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HTML

<!DOCTYPE html>
<html lang="en" >
<head>
  <meta charset="UTF-8">
  <title>Andev Web</title>
  <link rel="stylesheet" href="./style.css">

</head>
<body>
<input type="checkbox" name="t-help" id="t-help" checked>
<input type="checkbox" name="t-success" id="t-success" checked>
<input type="checkbox" name="t-warning" id="t-warning" checked>
<input type="checkbox" name="t-error" id="t-error" checked>
<div class="toast-panel">
	<div class="toast-item help">
		<div class="toast help">
			<label for="t-help" class="close"></label> 
			<h3>Help!</h3>
			<p>Do you have a problem? Just use this <a href="#">contact form</a>.</p>
		</div>
	</div>
	<div class="toast-item success">
		<div class="toast success">
			<label for="t-success" class="close"></label>
			<h3>Success!</h3>
			<p>Your message has been sent successfully.</p>
		</div>
	</div>
	<div class="toast-item warning">
		<div class="toast warning">
			<label for="t-warning" class="close"></label>
			<h3>Warning!</h3>
			<p>Sorry, there was a problem with your request.</p>
		</div>
	</div>
	<div class="toast-item error">
		<div class="toast error">
			<label for="t-error" class="close"></label>
			<h3>Error!</h3>
			<p>Change a few thing up and try submitting again.</p>
		</div>
	</div>
	<div class="toast-icons">
		<label for="t-help" class="toast-icon icon-help"></label>
		<label for="t-success"  class="toast-icon icon-success"></label>
		<label for="t-warning"  class="toast-icon icon-warning"></label>
		<label for="t-error" class="toast-icon icon-error"></label>
	</div>
</div>  
</body>
</html>

CSS

@import url('https://fonts.googleapis.com/css2?family=Varela+Round&display=swap');

:root {
	--tr: all 0.5s ease 0s;
	--ch1: #05478a;
	--ch2: #0070e0;
	--cs1: #005e38;
	--cs2: #03a65a;
	--cw1: #c24914;
	--cw2: #fc8621;
	--ce1: #851d41;
	--ce2: #db3056;
}

body {
	margin: 0;
	padding: 0;
	width: 100vw;
	height: 100vh;
	overflow: hidden;
	display: flex;
	align-items: center;
	justify-content: flex-end;
	flex-direction: column;
	background: radial-gradient(circle at 50% 100%, #1d2232, #262434);
	font-family: "Varela Round", sans-serif;
}

.toast-panel {
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	transition: var(--tr);
	position: absolute;
	padding: 0 1rem;
	height: 100%;
	min-height: 20rem;
	min-width: 375px;
}

.toast-item {
	overflow: hidden;
	max-height: 25rem;
	transition: var(--tr);
	animation: show-toast 4s ease 3s 1;
}

@keyframes show-toast { 
	0%, 50%, 100% { max-height: 0; opacity: 0; }
	10%, 25% { max-height: 15rem; opacity: 1; }
}

.toast {
	background-color: #232b2b;
	background: var(--bg);
	color: #f5f5f5;
	padding: 1rem 2rem 1rem 6rem;
	text-align: center;
	border-radius: 2rem;
	position: relative;
	font-weight: 300;
	margin: 1.75rem 0 1rem;
	text-align: left;
	max-width: 15rem;
	transition: var(--tr);
	opacity: 1;
}

