body {
    font-family: Arial, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    margin: 0;
   background-image: url(bgpicture.jpg);
    background-repeat: no-repeat;
    background-position: center;
   background-size: cover;
}

h2 {
    color: #a39d9d;
    margin-bottom: 20px;
    text-align: center;
}

#display {
    width: 212px; 
    height: 40px;
    font-size: 20px;
    text-align: right;
    padding: 5px;
    margin-bottom: 10px;
    border: 2px solid #ccc;
    border-radius: 5px;
    background-color: #fff;
    box-sizing: border-box;
}

.calculator-buttons {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.button-row {
    display: flex;
    justify-content: center;
    width: 100%;
}

button {
    width: 50px;
    height: 50px;
    margin: 5px;
    font-size: 18px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    background-color: #e0e0e0;
    transition: all 0.2s;
    box-shadow: 0 2px #999;
}

button:hover {
    background-color: #d0d0d0;
}

button:active {
    background-color: #b0b0b0;
    box-shadow: 0 1px #666;
    transform: translateY(1px);
}


button[onclick*="setOperator"] {
    background-color: #f5923e;
    color: white;
}

button[onclick*="setOperator"]:hover {
    background-color: #e4822e;
}

button[onclick*="setOperator"]:active {
    background-color: #d4721e;
}


button[onclick="clearDisplay()"] {
    background-color: #ff4444;
    color: white;
}

button[onclick="clearDisplay()"]:hover {
    background-color: #ee3333;
}

button[onclick="clearDisplay()"]:active {
    background-color: #dd2222;
}


button[onclick="calculate()"] {
    background-color: #4CAF50;
    color: white;
}

button[onclick="calculate()"]:hover {
    background-color: #3e9f42;
}

button[onclick="calculate()"]:active {
    background-color: #2e8f32;

}