/* ============================================
   PC MUSIC NETWORK - STYLES
   Futuristic Hyperpop Aesthetic
   Mobile-First Responsive Design
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* ============================================
   CSS VARIABLES
   ============================================ */
:root {
  /* Brand Colors */
  --pc-user: #7300FF;
  --pc-person: #0066FF;
  --pc-group: #FF6B35;
  --pc-label: #FF2D92;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-accent: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  
  /* Dark Theme (Default) */
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-tertiary: #1a1a2e;
  --bg-glass: rgba(18, 18, 26, 0.9);
  --bg-glass-light: rgba(255, 255, 255, 0.05);
  
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.7);
  --text-tertiary: rgba(255, 255, 255, 0.4);
  
  --border-color: rgba(255, 255, 255, 0.1);
  --border-glow: rgba(255, 255, 255, 0.2);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 64px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(102, 126, 234, 0.3);
  
  /* Sizing */
  --header-height: 60px;
  --sidebar-width: 240px;
  --panel-width: 380px;
  --panel-width-expanded: 520px;
  --mobile-bar-height: 64px;
  --border-radius: 16px;
  --border-radius-sm: 10px;
  --border-radius-lg: 24px;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 400ms cubic-bezier(0.16, 1, 0.3, 1);
  
  /* Z-Index Scale */
  --z-graph: 1;
  --z-sidebar: 50;
  --z-panel: 100;
  --z-mobile-bar: 150;
  --z-modal: 200;
  --z-tooltip: 300;
  --z-loading: 500;
  
  /* Safe Areas */
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
}

/* Light Theme */
[data-theme="light"] {
  --bg-primary: #f8f9fc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #eef0f5;
  --bg-glass: rgba(255, 255, 255, 0.95);
  --bg-glass-light: rgba(0, 0, 0, 0.03);
  
  --text-primary: #1a1a2e;
  --text-secondary: rgba(26, 26, 46, 0.7);
  --text-tertiary: rgba(26, 26, 46, 0.4);
  
  --border-color: rgba(0, 0, 0, 0.08);
  --border-glow: rgba(0, 0, 0, 0.12);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 16px 64px rgba(0, 0, 0, 0.16);
  --shadow-glow: 0 0 40px rgba(102, 126, 234, 0.15);
}

/* ============================================
   RESET & BASE
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  touch-action: none;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  user-select: none;
}

/* ============================================
   LOADING SCREEN
   ============================================ */
.loading-screen {
  position: fixed;
  inset: 0;
  z-index: var(--z-loading);
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

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

.loading-content {
  text-align: center;
}

.loading-logo {
  position: relative;
  width: 120px;
  height: 120px;
  margin: 0 auto 24px;
}

.loading-svg {
  width: 100%;
  height: 100%;
  animation: rotate 3s linear infinite;
}

.loading-ring {
  fill: none;
  stroke: var(--pc-label);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-dasharray: 150 100;
  animation: dash 2s ease-in-out infinite;
}

.loading-ring.delay-1 { stroke: var(--pc-person); animation-delay: -0.5s; }
.loading-ring.delay-2 { stroke: var(--pc-user); animation-delay: -1s; }

.loading-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 28px;
  font-weight: 700;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.loading-status {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.loading-bar {
  width: 200px;
  height: 3px;
  background: var(--bg-tertiary);
  border-radius: 3px;
  overflow: hidden;
  margin: 0 auto;
}

.loading-progress {
  height: 100%;
  background: var(--gradient-accent);
  animation: loading 2s ease-in-out infinite;
}

@keyframes rotate { 100% { transform: rotate(360deg); } }
@keyframes dash { 0% { stroke-dashoffset: 0; } 50% { stroke-dashoffset: 100; } 100% { stroke-dashoffset: 250; } }
@keyframes loading { 0% { width: 0; margin-left: 0; } 50% { width: 100%; margin-left: 0; } 100% { width: 0; margin-left: 100%; } }

/* ============================================
   AMBIENT BACKGROUND
   ============================================ */
.ambient-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.gradient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.3;
  animation: float 20s ease-in-out infinite;
}

