style.css

*{
    margin:0;
    padding:0;box-sizing: border-box;
    font-family:Verdana, Geneva, Tahoma, sans-serif; 
}
body{
    display: flex;
    padding: 0 10px;
    align-items: center;
    justify-content: center;
    min-height:100vh;
    background-color: aquamarine;
}
.wrapper{
    width:770px;
    padding: 35px;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 10px 15px rgba(0,0,0,0.5);
}
.wrapper .content-box{
    padding: 13px 20px 0;
    border-radius: 10px;
    border: 1px solid #bfbfbf;
}
.wrapper .input-field{
    padding:13px 20px 0;
    position: absolute;
    opacity:0;
    z-index: -99;
}
.wrapper .heading{
    text-align:center;
    margin-bottom: 10px;
}
.content-box .content{
    margin-top: 17px;
    display:flex;
    padding: 12px 0;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    border-top: 1px solid #bfbfbf;
}
.content-box .content .result-details{
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: calc(100% - 140px);
}
.result-details{
    display: flex;
    height: 20px;
    list-style: none;
    align-items: center;
}
.content button{
    width: 105px;
    outline: none;
    border: none;
    background-color: aquamarine;
    padding: 8px 0px;
    font-size: 16px;
    cursor: pointer;
    border-radius: 5px;
    transition: transform 0.3s ease;
}
.content button:active{
    transform: scale(0.97);
}
.typing-text p span{
    position:relative;
}
.typing-text p span.active{
    color:orange;
}
.typing-text p span.correct{
    color:green;
}
.typing-text p span.incorrect{
    color:red;
    outline: 1px solid #fff;
    background-color: #ffc0cb;
    border-radius: 4px;
}
::selection{
    background-color: aquamarine;
}