:root {
  /* Design System - Light Mode */
  --hue-primary: 210;
  --hue-secondary: 160;
  --hue-tertiary: 30;
  
  --color-primary: hsl(var(--hue-primary), 60%, 50%);
  --color-secondary: hsl(var(--hue-secondary), 60%, 40%);
  --color-tertiary: hsl(var(--hue-tertiary), 70%, 50%);
  
  --color-surface: hsl(0, 0%, 98%);
  --color-surface-elevated: hsl(0, 0%, 100%);
  --color-text: hsl(210, 20%, 15%);
  --color-text-secondary: hsl(210, 10%, 40%);
  --color-border: hsl(210, 10%, 85%);
  
  --color-success: hsl(140, 60%, 40%);
  --color-error: hsl(0, 60%, 50%);
  --color-warning: hsl(40, 80%, 50%);
  
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  
  --text-display: 3.0rem;
  --text-h1: 2.25rem;
  --text-h2: 1.75rem;
  --text-h3: 1.375rem;
  --text-body: 1rem;
  --text-sm: 0.875rem;
  
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-inset: inset 0 1px 3px rgba(0, 0, 0, 0.05);
  
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Mode */
[data-theme="dark"] {
  --color-primary: hsl(var(--hue-primary), 80%, 70%);
  --color-secondary: hsl(var(--hue-secondary), 60%, 50%);
  --color-tertiary: hsl(var(--hue-tertiary), 80%, 60%);
  
  --color-surface: hsl(210, 15%, 12%);
  --color-surface-elevated: hsl(210, 15%, 16%);
  --color-text: hsl(0, 0%, 95%);
  --color-text-secondary: hsl(210, 10%, 65%);
  --color-border: hsl(210, 10%, 25%);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-stack);
  color: var(--color-text);
  background: var(--color-surface);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Accessibility: Focus Visible */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Accessibility: Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Typography */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: var(--text-h1); margin-bottom: var(--space-md); }
h2 { font-size: var(--text-h2); margin-bottom: var(--space-md); }
h3 { font-size: var(--text-h3); margin-bottom: var(--space-sm); }

p { margin-bottom: var(--space-md); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  
  padding: 0.6em 1.2em;
  border: none;
  border-radius: var(--radius-lg);
  
  font-family: inherit;
  font-size: var(--text-body);
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  
  background: var(--color-surface-elevated);
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  
  user-select: none;
  white-space: nowrap;
}

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

.btn:active {
  transform: translateY(0) scale(0.98);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: white;
  font-weight: 600;
}

.btn-primary:hover {
  filter: brightness(1.1);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
  background: var(--color-surface-elevated);
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

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

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* Inputs */
input[type="search"],
input[type="number"],
select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface-elevated);
  color: var(--color-text);
  font-family: inherit;
  font-size: var(--text-body);
  transition: border-color var(--transition);
}

input[type="search"]:focus,
input[type="number"]:focus,
select:focus {
  border-color: var(--color-primary);
  outline: none;
  box-shadow: 0 0 0 3px hsla(210, 60%, 50%, 0.15);
}

/* Hero */
.hero {
  position: relative;
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: 
    radial-gradient(circle at 20% 30%, hsla(210, 60%, 50%, 0.15), transparent 50%),
    radial-gradient(circle at 80% 60%, hsla(160, 60%, 40%, 0.1), transparent 60%),
    radial-gradient(circle at 50% 50%, hsla(30, 70%, 50%, 0.08), transparent 70%);
  animation: heroPulse 10s ease-in-out infinite;
}

.mesh {
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%239C92AC' fill-opacity='0.05'%3E%3Ccircle cx='30' cy='30' r='1'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}

.hero-visual {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.6;
  mix-blend-mode: overlay;
}

@keyframes heroPulse {
  0%, 100% { opacity: 0.8; }
  50% { opacity: 1; }
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
  padding: var(--space-2xl);
  text-align: center;
}

.hero-content h1 {
  font-size: var(--text-display);
  margin-bottom: var(--space-md);
}

.glow {
  background: linear-gradient(135deg, var(--color-primary), var(--color-tertiary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  font-size: var(--text-h3);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
  font-weight: 400;
}

.hero-cta {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-lg);
}

.meta-badges {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
}

.badge {
  background: hsla(210, 60%, 50%, 0.1);
  color: var(--color-primary);
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: var(--text-sm);
  font-weight: 600;
  border: 1px solid hsla(210, 60%, 50%, 0.2);
}

