#root{max-width:1280px;margin:0 auto;padding:2rem;text-align:center;background:linear-gradient(135deg,#1e3c72,#2a5298);min-height:100vh;display:flex;align-items:center;justify-content:center}.traffic-light{display:flex;flex-direction:column;align-items:center;gap:2rem}.traffic-light h1{color:#fff;font-size:2.5rem;margin:0;text-shadow:2px 2px 4px rgba(0,0,0,.3)}.traffic-light-container{background:#333;border-radius:20px;padding:20px;box-shadow:0 10px 30px #00000080;display:flex;flex-direction:column;gap:15px;border:3px solid #555}.light{width:100px;height:100px;border-radius:50%;cursor:pointer;transition:all .3s ease;border:3px solid #666;position:relative;overflow:hidden}.light:hover{transform:scale(1.05);border-color:#888}.light.red{background:radial-gradient(circle at 30% 30%,#600,#300)}.light.yellow{background:radial-gradient(circle at 30% 30%,#650,#320)}.light.green{background:radial-gradient(circle at 30% 30%,#060,#030)}.light.purple{background:radial-gradient(circle at 30% 30%,#606,#303)}.light.red.active{background:radial-gradient(circle at 30% 30%,red,#c00);box-shadow:0 0 20px red,0 0 40px red,0 0 60px red,inset -5px -5px 20px #0000004d;border-color:#f44}.light.yellow.active{background:radial-gradient(circle at 30% 30%,#ff0,#cc0);box-shadow:0 0 20px #ff0,0 0 40px #ff0,0 0 60px #ff0,inset -5px -5px 20px #0000004d;border-color:#ff4}.light.green.active{background:radial-gradient(circle at 30% 30%,#0f0,#0c0);box-shadow:0 0 20px #0f0,0 0 40px #0f0,0 0 60px #0f0,inset -5px -5px 20px #0000004d;border-color:#4f4}.light.purple.active{background:radial-gradient(circle at 30% 30%,#f0f,#c0c);box-shadow:0 0 20px #f0f,0 0 40px #f0f,0 0 60px #f0f,inset -5px -5px 20px #0000004d;border-color:#f4f}.light.active:before{content:"";position:absolute;top:10%;left:20%;width:30%;height:30%;background:#fff9;border-radius:50%;filter:blur(10px)}.controls{display:flex;gap:1rem;flex-wrap:wrap;justify-content:center}.alternate-btn,.purple-btn{padding:12px 24px;font-size:1rem;font-weight:600;border:none;border-radius:25px;cursor:pointer;transition:all .3s ease;text-transform:uppercase;letter-spacing:1px}.alternate-btn{background:linear-gradient(45deg,#4caf50,#45a049);color:#fff;box-shadow:0 4px 15px #4caf504d}.alternate-btn:hover{background:linear-gradient(45deg,#45a049,#4caf50);transform:translateY(-2px);box-shadow:0 6px 20px #4caf5066}.purple-btn{background:linear-gradient(45deg,#9c27b0,#7b1fa2);color:#fff;box-shadow:0 4px 15px #9c27b04d}.purple-btn:hover{background:linear-gradient(45deg,#7b1fa2,#9c27b0);transform:translateY(-2px);box-shadow:0 6px 20px #9c27b066}.alternate-btn:active,.purple-btn:active{transform:translateY(0)}@media (max-width: 768px){.traffic-light h1{font-size:2rem}.light{width:80px;height:80px}.controls{flex-direction:column;align-items:center}.alternate-btn,.purple-btn{width:200px}}