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

:root {
  --accent: #64ffda;
  --accent-dim: rgba(100, 255, 218, 0.1);
  --accent-border: rgba(100, 255, 218, 0.18);
  --bg-sidebar: rgba(6, 10, 24, 0.92);
  --bg-panel: rgba(8, 13, 30, 0.97);
  --text-primary: #e2e8f0;
  --text-secondary: rgba(226, 232, 240, 0.55);
  --font-sans: Inter, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'Courier New', monospace;
  --sidebar-w: 270px;
  --panel-w: 500px;
}

body {
  font-family: var(--font-sans);
  background: #000;
  color: var(--text-primary);
  overflow: hidden;
  height: 100vh;
}

#container {
  position: fixed;
  inset: 0;
  z-index: 0;
}

/* SIDEBAR */

#sidebar {
  position: fixed;
  top: 0; left: 0;
  width: var(--sidebar-w);
  height: 100vh;
  background: var(--bg-sidebar);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-right: 1px solid var(--accent-border);
  display: flex;
  flex-direction: column;
  z-index: 100;
}

#sidebar-brand {
  padding: 22px 18px 16px;
  border-bottom: 1px solid var(--accent-border);
}
#sidebar-brand h1 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.3px;
  margin-bottom: 3px;
}
#sidebar-brand p {
  font-size: 10.5px;
  color: var(--text-secondary);
}

/* NAV */

#nav-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-height: 0;
}

#breadcrumbs {
  padding: 8px 14px;
  font-size: 10px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--accent-border);
  min-height: 34px;
}
.breadcrumb-item { cursor: pointer; transition: color 0.15s; }
.breadcrumb-item:hover { color: var(--accent); }
.breadcrumb-separator { opacity: 0.35; }

#nav-tree {
  flex: 1;
  overflow-y: auto;
  padding: 6px;
  min-height: 0;
}
#nav-tree::-webkit-scrollbar { width: 3px; }
#nav-tree::-webkit-scrollbar-thumb { background: var(--accent-border); border-radius: 2px; }

.tree-item {
  padding: 6px 10px;
  cursor: pointer;
  border-radius: 5px;
  transition: all 0.12s;
  font-size: 12.5px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 1px;
  user-select: none;
}
.tree-item:hover { background: var(--accent-dim); color: var(--text-primary); }
.tree-item.active {
  background: var(--accent-dim);
  color: var(--accent);
  border-left: 2px solid var(--accent);
  padding-left: 8px;
}
.tree-item.has-children::before {
  content: '›';
  font-size: 16px;
  font-weight: 600;
  transition: transform 0.12s;
  color: var(--text-secondary);
  flex-shrink: 0;
  line-height: 1;
}
.tree-item.has-children.expanded::before { transform: rotate(90deg); }
.tree-item.no-children { padding-left: 22px; }

.tree-children {
  margin-left: 8px;
  border-left: 1px solid var(--accent-border);
  padding-left: 4px;
  display: none;
}
.tree-children.expanded { display: block; }

#nav-controls {
  padding: 8px 10px;
  border-top: 1px solid var(--accent-border);
  display: flex;
  gap: 6px;
}
.nav-btn {
  flex: 1;
  padding: 6px;
  background: transparent;
  border: 1px solid var(--accent-border);
  color: var(--text-secondary);
  font-size: 11px;
  cursor: pointer;
  border-radius: 5px;
  transition: all 0.12s;
  font-family: var(--font-sans);
}
.nav-btn:hover { background: var(--accent-dim); color: var(--accent); border-color: var(--accent); }
.nav-btn:disabled { opacity: 0.3; cursor: not-allowed; }

