/* ============================================
   UAT Agent Converter - Modern UI Styles
   Based on example.html design system
   ============================================ */

/* CSS Variables */
:root {
  --blue-primary: #2563eb;
  --blue-light: #eff6ff;
  --blue-mid: #bfdbfe;
  --green-success: #16a34a;
  --green-light: #f0fdf4;
  --red-danger: #dc2626;
  --red-light: #fef2f2;
  --purple: #7c3aed;
  --purple-light: #f3e8ff;
  --border: #e2e8f0;
  --bg-page: #f1f5f9;
  --bg-panel: #ffffff;
  --text-primary: #0f172a;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-page);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.5;
}

/* App Container */
.app-container {
  width: 1440px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ============================================
   Header
   ============================================ */

.header {
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  padding: 0 var(--spacing-lg);
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.logo-mark {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
}

.header-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.header-title {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.3px;
}

.header-subtitle {
  font-size: 12px;
  color: var(--text-secondary);
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.badge-secure {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 5px 11px;
  background: var(--green-light);
  border: 1px solid #bbf7d0;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
  color: var(--green-success);
}

.badge-secure .dot {
  width: 6px;
  height: 6px;
  background: var(--green-success);
  border-radius: 50%;
  animation: pulse-green 2s infinite;
}

@keyframes pulse-green {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.header-meta {
  font-size: 12px;
  color: var(--text-muted);
}

/* Icon Button */
.icon-btn {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-panel);
  cursor: pointer;
  color: var(--text-muted);
  transition: all 0.15s;
}

.icon-btn:hover {
  background: var(--bg-page);
  color: var(--text-primary);
  border-color: #94a3b8;
}

.lang-text { font-size: 12px; font-weight: 500; }

/* ============================================
   Steps Bar
   ============================================ */

.steps-bar {
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  padding: 0 var(--spacing-lg);
  height: 52px;
  display: flex;
  align-items: center;
}

.step-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding-right: 20px;
}

.step-num {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  border: 2px solid var(--border);
  color: var(--text-muted);
  transition: all 0.3s;
  flex-shrink: 0;
}

.step-item.active .step-num {
  background: var(--blue-primary);
  border-color: var(--blue-primary);
  color: #fff;
}

.step-item.done .step-num {
  background: var(--green-success);
  border-color: var(--green-success);
  color: #fff;
}

.step-label {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  white-space: nowrap;
}

.step-item.active .step-label { color: var(--blue-primary); }
.step-item.done .step-label { color: var(--green-success); }

.step-line {
  flex: 1;
  height: 2px;
  background: var(--border);
  margin: 0 12px;
  border-radius: 2px;
  transition: background 0.3s;
}

.step-line.done { background: var(--green-success); }
.step-line.active { background: var(--blue-mid); }

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

/* ============================================
   Main Content - Three Columns
   ============================================ */

.main-content {
  flex: 1;
  padding: var(--spacing-lg);
  padding-bottom: 80px;  /* 为固定 footer 预留空间 */
  display: flex;
  flex-direction: column;
}

.three-col {
  display: grid;
  grid-template-columns: 1fr 340px 1fr;
  gap: 20px;
  flex: 1;
}

/* ============================================
   Panel
   ============================================ */

.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 1px 4px rgba(0,0,0,0.05);
  transition: box-shadow 0.2s;
  min-height: 480px;
}

.panel:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}

.panel-header {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #fafafa;
  flex-shrink: 0;
}

.panel-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 13px;
  font-weight: 600;
}

.panel-title-icon {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.icon-blue { background: var(--blue-light); color: var(--blue-primary); }
.icon-purple { background: var(--purple-light); color: var(--purple); }
.icon-green { background: var(--green-light); color: var(--green-success); }

.panel-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.panel-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

/* ============================================
   Drop Zone
   ============================================ */

.drop-zone {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-xl);
  cursor: pointer;
  transition: all 0.2s;
  border: 2px dashed transparent;
  margin: var(--spacing-md);
  border-radius: var(--radius-md);
}

