/* NeutralNet Narrative-Driven Design System (Fusion Edition)
   - Sovereign Neutrality · Infra Credibility · Visible Security · Economic Rationality
   - Dark by default, low-saturation, high-contrast, grid-precise
*/

:root{
  /* ---- Color Tokens (from Design System + Visual Philosophy) ---- */
  --bg-page:#0A0A0F;
  --bg-card:#12121A;
  --bg-elev:#1A1A24;
  --bg-elev2:#22222E;

  --text:#F8FAFC;
  --text2:#A0A0B0;
  --text3:#6A6A7A;

  --border:#2A2A3A;
  --border2:#1E1E2A;

  --primary:#0066FF;
  --accent:#00FFF5;
  --success:#00FF66;
  --warning:#FFB800;
  --danger:#FF3366;
  --info:#00AFFF;
  --sovereign:#FFD700; /* Sovereign Gold for L2 / premium */

  --g-primary: linear-gradient(135deg, #0066FF 0%, #00FFF5 100%);
  --g-warning: linear-gradient(135deg, #FFB800 0%, #FF6B35 100%);
  --g-danger:  linear-gradient(135deg, #FF3366 0%, #FF0000 100%);
  --g-dark:    linear-gradient(180deg, #12121A 0%, #0A0A0F 100%);

  /* ---- Typography ---- */
  --font: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC","Hiragino Sans GB","Noto Sans CJK SC","Microsoft YaHei", sans-serif;
  --mono: "JetBrains Mono","SF Mono",ui-monospace,Menlo,Consolas,monospace;

  --h1: clamp(40px, 5vw, 64px);
  --h2: clamp(28px, 3.2vw, 40px);
  --h3: 22px;
  --body: 16px;

  /* ---- Radius / Shadow ---- */
  --r-sm: 10px;
  --r-md: 14px;
  --r-lg: 18px;
  --r-xl: 26px;

  --shadow-xs: 0 1px 2px rgba(0,0,0,.35);
  --shadow-sm: 0 6px 24px rgba(0,0,0,.35);
  --shadow-md: 0 14px 50px rgba(0,0,0,.48);
  --glow-primary: 0 0 28px rgba(0,102,255,.25);
  --glow-accent:  0 0 28px rgba(0,255,245,.18);
  --glow-success: 0 0 26px rgba(0,255,102,.18);

  /* ---- Motion (from Motion Spec) ---- */
  --dur-fast: 120ms;
  --dur: 200ms;
  --dur-slow: 400ms;
  --dur-page: 600ms;
  --ease-out: cubic-bezier(0.0, 0.0, 0.2, 1);
  --ease-in: cubic-bezier(0.4, 0.0, 1, 1);
  --ease-io: cubic-bezier(0.4, 0.0, 0.2, 1);
  --ease-emph: cubic-bezier(0.05, 0.7, 0.1, 1);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:var(--font);
  color:var(--text);
  background: radial-gradient(900px 500px at 22% 10%, rgba(0,102,255,.18), transparent 60%),
              radial-gradient(900px 560px at 78% 14%, rgba(0,255,245,.12), transparent 62%),
              radial-gradient(900px 560px at 50% 120%, rgba(255,184,0,.06), transparent 60%),
              var(--bg-page);
  overflow-x:hidden;
}

a{color:inherit;text-decoration:none}
a:hover{color:var(--text)}
code,kbd,pre{font-family:var(--mono)}
::selection{background:rgba(0,255,245,.18)}

.container{width:min(1200px, calc(100% - 40px)); margin:0 auto}
.section{padding: 76px 0}
@media (max-width:900px){ .section{padding: 56px 0} }

