html, body {
  box-sizing: border-box;
  font-size: 16px;
  overflow: hidden;
}

body, h1, h2, h3, h4, h5, h6, p, ol, ul {
  margin: 0;
  padding: 0;
  font-weight: normal;
  width: 100%;
  height: 100%;
  font-family: monospace;
}

h1 {
  text-align: center;
  margin-bottom: 20px;
  margin-top: 40px;
  width: 100%;
}

.center {
  width: 100%;
  max-width: 1000px;
  margin: 0 auto;
}

.sprite {
  background-image: url('assets/sprites.jpg');
  width: 100%;
  background-size: cover;
}

.value {
  font-weight: bold;
}

.controller {
  margin: 0 auto;
  bottom: 100px;
  text-align: center;
}

.mood {
  font-size: 16px;
  display: inline-block;
}

.mood__number {
  font-weight: bold;
  font-size: 18px;
}

.mood__slider {
  display: inline-block;
  width: 240px;
  margin-top: 20px;
}

footer {
  position: absolute;
  text-align: center;
  width: 100%;
  bottom: 10px;
  font-size: 10px;
}

@media only screen and (max-width : 450px) {
  h1 { font-size: 20px; }
  .mood__number { font-size: 14px; }
  .mood__slider { width: 200px; }
}