body {
    font-family: Arial, sans-serif;
    margin: 20px;
    background-color: #f4f4f4;
    color: #333;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

h1, h2, h3, h4 {
    color: #0056b3;
}

.input-section, .output-section, .prediction-section {
    margin-bottom: 30px;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    background-color: #f9f9f9;
}

.input-group {
    margin-bottom: 15px;
}

input[type="file"], textarea, input[type="number"], select {
    display: block;
    width: calc(100% - 22px);
    padding: 10px;
    margin-top: 5px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 1em;
}

button {
    background-color: #007bff;
    color: white;
    padding: 10px 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1em;
    margin-right: 10px;
}

button:hover {
    background-color: #0056b3;
}

#resetApp {
    background-color: #dc3545;
}

#resetApp:hover {
    background-color: #c82333;
}

.regression-model {
    margin-bottom: 15px;
    border-bottom: 1px dashed #eee;
    padding-bottom: 10px;
}

.regression-model:last-child {
    border-bottom: none;
}

p {
    margin: 5px 0;
}