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

body {
    font-family: Arial, Helvetica, sans-serif;
    background: #74ebd5;  /* fallback for old browsers */
    background: -webkit-linear-gradient(to right, #ACB6E5, #74ebd5);  /* Chrome 10-25, Safari 5.1-6 */
    background: linear-gradient(to right, #ACB6E5, #74ebd5); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    background-color: aliceblue;
    padding: 10px;
    border: 1px solid rgb(190, 187, 187);
    border-radius: 10px;
    box-shadow: 0px 0px 10px 1px rgb(184, 180, 180);
}

h2 {
    margin-bottom: 20px;
}

.input-div {
    font-family: Arial, Helvetica, sans-serif;
    display: flex;
    justify-content: end;
    align-items: center;
    padding-right: 10px;
    font-size: 35px;
    background-color: rgb(245, 245, 245);
    margin-bottom: 15px;
    width: 100%;
    height: 65px;
    border-radius: 5px;
    border: 1px solid rgb(190, 187, 187);
}

button {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    padding: 20px;
    width: 70px;
    height: 70px;
    border-radius: 5px;
    border: 1px solid black;
    cursor: pointer;
}

#mult {
    padding-bottom: 5px;
}

.digit {
    background-color: #1E90FF;
    color: white;
    /* border-color: #1E90FF; */
}

.digit:hover {
    background-color: #1770c9;
}

button:active {
    box-shadow: 0px 0px 10px 1px rgb(184, 180, 180);
}

.signs {
    color: white;
    background-color:#27c427;
}

.signs:hover {
    background-color:#1e9a1e;
}

#cletter {
    background-color: orange;
}

#cletter:hover {
    background-color: rgb(193, 126, 2);
}

#equal {
    color: white;
    background-color: rgb(240, 35, 35);
}

#equal:hover {
    background-color: rgb(192, 28, 28);
}
#buttons {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    grid-template-rows: 1fr 1fr 1fr 1fr;
    gap: 8px;
}