body {
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, #ff6f61, #d991a3, #73a857, #ffc857, #06aed5, #086788);
    color: #333;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 800px;
    margin: 20px auto;
    padding: 20px;
    background-color: #f3f4f6;
    border-radius: 10px;
}

.header {
    text-align: center;
    margin-bottom: 50px;
}

.table-of-contents {
    list-style: none;
    padding: 0;
    margin: 20px 0;
}

.table-of-contents li {
    margin: 10px 0;
}

.table-of-contents a {
    text-decoration: none;
    color: #333;
}

.section {
    margin-bottom: 40px;
}

.section h2 {
    border-bottom: 2px solid #ddd;
    padding-bottom: 10px;
}

.section img {
    max-width: 100%;
    display: block;
    margin: 20px 0;
}

.test-link {
    text-align: center;
    margin: 40px 0;
}

.test-link a {
    display: inline-block;
    padding: 10px 20px;
    background-color: #333;
    color: #fff;
    text-decoration: none;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.test-link a:hover {
    background-color: #555;
}

.smile-animation {
    font-size: 50px;
    text-align: center;
    animation: smile 1s infinite alternate;
}

@keyframes smile {
    0% {
        transform: scale(1);
    }
    100% {
        transform: scale(1.2);
    }
}