ایجاد یک نوار پیشرفت صفحه اسکرول تعاملی با CSS برای افزایش تعامل کاربر

<!-- tb is acronym for TechieBundle -->
<div class="tb-container-bar">
  <div class="tb-progress-bar"></div>
</div>
<div class="tb-wrapper">
  <header>
    <div class="tb-container">
      <a href="https://techiebundle.com">
        <img src="https://techiebundle.com/wp-content/uploads/2022/12/techiebundle-white-1-1.png" alt="Web Development Agency | TechieBundle" height="60" target="_blank">
      </a>
      <div class="nav navigation-wrapper">
        <ul class="nav-list">
          <li class="nav-link">Home</li>
          <li class="nav-link">About</li>
          <li class="nav-link">Portfolio</li>
          <li class="nav-link">Blog</li>
          <li class="nav-link">Contact</li>
        </ul>
      </div>
    </div>
  </header>

  <div class="tb-container tb-margin-top">
    <h1>Scroll Page Progress Bar with CSS (Scroll Down)</h1>
    <p>Lorem ipsum dolor, sit amet consectetur adipisicing elit. Illo commodi nesciunt maiores saepe? Repellat at quia dignissimos nobis, vitae cumque delectus dolorem totam cum. Voluptas quos delectus fuga dicta accusamus.
    </p>

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    </p>
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    </p>
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    </p>
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    </p>
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    <p>Lorem ipsum dolor sit amet consectetur, adipisicing elit. Animi ab officiis odit culpa vel! Temporibus, labore magnam alias sunt sint culpa, porro inventore pariatur modi explicabo omnis perspiciatis esse ipsa.</p>
    <br>
  </div>
  <br>
  <br>
</div>
<footer>
  <div class="copyright">
    © 2023 <a href="https://techiebundle.com" target="_blank">TechieBundle</a>. </div>
</footer>

@import url("https://fonts.googleapis.com/css?family=Asap|Playfair+Display+SC:900&display=swap");
@import url("https://fonts.googleapis.com/css2?family=Nunito:wght@200;400;500;600;700;900&display=swap");

html,
body {
  position: relative;
  height: auto;
  background: #fcfcfc;
  line-height: 180%;
  font-family: "Nunito", sans serif;
}
p {
  color: #474747;
  font-size: 14px;
}
h1{
  text-align:center;
}
.tb-margin-top {
  padding-top: 8em;
}
.tb-wrapper {
  position: relative;
  overflow: hidden;
  z-index: 3;
}
.tb-container {
  max-width: 920px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}
.tb-container > a > img {
  border-radius: 50%;
}
header > div {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 90px;
}
header {
  position: fixed;
  top: 0;
  width: 100%;
  background: #fcfcfc;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
.tb-container-bar:before {
  position: fixed;
  content: "";
  display: block;
  z-index: 2;
  border-left: 100vw solid white;
  border-right: 100vw solid white;
  border-bottom: calc(100vh - 92px) solid white;
  bottom: 0;
}
.tb-progress-bar {
  position: absolute;
  top: 92px;
  width: 100%;
  height: 100%;
  background-image: url(https://upload.wikimedia.org/wikipedia/commons/e/e0/Black_right_angled_triangle_2.png);
  background-repeat: no-repeat;
  background-attachment: scroll, fixed;
  background-size: 100% calc(100% - (100vh - 91px));
  z-index: 1;
}
footer {
  position: absolute;
  height: auto;
  width: 100%;
  background-color: #fcfcfc;
  text-align: center;
  line-height: 90px;
  z-index: 2;
  letter-spacing: 4px;
  bottom: -120px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
footer > .copywrite {
  letter-spacing: 1px;
}
.navigation-wrapper > ul {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2em;
}
.navigation-wrapper > ul > li {
  color: #474747;
  font-size: 1.25em;
  list-style: none;
  cursor: pointer;
  position: relative;
  font-weight: 500;
}
.navigation-wrapper > ul > li:hover::before {
  content: "";
  position: absolute;
  bottom: 0;
  height: 0;
  width: 0;
  z-index: 1;
  border-bottom: 2px solid #474747;
  animation: border-move 0.5s linear;
  animation-fill-mode: forwards;
}
@keyframes border-move {
  100% {
    width: 100%;
  }
}