@import url("https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swap");

:root {
    --bg-col: #000014;
}

*{
    margin: 0;
    padding: 0;
    font-family: poppins, sans-serif;
    
}

html {
    background-color: black;
}

body {
    background-image: url(images/bg.jpg);
    background-position: center;
    background-repeat: no-repeat;
    background-size:cover;
    min-height: 100vh;
}

.main-heading {
    text-align: center;
    font-size: 40px;
    padding: 30px;
    color: white;
}

.calculator-body {
    padding: 10px 0;
    margin: 0 auto;
    width: 80vw;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.txt-box{
    background-color: #ffffff15;
    padding: 20px;
    border-radius: 30px;
    border: 2px solid white;
    transition: 0.4s ease;
    color: white;
    font-size: 24px;
}

.operations {
    display: flex;
    justify-content: space-between;
    align-items: center;
    /* flex-wrap: wrap; */
    gap: 30px;
}

.op-btn {
    margin: 30px 0;
    color: white;
    font-size: 3vmax;
    border: 2px solid white;
    border-radius: 30px;
    padding: 10px auto;
    width: 100%;
    background-color: #ffffff15;
    transition: 0.4s ease;
    box-shadow: 0 0 10px white;
    cursor: pointer;
}

.op-btn:hover {
    background-color: white;
    color: var(--bg-col);
    transform: scale(1.2);
}

.op-btn:active {
    transform: scale(0.9);
}

.clear-btn {
    margin: 30px 0;
    color: white;
    font-size: 60px;
    border: 2px solid white;
    border-radius: 30px;
    padding: 10px 70px;
    background-color: #ffffff15;
    transition: 0.4s ease;
    box-shadow: 0 0 10px white;
    cursor: pointer;
}

.clear-btn:hover {
    background-color: white;
    color: var(--bg-col);
}

.clear-btn:active {
    transform: scale(0.9);
}

.txt-box:focus {
    box-shadow: 0 0 10px white;
}

.res-box {
    margin: 30px 0;
    color: var(--bg-col);
    font-size: 45px;
    border: 2px solid white;
    border-radius: 30px;
    padding: 10px;
    background-color: white;
    box-shadow: 0 0 10px white;
    width: 100%;
}
.res-txt {
    margin: 30px 0;
    color: var(--bg-col);
    font-size: 45px;
    border: 2px solid white;
    border-radius: 30px;
    padding: 10px;
    background-color: white;
    box-shadow: 0 0 10px white;
    width: 20%;
    text-align: center;
}


.res {
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
}