Horizontal Opt-in Form in Genesis using eNews Extended plugin. http://sridharkatakam.com/horizontal-opt-form-genesis-using-enews-extended-plugin/

functions.php

//* Register Horizontal Opt-In widget area
genesis_register_sidebar( 
    array(
        'id'            => 'horizontal-opt-in',
        'name'          => __( 'Horizontal Opt-In' ),
        'description'   => __( 'This is the widget area for horizontal opt-in form.' ),
) );

//* Display Horizontal Opt-In below Header
add_action( 'genesis_after_header', 'sk_horizontal_opt_in' );
function sk_horizontal_opt_in() {
	genesis_widget_area( 'horizontal-opt-in', array(
		'before'	=> '<div class="horizontal-opt-in widget-area"><div class="wrap">',
		'after'		=> '</div></div>',
	) );
}

style.css

/* ## Horizontal Opt-in Form
--------------------------------------------- */

.horizontal-opt-in {
	padding-top: 20px;
	padding-bottom: 20px;
	background-color: #50c5b5;
}

.enews-widget {
	color: #fff;
}

.enews-widget p {
	float: left;
	width: 40%;
	margin-top: 7px;
	margin-bottom: 0;
	font-weight: bold;
	text-align: center;
	text-transform: uppercase;
}

#subscribe {
	float: right;
	width: 60%;
}

.enews-widget input {
	float: left;
	width: 35%;
	margin-right: 10px;
	margin-bottom: 0;
	padding: 10px;
	border: 1px solid #38aa9a;
	color: #222;
}

.enews-widget input[type="submit"] {
	width: auto;
	padding: 10px 34px;
	background-color: #222;
}

.enews-widget input[type="submit"]:hover {
	color: #fff;
	background-color: #000;
}

@media only screen and (max-width: 1200px) {
	.enews-widget p {
		font-size: 16px;
		text-align: left;
	}

	.enews-widget input {
		width: 30%;
	}
}

@media only screen and (max-width: 800px) {
	.enews-widget p {
		float: none;
		width: 100%;
		margin-bottom: 20px;
		text-align: center;
	}

	#subscribe {
		float: none;
		width: 100%;
	}

	.enews-widget input {
		width: 100%;
		margin-bottom: 20px;
	}

	.enews-widget input[type="submit"] {
		float: none;
		width: 100%;
	}
}