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HTML 

              
                <div class="wrapper">
  <header>
    <svg class="header__logo" xmlns="http://www.w3.org/2000/svg" viewBox="0 318.5 100 125" enable-background="new 0 318.5 100 100"><path d="M88.888 349.937c-.109-.298-.405-.481-.718-.463-5.109.383-11.558.865-18.163 1.358l9.538-12.475c.182-.237.195-.563.033-.814-.162-.25-.46-.376-.756-.307-6.694 1.549-38.692 8.971-43.12 10.304l-6.457-5.539c-.108-.093-.241-.15-.382-.166l-6.908-.774-.053.006-.167.018-.126.032-.044.012-10.098 4.926c-.244.119-.398.366-.398.638 0 .271.155.518.399.637l10.442 5.075.226 3.224.007.024-.001.026 2.333 16.271.012.042.02.066.079.17.033.052.184.169.008.007.019.005.141.066 19.376 5.903 5.754 3.548 1.262 2.943-2.657 14.021c-.04.212.019.431.159.594.135.157.332.247.538.247l.025-.001c.154-.006 15.421-.557 16.007-.572.221-.006.45-.129.579-.308.243-.335.609-.843-4.467-17.763l-.05-.094-.026-.075c-.375-.606-3.278-5.282-4.554-7.092l31.722-23.125c.257-.187.358-.52.249-.816zm-20.773 1.036c-14.051 1.048-28.297 2.104-31.539 2.321l-.293-4.463c3.457-1.007 25.228-6.127 40.94-9.77l-9.108 11.912zm-17.659 29.556l-4.189-2.583 7.808-2.803-3.619 5.386zm-26.808-24.333l10.913-1.279-8.965 14.862-1.948-13.583zm12.112-.522l7.724 21.011-17.23-5.25 9.506-15.761zm-7.272-12.455l6.365 5.46.312 4.74-11.666 1.368-.856-12.224 5.845.656zm-15.092 3.47l7.845-3.827.554 7.909-8.399-4.082zm36.868 51.644l2.459-12.979 7.688-3.065c1.93 6.464 3.891 13.442 4.275 15.528-2.614.09-11.537.412-14.422.516zm2.215-14.407l-1.011-2.36 4.459-6.637c.893 1.301 2.583 3.965 3.894 6.069l-7.342 2.928zm3.106-10.83l-10.522 3.777-8.154-22.182c6.186-.423 39.375-2.906 48.886-3.618l-30.21 22.023z"/></svg>
  </header>

  <main class="content">
    <h1>COMING SOON!</h1>

    <div class="countdown">
      <div class="countdown__days">
        <div class="number"></div>
        <span class>Days</span>
      </div>

      <div class="countdown__hours">
        <div class="number"></div>
        <span class>Hours</span>
      </div>

      <div class="countdown__minutes">
        <div class="number"></div>
        <span class>Minutes</span>
      </div>

      <div class="countdown__seconds">
        <div class="number"></div>
        <span class>Seconds</span>
      </div>
    </div>

    <p>Our website is under construction. We`ll be here soon<br />with our new awesome site. Subscribe to be notified.</p>

    <form action="">
      <input id="form-email" name="form-email" type="email" placeholder="Your email address" />
      <input type="submit" value="Notify me" />
    </form>
  </main>

  <footer>
    <ul class="footer__links">
      <li><a href="#"><span class="fa fa-twitter"></span></a></li>
      <li><a href="#"><span class="fa fa-facebook"></span></a></li>
      <li><a href="#"><span class="fa fa-google-plus"></span></a></li>
      <li><a href="#"><span class="fa fa-github"></span></a></li>
      <li><a href="#"><span class="fa fa-dribbble"></span></a></li>
    </ul>
  </footer>
</div>
!

CSS 

              
                html,
body,
.wrapper {
  height: 100%;
}

html,
body {
  padding: 0;
  margin: 0;
}

body {
  font: 1rem / 1.516 'Montserrat', Arial, sans-serif;
}

.wrapper {
  position: relative;
  background: url(https://source.unsplash.com/vZlTg_McCDo/1920x1080) no-repeat center center / cover;
  
  // Dark overlay
  &:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(33, 33, 33, .25);
  }
}

header,
.content,
footer {
  position: absolute;
}

header,
footer {
  width: 100%;
}

header {
  top: 0;
  text-align: center;
}

.header__logo {
  max-width: 65px;
  fill: #fff;
}

.content {
  top: 50%;
  left: 50%;
  text-align: center;
  color: #fff;
  transform: translate(-50%, -50%);
  
  h1 {
    margin-top: 0;
  }
  
  form {
    margin: auto;
    display: table;
  }
  
  input {
    float: left;
    font-size: 16px;
    border: 1px solid #fff;
  }
  
  input[type=email] {
    padding: 12px;
    background: #fff;
    border-top-left-radius: 4px;
    border-bottom-left-radius: 4px;
  }
  
  input[type=submit] {
    padding: 12px 24px;
    color: #fff;
    background: transparent;
    border-top-right-radius: 4px;
    border-bottom-right-radius: 4px;
    cursor: pointer;
    transition: all .235s ease-in-out;
    
    &:hover {
      color: #212121;
      background: #fff;
    }
  }
}

.countdown {
  margin: auto;
  display: table;
  font-size: 28px;
  font-weight: 500;
  
  > div {
    float: left;
    min-width: 80px;
  }
  
  span {
    position: relative;
    display: block;
    font-size: 16px;
    text-align: center;
    
    &:before {
      content: '';
      position: absolute;
      top: -2px;
      right: 0;
      left: 0;
      margin-right: auto;
      margin-left: auto;
      width: 20px;
      height: 1px;
      background: #fff;
    }
  }
}

footer {
  padding-bottom: 12px;
  bottom: 0;
}

.footer__links {
  text-align: center;
  list-style-type: none;
  
  li {
    display: inline-block;
    
    &:nth-of-type(n+2) {
      margin-left: 12px;
    }
  }
  
  a {
    padding: 8px 0;
    display: block;
    width: 41px;
    text-align: center;
    color: #fff;
    border: 1px solid;
    border-radius: 50%;
    transition: opacity .235s ease-in-out;
    
    &:hover {
      opacity: .5;
    }
  }
  
  .fa {
    vertical-align: middle;
    font-size: 21px;
  }
}
!

JS 

              
                (() => {
  // Specify the deadline date
  const deadlineDate = new Date('December 31, 2099 23:59:59').getTime();
  
  // Cache all countdown boxes into consts
  const countdownDays = document.querySelector('.countdown__days .number');
  const countdownHours= document.querySelector('.countdown__hours .number');
  const countdownMinutes= document.querySelector('.countdown__minutes .number');
  const countdownSeconds= document.querySelector('.countdown__seconds .number');

  // Update the count down every 1 second (1000 milliseconds)
  setInterval(() => {    
    // Get current date and time
    const currentDate = new Date().getTime();

    // Calculate the distance between current date and time and the deadline date and time
    const distance = deadlineDate - currentDate;

    // Calculations the data for remaining days, hours, minutes and seconds
    const days = Math.floor(distance / (1000 * 60 * 60 * 24));
    const hours = Math.floor((distance % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
    const minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
    const seconds = Math.floor((distance % (1000 * 60)) / 1000);

    // Insert the result data into individual countdown boxes
    countdownDays.innerHTML = days;
    countdownHours.innerHTML = hours;
    countdownMinutes.innerHTML = minutes;
    countdownSeconds.innerHTML = seconds;
  }, 1000);
})();
!
999px

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