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              <!--
  Checkbox Trickery with CSS:
  http://codersblock.com/blog/checkbox-trickery-with-css/ 
-->

<div class="container">
  <h1>
    <span>Subscribe to</span><br>
    Celery Facts Weekly!
  </h1>
  <section>
    <label for="email" class="top-label">Email</label>
    <input id="email" type="email" autocomplete="off">
  </section>
  <section>
    <label class="top-label">How did you hear about us?</label>
    
    <input id="how-friend" name="how" type="radio">
    <label for="how-friend" class="side-label">From a friend</label>

    <input id="how-internet" name="how" type="radio">
    <label for="how-internet" class="side-label">Somewhere on the internet</label>

    <input id="how-other" name="how" type="radio">
    <label for="how-other" class="side-label">Other...</label>
    
    <div class="how-other-disclosure">
      <label for="how-other-explain" class="top-label">Please explain</label>
      <textarea id="how-other-explain"></textarea>
    </div>
  </section>
  <section>
    <input id="permitted" type="checkbox">
    <label for="permitted" class="side-label">I am legally permitted to submit forms</label>
    <div class="blocked">(you have to check the checkbox to continue)</div>
    <button>Submit</button>
  </section>
</div>
            
          
!
            
              @import url(https://fonts.googleapis.com/css?family=Noto+Sans:400,700);

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

html {
  min-height: 100%;
}

body {
  margin: 20px;
  color: #435757;
  background:
    linear-gradient(40deg, transparent 40%, #9ab593),
    linear-gradient(-40deg, #ba7461 20%, #593e4e 90%);
  font: 1.2em/1 'Noto Sans', sans-serif;
}

.container {
  max-width: 500px;
  margin: 0 auto;
  padding: 10px 20px 40px;
  color: #fff;
  background-color: rgba(0, 0, 0, .6);
}

h1 {
  margin: 0;
  padding-bottom: 30px;
  border-bottom: 1px solid #fff;
  line-height: 1.2;
  font-size: 2.2em;
  font-weight: normal;
}

h1 span {
  font-size: .7em;
}

section {
  margin-top: 30px;
}

section::after {
  content: '';
  display: block;
  clear: both;
}

.top-label {
  display: block;
  margin: 10px 0;
}

input[type="email"], textarea {
  display: block;
  width: 100%;
  max-width: 100%;
  padding: 5px;
  border: none;
  color: #593e4e;
  background-color: #fff;
  font-family: inherit;
  font-size: inherit;
  appearance: none;
}

input[type="email"]:focus, textarea:focus, button:focus {
  outline: 2px solid #9ab593;
}

textarea {
  height: 100px;
}

input[type="checkbox"], input[type="radio"] {
  position: absolute;
  left: -9999px;
}

.side-label {
  display: block;
  position: relative;
  margin: 10px 0;
  padding-left: 35px;
  cursor: pointer;
}

.side-label::before, .side-label::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
}

input[type="radio"] + .side-label::before,
input[type="radio"] + .side-label::after {
  border-radius: 50%;
}

.side-label::before {
  display: block;
  width: 20px;
  height: 20px;
  border: 2px solid #fff;  
}

input:focus + .side-label::before {
  border-color: #9ab593;
}

.side-label::after {
  display: none;
  width: 12px;
  height: 12px;
  margin: 4px;
  background-color: #9ab593;
}

input:checked + .side-label::after {
  display: block;
}

.how-other-disclosure {
  display: none;
  margin: 10px 0 0 35px;
}

#how-other:checked ~ .how-other-disclosure {
  display: block;
}

.blocked {
  margin-top: 40px;
  color: rgba(255, 255, 255, .3);
  text-align: center;
}

button {
  display: none;
  appearance: none;
  margin: 40px auto 0;
  padding: 5px 40px;
  border: 2px solid #fff;
  color: rgba(0, 0, 0, .8);
  background-color: #9ab593;
  font-family: inherit;
  font-size: inherit;
  font-weight: bold;
  cursor: pointer;
}

#permitted:checked ~ .blocked {
  display: none;
}

#permitted:checked ~ button {
  display: block;
}
            
          
!
999px
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