.topbar{
  position:sticky; top:0; z-index:20;
  background: rgba(10,10,15,.72);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(42,42,58,.55);
}
.nav{display:flex; align-items:center; justify-content:space-between; padding:14px 0; gap:14px}
.brand{display:flex; align-items:center; gap:10px; font-weight:700; letter-spacing:.2px}
.logo{
  width:26px; height:26px; border-radius:8px;
  background: radial-gradient(circle at 30% 30%, rgba(0,255,245,.75), rgba(0,102,255,.75));
  box-shadow: var(--glow-primary);
}
.navlinks{display:flex; gap:14px; align-items:center; flex-wrap:wrap}
.navlinks a{
  font-size:14px; color:rgba(248,250,252,.82);
  padding:8px 10px; border-radius:12px;
  transition: background var(--dur) var(--ease-out), color var(--dur) var(--ease-out);
}
.navlinks a:hover{background:rgba(26,26,36,.75)}
.navlinks a.active{background:rgba(0,102,255,.14); box-shadow: inset 0 0 0 1px rgba(0,102,255,.25)}
.navRight{display:flex; align-items:center; gap:10px}
.langSwitch{display:flex; gap:6px; padding:6px; border-radius:999px; border:1px solid rgba(42,42,58,.7); background:rgba(18,18,26,.5)}
.langSwitch a{font-size:12px; padding:6px 10px; border-radius:999px; color:rgba(248,250,252,.72)}
.langSwitch a.active{background:rgba(0,102,255,.16); color:rgba(248,250,252,.95); box-shadow: inset 0 0 0 1px rgba(0,102,255,.22)}
.cta{display:flex; gap:10px; align-items:center}
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:10px;
  padding: 10px 14px;
  border-radius: 14px;
  border: 1px solid rgba(42,42,58,.9);
  background: rgba(18,18,26,.55);
  color: rgba(248,250,252,.92);
  transition: transform var(--dur) var(--ease-out), background var(--dur) var(--ease-out), border var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease-out);
  cursor:pointer;
}
.btn:hover{transform: translateY(-1px); background: rgba(26,26,36,.7)}
.btn.primary{
  border-color: rgba(0,102,255,.35);
  background: linear-gradient(135deg, rgba(0,102,255,.9), rgba(0,255,245,.45));
  box-shadow: var(--glow-primary);
}
.btn.primary:hover{box-shadow: var(--glow-primary), 0 16px 40px rgba(0,0,0,.35)}
.btn.ghost{background:transparent}
.btn.pill{border-radius:999px}
.pillTag{
  display:inline-flex; gap:8px; align-items:center;
  font-size:12px; letter-spacing:.08em; text-transform:uppercase;
  padding: 8px 12px; border-radius:999px;
  border:1px solid rgba(42,42,58,.8);
  background: rgba(18,18,26,.55);
  color: rgba(248,250,252,.8);
}

.hero{
  padding: 54px 0 40px;
}
.heroGrid{
  display:grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 24px;
  align-items: stretch;
}
@media (max-width: 980px){ .heroGrid{grid-template-columns:1fr} }

.heroCard{
  border-radius: var(--r-xl);
  background: linear-gradient(180deg, rgba(18,18,26,.65), rgba(10,10,15,.55));
  border: 1px solid rgba(42,42,58,.75);
  box-shadow: var(--shadow-md);
  padding: 26px;
  position:relative;
  overflow:hidden;
}
.heroCard:before{
  content:"";
  position:absolute; inset:-2px;
  background: radial-gradient(600px 320px at 20% 0%, rgba(0,102,255,.18), transparent 60%),
              radial-gradient(600px 320px at 70% 20%, rgba(0,255,245,.12), transparent 60%),
              radial-gradient(600px 320px at 50% 100%, rgba(255,184,0,.08), transparent 60%);
  pointer-events:none;
}
.heroCopy{position:relative; z-index:1}
.hero h1{
  margin: 10px 0 10px;
  font-size: var(--h1);
  line-height:1.06;
  letter-spacing:-.02em;
}
.hero p{margin: 0 0 18px; color: rgba(248,250,252,.75); line-height:1.7; font-size: 16px}
.hero .subline{color: rgba(248,250,252,.68); font-size:14px}
.metrics{
  display:grid; grid-template-columns: repeat(4, minmax(0,1fr));
  gap: 12px; margin-top: 18px;
}
@media (max-width: 720px){ .metrics{grid-template-columns: repeat(2, minmax(0,1fr));} }
.metric{
  border-radius: 16px;
  padding: 14px 14px;
  border: 1px solid rgba(42,42,58,.7);
  background: rgba(18,18,26,.5);
}
.metric .k{font-size: 22px; font-weight: 700; letter-spacing:-.02em}
.metric .l{font-size: 12px; color: rgba(248,250,252,.65); margin-top: 6px}

