body {
  background: url("/assets/img/pattern/p27.png") repeat #444444;
}
.tac {
  text-align: center;
}
.signin {
  margin: 50px auto 0;
}
#logo {
  text-align: center;
  margin-bottom: 10px;
}
.signin {
  background: url("/assets/img/pattern/p23.png") repeat;
  padding: 13px;
  border-radius: 4px;
}