/* 
 * Layered Facts — Styles
 * Framework by &multiply
 * License: CC BY-NC-SA 4.0
 */

/* ========================================
   CSS Variables
   ======================================== */

:root {
  /* Canvas */
  --color-canvas: #0a0a0a;
  --color-canvas-elevated: #1a1a1a;
  
  /* Timeline / Facts */
  --color-timeline: #ffffff;
  --color-layer-0: #ffffff;
  
  /* Layer colours */
  --color-layer-1: #a0a0a0;
  --color-layer-2: #d4a574;
  --color-layer-3: #7a8fa6;
  --color-layer-4: #a67a7a;
  --color-layer-5: #8ab4a0;
  --color-layer-6: #5a7a7a;
  --color-layer-7: #8a7a9a;
  
  /* Confidence */
  --opacity-high: 1;
  --opacity-medium: 0.7;
  --opacity-low: 0.5;
  
  /* Typography */
  --font-mono: 'IBM Plex Mono', monospace;
  --font-sans: 'IBM Plex Sans', sans-serif;
  
  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-xxl: 48px;
  
  /* Sizing */
  --bubble-size: 48px;
  --bubble-size-hover: 56px;
  --timeline-height: 160px;
  --sidebar-width: 180px;
  --header-height: 60px;
  
  /* Animation */
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 600ms;
  --easing-out: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ========================================
   Reset & Base
   ======================================== */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-timeline);
  background: var(--color-canvas);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   App Layout
   ======================================== */

.app {
  display: grid;
  grid-template-rows: var(--header-height) 1fr var(--timeline-height);
  height: 100vh;
  width: 100vw;
  overflow: hidden;
}

/* ========================================
   Header
   ======================================== */

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-xl);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  z-index: 100;
}

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

.search-label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.event-selector {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 500;
  color: var(--color-timeline);
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 4px;
  padding: var(--space-sm) var(--space-md);
  cursor: pointer;
  transition: border-color var(--duration-fast) var(--easing-out);
  min-width: 280px;
}

.event-selector:hover,
.event-selector:focus {
  border-color: rgba(255, 255, 255, 0.6);
  outline: none;
}

.event-selector option {
  background: var(--color-canvas);
  color: var(--color-timeline);
}

.event-title {
  font-family: var(--font-sans);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

/* ========================================
   Main Canvas
   ======================================== */

.canvas {
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: auto 1fr auto;
  position: relative;
  overflow: hidden;
}

/* ========================================
   Nav Arrows
   ======================================== */

.layer-labels,
.layer-labels-bottom {
  padding: var(--space-xs) var(--space-md);
  background: rgba(0, 0, 0, 0.3);
}

.layer-labels {
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.layer-labels-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* ========================================
   Layers Grid (Labels + Bubbles unified)
   ======================================== */

.layers-grid {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  grid-template-rows: repeat(7, 1fr);
  overflow: hidden;
  border-left: 1px solid rgba(255, 255, 255, 0.05);
}

.layer-label {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 0 var(--space-md);
  cursor: pointer;
  transition: opacity var(--duration-fast) var(--easing-out);
  justify-content: center;
  align-items: flex-start;
  border-right: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(0, 0, 0, 0.3);
}

.layer-label:hover {
  opacity: 1 !important;
  background: rgba(255, 255, 255, 0.03);
}

.nav-arrow {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 11px;
  color: rgba(255, 255, 255, 0.4);
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-xs) 0;
  transition: color var(--duration-fast) var(--easing-out);
}

.nav-arrow:hover {
  color: rgba(255, 255, 255, 0.8);
}

.nav-arrow span {
  text-transform: lowercase;
}

.layer-label .layer-number {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0.5;
}

