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HTML 

              
                <body class="align">

  <div class="grid">

    <h1 class="text-center">United States</h1>
    <h2 class="h3 subline text-center">Discover the land, like never before.</h2>

    <div class="map">

      <ul class="map__markers">

        <li class="map__marker map__marker--chicago">
          <a href="#">Chicago</a>

          <div class="map__marker-info">

            <div class="map__marker-info-inner animate animate--bounce-in">
              <header class="map__marker-info-header">
                <h2>Chicago</h2>
              </header>

              <main class="map__marker-info-main">
                <p><a href="#">Lorem ipsum</a> dolor sit amet, consectetur adipisicing elit. Aliquid asperiores, quae eos modi temporibus vitae nesciunt, quia voluptatem repellat recusandae!</p>
              </main>
            </div>

          </div>
        </li>

        <li class="map__marker map__marker--florida">
          <a href="#">Florida</a>

          <div class="map__marker-info">

            <div class="map__marker-info-inner animate animate--bounce-in">
              <header class="map__marker-info-header">
                <h2>Florida</h2>
              </header>

              <main class="map__marker-info-main">
                <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Aliquid asperiores, quae eos modi temporibus vitae nesciunt, quia voluptatem repellat <a href="#">recusandae</a>!</p>
              </main>

            </div>

          </div>
        </li>

        <li class="map__marker map__marker--los-angeles">
          <a href="#">Los Angeles</a>

          <div class="map__marker-info">
            <div class="map__marker-info-inner animate animate--bounce-in">
              <header class="map__marker-info-header">
                <h2>Los Angeles</h2>
              </header>

              <main class="map__marker-info-main">
                <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Aliquid asperiores, quae eos modi temporibus vitae nesciunt, <a href="#">quia voluptatem</a> repellat recusandae!</p>
              </main>

            </div>

          </div>
        </li>

        <li class="map__marker map__marker--new-york">
          <a href="#">New York</a>

          <div class="map__marker-info">

            <div class="map__marker-info-inner animate animate--bounce-in">
              <header class="map__marker-info-header">
                <h2>New York</h2>
              </header>

              <main class="map__marker-info-main">
                <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Aliquid asperiores, <a href="#">quae eos</a> modi temporibus vitae nesciunt, quia voluptatem repellat recusandae!</p>
              </main>

            </div>

          </div>
        </li>

        <li class="map__marker map__marker--san-francisco">
          <a href="#">San Francisco</a>

          <div class="map__marker-info">

            <div class="map__marker-info-inner animate animate--bounce-in">
              <header class="map__marker-info-header">
                <h2>San Francisco</h2>
              </header>

              <main class="map__marker-info-main">
                <p>Lorem ipsum dolor sit amet, <a href="#">consectetur adipisicing</a> elit. Aliquid asperiores, quae eos modi temporibus vitae nesciunt, quia voluptatem repellat recusandae!</p>
              </main>

            </div>

          </div>
        </li>

        <li class="map__marker map__marker--seattle">
          <a href="#">Seattle</a>

          <div class="map__marker-info">

            <div class="map__marker-info-inner animate animate--bounce-in">
              <header class="map__marker-info-header">
                <h2>Seattle</h2>
              </header>

              <main class="map__marker-info-main">
                <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. <a href="#">Aliquid asperiores</a>, quae eos modi temporibus vitae nesciunt, quia voluptatem repellat recusandae!</p>
              </main>

            </div>

          </div>
        </li>
      </ul>

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      </svg>

    </div>

  </div>

</body>
!

CSS 

              
                @use postcss-preset-env {
  stage: 0;
}

*,
*:before,
*:after {
  box-sizing: inherit;
}

html {
  box-sizing: border-box;
}

body {
  background-color: #32425a;
  color: #7e7e7e;
  font-family: Source Sans Pro, sans-serif;
  line-height: 1.5;
  margin: 0;
  min-height: 100vh;
  padding: 10vmin;
}

a {
  color: #ce606f;
}

h1,
h2,
h3 {
  color: #fff;
  font-weight: 600;
}

h1,
.h1 {
  font-size: 2.5em;
  margin-bottom: 0.25em;
  margin-top: 0;
}

h2,
.h2 {
  font-size: 1.5em;
  margin-bottom: 0.33em;
  margin-top: 0;
}

h3,
.h3 {
  font-size: 1.25em;
  margin: 0 0 0.5em;
}

p {
  margin: 0.5em 0;
}

svg {
  height: auto;
  max-width: 100%;
}

.text-center {
  text-align: center;
}

.subline {
  color: #768191;
  font-weight: normal;
}

.align {
  display: grid;
  place-items: center;
}

.grid {
  margin-left: auto;
  margin-right: auto;
  max-width: 740px;
  width: 90%;
}

