/* ──────────────────────────────────────────────
   Nexus Analytics — Industrial Analytics Platform
   Design: Grid-first, terminal-meets-dashboard,
   deep navy + acid yellow + slate whites
   Font: system-ui stack + monospace for data
──────────────────────────────────────────────── */

:root {
  --bg:         #0D1117;
  --bg-2:       #161B22;
  --bg-3:       #1C2333;
  --bg-4:       #21283B;
  --border:     #2A3347;
  --border-2:   #3A4662;
  --text-primary:   #E6EDF3;
  --text-secondary: #8B949E;
  --text-muted:     #4D5869;
  --accent:     #E8FF47;
  --accent-dim: rgba(232,255,71,0.12);
  --accent-dim2: rgba(232,255,71,0.06);
  --red:        #FF6B6B;
  --green:      #3DDC84;
  --blue:       #58A6FF;
  --orange:     #F78166;
  --purple:     #BC8CFF;
  --sidebar-w:  220px;
  --topbar-h:   52px;
  --radius:     6px;
  --radius-lg:  10px;
  --mono:       'SF Mono', 'Fira Code', 'Consolas', monospace;
  --sans:       -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
}

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

html { font-size: 14px; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text-primary);
  display: flex;
  min-height: 100vh;
  overflow: hidden;
}

/* ── SCROLLBAR ── */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: var(--bg-2); }
::-webkit-scrollbar-thumb { background: var(--border-2); border-radius: 3px; }

/* ── SIDEBAR ── */
.sidebar {
  width: var(--sidebar-w);
  background: var(--bg-2);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  transition: transform 0.22s ease;
  z-index: 100;
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--border);
  height: var(--topbar-h);
}

.logo-text {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--text-primary);
}

.sidebar-nav {
  flex: 1;
  padding: 12px 10px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: var(--radius);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  transition: background 0.12s, color 0.12s;
  cursor: pointer;
}

.nav-item svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.nav-item:hover {
  background: var(--bg-3);
  color: var(--text-primary);
}

.nav-item.active {
  background: var(--accent-dim);
  color: var(--accent);
}

.sidebar-footer {
  padding: 12px 10px;
  border-top: 1px solid var(--border);
}

.user-pill {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: var(--radius);
}

.avatar {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--accent-dim);
  border: 1px solid var(--accent);
  color: var(--accent);
  font-size: 11px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  flex-shrink: 0;
}

.user-info { display: flex; flex-direction: column; }
.user-name { font-size: 12px; font-weight: 600; color: var(--text-primary); }
.user-role { font-size: 11px; color: var(--text-muted); }

/* ── MAIN ── */
.main {
  margin-left: var(--sidebar-w);
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

/* ── TOPBAR ── */
.topbar {
  height: var(--topbar-h);
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  flex-shrink: 0;
  gap: 12px;
}

.topbar-left { display: flex; align-items: center; gap: 14px; }
.topbar-right { display: flex; align-items: center; gap: 10px; }

.sidebar-toggle {
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 4px;
}

.sidebar-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: background 0.12s;
}

.sidebar-toggle:hover span { background: var(--text-primary); }

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

.dataset-pill {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-muted);
  background: var(--bg-3);
  border: 1px solid var(--border);
  padding: 3px 10px;
  border-radius: 20px;
}

.dataset-pill.loaded {
  color: var(--green);
  border-color: rgba(61,220,132,0.3);
  background: rgba(61,220,132,0.08);
}

.upload-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--accent);
  color: #0D1117;
  border-radius: var(--radius);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  letter-spacing: 0.2px;
  transition: background 0.12s, transform 0.1s;
  white-space: nowrap;
}

.upload-btn:hover { background: #d4e83c; transform: translateY(-1px); }

.btn-ghost {
  padding: 6px 14px;
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: border-color 0.12s, color 0.12s;
  white-space: nowrap;
}

