Pen Settings

HTML

CSS

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URLs added here will be added as <link>s in order, and before the CSS in the editor. You can use the CSS from another Pen by using its URL and the proper URL extension.

+ add another resource

JavaScript

Babel includes JSX processing.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

+ add another resource

Packages

Add Packages

Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

Behavior

Auto Save

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

Want to change your Syntax Highlighting theme, Fonts and more?

Visit your global Editor Settings.

HTML

              
                <input type="radio" name="toggle" id="toggleOpen" value="toggleOpen">
<input type="radio" name="toggle" id="toggleClose" value="toggleClose">
<figure id="welcomeMessage">
  <figcaption>
    <h1>
      <label for="toggleOpen" title="Click to Open"></label>
      <label for="toggleClose" title="Click to Close">✖</label>
      <b>
        w
        <a href="javascript:void(0);" title="Go To Home">
          <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16">
            <defs>
              <lineargradient id="svgGradient" x1="0" y1="0" x2="20" y2="0" gradientUnits="userSpaceOnUse">
                <stop offset="0" stop-color="#00ffc3" />
                <stop offset="0.09090909090909091" stop-color="#00fad9" />
                <stop offset="0.18181818181818182" stop-color="#00f4f0" />
                <stop offset="0.2727272727272727" stop-color="#00eeff" />
                <stop offset="0.36363636363636365" stop-color="#00e6ff" />
                <stop offset="0.4545454545454546" stop-color="#00dcff" />
                <stop offset="0.5454545454545454" stop-color="#00d2ff" />
                <stop offset="0.6363636363636364" stop-color="#00c5ff" />
                <stop offset="0.7272727272727273" stop-color="#00b8ff" />
                <stop offset="0.8181818181818182" stop-color="#6da8ff" />
                <stop offset="0.9090909090909092" stop-color="#9f97ff" />
                <stop offset="1" stop-color="#c285ff" />
              </lineargradient>
            </defs>
            <path fill-rule="evenodd" d="m8 3.293 6 6V13.5a1.5 1.5 0 0 1-1.5 1.5h-9A1.5 1.5 0 0 1 2 13.5V9.293l6-6zm5-.793V6l-2-2V2.5a.5.5 0 0 1 .5-.5h1a.5.5 0 0 1 .5.5z" />
            <path fill-rule="evenodd" d="M7.293 1.5a1 1 0 0 1 1.414 0l6.647 6.646a.5.5 0 0 1-.708.708L8 2.207 1.354 8.854a.5.5 0 1 1-.708-.708L7.293 1.5z" />
          </svg>
        </a>
      </b>
      <b>
        e
        <a href="javascript:void(0);" title="Additional Information">
          <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16">
            <path d="M0 2a2 2 0 0 1 2-2h12a2 2 0 0 1 2 2v12a2 2 0 0 1-2 2H2a2 2 0 0 1-2-2V2zm8.93 4.588-2.29.287-.082.38.45.083c.294.07.352.176.288.469l-.738 3.468c-.194.897.105 1.319.808 1.319.545 0 1.178-.252 1.465-.598l.088-.416c-.2.176-.492.246-.686.246-.275 0-.375-.193-.304-.533L8.93 6.588zM8 5.5a1 1 0 1 0 0-2 1 1 0 0 0 0 2z" />
          </svg>
        </a>
      </b>
      <b>
        l
        <a href="javascript:void(0);" title="Go To Shop">
          <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16">
            <path d="M0 1.5A.5.5 0 0 1 .5 1H2a.5.5 0 0 1 .485.379L2.89 3H14.5a.5.5 0 0 1 .491.592l-1.5 8A.5.5 0 0 1 13 12H4a.5.5 0 0 1-.491-.408L2.01 3.607 1.61 2H.5a.5.5 0 0 1-.5-.5zM5 12a2 2 0 1 0 0 4 2 2 0 0 0 0-4zm7 0a2 2 0 1 0 0 4 2 2 0 0 0 0-4zm-7 1a1 1 0 1 1 0 2 1 1 0 0 1 0-2zm7 0a1 1 0 1 1 0 2 1 1 0 0 1 0-2z" />
          </svg>
        </a>
      </b>
      <b>
        c
        <a href="javascript:void(0);" title="Send an Email">
