/* ============================================================
   VISUALIZE AI - Design System & Styles
   Dark theme dashboard for AI milestone visualization
   ============================================================ */

/* --- Design Tokens --- */
:root {
  --bg-primary: #1a1a1a;
  --bg-secondary: #2d2d2d;
  --bg-tertiary: #424242;
  --bg-card: #242424;
  --text-primary: #e0e0e0;
  --text-secondary: #a0a0a0;
  --text-muted: #909090;
  --accent-blue: #2196F3;
  --accent-purple: #9C27B0;
  --accent-cyan: #00BCD4;
  --layer1-purple: #9C27B0;
  --layer2-orange: #FF9800;
  --layer4-blue: #2196F3;
  --layer5-green: #4CAF50;
  --layer1-bg: rgba(156, 39, 176, 0.08);
  --layer2-bg: rgba(255, 152, 0, 0.08);
  --layer4-bg: rgba(33, 150, 243, 0.08);
  --layer5-bg: rgba(76, 175, 80, 0.08);
  --border-color: rgba(255,255,255,0.12);
  --border-light: rgba(255,255,255,0.22);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.5);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Monaco", "Menlo", "Courier New", monospace;
  --gradient-hero: linear-gradient(135deg, #9C27B0 0%, #2196F3 50%, #00BCD4 100%);
  --gradient-btn: linear-gradient(135deg, #2196F3 0%, #00BCD4 100%);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

a {
  color: var(--accent-blue);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-cyan);
  text-decoration: underline;
}

img { max-width: 100%; display: block; }

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.25rem; }

/* --- Navigation --- */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  height: 56px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-brand:hover {
  color: var(--text-primary);
  text-decoration: none;
}

.nav-brand-icon {
  width: 28px;
  height: 28px;
  background: var(--gradient-hero);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
}

.nav-links {
  display: flex;
  gap: 0.25rem;
  list-style: none;
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.nav-links a:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  text-decoration: none;
}

.nav-links a.active {
  background: rgba(33, 150, 243, 0.15);
  color: var(--accent-blue);
}

/* --- Hero Section --- */
.hero {
  text-align: center;
  padding: 5rem 1.5rem 4rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(33, 150, 243, 0.08) 0%, transparent 60%);
  pointer-events: none;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  margin-bottom: 1rem;
}

.hero-title {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1rem;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition-normal);
  text-decoration: none;
  line-height: 1.4;
}

.btn:hover { text-decoration: none; }

.btn-primary {
  background: var(--gradient-btn);
  color: #fff;
  box-shadow: 0 2px 8px rgba(33, 150, 243, 0.3);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(33, 150, 243, 0.4);
  color: #fff;
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-light);
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.15);
  color: #fff;
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.8125rem;
}

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 1rem;
}

.btn-icon:hover {
  background: rgba(255,255,255,0.15);
  color: #fff;
}

/* --- Stats Grid --- */
.stats-section {
  padding: 0 1.5rem 4rem;
  max-width: 900px;
  margin: 0 auto;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  text-align: center;
  transition: all var(--transition-normal);
}

.stat-card:hover {
  border-color: var(--border-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.stat-value {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.25rem;
}

.stat-value.gradient {
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 500;
}

/* --- Layer Badges & Colors --- */
.layer-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.625rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.layer-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.layer-1 .layer-dot, .dot-layer1 { background-color: var(--layer1-purple); }
.layer-2 .layer-dot, .dot-layer2 { background-color: var(--layer2-orange); }
.layer-4 .layer-dot, .dot-layer4 { background-color: var(--layer4-blue); }
.layer-5 .layer-dot, .dot-layer5 { background-color: var(--layer5-green); }

.layer-1 { background: var(--layer1-bg); color: var(--layer1-purple); }
.layer-2 { background: var(--layer2-bg); color: var(--layer2-orange); }
.layer-4 { background: var(--layer4-bg); color: var(--layer4-blue); }
.layer-5 { background: var(--layer5-bg); color: var(--layer5-green); }

/* --- Footer --- */
.footer {
  padding: 2rem 1.5rem;
  text-align: center;
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.8125rem;
}

.footer a { color: var(--text-secondary); }

/* --- Page Container --- */
.page-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.5rem;
}

