web-greeter-theme-basealt/style.css

* {
  --bg: rgb(255,165,0);
	--btbg: gray;
	--opacity: 0.9;
	--color: white;
}

html, body {
	width: 99.71%;
	height: 99.51%;
}

body {
	background-image: url("wallpappers/Rosatomflot.jpg");
	background-repeat: no-repeat;
  background-size: 100% 100%;
}

#submit {
	background-color: rgba(255, 140, 0, 1);
	border: 0;
	color: var(--color);
	font-weight:bold;
	margin-left: 5px;
	box-shadow: 1px 1px 1px black;
	border-radius: 5px
}

#password::placeholder {
    font-weight: bold;
    opacity: .5;
    color: var(--color);
}

#menu {
	margin-top: 5px;
	margin-left: 5px;
	margin-right: 5px;
	margin-bottom: 5px;
	height: 100%;
}

div.wrapper {
	height: 100%;
	display: flex;
  align-items: center;
  justify-content: center 
}

div.wrapper table.main {
	margin: 0;
}

input:focus,
select:focus,
option:focus,
textarea:focus,
button:focus {
	outline: none;
}

#date {
	color: var(--color);
	font-size:10px;
	font-weight:bold;
	font-style: italic;
	text-shadow: 1px 1px 1px #000,0 1px 1px #000, -1px 0 1px #000, 0 -1px 1px #000;
}

#password, #user, #user option {
	background-color: var(--bg);
	opacity: var(--opacity);
	border: 0;
	width: 200px;
	margin: 0;
	padding: 0;
	color: var(--color);
}

#user, #user option {
	font-size:35px;
	white-space:nowrap;
}

#wallpappers, #wallpappers option {
	background-color: var(--btbg);
	opacity: var(--opacity);
	border: 0;
	margin: 0;
	padding: 0;
	font-size:10px;
	font-weight:bold;
	color: var(--color);
}

#wallpappers:hover {
	color: var(--bg);
}

select.wallpappers {
	/* for Firefox */
  -moz-appearance: none;
  /* for Chrome */
  -webkit-appearance: none;
}

select.wallpappers::-ms-expand {
	display: none;
}

table, tr, td {
	border: 0;
	border-spacing: 0;
	border-collapse: collapse;
	margin: 0;
	padding: 0;
}

#buttons {
	background-color: gray;
	opacity: var(--opacity);
	width: 150px;
	margin: 0;
	padding: 0;
}

#user_form {
	background-color: var(--bg);
	opacity: var(--opacity);
	width: 400px;
	height: 15em;
	margin: 0;
	padding: 0;
	color: var(--color);
}

#bottom_info {
	font-size:10px;
	font-weight:bold;
	height: 100%;
	color: var(--color);
	height: 100%; 
	border: 1;
	border-spacing: 1;
}

#sessions, #sessions option {
	background-color: rgba(255, 140, 0, 1);
	opacity: 1;
	border: 0;
	width: 150px;
	margin: 0;
	padding: 0;
	color: var(--color);
}

#sessions {
	box-shadow: 1px 1px 1px black;
	border-radius: 5px
}

#underline {
	border-bottom: 2px solid var(--color);
	margin-bottom: 5px;
}

#menu_btn {
	border: 0;
	background-color: var(--btbg);
	opacity: var(--opacity);
	color: var(--color);
	font: small-caps 15px/1 caption;
}

#menu_btn:hover {
	border: 0;
	background-color: var(--btbg);
	opacity: var(--opacity);
	color: var(--bg);
	font: small-caps 15px/1 caption;
}

.user-dropdown {
  display: inline-block;
  position: relative;
	background-color: var(--bg);
	opacity: var(--opacity);
}
.user-dropdown button {
	border: 0;
	background-color: var(--bg);
	opacity: var(--opacity);
	color: var(--color);
	font-weight:bold;
}
.user-dropdown-content {
  display: none;
  position: absolute;
  width: 100%;
  overflow: auto;
  box-shadow: 0px 10px 10px 0px rgba(0,0,0,0.4);
	background-color: var(--bg);
	opacity: var(--opacity);
}
.user-dropdown:hover .user-dropdown-content {
  display: block;
}
.user-dropdown-content button {
	border: 0;
	width:100%;
  display: block;
  padding: 5px;
  text-decoration: none;
	text-align: start;
	background-color: var(--bg);
	opacity: var(--opacity);
	color: var(--color);
}
.user-dropdown-content button:hover {
  color: #FFFFFF;
  background-color: #00A4BD;
}