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

:root {
  --cf-orange: #F38020;
  --cf-orange-light: #F5A623;
  --cf-orange-dark: #E55C00;
  --cf-gray-900: #1a1a1a;
  --cf-gray-800: #2d2d2d;
  --cf-gray-700: #404040;
  --cf-gray-600: #525252;
  --cf-gray-400: #9CA3AF;
  --cf-gray-300: #D1D5DB;
  --cf-gray-100: #F3F4F6;
  --cf-white: #FFFFFF;
  --participant-blue: #3B82F6;
  --participant-green: #10B981;
  --backbone-yellow: #F59E0B;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--cf-gray-900);
  color: var(--cf-gray-100);
  min-height: 100vh;
  overflow: hidden;
}

.container {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  background: rgba(0, 0, 0, 0.4);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  z-index: 100;
  flex-shrink: 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: var(--cf-orange);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-icon svg {
  width: 20px;
  height: 20px;
  fill: white;
}

.logo-text {
  font-size: 16px;
  font-weight: 600;
  color: var(--cf-white);
}

.logo-subtitle {
  font-size: 12px;
  color: var(--cf-gray-400);
  margin-left: 8px;
  padding-left: 8px;
  border-left: 1px solid var(--cf-gray-600);
}

.header-stats {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 13px;
}

.stat {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--cf-gray-400);
}

.stat-value {
  color: var(--cf-orange);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.main-content {
  flex: 1;
  display: flex;
  position: relative;
  overflow: hidden;
  min-height: 0;
}

#map-container {
  flex: 1;
  position: relative;
  background: #0a1628;
  overflow: hidden;
}

#map-svg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  cursor: grab;
}

#map-svg:active {
  cursor: grabbing;
}

.zoom-controls {
  position: absolute;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  z-index: 60;
}

.zoom-btn {
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.7);
  color: var(--cf-gray-100);
  font-size: 20px;
  font-weight: 300;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.zoom-btn:hover {
  background: rgba(243, 128, 32, 0.8);
}

.zoom-btn:active {
  transform: scale(0.95);
}

.zoom-info {
  text-align: center;
  font-size: 10px;
  color: var(--cf-gray-400);
  padding: 4px 0;
}

/* Map elements */
.land {
  fill: #1e3a5f;
  stroke: none;
}

.graticule {
  fill: none;
  stroke: rgba(255, 255, 255, 0.03);
  stroke-width: 0.5;
}

/* Datacenter markers */
.dc-marker {
  cursor: pointer;
}

.dc-dot {
  fill: var(--cf-orange);
}

.dc-marker:hover .dc-dot {
  r: 4;
}

.dc-ring {
  fill: none;
  stroke: var(--cf-orange);
  stroke-width: 0.5;
  opacity: 0.3;
}

/* Participant markers */
.participant-marker {
  cursor: pointer;
}

.participant-dot {
  fill: var(--participant-blue);
}

.participant-dot.speaker {
  fill: var(--participant-green);
}

/* Pulse animation only shown for small number of participants */
.participant-pulse {
  fill: none;
  stroke: var(--participant-blue);
  stroke-width: 1;
  opacity: 0;
}

.participant-pulse.speaker {
  stroke: var(--participant-green);
}

.participant-pulse.animated {
  animation: pulse 2s ease-out infinite;
}

@keyframes pulse {
  0% { r: 3; opacity: 0.8; }
  100% { r: 12; opacity: 0; }
}

/* Connection lines */
.connection-line {
  fill: none;
  stroke-linecap: round;
}

.user-dc-line {
  stroke: var(--cf-orange);
  stroke-width: 0.8;
  opacity: 0.7;
}

.dc-dc-line {
  stroke: var(--backbone-yellow);
  stroke-width: 1;
  stroke-dasharray: 4, 2;
  opacity: 0.6;
}

/* Animated dash only when few connections */
.dc-dc-line.animated {
  animation: dash 1s linear infinite;
}

@keyframes dash {
  to { stroke-dashoffset: -6; }
}

/* Click hint */
.click-hint {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  padding: 10px 20px;
  font-size: 12px;
  color: var(--cf-gray-300);
  pointer-events: none;
  transition: opacity 0.3s ease;
  z-index: 50;
}

.click-hint.hidden { opacity: 0; }
.click-hint span { color: var(--cf-orange); }

/* Sidebar */
.sidebar {
  width: 300px;
  background: rgba(0, 0, 0, 0.6);
  border-left: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
  z-index: 50;
  flex-shrink: 0;
  overflow-y: auto;
}

.sidebar-section {
  padding: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-section:last-child { border-bottom: none; }

.section-title {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--cf-orange);
  margin-bottom: 10px;
}

/* Mode toggle */
.mode-toggle {
  display: flex;
  background: var(--cf-gray-800);
  border-radius: 8px;
  padding: 4px;
  gap: 4px;
}

.mode-btn {
  flex: 1;
  padding: 8px 12px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--cf-gray-400);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.mode-btn:hover { color: var(--cf-gray-100); }
.mode-btn.active { background: var(--cf-orange); color: var(--cf-white); }

/* Controls */
.controls {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 14px;
  border: none;
  border-radius: 8px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-primary { background: var(--cf-orange); color: var(--cf-white); }
.btn-primary:hover { background: var(--cf-orange-light); }
.btn-secondary { background: var(--cf-gray-700); color: var(--cf-gray-100); }
.btn-secondary:hover { background: var(--cf-gray-600); }
.btn-danger { background: transparent; border: 1px solid rgba(239, 68, 68, 0.5); color: #EF4444; }
.btn-danger:hover { background: rgba(239, 68, 68, 0.1); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-row { display: flex; gap: 8px; }
.btn-row .btn { flex: 1; }