.orb-1 { width: 400px; height: 400px; background: var(--pc-label); top: -100px; right: -100px; }
.orb-2 { width: 300px; height: 300px; background: var(--pc-person); bottom: -50px; left: -50px; animation-delay: -7s; }
.orb-3 { width: 250px; height: 250px; background: var(--pc-user); top: 50%; left: 50%; transform: translate(-50%, -50%); animation-delay: -14s; }

[data-theme="light"] .gradient-orb { opacity: 0.12; }

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 50px 50px;
}

[data-theme="light"] .grid-overlay {
  background-image: 
    linear-gradient(rgba(0,0,0,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,0.03) 1px, transparent 1px);
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(30px, -30px) scale(1.1); }
  50% { transform: translate(-20px, 20px) scale(0.9); }
  75% { transform: translate(40px, 10px) scale(1.05); }
}

/* ============================================
   HEADER
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: var(--z-sidebar);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  padding-top: var(--safe-top);
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
}

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

.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  color: white;
  flex-shrink: 0;
}

.brand-text { display: none; }

.brand-title {
  font-size: 18px;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.brand-subtitle {
  font-size: 11px;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.header-stats {
  display: none;
  align-items: center;
  gap: 16px;
  padding: 8px 16px;
  background: var(--bg-glass-light);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.stat-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 16px;
  font-weight: 600;
}

.stat-label {
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-tertiary);
}

.stat-divider {
  width: 1px;
  height: 24px;
  background: var(--border-color);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.header-button {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  background: var(--bg-glass-light);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-base);
}

.header-button:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-glow);
}

.header-button:active { transform: scale(0.95); }

.header-button svg { width: 20px; height: 20px; }

a.header-button { text-decoration: none; }
a.header-button:hover { background: var(--pc-label); color: white; border-color: transparent; }

.icon-moon { display: none; }
[data-theme="light"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: block; }

/* ============================================
   LEFT SIDEBAR
   ============================================ */
.left-sidebar {
  position: fixed;
  top: calc(var(--header-height) + var(--safe-top));
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  z-index: var(--z-sidebar);
  padding: 16px;
  padding-left: calc(16px + var(--safe-left));
  padding-bottom: calc(16px + var(--safe-bottom));
  display: none;
  flex-direction: column;
  gap: 16px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border-color) transparent;
}

.left-sidebar::-webkit-scrollbar { width: 4px; }
.left-sidebar::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 2px; }

.sidebar-section {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 12px;
}

.section-label {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-tertiary);
  margin-bottom: 10px;
}

.section-header-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  margin-bottom: 10px;
}

.section-header-toggle .section-label { margin-bottom: 0; }

.toggle-icon {
  width: 14px;
  height: 14px;
  color: var(--text-tertiary);
  transition: transform var(--transition-base);
}

.section-header-toggle[aria-expanded="false"] .toggle-icon {
  transform: rotate(180deg);
}

/* Search */
.search-section { position: relative; }

.search-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 12px;
  width: 16px;
  height: 16px;
  color: var(--text-tertiary);
  pointer-events: none;
}

.search-input {
  width: 100%;
  height: 40px;
  padding: 0 36px;
  font-family: inherit;
  font-size: 13px;
  color: var(--text-primary);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  outline: none;
  transition: var(--transition-base);
}

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

.search-input:focus {
  border-color: var(--pc-person);
  box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.2);
}

.search-clear {
  position: absolute;
  right: 6px;
  width: 28px;
  height: 28px;
  border: none;
  background: transparent;
  color: var(--text-tertiary);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-fast);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.search-clear svg { width: 14px; height: 14px; }
.search-clear.visible { opacity: 1; visibility: visible; }
.search-clear:hover { background: var(--bg-glass-light); color: var(--text-primary); }

.search-results {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  max-height: 240px;
  overflow-y: auto;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: var(--transition-base);
  z-index: 10;
}

.search-results.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.search-result-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  cursor: pointer;
  transition: var(--transition-fast);
  border-bottom: 1px solid var(--border-color);
}

.search-result-item:last-child { border-bottom: none; }
.search-result-item:hover { background: var(--bg-glass-light); }

.search-result-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border-color);
}

.search-result-info { flex: 1; min-width: 0; }

.search-result-name {
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.search-result-type {
  font-size: 10px;
  color: var(--text-tertiary);
  text-transform: uppercase;
}