.btn-ghost:hover { border-color: var(--border-2); color: var(--text-primary); }

.btn-primary {
  padding: 9px 20px;
  background: var(--accent);
  color: #0D1117;
  border: none;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.12s;
}

.btn-primary:hover { background: #d4e83c; }

/* ── VIEW CONTAINER ── */
.view-container {
  flex: 1;
  overflow: hidden;
  position: relative;
}

.view {
  display: none;
  height: 100%;
  overflow-y: auto;
  padding: 28px 28px 40px;
  animation: fadeIn 0.18s ease;
}

.view.active { display: block; }

@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }

.view-header { margin-bottom: 24px; }

.view-title {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.4px;
  color: var(--text-primary);
  line-height: 1.2;
}

.view-subtitle {
  margin-top: 4px;
  font-size: 13px;
  color: var(--text-secondary);
}

/* ── KPI STRIP ── */
.kpi-strip {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

.kpi-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px 18px;
  transition: border-color 0.15s;
}

.kpi-card:hover { border-color: var(--border-2); }

.kpi-label {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  font-weight: 600;
  margin-bottom: 6px;
}

.kpi-value {
  font-family: var(--mono);
  font-size: 26px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -1px;
  line-height: 1;
}

.kpi-delta {
  font-size: 11px;
  margin-top: 6px;
  font-weight: 500;
}

.kpi-delta.neutral { color: var(--text-muted); }
.kpi-delta.up { color: var(--green); }
.kpi-delta.down { color: var(--red); }
.kpi-delta.warn { color: var(--orange); }

/* ── CHART GRID ── */
.chart-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.chart-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px;
  transition: border-color 0.15s;
}

.chart-card:hover { border-color: var(--border-2); }
.chart-card.wide { grid-column: 1 / -1; }

.chart-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 16px;
  gap: 12px;
}

.chart-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.1px;
}

.chart-meta {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 2px;
  font-family: var(--mono);
}

.chart-wrap {
  position: relative;
  height: 220px;
}

.chart-wrap canvas { width: 100% !important; height: 100% !important; }

/* ── CONTROLS ── */
.ctrl-select {
  background: var(--bg-3);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 5px 10px;
  border-radius: var(--radius);
  font-size: 12px;
  font-family: var(--sans);
  cursor: pointer;
  outline: none;
  transition: border-color 0.12s;
  max-width: 160px;
}

.ctrl-select:hover { border-color: var(--border-2); }

.ctrl-row { display: flex; gap: 8px; flex-wrap: wrap; }

/* ── PROFILE TABLE ── */
.profile-table-wrap {
  overflow-y: auto;
  max-height: 280px;
}

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

.profile-table th {
  position: sticky;
  top: 0;
  background: var(--bg-3);
  color: var(--text-muted);
  text-align: left;
  padding: 6px 10px;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.7px;
  font-weight: 600;
  border-bottom: 1px solid var(--border);
}

.profile-table td {
  padding: 7px 10px;
  border-bottom: 1px solid rgba(42,51,71,0.5);
  color: var(--text-secondary);
  font-family: var(--mono);
}

.profile-table tr:hover td { background: var(--bg-3); color: var(--text-primary); }

.type-badge {
  display: inline-block;
  padding: 1px 7px;
  border-radius: 10px;
  font-size: 10px;
  font-weight: 600;
}

.type-badge.num { background: rgba(88,166,255,0.15); color: var(--blue); }
.type-badge.cat { background: rgba(188,140,255,0.15); color: var(--purple); }
.type-badge.date { background: rgba(61,220,132,0.15); color: var(--green); }

.miss-bar {
  display: inline-block;
  height: 4px;
  background: var(--red);
  border-radius: 2px;
  vertical-align: middle;
  min-width: 2px;
}

