mem.css

* {
    user-select: none;
}
:root {
    --main-color:#4caf50;
}
body {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
    height: 100vh;
    background-image: linear-gradient(to bottom,#ECE9E6,#FFFFFF);
    display: flex;
    justify-content: center;
    align-items: center;
}
.container {
    padding-left: 15px;
    padding-right: 15px;
    margin-left: auto;
    margin-right: auto;
}
@media (max-width:375px) {
    .container {
        width:300px;
    }
} 
@media (min-width:376px) and (max-width:575px) {
    .container {
        width: 350px;
    }
}
@media (min-width:576px)  and (max-width:767px)  {
    .container {
        width: 700px;
    }
}
@media (min-width:768px) and (max-width:991px) { 
    .container {
        width:970px;
    }
}
@media (min-width:1200px) {
    .container {
        width: 1170px;
    }
}
.option {
    width: 50%;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    border-radius: 10px;
    width: fit-content;
    background-color: white;
    margin: 150px auto;
}
.option h1 {
    width: fit-content;
    font-size: 30px;
    margin: 15px auto;
    font-weight: bold;
    color: var(--main-color);
}
.sidebar {
    position: absolute;
    top: 0;
    left: 0;
    width: 97%;
    display: none;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    background-color: #fafafa;
}
.sidebar .hint , .sidebar .move ,
.sidebar .time {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    padding: 10px;
}
.sidebar span  {
    color: var(--main-color);
    font-weight: bold;
    font-size: 20px;
}
.sidebar i {
    font-size: 25px;
    font-weight: bold;
    color: #000000cf;
    cursor: pointer;
}
.lvl {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.lvl h3 {
    width: fit-content;
    margin: 0px;
    padding-bottom: 10px;
    font-size: 30px;
    font-weight: bold;
}
.lvl span {
    font-size: 18px;
    cursor: pointer;
    transition: 0.3s;
}
.lvl span:hover ,
.selected {
    color: var(--main-color);
}
button {
    width: fit-content;
    padding: 10px 100px;
    margin: 20px auto;
    background: var(--main-color);
    border: none;
    border-radius: 6px;
    font-size: 17px;
    color: white;
    cursor: pointer;
}
.shape {
    perspective: 1000px;
    grid-template-columns: repeat(4,100px);
    gap: 5px;
    margin: 130px auto 80px;
    display: none;
}
.Easy {
    grid-template-columns: repeat(3,100px);
}
.box {
    position: relative;
    width: 100%;
    height: 110px;
    transform-style: preserve-3d;
    transition: transform 0.3s ease-in;
}
.box .front ,
.box .back {
    border-radius: 10px;
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
}
.box .front {
    background: linear-gradient(to bottom right , #DD95f7 0%,#9aadf9 50%,#7fc9d9 100%);
}
.box .back {
    background-color: white;
    transform: rotateY(180deg);
    font-size: 70px;
    display: flex;
    justify-content: center;
    align-items: center;
}
.dog {
    color: #947867;
}
.moon {
    color: #2196F3;
}
.cup {
    color: #6f4e37;
}
.prize ,.spike {
    color: rgba(240, 240, 15, 0.912);
}
.face {
    color: bisque;
}
.apple {
    color:#4CBB17;
}
.rotate {
    transform: rotateY(-180deg);
}
.hide {
    display: none;
}

.win-message,.lose-message  {
    font-size: 70px;
    font-weight: bold;
}
.win-message {
    color: var(--main-color);
}
.lose-message {
    color: rgba(255, 0, 0, 0.808);
}
@media (max-width:767px) {
    .shape {
        grid-template-columns: repeat(4,80px);
    }
    .Easy {
        grid-template-columns: repeat(3,80px);
    }
    .box {
        height: 90px;
    }
    .box .back {
        font-size: 55px;
    }
    .sidebar {
        width: 97.3%;
        padding: 0 7px;
    }
    .sidebar .hint , .sidebar .move ,
    .sidebar .time {
        padding: 5px;
    }
    .sidebar p {
        font-size: 15px;
        width: max-content;
    }
    .sidebar .hint i {
        font-size: 21px;
    }
    .sidebar span {
        font-size: 18px;
    }
    .win-message,.lose-message {
        font-size: 45px;
    }
} 
@media (max-width:576px) {
    .box {
        height: 80px;
    }
    .shape {
        grid-template-columns: repeat(4,70px);
    }
    .Easy {
        grid-template-columns: repeat(3,70px);
    }
}