vanilla/components/signInUp/style.css

:root {
/* Font Sizes */
    --fs-100: 0.625rem;	
    --fs-200: 0.75rem;
    --fs-300: 0.875rem;
    --fs-400: 1rem;
    --fs-500: 1.125rem;
    --fs-600: 1.25rem;
    --fs-700: 1.5rem;
    --fs-800: 2.5rem;
    --fs-900: 3.5rem;
  
    --fw-regular: 400;
    --fw-semi-bold: 500;
    --fw-bold: 700;
  
  /* Color variables */
    --clr-bg-ltheme: #edebe9;
    --clr-text-ltheme: #1b1b1b;
    --clr-accent-ltheme: #ff8000;
    --clr-primary-ltheme: #d4d4d2; 
    --clr-secondary-ltheme: #babcbb;
    --clr-link-ltheme: blue;
    --clr-border-ltheme: blue;
    
    --clr-bg-dtheme: #121212;
    --clr-text-dtheme: #edebe9;
    --clr-accent-dtheme: #3a3b9c;
    --clr-primary-dtheme: #1b1b1b; 
    --clr-secondary-dtheme: #2d2d2d;
    --clr-link-dtheme: blue;
    --clr-border-dtheme: blue;
   
  /* General Colors  */
    --black: #000; /* Black */
    --white: #fff; /* White */
    --clr-000: #636363;
    --clr-100: #5A5A5A;
    --clr-200: #515151;  
    --clr-300: #484848; 
    --clr-400: #3F3F3F; 
    --clr-500: #363636; 
    --clr-600: #2D2D2D; 
    --clr-700: #242424; 
    --clr-800: #1B1B1B; 
    --clr-900: #121212; 
    
    /* Semantic Colors */
    --clr-success: #118c11; 
    --clr-info: #17a2b8; 
    --clr-warning: #ff8000; 
    --clr-danger: #d00000; 
}

/* CSS Resets */
*, *::before, *::after {
    box-sizing: border-box;
}

/* Remove default margins. */
* {
    margin: 0;
    padding: 0;
}

/* Set core root defaults */
html:focus-within {
    scroll-behavior: smooth;
}

/* Make images easiser to work with. */
img,picture,svg, video {
display: block;
max-width: 100%;
}

/* Remove list styles (bullets/numbers) */
ol, ul, menu {
    list-style: none;
}

/* Form elements inherit font styles. */
input, textarea, button, select {
    font: inherit;
}

/* Motion Reducted Media Query */
@media screen and
  (prefers-reduced-motion: reduce), 
  (update: slow) {
  * {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* Screen reader friendly hidden. */
.visually-hidden:not(:focus):not(:active) {
    border: 0;
    clip: rect(0 0 0 0);
    height: auto;
    margin: 0;
    overflow: hidden;
    padding: 0;
    position: absolute;
    width: 1px;
    white-space: nowrap;
}

/* Body and core Themes */

body{
  display: grid;
  min-width: 100vw;
  min-height: 100vh;
  align-items: start;
  justify-items: center;
  line-height: 1.5rem; 
  background-color: var(--clr-bg-ltheme);
  color: var(--clr-text-ltheme);
}

@media (prefers-color-scheme: dark) {
  body{
    background-color: var(--clr-bg-dtheme);
    color: var(--clr-text-dtheme);
  }
}

h1 {
	margin: 0;
  color: var(--clr-400);
}

h2 {
	text-align: center;
  color: var(--clr-secondary-dtheme);
}

p {
	font-size: 1rem;
	font-weight: 100;
	line-height: 20px;
	letter-spacing: 0.5px;
	margin: 20px 0 30px;
}

span.icon {
	font-size: 1.25rem;
}

span {
	font-size: .8rem;
  color: var(--clr-secondary-dtheme);
}

a {
	color: #333;
	font-size: 14px;
	text-decoration: none;
	margin: 15px 0;
}

button {
	border-radius: 20px;
	border: 1px solid var(--clr-success);
	background-color: var(--clr-success);
	color: #FFFFFF;
	font-size: 12px;
	font-weight: bold;
	padding: 12px 45px;
	letter-spacing: 1px;
	text-transform: uppercase;
	transition: transform 80ms ease-in;
}

button:active {
	transform: scale(0.95);
}

button:focus {
	outline: none;
}

button.ghost {
	background-color: transparent;
	border-color: #FFFFFF;
}

form {
	background-color: #FFFFFF;
	display: flex;
	align-items: center;
	justify-content: center;
	flex-direction: column;
	padding: 0 50px;
	height: 100%;
	text-align: center;
}

input {
	background-color: #eee;
	border: none;
	padding: 12px 15px;
	margin: 8px 0;
	width: 100%;
}

.container {
	background-color: #fff;
	border-radius: 10px;
  	box-shadow: 0 14px 28px rgba(0,0,0,0.25), 
			0 10px 10px rgba(0,0,0,0.22);
	position: relative;
	overflow: hidden;
	width: 768px;
	max-width: 100%;
	min-height: 480px;
}

.form-container {
	position: absolute;
	top: 0;
	height: 100%;
	transition: all 0.6s ease-in-out;
}

.sign-in-container {
	left: 0;
	width: 50%;
	z-index: 2;
}

.container.right-panel-active .sign-in-container {
	transform: translateX(100%);
}

.sign-up-container {
	left: 0;
	width: 50%;
	opacity: 0;
	z-index: 1;
}

.container.right-panel-active .sign-up-container {
	transform: translateX(100%);
	opacity: 1;
	z-index: 5;
	animation: show 0.6s;
}

@keyframes show {
	0%, 49.99% {
		opacity: 0;
		z-index: 1;
	}
	
	50%, 100% {
		opacity: 1;
		z-index: 5;
	}
}

.overlay-container {
	position: absolute;
	top: 0;
	left: 50%;
	width: 50%;
	height: 100%;
	overflow: hidden;
	transition: transform 0.6s ease-in-out;
	z-index: 100;
}

.container.right-panel-active .overlay-container{
	transform: translateX(-100%);
}

.overlay {
	background: var(--clr-accent-dtheme);
	background: -webkit-linear-gradient(to right, var(--clr-success), var(--clr-info));
	background: linear-gradient(to right, var(--clr-success), var(--clr-info));
	background-repeat: no-repeat;
	background-size: cover;
	background-position: 0 0;
	color: #FFFFFF;
	position: relative;
	left: -100%;
	height: 100%;
	width: 200%;
  transform: translateX(0);
	transition: transform 0.6s ease-in-out;
}

.container.right-panel-active .overlay {
  	transform: translateX(50%);
}

.overlay-panel {
	position: absolute;
	display: flex;
	align-items: center;
	justify-content: center;
	flex-direction: column;
	padding: 0 40px;
	text-align: center;
	top: 0;
	height: 100%;
	width: 50%;
	transform: translateX(0);
	transition: transform 0.6s ease-in-out;
}

.overlay-left {
	transform: translateX(-20%);
}

.container.right-panel-active .overlay-left {
	transform: translateX(0);
}

.overlay-right {
	right: 0;
	transform: translateX(0);
}

.container.right-panel-active .overlay-right {
	transform: translateX(20%);
}

.social-container {
	margin: 20px 0;
}

.social-container a {
	border: 1px solid #DDDDDD;
	border-radius: 50%;
	display: inline-flex;
	justify-content: center;
	align-items: center;
	margin: 0 5px;
	height: 40px;
	width: 40px;
}