/* Quiz library — aligned with main app (navy #172671, card layout) */
:root {
  --qg-navy: #172671;
  --qg-navy-hover: #121d4d;
  --qg-text: #0f172a;
  --qg-muted: #475569;
  --qg-dt: #172671;
  --qg-dd: #334155;
  --qg-border: #e2e8f0;
  --qg-card: #ffffff;
  --qg-section-bg: #f1f5f9;
  --qg-radius: 0.75rem;
}

.quiz-lib-section {
  background: linear-gradient(180deg, #f8fafc 0%, var(--qg-section-bg) 100%);
  padding: 2.5rem 1rem 3.5rem;
  border-top: 1px solid var(--qg-border);
}

.quiz-lib-inner {
  max-width: min(96%, 72rem);
  margin: 0 auto;
}

.quiz-lib-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.quiz-lib-title {
  font-size: clamp(1.75rem, 2.5vw, 2.25rem);
  font-weight: 700;
  color: var(--qg-navy);
  margin: 0 0 0.75rem;
  line-height: 1.2;
}

.quiz-lib-subtitle {
  font-size: clamp(1.05rem, 1.4vw, 1.2rem);
  color: var(--qg-muted);
  max-width: 42rem;
  margin: 0 auto;
  line-height: 1.55;
}

.quiz-lib-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .quiz-lib-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .quiz-lib-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.quiz-lib-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: var(--qg-card);
  border: 1px solid var(--qg-border);
  border-radius: var(--qg-radius);
  padding: 1.25rem;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.06);
  transition: box-shadow 0.2s ease;
}

.quiz-lib-card:hover {
  box-shadow: 0 8px 24px rgba(23, 38, 113, 0.12);
}

.quiz-lib-card-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--qg-text);
  margin: 0 0 0.5rem;
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.quiz-lib-card-meta {
  font-size: 1rem;
  color: var(--qg-muted);
  margin: 0 0 1rem;
  flex: 1;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.quiz-lib-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem 1.25rem;
  margin: 0 0 1.25rem;
  font-size: 1rem;
}

.quiz-lib-stats dt {
  font-weight: 700;
  color: var(--qg-dt);
  margin: 0;
}

.quiz-lib-stats dd {
  margin: 0.15rem 0 0;
  color: var(--qg-dd);
}

.quiz-lib-btn {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.5rem 1rem;
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  background: var(--qg-navy);
  border-radius: 0.5rem;
  text-decoration: none;
  transition: background 0.15s ease;
}

.quiz-lib-btn:hover {
  background: var(--qg-navy-hover);
  color: #fff;
}

.quiz-lib-btn:focus-visible {
  outline: 2px solid var(--qg-navy);
  outline-offset: 2px;
}

.quiz-lib-load-more {
  margin-top: 2.5rem;
  display: flex;
  justify-content: center;
}

.quiz-lib-load-more button {
  cursor: pointer;
  border: 2px solid var(--qg-navy);
  background: #fff;
  color: var(--qg-navy);
  font-size: 1rem;
  font-weight: 600;
  padding: 0.625rem 1.5rem;
  border-radius: 0.5rem;
  transition: background 0.15s ease;
}

.quiz-lib-load-more button:hover {
  background: #f8fafc;
}

.quiz-lib-load-more button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.quiz-lib-loading,
.quiz-lib-empty {
  text-align: center;
  padding: 2rem 1rem;
  font-size: 1.0625rem;
  color: var(--qg-navy);
}

.quiz-lib-empty {
  color: var(--qg-muted);
  border: 1px dashed #cbd5e1;
  border-radius: var(--qg-radius);
  background: #f8fafc;
  max-width: 40rem;
  margin: 0 auto;
}

.quiz-lib-error {
  max-width: 40rem;
  margin: 0 auto;
  padding: 1rem 1.25rem;
  border-radius: 0.5rem;
  border: 1px solid #fecaca;
  background: #fef2f2;
  color: #991b1b;
  text-align: center;
}

.quiz-lib-append-error {
  max-width: 100%;
  margin-top: 1rem;
}

.quiz-lib-error strong {
  display: block;
  margin-bottom: 0.35rem;
  color: #7f1d1d;
}

html[dir="rtl"] .quiz-lib-stats {
  text-align: right;
}