old Gmail stylesheet

style.css

/* Hide Gmail logo */
#gb > div.gb_Ld.gb_je.gb_Td > div.gb_Dc.gb_5d.gb_Je {
  visibility: hidden;
}

/* Hide side panel */
body > div:nth-child(17) > div.nH > div > div.nH.bkL > div.no > div.nH.bAw.nn.it > div.brC-dA-I-Jw {
 visibility: hidden;
}

/* From:
   https://github.com/shellscape/gmail-classic
*/

/*
  Copyright © 2018 Andrew Powell

  This Source Code Form is subject to the terms of the Mozilla Public
  License, v. 2.0. If a copy of the MPL was not distributed with this
  file, You can obtain one at http://mozilla.org/MPL/2.0/.

  The above copyright notice and this permission notice shall be
  included in all copies or substantial portions of this Source Code Form.
*/

/* ## Generics */

/* Use @font-face to prevent conflicts with received HTML email */
@font-face {
  font-family: "Roboto";
  font-weight: 100 549;
  src: local("Arial");
}

@font-face {
  font-family: "Roboto";
  font-weight: 550 900;
  src: local("Arial Bold");
}

@font-face {
  font-family: "Google Sans";
  font-weight: normal;
  font-weight: 100 549;
  src: local("Arial");
}

@font-face {
  font-family: "Google Sans";
  font-weight: normal;
  font-weight: 550 900;
  src: local("Arial Bold");
}

* {
  -webkit-font-smoothing: auto !important;
  letter-spacing: 0 !important;
}

body,
td,
input,
textarea,
select {
  box-shadow: none !important;
  font-size: 12.8px !important;
  margin: 0 !important;
}

span {
  font-size: 12.8px;
  letter-spacing: normal;
}

a {
  font-size: 12.8px;
}

.aeN,
.wT {
  min-width: 202px !important;
}

.nM,
.xY,
.yW {
  font-size: 0.8rem !important;
}

.TK .TO {
  -webkit-border-radius: 0 !important;
  border-radius: 0 !important;
}

.TN .qr {
  display: none;
}

/* ## Buttons */

.qr {
  visibility: hidden !important;
}

.Bn {
  border: none !important;
}

.bzo > .G-tF > .G-Ni > .T-I,
.SI .bzo > .G-tF > .G-Ni > .T-I {
  margin-left: 0;
}

.bzn:not(.bzo) .mA > .Bn {
  margin: 0 !important;
}

div[role="button"] div::before {
  /* Remove Button Animation */
  transform: scale(0) !important;
}

body[jsaction] [gh="cm"] {
  /* Compose */
  background-color: #d14836 !important;
  background-image: linear-gradient(to bottom, #dd4b39, #d14836) !important;
  border: 1px solid transparent !important;
  border-radius: 2px !important;
  box-shadow: none !important;
  color: #fff !important;
  font-size: 11px !important;
  font-weight: bold !important;
  height: 27px !important;
  line-height: 27px !important;
  margin-left: 18px !important;
  text-shadow: 0 1px rgba(0, 0, 0, 0.1) !important;
  text-transform: uppercase !important;
}

body[jsaction] [gh="cm"]::before {
  /* Compose Background */
  background-image: none !important;
  min-width: 26px !important;
}

body[jsaction] div[jscontroller] > div > div > div > div {
  /* Compose Background */
  margin: -1px !important;
  padding-top: 15px !important;
}

body[jsaction] [data-collapsed-nav-tooltip][data-tooltip-suspended] > div div[style]::after {
  /* Folders */
  display: none !important;
}

body[jsaction] [data-collapsed-nav-tooltip][data-tooltip-suspended] > div div[style]::before {
  /* Folders */
  border-radius: 0 !important;
}

body[jsaction] [data-collapsed-nav-tooltip][data-tooltip-suspended] div div:nth-child(4) {
  /* Tag Dropdown */
  margin-right: 15px;
  position: absolute;
  top: 0;
}

body[jsaction] [data-collapsed-nav-tooltip][data-tooltip-suspended] div div:nth-child(4) div[aria-haspopup="true"]::before {
  /* No Bubbles */
  background-color: initial !important;
}

body[jsaction] [role="navigation"] [data-collapsed-nav-tooltip] {
  /* No Bubbles */
  border-radius: 0 !important;
}

body[jsaction] [role="navigation"] a {
  /* No Bubbles */
  font-size: 12.8px !important;
}

.TI .T-I-ax7,
.z0 .T-I-ax7,
.G-atb .T-I-ax7,
.Bn {
  background-color: transparent !important;
  background-image: -webkit-linear-gradient(top, #f5f5f5, #f1f1f1) !important;
  background-image: linear-gradient(top, #f5f5f5, #f1f1f1) !important;
  background-image: -webkit-linear-gradient(to bottom, #f5f5f5, #f1f1f1) !important;
  background-image: linear-gradient(to bottom, #f5f5f5, #f1f1f1) !important;
  font-size: 11px !important;
  font-weight: bold !important;
}

