{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    background-color: #f8f9fa;
    color: #333;
    line-height: 1.8;
    padding: 20px;
}

h1, h2, h3 {
    color: #0077b6;
    margin-bottom: 10px;
    text-align: center;
}

p {
    margin-bottom: 15px;
    font-size: 16px;
}

img {
    display: block;
    max-width: 100%;
    height: auto;
    margin: 15px auto;
    border-radius: 10px;
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.2);
}

a {
    color: #ff5722;
    text-decoration: none;
}
a:hover {
    color: #e63946;
}

.topic {
    background-color: #fff;
    border: 1px solid #ddd;
    padding: 15px;
    margin: 20px 0;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

button {
    background-color: #0077b6;
    color: #fff;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    transition: 0.3s;
}
button:hover {
    background-color: #023e8a;
}