/* ── DATA TABLE ── */
.explorer-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.search-input {
  flex: 1;
  background: var(--bg-2);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 8px 14px;
  border-radius: var(--radius);
  font-size: 13px;
  font-family: var(--sans);
  outline: none;
  transition: border-color 0.12s;
}

.search-input:focus { border-color: var(--accent); }
.search-input::placeholder { color: var(--text-muted); }

.row-counter {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
}

.table-wrap {
  overflow: auto;
  max-height: calc(100vh - 200px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-2);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
  min-width: 600px;
}

.data-table thead th {
  position: sticky;
  top: 0;
  background: var(--bg-3);
  color: var(--text-muted);
  padding: 9px 14px;
  text-align: left;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  font-weight: 600;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  white-space: nowrap;
  -webkit-user-select: none;
user-select: none;
}

.data-table thead th:hover { color: var(--text-primary); }

.data-table tbody td {
  padding: 7px 14px;
  border-bottom: 1px solid rgba(42,51,71,0.4);
  color: var(--text-secondary);
  font-family: var(--mono);
  white-space: nowrap;
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
}

.data-table tbody tr:hover td {
  background: var(--bg-3);
  color: var(--text-primary);
}

.data-table tbody tr:nth-child(even) td { background: rgba(22,27,34,0.5); }
.data-table tbody tr:nth-child(even):hover td { background: var(--bg-3); }

.row-num {
  color: var(--text-muted) !important;
  font-size: 10px !important;
  min-width: 40px;
  text-align: right;
}

/* ── ANALYTICS ── */
.analytics-col-picker {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.col-pill {
  padding: 5px 14px;
  border-radius: 20px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 12px;
  font-family: var(--mono);
  cursor: pointer;
  transition: all 0.12s;
}

.col-pill:hover { border-color: var(--border-2); color: var(--text-primary); }
.col-pill.active { background: var(--accent-dim); border-color: var(--accent); color: var(--accent); }

.analytics-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.stat-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px;
}

.stat-card-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 14px;
}

.stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.stat-item { }

.stat-item-label {
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.6px;
}

.stat-item-value {
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 2px;
}

.box-plot-wrap { padding: 20px 10px; }

.box-plot-container {
  position: relative;
  height: 60px;
  display: flex;
  align-items: center;
}

.box-plot-line {
  position: absolute;
  height: 2px;
  background: var(--border-2);
}

.box-plot-rect {
  position: absolute;
  height: 34px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--accent-dim);
  border: 1.5px solid var(--accent);
  border-radius: 3px;
}

.box-plot-median {
  position: absolute;
  width: 2px;
  height: 34px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--accent);
}

.box-plot-whisker {
  position: absolute;
  width: 1.5px;
  height: 20px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--border-2);
}

.box-plot-labels {
  display: flex;
  justify-content: space-between;
  margin-top: 6px;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-muted);
}

.outlier-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: rgba(255,107,107,0.1);
  border: 1px solid rgba(255,107,107,0.3);
  border-radius: 20px;
  color: var(--red);
  font-size: 11px;
  font-family: var(--mono);
  margin-top: 10px;
}

.no-outlier-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: rgba(61,220,132,0.08);
  border: 1px solid rgba(61,220,132,0.25);
  border-radius: 20px;
  color: var(--green);
  font-size: 11px;
  font-family: var(--mono);
  margin-top: 10px;
}

/* ── CORRELATION ── */
.corr-controls {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.ctrl-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: var(--text-secondary);
  cursor: pointer;
}

.ctrl-label input[type="range"] { accent-color: var(--accent); }
.ctrl-label input[type="checkbox"] { accent-color: var(--accent); }

.corr-matrix-wrap {
  overflow: auto;
  max-height: calc(100vh - 240px);
}

.corr-matrix {
  border-collapse: collapse;
  font-size: 11px;
  font-family: var(--mono);
}

.corr-matrix th {
  padding: 6px 10px;
  color: var(--text-muted);
  font-size: 10px;
  font-weight: 600;
  text-align: left;
  white-space: nowrap;
  max-width: 80px;
  overflow: hidden;
  text-overflow: ellipsis;
}

