style.css

*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body{
    background-color: antiquewhite;
}
.container{
    background-color: white;
    width: 70%;
    margin: auto;
    min-height: 100vh;
    padding: 30px;
}
form{
    display: flex;
    flex-direction: column;
}
input,textarea,button{
    padding: 10px;
    border: 1px solid rgba(0, 0, 0, 0.2);
    font: 100 1.1rem sans-serif;
    border-radius: 5px;
    outline: none;
    margin: 10px;
}
button{
    background-color: rgb(50, 50, 50);
    cursor: pointer;
    color: white;
    transition: .3s;
}
button:hover{
    background-color: rgb(155, 130, 179);
}
.task > div{
    width: 100%;
}
.task{
    display: flex;
    align-items: center;
    background-color: rgb(186, 227, 227);
    font: 100 1.1rem sans-serif;
    margin: 2vmax;
    padding: 30px;
    color: rgba(0, 0, 0,0.8);
}
.task span{
    color: rgba(0, 0, 0,0.6);
}
.deteteBtn{
    border-radius: 100%;
    width: 30px;
    height: 30px;
    font-size: 1.6rem;
    display: flex;
    align-items: center;
    border-color: crimson;
    justify-content: center;
    background-color: crimson;
}