.completed {
    text-decoration: line-through;
    color: gray;
    border: 1px solid gray;
}

body {
    background: rgb(0, 0, 0);
    background: radial-gradient(circle, rgba(0,0,0,0.028124999999999956) 0%, rgba(253,187,45,1) 100%);
    font-family: Arial, sans-serif;
    text-align: center;
    margin-top: 50px;
}

#todo-container {
    background: rgb(41, 33, 33);
    width: 400px;
    margin: 0 auto;
    border: 2px solid #0033ff;
    padding: 20px;
    color: white;
    border-radius: 15px;
}

#header {
    margin: 5px;
    font-size: 20px;
    text-align: center;
}

h1 {
    margin-bottom: 20px;
}

#input-box {
    width: 200px;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
    margin-right: 5px;
    font-size: 20px;
}

#input-button {
    font-size: 20px;
    cursor: pointer;
    transition: 0.4s;
    padding: 10px;
    border: none;
    border-radius: 5px;
    background-color: #2e60ea;
}

#input-button:hover {
    background-color: #9eb7fd;
}

ul {
    list-style: none;
    padding: 0;
    margin-top: 20px;
    text-align:left;
}

li {
    border: 1px solid white;
    border-radius: 5px;
    margin-bottom: 10px;
    padding: 10px;
    margin-top: 10px;
}

.edit-btn, .delete-btn {
    float: right;
    color: crimson;
    cursor: pointer;
    margin: 3px 5px;
    border: none;
    padding: 3px 5px;
    background: none;
}

.completed {
    text-decoration: line-through;
    color: gray;
    border: 1px solid gray;
}