.toast:before {
	content: "";
	position: absolute;
	width: 5.5rem;
	height: 6rem;
	--drop: 
		radial-gradient(circle at 64% 51%, var(--clr) 0.45rem, #fff0 calc(0.45rem + 1px)), /*ball 1*/
		radial-gradient(circle at 100% 100%, #fff0 0.9rem, var(--clr) calc(0.9rem + 1px) 1.25rem, #fff0 calc(1.25rem + 1px) 100%), /*neck 2*/ 
		radial-gradient(circle at 0% 0%, #fff0 0.9rem, var(--clr) calc(0.9rem + 1px) 1.25rem, #fff0 calc(1.25rem + 1px) 100%), /*neck 1*/
		radial-gradient(circle at 0% 120%, var(--clr) 4rem, #fff0 calc(4rem + 1px)) /*big 1*/;
	background: 
		radial-gradient(circle at 22% 3.8rem, var(--clr) 0.75rem, #fff0 calc(0.75rem + 1px)), /*ball 8*/ 
		radial-gradient(circle at 95% 1.9rem, var(--clr) 0.07rem, #fff0 calc(0.07rem + 1px)), /*ball 7*/ 
		radial-gradient(circle at 80% 2.25rem, var(--clr) 0.18rem, #fff0 calc(0.18rem + 1px)), /*ball 6*/
		radial-gradient(circle at 80% 75%, var(--clr) 0.35rem, #fff0 calc(0.35rem + 1px)), /*ball 5*/
		radial-gradient(circle at 43% 2.3rem, var(--clr) 0.07rem, #fff0 calc(0.07rem + 1px)), /*ball 4*/ 
		radial-gradient(circle at 40% 1rem, var(--clr) 0.12rem, #fff0 calc(0.12rem + 1px)), /*ball 3*/ 
		radial-gradient(circle at 20% 1.5rem, var(--clr) 0.25rem, #fff0 calc(0.25rem + 1px)), /*ball 2*/
		var(--drop),
		#f000;
	background-repeat: no-repeat;
	background-size: 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 1.625rem 1.625rem, 1.625rem 1.625rem, 100% 100%, 100% 100%;
	background-position: 0 0, 0 0, 0 0, 0 0, 0 0, 0 0, 0 0, 0 0, calc(100% - 1.75rem) 2.85rem, calc(100% - 1.75rem) 2.95rem, 0 0, 0 0;
	bottom: 0rem;
	left: 0rem;
	z-index: 0;
	border-radius: 0 0 0 2rem;
}

.toast:after {
	content: "";
	position: absolute;
	width: 3.5rem;
	height: 3.5rem;
	background: var(--clr);
	top: -1.75rem;
	left: 2rem;
	border-radius: 3rem;
	padding-top: 0.2rem;
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 2.25rem;
	box-sizing: border-box;
}

.toast h3 {
	font-size: 1.35rem;
	margin: 0;
	line-height: 1.35rem;
	font-weight: 300;
	position: relative;
}

.toast h3:before,
.toast-icon:before {
	border: 0.5rem solid #fff0;
	width: 0;
	height: 0;
	position: absolute;
	content: "";
	left: -3.45rem;
	border-top: 1rem solid var(--clr);
	border-left: 1rem solid var(--clr);
	top: -0.4em;
	transform: rotate(-96deg) skewX(30deg);
	border-radius: 0.5rem;
}

.toast p {
	position: relative;
	font-size: 0.95rem;
	z-index: 1;
	margin: 0.25rem 0 0;
}

.close {
	position: absolute;
	width: 1.35rem;
	height: 1.35rem;
	text-align: center;
	right: 1rem;
	cursor: pointer;
	border-radius: 100%;
}

.close:after {
	position: absolute;
	font-family: 'Varela Round', san-serif;
	width: 100%;
	height: 100%;
	left: 0;
	font-size: 1.8rem;
	content: "+";
	transform: rotate(45deg);
	border-radius: 100%;
	display: flex;
	align-items: center;
	justify-content: center;
}

.close:hover {
	background: #f5f5f5;
	color: var(--clr);
}

.toast-item.success {
	animation-delay: 2s;
}

.toast-item.warning {
	animation-delay: 1s;
}

.toast-item.error {
	animation-delay: 0s;
}

.toast.help {
	--clr: var(--ch1);
	--bg: var(--ch2);
}
.toast.help:after,
.icon-help:after {
	content: "?";
}

.toast.success {
	--clr: var(--cs1);
	--bg: var(--cs2);
}

.toast.success:after,
.icon-success:after {
	content: "L";
	font-size: 1.7rem;
	font-weight: bold;
	padding-bottom: 0.5rem;
	transform: rotateY(180deg) rotate(-38deg);
	text-indent: 0.15rem;
}

.toast.warning {
	--clr: var(--cw1);
	--bg: var(--cw2);
}

.toast.warning:after,
.icon-warning:after {
	content: "!";
	font-weight: bold;
}

.toast.error {
	--clr: var(--ce1);
	--bg: var(--ce2);
}

.toast.error:after,
.icon-error:after {
	content: "+";
	font-size: 3rem;
	line-height: 1.2rem;
	transform: rotate(45deg);
}

.toast.success:before {
	--drop: radial-gradient(circle at 65% 63%, var(--clr) 0.425rem, #fff0 calc(0.425rem + 1px)), /*ball 1*/ radial-gradient(circle at 70% 125%, #fff0 1rem, var(--clr) calc(1rem + 1px) 1.25rem, #fff0 calc(1.25rem + 1px) 100%), /*neck 2*/ radial-gradient(circle at 30% -25%, #fff0 1rem, var(--clr) calc(1rem + 1px) 1.25rem, #fff0 calc(1.25rem + 1px) 100%), /*neck 1*/ radial-gradient(circle at 20% 120%, var(--clr) 3.5rem, #fff0 calc(3.5rem + 1px)) /*big 1*/;
	background-position: 0 0.4rem, -0.2rem 3.3rem, 0 0.4rem, -2rem -1.5rem, -0.8rem 0rem, -1rem 0.4rem, 0rem 1.5rem, 1.2rem 0.4rem, calc(100% - 0.75rem) 3.5rem, calc(100% - 0.75rem) 3.75rem, 0 0rem, 0 0rem;
}

