style.css

*{
    margin: 0px;
    padding: 0px;
    font-size: 1.5em;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

.container{
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    padding-top: 20px;
}
.input-container{
    width: 97%;
}
.cal-field{
    width: fit-content;
    padding: 10px;
    border:0px solid;
    margin-top: 5px;
    border-radius: 5px;
    backdrop-filter:inherit;
    box-shadow: inset 0px 0px 12px 0px rgb(101 101 101);
}
.grid{
    width: inherit;
}
.grid div{
    margin: 5px;
    display: flex;
    justify-content: space-between;
    
}
button, input{
    padding: 25px;
    margin: 2px;
    font-size: large;
    align-self: flex-end;
    flex-grow: inherit;
}
input{
    direction: ltr;
    font-size: large;
    align-self: flex-start;
    border:0px solid;
    border-radius: 5px;
    outline: 0px;
    padding-left: 12px;
    width: 100%;
    box-shadow: inset 0px 0px 12px 0px rgb(101 101 101);
}

button{
    border:0px;
    box-shadow:  0px 0px 3px 0px rgb(101 101 101);
}
button:hover{
    background-color: rgb(116, 116, 116);
}

button:focus{
    box-shadow: inset 0px 0px 12px 0px rgb(101 101 101);
}
button.control{
    background: rgb(0, 153, 255);
}
button.control:hover{
    background-color: rgb(24, 121, 185);
}