.corr-matrix td {
  padding: 6px 10px;
  text-align: center;
  border: 1px solid var(--border);
  min-width: 60px;
  font-weight: 600;
  transition: filter 0.1s;
  cursor: default;
}

.corr-matrix td:hover { filter: brightness(1.3); }

/* ── REPORTS ── */
.report-section {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  margin-bottom: 16px;
}

.report-section-title {
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.report-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 0;
  border-bottom: 1px solid rgba(42,51,71,0.4);
  font-size: 13px;
}

.report-row:last-child { border-bottom: none; }

.report-row-label { color: var(--text-secondary); }
.report-row-value { font-family: var(--mono); color: var(--text-primary); font-weight: 600; }

.report-insight {
  display: flex;
  gap: 12px;
  padding: 10px 14px;
  background: var(--bg-3);
  border-radius: var(--radius);
  margin-top: 8px;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.insight-icon { font-size: 16px; flex-shrink: 0; margin-top: 1px; }

.report-actions {
  margin-top: 16px;
  display: flex;
  gap: 10px;
}

/* ── EMPTY STATE ── */
.empty-state {
  color: var(--text-muted);
  font-size: 13px;
  font-style: italic;
  padding: 40px 0;
  text-align: center;
}

/* ── TOAST ── */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--bg-3);
  border: 1px solid var(--border-2);
  color: var(--text-primary);
  padding: 10px 20px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  pointer-events: none;
  transition: transform 0.22s ease;
  z-index: 999;
  white-space: nowrap;
}

.toast.show { transform: translateX(-50%) translateY(0); }
.toast.success { border-color: rgba(61,220,132,0.4); color: var(--green); }
.toast.error { border-color: rgba(255,107,107,0.4); color: var(--red); }

/* ── LOADING ── */
.loading-bar {
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
  animation: loadSlide 1s linear infinite;
  border-radius: 2px;
  margin: 20px 0;
}

@keyframes loadSlide {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(400%); }
}

/* ── HIGHLIGHT SEARCH ── */
.highlight { background: rgba(232,255,71,0.2); color: var(--accent); border-radius: 2px; }

/* ── RESPONSIVE ── */
@media (max-width: 1100px) {
  .kpi-strip { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 900px) {
  :root { --sidebar-w: 0px; }
  .sidebar { transform: translateX(-220px); }
  .sidebar.open { transform: translateX(0); width: 220px; }
  .main { margin-left: 0; }
  .chart-grid { grid-template-columns: 1fr; }
  .analytics-grid { grid-template-columns: 1fr; }
  .kpi-strip { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
  .topbar-right .btn-ghost { display: none; }
  .kpi-strip { grid-template-columns: 1fr 1fr; }
}

/* ── SORT INDICATOR ── */
.sort-asc::after { content: ' ▲'; font-size: 9px; }
.sort-desc::after { content: ' ▼'; font-size: 9px; }

/* ── INLINE CODE / KBD ── */
.inline-code {
  font-family: var(--mono);
  font-size: 12px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: 4px;
  color: var(--accent);
}

kbd {
  font-family: var(--mono);
  font-size: 11px;
  background: var(--bg-3);
  border: 1px solid var(--border-2);
  padding: 1px 5px;
  border-radius: 3px;
  color: var(--text-secondary);
}

/* ── SQL CONSOLE ── */
.sql-layout {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.sql-editor-panel {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.sql-editor-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 9px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-3);
  gap: 12px;
}

.sql-db-badge {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-muted);
  background: var(--bg-2);
  border: 1px solid var(--border);
  padding: 3px 10px;
  border-radius: 20px;
  transition: color 0.2s, border-color 0.2s;
}

