/* ==========================================================================
   FRONTIER MODEL LADDER - PRODUCTION STYLESHEET
   Site: snapfacts.in (Clean White & Slate Editorial Design System)
   Typography: Space Grotesk (Headings), Inter (Data / Metrics)
   ========================================================================== */

:root {
  --fml-bg: #ffffff;
  --fml-surface: #ffffff;
  --fml-surface-alt: #f8fafc;
  --fml-surface-hover: #f1f5f9;
  --fml-border: #e2e8f0;
  --fml-border-subtle: #f1f5f9;
  --fml-border-strong: #cbd5e1;
  --fml-text-primary: #0f172a;
  --fml-text-secondary: #475569;
  --fml-text-muted: #94a3b8;
  --fml-accent: #0284c7;
  --fml-accent-light: #e0f2fe;
  --fml-accent-glow: rgba(2, 132, 199, 0.15);
  --fml-success: #10b981;
  --fml-warning: #f59e0b;
  --fml-danger: #ef4444;
  --fml-purple: #8b5cf6;
  --fml-cyan: #06b6d4;
  --fml-radius: 12px;
  --fml-radius-sm: 8px;
  --fml-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --fml-shadow-md: 0 4px 12px rgba(15, 23, 42, 0.06);
  --fml-shadow-lg: 0 10px 25px -5px rgba(15, 23, 42, 0.08);
  --fml-transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Dark Mode */
:root[data-theme="dark"],
[data-theme="dark"],
body.dark-theme {
  --fml-bg: #070a10;
  --fml-surface: #0f172a;
  --fml-surface-alt: #1e293b;
  --fml-surface-hover: #334155;
  --fml-border: #1e293b;
  --fml-border-subtle: #1e293b;
  --fml-border-strong: #475569;
  --fml-text-primary: #f8fafc;
  --fml-text-secondary: #cbd5e1;
  --fml-text-muted: #94a3b8;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --fml-bg: #070a10;
    --fml-surface: #0f172a;
    --fml-surface-alt: #1e293b;
    --fml-surface-hover: #334155;
    --fml-border: #1e293b;
    --fml-border-subtle: #1e293b;
    --fml-border-strong: #475569;
    --fml-text-primary: #f8fafc;
    --fml-text-secondary: #cbd5e1;
    --fml-text-muted: #94a3b8;
  }
}

/* Main Container */
.fml-module {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto 2.5rem;
  padding: 0 1rem;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--fml-text-primary);
  box-sizing: border-box;
}

/* Header & Meta Bar */
.fml-header {
  background: var(--fml-surface);
  border: 1px solid var(--fml-border);
  border-radius: var(--fml-radius);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--fml-shadow-sm);
}

.fml-header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--fml-border-subtle);
}

.fml-title-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.fml-title {
  margin: 0;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--fml-text-primary);
  letter-spacing: -0.02em;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.fml-title i, .fml-title svg {
  color: var(--fml-accent);
}

.fml-badge-live {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.fml-badge-live.live {
  background: #ecfdf5;
  color: #059669;
  border: 1px solid #a7f3d0;
}

.fml-badge-live.stale {
  background: #fffbeb;
  color: #d97706;
  border: 1px solid #fde68a;
}

.fml-badge-live.offline {
  background: #fef2f2;
  color: #dc2626;
  border: 1px solid #fecaca;
}

.fml-pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
  animation: fml-pulse 2s infinite ease-in-out;
}

@keyframes fml-pulse {
  0% { transform: scale(0.9); opacity: 0.7; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.7; }
}

.fml-header-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.fml-btn-tool {
  background: var(--fml-surface-alt);
  border: 1px solid var(--fml-border);
  color: var(--fml-text-secondary);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.4rem 0.75rem;
  border-radius: var(--fml-radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: var(--fml-transition);
}

.fml-btn-tool:hover {
  background: var(--fml-surface);
  color: var(--fml-accent);
  border-color: var(--fml-accent);
  transform: translateY(-1px);
}

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

/* Decision Helper & Presets Bar */
.fml-controls-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 0.85rem;
  flex-wrap: wrap;
}

.fml-presets-wrap {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.fml-preset-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--fml-text-muted);
  letter-spacing: 0.04em;
  margin-right: 0.25rem;
}

.fml-preset-pill {
  background: var(--fml-surface-alt);
  border: 1px solid var(--fml-border);
  color: var(--fml-text-secondary);
  font-size: 0.74rem;
  font-weight: 600;
  padding: 0.3rem 0.65rem;
  border-radius: 999px;
  cursor: pointer;
  transition: var(--fml-transition);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.fml-preset-pill:hover {
  border-color: var(--fml-border-strong);
  color: var(--fml-text-primary);
}

