/**
 * Component styles for the AI Explainer
 */

/* ============================================
   App Shell
   ============================================ */

.app-shell {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border-subtle);
  padding: var(--space-sm) var(--page-padding);
}

.app-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  max-width: var(--content-width-wide);
  margin-inline: auto;
}

.app-header__inner .app-nav {
  margin-left: auto;
}

.app-logo {
  font-family: var(--font-heading);
  font-size: var(--font-size-md);
  font-weight: 600;
  color: var(--color-text-heading);
  text-decoration: none;
}

.app-main {
  flex: 1;
  padding: var(--space-xl) var(--page-padding);
}

.app-footer {
  padding: var(--space-lg) var(--page-padding);
  border-top: 1px solid var(--color-border-subtle);
  background: var(--color-bg-subtle);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* ============================================
   Content Node
   ============================================ */

.content-node {
  max-width: var(--content-width);
  margin-inline: auto;
}

.content-node__header {
  margin-bottom: var(--space-lg);
}

.content-node__title {
  margin-bottom: var(--space-sm);
}

.content-node__summary {
  font-size: var(--font-size-md);
  color: var(--color-text-muted);
  font-style: italic;
}

.content-node__body {
  line-height: var(--line-height-relaxed);
}

.content-node__body > * + * {
  margin-top: var(--space-md);
}

/* Enable margin positioning on content node body */
.content-node__body {
  position: relative;
}

/* ============================================
   Theme Toggle
   ============================================ */

.app-nav {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.app-nav__link {
  font-family: var(--font-ui);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-2xs) var(--space-sm);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-out);
}

.app-nav__link:hover {
  color: var(--color-accent);
  background: var(--color-accent-subtle);
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  color: var(--color-text-muted);
  transition: all var(--duration-fast) var(--ease-out);
}

.theme-toggle:hover {
  background: var(--color-bg-subtle);
  color: var(--color-text);
}

/* ============================================
   Responsive Adjustments
   ============================================ */

@media (min-width: 768px) {
  .nav-links {
    flex-direction: row;
    gap: var(--space-xl);
  }
  
  .nav-links__section {
    flex: 1;
  }
}

/* ============================================
   Diagram Components
   ============================================ */

.diagram-container {
  width: 100%;
  margin-block: var(--space-lg);
  padding: var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.diagram-title {
  font-family: var(--font-ui);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
  text-align: center;
  margin-bottom: var(--space-md);
}

/* Scale Comparison */
.scale-comparison__chart {
  position: relative;
}

.scale-comparison__row {
  display: flex;
  align-items: center;
  margin-bottom: var(--space-sm);
}

.scale-comparison__label {
  width: 120px;
  flex-shrink: 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-align: right;
  padding-right: var(--space-sm);
}

.scale-comparison__bar-container {
  flex: 1;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.scale-comparison__bar {
  height: 24px;
  border-radius: var(--radius-sm);
  transition: width var(--duration-normal) var(--ease-out);
}

.scale-comparison__value {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  white-space: nowrap;
}

.scale-comparison__unit {
  text-align: center;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-sm);
}

/* Bar Chart */
.bar-chart__chart {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.bar-chart--horizontal .bar-chart__row {
  display: flex;
  align-items: center;
}

.bar-chart--horizontal .bar-chart__label {
  width: 100px;
  flex-shrink: 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-align: right;
  padding-right: var(--space-sm);
}

.bar-chart--horizontal .bar-chart__bar-container {
  flex: 1;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.bar-chart--horizontal .bar-chart__bar {
  height: 24px;
  border-radius: var(--radius-sm);
  transition: width var(--duration-normal) var(--ease-out);
}

.bar-chart--horizontal .bar-chart__value {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.bar-chart--vertical .bar-chart__chart--vertical {
  display: flex;
  align-items: flex-end;
  justify-content: space-around;
  height: 200px;
  padding-top: var(--space-md);
}

.bar-chart--vertical .bar-chart__column {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 1;
}

.bar-chart--vertical .bar-chart__bar-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  height: 180px;
  justify-content: flex-end;
}

.bar-chart--vertical .bar-chart__bar {
  width: 40px;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  transition: height var(--duration-normal) var(--ease-out);
}

.bar-chart--vertical .bar-chart__value {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2xs);
}

.bar-chart--vertical .bar-chart__label {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  text-align: center;
  margin-top: var(--space-xs);
}

/* Network Graph */
.network-graph__svg {
  width: 100%;
  height: auto;
  max-height: 400px;
}

.network-graph__legend {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  margin-top: var(--space-md);
  flex-wrap: wrap;
}

.network-graph__legend-item {
  display: flex;
  align-items: center;
  gap: var(--space-2xs);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.network-graph__legend-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

/* Layer Stack */
.layer-stack__layers {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2xs);
}