/* stylelint-disable-next-line */
.TI .T-I-ax7,
.z0 .T-I-ax7,
.G-atb .T-I-ax7,
.Bn {
  border: 1px solid rgba(0, 0, 0, 0.1) !important;
  border-radius: 2px !important;
  height: 26px !important;
  line-height: 27px !important;
  min-width: 64px !important;
}

.G-tF > .G-Ni > .T-I,
.SI .G-tF > .G-Ni > .T-I {
  margin-left: 0 !important;
  margin-right: 24px !important;
}

.G-atb {
  padding: 0 16px 0 0 !important;
}

.G-Ni.J-J5-Ji > .T-I {
  margin-right: 0 !important;
}

.aqL .G-Ni.J-J5-Ji {
  -webkit-box-shadow: none !important;
  box-shadow: none !important;
  margin-right: 32px !important;
  padding-right: 0 !important;
}

.G-Ni.G-aE {
  margin-right: 32px !important;
}

.G-Ni.J-J5-Ji > .T-I:not(:first-child) {
  border-bottom-left-radius: 0 !important;
  border-top-left-radius: 0 !important;
}

.G-Ni.J-J5-Ji:not(:first-child) > .T-I:not(:last-child) {
  border-bottom-right-radius: 0 !important;
  border-top-right-radius: 0 !important;
  margin-right: -1px !important;
}

.aqK,
.G-tF,
.aqJ,
.iH,
.adF {
  height: 28px !important;
}

.d-Na-JX-I.d-Na-M7-JX.d-Na-Gs,
.d-Na-JX-I.d-Na-JG.d-Na-IF {
  height: 28px !important;
  line-height: 28px !important;
}

.G-atb .aqJ .amD,
.G-atb .aqJ .T-I-ax7 {
  margin-left: 0 !important;
  min-width: 40px !important;
}

.G-atb .aqJ .amD:nth-child(2) {
  margin-left: 20px !important;
}

.T-I-JW.amD::before,
.G-Ni .G-asx::before {
  display: none !important;
}

.asa::before,
.T-Jo::before,
.d-Na-JX-I::before {
  display: none !important;
}

.G-Ni.G-aE:not(:first-child) {
  -webkit-box-shadow: none !important;
  box-shadow: none !important;
}

.iG .h0 .adg {
  margin-left: 0 !important;
  min-width: 40px !important;
}

.h0 > .adl {
  padding-right: 20px !important;
}

.nH .gm-boomerang-button-home {
  background-image: linear-gradient(to bottom, #f5f5f5, #f1f1f1) !important;
  border-radius: 2px !important;
  color: transparent !important;
  line-height: 26px !important;
  padding-top: 0 !important;
  position: relative !important;
  text-indent: -9999px !important;
  top: 0 !important;
  width: 66px !important;
}

.nH .gm-boomerang-button-home:hover {
  background-image: linear-gradient(to bottom, #dbdbdb, #e8e8e8) !important;
}

.nH .gm-boomerang-button-home img {
  left: 20px !important;
  position: absolute !important;
  top: 6px !important;
}

.bzn .G-Ni {
  margin-left: 0 !important;
}

.inboxsdk__thread_toolbar_parent .bzn .G-Ni {
  margin-right: 32px !important;
  padding-right: 0 !important;
}

.gm-boomerang-button-thread {
  background-image: linear-gradient(to bottom, #f5f5f5, #f1f1f1) !important;
  position: relative !important;
  text-indent: -20px !important;
  top: 1px !important;
  width: 140px !important;
}

.gm-boomerang-button-thread:hover {
  background-image: linear-gradient(to bottom, #dbdbdb, #e8e8e8) !important;
}

.gm-boomerang-button-thread img {
  left: 20px !important;
  position: absolute !important;
  top: 6px !important;
}

.adg::before {
  display: none !important;
}

/* ## Email Count */

body[jsaction] [data-collapsed-nav-tooltip][data-tooltip-suspended] div div.aio {
  flex: inherit !important;
}

body[jsaction] [data-collapsed-nav-tooltip][data-tooltip-suspended] div div.aio div:last-child {
  color: #222;
  display: initial !important;
  font-size: 12.8px;
  font-weight: bold;
  padding-left: 5px;
}

body[jsaction] [data-collapsed-nav-tooltip][data-tooltip-suspended] div div.aio div:last-child::before {
  content: "(";
}

body[jsaction] [data-collapsed-nav-tooltip][data-tooltip-suspended] div div.aio div:last-child:last-child::after {
  content: ")";
}

/* ## Labels */

.ar {
  border-radius: 5 !important;
  font-size: 0.7rem !important;
}

/* ## List Rows */

.wT > .n3 .byl:first-child .aim:first-child .nZ {
  background-color: transparent !important;
}

.yO {
  background: rgba(242, 245, 245, 0.8) !important;
  border-bottom: 1px #e5e5e5 solid !important;
  color: #222 !important;
}

