/* AlderIPM-Sim Web — Stylesheet
   Features: Dark mode, WCAG AA accessibility, mobile-first responsive,
   card-based layout, smooth transitions, tooltips, guided tour */

/* ══════════════ CSS Custom Properties (Light Theme) ══════════════ */
:root {
  --bg: #f0f4f0;
  --surface: #ffffff;
  --surface-alt: #f5f9f5;
  --border: #c8d6c8;
  --text: #1a2e1a;
  --text-muted: #4a5f4a;
  --text-contrast: #0d1a0d;
  --primary: #2d6a4f;
  --primary-light: #40916c;
  --primary-dark: #1b4332;
  --accent: #52b788;
  --danger: #dc3545;
  --warning: #e6a817;
  --success: #1a8a3c;
  --info: #0a8abd;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-lg: 0 4px 16px rgba(0,0,0,0.12);
  --shadow-hover: 0 6px 20px rgba(0,0,0,0.15);
  --transition: 0.25s ease;
  --font-base: 1rem;
  --font-sm: 0.875rem;
  --font-xs: 0.8125rem;
  --font-xxs: 0.75rem;
  --header-bg: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
}

/* ══════════════ Dark Theme ══════════════ */
[data-theme="dark"] {
  --bg: #141e14;
  --surface: #1e2d1e;
  --surface-alt: #253525;
  --border: #3a5a3a;
  --text: #d0ddd0;
  --text-muted: #8aa88a;
  --text-contrast: #e8f0e8;
  --primary: #40916c;
  --primary-light: #52b788;
  --primary-dark: #2d6a4f;
  --accent: #74c69d;
  --danger: #e85d6c;
  --warning: #f0c040;
  --success: #52b788;
  --info: #56b4e9;
  --shadow: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-lg: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-hover: 0 6px 20px rgba(0,0,0,0.45);
  --header-bg: linear-gradient(135deg, #0d1f12 0%, #162a1a 50%, #1e3826 100%);
}

/* ══════════════ Reset & Base ══════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: var(--font-base);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background var(--transition), color var(--transition);
}

/* Focus styles for keyboard nav */
:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

/* ══════════════ Header ══════════════ */
header {
  background: var(--header-bg);
  color: #fff;
  padding: 1rem 2rem;
  box-shadow: var(--shadow-lg);
  position: relative;
  z-index: 10;
}

header .header-inner {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  max-width: 1400px;
  margin: 0 auto;
}

header .header-logo { flex-shrink: 0; }
header h1 { font-size: 1.5rem; font-weight: 700; letter-spacing: 0.02em; }
header .subtitle { font-size: var(--font-sm); opacity: 0.85; }

.header-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Dark mode toggle */
.theme-toggle {
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.25);
  color: #fff;
  border-radius: 20px;
  padding: 6px 14px;
  font-size: var(--font-xs);
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.theme-toggle:hover {
  background: rgba(255,255,255,0.25);
  border-color: rgba(255,255,255,0.4);
}

.theme-toggle .theme-icon { font-size: 1.1rem; }

/* ══════════════ Main Tabs ══════════════ */
.main-tabs {
  display: flex;
  background: var(--primary-dark);
  padding: 0 2rem;
  gap: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.main-tabs::-webkit-scrollbar { display: none; }

.main-tab {
  padding: 0.75rem 1.25rem;
  border: none;
  background: transparent;
  color: rgba(255,255,255,0.65);
  font-size: var(--font-sm);
  font-weight: 600;
  cursor: pointer;
  border-bottom: 3px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
  position: relative;
}

.main-tab:hover {
  color: #fff;
  background: rgba(255,255,255,0.08);
}

.main-tab:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

.main-tab.active {
  color: #fff;
  border-bottom-color: var(--accent);
  background: rgba(255,255,255,0.1);
}

[data-theme="dark"] .main-tabs {
  background: #0d1a12;
}

/* ══════════════ Tab Content ══════════════ */
.tab-content {
  display: none;
  padding: 1.5rem 2rem;
  max-width: 1400px;
  margin: 0 auto;
  animation: fadeIn 0.3s ease;
}

.tab-content.active { display: block; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ══════════════ Cards (shared) ══════════════ */
.card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-hover);
}

/* ══════════════ Parameters Tab ══════════════ */
.params-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .params-layout { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1100px) {
  .params-layout { grid-template-columns: repeat(2, 1fr); }
}

.param-group {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: box-shadow var(--transition);
}

.param-group:hover {
  box-shadow: var(--shadow-hover);
}

.param-group-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background: var(--header-bg);
  color: #fff;
}

.param-group-header h3 { font-size: var(--font-sm); font-weight: 600; }

.param-group-body {
  padding: 0.5rem 1rem;
}

/* Individual parameter slider row */
.param-slider-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}

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

.param-slider-row:hover {
  background: var(--surface-alt);
  border-radius: var(--radius-sm);
}

.param-label-line {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--font-xs);
}

.param-symbol {
  font-weight: 700;
  color: var(--primary);
  min-width: 2.5rem;
  font-size: var(--font-sm);
}

.param-name-text {
  color: var(--text-muted);
  font-size: var(--font-xxs);
}

/* Info icon for parameter tooltips */
.param-info-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: help;
  font-size: var(--font-sm);
  padding: 0 4px;
  position: relative;
  transition: color var(--transition);
  line-height: 1;
}

.param-info-btn:hover {
  color: var(--primary);
}

/* Tooltip */
.tooltip-content {
  display: none;
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--text-contrast);
  color: var(--bg);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: var(--font-xxs);
  line-height: 1.4;
  max-width: 280px;
  min-width: 200px;
  z-index: 100;
  box-shadow: var(--shadow-lg);
  pointer-events: none;
  white-space: normal;
  text-align: left;
  font-weight: 400;
}