          <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16">
            <path d="M.05 3.555A2 2 0 0 1 2 2h12a2 2 0 0 1 1.95 1.555L8 8.414.05 3.555ZM0 4.697v7.104l5.803-3.558L0 4.697ZM6.761 8.83l-6.57 4.026A2 2 0 0 0 2 14h6.256A4.493 4.493 0 0 1 8 12.5a4.49 4.49 0 0 1 1.606-3.446l-.367-.225L8 9.586l-1.239-.757ZM16 4.697v4.974A4.491 4.491 0 0 0 12.5 8a4.49 4.49 0 0 0-1.965.45l-.338-.207L16 4.697Z" />
            <path d="M16 12.5a3.5 3.5 0 1 1-7 0 3.5 3.5 0 0 1 7 0Zm-3.5-2a.5.5 0 0 0-.5.5v1h-1a.5.5 0 0 0 0 1h1v1a.5.5 0 0 0 1 0v-1h1a.5.5 0 0 0 0-1h-1v-1a.5.5 0 0 0-.5-.5Z" />
          </svg>
        </a>
      </b>
      <b>
        o
        <a href="javascript:void(0);" title="Facebook">
          <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16">
            <path d="M16 8.049c0-4.446-3.582-8.05-8-8.05C3.58 0-.002 3.603-.002 8.05c0 4.017 2.926 7.347 6.75 7.951v-5.625h-2.03V8.05H6.75V6.275c0-2.017 1.195-3.131 3.022-3.131.876 0 1.791.157 1.791.157v1.98h-1.009c-.993 0-1.303.621-1.303 1.258v1.51h2.218l-.354 2.326H9.25V16c3.824-.604 6.75-3.934 6.75-7.951z" />
          </svg>
        </a>
      </b>
      <b>
        m
        <a href="javascript:void(0);" title="Instagram">
          <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16">
            <path d="M8 0C5.829 0 5.556.01 4.703.048 3.85.088 3.269.222 2.76.42a3.917 3.917 0 0 0-1.417.923A3.927 3.927 0 0 0 .42 2.76C.222 3.268.087 3.85.048 4.7.01 5.555 0 5.827 0 8.001c0 2.172.01 2.444.048 3.297.04.852.174 1.433.372 1.942.205.526.478.972.923 1.417.444.445.89.719 1.416.923.51.198 1.09.333 1.942.372C5.555 15.99 5.827 16 8 16s2.444-.01 3.298-.048c.851-.04 1.434-.174 1.943-.372a3.916 3.916 0 0 0 1.416-.923c.445-.445.718-.891.923-1.417.197-.509.332-1.09.372-1.942C15.99 10.445 16 10.173 16 8s-.01-2.445-.048-3.299c-.04-.851-.175-1.433-.372-1.941a3.926 3.926 0 0 0-.923-1.417A3.911 3.911 0 0 0 13.24.42c-.51-.198-1.092-.333-1.943-.372C10.443.01 10.172 0 7.998 0h.003zm-.717 1.442h.718c2.136 0 2.389.007 3.232.046.78.035 1.204.166 1.486.275.373.145.64.319.92.599.28.28.453.546.598.92.11.281.24.705.275 1.485.039.843.047 1.096.047 3.231s-.008 2.389-.047 3.232c-.035.78-.166 1.203-.275 1.485a2.47 2.47 0 0 1-.599.919c-.28.28-.546.453-.92.598-.28.11-.704.24-1.485.276-.843.038-1.096.047-3.232.047s-2.39-.009-3.233-.047c-.78-.036-1.203-.166-1.485-.276a2.478 2.478 0 0 1-.92-.598 2.48 2.48 0 0 1-.6-.92c-.109-.281-.24-.705-.275-1.485-.038-.843-.046-1.096-.046-3.233 0-2.136.008-2.388.046-3.231.036-.78.166-1.204.276-1.486.145-.373.319-.64.599-.92.28-.28.546-.453.92-.598.282-.11.705-.24 1.485-.276.738-.034 1.024-.044 2.515-.045v.002zm4.988 1.328a.96.96 0 1 0 0 1.92.96.96 0 0 0 0-1.92zm-4.27 1.122a4.109 4.109 0 1 0 0 8.217 4.109 4.109 0 0 0 0-8.217zm0 1.441a2.667 2.667 0 1 1 0 5.334 2.667 2.667 0 0 1 0-5.334z" />
          </svg>
        </a>
      </b>
      <b>
        e
        <a href="javascript:void(0);" title="LinkedIn">
          <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16">
            <path d="M0 1.146C0 .513.526 0 1.175 0h13.65C15.474 0 16 .513 16 1.146v13.708c0 .633-.526 1.146-1.175 1.146H1.175C.526 16 0 15.487 0 14.854V1.146zm4.943 12.248V6.169H2.542v7.225h2.401zm-1.2-8.212c.837 0 1.358-.554 1.358-1.248-.015-.709-.52-1.248-1.342-1.248-.822 0-1.359.54-1.359 1.248 0 .694.521 1.248 1.327 1.248h.016zm4.908 8.212V9.359c0-.216.016-.432.08-.586.173-.431.568-.878 1.232-.878.869 0 1.216.662 1.216 1.634v3.865h2.401V9.25c0-2.22-1.184-3.252-2.764-3.252-1.274 0-1.845.7-2.165 1.193v.025h-.016a5.54 5.54 0 0 1 .016-.025V6.169h-2.4c.03.678 0 7.225 0 7.225h2.4z" />
          </svg>
        </a>
      </b>
    </h1>
  </figcaption>
</figure>
              