/* ============================================================
   HOME DASHBOARD LAYOUT
   ============================================================ */

.home-dashboard {
  overflow: hidden;
}

.home-shell {
  display: flex;
  min-height: 100vh;
}

/* On mobile, allow natural scroll flow — graph above fold, data below */
@media (max-width: 767px) {
  .home-dashboard {
    overflow-x: hidden;
    overflow-y: auto;
  }
}

.home-sidebar {
  flex: 0 0 15%;
  min-width: 190px;
  max-width: 280px;
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
  padding: 1.125rem 1rem;
  border-right: 1px solid var(--border-color);
  background:
    radial-gradient(circle at 10% 0%, rgba(33, 150, 243, 0.16), transparent 55%),
    linear-gradient(180deg, #252525 0%, #1f1f1f 100%);
}

.home-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-primary);
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.home-brand:hover {
  color: var(--text-primary);
  text-decoration: none;
}

.home-brand-icon {
  width: 26px;
  height: 26px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-hero);
  font-size: 0.75rem;
}

.home-sidebar-title {
  font-size: 1.05rem;
  line-height: 1.35;
}

.home-sidebar-subtitle {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

.home-nav {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.home-nav a {
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.625rem;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.home-nav a:hover {
  color: var(--text-primary);
  text-decoration: none;
  background: var(--bg-tertiary);
}

.home-nav a.active {
  color: var(--accent-blue);
  background: rgba(33, 150, 243, 0.12);
}

.home-sidebar-meta {
  margin-top: auto;
  border-top: 1px solid var(--border-color);
  padding-top: 0.75rem;
  font-size: 0.75rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.home-sidebar-meta a {
  color: var(--text-secondary);
}

.home-main {
  flex: 1;
  min-width: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
}

.home-panel {
  min-height: 0;
}

.home-panel-graph {
  flex: 0 0 60%;
  border-bottom: 1px solid var(--border-color);
}

.home-panel-graph .graph-page {
  height: 100%;
}

.home-panel-graph .graph-toolbar {
  padding: 0.625rem 1rem;
}

.home-panel-graph .graph-toolbar h2 {
  font-size: 0.9375rem;
}

.home-panel-graph .graph-container {
  padding: 0.25rem 0.875rem 0.5rem;
}

.home-panel-graph .animation-controls {
  padding: 0.625rem 1rem;
}

.home-panel-chart {
  flex: 0 0 40%;
}

.home-panel-chart .chart-page {
  max-width: none;
  margin: 0;
  padding: 0.75rem 1rem 1rem;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.home-panel-chart .chart-page h2 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.home-panel-chart .filters-bar {
  margin-bottom: 0.625rem;
  padding: 0.75rem;
  gap: 0.5rem;
}

.home-panel-chart .filter-group label {
  font-size: 0.625rem;
}

.home-panel-chart .filter-select {
  min-width: 104px;
}

.home-panel-chart .search-input {
  min-width: 150px;
}

.home-panel-chart .table-container {
  flex: 1;
  min-height: 0;
  overflow: auto;
}

.home-panel-chart .table-footer {
  padding: 0.5rem 0.75rem;
}

/* ============================================================
   GRAPH PAGE
   ============================================================ */

.graph-page {
  display: flex;
  flex-direction: column;
  height: calc(100vh - 56px);
}

.graph-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 0.75rem 1.5rem;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.graph-toolbar-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.graph-toolbar h2 {
  font-size: 1rem;
  font-weight: 600;
  white-space: nowrap;
}

.layer-toggles {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  flex-wrap: wrap;
}

.layer-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.625rem;
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

.layer-toggle:hover {
  border-color: var(--border-light);
}

.layer-toggle input[type="checkbox"] {
  accent-color: var(--accent-blue);
  cursor: pointer;
  width: 14px;
  height: 14px;
}

.layer-toggle-count {
  color: var(--text-muted);
  font-size: 0.75rem;
}

.toggle-actions {
  display: flex;
  gap: 0.375rem;
}

.graph-container {
  flex: 1;
  position: relative;
  min-height: 0;
  padding: 0.5rem 1rem;
}

.graph-container canvas {
  width: 100% !important;
  height: 100% !important;
}

/* --- Animation Controls --- */
.animation-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1.5rem;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  flex-wrap: wrap;
}