/* Filters */
.filter-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px;
}

.filter-chip {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 10px;
  font-family: inherit;
  font-size: 11px;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: var(--transition-base);
}

.filter-chip:hover { border-color: var(--border-glow); }
.filter-chip:active { transform: scale(0.97); }

.filter-chip.active {
  background: var(--text-primary);
  color: var(--bg-primary);
  border-color: transparent;
}

.chip-icon { font-size: 8px; }

.chip-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--dot-color);
}

/* Controls */
.controls-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px;
}

.control-button {
  height: 40px;
  border: 1px solid var(--border-color);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-base);
}

.control-button svg { width: 18px; height: 18px; }
.control-button:hover { background: var(--pc-person); color: white; }
.control-button:active { transform: scale(0.95); }

/* Minimap */
.minimap {
  position: relative;
  width: 100%;
  aspect-ratio: 4/3;
  background: var(--bg-tertiary);
  border-radius: var(--border-radius-sm);
  overflow: hidden;
}

.minimap canvas { width: 100%; height: 100%; }

.minimap-viewport {
  position: absolute;
  border: 2px solid var(--pc-person);
  border-radius: 2px;
  background: rgba(0, 102, 255, 0.15);
  pointer-events: none;
}

/* Legend */
.legend-items {
  display: flex;
  flex-direction: column;
  gap: 8px;
  overflow: hidden;
  transition: var(--transition-base);
}

.legend-items.collapsed {
  height: 0;
  opacity: 0;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 10px;
}

.legend-node {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--node-color);
  box-shadow: 0 0 8px var(--node-color);
}

.legend-label {
  font-size: 12px;
  color: var(--text-secondary);
}

/* ============================================
   MOBILE BOTTOM BAR
   ============================================ */
.mobile-bottom-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--mobile-bar-height);
  padding-bottom: var(--safe-bottom);
  z-index: var(--z-mobile-bar);
  display: flex;
  align-items: stretch;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--border-color);
}

.mobile-tab {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  background: none;
  border: none;
  color: var(--text-tertiary);
  cursor: pointer;
  transition: var(--transition-base);
}

.mobile-tab svg { width: 22px; height: 22px; }
.mobile-tab span { font-size: 10px; font-weight: 500; }

.mobile-tab.active { color: var(--pc-person); }
.mobile-tab:active { transform: scale(0.95); }

/* Mobile Tools Panel */
.mobile-tools-panel {
  position: fixed;
  left: 0;
  right: 0;
  bottom: var(--mobile-bar-height);
  max-height: 50vh;
  z-index: var(--z-panel);
  background: var(--bg-secondary);
  border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
  box-shadow: var(--shadow-lg);
  transform: translateY(100%);
  transition: transform var(--transition-smooth);
}

.mobile-tools-panel.active { transform: translateY(0); }

.mobile-panel-header {
  position: relative;
  padding: 12px 16px;
  display: flex;
  justify-content: center;
  border-bottom: 1px solid var(--border-color);
}

.handle-bar {
  width: 40px;
  height: 4px;
  background: var(--text-tertiary);
  border-radius: 2px;
}

.mobile-panel-close {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  border: none;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mobile-panel-close svg { width: 16px; height: 16px; }

.mobile-panel-content {
  padding: 16px;
  overflow-y: auto;
  max-height: calc(50vh - 60px);
}

/* ============================================
   GRAPH CONTAINER
   ============================================ */
.graph-container {
  position: fixed;
  top: calc(var(--header-height) + var(--safe-top));
  left: 0;
  right: 0;
  bottom: calc(var(--mobile-bar-height) + var(--safe-bottom));
  z-index: var(--z-graph);
  transition: var(--transition-smooth);
}

.graph-container svg {
  width: 100%;
  height: 100%;
  display: block;
}

/* ============================================
   SVG NODE STYLES
   ============================================ */
.node {
  cursor: pointer;
  transition: opacity var(--transition-base);
}

.node:hover { filter: brightness(1.1); }

.node-ring {
  fill: none;
  stroke-width: 3;
  stroke-dasharray: 8 4;
  opacity: 0;
  filter: drop-shadow(0 0 8px currentColor);
  animation: ring-rotate 4s linear infinite;
  transition: opacity var(--transition-base);
}