.fml-preset-pill.active {
  background: var(--fml-accent-light);
  color: var(--fml-accent);
  border-color: var(--fml-accent);
  font-weight: 700;
}

/* Compare Tray Bar */
.fml-compare-tray {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: var(--fml-radius-sm);
  padding: 0.6rem 0.9rem;
  margin-top: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
  animation: fml-fadeIn 0.2s ease-out;
}

.fml-compare-chips {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.fml-compare-chip {
  background: #ffffff;
  border: 1px solid #93c5fd;
  color: #1e40af;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.fml-compare-chip button {
  background: transparent;
  border: none;
  color: #3b82f6;
  font-size: 0.85rem;
  cursor: pointer;
  padding: 0;
  display: inline-flex;
  line-height: 1;
}

.fml-compare-chip button:hover {
  color: #ef4444;
}

/* Weights Sliders Drawer */
.fml-weights-drawer {
  background: var(--fml-surface-alt);
  border: 1px solid var(--fml-border);
  border-radius: var(--fml-radius-sm);
  padding: 1rem;
  margin-top: 0.85rem;
  animation: fml-fadeIn 0.2s ease-out;
}

.fml-formula-banner {
  background: var(--fml-surface);
  border: 1px dashed var(--fml-border-strong);
  border-radius: 6px;
  padding: 0.55rem 0.85rem;
  margin-bottom: 0.85rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, monospace;
  font-size: 0.78rem;
  color: var(--fml-text-secondary);
}

.fml-formula-banner strong {
  color: var(--fml-accent);
}

.fml-sliders-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
}

.fml-slider-item {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.fml-slider-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.76rem;
  font-weight: 600;
}

.fml-slider-label span {
  color: var(--fml-accent);
}

.fml-slider-item input[type="range"] {
  width: 100%;
  accent-color: var(--fml-accent);
  cursor: pointer;
}

/* THE 4 GRIDS CONTAINER (2x2 Desktop, Stacked Mobile) */
.fml-quad-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

@media (max-width: 1024px) {
  .fml-quad-grid {
    grid-template-columns: 1fr;
  }
}

/* Individual Grid Card Shell */
.fml-card {
  background: var(--fml-surface);
  border: 1px solid var(--fml-border);
  border-radius: var(--fml-radius);
  box-shadow: var(--fml-shadow-sm);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
  min-height: 480px;
}

.fml-card:hover {
  border-color: var(--fml-border-strong);
  box-shadow: var(--fml-shadow-md);
}

.fml-card-header {
  padding: 1rem 1.25rem 0.75rem;
  border-bottom: 1px solid var(--fml-border-subtle);
  background: var(--fml-surface);
}

.fml-card-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.fml-card-title {
  margin: 0;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--fml-text-primary);
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.fml-card-title i, .fml-card-title svg {
  color: var(--fml-accent);
  font-size: 0.95rem;
}

.fml-card-helper {
  margin: 0.3rem 0 0;
  font-size: 0.74rem;
  color: var(--fml-text-muted);
  line-height: 1.4;
}

.fml-card-toolbar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* Category Filter Tabs (Grid 1) */
.fml-tabs {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  overflow-x: auto;
  padding: 0.65rem 1.25rem 0;
  scrollbar-width: none;
}

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

.fml-tab-btn {
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--fml-text-secondary);
  font-size: 0.76rem;
  font-weight: 600;
  padding: 0.35rem 0.55rem 0.5rem;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--fml-transition);
}

.fml-tab-btn:hover {
  color: var(--fml-text-primary);
}

.fml-tab-btn.active {
  color: var(--fml-accent);
  border-bottom-color: var(--fml-accent);
  font-weight: 700;
}

/* Card Body Content */
.fml-card-body {
  padding: 1rem 1.25rem;
  flex: 1;
  position: relative;
  overflow-y: auto;
  max-height: 520px;
}

/* ==========================================================================
   GRID 1 - LADDER (Arena Elo + Confidence Intervals)
   ========================================================================== */
.fml-ladder-list {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.fml-ladder-row {
  display: grid;
  grid-template-columns: 28px 150px 1fr 65px;
  align-items: center;
  gap: 0.65rem;
  padding: 0.45rem 0.65rem;
  border-radius: var(--fml-radius-sm);
  background: var(--fml-surface-alt);
  border: 1px solid var(--fml-border-subtle);
  cursor: pointer;
  transition: var(--fml-transition);
}

