diff --git a/footer.php b/footer.php
index 8ab451d..287190c 100644
--- a/footer.php
+++ b/footer.php
@@ -42,8 +42,8 @@
 			<?php endif; ?>
 
 			<div class="site-links">
-				<a href="https://www.riken.jp/" target="_blank" rel="noopener noreferrer"><img src="/wp-content/uploads/2019/11/banner-riken.png" alt="RIKEN" /></a>
-				<a href="https://cbs.riken.jp/" target="_blank" rel="noopener noreferrer"><img src="/wp-content/uploads/2019/11/banner-riken-cbs.png" alt="RIKEN Center for Brain Science" /></a><!-- .site-banner -->
+				<a href="https://www.riken.jp/" target="_blank" rel="noopener noreferrer"><img src="/wp-content/uploads/2019/11/banner-riken.png" alt="RIKEN" /><span class="screen-reader-text"><?php _e( '(opens in a new tab)', 'niu' ); ?></span></a>
+				<a href="https://cbs.riken.jp/" target="_blank" rel="noopener noreferrer"><img src="/wp-content/uploads/2019/11/banner-riken-cbs.png" alt="RIKEN Center for Brain Science" /><span class="screen-reader-text"><?php _e( '(opens in a new tab)', 'niu' ); ?></span></a><!-- .site-banner -->
 			</div>
 
 			<div class="site-info">
diff --git a/header.php b/header.php
index c34a42d..cecdf83 100644
--- a/header.php
+++ b/header.php
@@ -99,7 +99,7 @@
 				?>
 				<div class="header-image">
 					<a href="<?php echo esc_url( home_url( '/' ) ); ?>" rel="home">
-						<img src="<?php header_image(); ?>" srcset="<?php echo esc_attr( wp_get_attachment_image_srcset( get_custom_header()->attachment_id ) ); ?>" sizes="<?php echo esc_attr( $custom_header_sizes ); ?>" width="<?php echo esc_attr( get_custom_header()->width ); ?>" height="<?php echo esc_attr( get_custom_header()->height ); ?>" alt="header">
+						<img src="<?php echo esc_url( get_header_image() ); ?>" srcset="<?php echo esc_attr( wp_get_attachment_image_srcset( get_custom_header()->attachment_id ) ); ?>" sizes="<?php echo esc_attr( $custom_header_sizes ); ?>" width="<?php echo esc_attr( get_custom_header()->width ); ?>" height="<?php echo esc_attr( get_custom_header()->height ); ?>" alt="<?php esc_attr_e( 'Site header banner', 'niu' ); ?>">
 					</a>
 				</div><!-- .header-image -->
 			<?php endif; // End header image check. ?>
diff --git a/style.css b/style.css
index 7b802f3..c848f65 100644
--- a/style.css
+++ b/style.css
@@ -44,12 +44,12 @@ p.member {
 	margin-bottom: 1em;
 }
 p {
-	text-align: justify;
+	text-align: left;
 }
 span.notice {
 	font-size: 60%;
 	margin-left: 3px;
-	color: red;
+	color: #a00;
 	font-weight: 700;
 }
 span.byline {
@@ -136,6 +136,44 @@ div.site-links img {
 		float: right;
 	}
 }
+/* Accessibility: Focus styles */
+a:focus,
+button:focus,
+input:focus,
+select:focus,
+textarea:focus {
+	outline: 2px solid #0073aa;
+	outline-offset: 2px;
+}
+
+/* Accessibility: Screen reader text */
+.screen-reader-text {
+	clip: rect(1px, 1px, 1px, 1px);
+	position: absolute !important;
+	height: 1px;
+	width: 1px;
+	overflow: hidden;
+	word-wrap: normal !important;
+}
+
+.screen-reader-text:focus {
+	clip: auto;
+	width: auto;
+	height: auto;
+	display: block;
+	font-size: 1em;
+	font-weight: bold;
+	padding: 15px 23px 14px;
+	background: #f1f1f1;
+	color: #1a5e7a;
+	z-index: 100000;
+	top: 5px;
+	left: 5px;
+	line-height: normal;
+	text-decoration: none;
+	border-radius: 2px;
+}
+
 @media screen and (min-width: 61.5625em) {
 	.site-main {
 		margin-bottom: 4.5em;