:root {
  --bg-canvas: #f8fafc;
  --bg-surface: #ffffff;
  --bg-subtle: #f1f5f9;
  --bg-hover: #f1f5f9;
  --bg-active: #eff6ff;
  --border-color: #e2e8f0;
  --border-strong: #cbd5e1;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --accent-primary: #2563eb;
  --accent-primary-hover: #1d4ed8;
  --accent-emerald: #059669;
  --accent-emerald-bg: #ecfdf5;
  --accent-emerald-border: #a7f3d0;
  --accent-amber: #d97706;
  --accent-amber-bg: #fffbeb;
  --accent-amber-border: #fde68a;
  --accent-rose: #dc2626;
  --accent-rose-bg: #fef2f2;
  --accent-rose-border: #fecaca;
  --accent-blue-bg: #eff6ff;
  --accent-blue-border: #bfdbfe;
  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 12px -2px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 32px -4px rgba(15, 23, 42, 0.12);
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

[data-theme="dark"] {
  --bg-canvas: #0f172a;
  --bg-surface: #1e293b;
  --bg-subtle: #0f172a;
  --bg-hover: #334155;
  --bg-active: rgba(37, 99, 235, 0.18);
  --border-color: #334155;
  --border-strong: #475569;
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --accent-primary: #3b82f6;
  --accent-primary-hover: #2563eb;
  --accent-emerald: #10b981;
  --accent-emerald-bg: rgba(16, 185, 129, 0.14);
  --accent-emerald-border: rgba(16, 185, 129, 0.35);
  --accent-amber: #f59e0b;
  --accent-amber-bg: rgba(245, 158, 11, 0.14);
  --accent-amber-border: rgba(245, 158, 11, 0.35);
  --accent-rose: #f43f5e;
  --accent-rose-bg: rgba(244, 63, 94, 0.14);
  --accent-rose-border: rgba(244, 63, 94, 0.35);
  --accent-blue-bg: rgba(59, 130, 246, 0.14);
  --accent-blue-border: rgba(59, 130, 246, 0.35);
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.25);
  --shadow-md: 0 4px 12px -2px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 12px 32px -4px rgba(0, 0, 0, 0.5);
}

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

body {
  font-family: var(--font-sans);
  background: var(--bg-canvas);
  color: var(--text-primary);
  min-height: 100vh;
  font-size: 13.5px;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
}

code,
.mono {
  font-family: var(--font-mono);
  font-size: 12px;
}

.tabular {
  font-variant-numeric: tabular-nums;
}

/* App Shell */
.app-shell {
  display: grid;
  grid-template-columns: 248px 1fr;
  min-height: 100vh;
}

.sidebar {
  background: var(--bg-surface);
  border-right: 1px solid var(--border-color);
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.brand-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 10px 16px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 10px;
}

.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 7px;
  background: var(--accent-primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.nav-section-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  padding: 10px 10px 4px;
}

.nav-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  width: 100%;
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid transparent;
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  text-align: left;
  transition: background 0.12s ease, color 0.12s ease;
}

.nav-btn-left {
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
}

.nav-btn svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--text-muted);
}

.nav-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.nav-btn:hover svg {
  color: var(--text-primary);
}

.nav-btn.active {
  background: var(--bg-active);
  color: var(--accent-primary);
  font-weight: 600;
}

.nav-btn.active svg {
  color: var(--accent-primary);
}

.nav-count {
  font-size: 11px;
  font-weight: 600;
  padding: 1px 6px;
  border-radius: 999px;
  background: var(--bg-subtle);
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
}

.nav-count-warn {
  background: var(--accent-amber-bg);
  color: var(--accent-amber);
  border: 1px solid var(--accent-amber-border);
}

/* Main Content Area */
.main-area {
  padding: 20px 28px 96px;
  max-width: 1600px;
  width: 100%;
  min-width: 0;
}

.top-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-color);
}

.page-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.page-subtitle {
  font-size: 12.5px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* KPI Grid */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(195px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

.kpi-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 14px 16px;
  box-shadow: var(--shadow-sm);
}

.kpi-card.clickable {
  cursor: pointer;
  transition: border-color 0.12s ease;
}

.kpi-card.clickable:hover {
  border-color: var(--accent-primary);
}

.kpi-label {
  font-size: 11.5px;
  font-weight: 500;
  color: var(--text-muted);
}

.kpi-value {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 4px;
  font-variant-numeric: tabular-nums;
}

.kpi-meta {
  font-size: 11.5px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Panels & Cards */
.panel-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 16px 18px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.panel-title {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--text-primary);
}

.panel-subtitle {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* Tables */
.table-wrap {
  width: 100%;
  overflow-x: auto;
}

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

.data-table th {
  text-align: left;
  padding: 9px 12px;
  font-size: 11.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-muted);
  background: var(--bg-subtle);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.data-table th.num,
.data-table td.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.data-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border-color);
  vertical-align: middle;
  color: var(--text-primary);
}

.data-table tbody tr:hover td {
  background: var(--bg-hover);
}

.data-table tbody tr.selected-row td {
  background: var(--bg-active);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 7px;
  border-radius: 5px;
  font-size: 11px;
  font-weight: 600;
  white-space: nowrap;
}