.fml-ladder-row:hover,
.fml-ladder-row.is-hovered {
  background: #f0f9ff;
  border-color: #7dd3fc;
  transform: translateX(2px);
}

.fml-ladder-row.is-selected {
  background: #e0f2fe;
  border-color: var(--fml-accent);
  box-shadow: 0 0 0 1px var(--fml-accent);
}

.fml-ladder-rank {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--fml-text-muted);
  text-align: center;
}

.fml-ladder-row.rank-1 .fml-ladder-rank { color: #d97706; font-size: 0.95rem; }
.fml-ladder-row.rank-2 .fml-ladder-rank { color: #64748b; }
.fml-ladder-row.rank-3 .fml-ladder-rank { color: #b45309; }

.fml-ladder-info {
  overflow: hidden;
}

.fml-ladder-name {
  font-size: 0.82rem;
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--fml-text-primary);
  display: block;
}

.fml-ladder-meta {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.68rem;
  color: var(--fml-text-muted);
}

.fml-rank-delta {
  font-size: 0.68rem;
  font-weight: 700;
}

.fml-rank-delta.up { color: var(--fml-success); }
.fml-rank-delta.down { color: var(--fml-danger); }
.fml-rank-delta.same { color: var(--fml-text-muted); }

/* Dot & Whisker CI Bar */
.fml-ci-track {
  position: relative;
  height: 22px;
  background: rgba(0, 0, 0, 0.03);
  border-radius: 4px;
  display: flex;
  align-items: center;
}

.fml-ci-whisker {
  position: absolute;
  height: 6px;
  background: #bae6fd;
  border-radius: 3px;
  top: 8px;
}

.fml-ci-dot {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--fml-accent);
  top: 6px;
  transform: translateX(-50%);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
  transition: transform 0.18s ease;
}

.fml-ladder-row:hover .fml-ci-dot {
  transform: translateX(-50%) scale(1.3);
  background: #0369a1;
}

.fml-ladder-score {
  text-align: right;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--fml-text-primary);
}

.fml-tie-badge {
  display: inline-block;
  font-size: 0.62rem;
  font-weight: 700;
  color: #d97706;
  background: #fef3c7;
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  margin-left: 0.25rem;
}

/* ==========================================================================
   GRID 2 - EVAL PROFILE (Radar & Heatmap Views)
   ========================================================================== */
.fml-eval-heatmap {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.76rem;
}

.fml-eval-heatmap th {
  text-align: center;
  padding: 0.45rem 0.5rem;
  font-weight: 700;
  font-size: 0.72rem;
  color: var(--fml-text-muted);
  border-bottom: 1px solid var(--fml-border);
  position: sticky;
  top: 0;
  background: var(--fml-surface);
  z-index: 2;
}

.fml-eval-heatmap th:first-child {
  text-align: left;
  min-width: 130px;
}

.fml-eval-heatmap td {
  padding: 0.45rem 0.4rem;
  text-align: center;
  border-bottom: 1px solid var(--fml-border-subtle);
  position: relative;
  cursor: pointer;
  transition: background 0.15s;
}

.fml-eval-heatmap td:first-child {
  text-align: left;
  font-weight: 600;
}

.fml-heat-cell {
  border-radius: 4px;
  padding: 0.2rem 0.3rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.2rem;
  min-width: 44px;
}

.fml-crown {
  font-size: 0.65rem;
  color: #f59e0b;
}

.fml-nr {
  color: var(--fml-text-muted);
  font-style: italic;
  font-weight: 400;
  font-size: 0.7rem;
}

/* Radar Chart Canvas */
.fml-radar-wrap {
  width: 100%;
  height: 380px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.fml-radar-svg {
  width: 100%;
  height: 100%;
  max-width: 420px;
  max-height: 380px;
}

.fml-radar-legend {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
  font-size: 0.72rem;
}

.fml-legend-item {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-weight: 600;
}

.fml-legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

/* ==========================================================================
   GRID 3 - VALUE (Pareto Frontier & Price Scatter Plot)
   ========================================================================== */
.fml-value-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.5rem 1.25rem 0;
  flex-wrap: wrap;
  font-size: 0.75rem;
}

.fml-budget-slider-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.fml-scatter-canvas-wrap {
  position: relative;
  width: 100%;
  height: 360px;
  margin-top: 0.5rem;
}

.fml-scatter-svg {
  width: 100%;
  height: 100%;
}

.fml-pareto-line {
  stroke: #f59e0b;
  stroke-width: 2;
  stroke-dasharray: 4, 3;
  fill: none;
}

