.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; h2 { margin: 0; } } .sender-name { font-weight: 500; } .timestamp-absolute { font-size: 13px; color: #333; white-space: pre; } .timestamp-relative { font-size: 12px; color: #999; white-space: pre; }