style.css

html{
    background-color: rgba(253, 226, 71, 0.693);
}
p{
    font-size: 20px;
}
h1 {
    color: #cd0000;
    font-size: 42px;
    letter-spacing: -2px;
    text-align: left;
}
.addtask{
    border-radius: 0px;
}
button{
    background-color: #cd0000;
    color:#ffffff;
}
button:hover{
    background-color: #646464;
}
div{
    background-color: #ffffff;
    color:#cd0000;
    font-size: 30px; 
    width: 500px;
    border: 1px solid #dedede;
}
ul {
    background-color: #ffffff;
    color:#cd0000;
    font-size: 30px; 
    padding: 0px;
    padding: 0;
    width: 600px;
    border: 1px solid #dedede;
}
li{
    list-style-type: '\2713';
    border-bottom: 1px dotted #ccc;
    text-indent: 25px;
    height: auto;
    padding: 10px;
    text-transform: capitalize;
}
li:hover {
    background-color: #f0f0f0;
    list-style-type: '\2713';
  } 
.lines {
    border-left: 1px solid #cd0000;
    border-right: 1px solid #cd0000;
    width: 2px;
    float: left;
    height: 1000px;
    margin-left: 40px;
  }
.doc {
    border-style: double;
    border: green;
    width: 600px;
    margin: 0 auto;
    padding: 0;
}
#green{
    color: #6acd00;
    text-decoration: line-through;
}