.layer-label .layer-name {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.layer-label[data-layer="1"] { color: var(--color-layer-1); }
.layer-label[data-layer="2"] { color: var(--color-layer-2); }
.layer-label[data-layer="3"] { color: var(--color-layer-3); }
.layer-label[data-layer="4"] { color: var(--color-layer-4); }
.layer-label[data-layer="5"] { color: var(--color-layer-5); }
.layer-label[data-layer="6"] { color: var(--color-layer-6); }
.layer-label[data-layer="7"] { color: var(--color-layer-7); }

/* ========================================
   Layer Rows (Bubble containers)
   ======================================== */

.layer {
  position: relative;
  display: flex;
  align-items: center;
  padding: 0 var(--space-lg);
  overflow: visible;
}

.bubbles-row {
  display: flex;
  gap: var(--space-md);
  flex-wrap: nowrap;
  transition: all 0.5s var(--easing-out);
  width: 100%;
  position: relative;
  align-items: center;
  height: 100%;
}

/* Floating animation for unfiltered state */
.bubbles-row:not(.aligned) .bubble {
  animation: floatHorizontal 20s ease-in-out infinite;
}

.bubbles-row:not(.aligned) .bubble:nth-child(odd) {
  animation-delay: -10s;
}

.bubbles-row:not(.aligned) .bubble:nth-child(3n) {
  animation-duration: 25s;
}

@keyframes floatHorizontal {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(10px); }
  50% { transform: translateX(-5px); }
  75% { transform: translateX(15px); }
}

/* ========================================
   Bubbles
   ======================================== */

.bubble {
  position: relative;
  width: var(--bubble-size);
  height: var(--bubble-size);
  border-radius: 50%;
  background: var(--color-canvas-elevated);
  border: 2px solid currentColor;
  cursor: pointer;
  transition: 
    transform 0.5s var(--easing-out),
    opacity 0.3s var(--easing-out),
    box-shadow var(--duration-fast) var(--easing-out);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.bubble:hover {
  transform: scale(1.15);
  box-shadow: 0 0 20px currentColor;
}

.bubble.highlighted {
  box-shadow: 0 0 15px currentColor;
}

.bubble::after {
  content: attr(data-label);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 500;
  white-space: nowrap;
  color: currentColor;
  opacity: 0;
  transition: opacity var(--duration-fast) var(--easing-out);
  pointer-events: none;
  max-width: 150px;
  overflow: hidden;
  text-overflow: ellipsis;
}

.bubble:hover::after {
  opacity: 1;
}

.bubble[data-layer="1"] { color: var(--color-layer-1); }
.bubble[data-layer="2"] { color: var(--color-layer-2); }
.bubble[data-layer="3"] { color: var(--color-layer-3); }
.bubble[data-layer="4"] { color: var(--color-layer-4); }
.bubble[data-layer="5"] { color: var(--color-layer-5); }
.bubble[data-layer="6"] { color: var(--color-layer-6); }
.bubble[data-layer="7"] { color: var(--color-layer-7); }

.layer-content {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-sm) 0;
  flex-wrap: nowrap;
  transition: transform 0.5s var(--easing-out);
}

.bubble[data-confidence="medium"] {
  opacity: var(--opacity-medium);
}

.bubble[data-confidence="contested"],
.bubble[data-confidence="speculative"] {
  border-style: dashed;
  opacity: var(--opacity-medium);
}

.bubble-icon {
  font-size: 18px;
  opacity: 0.7;
}

/* Float animation */
@keyframes float {
  0%, 100% { transform: translateY(0) translateX(0); }
  25% { transform: translateY(-3px) translateX(2px); }
  50% { transform: translateY(0) translateX(3px); }
  75% { transform: translateY(3px) translateX(1px); }
}

.bubble:nth-child(odd) {
  animation-delay: -30s;
}

.bubble:nth-child(3n) {
  animation-duration: 45s;
}

/* ========================================
   Connection Lines
   ======================================== */

.connections-svg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.connection-line {
  fill: none;
  stroke-width: 1;
  opacity: 0.4;
  transition: opacity var(--duration-fast) var(--easing-out);
}