.anim-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.play-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--gradient-btn);
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.play-btn:hover {
  transform: scale(1.08);
  box-shadow: 0 2px 12px rgba(33, 150, 243, 0.4);
}

.play-btn:active {
  transform: scale(0.96);
}

.progress-group {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 200px;
}

.progress-slider {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  background: var(--bg-tertiary);
  border-radius: 3px;
  outline: none;
  cursor: pointer;
}

.progress-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-blue);
  cursor: pointer;
  border: 2px solid var(--bg-secondary);
  box-shadow: 0 1px 4px rgba(0,0,0,0.3);
  transition: transform var(--transition-fast);
}

.progress-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.progress-slider::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-blue);
  cursor: pointer;
  border: 2px solid var(--bg-secondary);
  box-shadow: 0 1px 4px rgba(0,0,0,0.3);
}

.progress-date {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  min-width: 100px;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.speed-select, .filter-select {
  padding: 0.375rem 0.625rem;
  border-radius: var(--radius-sm);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  font-family: inherit;
  font-size: 0.8125rem;
  cursor: pointer;
  outline: none;
  transition: border-color var(--transition-fast);
}

.speed-select:focus, .filter-select:focus {
  border-color: var(--accent-blue);
}

.loop-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  cursor: pointer;
  user-select: none;
}

.loop-toggle input {
  accent-color: var(--accent-blue);
  cursor: pointer;
}

/* --- Custom Tooltip --- */
.chart-tooltip {
  position: absolute;
  pointer-events: none;
  background: rgba(30, 30, 30, 0.96);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 0.875rem 1rem;
  max-width: 320px;
  box-shadow: var(--shadow-lg);
  font-size: 0.8125rem;
  line-height: 1.5;
  z-index: 200;
  opacity: 0;
  transition: opacity 150ms ease;
}

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

.tooltip-title {
  font-size: 0.9375rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.tooltip-subtitle {
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.tooltip-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1rem;
  margin-bottom: 0.5rem;
}

.tooltip-meta span {
  color: var(--text-secondary);
}

.tooltip-meta strong {
  color: var(--text-primary);
  font-weight: 500;
}

.tooltip-desc {
  color: var(--text-secondary);
  border-top: 1px solid var(--border-color);
  padding-top: 0.5rem;
  margin-top: 0.25rem;
}

.tooltip-notable {
  color: var(--accent-cyan);
  font-style: italic;
  margin-top: 0.375rem;
}

/* ============================================================
   CHART (TABLE) PAGE
   ============================================================ */

.chart-page {
  padding: 1.5rem;
  max-width: 1400px;
  margin: 0 auto;
}

.chart-page h2 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

/* --- Filters Bar --- */
.filters-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: flex-end;
  padding: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  margin-bottom: 1rem;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.filter-group label {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  font-weight: 600;
}

.filter-select {
  min-width: 120px;
}

.search-input {
  padding: 0.375rem 0.625rem;
  border-radius: var(--radius-sm);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  font-family: inherit;
  font-size: 0.8125rem;
  outline: none;
  transition: border-color var(--transition-fast);
  min-width: 180px;
}

.search-input:focus {
  border-color: var(--accent-blue);
}

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

.filter-actions {
  display: flex;
  gap: 0.5rem;
  align-items: flex-end;
}

/* --- Data Table --- */
.table-container {
  overflow-x: auto;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8125rem;
}

.data-table th {
  position: sticky;
  top: 0;
  background: var(--bg-secondary);
  padding: 0.75rem 0.75rem;
  text-align: left;
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: #c0c0c0;
  border-bottom: 2px solid var(--border-color);
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  transition: color var(--transition-fast);
}

.data-table th:hover {
  color: #fff;
}

.data-table th.sorted-asc::after { content: " \25B2"; color: var(--accent-blue); }
.data-table th.sorted-desc::after { content: " \25BC"; color: var(--accent-blue); }

.data-table td {
  padding: 0.625rem 0.75rem;
  border-bottom: 1px solid var(--border-color);
  vertical-align: top;
}