.heroViz{
  border-radius: var(--r-xl);
  background: linear-gradient(180deg, rgba(18,18,26,.55), rgba(10,10,15,.4));
  border: 1px solid rgba(42,42,58,.75);
  box-shadow: var(--shadow-md);
  overflow:hidden;
  position:relative;
}
.heroVizHeader{
  display:flex; justify-content:space-between; align-items:center;
  padding: 16px 18px;
  border-bottom: 1px solid rgba(42,42,58,.65);
}
.heroVizHeader .title{font-weight:700}
.heroVizHeader .hint{font-size:12px; color:rgba(248,250,252,.6)}
.heroVizBody{padding: 10px 12px 16px}
.canvasWrap{border-radius: 18px; overflow:hidden; border: 1px solid rgba(42,42,58,.65); background: rgba(10,10,15,.35)}
canvas{display:block; width:100%; height: 360px}
@media (max-width: 980px){ canvas{height: 300px} }

.grid2{display:grid; grid-template-columns:1fr 1fr; gap:16px}
@media (max-width: 980px){ .grid2{grid-template-columns:1fr} }
.card{
  border-radius: var(--r-lg);
  border: 1px solid rgba(42,42,58,.72);
  background: rgba(18,18,26,.58);
  box-shadow: var(--shadow-sm);
  padding: 18px;
}
.card h3{margin:0 0 10px; font-size: 18px}
.card p{margin:0; color: rgba(248,250,252,.7); line-height: 1.65}
.kbd{
  font-family:var(--mono);
  font-size: 12px;
  padding: 4px 8px;
  border: 1px solid rgba(42,42,58,.75);
  border-bottom-color: rgba(42,42,58,.35);
  border-radius: 10px;
  background: rgba(10,10,15,.35);
  color: rgba(248,250,252,.78);
}

.chapter{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  align-items: center;
}
@media (max-width:980px){ .chapter{grid-template-columns:1fr} }
.chapter .num{
  font-family: var(--mono);
  letter-spacing: .18em;
  color: rgba(0,255,245,.75);
  font-size: 12px;
}
.chapter h2{margin: 8px 0 10px; font-size: var(--h2); line-height: 1.1}
.chapter p{margin:0; color: rgba(248,250,252,.74); line-height: 1.75}
.stage{
  border-radius: var(--r-xl);
  border: 1px solid rgba(42,42,58,.75);
  background: linear-gradient(180deg, rgba(18,18,26,.6), rgba(10,10,15,.45));
  box-shadow: var(--shadow-md);
  padding: 16px;
  position:relative;
  overflow:hidden;
}
.stage:after{
  content:"";
  position:absolute; inset:-1px;
  background: radial-gradient(600px 320px at 30% 0%, rgba(0,102,255,.12), transparent 60%),
              radial-gradient(600px 320px at 70% 30%, rgba(0,255,245,.08), transparent 60%);
  pointer-events:none;
}
.stage .inner{position:relative; z-index:1}

.badge{
  display:inline-flex; align-items:center; gap:8px;
  font-size:12px; color:rgba(248,250,252,.7);
  padding: 7px 10px;
  border-radius: 999px;
  border: 1px solid rgba(42,42,58,.75);
  background: rgba(10,10,15,.35);
}
.badge i{width:10px;height:10px;border-radius:999px;background:var(--accent);box-shadow: var(--glow-accent)}

.hr{height:1px;background:rgba(42,42,58,.65); margin: 18px 0}

.footer{
  padding: 34px 0 56px;
  border-top: 1px solid rgba(42,42,58,.6);
  background: rgba(10,10,15,.25);
}
.footer .cols{display:grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 18px}
@media (max-width:980px){ .footer .cols{grid-template-columns:1fr 1fr} }
.footer a{color: rgba(248,250,252,.72)}
.footer a:hover{color: rgba(248,250,252,.96)}
.small{font-size:12px; color: rgba(248,250,252,.58); line-height: 1.65}

/* Console shell */
.appShell{display:grid; grid-template-columns: 260px 1fr; gap: 16px}
@media (max-width: 980px){ .appShell{grid-template-columns:1fr} }

