body {
    font-family: "Noto Sans KR", sans-serif;
    line-height: 1.6;
    background-color: #f8f9fa;
    margin: 0;
    padding: 0;
}

.header {
    background-color: #003366;
    color: white;
    padding: 20px;
    text-align: center;
}

.nav {
    background: #e9ecef;
    border-bottom: 1px solid #ccc;
}

.nav ul {
    list-style: none;
    padding: 10px 20px;
    margin: 0;
    display: flex;
    gap: 15px;
    justify-content: center;
}

.nav a {
    text-decoration: none;
    color: #333;
    font-weight: bold;
    transition: color 0.3s ease;
}

.nav a:hover {
    color: #007acc;
}

.content {
    padding: 30px;
}

.underline {
    text-decoration: underline;
}

.image, .audio, .table, .survey-link {
    margin: 30px auto;
    text-align: center;
}

.table {
    width: 80%;
    margin: 0 auto;
    border-collapse: collapse;
}

.table th, .table td {
    padding: 10px;
    border: 1px solid #999;
}

.survey-link {
    padding: 40px;
    background-color: #e6f0ff;
    margin-top: 50px;
    border-top: 2px solid #ccc;
}

.survey-link .survey-button {
    padding: 12px 25px;
    background-color: #007acc;
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-weight: bold;
    transition: background-color 0.3s ease;
}

.survey-link .survey-button:hover {
    background-color: #005fa3;
}