.sql-editor {
  display: block;
  width: 100%;
  background: #0A0F16;
  color: #E8FF47;
  font-family: var(--mono);
  font-size: 13px;
  border: none;
  outline: none;
  padding: 16px 18px;
  resize: vertical;
  min-height: 130px;
  max-height: 300px;
  line-height: 1.65;
  caret-color: var(--accent);
  tab-size: 2;
}

.sql-editor::placeholder { color: #2E3A4A; }

.sql-chips-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-top: 1px solid var(--border);
  background: var(--bg-2);
  flex-wrap: wrap;
  min-height: 40px;
}

.sql-chip {
  font-family: var(--mono);
  font-size: 10px;
  padding: 3px 10px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: 20px;
  cursor: pointer;
  white-space: nowrap;
  transition: border-color 0.12s, color 0.12s;
  max-width: 360px;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sql-chip:hover { border-color: var(--accent); color: var(--accent); }

.sql-results-panel {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  min-height: 80px;
  overflow: hidden;
}

.sql-result-meta {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-muted);
  padding: 9px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-3);
  letter-spacing: 0.2px;
}

.sql-result-meta.success { color: var(--green); }

.sql-error {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 14px 16px;
  color: var(--red);
  font-family: var(--mono);
  font-size: 12px;
  background: rgba(255,107,107,0.05);
  border: 1px solid rgba(255,107,107,0.18);
  border-radius: var(--radius);
  margin: 12px;
  line-height: 1.55;
}

.sql-err-icon { flex-shrink: 0; font-size: 14px; margin-top: 1px; }

.null-val {
  color: var(--text-muted);
  font-style: italic;
  font-size: 10px;
}

/* ── FORECAST ── */
.forecast-controls {
  margin-bottom: 4px;
}

.forecast-col-row {
  display: flex;
  align-items: flex-end;
  gap: 14px;
  flex-wrap: wrap;
}

.forecast-col-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: var(--text-secondary);
}

.forecast-col-badge {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  padding: 2px 9px;
  border-radius: 4px;
  letter-spacing: 0.3px;
}

.x-badge { background: rgba(88,166,255,0.15); color: #58A6FF; }
.y-badge { background: rgba(61,220,132,0.12);  color: #3DDC84; }

.forecast-arrow-sep {
  font-size: 20px;
  color: var(--text-muted);
  padding-bottom: 1px;
}

.forecast-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 16px;
  margin-top: 18px;
}

.forecast-chart-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px;
}

.forecast-side {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.forecast-eq-card,
.forecast-predict-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px 18px;
}

.reg-equation {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--accent);
  margin: 10px 0 16px;
  line-height: 1.5;
  word-break: break-all;
}

.reg-stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 14px;
}

.reg-stat-label {
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.6px;
}

.reg-stat-val {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 2px;
}

.predict-input-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
}

.predict-label {
  font-size: 11px;
  color: var(--text-secondary);
  white-space: nowrap;
  flex-shrink: 0;
}

.predict-input {
  flex: 1;
  min-width: 0;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 7px 12px;
  color: var(--text-primary);
  font-family: var(--mono);
  font-size: 13px;
  outline: none;
  transition: border-color 0.12s;
}

.predict-input:focus { border-color: var(--accent); }
.predict-input::placeholder { color: var(--text-muted); }

.predict-result-wrap {
  margin-top: 14px;
  text-align: center;
  padding: 14px 10px;
  background: var(--bg-3);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  animation: fadeIn 0.18s ease;
}

.predict-arrow { color: var(--text-muted); font-size: 16px; margin-bottom: 6px; }

.predict-result-label {
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.7px;
  margin-bottom: 6px;
}

.predict-result-value {
  font-family: var(--mono);
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -1px;
}

@media (max-width: 900px) {
  .forecast-layout { grid-template-columns: 1fr; }
  .forecast-col-row { flex-direction: column; align-items: flex-start; gap: 10px; }
  .forecast-arrow-sep { display: none; }
}