max-width: 640px) {
  body.bio-unit2-learning-hub .unit2-command-mini-grid {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  body.bio-unit2-learning-hub .unit2-hub-jump {
    backdrop-filter: none;
  }
}