body {
    font-family: Arial, sans-serif;
    margin: 0;
    background-color: #f4f8f3;
    line-height: 1.8;
}

header {
    background: #2e7d32;
    color: white;
    text-align: center;
    padding: 40px;
}

.container {
    max-width: 1100px;
    margin: auto;
    padding: 30px;
}

.topic {
    background: white;
    padding: 25px;
    margin-bottom: 25px;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
}

h2 {
    color: #1b5e20;
}

.read-btn {
    display: inline-block;
    margin-top: 15px;
    padding: 10px 20px;
    background-color: #2e7d32;
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-weight: bold;
    transition: 0.3s;
}

.read-btn:hover {
    background-color: #1b5e20;
}

footer {
    background: #1b5e20;
    color: white;
    text-align: center;
    padding: 20px;
    margin-top: 40px;
}