html, body {
  height: 100%;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.content {
  flex: 1;
}
body.login-page {
    background: url('../img/bg.png') no-repeat center center fixed;
    background-size: cover;
}
body.dashboard-service {
    background: url('../img/bg-service.png') no-repeat center center fixed;
    background-size: cover;
}
body.dashboard {
    background: url('../img/dash.jpg') no-repeat center center fixed;
    background-size: cover;
}