style.css

body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #3a4764;
}

.calculator {
    background-color: #232c43;
    border-radius: 10px;
    padding: 20px;
    width: 300px;
}

h1 {
    color: white;
    margin-bottom: 20px;
}

.display {
    background-color: #182034;
    border-radius: 5px;
    margin-bottom: 20px;
    padding: 10px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

#result {
    width: 100%;
    border: none;
    background-color: transparent;
    color: white;
    font-size: 32px;
    text-align: right;
}

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

.key {
    background-color: #eae3dc;
    border: none;
    border-radius: 5px;
    color: #444b5a;
    font-size: 18px;
    padding: 10px;
    cursor: pointer;
}

.key:hover {
    background-color: #ffffff;
}

.func {
    background-color: #637097;
    color: white;
}

.equals {
    background-color: #d03f2f;
    color: white;
}

.wide {
    grid-column: span 2;
}