styles.css

/* main and card styling and structure */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

main {
    width: 100%;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-color: rgb(50, 50, 50);
}

h1 {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 320px;
    border-bottom: 2px solid black;
    margin-bottom: 10px;
}

#card {
    width: 50rem;
    height: 35rem;
    background-color: lightgray;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-around;
    border-radius: 30px;
}

#left, #right {
    display: flex;
    flex-direction: column;
    justify-content: top;
    align-items: center;
    height: 30rem;
    width: 20rem;
}

.vert-line {
    height: 30rem;
    width: 1px;
    border: 1px solid black;
}


/* list style and hover effect */

ul {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin: 0;
    padding: 0;
}

ul li {
    list-style: none;
    cursor: pointer;
    position: relative;
    padding: 10px 100px 10px 16px;
    width: 320px;
    background: rgb(200, 200, 200);
}

ul li:nth-child(odd) {
    background: none;
}

ul li:hover {
    background: rgb(150, 150, 150);
    color: whitesmoke;
}


/* close and check button styling and hover effects */

.close {
    position: absolute;
    right: 0;
    top: 0;
    padding: 10px 16px;
}

.check {
    position: absolute;
    height: 38px;
    right: 40px;
    top: 0;
    padding: 10px 16px;
}

.close:hover {
    background: rgb(120, 0, 0);
}

.check:hover {
    background-color: rgb(0, 120, 0);
}


/* add task button styling */

.add {
    border: 2px solid rgb(120, 120, 120);
    background-color: rgb(200, 200, 200);
    width: 280px;
    height: 25px;
    margin-bottom: 10px;
}