body {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    background-color: #121212;
    color: #e0e0e0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.container {
    display: flex;
    justify-content: space-around;
    width: 80%;
    background-color: #1e1e1e;
    padding: 20px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.5);
    border-radius: 10px;
}

.card {
    width: 30%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.card h2 {
    text-align: center;
    color: #ff6f00;
    margin-bottom: 20px;
}

.card ul {
    list-style: none;
    padding: 0;
    width: 100%;
}

.card ul li {
    background-color: #2c2c2c;
    margin: 10px 0;
    padding: 10px;
    border-radius: 5px;
    text-align: center;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #e0e0e0;
    font-size: 20px;
    height: 50px;
    font-weight: bolder;
}

.card ul li.swap {
    font-size: 24px;
    padding: 0;
    background-color: transparent;
    box-shadow: none;
}

.card ul li.swap::before {
    content: '⇨';
    color: #ff6f00;
}