/**
 * CD-IELTS Authentic Summary / Table Completion Word Bank Stylesheet
 * Interactive Draggable & Click-to-Place Token Tray with Inline Dropzones
 * Supports Word Display in both Tray Chips and Inline Dropzone Blanks
 * Design System Harmonized with English Mastery Hub Design Tokens
 */

/* Options Tray */
.cd-ielts-bank-tray {
  background-color: #f8fafc;
  border: 1.5px solid #cbd5e1;
  border-radius: 12px;
  padding: 1rem;
  margin-bottom: 1.25rem;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.05);
}

.cd-ielts-bank-tray-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 0.8125rem;
  font-weight: 700;
  color: #1e293b;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.cd-ielts-bank-tray-hint {
  font-size: 0.75rem;
  font-weight: 500;
  color: #64748b;
  text-transform: none;
}

.cd-ielts-bank-chips-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* Individual Bank Chip */
.cd-ielts-bank-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.75rem;
  background-color: #ffffff;
  border: 1.5px solid #cbd5e1;
  border-radius: 8px;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 0.8125rem;
  font-weight: 600;
  color: #334155;
  cursor: grab;
  user-select: none;
  transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}

.cd-ielts-bank-chip:active {
  cursor: grabbing;
}

.cd-ielts-bank-chip:hover:not(.is-used):not(:disabled) {
  background-color: #f1f5f9;
  border-color: #94a3b8;
  color: #0f172a;
  transform: translateY(-1px);
}

.cd-ielts-bank-chip .bank-chip-letter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 4px;
  background-color: #e0f2fe;
  color: #0369a1;
  font-size: 0.75rem;
  font-weight: 800;
  flex-shrink: 0;
}

.cd-ielts-bank-chip .bank-chip-text {
  white-space: nowrap;
}

/* Selected chip waiting for target gap click */
.cd-ielts-bank-chip.is-active-source {
  background-color: #e0f2fe !important;
  border-color: #0284c7 !important;
  color: #0369a1 !important;
  box-shadow: 0 0 0 2px rgba(2, 132, 199, 0.2) !important;
  animation: pulse-border 1.5s infinite;
}

@keyframes pulse-border {
  0%, 100% { border-color: #0284c7; }
  50% { border-color: #38bdf8; }
}

/* Chip is placed in a gap */
.cd-ielts-bank-chip.is-used {
  opacity: 0.45;
  cursor: not-allowed;
  background-color: #f1f5f9;
  border-color: #e2e8f0;
  color: #94a3b8;
}

.cd-ielts-bank-chip.is-used .bank-chip-letter {
  background-color: #e2e8f0;
  color: #94a3b8;
}

/* Inline Summary Dropzone Target */
.cd-ielts-gap-dropzone {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  min-width: 120px;
  min-height: 32px;
  padding: 0.2rem 0.5rem;
  margin: 0 0.25rem;
  vertical-align: middle;
  background-color: #ffffff;
  border: 1.5px dashed #94a3b8;
  border-radius: 6px;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 0.8125rem;
  font-weight: 600;
  color: #64748b;
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
}

.cd-ielts-gap-dropzone:hover {
  background-color: #f8fafc;
  border-color: #0284c7;
}

.cd-ielts-gap-dropzone.drag-over {
  background-color: #e0f2fe;
  border-color: #0284c7;
  border-style: solid;
}

.cd-ielts-gap-dropzone.has-token {
  border-style: solid;
  border-color: #0284c7;
  background-color: #f0f9ff;
  color: #0369a1;
}

.cd-ielts-gap-dropzone .gap-qnum {
  font-size: 0.75rem;
  font-weight: 700;
  color: #0284c7;
  flex-shrink: 0;
}

.cd-ielts-gap-dropzone .gap-token-letter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 4px;
  background-color: #0284c7;
  color: #ffffff;
  font-size: 0.6875rem;
  font-weight: 800;
  flex-shrink: 0;
}

.cd-ielts-gap-dropzone .gap-token-text {
  font-size: 0.8125rem;
  font-weight: 700;
  color: #0369a1;
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.cd-ielts-gap-dropzone .gap-remove-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background-color: transparent;
  color: #64748b;
  font-size: 0.75rem;
  line-height: 1;
  border: none;
  cursor: pointer;
  margin-left: auto;
  transition: all 0.15s ease;
  flex-shrink: 0;
}

.cd-ielts-gap-dropzone .gap-remove-btn:hover {
  background-color: #fee2e2;
  color: #ef4444;
}

/* Graded Review States */
.cd-ielts-gap-dropzone.is-correct {
  background-color: #ecfdf5 !important;
  border-color: #10b981 !important;
  color: #047857 !important;
}

.cd-ielts-gap-dropzone.is-correct .gap-token-letter {
  background-color: #10b981 !important;
}

.cd-ielts-gap-dropzone.is-correct .gap-token-text {
  color: #047857 !important;
}