.sidebar{
  border-radius: var(--r-xl);
  border:1px solid rgba(42,42,58,.75);
  background: rgba(18,18,26,.55);
  box-shadow: var(--shadow-sm);
  padding: 14px;
  position: sticky; top: 86px; height: fit-content;
}
@media (max-width:980px){ .sidebar{position:relative; top:auto} }
.groupTitle{margin: 14px 8px 8px; font-size:12px; letter-spacing:.14em; text-transform:uppercase; color: rgba(248,250,252,.52)}
.sideitem{
  display:flex; align-items:center; justify-content:space-between;
  gap: 10px;
  padding: 10px 10px;
  border-radius: 14px;
  color: rgba(248,250,252,.78);
  border: 1px solid transparent;
  transition: background var(--dur) var(--ease-out), border var(--dur) var(--ease-out);
}
.sideitem:hover{background: rgba(26,26,36,.7)}
.sideitem.active{
  background: rgba(0,102,255,.12);
  border-color: rgba(0,102,255,.25);
}
.sideitem .sub{font-size:12px; color: rgba(248,250,252,.55)}

.main{
  border-radius: var(--r-xl);
  border:1px solid rgba(42,42,58,.75);
  background: rgba(18,18,26,.55);
  box-shadow: var(--shadow-md);
  padding: 18px;
}
.toolbar{display:flex; align-items:center; justify-content:space-between; gap:10px; flex-wrap:wrap}
.toolbar .title{font-weight:800; letter-spacing:-.01em}
.toolbar .meta{font-size:12px; color:rgba(248,250,252,.55)}
.table{width:100%; border-collapse: collapse; margin-top: 14px}
.table th,.table td{padding: 10px 10px; border-bottom: 1px solid rgba(42,42,58,.65); text-align:left; font-size: 13px; color: rgba(248,250,252,.75)}
.table th{color: rgba(248,250,252,.6); font-weight:600; letter-spacing:.08em; text-transform:uppercase; font-size: 11px}
.table tr:hover td{background: rgba(26,26,36,.4)}

.reveal{opacity:0; transform: translateY(12px); transition: opacity var(--dur-page) var(--ease-out), transform var(--dur-page) var(--ease-out)}
.reveal.in{opacity:1; transform: translateY(0)}
@media (prefers-reduced-motion: reduce){
  *{scroll-behavior:auto!important}
  .reveal{opacity:1; transform:none; transition:none}
}

/* Architecture SVG draw */
svg[data-draw] path{
  stroke-dasharray: 900;
  stroke-dashoffset: 900;
  transition: stroke-dashoffset 1100ms var(--ease-emph);
}
svg[data-draw].drawn path{stroke-dashoffset:0}

/* ---- Compatibility / Utility classes used across pages ---- */
.grid{display:grid; gap:16px}
.grid.two{grid-template-columns:1fr 1fr}
.grid.three{grid-template-columns:1fr 1fr 1fr}
@media (max-width:980px){ .grid.two,.grid.three{grid-template-columns:1fr} }

.pagehead{padding: 34px 0 12px}
.pagehead h1{margin:0; font-size: clamp(28px, 3vw, 40px); letter-spacing:-.02em}
.pagehead p{margin:8px 0 0; color:rgba(248,250,252,.68); line-height:1.7}

.chip{
  display:inline-flex; align-items:center; gap:10px;
  padding: 8px 12px; border-radius: 999px;
  border: 1px solid rgba(42,42,58,.75);
  background: rgba(10,10,15,.35);
  color: rgba(248,250,252,.72);
  font-size: 12px;
}
.stageTop{display:flex; align-items:center; justify-content:space-between; gap:12px; flex-wrap:wrap; margin-bottom:12px}
.chips{display:flex; gap:8px; flex-wrap:wrap}

.tilt{transform-style:preserve-3d}
.spark{position:absolute; inset:-2px; pointer-events:none; opacity:.9}

.input{
  width:100%;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid rgba(42,42,58,.8);
  background: rgba(10,10,15,.35);
  color: rgba(248,250,252,.9);
  outline:none;
  transition: border var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease-out), background var(--dur) var(--ease-out);
}
.input:focus{
  border-color: rgba(0,102,255,.55);
  box-shadow: 0 0 0 4px rgba(0,102,255,.14);
  background: rgba(18,18,26,.55);
}
.form-row{display:grid; gap:10px; margin-top:10px}
.note{font-size:12px; color:rgba(248,250,252,.58); line-height:1.65}