.tooltip-content::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--text-contrast);
}

.param-info-btn:hover .tooltip-content,
.param-info-btn:focus .tooltip-content {
  display: block;
}

.param-control-line {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.param-control-line input[type="range"] {
  flex: 1;
  accent-color: var(--primary);
  cursor: pointer;
  height: 8px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--border);
  border-radius: 4px;
  outline: none;
}

.param-control-line input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  border: 2px solid var(--surface);
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}

.param-control-line input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  border: 2px solid var(--surface);
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}

.param-val-display {
  min-width: 68px;
  text-align: right;
  font-size: var(--font-xs);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--text);
  background: var(--surface-alt);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.param-unit-badge {
  font-size: var(--font-xxs);
  color: var(--primary);
  background: rgba(45,106,79,0.1);
  padding: 2px 8px;
  border-radius: 10px;
  font-weight: 600;
  white-space: nowrap;
}

[data-theme="dark"] .param-unit-badge {
  background: rgba(82,183,136,0.15);
  color: var(--accent);
}

.btn-reset-param {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: var(--font-xxs);
  color: var(--text-muted);
  padding: 2px 6px;
  transition: all 0.15s;
}

.btn-reset-param:hover {
  background: var(--danger);
  color: #fff;
  border-color: var(--danger);
}

.params-actions {
  margin-top: 1.25rem;
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ══════════════ Buttons ══════════════ */
.btn {
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius);
  font-size: var(--font-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.btn:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.btn-sm { padding: 5px 12px; font-size: var(--font-xxs); }

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 2px 4px rgba(45,106,79,0.3);
}
.btn-primary:hover {
  background: var(--primary-light);
  box-shadow: 0 4px 8px rgba(45,106,79,0.4);
  transform: translateY(-1px);
}

.btn-secondary { background: var(--border); color: var(--text); }
.btn-secondary:hover { background: var(--text-muted); color: #fff; }

.btn-reset-group {
  background: rgba(255,255,255,0.2);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.3);
}
.btn-reset-group:hover { background: rgba(255,255,255,0.35); }

/* ══════════════ Simulation Tab ══════════════ */
.sim-toolbar {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}

.sim-control-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.sim-control-row label {
  font-size: var(--font-xs);
  font-weight: 600;
  white-space: nowrap;
}

.sim-control-row input {
  width: 75px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 8px;
  font-size: var(--font-xs);
  background: var(--surface);
  color: var(--text);
  transition: border-color var(--transition);
}

.sim-control-row input:focus {
  border-color: var(--primary);
}

.sim-btn-row {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* ══════════════ Summary Cards ══════════════ */
.summary-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.summary-card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 0.75rem 1rem;
  text-align: center;
  transition: all var(--transition);
  border-left: 4px solid var(--primary);
}

.summary-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.summary-card .label {
  font-size: var(--font-xxs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  font-weight: 600;
}

.summary-card .value {
  font-size: 1.1rem;
  font-weight: 700;
  margin-top: 4px;
  font-variant-numeric: tabular-nums;
  color: var(--text-contrast);
}

/* Metric tooltips */
.metric-tooltip {
  position: relative;
  cursor: help;
}

.metric-tooltip .metric-tooltip-text {
  display: none;
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--text-contrast);
  color: var(--bg);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  font-size: var(--font-xxs);
  white-space: nowrap;
  z-index: 100;
  box-shadow: var(--shadow-lg);
}

.metric-tooltip:hover .metric-tooltip-text {
  display: block;
}

.status-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 14px;
  font-size: var(--font-xxs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.status-healthy { background: #d4edda; color: #155724; }
.status-beetle_extinct { background: #cce5ff; color: #004085; }
.status-defoliation_warning { background: #fff3cd; color: #856404; }
.status-collapse_risk { background: #f8d7da; color: #721c24; }

[data-theme="dark"] .status-healthy { background: rgba(40,167,69,0.2); color: #52b788; }
[data-theme="dark"] .status-beetle_extinct { background: rgba(0,123,255,0.2); color: #56b4e9; }
[data-theme="dark"] .status-defoliation_warning { background: rgba(255,193,7,0.2); color: #f0c040; }
[data-theme="dark"] .status-collapse_risk { background: rgba(220,53,69,0.2); color: #e85d6c; }

/* ══════════════ Chart Grid ══════════════ */
.chart-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 768px) {
  .chart-grid { grid-template-columns: 1fr 1fr; }
}

.chart-cell {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 0.5rem;
  min-height: 320px;
  transition: box-shadow var(--transition);
}

.chart-cell:hover {
  box-shadow: var(--shadow-hover);
}

/* Plotly uses divs, not canvas */
.chart-cell .plotly-chart {
  width: 100%;
  height: 300px;
}

/* Within-season viewer */
.ws-viewer {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem;
  margin-top: 1.25rem;
}

.ws-viewer h3 {
  font-size: var(--font-sm);
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.ws-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 0.75rem;
}

.ws-controls label {
  font-size: var(--font-xs);
  font-weight: 600;
}

.ws-controls input,
.ws-controls select {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 8px;
  font-size: var(--font-xs);
  background: var(--surface);
  color: var(--text);
}

/* ══════════════ Equilibrium Tab ══════════════ */
.eq-toolbar {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.eq-hint {
  font-size: var(--font-xs);
  color: var(--text-muted);
}

.eq-table {
  width: 100%;
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border-collapse: separate;
  border-spacing: 0;
  overflow: hidden;
  font-size: var(--font-xs);
}

