body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    color: #333;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.container {
    width: 90%;
    max-width: 600px;
    background-color: #fff;
    padding: 20px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
}

h1 {
    text-align: center;
    color: #333;
}

.word-display,
.word-input,
.submit-button,
.guess-button {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    border-radius: 4px;
}

.word-display {
    background-color: #e7e7e7;
    text-align: center;
    font-size: 1.2em;
}

.word-input {
    border: 1px solid #ddd;
}

.submit-button,
.guess-button {
    background-color: #5cb85c;
    color: white;
    border: none;
    cursor: pointer;
}

.submit-button:hover,
.guess-button:hover {
    background-color: #4cae4c;
}

.association-list {
    list-style-type: none;
    padding: 0;
}

.association-list li {
    background-color: #e7e7e7;
    margin: 5px 0;
    padding: 10px;
    border-radius: 4px;
}
.progress-display {
    text-align: center;
    font-size: 1em;
    margin-bottom: 10px;
}