.data-table tbody tr {
  transition: background var(--transition-fast);
}

.data-table tbody tr:hover {
  background: rgba(255, 255, 255, 0.03);
}

.data-table tbody tr.row-layer1 { border-left: 3px solid var(--layer1-purple); }
.data-table tbody tr.row-layer2 { border-left: 3px solid var(--layer2-orange); }
.data-table tbody tr.row-layer4 { border-left: 3px solid var(--layer4-blue); }
.data-table tbody tr.row-layer5 { border-left: 3px solid var(--layer5-green); }

.data-table .col-significance {
  max-width: 250px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: #b8b8b8;
}

.data-table .col-significance:hover {
  white-space: normal;
  overflow: visible;
}

.oss-badge {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  border-radius: 999px;
  font-size: 0.6875rem;
  font-weight: 600;
}

.oss-yes {
  background: rgba(76, 175, 80, 0.15);
  color: var(--layer5-green);
}

.oss-no {
  background: rgba(255, 255, 255, 0.07);
  color: #b0b0b0;
}

.table-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1rem;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--border-color);
}

/* --- Table Pagination --- */
.table-pagination {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex-wrap: wrap;
  padding: 0.5rem 1rem;
  border-top: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

.pagination-info {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-right: 0.5rem;
}

.pagination-ellipsis {
  padding: 0 0.25rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.btn-primary {
  background: var(--accent-blue) !important;
  color: #fff !important;
  border-color: var(--accent-blue) !important;
}

/* --- Mobile Card Layout --- */
.card-list {
  display: none;
}

.milestone-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  margin-bottom: 0.75rem;
}

.milestone-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.milestone-card-title {
  font-weight: 600;
  font-size: 0.9375rem;
}

.milestone-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.milestone-card-meta strong {
  color: var(--text-primary);
  font-weight: 500;
}

.milestone-card-desc {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-top: 0.5rem;
  line-height: 1.5;
}

/* --- Layers Section (Homepage) --- */
.layers-section {
  padding: 0 1.5rem 4rem;
  max-width: 900px;
  margin: 0 auto;
}

.layers-section h2 {
  text-align: center;
  margin-bottom: 1.5rem;
  font-size: 1.25rem;
  color: var(--text-secondary);
}

.layer-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}

.layer-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  transition: all var(--transition-normal);
}

.layer-card:hover {
  border-color: var(--border-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.layer-card-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.layer-card-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.layer-card-count {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.125rem;
}

.layer-card-desc {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

/* ============================================================
   MOBILE FIRST (<768px) — Graph is the hero
   ============================================================ */
@media (max-width: 767px) {

  /* --- Shell: natural vertical stacking, page scrolls --- */
  .home-shell {
    flex-direction: column;
    min-height: 100vh;
    height: auto;
    overflow: visible;
  }

  .home-sidebar {
    min-width: 0;
    max-width: none;
    width: 100%;
    flex: 0 0 auto;
    border-right: 0;
    border-bottom: 1px solid var(--border-color);
    padding: 0.375rem 0.75rem;
    gap: 0.375rem;
    /* Single-line layout */
    flex-direction: row;
    align-items: center;
    flex-wrap: nowrap;
    overflow: hidden;
    /* Sticky so brand + nav stay at top while user scrolls */
    position: sticky;
    top: 0;
    z-index: 50;
    background:
      radial-gradient(circle at 10% 0%, rgba(33, 150, 243, 0.16), transparent 55%),
      linear-gradient(180deg, #252525 0%, #1f1f1f 100%);
  }

  /* Hide verbose content — keep only brand + nav */
  .home-sidebar-title,
  .home-sidebar-subtitle,
  .home-sidebar-meta {
    display: none;
  }

  .home-brand {
    font-size: 0.8125rem;
    white-space: nowrap;
    flex-shrink: 0;
  }

  .home-nav {
    flex-direction: row;
    flex-wrap: nowrap;
    gap: 0.25rem;
    margin-left: auto;
    flex-shrink: 0;
  }

  .home-nav a {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
  }

  /* --- Main area: natural vertical stack --- */
  .home-main {
    flex: 1;
    height: auto;
    min-height: 0;
    display: flex;
    flex-direction: column;
    overflow: visible;
  }

