<section id="camp-activities-inquiry">
  <h1>Camp Activities Inquiry</h1>
  <form action="/submit-form" method="POST">
    <label for="activity-select">Which camp activities are you most looking forward to?</label>
    <select id="activity-select" name="activity">
      <option value="">--Please choose an option--</option>
      <option value="hiking">Hiking</option>
      <option value="canoeing">Canoeing</option>
      <option value="fishing">Fishing</option>
      <option value="crafts">Crafts</option>
      <option value="archery">Archery</option>
    </select>

    <label for="food-allergies">Food Allergies (if any)</label>
    <textarea id="food-allergies" name="food_allergies" rows="4" cols="50"></textarea>

    <label for="additional-info">Additional things the counselor should know</label>
    <textarea id="additional-info" name="additional_info" rows="4" cols="50"></textarea>

    <button type="submit">Submit</button>
  </form>
</section>
@import url("https://fonts.googleapis.com/css2?family=Bubblegum+Sans&display=swap");

body {
  background: url("https://i.imgur.com/USuNW2N.jpeg") no-repeat 50% 18% / auto
    115rem;
}

#camp-activities-inquiry {
  font-family: "Bubblegum Sans", sans-serif;
  padding: 20px;
  border-radius: 8px;
  max-width: 400px;
  margin: 4rem auto;
  position: relative;
}

#camp-activities-inquiry h1 {
  color: #a67c52;
  text-align: center;
  margin-bottom: 20px;
  font-size: 2.5rem;
  font-weight: 700;
}

#camp-activities-inquiry form {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

#camp-activities-inquiry label {
  font-size: 18px;
  color: #5e4223;
  margin-top: 2rem;
}

#camp-activities-inquiry textarea {
  font-family: "Bubblegum Sans", sans-serif;
  padding: 10px;
  background: #fffbe7;
  border: 2px solid #a67c52;
  font-size: 16px;
  color: #5e4223;
}

#camp-activities-inquiry button {
  background-color: #92a86b;
  font-family: "Bubblegum Sans", sans-serif;
  font-size: 24px;
  color: #fff;
  padding: 15px 10px;
  border: none;
  margin-top: 2rem;
  cursor: pointer;
  transition: background-color 0.3s;
  letter-spacing: 1.5px;
}

#camp-activities-inquiry button:hover {
  background-color: #446948;
}

#camp-activities-inquiry button:disabled {
  background-color: transparent;
  border: 2px dashed #a67c52;
  color: #a67c52;
  cursor: default;
}

#activity-select {
  height: 100%;
}
.s-hidden {
  visibility: hidden;
}
.cusSelBlock {
  height: 50px;
  width: 100%;
  display: block;
  position: relative;
  -webkit-perspective: 800px;
  perspective: 800px;
}
.selectLabel {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  z-index: 9999;

  background-color: #fffbe7;
  border: 2px solid #a67c52;
  border-bottom: 2px dashed #a67c52;
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.1);
  color: #5e4223;
  cursor: pointer;
  display: block;

  height: 100%;

  letter-spacing: 1.5px;
  line-height: 50px;
  padding: 0 50px 0 20px;
  text-align: left;

  -webkit-transform-style: preserve-3d;
  transform-style: preserve-3d;
  -webkit-transform-origin: 50% 0%;
  transform-origin: 50% 0%;

  -webkit-transition: -webkit-transform 300ms;
  transition: -webkit-transform 300ms;
  transition: transform 300ms;
  transition: transform 300ms, -webkit-transform 300ms;

