A Code by Iann

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<body class="scissors">
  <div class="envelop">
    <div class="envelop__front-paper"></div>
    <div class="envelop__back-paper"></div>
    <div class="envelop__up-paper js-up-paper"></div>
    <div class="envelop__sticker js-sticker"></div>
    <div class="envelop__false-sticker"></div>
    <div class="envelop__content js-envelop-content">
      <div class="love-notes">
        <div class="note js-note">
          <div class="note__text">
            <p>
              Hi Angela I just want to confess something na............I really really love you angela miss ko na yung dating usapan natin, yung dating us and I am sorry dati dahil baka naisip mo na nawalan ako ng feelings sayo pero di yun genon ha di ko kasi alam na yung dad mo pala ay hawak lang yung messenger mo kala ko kasi buong phone eh pero can we try again?.
            </p>
          </div>
        </div>
        <div class="note js-note">
          <div class="note__text">
            <p>kala ko non dati makakamusad na ako sayo non pero di pa pala kahit my friends are telling me na "Iann move on kana diyan may bago na yan oh" I really still cant move on angela,I still really love you so much. nagustuhan kita non dati di lang sa mga looks mo kundi sa personalities mo you're an angel of god super bait superr caring and yeah I like your imperfections your flaws, your vibes,</p>
          </div>
        </div>
        <div class="note js-note">
          <div class="note__text">
            <p>your stylee and mostly yourr smileee hinding hindi ka mawala sa isipann ko angelaaaa and il always be your kakampi you have me that is always proud to you pag sad ka edi sad din ako HAHAHAH chareng pero you dont need naman na balikan ako I just want to let this feelings out its always your choice listen to your heart  .</p>
            <p>.</p>
          </div>
        </div>
      </div>
    </div>
  </div>
</body>

</html>
  <script src='https://cdnjs.cloudflare.com/ajax/libs/gsap/3.6.0/gsap.min.js'></script><script  src="./script.js"></script>

</body>
</html>

CSS

* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  width: 100%;
  background-color: #dd84d3;
  font-size: 20px;
  display: flex;
  justify-content: center;
  align-items: center;
}
@media (max-height: 500px) {
  body {
    margin: 25% 0 25% 0;
  }
}

.envelop {
  width: 15rem;
  height: 10rem;
  position: absolute;
  left: 0;
  right: 0;
  margin: auto;
}
@media (min-width: 400px) and (max-width: 600px) {
  .envelop {
    width: 20rem;
    height: 15rem;
  }
}
@media (min-width: 600px) {
  .envelop {
    width: 25rem;
    height: 20rem;
  }
}
@media (min-width: 600px) and (min-height: 600px) {
  .envelop {
    bottom: 20%;
  }
}
.envelop__front-paper {
  width: 100%;
  height: 100%;
  bottom: 0;
  left: 0;
  position: absolute;
  border-radius: 0.7rem;
  border: 0.35rem solid #967b5c;
  background-color: #ba9872;
  clip-path: polygon(100% 0%, 50% 70%, 0% 0%, 0% 100%, 100% 100%);
  z-index: 300;
}
.envelop__back-paper {
  width: 100%;
  height: 100%;
  bottom: 0;
  left: 0;
  position: absolute;
  border-radius: 0.7rem;
  background-color: #967b5c;
  clip-path: polygon(0% 0%, 100% 0%, 90% 100%, 0% 90%);
  z-index: 100;
}
.envelop__up-paper {
  width: 100%;
  height: 100%;
  bottom: 0;
  left: 0;
  position: relative;
  border-radius: 0.7rem;
  background-color: #967b5c;
  z-index: 400;
  clip-path: polygon(0% 0%, 100% 0%, 50% 81%);
}
.envelop__sticker {
  width: 100%;
  height: 20%;
  position: absolute;
  margin: auto;
  top: 30%;
  left: 0;
  bottom: 0;
  right: 0;
  z-index: 400;
  background-image: url("https://www.freepnglogos.com/uploads/heart-png/emoji-heart-33.png");
  background-color: #f9f9f9;
  border: 0.3rem solid #e2e2e2;
  background-size: 2rem;
  background-position: center;
}
@media (max-width: 400px) {
  .envelop__sticker {
    background-size: 1.2rem;
  }
}
@media (min-width: 600px) {
  .envelop__sticker {
    height: 15%;
  }
}
.envelop__false-sticker {
  width: 20%;
  height: 20%;
  position: absolute;
  margin: auto;
  top: 30%;
  left: 80%;
  bottom: 0;
  right: 0;
  z-index: 300;
  background-image: url("https://www.freepnglogos.com/uploads/heart-png/emoji-heart-33.png");
  background-color: #f9f9f9;
  border: 0.3rem solid #e2e2e2;
  background-size: 2rem;
  background-position: center;
}
@media (max-width: 400px) {
  .envelop__false-sticker {
    background-size: 1.2rem;
  }
}
@media (min-width: 600px) {
  .envelop__false-sticker {
    height: 15%;
  }
}
.envelop__content {
  width: 100%;
  height: 100%;
  bottom: 0;
  left: 0;
  position: absolute;
  z-index: 200;
}
.love-notes {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.note {
  width: 95%;
  height: 30%;
  background-color: #f9f9f9;
  position: absolute;
  overflow: hidden;
  transition: height 0.5s, opacity 0.25s;
  box-shadow: 0px 0px 5px 0px rgba(0, 0, 0, 0.75);
}
.note:nth-child(1) {
  bottom: 60%;
}
.note:nth-child(2) {
  bottom: 40%;
}
.note:nth-child(3) {
  bottom: 20%;
}
.note:hover {
  cursor: pointer;
  height: 45%;
}
.note__text {
  font-family: "Sofia";
  padding: 1rem;
}
.note__text p {
  font-size: 0.9rem;
  margin-bottom: 1rem;
  text-align: center;
}
@media (min-width: 300px) and (max-width: 600px) {
  .note__text p {
    font-size: 1.025rem;
  }
}
@media (min-width: 600px) {
  .note__text p {
    font-size: 1.15rem;
  }
}

