body {
  background-color: #f8f9fa;
}
.card {
  margin-bottom: 20px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}
.navbar-brand {
  font-weight: bold;
}
textarea {
  resize: vertical;
}

/* Responsive Styles */
@media (max-width: 768px) {
  .card {
    margin-bottom: 15px;
  }
  h1, .h1 {
    font-size: 2rem;
  }
  h2, .h2 {
    font-size: 1.75rem;
  }
  h3, .h3 {
    font-size: 1.5rem;
  }
}

@media (max-width: 576px) {
  .card {
    margin-bottom: 10px;
  }
  h1, .h1 {
    font-size: 1.75rem;
  }
  h2, .h2 {
    font-size: 1.5rem;
  }
  h3, .h3 {
    font-size: 1.25rem;
  }
  .navbar-nav {
    text-align: center;
  }
  .form-group {
    margin-bottom: 1rem;
  }
  .btn {
    width: 100%;
  }
}

.question-media img,
.explanation-media img {
  display: block;
  max-width: 100%;
  height: auto;
  object-fit: contain;
}