.zA {
  /* Rows */
  border-bottom: 1px solid rgba(0, 0, 0, 0.06) !important;
  box-shadow: unset !important;
  padding-bottom: 7px;
  padding-top: 6px;
}

.zE {
  border-bottom: 1px #e5e5e5 solid !important;
  color: #222 !important;
  -webkit-font-smoothing: auto !important;
}

.x7 {
  /* Selected Row */
  background: #ffc !important;
  color: #222 !important;
}

.zA:hover,
.zE,
.yO {
  -webkit-box-shadow: none !important;
  box-shadow: none !important;
  -webkit-font-smoothing: auto !important;
}

.yW {
  -webkit-font-smoothing: auto !important;
}

/* ## Subject Preview */

.zA .ze {
  font-weight: 400;
}

/* ## Email Detail View */

.hx .gD {
  /* Sender Name */
  font-size: 15px;
  font-weight: 500;
}

.ha > .hP {
  /* Subject */
  font-size: 18px;
}

div {
  /* Tab / Sender */
  font-weight: 400;
}

.bA4 {
  font-size: 13px !important;
}

/* ## Left Nav */

.TO .n0 {
  color: #222 !important;
  font-size: 13px !important;
}

.TO {
  border-left: 4px solid transparent;
}

.nZ.aiq {
  background: transparent !important;
  border-left: 4px solid rgb(221, 75, 57) !important;
}

.nZ.TO .n0 {
  color: rgb(221, 75, 57) !important;
  text-shadow: none !important;
}

.gb_Ra {
  /* Logo Border */
  background-color: #f1f1f1 !important;
  border-width: 0 !important;
}

div[role="navigation"][style][aria-labelledby] h2 + div {
  max-width: 179px !important;
  min-width: 179px !important;
}

body[jsaction] .ain [data-collapsed-nav-tooltip][data-tooltip] > div {
  /* Selection */
  background: #fff;
}

body[jsaction] .ain [data-collapsed-nav-tooltip][data-tooltip] > div::before {
  border-left: 4px solid #dd4b39;
  content: "";
  display: block;
  height: 100%;
  left: 0;
  position: absolute;
  width: 100%;
}

body[jsaction] .ain [data-collapsed-nav-tooltip][data-tooltip] > div:hover {
  background: transparent !important;
  background-color: #f1f3f4 !important;
}

body[jsaction] .ain [data-collapsed-nav-tooltip][data-tooltip] > div a {
  color: #dd4b39 !important;
}

body[jsaction] .ain [data-collapsed-nav-tooltip][data-tooltip] > div > div:nth-child(3) div {
  /* Email Count */
  color: #dd4b39 !important;
}

body[jsaction] [role="navigation"] [data-collapsed-nav-tooltip] > div > div:first-child,
body[jsaction] [role="navigation"] [data-collapsed-nav-tooltip] > div img + div {
  /* Email Count Icon */
  display: none !important;
}

body[jsaction] [role="navigation"] [data-collapsed-nav-tooltip] > div {
  height: 21px !important;
}

/* ## Tabs */

.aAy.aIf-aLe.J-KU-KO,
.aAy.aKe-aLe.J-KU-KO,
.aAy.aJi-aLe.J-KU-KO,
.aAy.aH2-aLe.J-KU-KO {
  height: 38px !important;
}

.aKh {
  background-color: #f5f5f5 !important;
  height: 38px !important;
  margin-top: 5px !important;
}

.l2 {
  padding-bottom: 5px !important;
}

.l6 {
  padding-top: 0 !important;
}

.bAp.b8.UC .vh {
  font-size: 12px;
  margin-left: 260px;
  opacity: 0.4;
  padding-right: 30px;
}

/* ## Header */

header[role="banner"] {
  background-color: #f1f1f1 !important;
}

#aso_search_form_anchor {
  background-color: #fff !important;
}

#aso_search_form_anchor:hover {
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.1) !important;
}

/* ## Message */

[role="main"] table[role="presentation"] > tr > td:first-child > div:nth-child(2) > div:first-child {
  /* Title */
  padding: 8px 0 0 8px;
  position: relative;
}

div:not([role="list"]) div[data-message-id][class]::before {
  /* Title Bottom Border */
  border-bottom: 1px solid #d8d8d8;
  content: "";
  height: 1px;
  pointer-events: none;
  position: absolute;
  top: 7px;
  width: 100%;
}

[role="main"] table[role="presentation"] > tr > td:first-child > div:nth-child(2) h2 {
  font-size: 17.6px;
}

/* ## Tags */

body[jsaction] [data-collapsed-nav-tooltip][data-tooltip-suspended] > div div[style],
body[jsaction] [data-collapsed-nav-tooltip][data-tooltip-suspended] > div div.qj {
  margin-right: 0 !important;
  position: absolute;
  right: 0;
}

body[jsaction] [data-collapsed-nav-tooltip][data-tooltip-suspended] > div div.qj::after {
  display: none;
}

body[jsaction] [data-collapsed-nav-tooltip][data-tooltip-suspended] > div div.qj::before {
  border-radius: 0 !important;
}