nav {
    margin-top: 40px;
}

.link-section {
    margin-bottom: 40px;
    padding: 25px;
    border: 2px solid #000;
    background-color: #fff;
}

.link-section h2 {
    font-size: 30px;
    margin-bottom: 15px;
    font-weight: bold;
}

.link-section a {
    display: block;
    color: #000;
    text-decoration: underline;
    font-size: 22px;
    padding: 15px 0;
    word-wrap: break-word;
    line-height: 1.6;
}

.link-section p {
    font-size: 20px;
    color: #333;
    margin-top: 10px;
    line-height: 1.6;
}

.settings-btn {
    position: absolute;
    top: 30px;
    right: 25px;
    width: 60px;
    height: 74px;
    background-color: #fff;
    border: 2px solid #000;
    font-size: 28px;
    cursor: pointer;
    text-align: center;
    line-height: 56px;
}

.settings-btn:active {
    background-color: #eee;
}

.settings-page {
    display: none;
}

.settings-page.visible {
    display: block;
}

.main-page {
    display: block;
}

.main-page.hidden {
    display: none;
}

.back-btn {
    display: inline-block;
    padding: 15px 30px;
    background-color: #fff;
    border: 2px solid #000;
    font-size: 22px;
    cursor: pointer;
    margin-bottom: 30px;
}

.back-btn:active {
    background-color: #eee;
}

.settings-section {
    margin-bottom: 40px;
    padding: 25px;
    border: 3px solid #000;
    background-color: #fff;
}

.settings-section h2 {
    font-size: 30px;
    margin-bottom: 20px;
    font-weight: bold;
}

.test-item {
    margin-bottom: 20px;
    padding: 15px;
    border: 1px solid #333;
}

.test-label {
    font-size: 22px;
    font-weight: bold;
    margin-bottom: 10px;
}

.test-status {
    font-size: 18px;
    margin-top: 10px;
}

.status-ok {
    color: #000;
}

.status-error {
    color: #666;
}

.status-loading {
    color: #666;
}