Add styles for homepage too; add alternative versions of the register buttons.

services/web/public/img/other-brands/logo_google_alt.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 500 510.2"><title>Shape-Copy</title><g id="Layer_2" data-name="Layer 2"><g id="Layer_1-2" data-name="Layer 1"><path id="Shape-Copy" d="M254.85,303.57v-94.9H493.62C497.19,224.74,500,239.8,500,261c0,145.66-97.7,249.23-244.9,249.23C114.29,510.2,0,395.92,0,255.1S114.29,0,255.1,0C324,0,381.63,25.26,425.77,66.58L353.32,137c-18.37-17.35-50.51-37.76-98.21-37.76-84.44,0-153.32,70.15-153.32,156.12S170.66,411.48,255.1,411.48c97.7,0,133.67-67.6,140.31-107.65H254.85Z" fill="#4885ED"/></g></g></svg>

services/web/public/img/other-brands/logo_orcid_alt.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 500 500"><title>Asset 1</title><g id="Layer_2" data-name="Layer 2"><g id="Layer_1-2" data-name="Layer 1"><path d="M289.06,181.64H242.77V336.72h47.85c68.16,0,83.79-51.76,83.79-77.54C374.41,217.19,347.66,181.64,289.06,181.64Z" fill="#95ba2e"/><path d="M250,0C111.91,0,0,111.91,0,250S111.91,500,250,500,500,388.09,500,250,388.09,0,250,0ZM168.55,249V363.67H138.48V154.49h30.08Zm-15-118.36a19.73,19.73,0,1,1,19.73-19.73A19.8,19.8,0,0,1,153.52,130.66Zm140.82,233.2H212.7V154.49h81.25c77.34,0,111.33,55.27,111.33,104.69C405.27,312.89,363.28,363.87,294.34,363.87Z" fill="#95ba2e"/></g></g></svg>

services/web/public/stylesheets/app/homepage.less

@@ -1,3 +1,5 @@
+@register-v-spacing: 20px;
+
 .deprecated-sl-masthead {
 	display: inline-block;
 	margin-top: @header-height;
@@ -73,7 +75,7 @@
 	.register-banner {
 		background-image: -webkit-linear-gradient(top,rgba(0,0,0,0.7),rgba(0,0,0,0.9));
 		background-image: linear-gradient(to bottom,rgba(0,0,0,0.7),rgba(0,0,0,0.9));
-		padding: @line-height-computed 0;
+		padding: @register-v-spacing 0;
 		position: absolute;
 		bottom: 0;
 		width: 100%;
@@ -83,13 +85,17 @@
 			font-family: @font-family-sans-serif;
 			font-weight: 500;
 			letter-spacing: 1px;
+			margin-bottom: @register-v-spacing;
 		}
 		.form-group {
 			margin-left: @line-height-computed / 2;
 		}
+		.input-lg {
+			border-radius: 9999px;
+		}
 	}
 	.screenshot {
-		height: 550px;
+		height: 600px;
 		margin: auto;
 		margin-bottom: -50px;
 		overflow-y: hidden;
@@ -119,6 +125,39 @@
 		float: left;
 	}
 }
+
+.hp-register-external-separator {
+	margin: 0 0 (@register-v-spacing / 2);
+	color: #FFF;
+}
+
+	.hp-register-external-separator-or {
+		vertical-align: middle;
+		&::before,
+		&::after {
+			content: "";
+			display: inline-block;
+			vertical-align: middle;
+			width: 5em;
+			height: 1px;
+			background-color: rgba(255, 255, 255, .3);
+		}
+		&::before {
+			margin-right: 1.25em;
+		}
+		&::after {
+			margin-left: 1.25em;
+		}
+	}
+
+.hp-register-newsletter-checkbox {
+	font-size: 90%;
+}
+
+.hp-login-btn {
+	min-width: 220px;
+}
+
 @media only screen and (max-width: @screen-sm-max) {
 	.masthead {
 		.btn-hero {

services/web/public/stylesheets/app/login-register.less

@@ -4,15 +4,34 @@
 @brand-orcid-color      : #A6CE39;
 @brand-sharelatex-color : #A93529;
 
-.make-login-register-brand-btn(@color) {
-	background-color: @color;
+.make-login-register-brand-btn(@bg-color) {
+	background-color: @bg-color;
 	text-indent: -10px;
+	padding-left: 0;
+	padding-right: 0;
 	&:focus,
 	&:hover {
-		background-color: darken(@color, 8%);
+		background-color: darken(@bg-color, 8%);
 	}
 	&:active {
-		background-color: darken(@color, 16%);
+		background-color: darken(@bg-color, 16%);
+	} 
+}
+
+.make-login-register-brand-btn-alt(@color) {
+	background-color: #FFF;
+	color: @color;
+	text-indent: -10px;
+	padding-left: 0;
+	padding-right: 0;
+	&:focus,
+	&:hover {
+		background-color: #FFF;
+		color: darken(@color, 8%);
+	}
+	&:active {
+		background-color: #FFF;
+		color: darken(@color, 16%);
 	} 
 }
 
@@ -109,6 +128,10 @@
 			.make-login-register-brand-btn(@brand-google-color);
 		} 
 
+		.login-btn-google-alt {
+			.make-login-register-brand-btn-alt(@brand-google-color);
+		} 
+
 		.login-btn-twitter {
 			.make-login-register-brand-btn(@brand-twitter-color);
 		} 
@@ -117,6 +140,10 @@
 			.make-login-register-brand-btn(@brand-orcid-color);
 		} 
 
+		.login-btn-orcid-alt {
+			.make-login-register-brand-btn-alt(darken(@brand-orcid-color, 6%));
+		} 
+
 		.login-btn-sharelatex {
 			.make-login-register-brand-btn(@brand-sharelatex-color);
 		} 
@@ -137,12 +164,18 @@
 			.login-btn-icon-google {
 				background-image: url(/img/other-brands/logo_google.svg);
 			}
+			.login-btn-icon-google-alt {
+				background-image: url(/img/other-brands/logo_google_alt.svg);
+			}
 			.login-btn-icon-twitter {
 				background-image: url(/img/other-brands/logo_twitter.svg);
 			}
 			.login-btn-icon-orcid {
 				background-image: url(/img/other-brands/logo_orcid.svg);
 			}
+			.login-btn-icon-orcid-alt {
+				background-image: url(/img/other-brands/logo_orcid_alt.svg);
+			}
 			.login-btn-icon-sharelatex {
 				background-image: url(/img/other-brands/logo_sharelatex.svg);
 			}