/* ========== BOOKS STUDIO PAGE ========== */

/* Layout */
.bs-container {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 0;
  height: calc(100vh - 80px);
  overflow: hidden;
}

/* ===== Sidebar ===== */
.bs-sidebar {
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.bs-sidebar-header {
  padding: 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.bs-sidebar-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.bs-new-btn {
  background: var(--primary);
  color: #000;
  border: none;
  border-radius: 8px;
  padding: 6px 14px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s;
}
.bs-new-btn:hover { opacity: 0.85; }
.bs-search {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
  color: var(--text);
  font-size: 13px;
  box-sizing: border-box;
  outline: none;
  transition: border-color 0.2s;
}
.bs-search:focus { border-color: var(--primary); }
.bs-filter-row {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}
.bs-filter-pill {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 3px 10px;
  font-size: 11px;
  color: var(--text-dim);
  cursor: pointer;
  transition: all 0.2s;
}
.bs-filter-pill:hover { border-color: var(--primary); color: var(--text); }
.bs-filter-pill.active {
  background: var(--primary-dim);
  border-color: var(--primary);
  color: var(--primary);
  font-weight: 600;
}

/* Project List */
.bs-project-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}
.bs-project-card {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  margin-bottom: 6px;
  cursor: pointer;
  transition: all 0.2s;
}
.bs-project-card:hover { border-color: var(--primary); background: rgba(0,212,255,0.04); }
.bs-project-card.active { border-color: var(--primary); background: var(--primary-dim); }
.bs-project-card-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.bs-project-card-meta {
  font-size: 11px;
  color: var(--text-dim);
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}
.bs-project-card-progress {
  height: 3px;
  background: var(--surface3);
  border-radius: 2px;
  overflow: hidden;
}
.bs-project-card-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 2px;
  transition: width 0.3s;
}

/* Status chips */
.bs-status {
  display: inline-block;
  font-size: 10px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.bs-status-draft { background: rgba(107,114,128,0.15); color: var(--text-dim); }
.bs-status-writing { background: var(--primary-dim); color: var(--primary); }
.bs-status-editing { background: rgba(245,158,11,0.15); color: var(--warning); }
.bs-status-auditing { background: rgba(124,58,237,0.15); color: var(--accent); }
.bs-status-done { background: var(--success-dim); color: var(--success); }
.bs-status-published { background: var(--success-dim); color: var(--success); }

/* ===== Main Content Area ===== */
.bs-main {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.bs-main-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.bs-main-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
}
.bs-main-subtitle {
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 2px;
}
.bs-main-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}
.bs-action-btn {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 14px;
  font-size: 12px;
  color: var(--text);
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}
.bs-action-btn:hover { border-color: var(--primary); color: var(--primary); }
.bs-action-btn.primary {
  background: var(--primary);
  color: #000;
  border-color: var(--primary);
  font-weight: 600;
}

/* Tabs */
.bs-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border);
  padding: 0 20px;
  background: var(--surface);
}
.bs-tab {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--text-dim);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
  white-space: nowrap;
}
.bs-tab:hover { color: var(--text); }
.bs-tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  font-weight: 600;
}

/* Tab Content */
.bs-tab-content {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
}

/* ===== KPI Row ===== */
.bs-kpi-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}
.bs-kpi {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
  text-align: center;
}
.bs-kpi-value {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
}
.bs-kpi-label {
  font-size: 11px;
  color: var(--text-dim);
  margin-top: 2px;
}

/* ===== Chapter Table ===== */
.bs-chapter-table {
  width: 100%;
  border-collapse: collapse;
}
.bs-chapter-table th {
  text-align: left;
  font-size: 11px;
  color: var(--text-dim);
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.bs-chapter-table td {
  padding: 10px 12px;
  font-size: 13px;
  color: var(--text);
  border-bottom: 1px solid rgba(55,65,81,0.3);
}
.bs-chapter-table tr:hover td { background: rgba(0,212,255,0.03); }
.bs-chapter-table .bs-ch-num {
  font-weight: 700;
  color: var(--primary);
  width: 40px;
}

/* ===== Score Heatmap ===== */
.bs-heatmap {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}
.bs-heatmap th {
  padding: 6px 8px;
  font-size: 10px;
  color: var(--text-dim);
  font-weight: 600;
  text-align: center;
}
.bs-heatmap td {
  padding: 6px 8px;
  text-align: center;
  font-weight: 600;
  border: 1px solid rgba(55,65,81,0.2);
}
.bs-heatmap-green { background: rgba(16,185,129,0.2); color: var(--success); }
.bs-heatmap-yellow { background: rgba(245,158,11,0.2); color: var(--warning); }
.bs-heatmap-red { background: rgba(239,68,68,0.2); color: #ef4444; }
.bs-heatmap-gray { background: rgba(107,114,128,0.1); color: var(--text-dim); }

