*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    color: #ebebeb;
    font-weight: bolder;
}

body{
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    background-color: cyan;
    background-image: url("background.jpg");
    object-fit: cover;
    background-position: center;
    background-repeat: no-repeat;
    /* background-size: 100% 100%; */
    height: 100vh;
}


.red{
    background-color: red;
}

#num{
    background-color: #00000000;
    border: none;
    font-size: 6vh;
    width: 100%;
    padding: 5%;
    text-align: right;
    border-style: none;
    color: rgb(203, 203, 203);
}

#num:active, #num:focus{
    outline: none;
}
.row{
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    justify-items: center;
    align-items: center;
    gap: 0.8vw;
    padding: 0.5rem;
}

.enter{
    grid-column: 4 / 5;
    grid-row: 3 / span 3;
    height: 100% !important;
}

.spl{
    background-color: lightgray !important;
    color: dimgray;
}

.spl:hover,.enter:hover{
    font-size: 3vw;
    background-color:red !important;
    color: aliceblue;
    border: 2px solid whitesmoke !important;
    box-shadow: rgba(50, 50, 93, 0.25) 0px 13px 27px -5px, rgba(0, 0, 0, 0.3) 0px 8px 16px -8px;
}

#btn{
    width: 8vh;
    height: 8vh;
    border-radius: 5rem;
    border: none;
    font-size: 2.3vh;
    background-color: dimgray;
    transition: font 0.2s ease-in-out;
}

#btn:hover{
    border: 2px solid rgb(255, 0, 0);
    font-size: 3vh;
    cursor: pointer;
    background-color:rgb(236, 177, 177);
    color: aliceblue;
    box-shadow: rgba(50, 50, 93, 0.25) 0px 13px 27px -5px, rgba(0, 0, 0, 0.3) 0px 8px 16px -8px;
}

.main{
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(5px);
    background-color: rgba(255, 255, 255, 0.2);  
    width: 45vh;
    border-radius: 0.5rem;
    overflow: hidden;
    box-shadow: rgba(255, 255, 255, 0.1) 0px 1px 1px 0px inset, rgba(50, 50, 93, 0.25) 0px 50px 100px -20px, rgba(0, 0, 0, 0.3) 0px 30px 60px -30px;
    /* padding: 0.4rem; */
}