.eq-table thead {
  background: var(--header-bg);
  color: #fff;
}

.eq-table th {
  padding: 0.75rem 1rem;
  font-size: var(--font-xs);
  font-weight: 600;
  text-align: left;
}

.eq-table td {
  padding: 0.7rem 1rem;
  font-size: var(--font-xs);
  border-bottom: 1px solid var(--border);
  font-variant-numeric: tabular-nums;
}

.eq-table tbody tr:last-child td { border-bottom: none; }
.eq-table tbody tr:nth-child(even) { background: var(--surface-alt); }
.eq-table tbody tr:hover { background: rgba(82,183,136,0.08); }

.eq-stable { color: var(--success); font-weight: 600; }
.eq-unstable { color: var(--danger); font-weight: 600; }

/* Phase portraits section */
.phase-portraits {
  margin-top: 1.5rem;
}

.phase-portraits h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 0.75rem;
}

.phase-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 768px) {
  .phase-grid { grid-template-columns: 1fr 1fr; }
}

/* ══════════════ Early Warnings Tab ══════════════ */
.ew-toolbar {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}

.ew-toolbar-section {
  margin-bottom: 1rem;
}

.ew-toolbar-section:last-child { margin-bottom: 0; }

.ew-toolbar-section h3 {
  font-size: var(--font-sm);
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.ew-source-row, .ew-settings-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  font-size: var(--font-sm);
}

.ew-source-row label { cursor: pointer; }
.ew-hint { font-size: var(--font-xs); color: var(--text-muted); }

.ew-settings-row label { font-weight: 600; white-space: nowrap; }
.ew-settings-row select, .ew-settings-row input[type="number"] {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 8px;
  font-size: var(--font-xs);
  background: var(--surface);
  color: var(--text);
}

.ew-btn-row {
  margin-top: 0.75rem;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* Traffic-light alert */
.ew-alert-box {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 1.25rem;
  transition: all var(--transition);
}

.ew-alert-box.alert-green {
  background: rgba(26,138,60,0.1);
  border-left: 5px solid var(--success);
}
.ew-alert-box.alert-amber {
  background: rgba(230,168,23,0.1);
  border-left: 5px solid var(--warning);
}
.ew-alert-box.alert-red {
  background: rgba(220,53,69,0.1);
  border-left: 5px solid var(--danger);
}

.ew-traffic-light {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: 0 0 8px rgba(0,0,0,0.15);
}

.alert-green .ew-traffic-light { background: var(--success); box-shadow: 0 0 12px rgba(26,138,60,0.4); }
.alert-amber .ew-traffic-light { background: var(--warning); box-shadow: 0 0 12px rgba(230,168,23,0.4); }
.alert-red .ew-traffic-light { background: var(--danger); box-shadow: 0 0 12px rgba(220,53,69,0.4); }

.ew-alert-text {
  font-size: var(--font-sm);
  line-height: 1.5;
}

.ew-chart-grid {
  grid-template-columns: 1fr;
}

@media (min-width: 1000px) {
  .ew-chart-grid { grid-template-columns: 1fr 1fr 1fr; }
}

/* ══════════════ Control Comparison Tab ══════════════ */
.ctrl-toolbar {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}

.ctrl-toolbar-section {
  margin-bottom: 1rem;
}

.ctrl-toolbar-section:last-child { margin-bottom: 0; }

.ctrl-toolbar-section h3 {
  font-size: var(--font-sm);
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.ctrl-settings-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  font-size: var(--font-sm);
}

.ctrl-settings-row label { font-weight: 600; white-space: nowrap; }
.ctrl-settings-row input {
  width: 75px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 8px;
  font-size: var(--font-xs);
  background: var(--surface);
  color: var(--text);
}

.ctrl-weights-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.5rem 1.5rem;
}

@media (min-width: 640px) {
  .ctrl-weights-grid { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
}

.ctrl-weight-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--font-xs);
}

.ctrl-weight-item label {
  min-width: 170px;
  font-weight: 600;
  white-space: nowrap;
}

.ctrl-weight-item input[type="range"] {
  flex: 1;
  accent-color: var(--primary);
  cursor: pointer;
  height: 8px;
}

.ctrl-weight-item span {
  min-width: 35px;
  text-align: right;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  font-size: var(--font-xs);
  background: var(--surface-alt);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

.ctrl-btn-row {
  margin-top: 0.75rem;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.ctrl-chart-container { margin-top: 1.25rem; }

/* Best-strategy highlight */
.ctrl-best-row { background: rgba(82,183,136,0.15) !important; }

/* Pareto chart section */
.pareto-section {
  margin-top: 1.25rem;
}

.pareto-section h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 0.75rem;
}

/* ══════════════ About / Help Tab ══════════════ */
.about-container {
  max-width: 900px;
}

.about-section {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
  margin-bottom: 1.25rem;
  transition: box-shadow var(--transition);
}

.about-section:hover {
  box-shadow: var(--shadow-hover);
}

.about-section h2 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.75rem;
  border-bottom: 2px solid var(--accent);
  padding-bottom: 0.4rem;
}

.about-section p, .about-section li {
  font-size: var(--font-sm);
  line-height: 1.7;
  color: var(--text);
}

.about-section ul, .about-section ol {
  padding-left: 1.5rem;
  margin: 0.5rem 0;
}

.about-section li { margin-bottom: 0.5rem; }

.eq-block {
  background: var(--surface-alt);
  border-radius: var(--radius-sm);
  padding: 1rem;
  border: 1px solid var(--border);
}

.eq-block h4 {
  font-size: var(--font-xs);
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 0.3rem;
  margin-top: 0.75rem;
}

