How do I draw a horizontal line between two circles with CSS?

Question

How do I draw a horizontal line in between 2 circles in CSS?

It has to be in the middle of them just as shown in the screenshot.

Example here:

I have drawn the 2 circles, but don't know how to connect them.

#status-buttons a {
  color: black;
  display: inline-block;
  font-size: 17px;
  font-weight: normal;
  margin-right: 0;
  text-align: center;
  text-transform: uppercase;
  min-width: 150px;
  text-decoration: none;
}
#status-buttons a:hover {
  text-decoration: none;
}
#status-buttons a.active span {
  color: white;
  background: #ACCF5B;
  box-shadow: rgba(0, 0, 0, 0.792157) 3px 3px 3px 0;
}
#status-buttons span {
  color: white;
  background: #22bacb;
  display: block;
  height: 45px;
  margin: 0 auto 10px;
  padding-top: 20px;
  width: 60px;
  border-radius: 50%;
  box-shadow: rgba(0, 0, 0, 0.792157) 3px 3px 3px 0;
}

<div id="status-buttons" class="text-center">
  <a href="#/form/regalo" class="active"><span>1</span> Step 1</a>
  <a href="#/form/tusdatos"><span>2</span> Step 2</a>
</div>

See demo on JSFiddle

Answer 1

You can use a pseudo-element to insert an absolutely-positioned border:

#status-buttons {
  position: relative;          /* 1 */
  display: inline-block;       /* 2 */
}
#status-buttons::after {       /* 3 */
  content: "";
  position: absolute;
  width: 50%;
  z-index: -1;                 /* 4 */
  top: 35%;
  left: 25%;
  border: 3px solid #ACCF5B;
}
#status-buttons a {
  color: black;
  display: inline-block;
  font-size: 17px;
  font-weight: normal;
  margin-right: 0;
  text-align: center;
  text-transform: uppercase;
  min-width: 150px;
  text-decoration: none;
}
#status-buttons a:hover {
  text-decoration: none;
}
#status-buttons a.active span {
  color: white;
  background: #ACCF5B;
  box-shadow: rgba(0, 0, 0, 0.792157) 3px 3px 3px 0;
}
#status-buttons span {
  color: white;
  background: #22bacb;
  display: block;
  height: 45px;
  margin: 0 auto 10px;
  padding-top: 20px;
  width: 60px;
  border-radius: 50%;
  box-shadow: rgba(0, 0, 0, 0.792157) 3px 3px 3px 0;
}

<div id="status-buttons" class="text-center">
  <a href="#/form/regalo" class="active"><span>1</span> Step 1</a>
  <a href="#/form/tusdatos"><span>2</span> Step 2</a>
</div>

Notes:

1. Establish nearest positioned ancestor for absolute positioning.
2. Make container consume only the width necessary.
3. Insert pseudo element
4. Ensure that any horizontal line overlap doesn't appear above circles

Answer 2

You can add a new element and position it between the two circles:

#status-buttons a {
    color: black;
    display: inline-block;
    font-size: 17px;
    font-weight: normal;
    margin-right: 0;
    text-align: center;
    text-transform: uppercase;
    min-width: 150px;
    text-decoration: none;
}

#status-buttons a:hover {
  text-decoration: none;
}
    
#status-buttons a.active span {
    color: white;
    background: #ACCF5B;
    box-shadow: rgba(0, 0, 0, 0.792157) 3px 3px 3px 0;
}

#status-buttons span {
    color: white;
    background: #22bacb;
    display: block;
    height: 45px;
    margin: 0 auto 10px;
    padding-top: 20px;
    width: 60px;
    border-radius: 50%;
    box-shadow: rgba(0, 0, 0, 0.792157) 3px 3px 3px 0;
}

#line {
  position: absolute;
  top: 42px;
  left: 112px;
  width: 96px;
  height: 5px;
  background: #ACCF5B;
}

<div id="status-buttons" class="text-center">
                <a href="#/form/regalo" class="active"><span>1</span> Step 1</a>
                <div id="line">
                </div>
                <a href="#/form/tusdatos"><span>2</span> Step 2</a>
            </div>