.scissors {
  cursor: url("https://i.postimg.cc/GtLCdKxR/sisors.png"), pointer;
}
.scissors:active {
  cursor: url("https://i.postimg.cc/GtXQ7WPZ/pngwing-com.png"), pointer;
}

.cursor {
  cursor: pointer;
}

JS

let mobile_media_query = window.matchMedia("(max-width: 400px)");
let tablet_media_query = window.matchMedia(
  "(min-width: 400px) and (max-width: 600px)"
);
const notes = document.querySelectorAll(".js-note");

//-> Main function that enables all the notes.
function notes_ready() {
  gsap.to(".js-envelop-content", {
    height: "110%",
    duration: 0.5
  });

for (let i = 0; i < notes.length; i++) {
    notes[i].addEventListener("click", function () {
      if (mobile_media_query.matches) {
        if (this.classList.contains("active")) {
          this.classList.remove("active");
          gsap.set(this, {
            height: "30%",
            clearProps: "all"
          });
        } else {
          for (let i = 0; i < notes.length; i++) {
            if (notes[i].classList.contains("active")) {
              notes[i].classList.remove("active");
              gsap.set(notes[i], {
                height: "30%",
                clearProps: "all"
              });
            }
          }
          this.classList.add("active");
          gsap.set(this, {
            height: 125 + 40 * i + "%"
          });
        }
      } else if (tablet_media_query.matches) {
        if (this.classList.contains("active")) {
          this.classList.remove("active");
          gsap.set(this, {
            height: "30%",
            clearProps: "all"
          });
        } else {
          for (let i = 0; i < notes.length; i++) {
            if (notes[i].classList.contains("active")) {
              notes[i].classList.remove("active");
              gsap.set(notes[i], {
                height: "30%",
                clearProps: "all"
              });
            }
          }
          this.classList.add("active");
          gsap.set(this, {
            height: 80 + 21 * i + "%"
          });
        }
      } else {
        if (this.classList.contains("active")) {
          this.classList.remove("active");
          gsap.set(this, {
            height: "30%",
            clearProps: "all"
          });
        } else {
          for (let i = 0; i < notes.length; i++) {
            if (notes[i].classList.contains("active")) {
              notes[i].classList.remove("active");
              gsap.set(notes[i], {
                height: "30%",
                clearProps: "all"
              });
            }
          }
          this.classList.add("active");
          gsap.set(this, {
            height: 70 + 20 * i + "%"
          });
        }
      }
    });
  }
}

//-> Function that set up the up paper of the envelope.
function set_up_paper() {
  var arr = [0, 0, 100, 0, 50, 61];
  gsap.set(".js-up-paper", {
    bottom: "97%",
    rotation: 180,
    zIndex: 200,
    clipPath:
      "polygon(" +
      arr[0] +
      "%" +
      arr[1] +
      "%," +
      arr[2] +
      "%" +
      arr[3] +
      "%," +
      arr[4] +
      "%" +
      arr[5] +
      "%)",
    onComplete: notes_ready
  });
}

//-> Function that starts the up paper transition.
function envelop_transition() {
  gsap.to(".js-up-paper", {
    bottom: "1%",
    duration: 0.25,
    onComplete: set_up_paper
  });
  document
    .querySelector(".js-up-paper")
    .removeEventListener("click", envelop_transition);
  document.querySelector(".js-up-paper").classList.remove("cursor");
}

//-> Function that allows cut the sticker.
function sticker() {
  gsap.set(".js-sticker", { width: "20%", left: "-80%" });
  document.body.classList.remove("scissors");
  document.querySelector(".js-sticker").removeEventListener("click", sticker);
  document
    .querySelector(".js-up-paper")
    .addEventListener("click", envelop_transition);
  document.querySelector(".js-up-paper").classList.add("cursor");
}

document.querySelector(".js-sticker").addEventListener("click", sticker);

window.onresize = function (event) {
  recize_notes();
};

A Code by Iann

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