.eq-block h4:first-child { margin-top: 0; }

.eq-block pre {
  font-family: "Consolas", "Monaco", "Courier New", monospace;
  font-size: var(--font-xs);
  line-height: 1.6;
  overflow-x: auto;
  margin: 0;
  white-space: pre-wrap;
  color: var(--text);
}

.glossary-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.4rem 1.5rem;
}

@media (min-width: 640px) {
  .glossary-grid { grid-template-columns: repeat(auto-fill, minmax(380px, 1fr)); }
}

.glossary-item {
  display: flex;
  gap: 0.5rem;
  font-size: var(--font-xs);
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--border);
}

.glossary-symbol {
  font-weight: 700;
  color: var(--primary);
  min-width: 55px;
  flex-shrink: 0;
}

.glossary-desc {
  color: var(--text-muted);
}

/* ══════════════ Guided Tour Overlay ══════════════ */
.tour-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.6);
  z-index: 9999;
  display: none;
  align-items: center;
  justify-content: center;
}

.tour-overlay.active { display: flex; }

.tour-card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 2rem;
  max-width: 480px;
  width: 90%;
  position: relative;
  animation: tourSlideIn 0.3s ease;
}

@keyframes tourSlideIn {
  from { opacity: 0; transform: scale(0.95) translateY(10px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.tour-card h2 {
  font-size: 1.25rem;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.tour-card p {
  font-size: var(--font-sm);
  color: var(--text);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.tour-step-indicator {
  font-size: var(--font-xxs);
  color: var(--text-muted);
  text-align: center;
  margin-bottom: 0.75rem;
}

.tour-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
}

.tour-skip {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: var(--font-xs);
  padding: 6px 12px;
}

.tour-skip:hover { color: var(--text); text-decoration: underline; }

/* ══════════════ Share Config ══════════════ */
.share-config-btn {
  background: var(--accent);
  color: var(--primary-dark);
  border: none;
  border-radius: var(--radius);
  padding: 8px 16px;
  font-size: var(--font-xs);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}

.share-config-btn:hover {
  background: var(--primary-light);
  color: #fff;
}

.share-toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-dark);
  color: #fff;
  padding: 10px 24px;
  border-radius: var(--radius);
  font-size: var(--font-sm);
  box-shadow: var(--shadow-lg);
  z-index: 10000;
  animation: toastIn 0.3s ease, toastOut 0.3s ease 2.5s;
  opacity: 0;
  animation-fill-mode: forwards;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateX(-50%) translateY(20px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

@keyframes toastOut {
  from { opacity: 1; }
  to { opacity: 0; }
}

/* ══════════════ Section dividers ══════════════ */
.section-divider {
  border: none;
  height: 1px;
  background: var(--border);
  margin: 2rem 0;
}

/* ══════════════ Progress bar ══════════════ */
progress {
  -webkit-appearance: none;
  appearance: none;
  height: 8px;
  border-radius: 4px;
  overflow: hidden;
}

progress::-webkit-progress-bar {
  background: var(--border);
  border-radius: 4px;
}

progress::-webkit-progress-value {
  background: var(--primary);
  border-radius: 4px;
  transition: width 0.2s;
}

progress::-moz-progress-bar {
  background: var(--primary);
  border-radius: 4px;
}

/* ══════════════ Responsive (Mobile-first) ══════════════ */
@media (max-width: 767px) {
  header { padding: 0.75rem 1rem; }
  header h1 { font-size: 1.2rem; }
  header .subtitle { font-size: var(--font-xxs); }
  .main-tabs { padding: 0 0.5rem; }
  .main-tab { padding: 0.6rem 0.8rem; font-size: var(--font-xs); }
  .tab-content { padding: 1rem; }
  .chart-cell { min-height: 260px; }
  .sim-control-row { gap: 0.4rem; }
  .eq-toolbar { flex-direction: column; align-items: flex-start; }
  .summary-bar { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .header-actions { display: none; }
  .main-tab { padding: 0.5rem 0.6rem; font-size: var(--font-xxs); }
  .summary-bar { grid-template-columns: 1fr; }
}

/* ══════════════ Print ══════════════ */
@media print {
  header, .main-tabs, .tour-overlay, .theme-toggle,
  .btn, .sim-toolbar, .ew-toolbar, .ctrl-toolbar,
  .params-actions { display: none !important; }
  .tab-content { display: block !important; padding: 0; }
  .chart-cell { break-inside: avoid; }
  body { background: #fff; color: #000; }
}

/* ══════════════ Cross-language buttons ══════════════ */
.btn-uselang {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 13px;
  margin-right: 6px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: background .15s, transform .1s;
}
.btn-uselang:hover { background: #e9ecef; }
.btn-uselang .lang-tag {
  display: inline-block;
  min-width: 22px;
  text-align: center;
  padding: 1px 4px;
  border-radius: 3px;
  font-weight: 700;
  font-size: 11px;
}
.btn-use-r .lang-tag   { background: #276dc3; color: #fff; }
.btn-use-py .lang-tag  { background: #3776ab; color: #fff; }
[data-theme="dark"] .btn-uselang:hover { background: #30363d; }

