@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;600;700&display=swap');

:root {
    --primary-color:rgb(32, 32, 32);
    --primary-color-darker: rgb(36, 36, 36);
    --primary-color-active: rgb(124, 124, 124);
}

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

body {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    background-color: var(--primary-color);
    font-family: 'Fira Code', monospace;
    font-size: 1.3em;
    line-height: 1.5em;
}

.container {
    max-width: 640px;
    max-height: 600px;
    margin: 50px auto;
    background: #fff;
    padding: 20px;
    border-radius: 10px;
    overflow-x: hidden;
    overflow-y: hidden;
}


form label, form button{
    display: block;
    width: 100%;
    margin-bottom: 10px;
    font-family: 'Fira Code', monospace;
}


p {
    text-align: right;
    display: block;
    width: 100%;
    margin-bottom: 10px;
    min-height: 80px;
    font-size: 50px;
    padding: 20px;
    border: solid var(--primary-color);
}

p:focus {
    outline: 1px solid var(--primary-color);
}

form button {
    margin: 0 auto;
    border: none;
    background: var(--primary-color);
    color: #fff;
    font-size: 18px;
    font-weight: 700;
    cursor: pointer;
}   

form button:hover {
    background: var(--primary-color-darker);
}

form button:active {
    background: var(--primary-color-active);
}

.grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    /* margin-right: -30px; */
}

.grid input {
    font-family: 'Fira Code', monospace;
    font-size: 20px;
    background: rgb(204, 204, 204);
    box-shadow: -6px -6px 9px #fff, 6px 6px 9px rgba(0, 0, 0, 0.4);
    min-height: 84px;
    margin: 5px;
    margin-bottom: .5rem;
    border: ridge;
    border-radius: 25px;
    cursor: pointer;
}
    
.grid input:hover, .grid input:active {
    background-color: rgb(184, 184, 184);
}

.grid input:active {
    box-shadow: inset -6px -6px 9px #fff, inset 6px 6px 9px rgba(0, 0, 0, 0.4);;
}

.grid .operador{
    color: #ff652f;
    font-weight: 700;
}