.toast{
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 50;
  max-width: 420px;
  display:none;
}
.toast.show{display:block}
.toast .msg{
  border-radius: 16px;
  border: 1px solid rgba(42,42,58,.75);
  background: rgba(18,18,26,.78);
  box-shadow: var(--shadow-md);
  padding: 12px 14px;
  color: rgba(248,250,252,.86);
}
.toast .ok{color: var(--success)}
.toast .warn{color: var(--warning)}
.toast .bad{color: var(--danger)}

.code{
  border-radius: 16px;
  border: 1px solid rgba(42,42,58,.75);
  background: rgba(10,10,15,.35);
  padding: 14px;
  overflow:auto;
  color: rgba(248,250,252,.78);
}
.kpiRow{display:grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap:12px}
@media (max-width:980px){ .kpiRow{grid-template-columns: repeat(2, minmax(0,1fr))} }
.kpiCard{
  border-radius: 18px;
  border: 1px solid rgba(42,42,58,.72);
  background: rgba(10,10,15,.28);
  padding: 14px;
}
.bigMetric{font-size: 28px; font-weight: 800; letter-spacing:-.02em}
.dim{color: rgba(248,250,252,.62)}


/* ===== Narrative Motion System (V4) ===== */
.nnMedia{position:relative; border-radius: 24px; overflow:hidden;}
#storyCanvas{width:100%; height: 520px; display:block;}
.nnMediaOverlay{
  position:absolute; left:14px; bottom:14px;
  padding:12px 14px; border-radius: 16px;
  border: 1px solid rgba(35,55,89,.55);
  background: rgba(5,7,12,.38);
  backdrop-filter: blur(10px);
  box-shadow: 0 16px 60px rgba(0,0,0,.45);
  min-width: 260px;
}
.nnMediaOverlay .k{font-size:12px; color: var(--muted2); font-weight:800; letter-spacing:.2px}
.nnMediaOverlay .v{font-size:14px; color: var(--text); margin-top:6px; font-weight:800}

.progressRail{
  position:fixed; right: 18px; top: 50%;
  transform: translateY(-50%);
  z-index: 60;
  display:flex; flex-direction:column; align-items:center;
  gap: 12px;
  pointer-events:auto;
}
@media (max-width: 980px){
  .progressRail{display:none;}
}
.progressRail .rail{
  position:absolute; left:50%; top:10px; bottom:10px;
  width: 2px; transform: translateX(-50%);
  background: linear-gradient(180deg, rgba(122,167,255,.0), rgba(122,167,255,.45), rgba(123,255,211,.28), rgba(122,167,255,.0));
  opacity: .8;
}
.progressRail .dot{
  width: 10px; height: 10px; border-radius: 999px;
  border: 1px solid rgba(35,55,89,.75);
  background: rgba(11,18,32,.65);
  box-shadow: 0 8px 30px rgba(0,0,0,.45);
  cursor:pointer;
  transition: transform .18s var(--ease), background .18s var(--ease), border-color .18s var(--ease);
}
.progressRail .dot.active{
  transform: scale(1.35);
  border-color: rgba(123,255,211,.35);
  background: rgba(123,255,211,.18);
}
/* chapter transitions */
.chapter{
  scroll-margin-top: 110px;
}
.chapter .badge{transform: translateY(6px); opacity:.92}
.chapter.active h2{color: var(--text);}
.chapter.active{
  position:relative;
}
.chapter.active::before{
  content:"";
  position:absolute;
  left:-18px; top: 32px; bottom: 32px;
  width: 2px;
  background: linear-gradient(180deg, rgba(122,167,255,0), rgba(122,167,255,.55), rgba(123,255,211,.25), rgba(122,167,255,0));
  opacity:.8;
}


/* ===== V5 Narrative Extreme (Apple-like transitions + interactive panel) ===== */
.nnCurtain{
  position: fixed; inset: 0;
  z-index: 70;
  pointer-events: none;
  opacity: 0;
  background: radial-gradient(1200px 700px at 30% 20%, rgba(122,167,255,.22), rgba(0,0,0,0)),
              radial-gradient(900px 600px at 70% 30%, rgba(123,255,211,.14), rgba(0,0,0,0)),
              linear-gradient(180deg, rgba(6,8,14,.0), rgba(6,8,14,.85), rgba(6,8,14,.0));
  backdrop-filter: blur(10px);
  transition: opacity .55s var(--ease);
}
.nnCurtain.on{opacity:1}