.connection-line[data-confidence="contested"] {
  stroke-dasharray: 4, 4;
}

.connection-line.highlighted {
  opacity: 0.8;
  stroke-width: 2;
}

/* ========================================
   Timeline (Layer 0)
   ======================================== */

.timeline {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  background: var(--color-canvas);
  min-height: 140px;
  flex-shrink: 0;
}

.timeline-label {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-md);
  border-right: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--color-layer-0);
}

.timeline-label .layer-number {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0.5;
}

.timeline-label .layer-name {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  font-weight: 500;
}

.timeline-track {
  position: relative;
  display: flex;
  align-items: flex-start;
  padding: var(--space-lg) var(--space-xl);
  padding-bottom: var(--space-xl);
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.3) transparent;
}

.timeline-track::-webkit-scrollbar {
  height: 6px;
}

.timeline-track::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.3);
  border-radius: 3px;
}

.timeline-bar {
  position: absolute;
  top: var(--space-lg);
  left: var(--space-xl);
  right: var(--space-xl);
  height: 3px;
  background: var(--color-timeline);
  transform: translateY(4px);
}

.timeline-nodes {
  display: flex;
  gap: var(--space-xxl);
  position: relative;
  z-index: 1;
}

.timeline-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  cursor: pointer;
  min-width: 140px;
  transition: transform var(--duration-fast) var(--easing-out);
}

.timeline-node:hover {
  transform: scale(1.05);
}

.timeline-node.active {
  transform: scale(1.1);
}

.node-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-timeline);
  border: 2px solid var(--color-canvas);
  box-shadow: 0 0 0 2px var(--color-timeline);
  transition: 
    transform var(--duration-fast) var(--easing-out),
    box-shadow var(--duration-fast) var(--easing-out);
  flex-shrink: 0;
}

.timeline-node:hover .node-dot,
.timeline-node.active .node-dot {
  transform: scale(1.3);
  box-shadow: 0 0 0 3px var(--color-timeline), 0 0 15px var(--color-timeline);
}

.node-date {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  color: var(--color-timeline);
  white-space: nowrap;
  margin-top: var(--space-xs);
}

.node-label {
  font-family: var(--font-sans);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.7);
  text-align: center;
  max-width: 140px;
  line-height: 1.4;
}

/* ========================================
   Detail Panel
   ======================================== */

.detail-panel-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: 
    opacity var(--duration-normal) var(--easing-out),
    visibility var(--duration-normal) var(--easing-out);
}

.detail-panel-overlay.open {
  opacity: 1;
  visibility: visible;
}

.detail-panel {
  position: relative;
  width: 90%;
  max-width: 480px;
  max-height: 80vh;
  background: var(--color-canvas-elevated);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  overflow: hidden;
  transform: translateY(20px);
  transition: transform var(--duration-normal) var(--easing-out);
}

.detail-panel-overlay.open .detail-panel {
  transform: translateY(0);
}

.detail-close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  width: 32px;
  height: 32px;
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  color: rgba(255, 255, 255, 0.6);
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: 
    border-color var(--duration-fast) var(--easing-out),
    color var(--duration-fast) var(--easing-out);
}

.detail-close:hover {
  border-color: rgba(255, 255, 255, 0.5);
  color: var(--color-timeline);
}

.detail-header {
  padding: var(--space-lg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.detail-layer-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: var(--space-xs) var(--space-sm);
  border-radius: 4px;
  margin-bottom: var(--space-sm);
}