.badge-emerald {
  background: var(--accent-emerald-bg);
  color: var(--accent-emerald);
  border: 1px solid var(--accent-emerald-border);
}

.badge-amber {
  background: var(--accent-amber-bg);
  color: var(--accent-amber);
  border: 1px solid var(--accent-amber-border);
}

.badge-blue,
.badge-sky {
  background: var(--accent-blue-bg);
  color: var(--accent-primary);
  border: 1px solid var(--accent-blue-border);
}

.badge-rose {
  background: var(--accent-rose-bg);
  color: var(--accent-rose);
  border: 1px solid var(--accent-rose-border);
}

.badge-neutral {
  background: var(--bg-subtle);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

/* Buttons & Inputs */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 7px 12px;
  border-radius: 6px;
  font-size: 12.5px;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid var(--border-strong);
  background: var(--bg-surface);
  color: var(--text-primary);
  transition: all 0.12s ease;
  white-space: nowrap;
}

.btn:hover:not(:disabled) {
  background: var(--bg-hover);
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn-sm {
  padding: 4px 9px;
  font-size: 12px;
}

.btn-primary {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #ffffff;
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-primary-hover);
  border-color: var(--accent-primary-hover);
}

.btn-emerald {
  background: var(--accent-emerald);
  border-color: var(--accent-emerald);
  color: #ffffff;
}

.btn-emerald:hover:not(:disabled) {
  filter: brightness(0.93);
}

.btn-rose {
  background: var(--accent-rose-bg);
  border-color: var(--accent-rose-border);
  color: var(--accent-rose);
}

.btn-rose:hover:not(:disabled) {
  background: var(--accent-rose);
  color: #ffffff;
}

.input-field,
.select-field {
  background: var(--bg-surface);
  border: 1px solid var(--border-strong);
  color: var(--text-primary);
  padding: 7px 10px;
  border-radius: 6px;
  font-size: 13px;
  font-family: var(--font-sans);
}

.input-field:focus,
.select-field:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.15);
}

/* Grids */
.split-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.catalog-layout {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 16px;
  align-items: start;
}

@media (max-width: 1200px) {
  .split-grid-2,
  .catalog-layout {
    grid-template-columns: 1fr;
  }
}

/* Dropzone */
.dropzone-box {
  border: 1.5px dashed var(--border-strong);
  border-radius: 8px;
  background: var(--bg-subtle);
  padding: 22px;
  text-align: center;
  transition: border-color 0.15s ease, background 0.15s ease;
  cursor: pointer;
}

.dropzone-box.drag-active,
.dropzone-box:hover {
  border-color: var(--accent-primary);
  background: var(--bg-active);
}

/* Stepper */
.step-bar {
  display: flex;
  gap: 10px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.step-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 6px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  font-size: 12.5px;
  color: var(--text-secondary);
}

.step-pill.active {
  border-color: var(--accent-primary);
  background: var(--bg-active);
  color: var(--accent-primary);
  font-weight: 600;
}

.step-num {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--bg-subtle);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
}

.step-pill.active .step-num {
  background: var(--accent-primary);
  color: #ffffff;
}

/* Progress bar */
.progress-track {
  width: 100%;
  height: 6px;
  background: var(--bg-subtle);
  border-radius: 999px;
  overflow: hidden;
  margin-top: 5px;
}

.progress-fill {
  height: 100%;
  background: var(--accent-primary);
  border-radius: 999px;
}

.progress-fill.emerald {
  background: var(--accent-emerald);
}

/* Compact Floating Action Bar (Spec 05 §2) */
.floating-action-bar {
  position: fixed;
  bottom: 16px;
  left: calc(248px + (100vw - 248px) / 2);
  transform: translateX(-50%);
  width: min(880px, calc(100vw - 290px));
  background: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  padding: 8px 12px;
  box-shadow: var(--shadow-lg);
  z-index: 90;
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Slide-Over Copilot Drawer */
.copilot-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: min(460px, 100vw);
  height: 100vh;
  background: var(--bg-surface);
  border-left: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  z-index: 120;
  display: flex;
  flex-direction: column;
}

.copilot-header {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.copilot-messages {
  flex: 1;
  overflow-y: auto;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.chat-bubble {
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 13px;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
}

.chat-bubble.user {
  align-self: flex-end;
  background: var(--accent-primary);
  color: #ffffff;
  max-width: 85%;
}

.chat-bubble.assistant {
  align-self: flex-start;
  background: var(--bg-subtle);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  width: 100%;
}

.copilot-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--border-color);
  background: var(--bg-surface);
}

/* Login Screen */
.login-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: var(--bg-canvas);
}

.login-card {
  width: 100%;
  max-width: 410px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 28px;
  box-shadow: var(--shadow-md);
}

.flash-banner {
  padding: 10px 14px;
  border-radius: 6px;
  margin-bottom: 16px;
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.flash-banner.error {
  background: var(--accent-rose-bg);
  border: 1px solid var(--accent-rose-border);
  color: var(--accent-rose);
}

.flash-banner.success {
  background: var(--accent-emerald-bg);
  border: 1px solid var(--accent-emerald-border);
  color: var(--accent-emerald);
}

.flash-banner.info {
  background: var(--accent-blue-bg);
  border: 1px solid var(--accent-blue-border);
  color: var(--accent-primary);
}