:root {
  --bg: #0f1117;
  --bg-card: #1a1d27;
  --bg-sidebar: #141620;
  --border: #2a2d3a;
  --text: #e4e4e7;
  --text-dim: #8b8d98;
  --primary: #6366f1;
  --primary-hover: #818cf8;
  --success: #22c55e;
  --warning: #eab308;
  --danger: #ef4444;
  --radius: 8px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

#app {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 260px;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.logo h1 {
  font-size: 18px;
  font-weight: 600;
}

.logo .subtitle {
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 4px;
}

.nav-list {
  list-style: none;
  margin-top: 24px;
  flex: 1;
  overflow-y: auto;
}

.nav-list li {
  padding: 10px 12px;
  border-radius: var(--radius);
  cursor: pointer;
  margin-bottom: 4px;
  font-size: 14px;
  transition: background 0.15s;
}

.nav-list li:hover { background: rgba(99, 102, 241, 0.1); }
.nav-list li.active { background: rgba(99, 102, 241, 0.2); color: var(--primary-hover); }

.nav-list .project-meta {
  font-size: 11px;
  color: var(--text-dim);
  margin-top: 2px;
}

/* Content */
.content {
  flex: 1;
  padding: 32px;
  overflow-y: auto;
}

/* Welcome */
.welcome {
  text-align: center;
  padding-top: 60px;
}

.welcome h2 {
  font-size: 28px;
  margin-bottom: 12px;
}

.welcome > p {
  color: var(--text-dim);
  margin-bottom: 48px;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  max-width: 900px;
  margin: 0 auto;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
}

.feature-icon { font-size: 36px; margin-bottom: 12px; }
.feature-card h3 { font-size: 16px; margin-bottom: 8px; }
.feature-card p { font-size: 13px; color: var(--text-dim); line-height: 1.5; }

/* Project detail */
.project-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 24px;
}

.project-header h2 { font-size: 24px; }

.stats-row {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  flex: 1;
}

.stat-value { font-size: 28px; font-weight: 700; }
.stat-label { font-size: 12px; color: var(--text-dim); margin-top: 4px; }

/* Action buttons */
.actions-row {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

/* Table */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.data-table th {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 2px solid var(--border);
  color: var(--text-dim);
  font-weight: 500;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.data-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
}

.data-table tr:hover { background: rgba(255, 255, 255, 0.02); }

.score-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
}

.score-high { background: rgba(34, 197, 94, 0.2); color: var(--success); }
.score-mid { background: rgba(234, 179, 8, 0.2); color: var(--warning); }
.score-low { background: rgba(139, 141, 152, 0.2); color: var(--text-dim); }

.track-tag {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 11px;
  background: rgba(99, 102, 241, 0.15);
  color: var(--primary-hover);
  margin-right: 4px;
}

/* Progress bar */
.progress-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 24px;
}

.progress-bar-outer {
  background: var(--border);
  border-radius: 4px;
  height: 8px;
  margin-top: 12px;
  overflow: hidden;
}

.progress-bar-inner {
  background: var(--primary);
  height: 100%;
  border-radius: 4px;
  transition: width 0.3s ease;
}

.progress-message {
  font-size: 13px;
  color: var(--text-dim);
  margin-top: 8px;
}

/* Buttons */
.btn {
  padding: 8px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  cursor: pointer;
  font-size: 13px;
  transition: all 0.15s;
}

.btn:hover { border-color: var(--text-dim); }

.btn-primary {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

.btn-primary:hover { background: var(--primary-hover); }

.btn-danger { color: var(--danger); border-color: var(--danger); }
.btn-danger:hover { background: rgba(239, 68, 68, 0.1); }

.btn-block { width: 100%; margin-top: 16px; }

.btn-sm { padding: 4px 10px; font-size: 12px; }

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  width: 420px;
  max-width: 90vw;
}

.modal h2 { font-size: 18px; margin-bottom: 20px; }

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 8px 12px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 20px;
}

/* Tabs */
.tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}

.tab {
  padding: 10px 20px;
  font-size: 14px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  color: var(--text-dim);
  transition: all 0.15s;
}

.tab:hover { color: var(--text); }
.tab.active { color: var(--primary-hover); border-bottom-color: var(--primary); }

/* Import area */
.import-area {
  background: var(--bg-card);
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
  margin-bottom: 24px;
  cursor: pointer;
  transition: border-color 0.15s;
}

.import-area:hover { border-color: var(--primary); }
.import-area p { color: var(--text-dim); font-size: 14px; }