/* ══════════════ Cross-language modal ══════════════ */
.cl-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.55);
  display: flex; align-items: center; justify-content: center;
  z-index: 9000; padding: 1rem;
}
.cl-modal {
  background: var(--surface); color: var(--text);
  border-radius: 10px; max-width: 820px; width: 100%;
  max-height: 90vh; display: flex; flex-direction: column;
  box-shadow: 0 20px 60px rgba(0,0,0,0.35);
  border: 1px solid var(--border);
}
.cl-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 18px; border-bottom: 1px solid var(--border);
}
.cl-header h2 { margin: 0; font-size: 18px; }
.cl-close {
  background: transparent; border: 0; font-size: 26px;
  cursor: pointer; line-height: 1; color: var(--text);
}
.cl-body { padding: 14px 18px; overflow: auto; }
.cl-lede { margin-top: 0; font-size: 14px; }
.cl-tabs {
  display: flex; gap: 4px; border-bottom: 1px solid var(--border);
  margin-bottom: 12px; flex-wrap: wrap;
}
.cl-tab {
  background: transparent; border: 0; padding: 8px 12px;
  cursor: pointer; border-bottom: 2px solid transparent;
  font-size: 13px; color: var(--text);
}
.cl-tab.active {
  border-bottom-color: #40916c; font-weight: 600; color: #40916c;
}
.cl-panel h3 { margin-top: 0; font-size: 15px; }
.cl-code-wrap {
  position: relative; margin: 10px 0;
}
.cl-code-wrap pre {
  background: #0d1117; color: #c9d1d9;
  padding: 12px; border-radius: 6px;
  font-size: 12.5px; overflow: auto;
  border: 1px solid #30363d;
}
.cl-copy {
  position: absolute; top: 8px; right: 8px;
  background: #40916c; color: #fff; border: 0;
  padding: 4px 10px; border-radius: 4px; cursor: pointer;
  font-size: 11px;
}
.cl-copy:hover { background: #2d6a4f; }
.cl-hint { font-size: 12px; color: var(--text-muted, #777); }

/* ══════════════ Fitting tab ══════════════ */
.fit-param-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 4px 12px;
  max-height: 180px; overflow: auto;
  padding: 6px;
  border: 1px solid var(--border); border-radius: 6px;
  background: var(--surface);
}
.fit-param-grid label {
  display: flex; align-items: center; gap: 6px; font-size: 13px;
  padding: 2px 4px; cursor: pointer;
}
.fit-regime-box {
  border-left: 4px solid #40916c; background: var(--surface);
  padding: 12px 16px; border-radius: 6px; font-size: 14px;
}
.fit-regime-box .regime-label {
  font-weight: 700; font-size: 16px; display: block; margin-bottom: 4px;
}
.fit-regime-box .regime-rp { font-size: 13px; margin-top: 6px; color: var(--text-muted, #555); }

/* ══════════════ Plain-language parameter labels ══════════════ */
.param-label-line {
  flex-wrap: wrap; /* let long labels wrap gracefully */
  row-gap: 4px;
}
.param-plain-label {
  display: inline-block;
  background: rgba(64, 145, 108, 0.10);
  color: #2d6a4f;
  border: 1px solid rgba(64, 145, 108, 0.25);
  border-radius: 10px;
  padding: 1px 9px;
  font-size: 12px;
  font-weight: 500;
  line-height: 1.45;
  margin-left: 2px;
  letter-spacing: 0.1px;
  cursor: help;
  white-space: nowrap;
}
[data-theme="dark"] .param-plain-label {
  background: rgba(82, 183, 136, 0.15);
  color: #95d5b2;
  border-color: rgba(82, 183, 136, 0.35);
}
@media (max-width: 520px) {
  .param-plain-label { white-space: normal; }
}

/* Glossary enhancements */
.glossary-plain {
  color: #2d6a4f;
  font-weight: 600;
}
[data-theme="dark"] .glossary-plain { color: #95d5b2; }
.glossary-range {
  font-size: 11px;
  color: var(--text-muted, #777);
  font-variant-numeric: tabular-nums;
}
.glossary-hint {
  color: var(--text-muted, #666);
  font-size: 12.5px;
  display: inline-block;
  margin-top: 2px;
}

/* Richer info-button tooltip so the full description reads well on hover */
.param-info-btn .tooltip-content {
  max-width: 340px;
  text-align: left;
  line-height: 1.45;
  white-space: normal;
}

/* ══════════════ Audience-mode toggle ══════════════ */
.btn-audience {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 13px;
  margin-right: 6px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.btn-audience:hover { background: #e9ecef; }
[data-theme="dark"] .btn-audience:hover { background: #30363d; }
.mode-dot {
  width: 9px; height: 9px;
  border-radius: 50%;
  background: #40916c;
}
.mode-dot-simple { background: #52b788; }
.mode-dot-full   { background: #1d3557; }

/* ══════════════ Scenario cards on Parameters tab ══════════════ */
.scenario-cards-wrap {
  margin: 0 0 22px 0;
  padding: 16px 16px 18px 16px;
  background: linear-gradient(135deg, rgba(82,183,136,0.08), rgba(244,162,97,0.05));
  border: 1px solid var(--border);
  border-radius: 10px;
}
[data-theme="dark"] .scenario-cards-wrap {
  background: linear-gradient(135deg, rgba(82,183,136,0.12), rgba(244,162,97,0.08));
}
.scenario-cards-header h2 {
  margin: 0 0 4px 0;
  font-size: 18px;
}
.scenario-cards-header p {
  margin: 0 0 12px 0;
  font-size: 13.5px;
  color: var(--text-muted, #555);
}
.scenario-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
}
.scenario-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 14px 12px 14px;
  cursor: pointer;
  text-align: left;
  color: var(--text);
  transition: transform .12s ease, box-shadow .12s ease, border-color .12s ease;
  min-height: 150px;
  font-family: inherit;
}
.scenario-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0,0,0,0.08);
  border-color: #40916c;
}
.scenario-card:focus-visible {
  outline: 2px solid #40916c;
  outline-offset: 2px;
}
.scenario-card-icon {
  display: inline-flex;
  padding: 6px;
  border-radius: 10px;
  margin-bottom: 10px;
}
.scenario-card-title {
  font-weight: 700;
  font-size: 15px;
  line-height: 1.3;
  margin-bottom: 4px;
}
.scenario-card-tagline {
  font-size: 12.5px;
  line-height: 1.45;
  color: var(--text-muted, #666);
  margin-bottom: 10px;
  flex: 1;
}
.scenario-card-go {
  font-size: 12.5px;
  font-weight: 600;
  margin-top: auto;
}