/* Theme Toggle in Hero */
.theme-toggle {
  position: absolute;
  top: var(--space-lg);
  right: var(--space-lg);
  background: var(--color-surface-elevated);
  border: none;
  border-radius: var(--radius-lg);
  padding: var(--space-sm);
  font-size: 1.5rem;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  z-index: 10;
}

.theme-toggle:hover {
  transform: rotate(20deg) scale(1.1);
}

/* Main App */
.app {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0;
  background: var(--color-surface);
}

/* Panel Navigation */
.panel-nav {
  display: flex;
  gap: var(--space-xs);
  padding: var(--space-md) var(--space-xl);
  background: var(--color-surface-elevated);
  border-bottom: 1px solid var(--color-border);
  overflow-x: auto;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  color: var(--color-text-secondary);
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition);
}

.nav-item:hover {
  background: hsla(210, 60%, 50%, 0.05);
  color: var(--color-text);
}

.nav-item.active {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.nav-item[aria-selected="true"] {
  background: var(--color-primary);
  color: white;
}

/* Panels */
.panel {
  display: none;
  padding: var(--space-xl);
  animation: fadeIn 0.3s ease;
}

.panel.active {
  display: block;
}

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

.panel-header {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

/* Search & Filters */
.search-bar {
  display: flex;
  gap: var(--space-md);
}

.search-bar input {
  flex: 1;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.filter-group label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.chip {
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--color-border);
  background: var(--color-surface-elevated);
  border-radius: 999px;
  font-size: var(--text-sm);
  cursor: pointer;
  transition: all var(--transition);
}

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

.chip.active {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

/* Grid System */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.dino-card {
  background: var(--color-surface-elevated);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.dino-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.dino-card.selected {
  border-color: var(--color-secondary);
  background: linear-gradient(135deg, hsla(160,60%,40%,0.05), transparent);
}

.dino-card header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: var(--space-sm);
}

.dino-card h3 {
  font-size: var(--text-h3);
  margin: 0;
}

.dino-card .meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  font-size: var(--text-sm);
}

.dino-card .meta div {
  display: flex;
  justify-content: space-between;
}

.diet-carnivore { color: hsl(0, 60%, 50%); font-weight: 600; }
.diet-herbivore { color: hsl(120, 60%, 40%); font-weight: 600; }
.diet-omnivore { color: hsl(30, 60%, 50%); font-weight: 600; }

.dino-card .actions {
  display: flex;
  gap: var(--space-sm);
  margin-top: auto;
}

.dino-card .actions .btn {
  flex: 1;
  justify-content: center;
  padding: 0.5rem;
}

/* Timeline */
.timeline-container {
  position: relative;
  background: var(--color-surface-elevated);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  min-height: 300px;
  overflow-x: auto;
  box-shadow: var(--shadow-sm);
}

.era-markers {
  display: flex;
  gap: var(--space-xs);
  margin-bottom: var(--space-lg);
}

.era {
  flex: 1;
  padding: var(--space-md);
  text-align: center;
  border-radius: var(--radius-md);
  background: hsla(210, 60%, 50%, 0.05);
  border: 1px solid var(--color-border);
  font-weight: 600;
  font-size: var(--text-sm);
}

.era small {
  display: block;
  font-weight: 400;
  opacity: 0.7;
}

.timeline-controls {
  display: flex;
  gap: var(--space-md);
  align-items: center;
  flex-wrap: wrap;
}

.timeline-axis {
  position: relative;
  height: 30px;
  margin-bottom: var(--space-md);
  border-left: 2px solid var(--color-border);
  display: flex;
  align-items: center;
}

.tick {
  position: absolute;
  height: 10px;
  width: 1px;
  background: var(--color-border);
  top: 10px;
  font-size: 10px;
}

.tick span {
  position: absolute;
  top: 15px;
  left: 4px;
  white-space: nowrap;
  transform: rotate(-45deg);
  transform-origin: left top;
}

.timeline-items {
  position: relative;
  min-height: 200px;
  background: hsla(210, 60%, 50%, 0.02);
  border-radius: var(--radius-md);
}

.timeline-item {
  position: absolute;
  height: 12px;
  border-radius: 999px;
  cursor: pointer;
  transition: all var(--transition);
  opacity: 0.8;
}

.timeline-item:hover {
  height: 16px;
  opacity: 1;
  transform: translateY(-2px);
  box-shadow: 0 0 8px currentColor;
}

