body {
  display: block;
  width: 100%;
  height: 100vh;
  background: url('../img/bg.jpeg') no-repeat center center;
  background-size: cover;
  display: flex;
  align-items: center;
  justify-content: center;
}
main {
  text-align: center;
  padding: 30px 18px 18px 30px;
  background: rgba(255, 255, 255, 0.2);
  box-shadow: 0 0 4px rgba(255, 255, 255, 0.3);
  border-radius: 4px;
}
main .wrapper {
  display: inline-block;
}
main .wrapper .key:nth-child(3) {
  margin-left: -50px;
}
main .wrapper kbd {
  width: 47px;
  height: 49px;
  border-radius: 8px;
  background: #000;
  font-family: Arial, Helvetica, sans-serif;
  color: #fff;
  margin: 0 20px 20px 0;
  text-align: center;
  line-height: 49px;
  background: linear-gradient(to bottom, #292929 0%, #111111 100%);
  border: 1px solid #373737;
  color: #C5C5C5;
  border-radius: 6px;
  box-shadow: 0 0 0 1px #1A1B1C, 0 0 0 2px #1F2020, 0 3px 0 2px #080808;
  font-size: 16px;
  display: inline-block;
  text-transform: uppercase;
  position: relative;
  cursor: default;
}
main .wrapper kbd button {
  position: absolute;
  bottom: 4px;
  right: 4px;
  color: #fff;
  background: #f6a938;
  display: block;
  width: 1.2em;
  height: 1.2em;
  font-size: 12px;
  text-align: center;
  line-height: 1em;
  border-radius: 2px;
  border: none;
  display: none;
  outline: none;
}
main .wrapper kbd button.del {
  left: 1.6em;
}
main .wrapper kbd button:focus,
main .wrapper kbd button:active,
main .wrapper kbd button:hover,
main .wrapper kbd button:visited {
  border: none;
}
main .wrapper kbd:hover button {
  display: block;
}
main .wrapper kbd img {
  position: absolute;
  left: 4px;
  bottom: 4px;
  width: 20px;
  height: 20px;
  border-radius: 4px;
}
main .wrapper kbd span {
  position: absolute;
  left: 4px;
  top: 4px;
  line-height: 1em;
}
footer {
  position: fixed;
  left: 0px;
  bottom: 0px;
  display: block;
  width: 100%;
  height: 4em;
  line-height: 4em;
  text-align: center;
  font-size: 14px;
  background: rgba(200, 200, 200, 0.5);
  box-shadow: 0 -4px 4px rgba(255, 255, 255, 0.2);
  color: #333;
}
footer a {
  color: #222;
  font-weight: 700;
}
header {
  position: fixed;
  left: 0px;
  top: 0px;
  display: block;
  width: 100%;
  height: 4em;
  line-height: 4em;
  text-align: center;
  font-size: 14px;
  background: rgba(200, 200, 200, 0.5);
  box-shadow: 0 4px 4px rgba(255, 255, 255, 0.2);
  color: #333;
  padding-left: 60px;
  padding-right: 60px;
  box-sizing: border-box;
}
header a {
  color: #222;
  font-weight: 700;
}
header .container {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
}
header .container a {
  padding: 0px 10px;
  color: #eee;
}