.detail-layer-badge[data-layer="1"] { 
  color: var(--color-layer-1); 
  border: 1px solid var(--color-layer-1);
}
.detail-layer-badge[data-layer="2"] { 
  color: var(--color-layer-2); 
  border: 1px solid var(--color-layer-2);
}
.detail-layer-badge[data-layer="3"] { 
  color: var(--color-layer-3); 
  border: 1px solid var(--color-layer-3);
}
.detail-layer-badge[data-layer="4"] { 
  color: var(--color-layer-4); 
  border: 1px solid var(--color-layer-4);
}
.detail-layer-badge[data-layer="5"] { 
  color: var(--color-layer-5); 
  border: 1px solid var(--color-layer-5);
}
.detail-layer-badge[data-layer="6"] { 
  color: var(--color-layer-6); 
  border: 1px solid var(--color-layer-6);
}
.detail-layer-badge[data-layer="7"] { 
  color: var(--color-layer-7); 
  border: 1px solid var(--color-layer-7);
}

.detail-title {
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-timeline);
}

.detail-body {
  padding: var(--space-lg);
  overflow-y: auto;
  max-height: 50vh;
}

.detail-section {
  margin-bottom: var(--space-lg);
}

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

.detail-section-title {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: var(--space-sm);
}

.detail-section-content {
  font-size: 14px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.85);
}

.detail-contested {
  margin-top: var(--space-md);
  padding: var(--space-md);
  background: rgba(166, 122, 122, 0.1);
  border-left: 3px solid var(--color-layer-4);
  border-radius: 0 4px 4px 0;
}

.detail-contested-title {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-layer-4);
  margin-bottom: var(--space-xs);
}

.detail-framing-note {
  margin-top: var(--space-md);
  padding: var(--space-md);
  background: rgba(212, 165, 116, 0.1);
  border-left: 3px solid var(--color-layer-2);
  border-radius: 0 4px 4px 0;
  font-size: 13px;
  font-style: italic;
  color: var(--color-layer-2);
}

/* ========================================
   Context Sidebar (Layers 5-6)
   ======================================== */

.context-sidebar {
  position: fixed;
  top: 0;
  right: 0;
  width: 360px;
  height: 100vh;
  background: var(--color-canvas-elevated);
  border-left: 1px solid rgba(255, 255, 255, 0.1);
  transform: translateX(100%);
  transition: transform var(--duration-normal) var(--easing-out);
  z-index: 500;
  display: flex;
  flex-direction: column;
}

.context-sidebar.open {
  transform: translateX(0);
}

.context-close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  width: 32px;
  height: 32px;
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  color: rgba(255, 255, 255, 0.6);
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.context-title {
  padding: var(--space-lg);
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 600;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.context-body {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-lg);
}

.context-category {
  margin-bottom: var(--space-xl);
}

.context-category-title {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: var(--space-md);
}

.context-item {
  padding: var(--space-md);
  background: rgba(255, 255, 255, 0.03);
  border-radius: 4px;
  margin-bottom: var(--space-sm);
}

.context-item-description {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: var(--space-xs);
}

.context-item-relevance {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
  font-style: italic;
}

/* ========================================
   Reduced Motion
   ======================================== */

@media (prefers-reduced-motion: reduce) {
  .bubble {
    animation: none;
  }
  
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}

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

@media (max-width: 1024px) {
  :root {
    --sidebar-width: 140px;
  }
  
  .layer-label .layer-name {
    font-size: 10px;
  }
  
  .event-selector {
    min-width: 220px;
    font-size: 14px;
  }
}

@media (max-width: 768px) {
  .app {
    grid-template-rows: var(--header-height) 1fr 120px;
  }
  
  .canvas {
    grid-template-columns: 1fr;
  }
  
  .layer-labels {
    display: none;
  }
  
  .header {
    flex-direction: column;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    height: auto;
  }
  
  .event-title {
    font-size: 16px;
  }
  
  .event-selector {
    min-width: 100%;
  }
  
  .timeline-nodes {
    gap: var(--space-xl);
  }
  
  .timeline-node {
    min-width: 100px;
  }
  
  .context-sidebar {
    width: 100%;
  }
  
  .detail-panel {
    width: 95%;
    max-height: 90vh;
  }
}