.timeline-item .tooltip {
  position: absolute;
  bottom: 120%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-surface-elevated);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  white-space: nowrap;
  font-size: var(--text-sm);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
  border: 1px solid var(--color-border);
}

.timeline-item:hover .tooltip {
  opacity: 1;
}

.timeline-legend {
  display: flex;
  gap: var(--space-lg);
  justify-content: center;
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.legend-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  display: inline-block;
  margin-right: var(--space-xs);
}

/* Calculations */
.calc-methods {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-lg);
}

.method-card {
  background: var(--color-surface-elevated);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.method-card h3 {
  color: var(--color-primary);
}

.method-card .demo {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  background: hsla(210, 60%, 50%, 0.03);
  padding: var(--space-md);
  border-radius: var(--radius-md);
}

.method-card .demo input {
  width: 100%;
}

.method-card .demo .toggle-group {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.method-card .demo .toggle-group label {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  cursor: pointer;
}

.method-card .result {
  margin-top: var(--space-sm);
}

.result-box {
  background: linear-gradient(135deg, hsla(210,60%,50%,0.1), hsla(160,60%,40%,0.1));
  padding: var(--space-md);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-primary);
}

.result-box .value {
  font-size: var(--text-h2);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.result-box .range {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
}

.result-box .steps {
  font-family: monospace;
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--color-text);
}

.explanation {
  background: var(--color-surface);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  margin-top: var(--space-sm);
}

.explanation p {
  margin-bottom: var(--space-xs);
}

.explanation em {
  color: var(--color-text-secondary);
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: var(--space-md);
  overflow-y: auto;
}

.modal[hidden] {
  display: none;
}

.modal-content {
  background: var(--color-surface-elevated);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  max-width: 900px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  position: relative;
  animation: modalIn 0.3s ease;
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.close-btn {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-text-secondary);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: var(--transition);
}

.close-btn:hover {
  background: hsla(0, 60%, 50%, 0.1);
  color: var(--color-error);
}

.modal-actions {
  display: flex;
  gap: var(--space-md);
  justify-content: flex-end;
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
}

/* Species Details */
.dino-detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-lg);
}

.detail-section {
  background: hsla(210, 60%, 50%, 0.03);
  padding: var(--space-md);
  border-radius: var(--radius-md);
}

.detail-section h4 {
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.detail-section p {
  margin-bottom: var(--space-xs);
  font-size: var(--text-sm);
}

.detail-raw {
  margin-top: var(--space-xl);
}

.detail-raw pre {
  background: hsla(210, 60%, 50%, 0.05);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  overflow-x: auto;
  font-size: 0.75rem;
  line-height: 1.4;
}

/* Comparison */
.comparison-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--space-md);
}

.compare-card {
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-secondary);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  box-shadow: var(--shadow-sm);
}

.compare-card .title {
  font-weight: 700;
  color: var(--color-secondary);
  font-size: var(--text-h3);
  margin-bottom: var(--space-sm);
}

.compare-card .metric {
  font-size: var(--text-sm);
  display: flex;
  justify-content: space-between;
}

.compare-card .btn {
  margin-top: var(--space-md);
}

/* Charts */
.chart-area {
  background: var(--color-surface-elevated);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  min-height: 400px;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: auto;
}

.chart-controls {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* Docs */
.doc-content {
  background: var(--color-surface-elevated);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-sm);
  line-height: 1.8;
}

.doc-content h1 {
  font-size: var(--text-h1);
  color: var(--color-primary);
  border-bottom: 2px solid var(--color-border);
  padding-bottom: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.doc-content h2 {
  font-size: var(--text-h2);
  color: var(--color-primary);
  margin-top: var(--space-xl);
  margin-bottom: var(--space-md);
}

.doc-content h3 {
  font-size: var(--text-h3);
  margin-top: var(--space-lg);
}

.doc-content code {
  background: hsla(210, 60%, 50%, 0.05);
  padding: 0.2em 0.4em;
  border-radius: var(--radius-sm);
  font-family: 'Monaco', 'Courier New', monospace;
  font-size: 0.9em;
  color: var(--color-primary);
}

.doc-content pre {
  background: hsla(210, 60%, 50%, 0.05);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin: var(--space-md) 0;
  border-left: 4px solid var(--color-primary);
}

.doc-content ul, .doc-content ol {
  margin-left: var(--space-lg);
  margin-bottom: var(--space-md);
}