  /* --- Graph panel: FILL VIEWPORT above the fold (page scrolls below) --- */
  .home-panel-graph {
    /* ~100svh minus the slim sticky sidebar (~44px) */
    height: calc(100svh - 44px);
    min-height: 280px;   /* never collapse to nothing on tiny screens */
    border-bottom: 1px solid var(--border-color);
    overflow: hidden;
    flex-shrink: 0;
  }

  .home-panel-graph .graph-page {
    height: 100%;
    display: flex;
    flex-direction: column;
  }

  /* Compact toolbar — title tiny, toggles in one scrollable row */
  .home-panel-graph .graph-toolbar {
    padding: 0.25rem 0.625rem;
    gap: 0.25rem;
    flex-direction: column;
    align-items: stretch;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
  }

  .home-panel-graph .graph-toolbar h2 {
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: 0.125rem;
  }

  .home-panel-graph .graph-toolbar-left {
    flex-direction: column;
    gap: 0.25rem;
    align-items: stretch;
  }

  /* Layer toggles: horizontal scrollable row of compact pills */
  .home-panel-graph .layer-toggles {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    overflow-x: auto;
    gap: 0.375rem;
    padding-bottom: 2px;   /* space for scroll bar on some browsers */
    align-items: center;
    /* hide scrollbar visually */
    scrollbar-width: none;
  }
  .home-panel-graph .layer-toggles::-webkit-scrollbar { display: none; }

  .home-panel-graph .layer-toggle {
    padding: 0.125rem 0.5rem;
    font-size: 0.6875rem;
    white-space: nowrap;
    flex-shrink: 0;
    gap: 0.25rem;
    border-radius: 999px;   /* pill shape */
  }

  .home-panel-graph .layer-toggle input[type="checkbox"] {
    width: 11px;
    height: 11px;
  }

  .home-panel-graph .layer-toggle-count {
    font-size: 0.625rem;
  }

  .home-panel-graph .toggle-actions {
    flex-shrink: 0;
    gap: 0.25rem;
  }

  .home-panel-graph .toggle-actions .btn-sm {
    padding: 0.125rem 0.5rem;
    font-size: 0.625rem;
  }

  /* Graph canvas: stretch to fill remaining space */
  .home-panel-graph .graph-container {
    flex: 1;
    min-height: 0;
    padding: 0.125rem 0.375rem;
  }

  /* Animation controls: single compact row */
  .home-panel-graph .animation-controls {
    padding: 0.25rem 0.625rem;
    gap: 0.5rem;
    flex-wrap: nowrap;
    flex-shrink: 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    min-height: 0;
    align-items: center;
  }

  .play-btn {
    width: 30px;
    height: 30px;
    font-size: 0.75rem;
    flex-shrink: 0;
  }

  .progress-group {
    flex: 1;
    min-width: 0;
    gap: 0.375rem;
  }

  .progress-date {
    font-size: 0.6875rem;
    min-width: 68px;
  }

  .speed-select {
    padding: 0.25rem 0.375rem;
    font-size: 0.6875rem;
    flex-shrink: 0;
  }

  .loop-toggle {
    font-size: 0.6875rem;
    flex-shrink: 0;
    gap: 0.25rem;
  }

  /* --- Chart/table panel: below the fold, natural height --- */
  .home-panel-chart {
    flex: 0 0 auto;
    min-height: 50vh;
    overflow: visible;
  }

  .home-panel-chart .chart-page {
    padding: 0.625rem 0.75rem 1rem;
  }

  .home-panel-chart .chart-page h2 {
    font-size: 0.875rem;
    margin-bottom: 0.375rem;
  }

  .home-panel-chart .filters-bar {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding: 0.5rem;
    gap: 0.375rem;
    scrollbar-width: none;
  }
  .home-panel-chart .filters-bar::-webkit-scrollbar { display: none; }

  .home-panel-chart .filter-group {
    min-width: max-content;
  }

  .home-panel-chart .search-input {
    min-width: 150px;
  }

  /* Table hidden on mobile, card list shown */
  .table-container { display: none; }
  .card-list { display: block; }

