/* ═══════════════════════════════════════════════════════════
   AAuth Knowledge Graph — Dark Security Theme
   
   Design system:
   - Background: slate-900 (#0F172A) with subtle grid
   - Surfaces: glassmorphism (blur + translucent bg)
   - Typography: Inter (UI), JetBrains Mono (code/tokens)
   - Nodes: colored with glow matching trust domain
   - Edges: colored by layer with animated dash on active
   ═══════════════════════════════════════════════════════════ */

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

/* ─── CSS Variables ───────────────────────────────────────── */
:root {
  /* Base palette */
  --bg-primary:    #0F172A;
  --bg-secondary:  #1E293B;
  --bg-tertiary:   #334155;
  --surface:       rgba(30, 41, 59, 0.85);
  --surface-hover: rgba(51, 65, 85, 0.9);
  --border:        rgba(148, 163, 184, 0.15);
  --border-bright: rgba(148, 163, 184, 0.3);

  /* Text */
  --text-primary:   #E2E8F0;
  --text-secondary: #94A3B8;
  --text-muted:     #64748B;
  --text-bright:    #F8FAFC;

  /* Trust domain colours (participant nodes) */
  --agent-color:       #06B6D4;
  --resource-color:    #10B981;
  --ps-color:          #8B5CF6;
  --as-color:          #F59E0B;
  --user-color:        #14B8A6;
  --agentserver-color: #6366F1;

  /* Token colours */
  --token-agent:    #22D3EE;
  --token-resource: #34D399;
  --token-auth:     #FBBF24;
  --token-opaque:   #64748B;

  /* Layer edge colours */
  --edge-signing:  #94A3B8;
  --edge-access:   #06B6D4;
  --edge-mission:  #8B5CF6;
  --edge-advanced: #F59E0B;

  /* Glow intensities */
  --glow-sm: 8px;
  --glow-md: 14px;
  --glow-lg: 22px;

  /* Layout */
  --sidebar-width: 380px;
  --toolbar-height: 56px;
  --radius: 12px;
  --radius-sm: 8px;

  /* Animation */
  --transition-fast: 150ms ease;
  --transition-med:  300ms ease;
  --transition-slow: 500ms ease;
}

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

html, body {
  height: 100%;
  overflow: hidden;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 14px;
  color: var(--text-primary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
}

/* Subtle grid pattern on background — evokes technical/blueprint feel */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

/* ─── Layout ──────────────────────────────────────────────── */
#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  position: relative;
  z-index: 1;
}

#main {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* ─── Header / Brand Bar ──────────────────────────────────── */
#header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--toolbar-height);
  padding: 0 20px;
  background: var(--surface);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}

#header .brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

#header .brand-logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-bright);
  letter-spacing: -0.5px;
}

#header .brand-logo span {
  color: var(--agent-color);
}

#header .brand-sub {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 400;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

/* ─── Toolbar (Layer Filters) ─────────────────────────────── */
/* #toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  z-index: 90;
} */

/* Layer filter buttons */
.layer-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  user-select: none;
}

.layer-btn:hover {
  border-color: var(--border-bright);
  background: var(--surface-hover);
  color: var(--text-primary);
}

.layer-btn.active {
  color: var(--text-bright);
  border-color: var(--active-color, var(--border-bright));
  background: rgba(var(--active-rgb, 148, 163, 184), 0.15);
  box-shadow: 0 0 var(--glow-sm) rgba(var(--active-rgb, 148, 163, 184), 0.3);
}

.layer-btn .icon {
  font-size: 14px;
}

/* Layer-specific active colours */
.layer-btn[data-layer="signing"].active {
  --active-color: var(--edge-signing);
  --active-rgb: 148, 163, 184;
}
.layer-btn[data-layer="access"].active {
  --active-color: var(--edge-access);
  --active-rgb: 6, 182, 212;
}
.layer-btn[data-layer="mission"].active {
  --active-color: var(--edge-mission);
  --active-rgb: 139, 92, 246;
}
.layer-btn[data-layer="advanced"].active {
  --active-color: var(--edge-advanced);
  --active-rgb: 245, 158, 11;
}

