webpass/static/css/login.css

@import url("https://fonts.googleapis.com/css?family=Raleway:400,700");
*, *:before, *:after {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  font-family: "Raleway", sans-serif;
  margin: 0;
  padding: 0;
  overflow: hidden;
}

.container {
  position: absolute;
  width: 100vw;
  height: 100vh;
  top: 0;
  left: 0;
  overflow: hidden;
}

.top:before, .top:after, .bottom:before, .bottom:after {
  content: "";
  display: block;
  position: absolute;
  width: 200vmax;
  height: 200vmax;
  top: 50%;
  left: 50%;
  margin-top: -100vmax;
  transform-origin: 0 50%;
  transition: all 0.5s cubic-bezier(0.445, 0.05, 0, 1);
  z-index: 20;
  opacity: 0.65;
  transition-delay: 0.2s;
}
.top:before { transform: rotate(45deg); background: #e46569; }
.top:after { transform: rotate(135deg); background: #ecaf81; }
.bottom:before { transform: rotate(-45deg); background: #60b8d4; }
.bottom:after { transform: rotate(-135deg); background: #3745b5; }

.container:hover .top:before,
.container:hover .top:after,
.container:hover .bottom:before,
.container:hover .bottom:after,
.container:active .top:before,
.container:active .top:after,
.container:active .bottom:before,
.container:active .bottom:after {
  margin-left: 200px;
  transform-origin: -200px 50%;
  transition-delay: 0s;
}

/* Only show the content on hover, with no box, border, or background */
.center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 0; /* No padding for box effect */
  opacity: 0;
  pointer-events: none;
  background: none;
  box-shadow: none;
  border: none;
  outline: none;
  z-index: 10;
  transition: opacity 0.5s cubic-bezier(0.445, 0.05, 0, 1);
  transition-delay: 0s;
}

.container:hover .center,
.container:active .center {
  opacity: 1;
  pointer-events: auto;
  background: none;
  box-shadow: none;
  border: none;
  outline: none;
  transition-delay: 0.2s;
}

.center h2 {
  margin-bottom: 20px;
  font-weight: 700;
  color: #333;
  background: none;
  border: none;
  outline: none;
}

/* Google button styling */
.google-btn {
  display: inline-block;
  padding: 10px 20px;
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  background: #4285F4;
  border: none;
  border-radius: 2px;
  text-decoration: none;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
  transition: background 0.2s;
  margin-top: 10px;
}
.google-btn:hover {
  background: #3367D6;
}