body {
    background-color: #111;
    color: #f5f5f5;
    font-family: 'Courier New', Courier, monospace;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.container {
    text-align: center;
    max-width: 600px;
    padding: 2em;
    border: 1px solid #444;
    background-color: #222;
    box-shadow: 0 0 20px rgba(0,0,0,0.6);
}

h1 {
    font-size: 3em;
    margin-bottom: 0.3em;
    color: #ff4c4c;
}

p {
    margin: 0.5em 0;
}

.cost {
    color: #ffcc00;
}

.final {
    font-weight: bold;
    color: #ccc;
    margin-top: 1.5em;
}