* {
  box-sizing: border-box;
}

.MouseHover {
  cursor: pointer;
}

span.blockbar {
  display: inline-block;
  position: relative;
  left: 90px;
  width: 15%;
  height: 36px;
  padding-left: 12px;
  padding-top: 5px;
  border: 1px solid blue;    
  background-color: Cornsilk; 
}

/* The actual timeline (the vertical ruler) */
.timeline {
  position: relative;
  max-width: auto;
  margin: 0 auto;
}

/* The actual timeline (the vertical ruler) */
.timeline::after {
  content: '';
  position: absolute;
  width: 6px;
  background-color: orange;
  top: 0;
  bottom: 0;
  left: 50%;
  margin-left: -3px;
}

/* Container around content */
.container {
  padding: 10px 40px;
  position: relative;
  background-color: inherit;
  width: 50%;
}

/* The circles on the timeline */
.container::after {
  content: '';
  position: absolute;
  width: 25px;
  height: 25px;
  right: -14px;
  background-color: gold;
  border: 4px solid #FF9F55;
  top: 15px;
  border-radius: 50%;
  z-index: 1;
}

/* Place the container to the left */
.left {
  left: 0;
}

/* Place the container to the right */
.right {
  left: 50%;
}

/* Fix the circle for containers on the right side */
.right::after {
  left: -14px;
}

/* The actual content */
.content {
  padding: 7px 10px;
  background-color: Lavender;
  position: relative;
  border-radius: 6px;
}

@media (prefers-color-scheme: dark) {
span.blockbar {background-color: slategrey;}
div.content {background-color: #7d8c9b;}
}


/* Media queries - Responsive timeline on screens less than 1000px wide */
@media screen and (max-width: 1000px) {
  /* Place the timelime to the left */
  .timeline::after {
  left: 52%;
  }

  /* Fix the container */
  .container {
  padding: 20px 1px;
  width: 48%;
  }

  /* The circles on the timeline */
  .container::after {
  right: -45px;
  }

  /* Fix the circle for containers on the right side */
  .right::after {
    left: 5px;
  }
}

/* Media queries - Responsive timeline on screens less than 750px wide */
@media screen and (max-width: 750px) {
  /* Place the timelime to the left */
  .timeline::after {
  left: 15px;
  }
  
  /* Full-width containers */
  .container {
  width: 100%;
  padding-left: 0px;
  padding-right: 50px;
  }

  /* Make sure that all arrows are pointing leftwards */
  .container::before {
  left: 15px;
  border: medium solid white;
  border-width: 1px 1px 1px 0;
  border-color: transparent white transparent transparent;
  }

  /* Make sure all circles are at the same spot */
  .left::after, .right::after {
  left: 3px;
  }
  
  /* Make all right containers behave like the left ones */
  .right {
  left: 0%;
  }

  /* other fixes */
  span.blockbar {
  left: 30px;
  padding-left: 0px;
  padding-top: 1px;
  border: 0px;
  }
}

@media screen and (max-width: 650px) {
  span.blockbar {
  font-size: 14px;
  }
}

@media screen and (max-width: 500px) {
  /* hide the blockbar */
  span.blockbar {
  display: none;
  }
}

hr.divider {
  border-top: 1px solid silver;
}

@media screen and (max-width: 450px) {
  /* Place the timelime to the left */
  .timeline::after {
  left: 8px;
  }
  
  /* Full-width containers */
  .container {
  width: 100%;
  padding-left: 0px;
  padding-right: 50px;
  }

  /* Make sure that all arrows are pointing leftwards */
  .container::before {
  left: 0px;
  border: medium solid white;
  border-width: 0px 0px 0px 0;
  border-color: transparent white transparent transparent;
  }

  /* Make sure all circles are at the same spot */
  .left::after, .right::after {
  left: 0px;
  }
  
  /* Make all right containers behave like the left ones */
  .right {
  left: 0%;
  }
}