:root{font-family:Segoe UI,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#fffffff2;background:linear-gradient(135deg,#1a1a2e,#16213e,#0f3460);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}body{margin:0;display:flex;place-items:center;justify-content:center;min-width:320px;min-height:100vh;overflow:hidden}#app{width:100%;max-width:1280px;margin:0 auto;padding:2rem;text-align:center;position:relative;z-index:10}.greeting-container{display:flex;justify-content:center;align-items:center;min-height:60vh}.card{background:#ffffff1a;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:20px;padding:3rem;box-shadow:0 8px 32px #0000004d;border:1px solid rgba(255,255,255,.2);display:flex;flex-direction:column;align-items:center;gap:1.5rem;max-width:450px;width:100%;transition:transform .3s ease,box-shadow .3s ease}.card:hover{transform:translateY(-5px);box-shadow:0 12px 40px #0006}.input-label{font-size:1.8rem;font-weight:600;color:#fff;margin-bottom:.5rem;text-shadow:0 2px 4px rgba(0,0,0,.3)}.name-input{width:100%;padding:1rem 1.5rem;font-size:1.1rem;border:2px solid rgba(255,255,255,.3);border-radius:12px;background:#ffffff1a;color:#fff;outline:none;transition:all .3s ease}.name-input::placeholder{color:#ffffff80}.name-input:focus{border-color:#646cff;background:#ffffff26;box-shadow:0 0 20px #646cff4d}.greet-button{width:100%;padding:1rem 2rem;font-size:1.2rem;font-weight:600;border-radius:12px;border:none;background:linear-gradient(135deg,#646cff,#8b5cf6);color:#fff;cursor:pointer;transition:all .3s ease;text-transform:uppercase;letter-spacing:1px;box-shadow:0 4px 15px #646cff66}.greet-button:hover{transform:translateY(-2px);box-shadow:0 6px 25px #646cff99;background:linear-gradient(135deg,#7b7fff,#a78bfa)}.greet-button:active{transform:translateY(0)}.greeting-message{font-size:1.5rem;font-weight:500;color:#4ecdc4;min-height:2rem;opacity:0;transform:translateY(10px);transition:all .5s ease;text-shadow:0 2px 8px rgba(78,205,196,.4)}.greeting-message.show{opacity:1;transform:translateY(0)}.animation-container{position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:1;overflow:hidden}.confetti{position:absolute;width:10px;height:10px;top:-10px;animation:confetti-fall linear forwards}@keyframes confetti-fall{0%{transform:translateY(0) rotate(0);opacity:1}to{transform:translateY(100vh) rotate(720deg);opacity:0}}.party-popper{position:absolute;width:12px;height:12px;border-radius:50%;animation:popper-explode ease-out forwards}@keyframes popper-explode{0%{transform:translate(0) scale(1);opacity:1}50%{opacity:1}to{transform:translate(var(--tx),var(--ty)) scale(0);opacity:0}}.glow-center{position:absolute;width:200px;height:200px;border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.8) 0%,rgba(100,108,255,.4) 40%,transparent 70%);animation:glow-pulse 2s ease-out forwards}@keyframes glow-pulse{0%{transform:scale(0);opacity:1}50%{transform:scale(1.5);opacity:.8}to{transform:scale(2);opacity:0}}.glow-ray{position:absolute;height:4px;background:linear-gradient(90deg,rgba(100,108,255,.8) 0%,transparent 100%);border-radius:2px;transform-origin:left center;animation:ray-expand 1.5s ease-out forwards}@keyframes ray-expand{0%{transform:scaleX(0);opacity:1}to{transform:scaleX(1);opacity:0}}.glow-orb{position:absolute;width:20px;height:20px;border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.9) 0%,rgba(100,108,255,.6) 50%,transparent 100%);animation:orb-float ease-in-out forwards}@keyframes orb-float{0%{transform:scale(0);opacity:0}20%{transform:scale(1);opacity:1}80%{opacity:.8}to{transform:scale(0);opacity:0}}@media(prefers-color-scheme:light){:root{color:#213547;background:linear-gradient(135deg,#667eea,#764ba2)}.card{background:#ffffffe6;border:1px solid rgba(255,255,255,.5)}.input-label{color:#333}.name-input{background:#fffc;border-color:#0003;color:#333}.name-input::placeholder{color:#0006}.name-input:focus{border-color:#646cff;background:#fff}}