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HTML 

              
                div.form-wrapper
    
  .form
    .header
      h1 Let's work together.
      p.intro Just a little form to showcase how you can use DL, DT & DD to spice up your select boxes.
 
    select(name="menu-163"  placeholder="Project" aria-invalid="false").btr-form-control.btr-select
                option(value="Option 1"  disabled selected) Project type...
                option(value="Option 2") Web
                option(value="Option 3") App
                option(value="Option 4") Branding     
                option(value="Option 5") SEO         
            
    textarea(placeholder="Message" rows="1").message
  
    button.submit 
      .inner Submit.
!

CSS 

              
                @import 'https://fonts.googleapis.com/css?family=Raleway:300,400,500,900,700,300|Montserrat:300,400,700';

$size: 20px;
$on: #33afff;
$hlight: #2cffce;
$off: #444;
$selected: rgba(255, 255, 255, 1);
$background: linear-gradient(310deg, #5823fb, #9058bd, #24b2fb, #24fba8);
$main_font: "Montserrat", "Helvetica Neue", Helvetica, Arial, sans-serif;

body {
  font-family: $main_font;
  color: #fff;
  background: linear-gradient(310deg, #5823fb, #9058bd, #24b2fb, #24fba8);
  background-size: 600% 600%;
  position: relative;
  transition: all 0.3s ease-in-out;
  animation: oscillateBG 10s ease infinite;
  width: 100vw;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

.form-wrapper {
  padding: 0 5vw 6vw;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  position: relative;
  z-index: 10;
  .form {
    max-width: 468px;
    margin: auto;
    text-align: center;
    .header {
      padding: 0 30px;
    }
  }
  p {
    color: #aaa;
    font-weight: 300;
    margin-bottom: 30px;
    text-align: justify;
  }
  h1 {
    color: #fff;
    font-weight: 700;
    font-size: 66px;
    line-height: 62px;
    text-align: left;

    span {
      &:first-child {
        color: #ea9078;
      }
      &:nth-child(2) {
        color: #65c3ad;
      }
    }
  }
}


button {
  background: transparent;
  outline: none;
  user-select: none;
  cursor: not-allowed;
  display: block;
  color: #fff;
  border: 0;
  font-family: $main_font;
  font-size: 24px;
  line-height: 1em;
  margin: 20px 0 50px;

  &.submit {
    padding-left: 28px;
    .inner {
      position: relative;
      display: block;

      &:before {
        content: "";
        position: absolute;
        width: calc(100% - 8px);
        height: 3px;
        background-color: #fff;
        top: 0;
        left: 0;
        opacity: 0;
        transition: all 0.25s ease-in-out;
      }
    }
    &:hover {
      .inner {
        &:before {
          opacity: 1;
          transform: translate(0, 30px);
        }
      }
    }
  }
}
p.intro {
  font-family: $main_font;
  text-align: left;
  font-weight: 300;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1.5em;
  font-size: 0.9em;
  letter-spacing: 0.1em;
  //text-rendering: geometric-precision;
}

/**
  /$$$$$$  /$$$$$$$$ /$$       /$$$$$$$$  /$$$$$$  /$$$$$$$$ /$$$$$$ 
 /$$__  $$| $$_____/| $$      | $$_____/ /$$__  $$|__  $$__//$$__  $$
| $$  \__/| $$      | $$      | $$      | $$  \__/   | $$  | $$  \__/
|  $$$$$$ | $$$$$   | $$      | $$$$$   | $$         | $$  |  $$$$$$ 
 \____  $$| $$__/   | $$      | $$__/   | $$         | $$   \____  $$
 /$$  \ $$| $$      | $$      | $$      | $$    $$   | $$   /$$  \ $$
|  $$$$$$/| $$$$$$$$| $$$$$$$$| $$$$$$$$|  $$$$$$/   | $$  |  $$$$$$/
 \______/ |________/|________/|________/ \______/    |__/   \______/ 
**/
select.btr-select {
  display: none;
}

.btr-select {
  width: 100%;
  cursor: pointer;
  position: relative;
  margin: 0 0 30px;
  text-align: left;
  color: #fff;
}
dl.btr-select dt {
  width: 100%;
  box-sizing: border-box;
  color: inherit;
  padding: 18px 25px;
  position: relative;
  line-height: 1.2em;
  font-size: 18px;
  font-weight: 300;
  border: solid 5px rgba(0, 0, 0, 0.3);
  box-shadow: 10px 10px 0 rgba(0, 0, 0, 0.3);
  border-radius: 50px;
  &::after {
    content: "";
    position: absolute;
    width: 10px;
    height: 10px;
    border-right: solid 3px #fff;
    border-bottom: solid 3px #fff;
    right: 20px;
    top: calc(50% - 9px);
    transform: rotate(45deg);
    z-index: 2;

