/* "Find me a book" (BookFinder/Index): the request box and the books found,
   each with why it fits when AI chose it. */

.bf-hero {
  margin: 1.5rem 0;
  padding: 2.25rem 2.25rem 1.75rem;
  border-radius: 1.25rem;
  color: #fff;
  background:
    radial-gradient(circle at 85% 15%, rgba(255, 255, 255, 0.18), transparent 40%),
    linear-gradient(135deg, #0f766e, #1d4ed8 60%, #312e81);
  text-align: center;
}

.bf-eyebrow {
  display: inline-block;
  padding: 0.25rem 0.8rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.15);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.bf-hero h1 {
  margin: 0.5rem 0;
  color: #fff;
  font-size: clamp(1.7rem, 1.3rem + 1.8vw, 2.6rem);
  font-weight: 900;
}

.bf-hero > p {
  max-width: 40rem;
  margin: 0 auto 1.25rem;
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.05rem;
}

.bf-form {
  display: flex;
  gap: 0.6rem;
  max-width: 46rem;
  margin: 0 auto;
  padding: 0.5rem;
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.16);
}

.bf-form textarea {
  flex: 1;
  min-width: 0;
  min-height: 3.25rem;
  padding: 0.7rem 0.9rem;
  border: 0;
  border-radius: 0.7rem;
  font-size: 1.05rem;
  resize: vertical;
}

.bf-form .btn-light {
  align-self: stretch;
  color: #1d4ed8;
  white-space: nowrap;
}

.bf-spinner {
  display: none;
  width: 1rem;
  height: 1rem;
  margin-left: 0.4rem;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  vertical-align: -0.15rem;
  animation: bf-spin 0.8s linear infinite;
}

.is-busy .bf-spinner {
  display: inline-block;
}

@keyframes bf-spin {
  to {
    transform: rotate(360deg);
  }
}

.bf-examples {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.45rem;
  margin-top: 1rem;
}

.bf-examples a {
  padding: 0.3rem 0.8rem;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 999px;
  color: #fff;
  font-size: 0.88rem;
  text-decoration: none;
}

.bf-examples a:hover {
  background: rgba(255, 255, 255, 0.15);
}

.bf-results-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.bf-results-head h2 {
  margin: 0;
  font-size: 1.4rem;
  font-weight: 800;
}

.bf-understood,
.bf-message {
  margin: 0.25rem 0 0;
  color: #374151;
}

.bf-how {
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  background: var(--bb-blue-50);
  color: var(--bb-blue-700);
  font-size: 0.82rem;
  font-weight: 700;
}

.bf-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(11rem, 1fr));
  gap: 1rem;
}

.bf-item {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.bf-why {
  margin: 0;
  padding: 0.5rem 0.65rem;
  border-radius: 0.6rem;
  background: #fffbeb;
  color: #78350f;
  font-size: 0.85rem;
  line-height: 1.35;
}

.bf-empty {
  padding: 1.5rem;
  border-radius: 1rem;
  background: #fff;
  text-align: center;
}

@media (max-width: 575.98px) {
  .bf-hero {
    padding: 1.5rem 1rem;
  }

  .bf-form {
    flex-direction: column;
  }
}