body {
    font-family: 'Poppins', sans-serif;
    background-color: #e0e0e0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 140vh;
    margin: 0;
}

.container {
    background-color: #f0f0f0;
    border-radius: 20px;
    padding: 30px;
    box-shadow: 5px 5px 15px #a0a0a0, -5px -5px 15px #ffffff;
    text-align: center;
    width: 400px;
}

h1, h2 {
    margin-bottom: 20px;
    color: #3d3d3d;
}

.currency-switch {
    margin-bottom: 30px;
}

.calculator {
    display: flex;
    justify-content: space-between;
}

.column {
    width: 45%;
}

.denomination {
    margin-bottom: 15px;
    text-align: left;
}

.input-group {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #e0e0e0;
    padding: 5px;
    border-radius: 10px;
    box-shadow: inset 5px 5px 10px #bebebe, inset -5px -5px 10px #ffffff;
}

input[type="number"] {
    width: 50px;
    text-align: center;
    border: none;
    outline: none;
    background-color: transparent;
    font-size: 1rem;
    color: #333333;
}

button {
    background-color: transparent;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    color: #333333;
}

.calculate-btn {
    margin-top: 20px;
    padding: 10px 20px;
    font-size: 1rem;
    border-radius: 20px;
    background-color: #e0e0e0;
    box-shadow: 5px 5px 15px #a0a0a0, -5px -5px 15px #ffffff;
    cursor: pointer;
    border: none;
    color: #333333;
}

.calculate-btn:hover {
    background-color: #d0d0d0;
}

.result {
    margin-top: 20px;
    font-size: 1.2rem;
    color: #333333;
}