body {
    background-color: #f0f2f5;
    font-family: Arial, sans-serif;
}

.app-container {
    max-width: 600px;
}

.app-title {
    color: #333;
    font-weight: bold;
}

.app-card {
    border-radius: 8px;
    border: 1px solid #ddd;
}

.form-check-label {
    font-weight: normal;
}

.start-button, .done-button {
    width: 100%;
    padding: 10px 15px;
    font-size: 1.2em;
    margin-top: 10px;
    margin-bottom: 10px;
}

.start-button {
    background-color: #007bff;
    border-color: #007bff;
}

.done-button {
    background-color: #28a745;
    border-color: #28a745;
}

.text-to-type {
    min-height: 80px;
    font-size: 1.3em;
    font-family: 'Courier New', Courier, monospace;
    background-color: #e9ecef;
    border-color: #ced4da;
    color: #495057;
    display: flex;
    align-items: center;
    justify-content: center;
}

.user-input {
    min-height: 80px;
    font-size: 1.2em;
    font-family: 'Courier New', Courier, monospace;
}

.feedback-img {
    width: 120px;
    height: 120px;
    object-fit: contain;
}

.feedback-area {
    background-color: #fefefe;
    padding: 20px;
    border-radius: 8px;
    border: 1px dashed #ced4da;
}

.feedback-separator {
    margin-top: 30px;
    margin-bottom: 30px;
}

.highlight-correct {
    background-color: #d4edda;
}

.highlight-incorrect {
    background-color: #f8d7da;
}

#phrase-display span {
    background-color: transparent;
    transition: background-color 0.1s;
    padding: 2px 0;
    border-radius: 3px;
}

#phrase-display span.correct {
    background-color: #d4edda;
}

#phrase-display span.incorrect {
    background-color: #f8d7da;
}