/* Hide scenario cards in Full mode so advanced users aren't nagged. */
[data-audience="full"] .scenario-cards-wrap { display: none; }

/* ══════════════ Interpretation banner (Simulation, Control) ══════════════ */
.interpret-banner {
  border-left: 5px solid #40916c;
  background: var(--surface);
  border-radius: 8px;
  padding: 14px 18px;
  margin: 14px 0 10px 0;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.interpret-row {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.interpret-dot {
  width: 14px; height: 14px;
  border-radius: 50%;
  flex: 0 0 14px;
  margin-top: 4px;
}
.interpret-headline {
  font-weight: 700;
  font-size: 15.5px;
  margin-bottom: 4px;
}
.interpret-body {
  font-size: 13.5px;
  line-height: 1.5;
  margin-bottom: 6px;
}
.interpret-rp {
  font-size: 13px;
  margin-bottom: 6px;
  color: var(--text-muted, #444);
}
.interpret-advice {
  font-size: 13px;
  color: var(--text-muted, #555);
  background: rgba(64,145,108,0.07);
  padding: 6px 10px;
  border-radius: 6px;
  margin-top: 4px;
}

/* In Simple mode, nudge the default parameter-group layout to be less dense */
[data-audience="simple"] .params-layout {
  gap: 18px;
}

/* ══════════════ Location tab ══════════════ */
.loc-intro { max-width: 900px; margin-bottom: 14px; }
.loc-intro h2 { margin: 0 0 6px 0; }
.loc-intro p { margin: 0; font-size: 13.5px; color: var(--text-muted, #555); line-height: 1.5; }

#loc-map {
  height: 520px;
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  margin: 10px 0;
  background: #e8eef2;
}
[data-theme="dark"] #loc-map { background: #1b2430; }

.loc-legend {
  display: flex;
  gap: 16px;
  font-size: 13px;
  color: var(--text-muted, #555);
  margin: 6px 0 14px 2px;
  align-items: center;
}
.loc-swatch {
  display: inline-block;
  width: 14px; height: 14px;
  border-radius: 50%;
  margin-right: 6px;
  vertical-align: middle;
  border: 2px solid #fff;
  box-shadow: 0 0 0 1px rgba(0,0,0,0.15);
}

.loc-site-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px;
  background: var(--surface);
  margin-top: 10px;
  box-shadow: 0 4px 14px rgba(0,0,0,0.05);
  animation: locFadeIn .25s ease;
}
.loc-site-card.loc-deemphasised { opacity: 0.55; }
@keyframes locFadeIn { from { opacity:0; transform: translateY(4px); } to { opacity:1; transform:none; } }

.loc-card-head {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  align-items: flex-start;
  margin-bottom: 10px;
}
.loc-card-head h3 { margin: 0 0 2px 0; font-size: 18px; }
.loc-sub { font-size: 13px; color: var(--text-muted, #666); }
.loc-climate { display: flex; gap: 10px; flex-wrap: wrap; }
.loc-climate-item {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  padding: 6px 12px;
  border-radius: 8px;
  background: rgba(64,145,108,0.08);
  min-width: 76px;
}
[data-theme="dark"] .loc-climate-item { background: rgba(82,183,136,0.14); }
.loc-num { font-weight: 700; font-size: 15px; color: var(--text); }
.loc-lbl { font-size: 11px; color: var(--text-muted, #666); }

.loc-advice { font-size: 13px; color: var(--text-muted, #555); margin: 6px 0 12px 0; line-height: 1.5; }

.loc-actions { display: flex; gap: 10px; flex-wrap: wrap; }

/* Leaflet overrides so the control looks at home with our palette. */
.leaflet-container { font-family: inherit; }
.leaflet-tooltip { font-size: 12px; }

/* ══════════════ CI band + citation chip on sliders ══════════════ */
.param-control-line { position: relative; }
.param-ci-track {
  position: absolute;
  left: 0;
  right: auto;
  top: 50%;
  transform: translateY(-50%);
  width: 100%;
  height: 18px;
  pointer-events: none;
  z-index: 0;
}
/* Shrink width to match the slider only. Sliders are flex children; the track uses
   the slider's bounding width via an offset trick: we apply margin to align to the
   slider's track visual area. */
.param-slider-row input[type="range"] { position: relative; z-index: 1; }
.param-ci-fill {
  position: absolute;
  top: 50%;
  height: 6px;
  transform: translateY(-50%);
  background: rgba(64,145,108,0.22);
  border-radius: 3px;
  border: 1px dashed rgba(64,145,108,0.45);
}
[data-theme="dark"] .param-ci-fill {
  background: rgba(82,183,136,0.25);
  border-color: rgba(82,183,136,0.55);
}
.param-ci-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 500;
  padding: 1px 8px;
  border-radius: 10px;
  background: rgba(38,70,83,0.08);
  color: #264653;
  border: 1px solid rgba(38,70,83,0.2);
  margin-left: 4px;
  cursor: pointer;
  white-space: nowrap;
}
[data-theme="dark"] .param-ci-chip {
  background: rgba(148,210,189,0.15);
  color: #8ecae6;
  border-color: rgba(148,210,189,0.35);
}
.param-ci-chip:hover { background: rgba(38,70,83,0.16); }
.param-ci-n { color: var(--text-muted, #666); font-weight: 600; }