.node-ring.active { opacity: 1; }

@keyframes ring-rotate { 100% { stroke-dashoffset: -24; } }

.node-glow {
  opacity: 0;
  transition: opacity var(--transition-base);
}

.node:hover .node-glow { opacity: 0.5; }

.node-label {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 10px;
  font-weight: 500;
  fill: var(--text-primary);
  text-anchor: middle;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.link {
  stroke: var(--text-tertiary);
  stroke-opacity: 0.12;
  transition: stroke-opacity var(--transition-base);
}

.link.highlight {
  stroke-opacity: 0.6;
  stroke: var(--pc-person);
}

/* ============================================
   INFO PANEL TOGGLE
   ============================================ */
.info-panel-toggle {
  position: fixed;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  z-index: var(--z-panel);
  display: none;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  color: var(--text-primary);
  cursor: pointer;
  transition: var(--transition-base);
  box-shadow: var(--shadow-md);
}

.info-panel-toggle:not([hidden]) { display: flex; }
.info-panel-toggle:hover { background: var(--bg-tertiary); }
.info-panel-toggle svg { width: 18px; height: 18px; }
.toggle-label { font-size: 13px; font-weight: 500; }

/* ============================================
   INFO PANEL (Desktop)
   ============================================ */
.info-panel {
  position: fixed;
  top: calc(var(--header-height) + var(--safe-top));
  right: 0;
  bottom: 0;
  width: var(--panel-width);
  z-index: var(--z-panel);
  background: var(--bg-glass);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  border-left: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  transform: translateX(100%);
  transition: transform var(--transition-smooth), width var(--transition-smooth);
  display: none;
  flex-direction: column;
}

.info-panel.active { transform: translateX(0); }

.info-panel.expanded {
  width: var(--panel-width-expanded);
}

.panel-controls {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 10;
  display: flex;
  gap: 8px;
}

.panel-control-btn {
  width: 36px;
  height: 36px;
  border: 1px solid var(--border-color);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-base);
}

.panel-control-btn svg { width: 16px; height: 16px; }
.panel-control-btn:hover { background: var(--bg-glass-light); color: var(--text-primary); }
.panel-close-btn:hover { background: var(--pc-label); color: white; }

.info-panel.expanded #panel-expand svg {
  transform: rotate(180deg);
}

.panel-content {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: thin;
  scrollbar-color: var(--border-color) transparent;
}

.panel-content::-webkit-scrollbar { width: 6px; }
.panel-content::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }

/* ============================================
   INFO PANEL CONTENT
   ============================================ */
/* Cover Image */
.info-cover {
  position: relative;
  width: 100%;
  height: 180px;
  overflow: hidden;
}

.info-cover-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.info-cover-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, var(--bg-glass) 0%, transparent 60%);
}

/* Avatar */
.info-avatar-wrapper {
  position: relative;
  display: flex;
  justify-content: center;
  margin-top: -50px;
  padding: 0 20px;
}

.info-avatar {
  position: relative;
  width: 100px;
  height: 100px;
}

.info-avatar-img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--bg-secondary);
  box-shadow: var(--shadow-lg);
}

.info-avatar-ring {
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  border: 2px solid;
  opacity: 0.5;
  animation: avatar-pulse 2s ease-in-out infinite;
}

@keyframes avatar-pulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.05); opacity: 0.2; }
}

/* Info Header */
.info-header {
  text-align: center;
  padding: 16px 20px;
}

.info-type-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: white;
  border-radius: 100px;
  margin-bottom: 8px;
}

.info-type-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: white;
}

.info-name {
  font-size: 24px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.5px;
}

.info-description {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-secondary);
  padding: 0 20px;
  text-align: center;
}

/* Social Links */
.social-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  padding: 20px;
  border-bottom: 1px solid var(--border-color);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-base);
}

