@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@500&display=swap');

::after,
::before,
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Poppins", serif;
}

body {
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(45deg, #0a0a0a, #3a4452);
}

.calculator {
    border: 1px solid #717377;
    padding: 20px;
    border-radius: 15px;
    background: none;
    box-shadow: 0px 3px 15px rgba(113, 115, 119, 0.5);
}

input {
    width: 320px;
    border: none;
    padding: 24px;
    margin: 10px;
    background: transparent;
    color: #fff;
    box-shadow: 0px 3px 15px rgba(0, 0, 0, 0.752);
    font-size: 40px;
    text-align: right;
    cursor: pointer;
}

input::placeholder {
    color: #fff;
}

button {
    border: none;
    width: 60px;
    height: 60px;
    margin: 10px;
    border-radius: 50%;
    background: transparent;
    color: #fff;
    font-size: 20px;
    box-shadow: -5px 7px 11px rgba(0, 0, 0, 0.784);
    cursor: pointer;
}

button:active {
    background-color: hsla(0, 0%, 0%, 0.285);
}

.equal-btn {
    background: #fb7c14;
}

.equal-btn:active {
    background: #f88a30;
}

.operat {
    color: #fb7c14;
}