body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #343a40;
    color: #fff;
}
h2{
    text-align: center;
    color: #fff;
    padding-top: 50px;

}
#calculator {
    width: 300px;
    margin: 50px auto;
    padding: 20px;
    background-color: #212529;
    border-radius: 15px;
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.1);
}

#display {
    width: calc(100% - 40px);
    margin-bottom: 20px;
    padding: 15px;
    font-size: 24px;
    background-color: #495057;
    border: 2px solid #343a40;
    border-radius: 10px;
    color: #fff;
    text-align: right;
    box-sizing: border-box;
}

#memory-display-oop {
    width: calc(100%);
    margin-bottom: 20px;
    padding: 50px;
    font-size: 24px;
    background-color: #495057;
    border: 2px solid #343a40;
    border-radius: 10px;
    color: #fff;
    text-align: left;
    box-sizing: border-box;
    margin-top: 20px;
    overflow-y: auto; /* Enable vertical scrollbar if content overflows */
    max-height: 200px; /* Set maximum height to enable scrolling */
}
#memory-display-rpn {
    width: calc(100%);
    margin-bottom: 20px;
    padding: 50px;
    font-size: 24px;
    background-color: #495057;
    border: 2px solid #343a40;
    border-radius: 10px;
    color: #fff;
    text-align: left;
    box-sizing: border-box;
    margin-top: 20px;
    overflow-y: auto; /* Enable vertical scrollbar if content overflows */
    max-height: 200px; /* Set maximum height to enable scrolling */
}

#memory-display-infix {
    width: calc(100%);
    margin-bottom: 20px;
    padding: 50px;
    font-size: 24px;
    background-color: #495057;
    border: 2px solid #343a40;
    border-radius: 10px;
    color: #fff;
    text-align: left;
    box-sizing: border-box;
    margin-top: 20px;
    overflow-y: auto; /* Enable vertical scrollbar if content overflows */
    max-height: 200px; /* Set maximum height to enable scrolling */
}

.calculator-buttons {
    display: grid;
    grid-template-columns: repeat(3, 1fr); /* Three columns */
    grid-auto-rows: minmax(50px, auto); /* Automatically adjust row height */
    gap: 5px; /* Gap between buttons */
}

#buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-gap: 15px;
}

button {
    padding: 15px; /* Adjust padding as needed */
    font-size: 18px;
    border: none;
    border-radius: 5px;
    background-color: #212529;
    color: #fff;
    cursor: pointer;
    transition: background-color 0.3s, color 0.3s;
}

button:hover {
    background-color: #343a40;
}

#infix-display,
#rpn-display,
#stack-display,
#oop-display {
    width: calc(100%);
    margin-bottom: 20px;
    padding: 15px;
    font-size: 24px;
    background-color: #212529;
    border: 2px solid #343a40;
    border-radius: 10px;
    color: #fff;
    text-align: center; /* Center-align the content */
    display: grid; /* Use grid layout */
    grid-template-columns: repeat(3, 1fr); /* 3 columns */
    grid-template-rows: repeat(3, auto); /* 3 rows */
    gap: 5px; /* Gap between cells */
    box-sizing: border-box;
}