@import url('https://fonts.googleapis.com/css2?family=Noto+Sans:ital@1&family=Roboto+Mono:ital@1&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Noto Sans', sans-serif;
}

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

.calculator {
    border: 2px solid #717377;
    padding: 20px;
    border-radius: 15px;
    background: transparent;
    box-shadow: 0px 3px 15px rgba(113, 115, 119, 0.5);
}

input {
    width: 320px;
    border: none;
    padding: 10px;
    margin: 10px;
    background: transparent;
    box-shadow: 0px 3px 15px rgba(84, 84, 84, 0.5);
    font-size: 30px;
    text-align: right;
    cursor: pointer;
    color: white;
}

input::placeholder {
    color: white;
}

button {
    border: none;
    width: 60px;
    height: 50px;
    margin: 10px;
    border-radius: 50%;          
    background: transparent;
    color: white;
    font-size: 25px;
    box-shadow: 2px 3px 5px rgb(255, 255, 255, 0.2);
    cursor: pointer;
}

.equalbtn {
    background-color: rgb(255, 166, 0);
}

.acbtn {
    color: green;
}

.delbtn {
    color: green;
}

.opr {
    background-color: white;
    color: black;
}