/* SIDEBAR FOOTER */

#sidebar-footer {
  padding: 14px;
  border-top: 1px solid var(--accent-border);
}
.sidebar-newsletter {
  background: var(--accent-dim);
  border: 1px solid var(--accent-border);
  border-radius: 8px;
  padding: 13px;
}
.sidebar-newsletter p {
  font-size: 11px;
  color: var(--text-secondary);
  margin-bottom: 9px;
  line-height: 1.5;
}
.newsletter-form { display: flex; flex-direction: column; gap: 7px; }
.newsletter-form input[type="email"] {
  background: rgba(0,0,0,0.35);
  border: 1px solid var(--accent-border);
  border-radius: 5px;
  padding: 7px 10px;
  font-size: 12px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  outline: none;
  transition: border-color 0.15s;
  width: 100%;
}
.newsletter-form input[type="email"]:focus { border-color: var(--accent); }
.newsletter-form input[type="email"]::placeholder { color: var(--text-secondary); }

.btn-primary {
  background: var(--accent);
  color: #000;
  border: none;
  border-radius: 5px;
  padding: 8px 12px;
  font-size: 11.5px;
  font-weight: 700;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: all 0.12s;
}
.btn-primary:hover { background: #80ffeb; }

/* CONTENT PANEL */

#content-panel {
  position: fixed;
  top: 0;
  left: var(--sidebar-w);
  width: var(--panel-w);
  height: 100vh;
  background: var(--bg-panel);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-right: 1px solid var(--accent-border);
  display: flex;
  flex-direction: column;
  z-index: 90;
  transform: translateX(calc(-1 * var(--panel-w)));
  transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
}
#content-panel.active { transform: translateX(0); }

#content-header {
  padding: 14px 18px;
  border-bottom: 1px solid var(--accent-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
  min-height: 52px;
}
#content-title {
  font-size: 10.5px;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.8px;
}
#content-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 22px;
  cursor: pointer;
  padding: 0;
  line-height: 1;
  transition: color 0.12s;
}
#content-close:hover { color: var(--text-primary); }

#content-body {
  flex: 1;
  overflow-y: auto;
  padding: 22px;
}
#content-body::-webkit-scrollbar { width: 3px; }
#content-body::-webkit-scrollbar-thumb { background: var(--accent-border); border-radius: 2px; }

/* CONTENT TYPOGRAPHY */

#content-body h1 {
  font-size: 21px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
  line-height: 1.3;
}
#content-body h2 {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  margin: 26px 0 8px;
  padding-bottom: 5px;
  border-bottom: 1px solid var(--accent-border);
}
#content-body h3 {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 18px 0 6px;
}
#content-body h4, #content-body h5, #content-body h6 {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  margin: 12px 0 5px;
}
#content-body p {
  font-size: 13px;
  line-height: 1.75;
  color: var(--text-secondary);
  margin-bottom: 12px;
}
#content-body ul, #content-body ol {
  margin-left: 18px;
  margin-bottom: 12px;
}
#content-body li {
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 4px;
}
#content-body ul li::marker { color: var(--accent); }
#content-body ol li::marker { color: var(--accent); }
#content-body a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--accent-border);
  transition: border-color 0.12s;
}
#content-body a:hover { border-bottom-color: var(--accent); }
#content-body strong { color: var(--text-primary); font-weight: 600; }
#content-body em { font-style: italic; opacity: 0.85; }
#content-body code {
  background: rgba(100,255,218,0.07);
  border: 1px solid var(--accent-border);
  padding: 1px 5px;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--accent);
}
#content-body pre {
  background: rgba(0,0,0,0.45);
  border: 1px solid var(--accent-border);
  border-left: 2px solid var(--accent);
  padding: 13px 15px;
  border-radius: 4px;
  overflow-x: auto;
  margin-bottom: 14px;
}
#content-body pre code {
  background: none; border: none; padding: 0;
  font-size: 12px; color: var(--text-secondary);
}
#content-body blockquote {
  border-left: 2px solid var(--accent);
  padding: 8px 14px;
  margin: 0 0 14px;
  background: var(--accent-dim);
  border-radius: 0 4px 4px 0;
}
#content-body blockquote p { margin-bottom: 0; }
#content-body hr {
  border: none;
  border-top: 1px solid var(--accent-border);
  margin: 22px 0;
}
#content-body table {
  border-collapse: collapse;
  width: 100%;
  margin-bottom: 14px;
  font-size: 12px;
}
#content-body table th,
#content-body table td {
  border: 1px solid var(--accent-border);
  padding: 7px 11px;
  text-align: left;
}
#content-body table th {
  background: var(--accent-dim);
  color: var(--accent);
  font-weight: 600;
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
#content-body table td { color: var(--text-secondary); }
#content-body table tr:hover { background: rgba(100,255,218,0.03); }

