/* ==========================================================================
   Biology Admission Written Practice Stylesheet (written.css)
   Mobile-First, Academic-Grade, LaTeX & Table Formatted
   ========================================================================== */

.written-filter-panel {
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-main);
  padding: 10px 14px;
  display: block;
  transition: all 0.2s ease;
}

.written-filter-panel.collapsed {
  display: none;
}

.filter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.filter-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* Written Question Card */
.written-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-main);
  border-radius: var(--radius-md);
  padding: 18px;
  margin-bottom: 20px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.written-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}

.written-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.written-badge-wrap {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.written-num-badge {
  background-color: var(--bg-active);
  color: var(--color-accent);
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid var(--border-main);
}

.written-uni-badge {
  background-color: rgba(15, 118, 110, 0.1);
  color: var(--color-accent);
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid rgba(15, 118, 110, 0.25);
}

.written-q-text {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--text-main);
  margin-bottom: 16px;
  padding-left: 2px;
}

/* Student Drafting Section */
.student-draft-section {
  background-color: var(--bg-hover);
  border: 1px dashed var(--border-main);
  border-radius: var(--radius-sm);
  padding: 12px;
  margin-bottom: 16px;
}

.draft-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.draft-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 6px;
}

.draft-counter {
  font-size: 11px;
  color: var(--text-muted);
}

.written-textarea {
  width: 100%;
  min-height: 90px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-main);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-family: inherit;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-main);
  resize: vertical;
  transition: border-color 0.15s ease;
  box-sizing: border-box;
}

.written-textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(15, 118, 110, 0.15);
}

.draft-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-top: 10px;
  flex-wrap: wrap;
}

.btn-ai-eval {
  background-color: var(--color-accent);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 7px 14px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s ease;
}

.btn-ai-eval:hover {
  background-color: var(--color-accent-hover, #0d9488);
}

.btn-ai-eval:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-model-toggle {
  background-color: var(--bg-surface);
  color: var(--text-main);
  border: 1px solid var(--border-main);
  border-radius: var(--radius-sm);
  padding: 7px 12px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s ease;
}

.btn-model-toggle:hover {
  background-color: var(--bg-active);
}

/* AI Evaluation Feedback Card */
.ai-eval-container {
  margin-top: 14px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(15, 118, 110, 0.3);
  background-color: rgba(15, 118, 110, 0.03);
  padding: 16px;
  animation: fadeIn 0.25s ease-out;
}

.ai-eval-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  border-bottom: 1px solid rgba(15, 118, 110, 0.15);
  padding-bottom: 8px;
}

.ai-eval-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-accent);
  display: flex;
  align-items: center;
  gap: 6px;
}

.eval-score-badge {
  font-size: 13px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
  background-color: var(--color-accent);
  color: #ffffff;
}

.eval-summary-box {
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-main);
  margin-bottom: 12px;
  font-weight: 500;
}

.eval-section-title {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin: 10px 0 4px;
}

.eval-list {
  margin: 0 0 10px 0;
  padding-left: 20px;
  font-size: 13px;
  line-height: 1.5;
}

.eval-list li {
  margin-bottom: 4px;
}

.eval-list.correct li {
  color: var(--color-success);
}

.eval-list.missing li {
  color: var(--color-danger);
}

.eval-tip-box {
  background-color: var(--bg-surface);
  border-left: 3px solid var(--color-accent);
  border-radius: 4px;
  padding: 8px 12px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--text-secondary);
  margin-top: 10px;
}

/* Official Textbook Model Answer Container */
.model-answer-container {
  margin-top: 14px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-main);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  border-left: 4px solid var(--color-success);
  animation: fadeIn 0.2s ease-out;
}

.model-answer-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-success);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.model-answer-body {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-main);
}

.model-answer-body p {
  margin-bottom: 8px;
}

/* Markdown Table in Model Answers */
.model-answer-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
  font-size: 13px;
  line-height: 1.5;
}

.model-answer-body th,
.model-answer-body td {
  border: 1px solid var(--border-main);
  padding: 8px 12px;
  text-align: left;
}

.model-answer-body th {
  background-color: var(--bg-hover);
  font-weight: 600;
  color: var(--text-main);
}

.model-answer-body tr:nth-child(even) {
  background-color: var(--bg-surface);
}

.model-answer-body tr:nth-child(odd) {
  background-color: var(--bg-hover);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Mobile Optimizations */
@media (max-width: 600px) {
  .questions-viewport {
    padding: 6px 6px 72px 6px !important;
  }
  .written-card {
    padding: 10px 10px 12px 10px !important;
    border-radius: 8px !important;
    margin-bottom: 8px !important;
  }
  .written-q-text {
    font-size: 15px !important;
    line-height: 1.58 !important;
    margin-bottom: 10px !important;
  }
  .student-draft-section {
    padding: 8px 10px !important;
    margin-bottom: 10px !important;
  }
  .written-textarea {
    min-height: 75px !important;
    padding: 8px 10px !important;
    font-size: 13.5px !important;
  }
  .draft-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 6px !important;
    margin-top: 8px !important;
  }
  .btn-ai-eval, .btn-model-toggle {
    justify-content: center;
    width: 100%;
    padding: 6px 10px !important;
    font-size: 12px !important;
  }
  .filter-grid {
    grid-template-columns: 1fr;
  }
}