.social-link svg { width: 20px; height: 20px; }

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

.social-link.spotify:hover { background: #1DB954; color: white; border-color: transparent; }
.social-link.apple:hover { background: #fc3c44; color: white; border-color: transparent; }
.social-link.bandcamp:hover { background: #629aa9; color: white; border-color: transparent; }
.social-link.soundcloud:hover { background: #ff5500; color: white; border-color: transparent; }
.social-link.instagram:hover { background: linear-gradient(45deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888); color: white; border-color: transparent; }
.social-link.twitter:hover { background: #1DA1F2; color: white; border-color: transparent; }
.social-link.website:hover { background: var(--pc-person); color: white; border-color: transparent; }

.social-link.disabled {
  opacity: 0.3;
  pointer-events: none;
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  padding: 20px;
}

.stat-card {
  background: var(--bg-glass-light);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  padding: 14px;
  text-align: center;
  transition: var(--transition-base);
}

.stat-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-2px);
}

.stat-card-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 22px;
  font-weight: 600;
  line-height: 1;
}

.stat-card-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-tertiary);
  margin-top: 6px;
}

/* Connections Section */
.connections-section {
  padding: 20px;
  border-top: 1px solid var(--border-color);
}

.connections-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.connections-title {
  font-size: 13px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.connections-title svg { width: 16px; height: 16px; color: var(--text-tertiary); }

.connections-count {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-tertiary);
  background: var(--bg-tertiary);
  padding: 2px 8px;
  border-radius: 100px;
}

.connections-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.connection-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  background: var(--bg-glass-light);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: var(--transition-base);
}

.connection-card:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-glow);
  transform: translateX(4px);
}

.connection-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--connection-color, var(--border-color));
}

.connection-info { flex: 1; min-width: 0; }

.connection-name {
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.connection-type {
  font-size: 10px;
  color: var(--text-tertiary);
  text-transform: capitalize;
}

.connection-arrow {
  width: 18px;
  height: 18px;
  color: var(--text-tertiary);
  transition: var(--transition-fast);
}

.connection-card:hover .connection-arrow {
  color: var(--text-primary);
  transform: translateX(4px);
}

/* ============================================
   MOBILE INFO PANEL (Bottom Sheet)
   ============================================ */
.mobile-info-panel {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  max-height: 85vh;
  z-index: var(--z-modal);
  background: var(--bg-secondary);
  border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
  box-shadow: var(--shadow-lg);
  transform: translateY(100%);
  transition: transform var(--transition-smooth), max-height var(--transition-smooth);
  display: flex;
  flex-direction: column;
}

.mobile-info-panel.active { transform: translateY(0); }

.mobile-info-panel.expanded { max-height: 95vh; }

.sheet-header {
  position: relative;
  padding: 12px 16px;
  display: flex;
  justify-content: center;
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}

.sheet-controls {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  gap: 8px;
}

.sheet-control-btn {
  width: 32px;
  height: 32px;
  border: none;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sheet-control-btn svg { width: 16px; height: 16px; }

.sheet-content {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

/* ============================================
   TOOLTIP
   ============================================ */
.tooltip {
  position: fixed;
  z-index: var(--z-tooltip);
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.tooltip.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.tooltip-content {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 14px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  box-shadow: var(--shadow-lg);
}

.tooltip-name { font-size: 13px; font-weight: 600; }
.tooltip-type { font-size: 10px; text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-tertiary); }

/* ============================================
   MODAL
   ============================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-base);
}

.modal-overlay.visible { opacity: 1; visibility: visible; }

.modal-content {
  width: 100%;
  max-width: 420px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  transform: scale(0.95);
  transition: transform var(--transition-base);
}

.modal-overlay.visible .modal-content { transform: scale(1); }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
}

.modal-header h2 { font-size: 16px; font-weight: 600; }

.modal-close {
  width: 32px;
  height: 32px;
  border: none;
  background: transparent;
  color: var(--text-tertiary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  transition: var(--transition-fast);
}

.modal-close svg { width: 18px; height: 18px; }
.modal-close:hover { background: var(--bg-glass-light); color: var(--text-primary); }

.shortcuts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  padding: 20px;
}

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

.shortcut-item kbd {
  min-width: 32px;
  padding: 4px 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 500;
  color: var(--text-primary);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  text-align: center;
}

