body {
    background-color: #f8f9fa;
}

.card {
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.revision-history {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid #dee2e6;
}

.revision-item {
    padding: 10px;
    margin-bottom: 10px;
    border-left: 3px solid #007bff;
    background-color: #f8f9fa;
}

.suggestions {
    background-color: #e9ecef;
    padding: 15px;
    margin-top: 10px;
    border-radius: 4px;
}

.diff-highlight {
    background-color: #fff3cd;
    padding: 2px;
    border-radius: 2px;
}

.grammar-error {
    text-decoration: wavy underline red;
    cursor: pointer;
}

.improvement-suggestion {
    text-decoration: wavy underline blue;
    cursor: pointer;
}

#emailBody {
    resize: vertical;
    min-height: 200px;
}