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

body {
    background-color: #0f4155;
    background-image: url("img.jpg");
    background-size: cover ;
}

header {
    position: fixed;
    top: 0;
    width: 100%;
    text-align: center;
    background-color: white;
    border: 3px solid black;
    margin-bottom: 30px;
}

.cont {
    width: 100wh;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.box {
    width: 300px;
    height: 400px;
    background-color: #fff;
    text-align: center;
    border-radius: 10px;
    margin: 30px;
}

input,
#buttonn {
    margin-top: 40px;
}

input {
    width: 200px;
    height: 40px;
    border: 2px solid black;
    font-size: 20px;
    font-family: Arial, Helvetica, sans-serif;
    margin-bottom: 20px;
}

#buttonn {
    width: 80px;
    height: 40px;
    background-color: black;
    color: white;
}

#buttonn:hover {
    cursor: pointer;
    border-radius: 15px;
    transition: 0.5s;
}

.todolist {
    height: 250px;
    text-align: center;
    overflow: auto;
}

.todolist>h3 {
    padding: 5px;
    position: relative;

}

footer {
    position: fixed;
    bottom: 0;
    background-color: white;
    width: 100%;
    text-align: center;

}

span {
    position: absolute;
    right: 5px;
    top: 0px;
    cursor: pointer;
    font-size: 25px;
}