.shortcut-item span { font-size: 12px; color: var(--text-secondary); }

/* ============================================
   TOAST NOTIFICATIONS
   ============================================ */
.toast-container {
  position: fixed;
  bottom: calc(var(--mobile-bar-height) + 16px + var(--safe-bottom));
  left: 50%;
  transform: translateX(-50%);
  z-index: var(--z-modal);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  pointer-events: auto;
  animation: toast-in 0.3s ease forwards;
}

.toast.hiding { animation: toast-out 0.3s ease forwards; }

@keyframes toast-in { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes toast-out { from { opacity: 1; transform: translateY(0); } to { opacity: 0; transform: translateY(20px); } }

.toast-icon { width: 18px; height: 18px; flex-shrink: 0; }
.toast-icon.success { color: #22c55e; }
.toast-icon.error { color: #ef4444; }
.toast-icon.info { color: var(--pc-person); }

.toast-message { font-size: 13px; }

/* ============================================
   RESPONSIVE - TABLET (768px+)
   ============================================ */
@media (min-width: 768px) {
  .brand-text { display: block; }
  .header-stats { display: flex; }
  
  .left-sidebar { display: flex; }
  
  .mobile-bottom-bar,
  .mobile-tools-panel,
  .mobile-info-panel { display: none !important; }
  
  .graph-container {
    left: var(--sidebar-width);
    bottom: 0;
  }
  
  .graph-container.panel-open {
    right: var(--panel-width);
  }
  
  .graph-container.panel-expanded {
    right: var(--panel-width-expanded);
  }
  
  .info-panel { display: flex; }
  
  .info-panel-toggle {
    right: calc(var(--safe-right) + 16px);
  }
  
  .node-label { opacity: 1; }
  
  .toast-container {
    bottom: 24px;
    left: calc(var(--sidebar-width) + 50%);
    transform: translateX(-50%);
  }
  
  body.info-open .toast-container {
    left: calc(var(--sidebar-width) + (100% - var(--sidebar-width) - var(--panel-width)) / 2);
  }
}

/* ============================================
   RESPONSIVE - DESKTOP (1024px+)
   ============================================ */
@media (min-width: 1024px) {
  :root {
    --sidebar-width: 260px;
    --panel-width: 420px;
    --panel-width-expanded: 600px;
  }
  
  .connections-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
  }
  
  .info-panel.expanded .connections-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .info-panel.expanded .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ============================================
   RESPONSIVE - MOBILE ONLY (< 768px)
   ============================================ */
@media (max-width: 767px) {
  .left-sidebar { display: none !important; }
  .info-panel { display: none !important; }
  .info-panel-toggle { display: none !important; }
  
  .mobile-info-panel { display: flex; }
  
  body.info-open .mobile-bottom-bar,
  body.info-open .mobile-tools-panel { opacity: 0; pointer-events: none; }
  
  .info-cover { height: 140px; }
  
  .info-avatar {
    width: 80px;
    height: 80px;
  }
  
  .info-avatar-wrapper { margin-top: -40px; }
  
  .info-name { font-size: 20px; }
  
  .social-links { gap: 6px; padding: 16px; }
  .social-link { width: 40px; height: 40px; }
  .social-link svg { width: 18px; height: 18px; }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    padding: 16px;
  }
  
  .stat-card { padding: 12px; }
  .stat-card-value { font-size: 18px; }
  
  .connections-section { padding: 16px; }
  .connection-card { padding: 10px; }
}

/* ============================================
   RESPONSIVE - SMALL MOBILE (< 480px)
   ============================================ */
@media (max-width: 479px) {
  .header { padding: 0 12px; }
  .brand-icon { width: 36px; height: 36px; font-size: 12px; }
  .header-button { width: 36px; height: 36px; }
  
  .modal-content { margin: 16px; }
  .shortcuts-grid { grid-template-columns: 1fr; padding: 16px; }
  
  .social-link { width: 36px; height: 36px; }
  .social-link svg { width: 16px; height: 16px; }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

:focus-visible {
  outline: 2px solid var(--pc-person);
  outline-offset: 2px;
}

.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;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  padding: 12px 24px;
  background: var(--pc-person);
  color: white;
  font-weight: 600;
  z-index: 9999;
  transition: top var(--transition-fast);
}

.skip-link:focus { top: 0; }