.doc-content li {
  margin-bottom: var(--space-xs);
}

.doc-content a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 1px solid var(--color-primary);
}

.doc-content a:hover {
  opacity: 0.7;
}

.doc-downloads {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-bottom: var(--space-lg);
}

/* Tests */
.test-results {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.summary {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  padding: var(--space-xl);
  background: linear-gradient(135deg, hsla(210,60%,50%,0.1), hsla(160,60%,40%,0.1));
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-lg);
}

.summary .score {
  font-size: var(--text-h1);
  font-weight: 700;
  color: var(--color-primary);
}

.summary .message {
  font-size: var(--text-h3);
  font-weight: 600;
}

.test-item {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--color-surface-elevated);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-border);
  align-items: start;
}

.test-item.pass {
  border-left-color: var(--color-success);
  background: hsla(140, 60%, 40%, 0.05);
}

.test-item.fail {
  border-left-color: var(--color-error);
  background: hsla(0, 60%, 50%, 0.05);
}

.test-item .status {
  font-weight: 700;
  font-size: var(--text-sm);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  background: currentColor;
  color: white;
  min-width: 60px;
  text-align: center;
}

.test-item.pass .status { background: var(--color-success); }
.test-item.fail .status { background: var(--color-error); }

.test-item .name {
  font-weight: 600;
  flex: 1;
}

.test-item .details {
  font-family: monospace;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-top: var(--space-xs);
}

.coverage-report {
  background: var(--color-surface-elevated);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
}

.coverage-report ul {
  list-style: none;
  margin: 0;
}

.coverage-report li {
  padding: var(--space-sm);
  margin-bottom: var(--space-xs);
  background: hsla(210, 60%, 50%, 0.03);
  border-radius: var(--radius-sm);
}

/* Constants Editor */
.constants-editor {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.const-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
}

.const-group label {
  font-size: var(--text-sm);
  font-weight: 600;
}

#constantsForm {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-md);
  margin: var(--space-lg) 0;
}

/* Toast */
.toast {
  position: fixed;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%) translateY(200%);
  background: var(--color-surface-elevated);
  color: var(--color-text);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: 2000;
  transition: transform var(--transition-slow), opacity var(--transition-slow);
  opacity: 0;
  font-weight: 500;
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

.toast.success { border-left: 4px solid var(--color-success); }
.toast.error { border-left: 4px solid var(--color-error); }
.toast.info { border-left: 4px solid var(--color-primary); }

/* Empty States & Hints */
.empty, .hint {
  text-align: center;
  padding: var(--space-2xl);
  color: var(--color-text-secondary);
  font-size: var(--text-h3);
}

.hint {
  font-size: var(--text-sm);
  font-style: italic;
  opacity: 0.7;
}

/* Actions Bar */
.actions {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* Accessibility: High Contrast Mode */
@media (prefers-contrast: high) {
  :root {
    --color-border: hsl(210, 50%, 20%);
    --shadow-sm: none;
    --shadow-md: none;
    --shadow-lg: none;
  }
  
  .btn {
    border-width: 2px;
  }
}

/* Responsive */
@media (max-width: 768px) {
  :root {
    --text-display: 2.25rem;
    --text-h1: 1.75rem;
    --text-h2: 1.375rem;
    --text-h3: 1.125rem;
  }
  
  .hero {
    min-height: 50vh;
  }
  
  .hero-cta {
    flex-direction: column;
  }
  
  .panel-nav {
    padding: var(--space-sm);
  }
  
  .nav-item {
    padding: var(--space-xs) var(--space-md);
    font-size: var(--text-sm);
  }
  
  .grid {
    grid-template-columns: 1fr;
  }
  
  .calc-methods {
    grid-template-columns: 1fr;
  }
  
  .modal-content {
    padding: var(--space-lg);
    margin: var(--space-sm);
  }
  
  .dino-detail-grid {
    grid-template-columns: 1fr;
  }
  
  .test-item {
    flex-direction: column;
  }
  
  .summary {
    flex-direction: column;
    text-align: center;
  }
  
  .doc-content {
    padding: var(--space-lg);
  }
}

/* Print Styles */
@media print {
  .hero,
  .panel-nav,
  .actions,
  .btn,
  .theme-toggle,
  .toast {
    display: none !important;
  }
  
  .panel {
    display: block !important;
    page-break-inside: avoid;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .modal {
    position: relative;
    background: white;
  }
  
  .modal-content {
    box-shadow: none;
    border: 1px solid #ccc;
  }
}