style.css

/* Reset default margins and padding */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #121212; /* Dark background */
    font-family: 'Arial', sans-serif;
}

div {
    width: 320px;
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0px 4px 20px rgba(0, 0, 0, 0.5);
    background-color: #1e1e1e; /* Slightly lighter background for the calculator */
}

input[type="text"] {
    width: 100%;
    padding: 20px;
    font-size: 28px;
    color: #ffffff; /* White text color */
    background-color: #424242; /* Input background */
    border: none;
    border-radius: 10px;
    margin-bottom: 10px;
    text-align: right;
    outline: none;
}

h5 {
    color: #ff9800; /* Orange color for the answer text */
    text-align: center;
    margin: 10px 0;
}

table {
    width: 100%;
    border-collapse: collapse;
}

input[type="button"] {
    width: 100%;
    padding: 20px;
    font-size: 20px;
    color: #ffffff; 
    background-color: #ff5722; 
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
}

input[type="button"]:hover {
    background-color: #e64a19; 
    transform: scale(1.05);
}

input[value="AC"],
input[value="+/-"],
input[value="%"] {
    background-color: #ff9800; 
}

input[value="/"],
input[value="x"],
input[value="-"],
input[value="+"] {
    background-color: #f57c00; 
}

input[value="="] {
    background-color: #ffb74d; 
}

input[value="00"],
input[value="0"],
input[value="."] {
    background-color: #ff5722; 
}