:root {
  --bg: #0b0f19;
  --surface: #151c2c;
  --surface-hover: #1e293b;
  --surface-card: #182235;
  --text: #f8fafc;
  --text-muted: #94a3b8;
  --border: #233044;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --accent: #8b5cf6;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  display: flex;
  overflow: hidden;
  font-size: 13px;
}

/* App Shell */
.app-shell {
  display: flex;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}

/* Left Sidebar */
.sidebar {
  width: 220px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.sidebar-brand {
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--border);
}

.brand-icon {
  font-size: 1.4rem;
}

.brand-text {
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: var(--text);
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  padding: 12px 8px;
  gap: 4px;
  flex: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 6px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  text-align: left;
  transition: all 0.15s ease;
}

.nav-item:hover {
  background: var(--surface-hover);
  color: var(--text);
}

.nav-item.active {
  background: var(--primary);
  color: #ffffff;
}

.nav-icon {
  font-size: 1.1rem;
}

.sidebar-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
}

.engine-status {
  display: flex;
  align-items: center;
  gap: 8px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
}

.status-dot.online {
  background: var(--success);
  box-shadow: 0 0 8px var(--success);
}

/* Main Wrapper */
.main-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Top Header */
.top-header {
  height: 56px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  flex-shrink: 0;
}

.workspace-switcher {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
}

.global-search-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 12px;
  width: 320px;
}

.global-search-bar input {
  background: transparent;
  border: none;
  color: var(--text);
  font-size: 12px;
  width: 100%;
  outline: none;
}

.kbd-shortcut {
  background: var(--surface-card);
  border: 1px solid var(--border);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 10px;
  color: var(--text-muted);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.header-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.1rem;
  cursor: pointer;
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 8px;
}

.avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 12px;
}

/* Main Content Body */
.main-content {
  flex: 1;
  padding: 20px;
  overflow-y: auto;
}

.view-panel {
  display: none;
  flex-direction: column;
  gap: 16px;
}

.view-panel.active {
  display: flex;
}

.view-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.view-title {
  font-size: 1.3rem;
  font-weight: 800;
}

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

/* Metrics Overview Cards */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.metric-card {
  background: var(--surface-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.metric-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.metric-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

.metric-value {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text);
}

.metric-footer {
  font-size: 11px;
}

.metric-footer.success { color: var(--success); }
.metric-footer.neutral { color: var(--text-muted); }

/* Format Matrix Pills */
.matrix-pills {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.matrix-pill {
  padding: 6px 14px;
  border-radius: 20px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 11px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.matrix-pill:hover {
  border-color: var(--primary);
  color: var(--text);
}

.matrix-pill.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
}

/* Cards & Workspace Grid */
.card {
  background: var(--surface-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.card-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

.convert-workspace-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.workspace-col {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Dropzone */
.dropzone {
  border: 2px dashed var(--primary);
  border-radius: 8px;
  padding: 36px 20px;
  text-align: center;
  background: rgba(59, 130, 246, 0.05);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  transition: all 0.2s ease;
}

.dropzone:hover {
  background: rgba(59, 130, 246, 0.1);
}

/* Source Inspection Panel */
.inspection-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  font-size: 12px;
}

.inspection-item {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 8px 10px;
  border-radius: 6px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.inspection-item .label {
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 700;
}

.inspection-item .val {
  font-weight: 600;
  color: var(--text);
}

/* Forms & Buttons */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
}

.form-control {
  padding: 8px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 13px;
  outline: none;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-size: 12px;
  color: var(--text-muted);
}

.btn {
  padding: 8px 16px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all 0.15s ease;
}

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

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

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

/* Table styling */
.table-container {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}

th, td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  background: rgba(255, 255, 255, 0.02);
  color: var(--text-muted);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 10px;
}

/* Target-Specific Output Preview Box */
.output-preview-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px;
  max-height: 240px;
  overflow-y: auto;
}

.preview-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 11px;
}

.preview-table th, .preview-table td {
  border: 1px solid var(--border);
  padding: 4px 8px;
}

.preview-text {
  white-space: pre-wrap;
  font-family: monospace;
  font-size: 11px;
  color: var(--text-muted);
}