.toast.warning:before {
	--drop: radial-gradient(circle at 65% 63%, var(--clr) 0.425rem, #fff0 calc(0.425rem + 1px)), /*ball 1*/ radial-gradient(circle at 129% 36%, #fff0 1rem, var(--clr) calc(1rem + 1px) 1.25rem, #fff0 calc(1.25rem + 1px) 100%), /*neck 2*/ radial-gradient(circle at -27% 25%, #fff0 1rem, var(--clr) calc(1rem + 1px) 1.25rem, #fff0 calc(1.25rem + 1px) 100%), /*neck 1*/ radial-gradient(circle at 20% 120%, var(--clr) 3.5rem, #fff0 calc(3.5rem + 1px)) /*big 1*/;
	background-position: 1.82rem 0.65rem, -1.2rem 1.2rem, -2rem 0.75rem, -3.5rem -1.95rem, -0.5rem -0.55rem, 3rem 4.25rem, 0rem -0.5rem, 1.2rem 0.4rem, calc(100% - 3.9rem) 2.75rem, calc(100% - 3.75rem) 2.75rem, 0 0rem, 0 0rem;
}

.toast.error:before {
	--drop: radial-gradient(circle at 65% 63%, var(--clr) 0.425rem, #fff0 calc(0.425rem + 1px)), /*ball 1*/ radial-gradient(circle at 129% 36%, #fff0 1rem, var(--clr) calc(1rem + 1px) 1.25rem, #fff0 calc(1.25rem + 1px) 100%), /*neck 2*/ radial-gradient(circle at -27% 25%, #fff0 1rem, var(--clr) calc(1rem + 1px) 1.25rem, #fff0 calc(1.25rem + 1px) 100%), /*neck 1*/ radial-gradient(circle at 20% 120%, var(--clr) 3.5rem, #fff0 calc(3.5rem + 1px)) /*big 1*/;
	background-position: 1.75rem 0.75rem, -0.75rem 1.2rem, -1.3rem 0.5rem, -3.5rem -2.5rem, -0.4rem 0rem, 2rem 1.25rem, 0.82rem 1.6rem, 0.5rem 1.65rem, calc(100% - 2.99rem) 3.25rem, calc(100% - 2.75rem) 3rem, 0 0rem, 0 0rem;
}

.toast a {
	color: #fff;
}

.toast-item.closed {
	max-height: 0;
}

/*** ICONS ***/

.toast-icons {
	background: #fff1;
	padding: 1rem 1rem 1.25rem 1rem;
	display: flex;
	justify-content: space-around;
	border-radius: 2rem;
	gap: 1.5rem;
	width: 100%;
	box-sizing: border-box;
	margin-top: 1.5rem;
	margin-bottom: 1rem;
}

.toast-icon {
	width: 3.75rem;
	height: 3.75rem;
	border-radius: 100%;
	display: flex;
	align-items: center;
	justify-content: center;
	color: #fff;
	cursor: pointer;
	position: relative;
}

.toast-icon:before {
	left: 0.7rem;
	top: 2.4em;
	transform: rotate(-96deg) skewX(30deg);
}

.toast-icon:after {
	font-size: 2rem;
	font-weight: bold;
}

.icon-error:after {
	font-size: 3.6rem;
	line-height: 2rem;
	font-weight: 500;
	padding-top: 0.25rem;
	max-height: 2rem;
}

.icon-help {
	background: #0070e0;
	--clr: #0070e0;
}

.icon-success {
	background: #03a65a;
	--clr: #03a65a;
}

.icon-warning {
	background: #fc8621;
	--clr: #fc8621;
}

.icon-error {
	background: #db3056;
	--clr: #db3056;
}

#t-help:checked ~ .toast-panel .toast-item.help,
#t-success:checked ~ .toast-panel .toast-item.success,
#t-warning:checked ~ .toast-panel .toast-item.warning,
#t-error:checked ~ .toast-panel .toast-item.error {
	max-height: 0;
	opacity: 0;
}

input[type=checkbox] {
	display: none;
}

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