/* Empty state */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-dim);
}

.empty-state h3 { font-size: 18px; margin-bottom: 8px; color: var(--text); }

/* Responsive table wrapper */
/* Selected row highlight */
.data-table tr.selected { background: rgba(99, 102, 241, 0.08) !important; }
.data-table tr.selected td:first-child { border-left: 3px solid var(--primary); }

/* Floating selection bar */
.floating-bar {
  position: fixed;
  bottom: 0;
  left: 260px;
  right: 0;
  background: var(--bg-card);
  border-top: 2px solid var(--primary);
  padding: 10px 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 50;
  transform: translateY(100%);
  transition: transform 0.2s ease;
}
.floating-bar.visible { transform: translateY(0); }

.data-table { table-layout: auto; }

@media (max-width: 900px) {
  #app { flex-direction: column; }
  .sidebar { width: 100%; border-right: none; border-bottom: 1px solid var(--border); }
  .content { padding: 20px; }
  .stats-row { flex-wrap: wrap; }
  .stat-card { min-width: 120px; }
  .floating-bar { left: 0; }
}

/* ========== Sidebar Guide Button ========== */

.sidebar-footer {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.btn-guide {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 13px;
  padding: 8px 12px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.15s;
  width: 100%;
}

.btn-guide:hover {
  color: var(--text);
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.08);
}

.guide-icon {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1.5px solid currentColor;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
}

/* ========== Guide Page ========== */

.guide-page {
  max-height: calc(100vh - 64px);
  overflow-y: auto;
  padding-bottom: 60px;
}

.guide-container {
  max-width: 820px;
  margin: 0 auto;
}

.guide-header {
  margin-bottom: 32px;
}

.guide-header h1 {
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 8px;
}

.guide-subtitle {
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.6;
}

/* TOC */
.guide-toc {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 32px;
}

.guide-toc h3 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-dim);
}

.guide-toc ol {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  counter-reset: toc;
}

.guide-toc li {
  counter-increment: toc;
}

.guide-toc a {
  color: var(--primary-hover);
  text-decoration: none;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 0;
  transition: color 0.15s;
}

.guide-toc a::before {
  content: counter(toc) ".";
  color: var(--text-dim);
  font-size: 12px;
  min-width: 16px;
}

.guide-toc a:hover { color: var(--text); }

/* Overview Flow - 30秒看懂全流程 */
.guide-overview-flow {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 20px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.guide-flow-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  min-width: 100px;
  max-width: 130px;
}

.guide-flow-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

.guide-flow-label {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 4px;
}

.guide-flow-desc {
  font-size: 11px;
  color: var(--text-dim);
  line-height: 1.4;
}

.guide-flow-arrow {
  font-size: 20px;
  color: var(--text-dim);
  padding: 6px 6px 0 6px;
  align-self: center;
}

/* Scenario Cards */
.guide-scenario-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 16px;
}

.guide-scenario-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  cursor: pointer;
  transition: all 0.15s;
}

.guide-scenario-card:hover {
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.06);
}

.guide-scenario-q {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}

.guide-scenario-a {
  font-size: 12px;
  color: var(--primary-hover);
  line-height: 1.5;
}

/* Sections */
.guide-section {
  margin-bottom: 40px;
}

.guide-section h2 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--primary);
  display: inline-block;
}

.guide-section p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text);
  margin-bottom: 8px;
}

.guide-section ul, .guide-section ol {
  font-size: 14px;
  line-height: 1.8;
  padding-left: 20px;
  margin-bottom: 12px;
}

.guide-section li {
  margin-bottom: 4px;
}

/* Highlight box */
.guide-highlight {
  background: rgba(99, 102, 241, 0.1);
  border-left: 3px solid var(--primary);
  padding: 12px 16px;
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 14px;
  font-weight: 500;
  margin: 16px 0;
}

/* Table */
.guide-table-wrap {
  overflow-x: auto;
  margin: 12px 0;
}

.guide-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.guide-table th {
  background: var(--bg-card);
  padding: 10px 14px;
  text-align: left;
  font-weight: 600;
  border-bottom: 2px solid var(--border);
  white-space: nowrap;
}

.guide-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  line-height: 1.6;
}

.guide-table tbody tr:hover {
  background: rgba(99, 102, 241, 0.04);
}

.guide-tag {
  display: inline-block;
  font-size: 11px;
  padding: 1px 6px;
  border-radius: 4px;
  background: rgba(99, 102, 241, 0.15);
  color: var(--primary-hover);
  margin-top: 2px;
}

