@media screen and (max-height: 640px) {
    .container.container-single{
        padding-top: 3px !important;
    }
}
#gamebox {
    background-color: #161c1c;
    border: 2px solid #313131;
    padding: 5px;
    position: relative;
}
.memory-block {
    background-color: #333;
    margin: 5px;
    display: inline-block;
    text-align: center;
    vertical-align: middle;
    cursor: pointer;
}
#gameover {
     position: absolute;
     display: none;
     left: 2px;
     top: 2px;
     text-align: center;
     font-style: italic;
     font-weight: 900;
     color: #e7ffe8;
     background-color: rgba(22, 28, 28, 0.95);
}
#gameover p{
    font-size: 28px;
    padding-top: 120px;
}
#tryagainbtn, #nextlevelbtn, #resetbtn {
    font-size: 20px;
    margin-top: 30px;
    border-radius: 15px;
}
#tryagainbtn {
    margin-right: 5px;
}
#resetbtn {
    margin-left: 5px;
}