.drop-zone:hover {
  background: var(--blue-light);
  border-color: var(--blue-mid);
}

.drop-zone.drag-over {
  border-color: var(--blue-primary);
  background: #dbeafe;
}

.drop-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, #eff6ff, #dbeafe);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue-primary);
}

.drop-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.drop-hint {
  font-size: 12px;
  color: var(--text-muted);
  text-align: center;
}

/* ============================================
   File Viewer (Multi-file display with tree)
   ============================================ */

.file-viewer {
  flex: 1;
  display: flex;
  flex-direction: row;
  overflow: hidden;
}

.file-list-sidebar {
  width: 200px;
  border-right: 1px solid var(--border);
  overflow-y: auto;
  flex-shrink: 0;
  background: #fafafa;
  padding: 4px 0;
}

/* File Tree Styles */
.file-tree-item {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 8px;
  cursor: pointer;
  font-size: 12px;
  color: var(--text-secondary);
  transition: all 0.15s;
  user-select: none;
}

.file-tree-item:hover {
  background: var(--blue-light);
  color: var(--blue-primary);
}

.file-tree-item.active {
  background: var(--blue-light);
  color: var(--blue-primary);
  font-weight: 500;
}

.file-tree-item.selected {
  background: #dbeafe;
}

/* Folder item */
.file-tree-folder {
  font-weight: 500;
}

.file-tree-folder .folder-icon {
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: transform 0.15s;
}

.file-tree-folder.collapsed .folder-icon {
  transform: rotate(-90deg);
}

.file-tree-folder .folder-name {
  flex: 1;
}

/* Folder children */
.file-tree-children {
  display: flex;
  flex-direction: column;
}

.file-tree-folder.collapsed + .file-tree-children {
  display: none;
}

/* File item */
.file-tree-file {
  padding-left: 24px;
}

.file-tree-file .file-icon {
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
}

.file-tree-file .file-name {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
}

/* Match status for template files */
.file-tree-file .match-status {
  width: 16px;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.file-tree-file.matched .match-status {
  color: #22c55e;
}

.file-tree-file.unmatched .match-status {
  color: #9ca3af;
}

.file-tree-file.unmatched:hover {
  color: var(--blue-primary);
}

/* Depth indentation */
.file-tree-children .file-tree-children .file-tree-file {
  padding-left: 40px;
}

.file-tree-children .file-tree-children .file-tree-folder {
  padding-left: 16px;
}

.file-content-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.editor-toolbar {
  padding: 6px 12px;
  background: #fafafa;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11px;
  flex-shrink: 0;
}

.file-name {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 500;
  color: var(--text-primary);
}

.line-count {
  color: var(--text-muted);
}

/* Code Editor */
.code-editor {
  flex: 1;
  width: 100%;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  line-height: 1.7;
  padding: var(--spacing-md);
  border: none;
  outline: none;
  resize: none;
  color: var(--text-primary);
  background: var(--bg-panel);
}

.code-editor::placeholder {
  color: var(--text-muted);
}

/* Code Display */
.code-display {
  flex: 1;
  padding: var(--spacing-md);
  overflow-y: auto;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11.5px;
  line-height: 1.8;
  color: var(--text-primary);
  white-space: pre-wrap;
  word-break: break-all;
}

/* JSON Syntax Highlight */
.json-key { color: #7c3aed; }
.json-string { color: #16a34a; }
.json-number { color: #d97706; }
.json-bool { color: #dc2626; }
.json-null { color: #64748b; }

/* Empty States */
.schema-empty,
.output-empty {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: var(--spacing-lg);
  color: var(--text-muted);
}

.schema-empty div:first-of-type,
.output-empty div:first-of-type {
  font-size: 13px;
  font-weight: 500;
}

/* ============================================
   Output Stats
   ============================================ */

.output-stats {
  padding: 10px var(--spacing-md);
  border-top: 1px solid var(--border);
  display: flex;
  gap: var(--spacing-md);
  background: #fafafa;
  flex-shrink: 0;
}

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

.stat-value {
  font-weight: 600;
  color: var(--text-primary);
  font-family: 'JetBrains Mono', monospace;
}

