diff --git a/CHANGELOG.md b/CHANGELOG.md
index f1aee7c..a82ddc1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,16 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.3.1] - 2026-01-09
+
+### Added
+
+- New minimal-style CSS for shortcode form with gray input and black button
+
+### Changed
+
+- Shortcode form now automatically enqueues its own stylesheet
+
 ## [1.3.0] - 2026-01-08
 
 ### Added
diff --git a/assets/css/shortcode-form.css b/assets/css/shortcode-form.css
new file mode 100644
index 0000000..f4d521e
--- /dev/null
+++ b/assets/css/shortcode-form.css
@@ -0,0 +1,122 @@
+/**
+ * Shortcode form styles.
+ *
+ * Minimal design with gray input and black button.
+ *
+ * @package PassWP_Posts
+ */
+
+.passwp-login {
+	max-width: 600px;
+	margin: 0 auto;
+	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
+}
+
+.passwp-login .loginform {
+	margin: 0;
+	padding: 0;
+}
+
+.passwp-login .login-password {
+	margin: 0 0 2px;
+	padding: 0;
+}
+
+.passwp-login .login-password label {
+	position: absolute;
+	width: 1px;
+	height: 1px;
+	padding: 0;
+	margin: -1px;
+	overflow: hidden;
+	clip: rect(0, 0, 0, 0);
+	white-space: nowrap;
+	border: 0;
+}
+
+.passwp-login .login-password .input {
+	display: block;
+	width: 100%;
+	padding: 20px 24px;
+	margin: 0;
+	font-size: 16px;
+	font-weight: 600;
+	letter-spacing: 0.05em;
+	text-transform: uppercase;
+	color: #7a8a99;
+	background-color: #f2f2f2;
+	border: none;
+	box-sizing: border-box;
+	outline: none;
+}
+
+.passwp-login .login-password .input::placeholder {
+	color: #7a8a99;
+	font-weight: 600;
+	letter-spacing: 0.05em;
+	text-transform: uppercase;
+}
+
+.passwp-login .login-password .input:focus {
+	background-color: #e8e8e8;
+}
+
+.passwp-login .login-remember {
+	margin: 16px 0;
+	padding: 0;
+	font-size: 14px;
+	color: #666;
+}
+
+.passwp-login .login-remember label {
+	display: flex;
+	align-items: center;
+	gap: 8px;
+	cursor: pointer;
+}
+
+.passwp-login .login-remember input[type="checkbox"] {
+	width: 18px;
+	height: 18px;
+	margin: 0;
+	cursor: pointer;
+}
+
+.passwp-login .login-submit {
+	margin: 0;
+	padding: 0;
+}
+
+.passwp-login .login-submit .button {
+	display: block;
+	width: 100%;
+	padding: 20px 24px;
+	margin: 0;
+	font-size: 16px;
+	font-weight: 500;
+	letter-spacing: 0.1em;
+	text-transform: uppercase;
+	text-align: center;
+	color: #ffffff;
+	background-color: #000000;
+	border: none;
+	cursor: pointer;
+	box-sizing: border-box;
+	transition: background-color 0.2s ease;
+}
+
+.passwp-login .login-submit .button:hover,
+.passwp-login .login-submit .button:focus {
+	background-color: #333333;
+}
+
+/* Error message */
+.passwp-login p[role="alert"] {
+	margin: 0 0 16px;
+	padding: 12px 16px;
+	background-color: #fef2f2;
+	border: 1px solid #fecaca;
+	border-radius: 4px;
+	color: #dc2626;
+	font-size: 14px;
+}
\ No newline at end of file
diff --git a/includes/Shortcodes.php b/includes/Shortcodes.php
index 1063ddb..7826213 100644
--- a/includes/Shortcodes.php
+++ b/includes/Shortcodes.php
@@ -39,6 +39,14 @@ public function register_shortcodes(): void {
 	 * @param array<string, mixed>|string $atts Shortcode attributes.
 	 */
 	public function render_passwp_login( array|string $atts = [] ): string {
+		// Enqueue shortcode form styles.
+		wp_enqueue_style(
+			'passwp-posts-shortcode',
+			PASSWP_POSTS_URL . 'assets/css/shortcode-form.css',
+			[],
+			PASSWP_POSTS_VERSION
+		);
+
 		$settings = get_option( 'passwp_posts_settings', [] );
 
 		if ( empty( $settings[ 'enabled' ] ) || empty( $settings[ 'password_hash' ] ) ) {
diff --git a/package.json b/package.json
index 55730e1..27b74cf 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "passwp-posts",
-	"version": "1.3.0",
+	"version": "1.3.1",
 	"description": "Password protects all pages and posts except the front page",
 	"type": "module",
 	"scripts": {
diff --git a/passwp-posts.php b/passwp-posts.php
index 7d373a3..98c59f7 100644
--- a/passwp-posts.php
+++ b/passwp-posts.php
@@ -3,7 +3,7 @@
  * Plugin Name: PassWP Posts
  * Plugin URI: https://developer.suspended.no/passwp-posts
  * Description: Password protects all pages and posts except the front page. Logged-in users bypass the password.
- * Version: 1.3.0
+ * Version: 1.3.1
  * Author: Per Soderlind
  * Author URI: https://soderlind.no
  * License: GPL-2.0+
@@ -22,7 +22,7 @@
 defined( 'ABSPATH' ) || exit;
 
 // Plugin constants.
-define( 'PASSWP_POSTS_VERSION', '1.3.0' );
+define( 'PASSWP_POSTS_VERSION', '1.3.1' );
 define( 'PASSWP_POSTS_PATH', plugin_dir_path( __FILE__ ) );
 define( 'PASSWP_POSTS_URL', plugin_dir_url( __FILE__ ) );
 define( 'PASSWP_POSTS_BASENAME', plugin_basename( __FILE__ ) );
diff --git a/readme.txt b/readme.txt
index c7b0fb5..4271b90 100644
--- a/readme.txt
+++ b/readme.txt
@@ -4,7 +4,7 @@ Tags: password, protection, privacy, security, access control
 Requires at least: 6.8
 Tested up to: 6.9
 Requires PHP: 8.3
-Stable tag: 1.3.0
+Stable tag: 1.3.1
 License: GPLv2 or later
 License URI: https://www.gnu.org/licenses/gpl-2.0.html
 
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index 690dfb0..b7b165e 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -200,6 +200,10 @@ protected function setup_common_stubs(): void {
 					throw new \Exception( $message );
 				},
 				'current_user_can'    => '__return_true',
+
+				// Asset functions.
+				'wp_enqueue_style'    => '__return_null',
+				'wp_enqueue_script'   => '__return_null',
 			)
 		);
 	}