body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    background-color: rgba(164, 151, 85, 0.436);
    height: 100vh;
    background: linear-gradient(to right, #6a11cb, #2575fc);
    color: white;
    margin: 0;
}

.calculator {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0px 4px 20px rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    width: 350px;
    margin-bottom: 20px;
    margin-top: 20px;
}

h2 {
    color: rgb(255, 255, 255);
    font-size: 36px;
    margin-left: 80px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.6);
}

.output {
    height: 50px;
    border: 2px solid #ffffff;
    background-color: rgba(255, 255, 255, 0.3);
    font-size: 24px;
    padding: 10px;
    text-align: right;
    border-radius: 8px;
    margin-bottom: 15px;
    color: #fff;
}

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

button {
    cursor: pointer;
    padding: 20px;
    font-size: 22px;
    border: none;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border-radius: 100px;
    margin-bottom: 10px;
    transition: all 0.3s ease-in-out;
}

button:hover {
    background: rgba(255, 255, 255, 0.4);
    transform: scale(1.1);
}

button:active {
    background: rgba(255, 255, 255, 0.6);
    transform: scale(1);
}