.guide-grade-a { color: var(--success); font-weight: 600; }
.guide-grade-b { color: var(--primary-hover); font-weight: 600; }
.guide-grade-c { color: var(--danger); font-weight: 600; }
.guide-grade-d { color: var(--text-dim); font-weight: 600; }

/* Steps */
.guide-steps {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin: 16px 0;
}

.guide-step {
  display: flex;
  gap: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.guide-step-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
  flex-shrink: 0;
}

.guide-step-body {
  flex: 1;
}

.guide-step-body h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 8px;
}

.guide-step-body p { margin-bottom: 8px; }

.guide-step-body ol, .guide-step-body ul {
  padding-left: 18px;
  margin-bottom: 8px;
}

.guide-tip {
  font-size: 12px;
  color: var(--text-dim);
  background: rgba(234, 179, 8, 0.08);
  border-left: 3px solid var(--warning);
  padding: 8px 12px;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 8px 0;
}

/* Module cards */
.guide-module {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
}

.guide-module h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.guide-module-icon {
  font-size: 18px;
}

.guide-module-desc {
  color: var(--text-dim);
  margin-bottom: 16px !important;
}

.guide-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 16px 0;
}

.guide-grid-3 {
  grid-template-columns: 1fr 1fr 1fr;
}

.guide-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}

.guide-card h5 {
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--primary-hover);
}

.guide-card ul {
  padding-left: 16px;
  font-size: 13px;
  line-height: 1.7;
}

/* Submodule */
.guide-submodule {
  margin: 16px 0;
  padding: 16px;
  background: var(--bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.guide-submodule h4 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--primary-hover);
}

.guide-submodule ul {
  padding-left: 18px;
  font-size: 13px;
  line-height: 1.7;
}

/* Tips box */
.guide-tips-box {
  background: rgba(234, 179, 8, 0.06);
  border: 1px solid rgba(234, 179, 8, 0.2);
  border-radius: var(--radius);
  padding: 16px;
  margin-top: 16px;
}

.guide-tips-box h5 {
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--warning);
}

.guide-tips-box ul {
  padding-left: 18px;
  font-size: 13px;
  line-height: 1.8;
}

/* Workflow cards */
.guide-workflow-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.guide-workflow-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.guide-workflow-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.guide-workflow-header h4 {
  font-size: 15px;
  font-weight: 600;
}

.guide-workflow-badge {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 10px;
  background: rgba(99, 102, 241, 0.15);
  color: var(--primary-hover);
  white-space: nowrap;
}

.guide-workflow-flow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
  margin-bottom: 12px;
}

.guide-workflow-flow span:not(.guide-arrow) {
  font-size: 12px;
  padding: 3px 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
}

.guide-arrow {
  color: var(--text-dim);
  font-size: 12px;
}

.guide-workflow-output {
  font-size: 13px;
  color: var(--text-dim);
  padding-top: 10px;
  border-top: 1px solid var(--border);
}

/* FAQ */
.guide-faq-group {
  margin-bottom: 24px;
}

.guide-faq-group h3 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--primary-hover);
}

.guide-faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 8px;
  overflow: hidden;
}

.guide-faq-q {
  padding: 12px 16px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: background 0.15s;
}

.guide-faq-q:hover {
  background: rgba(99, 102, 241, 0.06);
}

.guide-faq-arrow {
  font-size: 10px;
  color: var(--text-dim);
  transition: transform 0.2s;
  flex-shrink: 0;
}

.guide-faq-item.open .guide-faq-arrow {
  transform: rotate(90deg);
}

.guide-faq-a {
  display: none;
  padding: 0 16px 14px 36px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--text-dim);
}

.guide-faq-item.open .guide-faq-a {
  display: block;
}

.guide-faq-a code {
  background: rgba(99, 102, 241, 0.12);
  padding: 1px 5px;
  border-radius: 3px;
  font-size: 12px;
}

.guide-faq-a ol, .guide-faq-a ul {
  padding-left: 18px;
  margin: 4px 0;
}

/* Responsive for guide */
@media (max-width: 900px) {
  .guide-toc ol { grid-template-columns: 1fr; }
  .guide-grid, .guide-workflow-grid, .guide-scenario-grid { grid-template-columns: 1fr; }
  .guide-grid-3 { grid-template-columns: 1fr; }
  .guide-overview-flow { gap: 8px; padding: 20px 12px; }
  .guide-flow-item { min-width: 80px; }
}