*{
    margin: 0;
    padding: 0;
    font-family: 'poppins', sans-serif;
    box-sizing: border-box;
}
.container{
    width: 100%;
    height: 100vh;
    background: #e3f9ff;
    display: flex;
    align-items: center;
    justify-content: center;
}
.calculator {
    background: #3a4452;
    border-radius: 10px;
    padding: 20px;
    opacity: 0;
    transform: scale(0.9);
    animation: fadeInScale 0.5s forwards;
}

@keyframes fadeInScale {
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.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: rgba(255, 255, 255, 0.05);
    font-size: 20px;
    color: #fff;
    margin: 10px;
    cursor: pointer;
    transition: all 0.2s ease; /* Smooth animation */
}
.calculator form input:active {
    transform: translateY(2px) scale(0.95);
    box-shadow: inset -2px -2px 5px rgba(255,255,255,0.2), inset 2px 2px 5px rgba(0,0,0,0.3);
}


.calculator form input:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: -5px -5px 10px rgba(255, 255, 255, 0.2), 5px 5px 10px rgba(0, 0, 0, 0.3);
    background: rgba(255, 255, 255, 0.1);
}

form .display{
    display: flex;
    justify-content: flex-end;
    margin: 20px 0;
}
form .display input {
    text-align: right;
    flex: 1;
    font-size: 45px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    border-radius: 10px;
    padding: 10px;
    transition: all 0.3s ease;
}

form .display input:focus {
    box-shadow: 0 0 15px #33ffd8;
}

form input.equal {
    width: 145px;
    background: linear-gradient(135deg, #ff5945, #ff836b); /* eye-catching gradient */
    color: #fff;
    font-weight: bold;
    font-size: 22px;
    border-radius: 12px;
    box-shadow: 0 5px 15px rgba(255, 89, 69, 0.5); /* soft shadow */
    transition: all 0.3s ease;
    cursor: pointer;
}

form input.equal:hover {
    background: linear-gradient(135deg, #ff836b, #ff9a81); /* lighter gradient on hover */
    transform: scale(1.08);
    box-shadow: 0 8px 20px rgba(255, 89, 69, 0.7); /* glow effect */
}

form input.equal:active {
    transform: scale(0.95);
    box-shadow: inset 0 4px 8px rgba(255,89,69,0.5);
}


form input.operator{
    color: #33ffd8;
}
form input.operator:hover {
    color: #00fff0;
    text-shadow: 0 0 8px #00fff0;
}


@media (max-width: 480px) {
    .calculator {
        width: 90%;
        padding: 20px;
    }

    .calculator form input {
        width: 55px;
        height: 55px;
        font-size: 18px;
        margin: 6px;
    }

    form .display input {
        font-size: 35px;
    }
}