body {
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-color: rgba(47, 175, 175, 0.62);
    font-weight: 700;
    font-family: 'Tillana', cursive;
    text-align: center;
    color: rgb(25, 35, 44);
}

.container {
    height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

form {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: fit-content;
    height: fit-content;
    border-radius: 50px;
    background-color: rgb(25, 35, 44);
    padding: 4%;
    box-shadow: 30px 30px 50px rgba(62, 59, 59, 0.733);
    border: 0px;
}

#display {
    width: 300px;
    margin: 15px 0px;
    border-radius: 20px;
    border: 0px;
    background-color: rgb(89, 94, 99);
    /*box-shadow: 5px 5px 10px rgba(49, 67, 79, 0.844);*/
    font-size: 50px;
    font-weight: 700;
    font-family: 'Tillana', cursive;
    color: rgb(20, 20, 20);
}

.btn {
    height: 60px;
    width: 60px;
    padding: 3%;
    margin: 8px;
    font-size: 30px;
    font-weight: 700;
    font-family: 'Tillana', cursive;
    color: aquamarine;
    background-color: rgba(63, 65, 65, 0.542);
    border-radius: 20%;
    border: 0px;
    box-shadow: -2px -2px 5px #35444484, 5px 5px 15px rgba(46, 64, 78, 0.671);
}

.btn:hover {
    background-color: aquamarine;
    color: darkslategray;
}

form .screen {
    display: flex;
    justify-content: flex-end;
}

form .screen input {
    text-align: right;
}

footer {
    color: rgb(25, 35, 44);
    font-weight: 700;
    font-family: 'Tillana', cursive;
    text-align: center;
}

i {
    color: #f44336;
    font-size: 1.5rem;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.1);
    }

    100% {
        transform: scale(1);
    }
}