/* ══════════════ Sources modal (shared) ══════════════ */
.loc-sources-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.55);
  display: flex; align-items: center; justify-content: center;
  z-index: 9100; padding: 1rem;
}
.loc-sources-modal {
  background: var(--surface); color: var(--text);
  border-radius: 10px; max-width: 640px; width: 100%;
  max-height: 88vh; display: flex; flex-direction: column;
  box-shadow: 0 20px 60px rgba(0,0,0,0.35);
  border: 1px solid var(--border);
  animation: locFadeIn .18s ease;
}
.loc-sources-head {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 18px; border-bottom: 1px solid var(--border);
}
.loc-sources-head h3 { margin: 0; font-size: 16px; }
.loc-sources-close {
  background: transparent; border: 0; font-size: 26px;
  cursor: pointer; line-height: 1; color: var(--text);
}
.loc-sources-body { padding: 14px 18px; overflow: auto; font-size: 13.5px; line-height: 1.55; }
.loc-sources-body p { margin: 0 0 8px 0; }
.loc-sources-list { padding-left: 22px; margin: 4px 0 0 0; }
.loc-sources-list li { margin-bottom: 8px; }
.loc-hint { font-size: 12.5px; color: var(--text-muted, #666); border-top: 1px dashed var(--border); padding-top: 10px; margin-top: 10px; }

/* ══════════════ Metadatabase badge ══════════════ */
.meta-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 18px;
  cursor: pointer;
  font-size: 12px;
  margin-right: 8px;
  line-height: 1.15;
}
.meta-badge:hover { background: #e9ecef; }
[data-theme="dark"] .meta-badge:hover { background: #30363d; }
.meta-dot {
  width: 9px; height: 9px;
  border-radius: 50%;
  background: #40916c;
  box-shadow: 0 0 0 3px rgba(64,145,108,0.25);
  animation: metaPulse 2s infinite;
}
@keyframes metaPulse {
  0% { box-shadow: 0 0 0 0 rgba(64,145,108,0.45); }
  100% { box-shadow: 0 0 0 6px rgba(64,145,108,0); }
}
.meta-badge-text { display: inline-flex; flex-direction: column; }
.meta-badge-line1 { font-weight: 600; }
.meta-badge-line2 { font-size: 10.5px; color: var(--text-muted, #666); }

/* ══════════════ Scenario card photos ══════════════ */
.scenario-card-photo {
  display: block;
  width: 100%;
  height: 110px;
  overflow: hidden;
  border-radius: 8px;
  margin-bottom: 10px;
  background: #e8eef2;
  position: relative;
}
.scenario-card-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .45s ease;
  display: block;
}
.scenario-card:hover .scenario-card-photo img { transform: scale(1.05); }
.scenario-card-fallback {
  position: absolute; inset: 0;
  align-items: center; justify-content: center;
}

/* ══════════════ Parameter-group header photo chips ══════════════ */
.group-photo-chip {
  display: inline-block;
  width: 36px; height: 36px;
  border-radius: 8px;
  overflow: hidden;
  margin-right: 10px;
  background: #dfe6eb;
  flex: 0 0 36px;
  vertical-align: middle;
  border: 1px solid var(--border);
}
.group-photo-chip img {
  width: 100%; height: 100%; object-fit: cover;
  display: block;
  transition: transform .4s ease;
}
.param-group-header { display: flex; align-items: center; gap: 6px; }
.param-group-header h3 { margin: 0; flex: 1; }

/* ══════════════ Photo credits list in About ══════════════ */
.photo-credits-list {
  list-style: none;
  padding-left: 0;
  margin-top: 6px;
}
.photo-credits-list li {
  padding: 10px 12px;
  border-left: 3px solid #40916c;
  background: rgba(64,145,108,0.06);
  border-radius: 0 6px 6px 0;
  margin-bottom: 8px;
  font-size: 13px;
  line-height: 1.55;
}
.photo-credits-usage { color: var(--text-muted, #666); font-size: 12px; font-style: italic; }

/* ══════════════ Polish pass ══════════════ */
/* Smoother tab transition */
.tab-content {
  transition: opacity .25s ease;
}
.tab-content:not(.active) { opacity: 0; pointer-events: none; }
.tab-content.active      { opacity: 1; }

/* Loading skeleton utility */
.is-loading {
  position: relative;
  color: transparent !important;
  background: linear-gradient(90deg, #eceff2 25%, #dfe6eb 50%, #eceff2 75%);
  background-size: 200% 100%;
  animation: skeleton 1.2s linear infinite;
  border-radius: 4px;
}
@keyframes skeleton {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Typography refresh */
body {
  font-feature-settings: "ss01", "kern";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
h1, h2, h3, h4 { letter-spacing: -0.01em; }
h1 { font-weight: 700; }
h2 { font-weight: 650; }
h3 { font-weight: 600; }

/* Button micro-interactions */
.btn, .scenario-card, .meta-badge, .btn-uselang, .btn-audience {
  transition: transform .1s ease, box-shadow .15s ease, background .15s ease;
}
.btn:active, .scenario-card:active, .meta-badge:active { transform: translateY(1px); }

/* Chart cell subtle lift */
.chart-cell {
  transition: box-shadow .2s ease, transform .2s ease;
}
.chart-cell:hover { box-shadow: 0 4px 18px rgba(0,0,0,0.06); }

/* Tooltip easing */
.metric-tooltip-text, .tooltip-content {
  transition: opacity .18s ease;
}

/* Focus-visible consistent outline everywhere */
:focus-visible {
  outline: 2px solid #40916c;
  outline-offset: 2px;
  border-radius: 3px;
}