/* Tags */
.file-count,
.field-count,
.platform-tag {
  font-size: 10px;
  color: var(--text-muted);
  padding: 2px 7px;
  background: var(--bg-page);
  border: 1px solid var(--border);
  border-radius: 4px;
}

/* Platform Selector Tag (clickable) */
.platform-selector-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  background: var(--blue-light);
  border: 1px solid var(--blue-mid);
  border-radius: 6px;
  font-size: 11px;
  cursor: pointer;
  position: relative;
}

.platform-selector-tag .platform-name {
  font-weight: 500;
  color: var(--blue-primary);
}

.platform-selector-tag .platform-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 4px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px;
  font-size: 11px;
  z-index: 100;
  min-width: 120px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  display: none;
}

.platform-selector-tag .platform-dropdown .platform-option {
  padding: 6px 10px;
  cursor: pointer;
  border-radius: 4px;
  transition: background 0.15s;
}

.platform-selector-tag .platform-dropdown .platform-option:hover {
  background: var(--blue-light);
}

.platform-selector-tag .platform-dropdown .platform-option.selected {
  background: var(--blue-mid);
  font-weight: 500;
}

/* Platform selector expanded state */
.platform-selector-tag.expanded .platform-dropdown {
  display: block;
}

/* ============================================
   Footer
   ============================================ */

.footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--bg-panel);
  border-top: 1px solid var(--border);
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  flex-shrink: 0;
}

.footer-section {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.footer-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
}

.platform-selector {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.platform-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 6px 10px;
  border: 1.5px solid var(--border);
  border-radius: 7px;
  background: var(--bg-panel);
  cursor: pointer;
  font-size: 11px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.2s;
  position: relative;
  overflow: hidden;
}

.platform-btn:hover {
  border-color: var(--blue-primary);
  color: var(--blue-primary);
  background: var(--blue-light);
}

.platform-btn.selected {
  border-color: var(--blue-primary);
  background: var(--blue-light);
  color: var(--blue-primary);
}

.plat-emoji { font-size: 14px; }

.footer-divider {
  width: 1px;
  height: 36px;
  background: var(--border);
  flex-shrink: 0;
}

.footer-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-left: auto;
}

/* ============================================
   Buttons
   ============================================ */

.btn {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  outline: none;
  transition: all 0.2s;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--blue-primary);
  color: #fff;
  box-shadow: 0 1px 3px rgba(37,99,235,0.35);
}

.btn-primary:not(:disabled):hover {
  background: #1d4ed8;
  box-shadow: 0 4px 12px rgba(37,99,235,0.4);
  transform: translateY(-1px);
}

.btn-success {
  background: var(--green-success);
  color: #fff;
  box-shadow: 0 1px 3px rgba(22,163,74,0.35);
}

.btn-success:not(:disabled):hover {
  background: #15803d;
  box-shadow: 0 4px 12px rgba(22,163,74,0.4);
  transform: translateY(-1px);
}

.btn-danger {
  background: var(--red-danger);
  color: #fff;
  box-shadow: 0 1px 3px rgba(220,38,38,0.3);
}

.btn-danger:hover {
  background: #b91c1c;
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1.5px solid var(--border);
}

.btn-ghost:not(:disabled):hover {
  background: var(--bg-page);
  border-color: #94a3b8;
  color: var(--text-primary);
  transform: translateY(-1px);
}

/* Ripple Effect */
.ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,0.35);
  transform: scale(0);
  animation: ripple-anim 0.55s linear;
  pointer-events: none;
}

@keyframes ripple-anim {
  to { transform: scale(4); opacity: 0; }
}

/* ============================================
   Loading Overlay
   ============================================ */

.loading-overlay {
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.88);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  z-index: 50;
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--blue-mid);
  border-top-color: var(--blue-primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.loading-text {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
}

.dots span {
  display: inline-block;
  animation: dotBounce 1.2s infinite;
}
.dots span:nth-child(2) { animation-delay: 0.2s; }
.dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes dotBounce {
  0%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-5px); }
}