/* Sub-filter dropdown */
.sublayer-group {
  display: none;
  align-items: center;
  gap: 4px;
  margin-left: 4px;
  padding-left: 12px;
  border-left: 1px solid var(--border);
}

.sublayer-group.visible {
  display: flex;
}

.sublayer-btn {
  padding: 4px 10px;
  border-radius: 14px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-muted);
  font-family: 'Inter', sans-serif;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.sublayer-btn:hover {
  color: var(--text-secondary);
  background: var(--surface-hover);
}

.sublayer-btn.active {
  color: var(--text-primary);
  border-color: var(--border-bright);
  background: var(--surface-hover);
}

/* View toggle & step controls */
.view-toggle {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
}

.toggle-switch {
  position: relative;
  width: 44px;
  height: 24px;
  border-radius: 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.toggle-switch.active {
  background: var(--agent-color);
  border-color: var(--agent-color);
}

.toggle-switch::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--text-bright);
  transition: transform var(--transition-fast);
}

.toggle-switch.active::after {
  transform: translateX(20px);
}

.toggle-label {
  font-size: 12px;
  color: var(--text-secondary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Step navigation */
.step-controls {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: 16px;
  padding-left: 16px;
  border-left: 1px solid var(--border);
}

.step-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  font-size: 16px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.step-btn:hover {
  border-color: var(--border-bright);
  background: var(--surface-hover);
  color: var(--text-primary);
}

.step-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.step-indicator {
  font-size: 12px;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
  min-width: 40px;
  text-align: center;
}

/* ─── Left Nav ────────────────────────────────────────────── */
#left-nav {
  width: 200px;
  min-width: 200px;
  background: var(--surface);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  padding: 12px 0;
  display: flex;
  flex-direction: column;
  z-index: 90;
}

.nav-section {
  display: flex;
  flex-direction: column;
}

.nav-section .layer-btn {
  width: 100%;
  border-radius: 0;
  border: none;
  border-bottom: 1px solid var(--border);
  padding: 12px 16px;
  justify-content: flex-start;
  font-size: 13px;
}

.nav-section .sublayer-group {
  flex-direction: column;
  margin-left: 0;
  padding-left: 0;
  border-left: none;
  background: rgba(15, 23, 42, 0.5);
}

.nav-section .sublayer-group.visible {
  display: flex;
}

.nav-section .sublayer-btn {
  width: 100%;
  border-radius: 0;
  padding: 8px 16px 8px 36px;
  text-align: left;
  font-size: 12px;
  border-bottom: 1px solid rgba(148, 163, 184, 0.08);
}


/* ─── Graph Canvas ────────────────────────────────────────── */
#cy {
  flex: 1;
  background: transparent;
  min-height: 0;
}

/* ─── Sidebar Panel ───────────────────────────────────────── */
/* #sidebar {
  width: 0;
  min-width: 0;
  flex-shrink: 0; 
  overflow: hidden;
  background: var(--surface);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-left: 1px solid var(--border);
  border-right: none;
  transition: width var(--transition-med), min-width var(--transition-med);
  display: flex;
  flex-direction: column;
  z-index: 80;
}

#sidebar.open {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  flex-shrink: 0;   
} */

#sidebar {
  position: fixed;
  top: var(--toolbar-height);
  right: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--surface);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 150;
  transform: translateX(100%);
  transition: transform var(--transition-med);
}

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

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

.sidebar-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-bright);
}

.sidebar-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 18px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.sidebar-close:hover {
  background: var(--surface-hover);
  color: var(--text-primary);
}

.sidebar-body {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
}

/* Sidebar content sections */
.sidebar-section {
  margin-bottom: 20px;
}

.sidebar-section-label {
  font-size: 10px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.sidebar-detail {
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-secondary);
}

.sidebar-detail strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* Token/code blocks in sidebar */
.sidebar-code {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11.5px;
  line-height: 1.6;
  color: var(--agent-color);
  overflow-x: auto;
  margin: 10px 0;
  white-space: pre-wrap;
  word-break: break-all;
}

