.lesson-select-container {
    max-width: 800px;
    margin: 20px auto;
    padding: 20px;
    background: #f9f9f9;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.lesson-select-container h3 {
    color: #333;
    margin-bottom: 20px;
    text-align: center;
    font-size: 1.5em;
}

.lesson-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 20px;
    justify-content: flex-start;
}

.lesson-button {
    background: #0073aa;
    color: white;
    border: none;
    padding: 15px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    transition: all 0.3s ease;
    text-align: center;
    min-width: 150px;
}

.lesson-button:hover {
    background: #005177;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.lesson-button:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.lesson-select-error {
    background: #f8d7da;
    color: #721c24;
    padding: 15px;
    border-radius: 5px;
    border: 1px solid #f5c6cb;
    margin: 20px 0;
}

.lesson-select-info {
    background: #d1ecf1;
    color: #0c5460;
    padding: 15px;
    border-radius: 5px;
    border: 1px solid #bee5eb;
    margin: 20px 0;
}

@media (max-width: 600px) {
    .lesson-buttons {
        grid-template-columns: 1fr;
    }
    
    .lesson-select-container {
        margin: 10px;
        padding: 15px;
    }
}