body {
    margin: 0;
    padding: 0;
    font-family: 'Poppins', sans-serif;
    box-sizing: border-box;
}

.container {
    width: 100%;
    height: 100vh;
    background: linear-gradient(135deg, rgb(200, 180, 255), rgb(102, 25, 150));
    display: flex;
    align-items: center;
    justify-content: center;
}

.calculator {
    background: rgb(102, 25, 150);
    padding: 20px;
    border-radius: 10px;
}

.calculator form input {
    border: 0;
    outline: 0;
    width: 60px;
    height: 60px;
    border-radius: 10px;
    box-shadow: -8px -8px 15px rgba(255, 255, 255, 0.1), 5px 5px 15px rgba(0, 0, 0, 0.2);
    background: transparent;
    font-size: 20px;
    color: white;
    cursor: pointer;
    margin: 3px;
    transition: all 0.15s ease-in-out;
}

/* Display box style - no hover */
form .display {
    display: flex;
    justify-content: flex-end;
    margin: 20px 0;
}

form .display input {
    text-align: right;
    flex: 1;
    font-size: 45px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 10px;
    box-shadow: none;
    cursor: default;
}

/* Hover only on buttons */
.calculator form input[type="button"]:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: scale(1.05);
}

/* '=' button */
form input.equal {
    width: 130px;
}

form input[type="button"]:hover {
    background: rgba(0, 255, 255, 0.2);
    color: aquamarine;
    box-shadow: 0 0 10px aqua, 0 0 15px aqua;
    transform: scale(1.00);
}

form input[type="button"]:focus,
form input[type="button"]:active {
    box-shadow: none;
    outline: none;
}

/* Operator buttons */
form input.operator {
    color: aqua;
}