Gmail Style for Chrome Stylus

/* Add padding at the top of the page */
body {
    margin-top: 20px;    
}

/* Hide the top right user menu */
[data-ogsr-up] {
    display:none;    
}

/* Hide the footer */
div[role=contentinfo] {
    display:none;
}

/* Hide the gmail logo */
a[title=Gmail] {
    display: none;
}

/* Hide support button */
[data-tooltip="Support"] {
    display: none;
}

/* Inbox message row font */
 .inboxsdk__thread_row, span {
    font-family: 'Helvetica Neue',Helvetica,Arial,sans-serif !important;
    font-size: 13px !important; 
} 

/* Inbox message table width */
div[id=":4"], div[id=":3"] {
    padding-left: 80px;
    margin-top: 30px;
    width: 90%;
}

/* Hide the compose button and hamburger menu */
div[gh=cm], div[aria-label="Main menu"] {
    display: none !important;
}

/* Hide the top row left toolbar and toolbar border */
div[gh=mtb] {
    display: none;
}

[role=banner] {
    background-color: #fff !important;
}

.bq9 {
    z-index: 5 !important;
}

/* Shift the search bar position */
[role=search] {
    margin-left: -100px !important;
    margin-top: 15px !important;
}

/* Rename "Updates" categories tab to "Jira" */
[data-tooltip="Personal, auto-generated updates including confirmations, receipts, bills, and statements."] {
   margin-right: -30px;
   color: rgba(0, 0, 0, 0) !important;
}

[data-tooltip="Personal, auto-generated updates including confirmations, receipts, bills, and statements."]::before {
    color: #222 !important;
    content: "Jira";
}

/* Hide Mailvelope icon */
.m-encrypt-frame {
    display:none !important;
}
.m-encrypt-container {
    display:none !important;
}

/* Hide chat on left sidebar */
[role="complementary"] {
    display: none !important;
}

/* Bring right calendar channel to top */
div[style*="z-index: 5"], .bq9 {
 z-index: 100 !important;   
}

/* Hide rooms and chat */
[data-tooltip="Rooms"], [data-tooltip="Chat"], div[gh=chat], div[gh=cl] {
    display: none !important;
}

/* Hide bottom border on left side-nav groups (not durable) */
.V3 {
    border-bottom: none !important;
}

This is a style for the Stylus plugin for Chrome.

Set the "Applies to" option to "URLs Starting With": https://mail.google.com