:root {
  /* Main brand colors from your website */
  --accent-color-1: hsl(206, 62%, 45%);
  --accent-blue: hsl(212, 72%, 59%);
  --accent-blue-hover: hsl(210, 56%, 47%);
  --accent-color-2: hsl(0, 64%, 55%);
  --accent-red: hsl(0, 69%, 67%);
  --vista-blue-new: hsl(230, 68%, 65%);

  /* Supporting UI colors */
  --text-dark: #333333;
  --text-light: #666666;
  --bg-light: #f5f7fa;
  --bg-white: #ffffff;
  --border-light: #e0e0e0;
  --border-medium: #cccccc;
  --bg-selected: rgba(212, 225, 252, 0.3);
  --success: #28a745;

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.1);
}

.page-title {
  margin-bottom: 1.5rem;
  color: var(--accent-blue-hover);
  font-size: 1.8rem;
}

/* Cram Setup Container - Main Layout */
.cram-setup-container {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 2rem;
  align-items: start;
}

@media (max-width: 1024px) {
  .cram-setup-container {
    grid-template-columns: 1fr;
  }

  .cram-left-panel {
    position: static !important;
    width: 100% !important;
  }
}

/* Left Panel */
.cram-left-panel {
  background: var(--bg-white);
  border-radius: 8px;
  box-shadow: var(--shadow-md);
  padding: 1.5rem;
  position: sticky;
  top: 100px; /* Stick below the header */
  height: max-content;
}

.cram-stats {
  margin-bottom: 2rem;
  text-align: center;
}

.items-count {
  font-size: 1.1rem;
}

.items-count span {
  font-size: 3rem;
  font-weight: bold;
  color: var(--accent-red);
  display: block;
  margin-bottom: 0.5rem;
}

.items-note {
  color: var(--text-light);
  font-size: 0.9rem;
  margin-top: 0.5rem;
}

.selected-items-list {
  margin-top: 1.5rem;
}

.selected-items-list h2 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: var(--text-dark);
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-light);
}

#selected-items-container {
  max-height: 400px;
  overflow-y: auto;
  padding: 0.5rem 0;
}

.no-items-selected {
  color: var(--text-light);
  font-style: italic;
  text-align: center;
  padding: 2rem 0;
}

.selected-card {
  background-color: var(--bg-light);
  border-radius: 6px;
  padding: 0.75rem 1rem;
  margin-bottom: 0.75rem;
  border-left: 3px solid var(--accent-blue);
  box-shadow: var(--shadow-sm);
  position: relative;
}

.selected-card-title {
  font-weight: bold;
  margin-bottom: 0.25rem;
}

.selected-card-structure {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 0.5rem;
}

.selected-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.selected-card-tag {
  font-size: 0.75rem;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  background-color: var(--bg-light);
  border: 1px solid var(--border-medium);
}

.selected-card-tag.jlpt {
  background-color: var(--accent-blue);
  color: white;
  border: none;
}

.selected-card-tag.parent-collection {
  background-color: var(--vista-blue-new);
  color: white;
  border: none;
}

.selected-card-tag.collection {
  background-color: rgba(212, 225, 252, 0.7);
  color: var(--accent-blue-hover);
  border: 1px solid var(--accent-blue);
}

/* Right Panel */
.cram-right-panel {
  background: var(--bg-white);
  border-radius: 8px;
  box-shadow: var(--shadow-md);
  padding: 1.5rem;
}

/* Common Section Styles */
.cram-section {
  margin-bottom: 2rem;
}

.cram-section h2 {
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
  color: var(--text-dark);
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-light);
}

/* Search Box */
.search-container {
  position: relative;
  margin-bottom: 1.5rem;
}

.search-input {
  width: 100%;
  padding: 0.75rem 1rem;
  padding-right: 2.5rem;
  border: 1px solid var(--border-medium);
  border-radius: 6px;
  font-size: 1rem;
  transition: all 0.3s;
}

.search-input:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(74, 114, 195, 0.2);
}

.clear-search-btn {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-light);
  font-size: 1rem;
  cursor: pointer;
  display: none;
}

.clear-search-btn:hover {
  color: var(--accent-red);
}

/* Tabs */
.content-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 1.5rem;
}

.tab-button {
  background: none;
  border: none;
  padding: 0.8rem 1.5rem;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-light);
  cursor: pointer;
  border-bottom: 3px solid transparent;
  transition: all 0.3s;
}

.tab-button:hover {
  color: var(--accent-blue);
}

.tab-button.active {
  color: var(--accent-blue);
  border-bottom: 3px solid var(--accent-blue);
}

/* Content Sections */
.content-section {
  margin-bottom: 2rem;
}

/* Category/Level Groups */
.category-group,
.level-group {
  margin-bottom: 2rem;
}

