:root{
  --bg:#0b0f1a; --panel:#0f172a; --text:#e5f0ff;
  --muted:#9fb4d6; --accent1:#22d3ee; --accent2:#34d399;
  --glass: rgba(255,255,255,0.06);
  --border: rgba(255,255,255,0.12);
}
*{box-sizing:border-box}
html,body{margin:0; padding:0; background:var(--bg); color:var(--text); font-family: system-ui,-apple-system, Segoe UI, Roboto, Inter, Arial, sans-serif;}
a{color:inherit; text-decoration:none}
.container{max-width:1100px; margin:0 auto; padding:0 16px}
.btn{display:inline-flex; align-items:center; gap:.5rem; padding:.7rem 1rem; border-radius:12px; border:1px solid var(--border); background:linear-gradient(to bottom, rgba(34,211,238,.12), rgba(52,211,153,.08)); font-weight:600}
.btn:hover{box-shadow:0 8px 24px -12px rgba(34,211,238,.5)}
.btn-ghost{background:transparent}
.btn-primary{background:linear-gradient(90deg, var(--accent1), var(--accent2)); border-color:transparent; color:#002027}
.pill{display:inline-block; padding:.35rem .6rem; border:1px solid var(--border); border-radius:999px; background:rgba(255,255,255,.05); font-size:.8rem; color:#cfe2ff}
.accent{background:linear-gradient(90deg,var(--accent1),var(--accent2)); -webkit-background-clip:text; background-clip:text; color:transparent}
.glass{background:rgba(255,255,255,.03); backdrop-filter: blur(6px)}
/* Nav */
header.nav{position:sticky; top:0; z-index:50; border-bottom:1px solid var(--border);}
header.nav .bar{display:flex; align-items:center; justify-content:space-between; padding:12px 0}
.links{display:flex; align-items:center; gap:18px}
.links a{opacity:.9}
.links a:hover{opacity:1; text-decoration:underline}
.menu-btn{display:none; width:40px; height:40px; border-radius:10px; background:var(--glass); border:1px solid var(--border); align-items:center; justify-content:center}
.menu-btn span{display:block; width:18px; height:2px; margin:2px 0; background:#cfe2ff}
@media (max-width:900px){
  .links{display:none}
  .menu-btn{display:inline-flex}
}
.mobile-menu{display:none; position:fixed; top:56px; left:0; right:0; background:var(--panel); border-top:1px solid var(--border); padding:12px 16px}
.mobile-menu a{display:block; padding:12px 0; border-bottom:1px dashed var(--border)}
.mobile-menu a:last-child{border-bottom:0}
/* Hero */
.hero{position:relative; padding:56px 0 32px; overflow:hidden}
.hero h1{font-size: clamp(28px, 6vw, 48px); margin:10px 0}
.hero .sub{color:var(--muted); max-width:720px}
.badges{display:flex; flex-wrap:wrap; gap:8px; padding:0; list-style:none; margin:16px 0 0}
/* Sections */
.section{padding:56px 0}
.section h2{font-size: clamp(24px, 5vw, 36px); margin:0 0 12px}
.lead{color:#c6dcff; font-size:1.05rem}
.grid{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
@media (max-width:900px){ .grid{grid-template-columns:1fr} }
.card{background:var(--panel); border:1px solid var(--border); border-radius:16px; padding:16px}
.footer{border-top:1px solid var(--border); padding:18px 0; color:#c0d0ee; font-size:.9rem}
/* Animation block */
.anim-wrap{display:grid; grid-template-columns: 1.2fr .8fr; gap:24px; align-items:center}
@media (max-width:900px){ .anim-wrap{grid-template-columns:1fr; gap:12px} }
.stage{background:linear-gradient(180deg, #0e1a2b, #0a1423); border:1px solid var(--border); border-radius:16px; padding:16px; position:relative; min-height:280px; overflow:hidden}
.stage svg{width:100%; height:260px; display:block}
.caption{color:#cfe2ff; font-size:.9rem; margin-top:8px}
/* Keyframes */
@keyframes carApproach { 0%{transform: translateX(-120px);} 100%{transform: translateX(0);} }
@keyframes carShake { 0%,100%{transform: translateX(0);} 20%{transform: translateX(-3px);} 40%{transform: translateX(3px);} 60%{transform: translateX(-2px);} 80%{transform: translateX(2px);} }
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:.2} }
@keyframes barrierOpen { 0%{transform: rotate(0deg);} 100%{transform: rotate(-78deg);} }
@keyframes phonePulse { 0%{transform: scale(1); opacity:.7} 50%{transform: scale(1.12); opacity:1} 100%{transform: scale(1); opacity:.7} }
@keyframes glow { 0%{opacity:.4} 50%{opacity:1} 100%{opacity:.4} }
.hidden{display:none}
/* States applied via JS */
.state-1 .car{animation: carApproach 1.6s ease-out forwards;}
.state-1 .tag{animation: blink .5s linear infinite;}
.state-1 .car-stress{animation: carShake .6s ease-in-out .9s 2}
.state-2 .bar{transform-origin: 310px 150px; animation: barrierOpen 1.2s ease forwards}
.state-2 .phone{animation: phonePulse 1.2s ease-in-out infinite}
.state-2 .beam{opacity:.85; animation: glow 1.8s ease-in-out infinite}
.state-2 .car{animation: carApproach 1.2s ease-out forwards}
.legend{font-size:.8rem; color:#b7c9ec}
/* underline */
.u-underline{text-decoration:none; background-image: linear-gradient(var(--text),var(--text)); background-position: 0 100%; background-repeat:no-repeat; background-size:0% 1px; transition: background-size .3s}
.u-underline:hover{background-size:100% 1px}