body {
    font-family: Arial, sans-serif;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    display: flex;
    gap: 20px;
}

.main-content {
    flex: 1;
}

.class1 {
    background-color: #e3f2fd;
    padding: 10px;
    margin: 5px 0;
    border-radius: 5px;
}

.class2 {
    background-color: #fff3e0;
    padding: 10px;
    margin: 5px 0;
    border-radius: 5px;
}

button {
    padding: 10px 20px;
    margin: 10px 5px;
    font-size: 16px;
    cursor: pointer;
    border: none;
    border-radius: 5px;
    background-color: #4CAF50;
    color: white;
}

button:hover {
    background-color: #45a049;
}

button:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
}

#phrases-container {
    margin-top: 20px;
}

.phrase-item {
    padding: 10px;
    margin: 5px 0;
    border-radius: 5px;
}

.phrase-item.bold {
    font-weight: bold;
}

aside {
    width: 300px;
    padding: 20px;
    background-color: #f5f5f5;
    border-radius: 5px;
    height: fit-content;
}

aside ol {
    padding-left: 20px;
}

aside ol ul {
    padding-left: 20px;
    margin-top: 5px;
    list-style-type: disc;
}