feat(*): Restyle the homepage

src/routes/+page.svelte

@@ -8,6 +8,107 @@
 	}
 </script>
 
-<h1>Estimation Poker</h1>
+<div class="container">
+	<p>
+		Simply start a room and share the URL to everyone else who needs to join the estimation session.
+	</p>
+	<button class="button button-green" on:click={startARoom}>Start a room</button>
+</div>
 
-<button on:click={startARoom}>Start a room</button>
+<style>
+	.container {
+		text-align: center;
+	}
+
+	.container p {
+		margin-bottom: 20px;
+	}
+
+	.container button {
+		display: block;
+		margin: 0 auto;
+	}
+
+	.button {
+		appearance: none;
+		border: 1px solid rgba(27, 31, 35, 0.15);
+		border-radius: 6px;
+		box-shadow: rgba(27, 31, 35, 0.1) 0 1px 0;
+		box-sizing: border-box;
+		color: #fff;
+		cursor: pointer;
+		display: inline-block;
+		font-family: -apple-system, system-ui, 'Segoe UI', Helvetica, Arial, sans-serif,
+			'Apple Color Emoji', 'Segoe UI Emoji';
+		font-size: 14px;
+		font-weight: 600;
+		line-height: 20px;
+		padding: 6px 16px;
+		position: relative;
+		text-align: center;
+		text-decoration: none;
+		user-select: none;
+		-webkit-user-select: none;
+		touch-action: manipulation;
+		vertical-align: middle;
+		white-space: nowrap;
+	}
+
+	.button:focus:not(:focus-visible):not(.focus-visible) {
+		box-shadow: none;
+		outline: none;
+	}
+
+	.button:disabled {
+		border-color: rgba(27, 31, 35, 0.1);
+		color: rgba(255, 255, 255, 0.8);
+		cursor: default;
+	}
+
+	.button:focus {
+		outline: none;
+	}
+
+	.button-green {
+		background-color: #2ea44f;
+	}
+
+	.button-green:hover {
+		background-color: #2c974b;
+	}
+
+	.button-green:focus {
+		box-shadow: rgba(46, 164, 79, 0.4) 0 0 0 3px;
+		outline: none;
+	}
+
+	.button-green:disabled {
+		background-color: #94d3a2;
+	}
+
+	.button-green:active {
+		background-color: #298e46;
+		box-shadow: rgba(20, 70, 32, 0.2) 0 1px 0 inset;
+	}
+
+	.button-black {
+		background-color: #423e37;
+	}
+
+	.button-black:hover {
+		background-color: #2e2b26;
+	}
+
+	.button-blue {
+		background-color: #388697;
+	}
+
+	.button-blue:hover {
+		background-color: #275d69;
+	}
+
+	.button-white {
+		background-color: #ffffff;
+		color: black;
+	}
+</style>