    &.open {
      &::after {
        transform: rotate(225deg);
        top: calc(50% - 7px);
        z-index: 1;
        opacity: 0;
      }
    }
  }
}

dl.btr-select dd {
  position: absolute;
  width: 100%;
  font-size: 18px;
  z-index: 10;
  top: 0;
  left: 0;
  margin: 0;
  visibility: hidden;
  opacity: 0;
  transform: translate(0px, 0px);

  ul {
    list-style: none;
    margin: 0;
    padding: 18px;
    box-shadow: 10px 10px 0 $hlight;
    text-align: left;
  }

  &.open {
    visibility: visible;
    opacity: 1;
    transition: all 0.3s ease-in-out;
    margin-bottom: 0px;
    transform: translate(10px, 10px);
    z-index: 3;

    ul {
      background: white;
      // background: $background;
      // background-size: 600vw 600vh;
      // animation: oscillateBG 10s ease infinite;
      border-radius: 20px;
      list-style: none;
      margin: 0;
      padding: 18px;
      //border: solid 5px $hlight;
      box-shadow: 10px 10px 10px rgba(0, 0, 0, 0.13);
      text-align: left;
      font-weight: 300;

      li {
        &:first-child {
          color: #ccc;
        }
        width: 100%;
        box-sizing: border-box;
        color: #777;
        padding: 8px;
        &:hover {
          background-color: #fafafa;
        }
      }
    }
  }
}





textarea {
  font-family: $main_font;
  width: 100%;
  box-sizing: border-box;
  color: inherit;
  padding: 18px 26px;
  position: relative;
  line-height: 1.2em;
  font-size: 18px;
  font-weight: 300;
  border: solid 5px rgba(0, 0, 0, 0.3);
  box-shadow: 10px 10px 0 rgba(0, 0, 0, 0.3);
  background: transparent;
  outline: none;
  user-select: none;
  margin-bottom: 30px;
  color: #fff;
  height: auto;
  border-radius: 50px;
  &:focus {
    border-color: $hlight;
  }
}

input::-webkit-input-placeholder {
  color: rgba(255, 255, 255, 0.65);
}
textarea::-webkit-input-placeholder {
  color: rgba(255, 255, 255, 0.65);
}


@keyframes oscillateBG {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}
!

JS 

              
                
var textarea = document.querySelector('textarea');

textarea.addEventListener('keydown', autosize);
             
function autosize(){
  
  var el = this;
  var elh = $(this).outerHeight(); 
  
  setTimeout(function(){
    el.style.cssText = 'height:auto;';
    // for box-sizing other than "content-box" use:
   //el.style.cssText = '-moz-box-sizing:content-box';
    el.style.cssText = 'height:' + el.scrollHeight + 'px;' + 'min-height:' + elh + 'px;';
  },0);
}



function simpleSelect() {
  "use strict";
  var selectHolder,
      selectClass;
  //Setup
  $('select').each(function() {
        if( ! $(this).attr('multiple') ){
    selectClass = $(this).attr('class');
    selectHolder = '<dl class="simpleSelect '+selectClass+'">';
    selectHolder += '<dt>'+$('option', this).first().text()+'</dt><dd><ul>';
    $('option', this).each(function() {
      selectHolder += '<li data="'+$(this).val()+'">'+$(this).text()+'</li>';
    });
    selectHolder += '</ul></dd></dl>';
    $(this).after(selectHolder);
    $('.'+selectClass).wrapAll('<div class="selectContainer"></div>');
    }else{
        $(this).show();
    }
  });
  $('.simpleSelect dd ul li').on("click",function(){
    $(this).parents().eq(3).find('select').val($(this).attr('data'));
  });

  $('.simpleSelect dt').on("click",function() {
    if($(this).next('dd').hasClass("open")){
      $(this).removeClass("open").next('dd').removeClass("open");
    }
    else {
      $(this).addClass("open").next('dd').addClass("open");
    }
  });

  $('.simpleSelect dd ul li').on("click",function() {
    $(this).parents().eq(1).removeClass("open");
    $(this).parents().eq(2).find('dt').removeClass("open");
    $(this).parents().eq(4).find('dt').text($(this).text());
  });
}
 $( document ).ready( simpleSelect );
!
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