#furnace-calc-wrapper{font-family:'Inter',sans-serif;line-height:1.6}#furnace-calc-wrapper *{box-sizing:border-box}#furnace-calc-wrapper .input-group:focus-within label{color:#dc2626}#furnace-calc-wrapper input{margin:0!important}@keyframes soundPulse{0%{transform:scale(1);opacity:1}100%{transform:scale(2);opacity:0}}.sound-wave{animation:soundPulse 1s infinite ease-out;transform-origin:center}.sound-wave.quiet{animation-duration:2s;opacity:.5}.sound-wave.loud{animation-duration:0.4s;stroke:#dc2626;stroke-width:4}@keyframes spin{100%{transform:rotate(360deg)}}.blower-fan{transform-origin:center;animation:spin 0.5s infinite linear}.blower-fan.slow{animation-duration:2s}.blower-fan.stopped{animation:none}