/* Đổi sang thẻ khối, nổi bênh trái */
fieldset {
    position: relative;
    background-color: lightgray;
    padding: 15px 15px 15px 15px;
    margin: 30px 30px 30px 30px;
}

legend {
    position: absolute;
    top: -16px;
    left: 10px;
    font-weight: bold;
   
}

label,input, span, textarea, meter, progress, select {
    display: block;
    float: left;
    margin-bottom: 6px;
}
/* Canh lề cho thẻ label */
label{
    clear: left;
    width: 160px;
    text-align: right;
    margin-right: 10px;
    
}
input[type="range"]{
  accent-color: red;   
  height: 6px;            
}
progress {
  accent-color: red;   
            
}
.button {
    margin-left: 170px;
    margin-top: 100px;
    
}