body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: #f0f2f5;
    color: #1c1e21;
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

header {
    padding: 16px;
    border-bottom: 1px solid #dddfe2;
}

header h1 {
    margin: 0;
    font-size: 24px;
}

.post-form {
    padding: 16px;
    border-bottom: 1px solid #dddfe2;
}

.post-form textarea {
    width: 100%;
    height: 80px;
    padding: 8px;
    border: 1px solid #dddfe2;
    border-radius: 6px;
    resize: vertical;
    box-sizing: border-box;
    font-size: 16px;
}

.post-form button {
    display: block;
    width: 100px;
    margin-top: 10px;
    margin-left: auto;
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    background-color: #1877f2;
    color: #fff;
    font-weight: bold;
    cursor: pointer;
}

.post-form button:hover {
    background-color: #166fe5;
}

#feed {
    padding: 16px;
}

.post {
    padding: 12px 0;
    border-bottom: 1px solid #dddfe2;
}

.post:last-child {
    border-bottom: none;
}

.post-content {
    margin-bottom: 10px;
}

.post-actions {
    margin-bottom: 10px;
}

.post-actions button {
    background: none;
    border: none;
    color: #606770;
    cursor: pointer;
    font-weight: bold;
}

.comments {
    padding-left: 20px;
    border-left: 2px solid #dddfe2;
}

.comment {
    margin-top: 10px;
}

.comment-form input {
    width: calc(100% - 16px);
    padding: 8px;
    border: 1px solid #dddfe2;
    border-radius: 6px;
    box-sizing: border-box;
}

.comment-form {
    margin-top: 10px;
}