.imc-box{max-width:650px;margin:30px auto;padding:25px;background:#f2f2f2;border-radius:18px;font-family:Arial;box-sizing:border-box}.imc-box.dark{background:#222;color:#fff}.imc-box input,.imc-box select{width:100%;padding:12px;margin:8px 0 15px;box-sizing:border-box}.imc-box button{padding:12px;margin:5px;border-radius:8px;cursor:pointer}#imc-result{background:white;color:#111;padding:20px;margin-top:20px;line-height:1.8}@media(max-width:600px){.imc-box button{width:100%}}