  -webkit-backface-visibility: hidden;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  &:after {
    content: "\25BC";
    color: #5e4223;
    font-size: 12px;
    padding: 0px;
    text-align: center;
    position: absolute;
    right: 0px;
    top: 2px;
    bottom: 0;
    width: 50px;
  }
  &:hover {
    -webkit-transform: rotateX(10deg);
    transform: rotateX(10deg);
  }
  &:active {
    -webkit-transform: rotateX(30deg);
    transform: rotateX(30deg);
    &:after {
      content: "\25B2";
    }
  }
  &.active {
    &:after {
      content: "\25B2";
    }
  }
}
::-webkit-scrollbar {
  display: none;
}
.options {
  position: absolute;
  top: -15px;
  right: 0;
  left: 0;
  height: 100%;
  color: #5e4223;
  li {
    background-color: #fffbe7;
    border-left: 2px solid #a67c52;
    border-right: 2px solid #a67c52;
    border-bottom: 2px dashed #a67c52;
    cursor: pointer;
    display: block;
    line-height: 50px;
    list-style: none;
    opacity: 1;
    padding: 0 50px 0 20px;
    text-align: left;
    transition: transform 300ms ease;
    position: absolute;
    top: 0px;
    left: 0;
    right: 0;
    z-index: 0;
    height: 50px;
    &:hover,
    &.active {
      background-color: #5e4223;
      color: #fff;
    }
    &:last-child {
      border-bottom: 2px solid #a67c52;
    }
    &:nth-child(1) {
      display: none;
    }
    &:nth-child(2) {
      transform: translateY(4px);
      z-index: 5;
    }
    &:nth-child(3) {
      transform: translateY(7px);
      z-index: 4;
    }
    &:nth-child(4) {
      z-index: 3;
    }
    &:nth-child(5) {
      z-index: 2;
    }
    &:nth-child(6) {
      z-index: 1;
    }
  }
}
$(function () {
  var defaultSelectBox = $("#activity-select");
  var numOfOptions = defaultSelectBox.children("option").length;
  var customList = $("<ul/>", { class: "options" });

  $("#camp-activities-inquiry button").prop("disabled", true);

  $(
    "#camp-activities-inquiry input, #camp-activities-inquiry textarea, #camp-activities-inquiry select"
  ).on("change", function () {
    var isFilled = true;

    $(
      "#camp-activities-inquiry input, #camp-activities-inquiry textarea, #camp-activities-inquiry select"
    ).each(function () {
      if ($(this).val() === "") {
        isFilled = false;
        return false;
      }
    });

    $("#camp-activities-inquiry button").prop("disabled", !isFilled);
  });

  defaultSelectBox
    .addClass("s-hidden")
    .wrap('<div class="cusSelBlock"></div>')
    .after('<div class="selectLabel"></div>')
    .next(".selectLabel")
    .text(defaultSelectBox.children("option").eq(0).text())
    .after(customList);

  for (var i = 0; i < numOfOptions; i++) {
    $("<li/>", {
      text: defaultSelectBox.children("option").eq(i).text(),
      rel: defaultSelectBox.children("option").eq(i).val()
    }).appendTo(customList);
  }

  $(".selectLabel").click(function () {
    $(this).toggleClass("active");
    if ($(this).hasClass("active")) {
      openList();
      focusItems();
    } else {
      closeList();
    }
  });

  $(".options li").on("keypress click", function (e) {
    e.preventDefault();
    $(".options li").removeClass("active");
    $(this).addClass("active");
    closeList();
    $(".selectLabel").removeClass("active").text($(this).text());
    defaultSelectBox.val($(this).text());
    $(".selected-item p span").text($(this).text());
  });
});

function openList() {
  $(".options")
    .children("li")
    .each(function (i) {
      $(this)
        .attr("tabindex", i)
        .css({
          transform: "translateY(" + i * 100 + "%)",
          "transition-delay": i * 30 + "ms"
        });
    });
}

function closeList() {
  $(".options").children("li").css({
    transform: "translateY(0)",
    "transition-delay": "0ms"
  });
  $(".options").children("li").eq(1).css("transform", "translateY(4px)");
  $(".options").children("li").eq(2).css("transform", "translateY(7px)");
}

function focusItems() {
  $(".options")
    .on("focus", "li", function () {
      $(this).addClass("active").siblings().removeClass();
    })
    .on("keydown", "li", function (e) {
      if (e.keyCode == 40) {
        $(this).next().focus();
        return false;
      } else if (e.keyCode == 38) {
        $(this).prev().focus();
        return false;
      }
    })
    .find("li")
    .first()
    .focus();
}

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/jquery/3.7.1/jquery.min.js