/* Participant badge in sidebar */
.participant-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 14px;
  font-size: 12px;
  font-weight: 500;
  border: 1px solid;
}

.participant-badge.agent       { color: var(--agent-color);       border-color: rgba(6,182,212,0.3);   background: rgba(6,182,212,0.1);   }
.participant-badge.resource    { color: var(--resource-color);    border-color: rgba(16,185,129,0.3);  background: rgba(16,185,129,0.1);  }
.participant-badge.ps          { color: var(--ps-color);          border-color: rgba(139,92,246,0.3);  background: rgba(139,92,246,0.1);  }
.participant-badge.as          { color: var(--as-color);          border-color: rgba(245,158,11,0.3);  background: rgba(245,158,11,0.1);  }
.participant-badge.user        { color: var(--user-color);        border-color: rgba(20,184,166,0.3);  background: rgba(20,184,166,0.1);  }
.participant-badge.agentserver { color: var(--agentserver-color); border-color: rgba(99,102,241,0.3);  background: rgba(99,102,241,0.1);  }

/* Layer tag in sidebar */
.layer-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.layer-tag.signing  { color: var(--edge-signing);  background: rgba(148,163,184,0.15); }
.layer-tag.access   { color: var(--edge-access);   background: rgba(6,182,212,0.15);   }
.layer-tag.mission  { color: var(--edge-mission);  background: rgba(139,92,246,0.15);  }
.layer-tag.advanced { color: var(--edge-advanced); background: rgba(245,158,11,0.15);  }

/* ─── Tooltip (hover) ─────────────────────────────────────── */
.graph-tooltip {
  position: absolute;
  max-width: 280px;
  padding: 8px 12px;
  background: var(--surface);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--text-primary);
  line-height: 1.5;
  pointer-events: none;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  z-index: 200;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

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

.graph-tooltip .tt-label {
  font-weight: 600;
  color: var(--text-bright);
  margin-bottom: 2px;
}

.graph-tooltip .tt-desc {
  color: var(--text-secondary);
}

/* ─── Animations ──────────────────────────────────────────── */

/* Node pulse — active participant glow breathes */
@keyframes nodePulse {
  0%, 100% { box-shadow: 0 0 var(--glow-sm) var(--node-glow); }
  50%      { box-shadow: 0 0 var(--glow-lg) var(--node-glow); }
}

/* Edge flow — animated dashes along path */
@keyframes edgeFlow {
  from { stroke-dashoffset: 24; }
  to   { stroke-dashoffset: 0; }
}

/* Fade in */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.sidebar-body > * {
  animation: fadeIn 0.3s ease forwards;
}

/* ─── Scrollbar (sidebar) ─────────────────────────────────── */
.sidebar-body::-webkit-scrollbar {
  width: 6px;
}

.sidebar-body::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar-body::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: 3px;
}

.sidebar-body::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* ─── Responsive ──────────────────────────────────────────── */
@media (max-width: 768px) {
  :root {
    --sidebar-width: 100%;
  }

  #sidebar.open {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 200;
  }

  .sublayer-group {
    flex-wrap: wrap;
  }
}

/* ─── Utility ─────────────────────────────────────────────── */
.hidden { display: none !important; }
.mono   { font-family: 'JetBrains Mono', monospace; }
.dim    { opacity: 0.3; }
.bright { opacity: 1; }

.nav-footer {
  margin-top: auto;
  padding: 16px;
  border-top: 1px solid var(--border);
}

.nav-footer-label {
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 6px;
}

.nav-footer-brand {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
  margin-bottom: 6px;
}

.nav-footer-brand:hover { color: var(--agent-color); }

.nav-footer-links {
  display: flex;
  gap: 10px;
}

.nav-footer-links a {
  font-size: 11px;
  color: var(--text-muted);
  text-decoration: none;
}

.nav-footer-links a:hover { color: var(--text-secondary); }