/* Header section styles */
.header-section {
    background: white;
    padding: 30px;
    border: 2px solid black;
    border-radius: 8px;
    margin-bottom: 30px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.main-title {
    font-size: 36px;
    font-weight: bold;
    color: black;
    margin-bottom: 5px;
}

.main-subtitle {
    font-size: 24px;
    font-weight: 600;
    color: #666;
    margin-bottom: 20px;
}

.explanation {
    font-size: 16px;
    line-height: 1.8;
    color: #333;
    text-align: left;
    max-width: 900px;
    margin: 0 auto;
}

.explanation em {
    color: #666;
    font-size: 14px;
    display: block;
    margin-top: 10px;
}