body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    background: #f5f5f5;
    padding: 20px;
}

h2 {
    margin-top: 0;
}

hr {
    margin: 20px 0;
}

.status-btn,
.pay-btn {
    padding: 6px 10px;
    margin: 4px;
    border: 1px solid #ccc;
    background: #eee;
    cursor: pointer;
}

.status-btn.active,
.pay-btn.active {
    background: #c8f7c5;
    border-color: #6abf69;
}