body {
    font-family: Arial, sans-serif;
    max-width: 800px;
    margin: 20px auto;
    padding: 0 20px;
}
.container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.input-group {
    display: flex;
    gap: 10px;
    align-items: center;
}
input[type="text"], select {
    flex: 1;
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
}
button {
    padding: 8px 16px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    white-space: nowrap;
}
button:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
}
button.disconnecting {
    background-color: #f44336;
}
.subscription-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}
#events {
    height: 300px;
    border: 1px solid #ccc;
    border-radius: 4px;
    padding: 10px;
    overflow-y: auto;
    background-color: #f9f9f9;
    font-family: monospace;
    white-space: pre-wrap;
}
.event-entry {
    margin-bottom: 10px;
    padding: 8px;
    background-color: white;
    border: 1px solid #eee;
    border-radius: 4px;
}
.timestamp {
    color: #666;
    font-size: 0.9em;
}
.address-inputs {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.subscribed {
    background-color: #f44336;
}