.layer-stack__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
}

.layer-stack__layer {
  width: 80%;
  max-width: 300px;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-align: center;
  transition: all var(--duration-fast) var(--ease-out);
}

.layer-stack__layer--highlight {
  border-color: var(--color-accent);
  border-width: 2px;
}

.layer-stack__label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text);
}

.layer-stack__sublabel {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-3xs);
}

.layer-stack__arrow {
  font-size: 1.2em;
  color: var(--color-text-muted);
  padding: var(--space-3xs) 0;
}

/* Flow Diagram */
.flow-diagram__steps--horizontal {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2xs);
  flex-wrap: wrap;
}

.flow-diagram__steps--vertical {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2xs);
}

.flow-diagram__item {
  display: flex;
  align-items: center;
}

.flow-diagram--vertical .flow-diagram__item {
  flex-direction: column;
}

.flow-diagram__step {
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-align: center;
  min-width: 80px;
  transition: all var(--duration-fast) var(--ease-out);
}

.flow-diagram__step--highlight {
  border-color: var(--color-accent);
  border-width: 2px;
}

.flow-diagram__number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  background: var(--color-accent);
  color: white;
  border-radius: 50%;
  font-size: var(--font-size-xs);
  font-weight: 600;
  margin-bottom: var(--space-2xs);
}

.flow-diagram__icon {
  display: block;
  font-size: 1.5em;
  margin-bottom: var(--space-2xs);
}

.flow-diagram__label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text);
}

.flow-diagram__sublabel {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-3xs);
}

.flow-diagram__arrow {
  font-size: 1.2em;
  color: var(--color-text-muted);
  padding: 0 var(--space-xs);
}

.flow-diagram--vertical .flow-diagram__arrow {
  padding: var(--space-3xs) 0;
}

.diagram-annotation {
  fill: var(--color-text-muted);
}

/* Token Boundaries */
.token-boundaries {
  margin-block: var(--space-lg);
  padding: var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.token-boundaries__title {
  font-family: var(--font-ui);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.token-boundaries__original {
  margin-bottom: var(--space-md);
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
}

.token-boundaries__original-label {
  color: var(--color-text-muted);
  margin-right: var(--space-xs);
}

.token-boundaries__original-text {
  background: var(--color-bg-subtle);
  padding: var(--space-3xs) var(--space-xs);
  border-radius: var(--radius-sm);
}

.token-boundaries__container {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  font-family: var(--font-mono);
  font-size: var(--font-size-base);
  line-height: 1.6;
}

.token-boundaries__token {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-3xs) var(--space-2xs);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  transition: transform var(--duration-fast) var(--ease-out);
}

.token-boundaries__token:hover {
  transform: translateY(-2px);
}

.token-boundaries__token--highlight {
  border-color: var(--color-accent);
  border-width: 2px;
}

.token-boundaries__text {
  white-space: pre;
}

.token-boundaries__id {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-3xs);
}

.token-boundaries__count {
  margin-top: var(--space-sm);
  font-family: var(--font-ui);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  text-align: right;
}

/* Token color palette for dark mode */
[data-theme="dark"] .token-boundaries__token {
  --token-color-1: rgba(56, 189, 248, 0.15);
  --token-color-2: rgba(251, 191, 36, 0.15);
  --token-color-3: rgba(167, 139, 250, 0.15);
  --token-color-4: rgba(52, 211, 153, 0.15);
  --token-color-5: rgba(251, 113, 133, 0.15);
  --token-color-6: rgba(129, 140, 248, 0.15);
}

/* Diagram placeholder for planned toys */
.diagram-placeholder {
  margin-block: var(--space-lg);
  padding: var(--space-lg);
  background: var(--color-surface);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
}

.diagram-placeholder__icon {
  font-size: 2rem;
  margin-bottom: var(--space-sm);
  opacity: 0.6;
}

.diagram-placeholder__title {
  font-family: var(--font-ui);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2xs);
}

.diagram-placeholder__description {
  font-size: var(--font-size-sm);
  color: var(--color-text-subtle);
}

/* ============================================
   Footer Navigation
   ============================================ */

.footer-nav {
  margin-top: var(--space-sm);
  display: flex;
  gap: var(--space-xs);
  align-items: center;
  flex-wrap: wrap;
}

.footer-nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color 0.15s ease;
}

.footer-nav a:hover {
  color: var(--color-primary);
}

.footer-separator {
  color: var(--color-border);
}

/* ============================================
   Discovery Animation
   ============================================ */

.discoverable-link {
  display: inline;
}

.discoverable-link--discovered {
  animation: link-discovered 1s ease;
}

@keyframes link-discovered {
  0% {
    text-shadow: 0 0 0 transparent;
  }
  30% {
    text-shadow: 0 0 10px var(--color-warning), 0 0 20px var(--color-warning);
  }
  100% {
    text-shadow: 0 0 0 transparent;
  }
}