            
!

CSS

              
                /* Transitions aren't quite as smooth on firefox */

:root {
  --gradient: conic-gradient(
    from 240deg at 50% 50%,
    #00ffc3,
    #00fad9,
    #00f4f0,
    #00eeff,
    #00e6ff,
    #00dcff,
    #00d2ff,
    #00c5ff,
    #00b8ff,
    #6da8ff,
    #9f97ff,
    #c285ff
  );
}

*
, *::before
, *::after {
    box-sizing: border-box;
    font-family: "Poppins", sans-serif;
}

body
, html {
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100vh;
  overflow: hidden;
  margin: 0;
  font-size: 100%;
  background: black;
  color: white;
  backface-visibility: hidden;
}

input {
  display: none;
}

#welcomeMessage {
  font-size: 130%;
}

#welcomeMessage
, #welcomeMessage
  figcaption
, #welcomeMessage
  figcaption
  h1
, #welcomeMessage
  figcaption
  h1
  b {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  margin: 0;
}

#welcomeMessage
figcaption {
  width: auto;
  z-index: 1;
}

#welcomeMessage
figcaption::before
, #welcomeMessage
  figcaption::after {
    position: absolute;
    background: #222;
    width: 0%;
    height: 0%;
    content: "";
    z-index: -1;
}

#welcomeMessage
figcaption::after {
  background: var(--gradient);
  width: calc(100% + 3.1em);
  height: calc(100% + 3.1em);
  z-index: -2;
}

#welcomeMessage
figcaption
h1 {
  text-transform: lowercase;
  background: #555;
  box-shadow: rgba(0, 0, 0, 0.19) 0px 0.625em 1.25em, rgba(0, 0, 0, 0.23) 0px 0.375em 0.375em;
  transition: all 0.1s ease-in-out;
}

#welcomeMessage
figcaption
h1:active {
  transform: scale(0.93);
  transition: all 0.05s ease-in-out;
}

#welcomeMessage
figcaption
h1::before
, #welcomeMessage
  figcaption
  h1::after {
    position: absolute;
    white-space: nowrap;
    font-size: 0.7em;
    font-weight: 200;
    transition: all 0.7s ease-in-out;
}

#welcomeMessage
figcaption
h1::before {
  top: -4.3em;
  right: 2em;
  content: "Click to close";
  font-weight: 400;
  color: #666;
  opacity: 0;
}

#welcomeMessage
figcaption
h1::after {
  bottom: -3em;
  content: "Click to continue";
  transition: all 0.3s ease-in-out;
}

#welcomeMessage
figcaption
h1
label {
  position: absolute;
  width: 100%;
  height: 100%;
  z-index: 999;
}

#welcomeMessage
figcaption
h1
label:nth-child(2) {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1em;
  height: 1em;
  right: 0;
  top: -3em;
  background: transparent;
  color: #666;
  outline: 1px solid #666;
  padding: 5px;
  opacity: 0;
  z-index: 998;
}

#welcomeMessage
figcaption
h1
label:hover {
  cursor: pointer;
}

#welcomeMessage
figcaption
h1
b {
  width: 2em;
  height: 2em;
  background: #555;
  user-select: none;
}

