html, body {
  margin: 0;
  width: 100%;
  height: 100%;
  color: #444;
  font-family: "Open Sans", sans-serif;
  background: url("yellow%20bg.jpg") no-repeat;
  background-size: 100% 100%;
}

.container {
  width: 100vw;
  height: 50vh;
  position: fixed;
  top: 50%;
  left: 50%;
  margin: -25vh 0 0 -50vw;
  text-align: center;
}

h1 {
  font-size: 50px;
}

p {
  color: #555;
  font-weight: 600;
  font-style: italic;
  margin-bottom: 40px;
}

a {
  color: #444;
  padding: 5px 30px;
  border: 2px solid #444;
  text-decoration: none;
  font-weight: bold;
}

a:hover {
  color: #fff;
  background: #444;
  transition: 0.3s;
}

@media (min-width: 640px) {
  p {
    padding: 0 50px;
  }
}

@media (min-width: 1024px) {
  p {
    padding: 0 200px;
  }
}

@media (min-width: 1200px) {
  p {
    padding: 0 350px;
  }
}

@media (min-width: 1440px) {
  p {
    padding: 0 500px;
  }
}