.map {
  margin-top: 3em;
  position: relative;
}

.map__markers {
  list-style: none;
  margin: 0;
  padding: 0;
}

.map__marker {
  position: absolute;
}

.map__marker:after {
  animation-duration: 10s;
  animation-iteration-count: infinite;
  animation-name: pop;
  border-radius: 50%;
  border: 1px solid #ce606f;
  content: "";
  height: 2em;
  left: 0;
  margin: -0.5em 0 0 -0.5em;
  opacity: 0;
  position: absolute;
  top: 0;
  width: 2em;
}

.map__marker:hover .map__marker-info {
  display: block;
}

.map__marker > a {
  background-color: #ce606f;
  border-radius: 50%;
  height: 1em;
  display: block;
  text-indent: -9999px;
  width: 1em;
}

.map__marker--chicago {
  left: 65%;
  top: 35%;
}

.map__marker--florida {
  left: 85%;
  top: 86%;
}

.map__marker--florida:after {
  animation-delay: 3s;
}

.map__marker--los-angeles {
  left: 7%;
  top: 60%;
}

.map__marker--los-angeles:after {
  animation-delay: 5s;
}

.map__marker--new-york {
  left: 91%;
  top: 31%;
}

.map__marker--san-francisco {
  left: 1%;
  top: 46%;
}

.map__marker--san-francisco:after {
  animation-delay: 3s;
}

.map__marker--seattle {
  left: 8%;
  top: 1%;
}

.map__marker--seattle:after {
  animation-delay: 5s;
}

.map__marker-info {
  display: none;
  left: 50%;
  position: absolute;
  bottom: 0;
  transform: translate(-50%, -2em);
  width: 20em;
  z-index: 999;
}

.map__marker-info-header {
  background-color: #ce606f;
  border-top-left-radius: 0.5em;
  border-top-right-radius: 0.5em;
  color: #fff;
  padding: 0.5em 1em;
}

.map__marker-info-main {
  background-color: #fff;
  border-bottom-left-radius: 0.5em;
  border-bottom-right-radius: 0.5em;
  color: #7e7e7e;
  padding: 0.5em 1em;
}

.map__marker-info h2 {
  margin-bottom: 0;
}

.map__marker-info-inner {
  border-radius: 0.5em;
  box-shadow: 0 0 0.25em rgba(0, 0, 0, 0.3);
  font-size: 0.875em;
}

.map__marker-info-inner:after {
  border-left: 0.75em solid transparent;
  border-right: 0.75em solid transparent;
  border-top: 1em solid #fff;
  content: "";
  height: 0;
  left: 50%;
  position: absolute;
  top: 100%;
  transform: translateX(-50%);
  width: 0;
}

.animate {
  animation-duration: 1s;
  animation-fill-mode: both;
}

@keyframes bounce-in {
  0%, 20%, 40%, 60%, 80%, 100% {
    transition-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1);
  }
  0% {
    opacity: 0;
    transform: scale3d(0.3, 0.3, 0.3);
  }
  20% {
    transform: scale3d(1.1, 1.1, 1.1);
  }
  40% {
    transform: scale3d(0.9, 0.9, 0.9);
  }
  60% {
    opacity: 1;
    transform: scale3d(1.03, 1.03, 1.03);
  }
  80% {
    transform: scale3d(0.97, 0.97, 0.97);
  }
  100% {
    opacity: 1;
    transform: scale3d(1, 1, 1);
  }
}

.animate--bounce-in {
  animation-duration: 0.75s;
  animation-name: bounce-in;
}
!

JS
!
999px

Console