.fml-scatter-point {
  cursor: pointer;
  transition: transform 0.18s, filter 0.18s;
}

.fml-scatter-point:hover,
.fml-scatter-point.is-hovered {
  transform: scale(1.4);
  filter: drop-shadow(0 2px 6px rgba(0, 0, 0, 0.25));
}

.fml-scatter-point.dimmed {
  opacity: 0.18;
}

.fml-pareto-badge {
  font-size: 0.65rem;
  font-weight: 700;
  fill: #d97706;
}

/* ==========================================================================
   GRID 4 - SPECS & SPEED (Sortable Capability Matrix)
   ========================================================================== */
.fml-specs-table-wrap {
  overflow-x: auto;
  width: 100%;
}

.fml-specs-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.76rem;
  white-space: nowrap;
}

.fml-specs-table th {
  background: var(--fml-surface);
  color: var(--fml-text-muted);
  font-weight: 700;
  padding: 0.45rem 0.65rem;
  border-bottom: 1px solid var(--fml-border);
  text-align: left;
  cursor: pointer;
  user-select: none;
}

.fml-specs-table th:hover {
  color: var(--fml-text-primary);
}

.fml-specs-table th.sorted-asc::after { content: " ▲"; color: var(--fml-accent); font-size: 0.65rem; }
.fml-specs-table th.sorted-desc::after { content: " ▼"; color: var(--fml-accent); font-size: 0.65rem; }

.fml-specs-table td {
  padding: 0.45rem 0.65rem;
  border-bottom: 1px solid var(--fml-border-subtle);
  color: var(--fml-text-secondary);
}

.fml-specs-row {
  cursor: pointer;
  transition: background 0.15s;
}

.fml-specs-row:hover,
.fml-specs-row.is-hovered {
  background: #f0f9ff;
}

.fml-specs-row.is-selected {
  background: #e0f2fe;
}

.fml-mini-bar-track {
  width: 70px;
  height: 6px;
  background: #e2e8f0;
  border-radius: 3px;
  display: inline-block;
  margin-right: 0.35rem;
  vertical-align: middle;
}

.fml-mini-bar-fill {
  height: 100%;
  border-radius: 3px;
  background: var(--fml-accent);
}

.fml-mini-bar-fill.speed { background: var(--fml-success); }

.fml-modality-icons {
  display: inline-flex;
  gap: 0.3rem;
  color: var(--fml-text-muted);
}

.fml-modality-icons .active {
  color: var(--fml-text-primary);
}

.fml-license-tag {
  font-size: 0.68rem;
  font-weight: 600;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
}

.fml-license-tag.open-weights {
  background: #ecfdf5;
  color: #059669;
  border: 1px solid #a7f3d0;
}

.fml-license-tag.proprietary {
  background: #f1f5f9;
  color: #475569;
  border: 1px solid #cbd5e1;
}

/* ==========================================================================
   INTERACTIVE TOOLTIPS & METHODOLOGY DRAWER
   ========================================================================== */
.fml-tooltip {
  position: absolute;
  z-index: 1000;
  background: #0f172a;
  color: #ffffff;
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  font-size: 0.72rem;
  line-height: 1.35;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
  pointer-events: none;
  max-width: 250px;
  opacity: 0;
  transition: opacity 0.15s ease-out;
}

.fml-tooltip.visible {
  opacity: 1;
}

.fml-tooltip-title {
  font-weight: 700;
  color: #38bdf8;
  margin-bottom: 0.2rem;
}

.fml-methodology-drawer {
  background: var(--fml-surface);
  border: 1px solid var(--fml-border);
  border-radius: var(--fml-radius);
  padding: 1.25rem;
  margin-top: 1rem;
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--fml-text-secondary);
  animation: fml-fadeIn 0.25s ease-out;
}

.fml-methodology-drawer h4 {
  font-family: 'Space Grotesk', sans-serif;
  color: var(--fml-text-primary);
  margin: 0 0 0.5rem;
}

.fml-glossary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin-top: 0.85rem;
}

.fml-glossary-item strong {
  color: var(--fml-text-primary);
  display: block;
  margin-bottom: 0.15rem;
}

/* Animations */
@keyframes fml-fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Responsive Overrides */
@media (max-width: 768px) {
  .fml-module {
    padding: 0 0.5rem;
  }
  
  .fml-ladder-row {
    grid-template-columns: 24px 110px 1fr 50px;
    font-size: 0.76rem;
  }
  
  .fml-header {
    padding: 1rem;
  }
}