/* ══════════════ Agent panel & Reviews queue ══════════════ */
.agent-panel {
  max-width: 1000px;
  margin: 0 auto;
  padding: 6px 2px;
}
.agent-panel h2 { margin: 0 0 6px 0; }
.agent-lede { color: var(--text-muted, #555); font-size: 13.5px; line-height: 1.55; max-width: 780px; margin-top: 0; }

.agent-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
  margin: 14px 0 22px 0;
}
.agent-stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 14px 12px 14px;
  text-align: center;
}
.agent-stat-value { font-weight: 700; font-size: 20px; color: #2d6a4f; line-height: 1.15; }
[data-theme="dark"] .agent-stat-value { color: #95d5b2; }
.agent-stat-label { font-size: 11.5px; color: var(--text-muted, #666); margin-top: 4px; text-transform: uppercase; letter-spacing: 0.04em; }

.agent-runs-list {
  margin: 10px 0 20px 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.agent-run-row {
  display: grid;
  grid-template-columns: 16px 1fr auto;
  gap: 10px;
  align-items: center;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  text-decoration: none;
  color: var(--text);
  font-size: 13px;
}
.agent-run-row:hover { background: rgba(64,145,108,0.05); }
.agent-run-dot { width: 12px; height: 12px; border-radius: 50%; }
.agent-run-name { font-weight: 600; }
.agent-run-time { color: var(--text-muted, #666); font-size: 12px; }

/* Reviews queue */
.agent-review-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 10px 0 16px 0;
}
.agent-review-toolbar .spacer { flex: 1; }
.reviews-empty {
  border: 1px dashed var(--border);
  padding: 24px;
  border-radius: 10px;
  text-align: center;
  color: var(--text-muted, #666);
  background: var(--surface);
}
.reviews-list { display: flex; flex-direction: column; gap: 12px; }
.review-card {
  border: 1px solid var(--border);
  border-left: 5px solid #9ca3af;
  border-radius: 8px;
  padding: 12px 14px;
  background: var(--surface);
  transition: border-color .15s ease, background .15s ease;
}
.review-card-approved { border-left-color: #2d6a4f; background: rgba(64,145,108,0.06); }
.review-card-rejected { border-left-color: #b7094c; background: rgba(183,9,76,0.05); opacity: 0.75; }
.review-card-head {
  display: flex;
  gap: 10px;
  align-items: baseline;
  flex-wrap: wrap;
  margin-bottom: 6px;
}
.review-param {
  font-family: ui-monospace, monospace;
  font-weight: 700;
  background: rgba(64,145,108,0.1);
  padding: 1px 7px;
  border-radius: 4px;
  color: #2d6a4f;
}
.review-value { font-size: 14px; }
.review-meta { color: var(--text-muted, #666); font-size: 12px; }
.review-status {
  margin-left: auto;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 10px;
  letter-spacing: 0.04em;
}
.review-status-pending { background: #f1f5f9; color: #475569; }
.review-status-approved { background: rgba(64,145,108,0.15); color: #2d6a4f; }
.review-status-rejected { background: rgba(183,9,76,0.15); color: #b7094c; }
.review-quote {
  border-left: 3px solid var(--border);
  padding: 4px 10px;
  color: var(--text);
  font-size: 13.5px;
  margin: 6px 0 8px 0;
  line-height: 1.5;
}
.review-cite { font-size: 12.5px; color: var(--text-muted, #555); margin-bottom: 8px; }
.review-actions { display: flex; gap: 8px; }

/* Study-detail inside the sources modal */
.study-detail {
  margin: 6px 0 10px 0;
  padding-left: 6px;
  border-left: 2px solid var(--border);
}
.study-quote {
  margin: 4px 0 0 0;
  padding: 4px 10px;
  border-left: 3px solid #40916c;
  color: var(--text-muted, #555);
  font-size: 12.5px;
  font-style: italic;
  line-height: 1.5;
}
.study-tag {
  display: inline-block;
  font-size: 10.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 1px 7px;
  border-radius: 10px;
  margin-left: 6px;
  vertical-align: middle;
}
.study-tag-reviewed { background: rgba(64,145,108,0.15); color: #2d6a4f; }
.study-tag-auto { background: rgba(244,162,97,0.18); color: #9a3412; }

/* ══════════════ Inline scenarios bar on Parameters tab ══════════════ */
.scenarios-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  padding: 14px 14px 12px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(64,145,108,0.05), rgba(38,70,83,0.04));
  margin-bottom: 18px;
}
[data-theme="dark"] .scenarios-bar {
  background: linear-gradient(135deg, rgba(82,183,136,0.10), rgba(148,210,189,0.06));
}
.scenarios-col { display: flex; flex-direction: column; gap: 6px; }
.scenarios-label {
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--text-muted, #555);
}
.scenarios-row { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.scenarios-bar select, .scenarios-bar input[type="text"] {
  flex: 1;
  min-width: 0;
  padding: 6px 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 13px;
}
.inline-compare-panel {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  padding: 16px;
  margin-bottom: 18px;
  animation: locFadeIn .22s ease;
}
.inline-compare-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 10px;
}
.inline-compare-head h3 { margin: 0; font-size: 16px; }
.inline-compare-table { width: 100%; margin-bottom: 14px; font-size: 13px; }
.inline-compare-table td, .inline-compare-table th { padding: 6px 10px; }

.inline-toast {
  position: fixed; bottom: 30px; left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: #2d6a4f; color: #fff;
  padding: 10px 18px;
  border-radius: 24px;
  font-size: 13px;
  opacity: 0;
  transition: opacity .28s ease, transform .28s ease;
  z-index: 9200;
  box-shadow: 0 8px 24px rgba(0,0,0,0.25);
}
.inline-toast-show { opacity: 1; transform: translateX(-50%) translateY(0); }