*{margin:0;padding:0;box-sizing:border-box}body{overflow:hidden;margin:0;font-family:Segoe UI,Inter,-apple-system,BlinkMacSystemFont,sans-serif;background:linear-gradient(135deg,#fff7ed,#fee2e2);min-height:100vh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#name-input-screen{position:fixed;top:0;left:0;width:100%;height:100%;background:linear-gradient(45deg,#fff7edfa,#fee2e2f7);display:flex;justify-content:center;align-items:center;flex-direction:column;color:#dc2626;opacity:0;transition:opacity .6s cubic-bezier(.4,0,.2,1);z-index:2000;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:20px}#name-input-screen.show{opacity:1}.input-container{background:#ffffffeb;padding:clamp(1.5rem,5vw,3rem);border-radius:24px;text-align:center;max-width:min(600px,90vw);width:100%;animation:gentleFloat 4s ease-in-out infinite;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:1px solid rgba(220,38,38,.2);box-shadow:0 20px 60px #dc262626,0 8px 32px #dc26261a,inset 0 1px #fff9;position:relative;overflow:hidden}.input-container:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,#dc2626,#f87171,#fb923c);border-radius:24px 24px 0 0}.input-container h2{font-size:clamp(1.8rem,4vw,2.8rem);margin-bottom:clamp(1rem,3vw,1.5rem);color:#dc2626;font-weight:800;letter-spacing:-.5px;line-height:1.2;background:linear-gradient(135deg,#dc2626,#f87171);-webkit-background-clip:text;background-clip:text;color:transparent;position:relative;display:inline-block}.input-container h2:after{content:"🎉";margin-left:10px;font-size:.9em}#user-name-input{width:100%;padding:clamp(.875rem,2vw,1.125rem);font-size:clamp(1rem,2vw,1.25rem);border:2px solid rgba(220,38,38,.3);border-radius:12px;margin:clamp(1.5rem,3vw,2rem) 0;text-align:center;background:#ffffffe6;color:#991b1b;transition:all .3s cubic-bezier(.4,0,.2,1);font-family:inherit;letter-spacing:.5px}#user-name-input:focus{outline:none;border-color:#dc2626;box-shadow:0 0 0 4px #dc262626,0 4px 20px #dc262633;background:#fff;transform:translateY(-2px)}#user-name-input::placeholder{color:#dc262680;font-weight:500}#start-celebration-btn{background:linear-gradient(135deg,#dc2626,#f87171);color:#fff;border:none;padding:clamp(1rem,2vw,1.25rem) clamp(2rem,4vw,3rem);font-size:clamp(1rem,2vw,1.25rem);border-radius:12px;cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1);font-weight:700;margin-top:.5rem;letter-spacing:.5px;position:relative;overflow:hidden;box-shadow:0 8px 32px #dc26264d,0 4px 12px #dc262633}#start-celebration-btn:hover{transform:translateY(-3px) scale(1.02);box-shadow:0 12px 40px #dc262666,0 6px 20px #dc26264d}#start-celebration-btn:active{transform:translateY(-1px) scale(.98)}#start-celebration-btn:after{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent);transition:left .6s ease}#start-celebration-btn:hover:after{left:100%}#volume-reminder{position:fixed;top:0;left:0;width:100%;height:100%;background:linear-gradient(45deg,#fff7edfa,#fee2e2f7);display:none;justify-content:center;align-items:center;flex-direction:column;color:#dc2626;opacity:0;transition:opacity .6s ease;z-index:1000;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:20px}#volume-reminder.show{opacity:1;display:flex}.volume-content{background:#ffffffeb;padding:clamp(2rem,5vw,3.5rem);border-radius:24px;text-align:center;max-width:min(700px,90vw);width:100%;box-shadow:0 20px 60px #dc262626,0 8px 32px #dc26261a;border:1px solid rgba(220,38,38,.2)}#volume-icon{font-size:clamp(3rem,8vw,5rem);margin-bottom:clamp(1.5rem,3vw,2rem);color:#dc2626;animation:gentlePulse 2s infinite ease-in-out;display:inline-block}#volume-reminder h2{font-size:clamp(1.8rem,4vw,2.5rem);margin-bottom:clamp(1.5rem,3vw,2rem);color:#dc2626;font-weight:800;letter-spacing:-.5px;line-height:1.2}.main-instruction{font-size:clamp(1.1rem,2.5vw,1.4rem);font-weight:600;margin:clamp(.75rem,2vw,1rem) 0;color:#991b1b;line-height:1.6}.sub-instruction{font-size:clamp(1rem,2vw,1.2rem);margin:clamp(.5rem,1.5vw,.75rem) 