body {
    font-weight: bold;
    background-color: rgb(36, 36, 36);
    color: white;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    height: 100vh;
}

#container {
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
    background-color: rgb(70, 70, 70);
    padding: 20px;
    border-radius: 5px;
    min-height: 50vh;
    position:relative;
    top: 50%;
    transform: translateY(-50%);;
}

form {
    display: grid;
    grid-auto-flow: column;
    align-items: center;
}

form input {
    border: 0;
    border-radius: 5px;
    font-weight: bold;
    font-size: 1em;
    height: 30px;
}
input[type=text] {
    height: 28px;
}

input[type=submit] {
    color: white;
    background-color: rgb(0, 132, 255);
    margin-left: 10px;
    max-width: 150px;
    -webkit-appearance: none;
    -moz-appearance: none;
}

input[type=submit]:hover {
    background-color: rgb(25, 162, 253);
}

input[type=submit]:active {
    background-color: rgb(3, 108, 206);
}

h1 {
    text-align: center;
}

ul {
    margin-left: 0;
    padding-left: 0;
}

li {
    list-style-type: none;
    width: 100%;
    margin-bottom: 7px;
    margin-left: 0%;
    padding-left: 0%;
    font-weight: bold;
    border: 1px, rgb(146, 146, 146);
}

.strike, .del {
    float: right;
    font-size: 0.7em;
    font-weight: bolder;
    padding:5px;
    width:3em;
    height:2.25em;
    border: 0;
    background-color: rgb(85, 84, 84);
}
.strike::-moz-focus-inner { border: 0; }

input[type=submit]::-moz-focus-inner { border: 0; }

.strike:hover {
    background-color: rgba(67, 184, 67, 0.472);
}
.strike:active {
    background-color: rgba(49, 141, 49, 0.472);;
}
.del:hover {
    background-color: rgba(233, 80, 80, 0.431);
}
.del:active {
    background-color: rgba(184, 63, 63, 0.431);
}

@media (max-width: 700px){
    #container {
        width: auto;
        max-width: 90%;
    }      
}