  /* --- Legend in graph: 2-col grid so all 4 always visible --- */
  /* The chart.js legend is rendered in the canvas; handled via JS options.
     But for any HTML legend, force 2-column layout. */
  .chart-legend,
  .graph-legend {
    display: grid !important;
    grid-template-columns: 1fr 1fr !important;
    gap: 0.25rem 0.75rem !important;
    font-size: 0.6875rem !important;
  }

  /* --- nav/header on graph.html standalone page --- */
  .nav { padding: 0 0.75rem; height: 44px; }
  .nav-brand span { display: none; }
  .nav-links a { padding: 0.375rem 0.5rem; font-size: 0.75rem; }

  /* graph.html standalone: tighter layout */
  .graph-page {
    height: calc(100dvh - 44px);
  }

  .graph-toolbar {
    padding: 0.25rem 0.625rem;
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
  }

  .graph-toolbar h2 {
    font-size: 0.75rem;
    color: var(--text-primary);
  }

  .graph-toolbar-left {
    flex-direction: column;
    gap: 0.25rem;
    align-items: stretch;
  }

  .layer-toggles {
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: none;
    gap: 0.375rem;
    padding-bottom: 2px;
  }
  .layer-toggles::-webkit-scrollbar { display: none; }

  .layer-toggle {
    white-space: nowrap;
    flex-shrink: 0;
    padding: 0.125rem 0.5rem;
    font-size: 0.6875rem;
    border-radius: 999px;
    gap: 0.25rem;
  }

  .layer-toggle input[type="checkbox"] { width: 11px; height: 11px; }
  .layer-toggle-count { font-size: 0.625rem; }

  .toggle-actions .btn-sm {
    padding: 0.125rem 0.5rem;
    font-size: 0.625rem;
  }

  .animation-controls {
    padding: 0.25rem 0.625rem;
    gap: 0.5rem;
    flex-wrap: nowrap;
  }

  .progress-group { min-width: 0; flex: 1; gap: 0.375rem; }
  .progress-date { min-width: 68px; font-size: 0.6875rem; }

  /* Hero / stats pages */
  .hero { padding: 2rem 1rem 1.5rem; }
  .hero-title { font-size: 1.75rem; }
  .stats-grid { grid-template-columns: 1fr 1fr; }

  .filters-bar { padding: 0.75rem; gap: 0.5rem; }
  .filter-select { min-width: 100px; font-size: 0.75rem; }
  .search-input { min-width: 140px; }
}

/* ============================================================
   TABLET (768px – 1023px) — balanced layout
   ============================================================ */
@media (min-width: 768px) and (max-width: 1023px) {
  .home-shell {
    flex-direction: column;
  }

  .home-sidebar {
    min-width: 0;
    max-width: none;
    width: 100%;
    flex: 0 0 auto;
    border-right: 0;
    border-bottom: 1px solid var(--border-color);
    padding: 0.625rem 1rem;
    gap: 0.5rem;
    flex-direction: row;
    align-items: center;
    flex-wrap: wrap;
  }

  .home-sidebar-subtitle {
    display: none;
  }

  .home-sidebar-title {
    font-size: 0.9rem;
  }

  .home-nav {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.375rem;
  }

  .home-sidebar-meta {
    display: none;
  }

  .home-main {
    height: auto;
  }

  .home-panel-graph {
    flex: 0 0 auto;
    height: 56vh;
  }

  .home-panel-chart {
    flex: 1;
    min-height: 44vh;
  }

  .home-panel-chart .filter-select {
    min-width: 96px;
  }

  .home-panel-chart .search-input {
    min-width: 130px;
  }

  /* Compact layer toggles on tablet too */
  .layer-toggles {
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: none;
    gap: 0.5rem;
  }
  .layer-toggles::-webkit-scrollbar { display: none; }

  .layer-toggle {
    white-space: nowrap;
    flex-shrink: 0;
    font-size: 0.75rem;
    border-radius: 999px;
  }

  .data-table .col-hide-tablet { display: none; }
}

@media (min-width: 1024px) {
  .hero { padding: 6rem 2rem 5rem; }
}

@media (min-width: 1440px) {
  .page-content { max-width: 1600px; }
}

/* --- Utility --- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.text-center { text-align: center; }
.text-muted { color: var(--text-secondary); }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }

/* 3D mode utility classes */
.hidden-3d { display: none !important; }
.hidden-2d { display: none !important; }