.hub,
.quiz-main {
  max-width: 100%;
}

.hub-cards,
.exam-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.hub-card,
.exam-card,
.quiz-option {
  border: 1px solid var(--line);
  background: white;
  color: var(--ink);
  text-decoration: none;
  box-shadow: var(--shadow);
}

.hub-card,
.exam-card {
  display: block;
  padding: 1.25rem;
}

.hub-card:hover,
.exam-card:hover {
  border-color: var(--brand2);
  transform: translateY(-2px);
}

.hub-card strong,
.exam-card strong {
  display: block;
  color: var(--brand);
  font: 700 .8rem system-ui, sans-serif;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.hub-card span,
.exam-card span {
  display: block;
  margin-top: .55rem;
  font-size: 1.12rem;
}

.quiz-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 2rem;
  font: 600 .8rem system-ui, sans-serif;
}

.quiz-nav a,
.quiz-link {
  color: var(--brand);
}

.quiz-intro {
  margin-bottom: 2rem;
}

.quiz-intro p,
.quiz-feedback,
.quiz-result {
  font-family: system-ui, sans-serif;
}

.quiz-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin: 1.5rem 0;
}

.quiz-button {
  border: 0;
  border-radius: 999px;
  padding: .7rem 1rem;
  background: var(--brand);
  color: white;
  cursor: pointer;
  font: 700 .85rem system-ui, sans-serif;
}

.quiz-button.secondary {
  background: var(--soft);
  color: var(--brand);
}

.quiz-progress {
  color: var(--muted);
  font: 700 .8rem system-ui, sans-serif;
  text-transform: uppercase;
  letter-spacing: .08em;
}

.quiz-question {
  margin: .5rem 0 1.5rem;
  font: 700 clamp(1.35rem, 2.2vw, 2rem)/1.3 system-ui, -apple-system, 'Segoe UI', sans-serif;
  font-size: clamp(2rem, 3.5vw, 3rem);
  overflow-wrap: anywhere;
}

.quiz-options {
  display: grid;
  gap: .75rem;
}

.quiz-option {
  width: 100%;
  padding: 1rem;
  text-align: left;
  cursor: pointer;
  font: .95rem/1.45 system-ui, -apple-system, 'Segoe UI', sans-serif;
}

.quiz-option:hover:not(:disabled) {
  border-color: var(--brand2);
}

.quiz-option:disabled {
  cursor: default;
}

.quiz-option.correct {
  border-color: #43845a;
  background: #e8f4eb;
}

.quiz-option.incorrect {
  border-color: #b44a4a;
  background: #fbeaea;
}

.quiz-feedback {
  margin-top: 1.25rem;
  padding: 1rem;
  border-left: 4px solid var(--brand2);
  background: var(--soft);
}

.quiz-feedback strong {
  color: var(--brand);
}

.quiz-result {
  padding: 1.5rem;
  border: 1px solid var(--line);
  background: var(--soft);
}

.quiz-score {
  margin: .25rem 0;
  color: var(--brand);
  font: 700 2rem system-ui, sans-serif;
}

.quiz-passed {
  color: #43845a;
  font-weight: 700;
}

.quiz-failed {
  color: #a32929;
  font-weight: 700;
}

@media (max-width: 600px) {
  .quiz-nav {
    align-items: flex-start;
    flex-direction: column;
  }
}