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

body::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    
    
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
}

.calculator {
    position: relative;
    z-index: 1; 
    background-color: rgba(37, 37, 44, 0.9);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.3);
    width: 300px;
    text-align: center;
}

#display {
    width: 95%;
    height: 50px;
    font-size: 24px;
    text-align: right;
    margin-bottom: 10px;
    padding: 15px;
    border: 1px solid #d11b1b;
    background-color: white;
    border-radius: 5px;
}

.buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

button {
    padding: 20px;
    font-size: 18px;
    border: 1px solid #ccc;
    border-radius: 5px;
    cursor: pointer;
    background-color: #f8f8f8;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #e0e0e0;
}