#welcomeMessage
figcaption
h1
b
a {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  z-index: 1;
  transition: all 0.35s ease-in-out;
}

#welcomeMessage
figcaption
h1
b
a:focus::before {
  position: absolute;
  width: 100%;
  height: 100%;
  background: #555;
  border-radius: 0.3em;
  content:"";
  z-index: -1;
}

#welcomeMessage
figcaption
h1
b
a:focus::after {
  position: absolute;
  width: calc(100% + 0.05em);
  height: calc(100% + 0.05em);
  background: var(--gradient);
  border-radius: 0.3em;
  content:"";
  z-index: -2;
  animation: spinny 5s linear infinite;
}

#welcomeMessage
figcaption
h1
b
a:active::after {
  filter: blur(5px);
}

@keyframes spinny {
  0% {
    transform: rotateZ(0deg);
    border-radius: 0.3em;
  }
  50% {
    border-radius: 1em;
  }
  100% {
    transform: rotateZ(360deg);
    border-radius: 0.3em;
  }
}

#welcomeMessage
figcaption
h1
b
a
svg {
  position: relative;
  width: 55%;
  height: auto;
  fill: url(#svgGradient);
  filter: grayscale(100%) brightness(1.2);
  transform: rotateY(-180deg);
  transition: all 200ms linear;
}

#welcomeMessage
figcaption
h1
b
a:hover
svg {
  filter: grayscale(0%) brightness(1);
  transition: all 200ms ease-in-out;
}

#welcomeMessage
figcaption
h1
b
a:focus
svg {
  filter: grayscale(0%) brightness(1);
  transform: rotateY(-180deg) scale(0.9);
  transition: all 70ms linear;
}

#toggleOpen:checked
  ~ #welcomeMessage {
      font-size: 100%;    
}

#toggleOpen:checked
  ~ #welcomeMessage
  figcaption::before {
    width: calc(100% + 3em);
    height: calc(100% + 3em);
    border-radius: 0.7em;
    transition: all 0.7s ease-in-out;
}

#toggleOpen:checked
  ~ #welcomeMessage
  figcaption::after {
    width: calc(100% + 6em);
    height: calc(100% + 6em);
    border-radius: 1em;
    transition: all 0.7s ease-in-out;
}

#toggleClose:checked
  ~ #welcomeMessage
  figcaption::before
  , #toggleClose:checked
    ~ #welcomeMessage
    figcaption::after {
      transition: all 0.7s ease-in-out;
}

#toggleOpen:checked
  ~ #welcomeMessage
  figcaption
  h1 {
    background: transparent;
    box-shadow: none;
}

#toggleOpen:checked
  ~ #welcomeMessage
  figcaption
  h1:active {
    transform: none;
}

#toggleClose:checked
  ~ #welcomeMessage
  figcaption
  h1 {
    background: transparent;
    transition: all 0.05s ease-in-out;
}

#toggleOpen:checked
  ~ #welcomeMessage
  figcaption
  h1::before {
    opacity: 1;
    transition: all 0.7s ease-in-out;
}

#toggleOpen:checked
  ~ #welcomeMessage
  figcaption
  h1::after {
    opacity: 0;
    transition: all 0.7s ease-in-out;
}

#toggleOpen:checked
  ~ #welcomeMessage
  figcaption
  h1
  label:first-of-type {
    display: none;
}

#toggleOpen:checked
  ~ #welcomeMessage
  figcaption
  h1
  label:last-of-type {
    z-index: 999;
    opacity: 1;
    transition: all 0.7s ease-in-out;
}

#toggleOpen:checked
  ~ #welcomeMessage
  figcaption
  h1
  b {
    color: #555;
    border-radius: 0.3em;
    box-shadow: rgba(0, 0, 0, 0.19) 0px 0.625em 1.25em, rgba(0, 0, 0, 0.23) 0px 0.375em 0.375em;
    transition: all 0.35s ease-in-out;
}

#toggleClose:checked
  ~ #welcomeMessage
  figcaption
  h1
  b {
    transition: all 0.35s ease-in-out;
    transition-delay: 0.35s;
    animation: welcomeClose 0.7s ease-in-out 1;
    animation-fill-mode: forwards;
}

