style.css

body{
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    background-color: rgba(255, 255, 255, 0.885);
    background-image: url(img1.avif);
    margin: 0;
}

.main-navbar {
    background-color: rgba(14, 198, 158, 0.8);
    height: 70px;
    padding-left: 10px;
    text-align: left;
    overflow: hidden;
    color: white;
    width: 100%;
    font-size: 18px;
}

.Calculator{
    display: flex;
    justify-content: center;
    flex-direction: column;
    border: 2px solid rgba(0, 0, 0, 0.8);
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    background: rgba(0, 0, 0, 0.7);
}

.display{
    height: 80px;
    text-align: right;
    padding: 10px;
    font-size: 2.5em;
    border: 2px solid rgba(255, 255, 255, 0.849);
    margin-bottom: 10px;
}

.buttons{
    display: grid;
    grid-template-columns: repeat(6, 10fr);
    gap: 12px;
}

.button{
    padding: 20px;
    font-size: 1.2em;
    cursor: pointer;
    background: #eee;
    border: none;
    border-radius: 5px;
    box-shadow: 0 2px #ddd;
}

.button:active{
    box-shadow: none;
    position: relative;
    top: 2px;
}

.button.special{
    background: #dfe6e9;
}

#b1, #b2, #b3{
    background: rgb(251, 165, 7);
}

#o1, #o2, #o3, #o4, #o5, #b1{
    font-size: 30px;
}

.button:hover{
    background-color: rgb(117, 209, 245);
}

#b1:hover, #b2:hover, #b3:hover{
   background-color: rgb(251, 89, 30);
}

.footer{
    left: 0;
    bottom: 0;
    width: 100%;
    background-color: #333;
    color: white;
    text-align: center;
    overflow: hidden;
}