/* Legend */
.legend {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  color: var(--cf-gray-300);
}

.legend-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.legend-dot.datacenter { background: var(--cf-orange); box-shadow: 0 0 6px var(--cf-orange); }
.legend-dot.participant { background: var(--participant-blue); box-shadow: 0 0 6px var(--participant-blue); }
.legend-dot.speaker { background: var(--participant-green); box-shadow: 0 0 6px var(--participant-green); }

.legend-line { width: 20px; height: 2px; border-radius: 2px; }
.legend-line.user-dc { background: var(--cf-orange); }
.legend-line.dc-dc {
  background: repeating-linear-gradient(90deg, var(--backbone-yellow) 0, var(--backbone-yellow) 3px, transparent 3px, transparent 6px);
}

/* Info panel */
.info-panel {
  background: rgba(243, 128, 32, 0.1);
  border: 1px solid rgba(243, 128, 32, 0.3);
  border-radius: 8px;
  padding: 12px;
}

.info-panel p {
  font-size: 11px;
  line-height: 1.5;
  color: var(--cf-gray-300);
  margin-bottom: 6px;
}

.info-panel p:last-child { margin-bottom: 0; }
.info-panel strong { color: var(--cf-orange); }

/* Tooltip */
.tooltip {
  position: fixed;
  background: var(--cf-gray-800);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 11px;
  color: var(--cf-gray-100);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s ease;
  z-index: 1000;
  white-space: nowrap;
}

.tooltip.visible { opacity: 1; }
.tooltip-title { font-weight: 600; margin-bottom: 2px; }
.tooltip-subtitle { color: var(--cf-gray-400); font-size: 10px; }

/* Loading overlay */
.loading-overlay {
  position: absolute;
  inset: 0;
  background: var(--cf-gray-900);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  z-index: 200;
  transition: opacity 0.5s ease;
}

.loading-overlay.hidden { opacity: 0; pointer-events: none; }

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--cf-gray-700);
  border-top-color: var(--cf-orange);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }
.loading-text { color: var(--cf-gray-400); font-size: 14px; }

/* Hide sidebar toggle on desktop */
.sidebar-toggle {
  display: none;
}

/* Responsive - Mobile */
@media (max-width: 768px) {
  .main-content { 
    flex-direction: column; 
  }
  
  #map-container {
    /* Account for collapsed sidebar height */
    padding-bottom: 60px;
  }
  
  .sidebar { 
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    max-height: 60vh;
    flex-direction: column;
    border-left: none;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 16px 16px 0 0;
    transform: translateY(calc(100% - 60px));
    transition: transform 0.3s ease;
    z-index: 100;
    background: rgba(0, 0, 0, 0.92);
  }
  
  .sidebar.expanded {
    transform: translateY(0);
    overflow-y: auto;
  }
  
  .sidebar-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px 8px;
    cursor: pointer;
  }
  
  .sidebar-toggle-handle {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
  }
  
  .sidebar-toggle-handle span {
    display: block;
    width: 28px;
    height: 3px;
    background: var(--cf-gray-400);
    border-radius: 2px;
    transition: background 0.2s ease;
  }
  
  .sidebar-toggle:hover .sidebar-toggle-handle span,
  .sidebar-toggle:active .sidebar-toggle-handle span {
    background: var(--cf-gray-300);
  }
  
  .sidebar-section { 
    padding: 12px 16px;
  }
  
  /* Hide legend and info panel on mobile by default - show in expanded */
  /* nth-child(n+5) because: toggle, mode, controls, legend, info */
  .sidebar:not(.expanded) .sidebar-section:nth-child(n+4) {
    display: none;
  }
  
  /* Compact mode toggle on mobile */
  .mode-toggle {
    padding: 2px;
  }
  
  .mode-btn {
    padding: 6px 10px;
    font-size: 11px;
  }
  
  /* Compact buttons on mobile */
  .controls {
    flex-direction: row;
    gap: 8px;
  }
  
  .btn {
    padding: 8px 12px;
    font-size: 11px;
    flex: 1;
  }
  
  .btn svg {
    display: none;
  }
  
  /* Adjust zoom controls position for mobile */
  .zoom-controls {
    bottom: 80px;
    right: 12px;
  }
  
  .zoom-btn {
    width: 32px;
    height: 32px;
    font-size: 18px;
  }
  
  /* Adjust click hint for mobile */
  .click-hint {
    bottom: 80px;
    font-size: 11px;
    padding: 8px 16px;
  }
  
  .header-stats { 
    display: none; 
  }
  
  /* Smaller header on mobile */
  header {
    padding: 8px 16px;
  }
  
  .logo-subtitle {
    display: none;
  }
  
  .logo-text {
    font-size: 14px;
  }
  
  .logo-icon {
    width: 28px;
    height: 28px;
  }
  
  .logo-icon svg {
    width: 16px;
    height: 16px;
  }
  
  /* Legend compact on mobile */
  .legend {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 8px 16px;
  }
  
  .legend-item {
    font-size: 10px;
    gap: 6px;
  }
  
  .legend-icon {
    width: 16px;
    height: 16px;
  }
  
  .legend-dot {
    width: 8px;
    height: 8px;
  }
  
  .legend-line {
    width: 16px;
  }
  
  /* Info panel compact on mobile */
  .info-panel {
    padding: 10px;
  }
  
  .info-panel p {
    font-size: 10px;
    margin-bottom: 4px;
  }
  
  .section-title {
    font-size: 9px;
    margin-bottom: 8px;
  }
}