/* Layout Containers */
.carousel-background,
.search-background,
.welcome-box {
  background-color: #f8f9fa;
  border-radius: 0.75rem;
  padding: 1.5rem;
  margin-bottom: 1rem;
  border: 1px solid #dee2e6;
}

/* Carousel */
.carousel-container {
  position: relative;
}

.carousel-inner {
  padding: 1rem;
}

.carousel-item .row {
  margin: 0 2rem;
}

.carousel-control-prev,
.carousel-control-next {
  width: 4%;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
}

.carousel-control-prev-icon,
.carousel-control-next-icon {
  background-color: rgba(0, 0, 0, 0.5);
  border-radius: 50%;
  padding: 10px;
}

/* Toggle Button */
.rotate {
  transform: rotate(45deg);
  transition: transform 0.3s ease;
}

.active-toggle {
  background-color: #0d6efd !important;
  color: #fff !important;
  border-color: #0d6efd !important;
}

/* Card Styling */
.card {
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
  display: flex;
  flex-direction: column;
  position: relative;
  padding-bottom: 3rem;
}

.card-header {
  background-color: #f8f9fa;
  font-weight: bold;
  border-top-left-radius: 1rem;
  border-top-right-radius: 1rem;
}

.card-title {
  font-size: 1.2rem;
  font-weight: bold;
  margin-bottom: 0.25rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.card-text,
.example-text {
  font-size: 0.9rem;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-box-orient: vertical;
}

/* Badge Styles */
.cefr-badge {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  padding: 0.3rem 0.6rem;
  font-size: 0.75rem;
  font-weight: bold;
  color: #fff;
  border-radius: 0.5rem;
  z-index: 10;
}

.badge-cefr {
  padding: 0.25em 0.5em;
  border-radius: 0.5rem;
  font-size: 0.8em;
  font-weight: bold;
  color: #fff;
}

.badge-n { background-color: #6c757d; }
.level-a1, .level-a2 { background-color: #28a745; }
.level-b1, .level-b2 {
  background-color: #ffc107;
  color: #212529;
}
.level-c1, .level-c2 { background-color: #dc3545; }

/* Button Inside Card */
.card .btn {
  position: absolute;
  bottom: 0.75rem;
  left: 0.75rem;
}

/* Buttons */
.square-btn {
  height: 38px;
  width: 38px;
  padding: 0;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

@media (max-width: 576px) {
  .carousel-item .col {
    flex: 0 0 100%;
    max-width: 100%;
  }
  .carousel-item .row {
    margin: 0; /* remove side margins on mobile */
  }
  .card {
    padding-bottom: 1rem; /* less space below cards on mobile */
  }
}