/* AP Bio Unit 1 hub — layout extras on top of csp-unit1-hub (unit1-learning-hub) */

body.bio-unit1-learning-hub .unit-related-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
}

body.bio-unit1-learning-hub .unit-related-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  overflow: hidden;
  color: inherit;
  text-decoration: none;
  background: #ffffff;
  border: 1px solid var(--border, #e8ecf4);
  border-radius: 20px;
  box-shadow: 0 12px 30px rgba(10, 15, 90, 0.08);
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

body.bio-unit1-learning-hub .unit-related-card:hover,
body.bio-unit1-learning-hub .unit-related-card:focus-visible {
  transform: translateY(-3px);
  border-color: #b9d1ff;
  box-shadow: 0 18px 42px rgba(10, 15, 90, 0.13);
}

body.bio-unit1-learning-hub .unit-related-card:focus-visible {
  outline: 3px solid #7ba3e8;
  outline-offset: 3px;
}

body.bio-unit1-learning-hub .unit-related-thumb {
  margin: 0;
  background: #0a0f5a;
}

body.bio-unit1-learning-hub .unit-related-thumb img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

body.bio-unit1-learning-hub .unit-related-thumb figcaption {
  padding: 6px 8px;
  color: #4a5276;
  background: #f8fafc;
  border-top: 1px solid var(--border, #e8ecf4);
  font-size: 0.75rem;
  line-height: 1.35;
  text-align: center;
}

body.bio-unit1-learning-hub .unit-content-figure {
  margin: 18px 0 20px;
  text-align: center;
}

body.bio-unit1-learning-hub .unit-content-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--border, #e8ecf4);
  border-radius: 20px;
  box-shadow: 0 14px 34px rgba(10, 15, 90, 0.1);
}

body.bio-unit1-learning-hub .unit-content-figure figcaption {
  margin-top: 8px;
  color: #4a5276;
  font-size: 0.86rem;
  line-height: 1.4;
  text-align: center;
}

body.bio-unit1-learning-hub .unit-related-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 8px;
  padding: 14px;
}

body.bio-unit1-learning-hub .unit-related-badge {
  width: fit-content;
  padding: 4px 8px;
  color: #1e40af;
  background: #eef4ff;
  border: 1px solid #dbeafe;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 900;
}

body.bio-unit1-learning-hub .unit-related-card h3 {
  margin: 0;
  color: #0a0f5a;
  font-size: 1rem;
  line-height: 1.2;
}

body.bio-unit1-learning-hub .unit-related-card p {
  margin: 0;
  color: #1f2545;
  font-size: 0.9rem;
  line-height: 1.5;
}

body.bio-unit1-learning-hub .unit-related-link {
  margin-top: auto;
  color: #0a0f5a;
  font-size: 0.88rem;
  font-weight: 900;
}

body.bio-unit1-learning-hub .unit-practice-bridge {
  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);
  box-shadow: 0 20px 48px rgba(10, 15, 90, 0.18);
  color: #ffffff;
}

body.bio-unit1-learning-hub .unit-practice-bridge h2 {
  color: #ffffff;
}

body.bio-unit1-learning-hub .unit-practice-bridge .section-eyebrow {
  color: #facc15;
}

body.bio-unit1-learning-hub .unit-practice-bridge p {
  color: rgba(255, 255, 255, 0.9);
  max-width: 62ch;
}

body.bio-unit1-learning-hub .unit-practice-bridge .unit-content-figure figcaption {
  color: rgba(255, 255, 255, 0.88);
}

body.bio-unit1-learning-hub .unit-practice-bridge .btn.btn-primary {
  background: linear-gradient(135deg, #facc15, #f59e0b);
  color: #0a0f5a;
  border-color: transparent;
}

body.bio-unit1-learning-hub .unit-practice-bridge .btn.btn-outline {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.44);
}

body.bio-unit1-learning-hub .unit-practice-bridge .btn.btn-outline:hover,
body.bio-unit1-learning-hub .unit-practice-bridge .btn.btn-outline:focus-visible {
  color: #0a0f5a;
  background: #ffffff;
  border-color: #ffffff;
}

@media (max-width: 980px) {
  body.bio-unit1-learning-hub .unit-related-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 700px) {
  body.bio-unit1-learning-hub .unit-related-grid {
    grid-template-columns: 1fr;
  }
}

/* Bottom-of-page sequential learning path tiles */
body.bio-unit1-learning-hub .unit-learning-journey {
  background: linear-gradient(180deg, #f8faff 0%, #ffffff 100%);
  border: 1px solid #dbe2f2;
  border-radius: 20px;
  padding: 22px 20px 24px;
  margin-top: 8px;
}

body.bio-unit1-learning-hub .unit-learning-journey h2 {
  color: #0a0f5a;
  margin: 0 0 8px;
}

body.bio-unit1-learning-hub .unit-learning-journey .hub-intro {
  margin: 0 0 16px;
  color: #4a5276;
  max-width: 68ch;
  line-height: 1.6;
}

body.bio-unit1-learning-hub .unit-journey-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

body.bio-unit1-learning-hub .unit-journey-tile {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 44px;
  padding: 14px 12px;
  text-decoration: none;
  color: #0a0f5a;
  background: #ffffff;
  border: 2px solid #e2e8f0;
  border-radius: 16px;
  transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

body.bio-unit1-learning-hub .unit-journey-tile:hover,
body.bio-unit1-learning-hub .unit-journey-tile:focus-visible {
  border-color: #2f66d0;
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(47, 102, 208, 0.12);
  color: #0a0f5a;
  outline: none;
}

body.bio-unit1-learning-hub .unit-journey-tile:focus-visible {
  outline: 3px solid #7ba3e8;
  outline-offset: 2px;
}

body.bio-unit1-learning-hub .unit-journey-tile--featured {
  border-color: #93c5fd;
  background: linear-gradient(145deg, #eff6ff, #ffffff);
}

body.bio-unit1-learning-hub .unit-journey-step {
  font-size: 0.66rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #b45309;
}

body.bio-unit1-learning-hub .unit-journey-icon {
  font-size: 1.35rem;
  line-height: 1;
}

body.bio-unit1-learning-hub .unit-journey-tile strong {
  font-size: 0.9rem;
  line-height: 1.3;
  color: #0a0f5a;
}

body.bio-unit1-learning-hub .unit-journey-tile span:last-child {
  font-size: 0.76rem;
  line-height: 1.4;
  color: #4a5276;
}

@media (max-width: 980px) {
  body.bio-unit1-learning-hub .unit-journey-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  body.bio-unit1-learning-hub .unit-journey-grid {
    grid-template-columns: 1fr;
  }
}