body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}

header {
    background-color: #333;
    color: #fff;
    padding: 1rem 0;
    text-align: center;
}

main {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem;
}

#post-list {
    width: 80%;
    margin-bottom: 2rem;
}

#posts {
    list-style-type: none;
    padding: 0;
}

#posts li {
    background-color: #fff;
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

#editor {
    width: 80%;
}

#markdown {
    width: 100%;
    height: 200px;
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: 5px;
    border: 1px solid #ccc;
}

button {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 5px;
    background-color: #333;
    color: #fff;
    cursor: pointer;
}

button:hover {
    background-color: #555;
}