#toggleOpen:checked
  ~ #welcomeMessage
  figcaption
  h1
  b:not(:first-of-type, :last-of-type) {
    animation: welcome 0.7s ease-in-out 1;
    animation-fill-mode: forwards;
}

#toggleOpen:checked
  ~ #welcomeMessage
  figcaption
  h1
  b:first-of-type {
    animation: welcomeFirst 0.7s ease-in-out 1;
    animation-fill-mode: forwards;
}

#toggleOpen:checked
  ~ #welcomeMessage
  figcaption
  h1
  b:last-of-type {
    animation: welcomeLast 0.7s ease-in-out 1;
    animation-fill-mode: forwards;
}

#toggleClose:checked
  ~ #welcomeMessage
  figcaption
  h1
  b:first-of-type {
    animation: welcomeCloseFirst 0.7s ease-in-out 1;
    animation-fill-mode: forwards;
}

#toggleClose:checked
  ~ #welcomeMessage
  figcaption
  h1
  b:last-of-type {
    animation: welcomeCloseLast 0.7s ease-in-out 1;
    animation-fill-mode: forwards;
}

#toggleClose:checked
  ~ #welcomeMessage
  figcaption
  h1
  b::after {
    opacity: 0;
    transition: all 0.35s ease-in-out;
}

#toggleOpen:checked
  ~ #welcomeMessage
  figcaption
  h1
  b
  a {
    opacity: 1;
    transition: all 0.35s ease-in-out;
    transition-delay: 0.35s;
}

@keyframes welcome {
  0% {
    margin: 0 0;
    transform: rotateY(0deg);
    width: 2em;
    height: 2em;
  }
  20% {
    transform: rotateY(0deg);
    width: 2em;
    height: 2em;
  }
  80% {
    transform: rotateY(180deg);
    width: 3em;
    height: 3em;
  }
  100% {
    margin: 0 1.5em;
    transform: rotateY(180deg);
    width: 3em;
    height: 3em;
  }
}

@keyframes welcomeFirst {
  0% {
    margin: 0 0;
    transform: rotateY(0deg);
    width: 2em;
    height: 2em;
  }
  20% {
    transform: rotateY(0deg);
    width: 2em;
    height: 2em;
  }
  80% {
    transform: rotateY(180deg);
    width: 3em;
    height: 3em;
  }
  100% {
    margin: 0 1.5em 0 0;
    transform: rotateY(180deg);
    width: 3em;
    height: 3em;
  }
}

@keyframes welcomeLast {
  0% {
    margin: 0 0;
    transform: rotateY(0deg);
    width: 2em;
    height: 2em;
  }
  20% {
    transform: rotateY(0deg);
    width: 2em;
    height: 2em;
  }
  80% {
    transform: rotateY(180deg);
    width: 3em;
    height: 3em;
  }
  100% {
    margin: 0 0 0 1.5em;
    transform: rotateY(180deg);
    width: 3em;
    height: 3em;
  }
}

@keyframes welcomeClose {
  0% {
    margin: 0 1.5em;
    transform: rotateY(180deg);
    width: 3em;
    height: 3em;
  }
  20% {
    transform: rotateY(180deg);
    width: 3em;
    height: 3em;
  }
  80% {
    transform: rotateY(0deg);
    width: 2em;
    height: 2em;
  }
  100% {
    margin: 0 0;
    transform: rotateY(0deg);
    width: 2em;
    height: 2em;
  }
}

@keyframes welcomeCloseFirst {
  0% {
    margin: 0 1.5em 0 0;
    transform: rotateY(180deg);
    width: 3em;
    height: 3em;
  }
  20% {
    transform: rotateY(180deg);
    width: 3em;
    height: 3em;
  }
  80% {
    transform: rotateY(0deg);
    width: 2em;
    height: 2em;
  }
  100% {
    margin: 0 0;
    transform: rotateY(0deg);
    width: 2em;
    height: 2em;
  }
}

@keyframes welcomeCloseLast {
  0% {
    margin: 0 0 0 1.5em;
    transform: rotateY(180deg);
    width: 3em;
    height: 3em;
  }
  20% {
    transform: rotateY(180deg);
    width: 3em;
    height: 3em;
  }
  80% {
    transform: rotateY(0deg);
    width: 2em;
    height: 2em;
  }
  100% {
    margin: 0 0;
    transform: rotateY(0deg);
    width: 2em;
    height: 2em;
  }
}

