nicohvi/index.html

## index.html
<html>
  <head>
    <title>Halla Martin</title>
    <meta charset="utf-8"/>
    <link rel="stylesheet" href="style.css" />
  </head>
  <body>
    <section class="box">
      <h1>Sorry!</h1>
      <p>
          Du må være over 18 år for å delta
          i konkurransen.
      </p>
      <section class="btn-container">
        <a class="btn" href="#">OK</a>
      </section>
    </section>
  </body>
</html>

## style.css
* {
  box-sizing: border-box;
}

body, html, section, h1, p, a {
  padding: 0;
  margin: 0;
}

body {
  background: #b2dad7;
  color: #333;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

a {
  text-decoration: none;
}

.box {
  background: #f2f2f2;
  width: 50%;
  padding: 40px 60px;
  border-radius: 10px;
  position: relative;
}

h1 {
  font-size: 70px;
  text-align: center;
  text-transform: uppercase;
  margin-bottom: 20px;
}

p {
  text-align: center;
  width: 50%;
  margin: 0 auto;
}

.btn-container {
  display: flex;
  justify-content: center;
  margin-top: 30px;
}

.btn {
  background: #f7eab2;
  padding: 15px 30px;
  color: #333;
  border-radius: 10px;
}

.box:after, .box:before {
  position: absolute;
  bottom: -49px;
  content: " ";
  width: 50%;
  height: 50px;
}

.box:before {
  left: 0;
  border-radius: 10px 0 0 0;
  background: linear-gradient(to right top, transparent 50%, #f2f2f2 50%);
}

.box:after {
  right: 0;
  border-radius: 0 10px 0 0;
  background: linear-gradient(to left top, transparent 50%, #f2f2f2 50%);
}
	<html>
	<head>
	<title>Halla Martin</title>
	<meta charset="utf-8"/>
	<link rel="stylesheet" href="style.css" />
	</head>
	<body>
	<section class="box">
	<h1>Sorry!</h1>
	<p>
	Du må være over 18 år for å delta
	i konkurransen.
	</p>
	<section class="btn-container">
	<a class="btn" href="#">OK</a>
	</section>
	</section>
	</body>
	</html>
	* {
	box-sizing: border-box;
	}

	body, html, section, h1, p, a {
	padding: 0;
	margin: 0;
	}

	body {
	background: #b2dad7;
	color: #333;
	display: flex;
	flex-direction: column;
	justify-content: center;
	align-items: center;
	}

	a {
	text-decoration: none;
	}

	.box {
	background: #f2f2f2;
	width: 50%;
	padding: 40px 60px;
	border-radius: 10px;
	position: relative;
	}

	h1 {
	font-size: 70px;
	text-align: center;
	text-transform: uppercase;
	margin-bottom: 20px;
	}

	p {
	text-align: center;
	width: 50%;
	margin: 0 auto;
	}

	.btn-container {
	display: flex;
	justify-content: center;
	margin-top: 30px;
	}

	.btn {
	background: #f7eab2;
	padding: 15px 30px;
	color: #333;
	border-radius: 10px;
	}

	.box:after, .box:before {
	position: absolute;
	bottom: -49px;
	content: " ";
	width: 50%;
	height: 50px;
	}

	.box:before {
	left: 0;
	border-radius: 10px 0 0 0;
	background: linear-gradient(to right top, transparent 50%, #f2f2f2 50%);
	}

	.box:after {
	right: 0;
	border-radius: 0 10px 0 0;
	background: linear-gradient(to left top, transparent 50%, #f2f2f2 50%);
	}