/* NODE HOVER INFO */

#nodeInfo {
  position: fixed;
  bottom: 22px; right: 22px;
  max-width: 250px;
  padding: 12px 14px;
  background: rgba(6,10,24,0.92);
  border: 1px solid var(--accent-border);
  border-radius: 8px;
  opacity: 0;
  transform: translateY(5px);
  transition: opacity 0.2s, transform 0.2s;
  pointer-events: none;
  z-index: 80;
  backdrop-filter: blur(12px);
}
#nodeInfo.visible { opacity: 1; transform: translateY(0); }
#nodeName { font-size: 12px; font-weight: 600; color: var(--text-primary); margin-bottom: 4px; }
#nodeDesc { font-size: 11px; color: var(--text-secondary); line-height: 1.5; }

/* HUD */

#hud {
  position: fixed;
  top: 18px; right: 18px;
  font-size: 9px;
  color: rgba(100,255,218,0.25);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  pointer-events: none;
  z-index: 80;
  text-align: right;
  font-family: var(--font-mono);
}
#hud div { margin-bottom: 4px; }

/* PULSE BUTTON */

#pulse-btn {
  position: fixed;
  bottom: 22px;
  left: calc(var(--sidebar-w) + 16px);
  width: 38px; height: 38px;
  background: var(--accent-dim);
  border: 1px solid var(--accent-border);
  color: var(--accent);
  border-radius: 50%;
  font-size: 14px;
  cursor: pointer;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}
#pulse-btn:hover { border-color: var(--accent); transform: scale(1.1); }

/* EXTERNAL CONTENT VIEWER */

#content-viewer {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.97);
  z-index: 2000;
  display: none;
  flex-direction: column;
}
#content-viewer.active { display: flex; }
#viewer-header {
  background: rgba(6,10,24,0.99);
  border-bottom: 1px solid var(--accent-border);
  padding: 13px 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
#viewer-title { color: var(--accent); font-size: 13px; font-weight: 600; flex: 1; }
#viewer-url {
  color: var(--text-secondary); font-size: 11px;
  margin-left: 14px; flex: 2;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  font-family: var(--font-mono);
}
#viewer-close { color: var(--text-secondary); font-size: 22px; cursor: pointer; padding: 0 6px; transition: color 0.12s; }
#viewer-close:hover { color: var(--text-primary); }
#viewer-iframe { flex: 1; border: none; background: #fff; }
#viewer-loading {
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%,-50%);
  color: var(--accent); font-size: 13px;
  animation: pulse 1.5s ease-in-out infinite;
}

/* TURNSTILE */

#turnstile-container {
  position: fixed;
  bottom: 18px; left: 18px;
  z-index: 50;
  opacity: 0.5;
  transition: opacity 0.2s;
}
#turnstile-container:hover { opacity: 1; }