.cd-ielts-gap-dropzone.is-incorrect {
  background-color: #fef2f2 !important;
  border-color: #ef4444 !important;
  color: #b91c1c !important;
}

.cd-ielts-gap-dropzone.is-incorrect .gap-token-letter {
  background-color: #ef4444 !important;
}

.cd-ielts-gap-dropzone.is-incorrect .gap-token-text {
  color: #b91c1c !important;
}

/* Dark Mode Harmonization */
.theme-dark .cd-ielts-bank-tray,
[data-theme='dark'] .cd-ielts-bank-tray,
.dark .cd-ielts-bank-tray,
body.dark-mode .cd-ielts-bank-tray {
  background-color: #1e293b;
  border-color: #334155;
}

.theme-dark .cd-ielts-bank-tray-header,
[data-theme='dark'] .cd-ielts-bank-tray-header,
.dark .cd-ielts-bank-tray-header,
body.dark-mode .cd-ielts-bank-tray-header {
  color: #f8fafc;
}

.theme-dark .cd-ielts-bank-chip,
[data-theme='dark'] .cd-ielts-bank-chip,
.dark .cd-ielts-bank-chip,
body.dark-mode .cd-ielts-bank-chip {
  background-color: #0f172a;
  border-color: #334155;
  color: #e2e8f0;
}

.theme-dark .cd-ielts-bank-chip:hover:not(.is-used):not(:disabled),
[data-theme='dark'] .cd-ielts-bank-chip:hover:not(.is-used):not(:disabled),
.dark .cd-ielts-bank-chip:hover:not(.is-used):not(:disabled),
body.dark-mode .cd-ielts-bank-chip:hover:not(.is-used):not(:disabled) {
  background-color: #1e293b;
  border-color: #475569;
}

.theme-dark .cd-ielts-gap-dropzone,
[data-theme='dark'] .cd-ielts-gap-dropzone,
.dark .cd-ielts-gap-dropzone,
body.dark-mode .cd-ielts-gap-dropzone {
  background-color: #0f172a;
  border-color: #475569;
  color: #94a3b8;
}

.theme-dark .cd-ielts-gap-dropzone .gap-token-text,
[data-theme='dark'] .cd-ielts-gap-dropzone .gap-token-text,
.dark .cd-ielts-gap-dropzone .gap-token-text,
body.dark-mode .cd-ielts-gap-dropzone .gap-token-text {
  color: #7dd3fc;
}

.theme-dark .cd-ielts-gap-dropzone.has-token,
[data-theme='dark'] .cd-ielts-gap-dropzone.has-token,
.dark .cd-ielts-gap-dropzone.has-token,
body.dark-mode .cd-ielts-gap-dropzone.has-token {
  background-color: rgba(2, 132, 199, 0.2) !important;
  border-color: #38bdf8 !important;
  color: #7dd3fc !important;
}

.theme-dark .cd-ielts-gap-dropzone.is-correct,
[data-theme='dark'] .cd-ielts-gap-dropzone.is-correct,
.dark .cd-ielts-gap-dropzone.is-correct,
body.dark-mode .cd-ielts-gap-dropzone.is-correct {
  background-color: rgba(16, 185, 129, 0.2) !important;
  border-color: #34d399 !important;
  color: #6ee7b7 !important;
}

.theme-dark .cd-ielts-gap-dropzone.is-incorrect,
[data-theme='dark'] .cd-ielts-gap-dropzone.is-incorrect,
.dark .cd-ielts-gap-dropzone.is-incorrect,
body.dark-mode .cd-ielts-gap-dropzone.is-incorrect {
  background-color: rgba(239, 68, 68, 0.2) !important;
  border-color: #f87171 !important;
  color: #fca5a5 !important;
}

/* Hide original static option box/table cleanly */
.cd-ielts-bank-hidden,
div.cd-ielts-bank-hidden,
table.cd-ielts-bank-hidden,
.overflow-x-auto.cd-ielts-bank-hidden {
  display: none !important;
  visibility: hidden !important;
  height: 0 !important;
  overflow: hidden !important;
  margin: 0 !important;
  padding: 0 !important;
}


/* Mobile Summary Bank & Dropzones Hardening (<= 640px) */
@media (max-width: 640px) {
  .cd-ielts-bank-tray {
    padding: 0.65rem 0.75rem !important;
  }
  .cd-ielts-bank-chips-grid {
    gap: 0.35rem !important;
  }
  .cd-ielts-bank-chip {
    padding: 0.3rem 0.5rem !important;
    font-size: 0.75rem !important;
  }
  .cd-ielts-gap-dropzone {
    min-width: 95px !important;
    min-height: 28px !important;
    padding: 0.15rem 0.35rem !important;
    font-size: 0.75rem !important;
    margin: 0.1rem 0.15rem !important;
  }
}