:root {
    --primary: white;
    --background: dodgerblue;
    --borders: white;
}

body {
    background-color: var(--background);
}

div:first-child {
    background-color: white;
    width: 280px;
    padding-right: 12px;
    padding-top: 0.8em;
    margin: auto;
    margin-top: 6em;
    box-shadow: 0 10px 50px lightblue;
    border-radius: 8px;
}

div:last-child {
    display: grid;
    max-width: 15em;
    padding-top: 0.5em;
    grid-template-columns: auto auto auto auto;
}

input[type="button"] {
    font-family: Inter, sans-serif;
    font-size: 20px;
    padding: 1.5rem 1.8rem;
    border: 0.5px solid var(--borders);
    background: var(--primary);
    transition: 100ms ease-in;
    border-radius: 5px;
}

input[type="button"]:active {
    background: dodgerblue;
    color: white;
}

.grey {
    color: rgb(116, 116, 116);
    font-size: 20px;
}

.equals {
    background-color: dodgerblue;
    color: var(--primary);
    border-radius: 50%;
    padding: 0;
    height: 50px;
    width: 50px;
    position: relative;
    right: -0.3rem;
    top: 0.9rem;
    box-shadow: 0 0 15px dodgerblue;
    border: none;
    transition: 100ms ease-in;
}

.equals:active {
    color: black;
    background-color: lightblue;
}

.input {
    font-size: 20px;
    padding: 10px;
    width: 91%;
    border: none;
    outline: none;
    position: relative;
    top: -10px;
    font-family: Inter, sans-serif;
    pointer-events: none;
    text-align: right;
}

.answer {
    float: right;
    font-size: 25px;
    padding-bottom: 0;
    font-family: Inter, sans-serif;
}

.clear {
    border: none;
    background-color: transparent;
    font-family: Inter;
    letter-spacing: 1px;
    color: dodgerblue;
    margin: 10px;
    border-radius: 20px;
    padding: 5px;
    width: 5em;
    transition: 100ms ease-in;
}

.clear:hover {
    background: rgba(30, 143, 255, 0.753);
    color: white;
    cursor: pointer;
}

.clear:focus {
    background: dodgerblue;
    color: white;
}