.nnControls{
  margin-top: 14px;
  padding: 14px;
  border-radius: 22px;
  background: rgba(5,7,12,.28);
}
.nnControls .controlsTop{display:flex; align-items:center; justify-content:space-between; gap:10px}
.modeChips{display:flex; gap:10px; align-items:center}
.chipBtn{
  border:1px solid rgba(35,55,89,.65);
  background: rgba(11,18,32,.55);
  color: var(--text);
  padding: 7px 10px;
  border-radius: 999px;
  font-weight: 800;
  font-size: 12px;
  cursor: pointer;
  transition: transform .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
}
.chipBtn:hover{transform: translateY(-1px)}
.chipBtn.active{
  border-color: rgba(123,255,211,.35);
  background: rgba(123,255,211,.14);
}
.controlsGrid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
@media(max-width: 980px){
  .controlsGrid{grid-template-columns: 1fr;}
}
.ctrl .t{font-weight: 900; letter-spacing: .2px}
.ctrl .desc{color: var(--muted); margin-top:6px; font-size: 12px; line-height: 1.5}
.ctrl .row{
  display:flex; align-items:center; gap: 10px;
  margin-top: 10px;
}
.ctrl .row label{width: 128px; color: var(--muted2); font-size: 12px; font-weight: 900}
.ctrl .row select{flex:1}
.ctrl .row input[type="range"]{flex:1}
.ctrl .row .v{min-width: 44px; text-align:right; font-weight: 900; color: var(--text)}
.ctrl .row.compact{gap:10px}
.ctrl .miniCard{
  flex:1;
  border:1px solid rgba(35,55,89,.55);
  background: rgba(11,18,32,.45);
  border-radius: 16px;
  padding: 10px 12px;
}
.ctrl .miniCard b{display:block; font-size: 18px; letter-spacing: .2px}
.ctrl .miniCard small{color: var(--muted); display:block; margin-top:6px}
.controlsFooter{display:flex; align-items:center; justify-content:space-between; gap:12px; flex-wrap:wrap}
/* Apple-like chapter crossfade */
.chapter{
  transition: opacity .6s var(--ease), transform .6s var(--ease), filter .6s var(--ease);
  opacity: .58;
  transform: translateY(10px);
  filter: saturate(.9);
}
.chapter.active{
  opacity: 1;
  transform: translateY(0px);
  filter: saturate(1);
}
/* deeper perspective in sticky media container */
.stickyMedia{
  transform-style: preserve-3d;
  perspective: 1200px;
}


/* ===== V6 Cinematic Motion Upgrade ===== */

/* stronger depth breathing */
#storyCanvas{
  animation: canvasBreath 12s ease-in-out infinite;
}
@keyframes canvasBreath{
  0%{ transform: scale(1); }
  50%{ transform: scale(1.015); }
  100%{ transform: scale(1); }
}

/* parallax tilt on mouse */
.stickyMedia:hover{
  transform: perspective(1400px) rotateX(3deg) rotateY(-4deg) scale(1.01);
  transition: transform .35s cubic-bezier(.22,.61,.36,1);
}

/* cinematic vignette stronger */
.stickyMedia::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background: radial-gradient(circle at center, rgba(0,0,0,0) 40%, rgba(0,0,0,.55) 100%);
  opacity:.7;
}

/* animated glow lines */
.nn-path{
  stroke-dasharray: 420;
  stroke-dashoffset: 420;
  animation: pathFlow 4s linear infinite;
}
@keyframes pathFlow{
  0%{ stroke-dashoffset:420; opacity:.3;}
  50%{ opacity:.8;}
  100%{ stroke-dashoffset:0; opacity:.3;}
}

/* chapter cinematic fade scale */
.chapter{
  transition: opacity .8s cubic-bezier(.22,.61,.36,1), 
              transform .8s cubic-bezier(.22,.61,.36,1);
}
.chapter.active{
  transform: translateY(0) scale(1.02);
}

/* control panel micro-motion */
.nnControls{
  animation: panelFloat 10s ease-in-out infinite;
}
@keyframes panelFloat{
  0%{ transform: translateY(0px); }
  50%{ transform: translateY(-6px); }
  100%{ transform: translateY(0px); }
}

#threeStage canvas{
  width:100% !important;
  height:100% !important;
}