/* ============================================
   Toast
   ============================================ */

.toast-container {
  position: fixed;
  bottom: 100px;
  right: 40px;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  z-index: 9999;
  pointer-events: none;
}

.toast {
  padding: 11px var(--spacing-md);
  border-radius: 10px;
  font-size: 13px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 9px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
  animation: slideIn 0.3s ease;
  pointer-events: all;
  max-width: 320px;
  background: var(--bg-panel);
  color: var(--text-primary);
}

.toast-success { border-left: 4px solid var(--green-success); }
.toast-error { border-left: 4px solid var(--red-danger); }
.toast-info { border-left: 4px solid var(--blue-primary); }

.toast.hide { animation: slideOut 0.3s ease forwards; }

@keyframes slideIn { from { transform: translateX(60px); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
@keyframes slideOut { from { transform: translateX(0); opacity: 1; } to { transform: translateX(60px); opacity: 0; } }

/* ============================================
   Modal
   ============================================ */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 200;
  backdrop-filter: blur(3px);
}

.modal-overlay.open { display: flex; }

.modal {
  background: var(--bg-panel);
  border-radius: 14px;
  padding: var(--spacing-lg);
  width: 480px;
  box-shadow: 0 24px 60px rgba(0,0,0,0.2);
  animation: modalIn 0.25s ease;
}

.modal-large {
  width: 860px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
}

@keyframes modalIn { from { transform: scale(0.92); opacity: 0; } to { transform: scale(1); opacity: 1; } }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-md);
  flex-shrink: 0;
}

.modal-title {
  font-size: 16px;
  font-weight: 700;
}

.modal-body {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
  overflow-y: auto;
}

.modal-body p {
  margin-bottom: var(--spacing-sm);
}

.modal-body .help-note {
  margin-top: var(--spacing-md);
  padding: var(--spacing-sm);
  background: var(--green-light);
  border-radius: var(--radius-sm);
  color: var(--green-success);
  font-weight: 500;
}

.modal-footer {
  margin-top: var(--spacing-lg);
  display: flex;
  justify-content: flex-end;
  gap: var(--spacing-sm);
  flex-shrink: 0;
}

/* File Selector Modal */
.modal-subtitle {
  font-size: 12px;
  color: var(--text-muted);
  margin-left: var(--spacing-md);
}

.file-selector-list {
  max-height: 300px;
  overflow-y: auto;
}

.file-selector-empty {
  padding: var(--spacing-lg);
  text-align: center;
  color: var(--text-muted);
  font-size: 12px;
}

.file-selector-item {
  padding: 8px 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  border-radius: 6px;
  font-size: 12px;
  transition: background 0.15s;
}

.file-selector-item:hover {
  background: var(--blue-light);
}

.file-selector-item.selected {
  background: var(--blue-mid);
  font-weight: 500;
}

.file-selector-item .file-icon {
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
}

.file-selector-item .file-path {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--text-secondary);
}

.file-selector-item.selected .file-path {
  color: var(--blue-primary);
}

/* ============================================
   Scrollbar
   ============================================ */

::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #94a3b8; }

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 1440px) {
  .app-container { width: 100%; }
}

@media (max-width: 1200px) {
  .three-col {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto;
  }

  #schemaPanel {
    grid-column: 1 / 3;
    grid-row: 2;
    min-height: 200px;
  }
}

@media (max-width: 768px) {
  .header { padding: 0 var(--spacing-md); }
  .steps-bar { padding: 0 var(--spacing-md); display: none; }
  .main-content { padding: var(--spacing-md); padding-bottom: 100px; }  /* 移动端 footer 更高，预留更多空间 */
  .three-col { grid-template-columns: 1fr; gap: var(--spacing-md); }

  .footer {
    flex-direction: column;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
  }

  .footer-section { width: 100%; flex-direction: column; }
  .platform-selector { width: 100%; justify-content: center; }
  .footer-divider { display: none; }
  .footer-actions { width: 100%; justify-content: center; flex-wrap: wrap; }

  .file-list-sidebar { width: 140px; }
}