style.css

/* Image elements */

#xtnImgHolder, #xtnImg, #xtnImgFade {
  position: fixed;
  width: 100%;
  height: 100%;
}

#xtnImg {
  background-repeat: no-repeat;
  background-position: center;
  background-attachment: fixed;
  background-position: center;
  background-size: cover;
}

#xtnImgFade {
  background-color: rgba(255, 255, 255, 0.3);
}

#xtnBtn {
  bottom: 96px;
  margin-right: 12px;
}

#xtnBtnContent {
  display: flex;
  /* background-color: rgba(255, 255, 255, 0.3); */
  color: #5f6368;
  align-items: center;
  justify-content: center;
}

#xtnBtnContent:before {
  content: 'image';
}

/* Existing color modifications */

#gb,
#gb > div,
.v83gc,
.OCQPo,
.tNDBE,
.yHbHub,
.JE11kf,
.GENA3c,
.YvjgZe.F262Ye:after,
.xWId8e,
.a0xMze  {
  background-color: rgba(255,255,255,0.1) !important;
}

.SU7tYb.F262Ye,
.yEkOpe.F262Ye,
.ecKr0,
.ef2wWc,
.AOL3Kb,
.ZFr60d,
.Cd9hpd, 
.akJTWe,
.XnnJrc.Wyo4Qe .TKMrfe{
  background-color: rgba(255,255,255,0.3) !important;
}

.Xro3Db-nUpftc > div {
  background-color: transparent !important;
}
.Xro3Db-nUpftc > div[role="menu"] {
  background-color: white !important;
}

.rpCPrc > div,
.MSZkRb,
.zRt28b,
.uQ1ixe .snByac,
.NI2kfb,
.nxPHec {
  color: black !important;
}

.pCoqfc, 
.MANBAf,
.akJTWe,
.wy3aMe, 
.SoBqBf,
.OmwDud,
.pqE3fc .wy3aMe {
  color: white !important;
}

.Xro3Db-nUpftc.ymbhmd,
.MDfQ7, 
.wWdzec,
.Gk2izd {
  background-color: rgba(255,255,255,0.8) !important;
}

.Gk2izd .pCoqfc {
  color: black !important;
}

.leOeGd {
  border-width: 8px;
  border-style: solid;
  border-image: linear-gradient(to top, rgba(255,255,255,0.3), rgba(255,255,255,0) 6%) 1;
}

/* Weird that these got disabled... */
.SU7tYb,
.yEkOpe:last-child {
  border-right: #dadce0 1px solid !important;
}
/* ugh... ew. */
.MVMVEe {
  border-right-width: 0px !important;
}
.XnnJrc.Wyo4Qe .TKMrfe {
  top: 0 !important;
  border-top-left-radius: 0px !important;
  border-top-right-radius: 0px !important;
}

/* Day picker */

.HkPXyb {
  background-color: rgba(255,255,255,0.3) !important;
}
.W0m3G .r4nke {
  width: auto !important;
  background-color: transparent !important;
  border-radius: 0 !important;
}
.W0m3G .r4nke:hover {
  background-color: rgba(0,0,0,0.1) !important;
}

/* Includes the new sidebar. */
.gboEAb {
  background-color: rgba(255, 255, 255, 0.3) !important;
}