0;color:#dc2626;line-height:1.5;opacity:.9}.tip{font-size:clamp(.9rem,1.8vw,1.1rem);color:#dc2626;font-style:italic;margin-top:clamp(1.5rem,3vw,2rem);background:#fb71711a;padding:clamp(.75rem,2vw,1rem) clamp(1.25rem,3vw,1.5rem);border-radius:12px;border:1px solid rgba(220,38,38,.2);display:inline-block}#hold-reminder{position:fixed;bottom:0;left:0;right:0;margin:0 auto;width:min(90%,800px);height:auto;min-height:80px;background:#fffffff2;display:flex;justify-content:center;align-items:center;flex-direction:column;color:#991b1b;opacity:0;transition:all .5s cubic-bezier(.4,0,.2,1);z-index:1000;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-top:3px solid #dc2626;border-radius:24px 24px 0 0;box-shadow:0 -10px 40px #dc262633,0 -4px 20px #dc26261a;padding:clamp(1rem,3vw,1.5rem);transform:translateY(100%)}#hold-reminder.show{opacity:1;transform:translateY(0)}#hold-reminder p{font-size:clamp(1rem,2vw,1.2rem);font-weight:600;text-align:center;margin:0;color:#dc2626;line-height:1.4}#congratulation-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:#fff7edf7;display:flex;justify-content:center;align-items:center;opacity:0;transition:opacity .8s cubic-bezier(.4,0,.2,1);pointer-events:none;z-index:9999;padding:20px}#congratulation-text{font-size:clamp(2.5rem,8vw,4.5rem);text-align:center;font-weight:900;padding:clamp(1rem,3vw,2rem);background:linear-gradient(135deg,#dc2626,#f87171,#fb923c,#dc2626,#991b1b);-webkit-background-clip:text;background-clip:text;color:transparent;animation:celebrationText 3s ease-in-out infinite alternate;text-shadow:2px 2px 4px rgba(220,38,38,.1),4px 4px 8px rgba(254,226,226,.2);line-height:1.1;letter-spacing:-.5px}.song-countdown{position:fixed;bottom:clamp(1rem,3vw,1.5rem);left:clamp(1rem,3vw,1.5rem);display:none;align-items:center;gap:clamp(.5rem,1.5vw,.75rem);background:linear-gradient(135deg,#dc2626,#f87171);color:#fff;padding:clamp(.75rem,2vw,1rem) clamp(1.25rem,3vw,1.5rem);border-radius:50px;font-size:clamp(.9rem,2vw,1.1rem);font-weight:700;z-index:1002;box-shadow:0 8px 32px #dc26264d,0 4px 16px #dc262633;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.2);animation:gentleCountdown 3s infinite alternate ease-in-out}.countdown-number{background:#fff;color:#dc2626;width:clamp(32px,4vw,40px);height:clamp(32px,4vw,40px);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:clamp(1rem,2vw,1.25rem);font-family:Courier New,SF Mono,monospace;font-weight:800;box-shadow:0 4px 12px #dc26264d,inset 0 2px 4px #fffc;transition:transform .3s ease}.countdown-label{display:flex;flex-direction:column;line-height:1.3}.countdown-label small{font-size:clamp(.7rem,1.5vw,.85rem);opacity:.9;font-weight:600}canvas#confetti-canvas{position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:1001}@keyframes gentleFloat{0%,to{transform:translateY(0) scale(1)}50%{transform:translateY(-10px) scale(1.01)}}@keyframes gentlePulse{0%,to{transform:scale(1);opacity:1}50%{transform:scale(1.1);opacity:.9}}@keyframes celebrationText{0%{filter:drop-shadow(0 0 10px rgba(220,38,38,.4));transform:translateY(0) rotate(-1deg)}to{filter:drop-shadow(0 0 25px rgba(239,68,68,.8));transform:translateY(-10px) rotate(1deg)}}@keyframes gentleCountdown{0%{transform:scale(1);box-shadow:0 8px 32px #dc26264d,0 4px 16px #dc262633}to{transform:scale(1.03);box-shadow:0 12px 40px #dc262666,0 6px 20px #dc26264d}}@media (max-width: 768px){.input-container{padding:1.5rem;border-radius:20px}#hold-reminder{width:95%;border-radius:16px 16px 0 0}.song-countdown{flex-direction:column;text-align:center;gap:.5rem;padding:.875rem 1.25rem}.countdown-label small{display:none}}@media (max-width: 480px){#volume-reminder h2,.input-container h2{font-size:1.6rem}.main-instruction{font-size:1.1rem}.sub-instruction{font-size:1rem}#congratulation-text{font-size:2.2rem;padding:1rem}#hold-reminder{padding:1rem}}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}@media (prefers-color-scheme: dark){.input-container,.volume-content,#hold-reminder{background:#0f172aeb;border-color:#dc26264d}#user-name-input{background:#1e293be6;color:#fecaca;border-color:#dc262666}#user-name-input::placeholder{color:#fecaca80}}