/* SYNAPTIC POPUP */

.synaptic-popup {
  position: fixed;
  z-index: 3000;
  background: rgba(6,10,24,0.97);
  border: 1px solid var(--accent-border);
  border-radius: 10px;
  padding: 16px 20px;
  max-width: 340px; min-width: 240px;
  box-shadow: 0 8px 40px rgba(0,0,0,0.6), 0 0 20px rgba(100,255,218,0.06);
  backdrop-filter: blur(20px);
  opacity: 0;
  transform: scale(0.94) translateY(8px);
  transition: all 0.25s cubic-bezier(0.34, 1.4, 0.64, 1);
  pointer-events: none;
  font-family: var(--font-sans);
}
.synaptic-popup.visible { opacity: 1; transform: scale(1) translateY(0); pointer-events: auto; }
.synaptic-popup.closing { opacity: 0; transform: scale(0.96) translateY(-4px); transition: all 0.18s ease-in; }

.synaptic-popup.top-right { top: 70px; right: 20px; }
.synaptic-popup.right-stack { top: 70px; right: 20px; }
.synaptic-popup.top-left { top: 70px; left: calc(var(--sidebar-w) + 14px); }
.synaptic-popup.bottom-center { bottom: 70px; left: 50%; transform: translateX(-50%) scale(0.94); }
.synaptic-popup.bottom-center.visible { transform: translateX(-50%) scale(1); }
.synaptic-popup.center { top: 50%; left: 50%; transform: translate(-50%,-50%) scale(0.94); }
.synaptic-popup.center.visible { transform: translate(-50%,-50%) scale(1); }

.synaptic-popup-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; padding-bottom: 9px; border-bottom: 1px solid var(--accent-border); }
.synaptic-popup-title { font-size: 10.5px; font-weight: 700; color: var(--accent); text-transform: uppercase; letter-spacing: 1.5px; }
.synaptic-popup-close { cursor: pointer; color: var(--text-secondary); font-size: 17px; line-height: 1; transition: color 0.12s; }
.synaptic-popup-close:hover { color: var(--text-primary); }
.synaptic-popup-content { color: var(--text-secondary); font-size: 12.5px; line-height: 1.65; }
.synaptic-popup-content strong { color: var(--text-primary); }
.synaptic-popup-footer { display: flex; gap: 7px; margin-top: 14px; padding-top: 11px; border-top: 1px solid var(--accent-border); }
.synaptic-popup-btn { flex: 1; padding: 8px; border-radius: 5px; font-size: 11px; font-weight: 600; cursor: pointer; transition: all 0.12s; font-family: var(--font-sans); }
.synaptic-popup-btn.primary { background: var(--accent); border: none; color: #000; }
.synaptic-popup-btn.primary:hover { background: #80ffeb; }
.synaptic-popup-btn.secondary { background: transparent; border: 1px solid var(--accent-border); color: var(--text-secondary); }
.synaptic-popup-btn.secondary:hover { background: var(--accent-dim); color: var(--text-primary); }
.synaptic-popup-progress { position: absolute; bottom: 0; left: 0; height: 2px; background: var(--accent); border-radius: 0 0 8px 8px; }

.synaptic-popup.warning { border-color: rgba(255,230,109,0.3); }
.synaptic-popup.warning .synaptic-popup-title { color: #ffe66d; }
.synaptic-popup.error { border-color: rgba(255,107,107,0.3); }
.synaptic-popup.error .synaptic-popup-title { color: #ff6b6b; }
.synaptic-popup.success { border-color: rgba(78,205,196,0.3); }
.synaptic-popup.success .synaptic-popup-title { color: #4ecdc4; }

/* MOBILE */

#mobile-menu-btn {
  display: none;
  position: fixed;
  top: 14px; left: 14px;
  z-index: 200;
  width: 34px; height: 34px;
  background: var(--bg-sidebar);
  border: 1px solid var(--accent-border);
  border-radius: 6px;
  color: var(--accent);
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 16px;
}

@media (max-width: 768px) {
  :root { --sidebar-w: 0px; }
  #sidebar { transform: translateX(-270px); transition: transform 0.25s; width: 270px; }
  #sidebar.open { transform: translateX(0); }
  #content-panel { left: 0; width: 100vw; }
  #pulse-btn { left: 16px; }
  #mobile-menu-btn { display: flex; }
  #hud { display: none; }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}