body {
    transition: background-color 0.3s;
}
body.dark-mode {
    background-color: #1e1e1e;
    color: #e0e0e0;
}

button {
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 6px;
    transition: background-color 0.2s;
}
button:hover {
    background-color: #0056b3;
}
button:active {
    transform: translateY(1px);
}

#log {
    font-family: 'Courier New', monospace;
    font-size: 14px;
    color: #333;
    border: 1px solid #ddd;
}
body.dark-mode #log {
    background-color: #2d2d2d;
    color: #a9b7c6;
    border-color: #444;
}

.status-ok { color: green; }
.status-err { color: red; }