html {
  box-sizing: border-box;
}
*,
*:after,
*:before {
  box-sizing: inherit;
}
html,
body {
  height: 100%;
}
body {
  font-family: "Roboto", Helvetica, Arial, sans-serif;
  margin: 0;
}
h1 {
  margin: 0;
  padding: 0;
}
p{
  display: inline;
}
section {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  color: rgba(0,0,0,0.5);
  font-size: 2rem;
  min-height: 100%;
  height: 100vh;
}
.Quick-navigation {
  position: fixed;
  z-index: 1;
  margin: 0;
  top: 50%;
  right: 0;
  -webkit-transform: translateY(-50%);
          transform: translateY(-50%);
}
.Quick-navigation-item {
  color: rgba(0,0,0,0.4);
  text-decoration: none;
  font-size: 1.3em;
  -webkit-transition: color 0.3s;
  transition: color 0.3s;
  padding: 0.5em;
  display: block;
}
.Quick-navigation-item:hover,
.Quick-navigation-item.current {
  color: #fff;
}
.Scroll-progress-indicator {
  will-change: opacity, transform;
  -webkit-transition: all 0.5s;
  transition: all 0.5s;
  left: -10px;
  border-radius: 2px;
  position: absolute;
  top: 50%;
  opacity: 0;
  padding: 2em;
  -webkit-transform: translateX(200%) translateY(-50%);
          transform: translateX(200%) translateY(-50%);
  background-color: rgba(0,0,0,0.1);
}
.Scroll-progress-indicator.visible {
  -webkit-transform: translateX(-100%) translateY(-50%);
          transform: translateX(-100%) translateY(-50%);
  opacity: 1;
}
#O {
  background-color: rgb(92,110,230);
}
#A {
  background-color: rgb(92,121,230);
}

#B {
  background-color: rgb(92,131,230);
}

#C {
  background-color: rgb(92,138,230);
}

#D {
  background-color: rgb(92,149,230);
}

#E {
  background-color:rgb(92,154,230);
}
#F {
  background-color:rgb(92,165,230);
}

.Scroll-to-top {
  position: fixed;
  right: 20px;
  bottom: 0;
  background-color: rgba(0,0,0,0.2);
  border: none;
  color: rgba(255,255,255,0.5);
  font-size: 1.5rem;
  padding: 0.5em;
  cursor: pointer;
  opacity: 0;
  -webkit-transform: translateY(100%);
          transform: translateY(100%);
  -webkit-transition: all 0.3s;
  transition: all 0.3s;
  outline: none;
}
.Scroll-to-top.visible {
  opacity: 1;
  -webkit-transform: translateY(0);
          transform: translateY(0);
}
.Scroll-to-top:hover {
  color: rgba(255,255,255,0.9);
}


#txt{
  width:50%;
}