@media (max-width: 1270px) {
  #toggleOpen:checked
    ~ #welcomeMessage {
        font-size: 80%;
  }
}

@media (max-width: 1000px) { 
  #toggleOpen:checked
    ~ #welcomeMessage {
        font-size: 60%;
  } 
}

@media (max-width: 800px) {
  body {
    height: auto;
    min-height: 100vh;
    overflow-x: hidden;
    overflow-y: auto;
    align-items: flex-start;
  }
  
  #welcomeMessage {
    margin-top: 10em;
  }
  
  #toggleOpen:checked
    ~ #welcomeMessage {
        margin-top: 8em;
        font-size: 100%;
  }
  
  #toggleOpen:checked
    ~ #welcomeMessage
    figcaption
    h1 {
      flex-direction: column;
  }
  
  #welcomeMessage figcaption h1::before {
    content: "Close";
  }
  
  @keyframes welcome {
    0% {
      margin: 0 0;
      transform: rotateY(0deg);
      width: 2em;
      height: 2em;
    }
    20% {
      transform: rotateY(0deg);
      width: 2em;
      height: 2em;
    }
    80% {
      transform: rotateY(180deg);
      width: 3em;
      height: 3em;
    }
    100% {
      margin: 1em 0;
      transform: rotateY(180deg);
      width: 3em;
      height: 3em;
    }
  }

  @keyframes welcomeFirst {
    0% {
      margin: 0 0;
      transform: rotateY(0deg);
      width: 2em;
      height: 2em;
    }
    20% {
      transform: rotateY(0deg);
      width: 2em;
      height: 2em;
    }
    80% {
      transform: rotateY(180deg);
      width: 3em;
      height: 3em;
    }
    100% {
      margin: 0 0 1em 0;
      transform: rotateY(180deg);
      width: 3em;
      height: 3em;
    }
  }

  @keyframes welcomeLast {
    0% {
      margin: 0 0;
      transform: rotateY(0deg);
      width: 2em;
      height: 2em;
    }
    20% {
      transform: rotateY(0deg);
      width: 2em;
      height: 2em;
    }
    80% {
      transform: rotateY(180deg);
      width: 3em;
      height: 3em;
    }
    100% {
      margin: 1em 0 0 0;
      transform: rotateY(180deg);
      width: 3em;
      height: 3em;
    }
  }

  @keyframes welcomeClose {
    0% {
      margin: 1em 0em;
      transform: rotateY(180deg);
      width: 3em;
      height: 3em;
    }
    20% {
      transform: rotateY(180deg);
      width: 3em;
      height: 3em;
    }
    80% {
      transform: rotateY(0deg);
      width: 2em;
      height: 2em;
    }
    100% {
      margin: 0 0;
      transform: rotateY(0deg);
      width: 2em;
      height: 2em;
    }
  }

  @keyframes welcomeCloseFirst {
    0% {
      margin: 0 0 1em 0 !important;
      transform: rotateY(180deg);
      width: 3em;
      height: 3em;
    }
    20% {
      transform: rotateY(180deg);
      width: 3em;
      height: 3em;
    }
    80% {
      transform: rotateY(0deg);
      width: 2em;
      height: 2em;
    }
    100% {
      margin: 0 0;
      transform: rotateY(0deg);
      width: 2em;
      height: 2em;
    }
  }

  @keyframes welcomeCloseLast {
    0% {
      margin: 1em 0 0 0 !important;
      transform: rotateY(180deg);
      width: 3em;
      height: 3em;
    }
    20% {
      transform: rotateY(180deg);
      width: 3em;
      height: 3em;
    }
    80% {
      transform: rotateY(0deg);
      width: 2em;
      height: 2em;
    }
    100% {
      margin: 0 0;
      transform: rotateY(0deg);
      width: 2em;
      height: 2em;
    }
  }
}

@media (max-width: 650px) { 
  #welcomeMessage {
    font-size: 100%;
  }
}

@media (max-width: 500px) { 
  #welcomeMessage {
    font-size: 80%;
  }
  
  #toggleOpen:checked 
    ~ #welcomeMessage {
        font-size: 100%;
  }
}

@media (max-width: 400px) {
  #welcomeMessage {
    font-size: 65%;
  }
}
              
            
!

JS

              
                
              
            
!
999px

Console