style.css

:root{
    --blue: #8299CB;
    --purpleDark:#9955AA;
    --black:#050505;
    --white:#FAFAFA;
}
*{
    padding: 0;
    margin: 0;
    font-family: 'Ysabeau Infant', sans-serif;
}
body{
    background-color: #FAFAFA;
}
.container{
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;

}
.list-container{
    width: 500px;
    height: 400px;
    background-color: var(--blue);
    border-radius: 30px;
    display: flex;
    flex-direction: column;
    padding: 70px;
    color:var(--black);
}

.task-container{
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #FAFAFA;
    padding: 15px 30px;
    border-radius: 10px;
    border: 3px solid #E4E7E7;
    transition: all 0.1s ease-in;
}
.task-container textarea{
    all:unset;
    overflow: hidden;
    background-color: #FAFAFA;
    font-size: 20px;

}
.task-container:hover{
    border-color: var(--purpleDark);
}
.add-task{
    height: 20px;
    width: 30px;
}
.btn-container{
    opacity: 0;
    padding: 20px;
    display: flex;
    justify-content: space-around;
    align-items: center;
    transition: all 0.2s ease-in-out;
}
.cancel{
    all:unset;
    color: var(--black);
}
.cancel:hover{
    color: var(--purpleDark);
}
.add{
    all:unset;
    background-color:var(--white);
    padding: 9px 30px;
    border-radius: 20px;
}