/* ===== Editor Area ===== */
.bs-editor-wrap {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 16px;
  height: 100%;
}
.bs-editor {
  display: flex;
  flex-direction: column;
}
.bs-editor-toolbar {
  display: flex;
  gap: 4px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.bs-editor-toolbar button {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 12px;
  color: var(--text-dim);
  cursor: pointer;
  transition: all 0.2s;
}
.bs-editor-toolbar button:hover { color: var(--text); border-color: var(--primary); }
.bs-editor-textarea {
  flex: 1;
  width: 100%;
  min-height: 400px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  color: var(--text);
  font-size: 14px;
  line-height: 1.8;
  font-family: 'Georgia', 'Times New Roman', serif;
  resize: none;
  outline: none;
  box-sizing: border-box;
  transition: border-color 0.2s;
}
.bs-editor-textarea:focus { border-color: var(--primary); }
.bs-editor-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  font-size: 11px;
  color: var(--text-dim);
}

/* ===== AI Suggestions Panel ===== */
.bs-ai-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.bs-ai-panel-header {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
}
.bs-ai-panel-body {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
}
.bs-ai-request-row {
  display: flex;
  gap: 6px;
  padding: 10px 12px;
  border-top: 1px solid var(--border);
}
.bs-ai-request-input {
  flex: 1;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
  color: var(--text);
  font-size: 12px;
  outline: none;
  box-sizing: border-box;
}
.bs-ai-request-input:focus { border-color: var(--primary); }
.bs-ai-send-btn {
  background: var(--primary);
  color: #000;
  border: none;
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
}
.bs-ai-suggestion {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  margin-bottom: 8px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--text);
}
.bs-ai-suggestion-type {
  font-size: 10px;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}
.bs-ai-suggestion-actions {
  display: flex;
  gap: 6px;
  margin-top: 8px;
}
.bs-ai-suggestion-actions button {
  background: var(--surface3);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 3px 10px;
  font-size: 11px;
  color: var(--text-dim);
  cursor: pointer;
}
.bs-ai-suggestion-actions button:hover { color: var(--primary); border-color: var(--primary); }
.bs-ai-suggestion-actions button.accept { color: var(--success); }
.bs-ai-suggestion-actions button.reject { color: #ef4444; }

/* ===== Reference Panel (Characters/World) ===== */
.bs-ref-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.bs-ref-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
}
.bs-ref-card-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}
.bs-ref-card-role {
  font-size: 11px;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 6px;
}
.bs-ref-card-desc {
  font-size: 12px;
  color: var(--text-dim);
  line-height: 1.5;
}
.bs-ref-empty {
  color: var(--text-dim);
  font-size: 13px;
  text-align: center;
  padding: 40px 20px;
}

/* ===== Version History ===== */
.bs-version-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 14px;
}
.bs-version-tag {
  background: var(--primary-dim);
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 8px;
  white-space: nowrap;
}
.bs-version-info { flex: 1; }
.bs-version-stats {
  font-size: 12px;
  color: var(--text);
  margin-bottom: 2px;
}
.bs-version-date {
  font-size: 11px;
  color: var(--text-dim);
}
.bs-version-changelog {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  font-size: 12px;
  color: var(--text-dim);
  line-height: 1.6;
  margin-top: 8px;
  white-space: pre-wrap;
  display: none;
}
.bs-version-changelog.open { display: block; }

/* ===== Word count progress ===== */
.bs-wordcount-bar {
  height: 8px;
  background: var(--surface3);
  border-radius: 4px;
  overflow: hidden;
  margin: 8px 0;
}
.bs-wordcount-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 4px;
  transition: width 0.5s ease;
}
.bs-wordcount-label {
  font-size: 12px;
  color: var(--text-dim);
  display: flex;
  justify-content: space-between;
}

/* ===== Empty/Welcome State ===== */
.bs-welcome {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  text-align: center;
  padding: 40px;
}
.bs-welcome-icon { font-size: 64px; margin-bottom: 16px; }
.bs-welcome-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.bs-welcome-desc {
  font-size: 14px;
  color: var(--text-dim);
  max-width: 400px;
  line-height: 1.6;
}

/* ===== New Project Modal ===== */
.bs-modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.6);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
}
.bs-modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  width: 480px;
  max-width: 95vw;
  max-height: 80vh;
  overflow-y: auto;
}
.bs-modal-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 20px;
}
.bs-form-group {
  margin-bottom: 14px;
}
.bs-form-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-dim);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.bs-form-input {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--text);
  font-size: 13px;
  outline: none;
  box-sizing: border-box;
  font-family: inherit;
}
.bs-form-input:focus { border-color: var(--primary); }
select.bs-form-input { cursor: pointer; }
textarea.bs-form-input { min-height: 80px; resize: vertical; }
.bs-modal-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 20px;
}

/* ===== Loading ===== */
.bs-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px;
  color: var(--text-dim);
  font-size: 13px;
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .bs-container { grid-template-columns: 1fr; height: auto; }
  .bs-sidebar { max-height: 300px; border-right: none; border-bottom: 1px solid var(--border); }
  .bs-editor-wrap { grid-template-columns: 1fr; }
  .bs-ref-grid { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .bs-tabs { overflow-x: auto; }
  .bs-tab { padding: 8px 12px; font-size: 12px; }
  .bs-kpi-row { grid-template-columns: repeat(2, 1fr); }
}