.parent-category {
  background-color: var(--bg-light);
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 2rem;
}

.child-category {
  background-color: var(--bg-white);
  border-radius: 6px;
  padding: 1.25rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.category-header,
.level-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.category-header h3,
.level-header h3 {
  font-size: 1.2rem;
  color: var(--accent-blue-hover);
}

.category-header h4,
.level-header h4 {
  font-size: 1.1rem;
  color: var(--text-dark);
}

.category-actions,
.level-actions {
  display: flex;
  align-items: center;
}

.point-count {
  color: var(--text-light);
  font-size: 0.9rem;
  margin-right: 1rem;
}

.select-all-btn,
.select-all-parent-btn {
  background: none;
  border: none;
  color: var(--accent-blue);
  font-weight: 500;
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  transition: all 0.2s;
}

.select-all-btn:hover,
.select-all-parent-btn:hover {
  color: var(--accent-blue-hover);
  text-decoration: underline;
}

/* Grammar Points Grid */
.grammar-points-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1rem;
}

.grammar-point-card {
  display: flex;
  padding: 1rem;
  border: 1px solid var(--border-light);
  border-radius: 6px;
  background-color: var(--bg-white);
  cursor: pointer;
  transition: all 0.2s;
  align-items: flex-start;
}

.grammar-point-card:hover {
  border-color: var(--accent-blue);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.card-checkbox {
  margin-right: 0.75rem;
  padding-top: 0.25rem;
}

/* Custom Checkbox */
.card-checkbox input[type="checkbox"] {
  position: relative;
  width: 18px;
  height: 18px;
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  outline: none;
  border: 2px solid var(--border-medium);
  border-radius: 4px;
  transition: all 0.2s;
  cursor: pointer;
}

.card-checkbox input[type="checkbox"]:checked {
  background-color: var(--accent-blue);
  border-color: var(--accent-blue);
}

.card-checkbox input[type="checkbox"]:checked::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 5px;
  height: 10px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.card-content {
  flex-grow: 1;
}

.card-content h4 {
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.structure {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 0.5rem;
}

.jlpt-badge {
  display: inline-block;
  font-size: 0.75rem;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  background-color: var(--accent-blue);
  color: white;
}

/* Grammar point card when selected */
.grammar-point-card.selected {
  background-color: var(--bg-selected);
  border-color: var(--accent-blue);
}

/* Additional Settings */
.setting-group {
  margin-bottom: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}

.setting-group label {
  font-weight: 500;
  margin-right: 1rem;
  margin-bottom: 0.5rem;
}

.number-input {
  display: flex;
  align-items: center;
  margin-right: 1rem;
  margin-bottom: 0.5rem;
}

.number-input button {
  width: 32px;
  height: 32px;
  background-color: var(--bg-light);
  border: 1px solid var(--border-medium);
  color: var(--text-dark);
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
}

.number-input button.decrease {
  border-radius: 4px 0 0 4px;
}

.number-input button.increase {
  border-radius: 0 4px 4px 0;
}

.number-input button:hover {
  background-color: var(--accent-blue);
  color: white;
  border-color: var(--accent-blue);
}

.number-input input {
  width: 50px;
  height: 32px;
  text-align: center;
  border: 1px solid var(--border-medium);
  border-left: none;
  border-right: none;
  font-size: 1rem;
}

.setting-description {
  flex-basis: 100%;
  font-size: 0.9rem;
  color: var(--text-light);
  margin-top: 0.5rem;
}

/* Start Button */
.cram-actions {
  text-align: center;
  margin-top: 2rem;
}

.start-cram-button {
  background-color: var(--accent-red);
  color: white;
  border: none;
  border-radius: 6px;
  padding: 0.9rem 2rem;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  min-width: 250px;
}

.start-cram-button:hover {
  background-color: var(--accent-color-2);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.start-cram-button:disabled {
  background-color: #f5acac;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* No Results Message */
.no-results-message {
  text-align: center;
  padding: 2rem;
  color: var(--text-light);
  font-style: italic;
}

/* Nonce field styles */
input[type="hidden"] {
  display: none;
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-light);
}

::-webkit-scrollbar-thumb {
  background-color: var(--border-medium);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background-color: var(--text-light);
}

/* Mobile optimizations */
@media (max-width: 768px) {
  .grammar-points-grid {
    grid-template-columns: 1fr;
  }

  .category-header,
  .level-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .category-actions,
  .level-actions {
    margin-top: 0.5rem;
  }

  nav ul {
    flex-direction: column;
  }

  nav ul li {
    margin-left: 0;
    margin-bottom: 0.5rem;
  }
}