Personal portfolio webpage

I am not able to solve the media query problem where a media query is required even though I have many media query.

Your portfolio should use at least one media query.

code :

<!DOCTYPE html>
<html lang="en" dir="ltr">

<head>
  <meta charset="utf-8">
  <title>Abh1sh3k</title>
  <link rel="stylesheet" href="styleportfolio.css">
  <script src="https://kit.fontawesome.com/9bdc14e1a0.js" crossorigin="anonymous"></script>
  <link rel="preconnect" href="https://fonts.googleapis.com">
  <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
  <link href="https://fonts.googleapis.com/css2?family=Anton&family=Courier+Prime:wght@700&display=swap" rel="stylesheet">
  <link rel="preconnect" href="https://fonts.googleapis.com">
  <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
  <link href="https://fonts.googleapis.com/css2?family=Anton&family=Montserrat&display=swap" rel="stylesheet">
  <meta content="width=device-width, initial-scale=1" name="viewport" />
</head>

<body>
  <nav id="navbar">
    <i class="fa-solid fa-a"></i>
    <div class="options">
      <h5><a href="#projects">Works</a></h5>
      <h5><a href="#about">About me</a></h5>
    </div>
  </nav>
  <div class="side-L-shape">


  </div>
  <section id="welcome-section">
    <div class="intro">
      <h1 class="my-name">Hello.</h1>
      <h2 class="my-name">
        <<span class="txt-type" data-wait="3000" data-words='["I am Abhishek.>", "/An Aspiring Web-Developer...>"]'></span>
      </h2>
      <p class="intro-para">Aligned with the belief that life is a journey of learning.</p>
    </div>
    <div class="side-down-L-shape">


    </div>
  </section>





  <section id="projects">
    <div class="project-tiles">
      <div class="project">
        <div class="number-sec">
          <h1 class="project-no">01</h1>
          <div class="vertical-line">
          </div>
        </div>
        <a href="#"></a>
        <div class="project-name">
          <h2 class="project-title"><b>Shopping Web-App with cart facilities.</b></h2>
          <div class="project-desc-link">
            <h3 class="project-desc">Using html, css, bootstrap and Vanilla JS.</h3>
            <button class="project-link-btn" type="button" name="button">Link</button>
          </div>
        </div>
      </div>
      <div class="image">
        <img class="image-tile" src="media\Screenshot (9).png" alt="">
      </div>
    </div>



    <div class="project-tile">
      <div class="project">
        <div class="number-sec">
          <h1 class="project-no">02</h1>
          <div class="vertical-line">
          </div>
        </div>
        <div class="project-name">
          <h2 class="project-title"><b>A unique Tinder-like Website for Dogs !</b></h2>
          <div class="project-desc-link">
            <h3 class="project-desc">Using html, css and Bootstrap as part Angela Yu's Udemy Web-Development Bootcamp.</h3>
            <button class="project-link-btn" type="button" name="button">Link</button>
          </div>
        </div>
      </div>
      <div class="image">
        <img class="image-tile" src="media\tindog.png" alt="">
      </div>
    </div>


    <div class="project-tiles">
      <div class="project">
        <div class="number-sec">
          <h1 class="project-no">03</h1>
          <div class="vertical-line">
          </div>
        </div>
        <div class="project-name">
          <h2 class="project-title" onclick="window.open('https://codepen.io/abhishek0888/pen/gOGqxma','_blank');"><b>A Product Landing Page to sell Tour Plans to Mountains.</b></h2>
          <div class="project-desc-link">
            <h3 class="project-desc">Using html, css and Bootstrap.</h3>
            <button class="project-link-btn" type="button" name="button">Link</button>
          </div>
        </div>
      </div>
      <div class="image">
        <img class="image-tile" src="media\product-landing-page(10).png" alt="">
      </div>
    </div>
  </section>


  <section id="about">
    <div class="me">
      <img class="my-image" src="media\IMG-20220327-WA0049.jpg" alt="">
    </div>
    <div class="about-me">
      <h4>Hey there, I am Abhishek Keshri.</h4>
      <div class="about-me-desc">
        <p class="about-me-para"> &#9864; &ensp;I am currently pursuing Bachelor's in Technology from Sarala Birla University.<br> &#9864; &ensp; I have great interest in UI/UX designing to enhance the user experience and leave a good impression on
          the user.<br>
          &#9864; &ensp;Implementing the designs/wire-framing into actual website/web-app is another area where I'm interested in.<br>&#9864; &ensp; My goal is to gather more experience and get better in the area of Full-Stack Development.</p>
      </div>
    </div>
    <div class="skills">
      <h2>Skilled Areas</h2>
      <div class="horizontal-line">

      </div>
      <div class="skills-icons">
        <div class="icon-div">
          <img class="html5 icon" src="media\html5icon.png" alt="">
          <h5>HTML</h5>
        </div>

        <div class="icon-div">
          <img class="icon css" src="media\css-icon-png-0.jpg" alt="">
          <h5>CSS</h5>
        </div>

        <div class="icon-div">
          <img class="javascript icon" src="media\javascript-vector-logo-yellow-png-transparent-javascript-vector-12.png" alt="">
          <h5>Javascript</h5>
        </div>

        <div class="icon-div">
          <img class="icon bootstrapicon" src="media\boostrapicon.png" alt="">
          <h5>Bootstrap</h5>
        </div>

        <div class="icon-div">
          <img class="icon react" src="media\React-icon.png" alt="">
          <h5>REACT.js</h5>
        </div>
      </div>
    </div>
    <h5 class="istyle"><em>More coming soon...</em></h5>
  </section>

  <section id="contact">
    <h2 class="contact-title">
      Let's Connect
    </h2>
    <div class="horizontal-line">

    </div>
    <div class="contact-tiles">
      <div style="cursor: pointer;" onclick="window.open('https://github.com/abhishekZ911','_blank');" class="contact-tile">
        <img class="cicon gh" src="media\icons8-github.gif" alt="">
        <h5>Github</h5>
      </div>
      <div class="contact-tile">
        <img class="li cicon" src="media\icons8-linkedin.gif" alt="">
        <h5>LinkedIn</h5>
      </div>
      <div class="contact-tile">
        <img class="in cicon" src="media\icons8-instagram.gif" alt="">
        <h5><a id="profile-link" href="#" target="_blank">Instagram</a></h5>
      </div>
    </div>
    <div class="email">
      <a href="https://mail.google.com/mail/?view=cm&fs=1&to=abhikeshri0888@gmail.com" class="email-id">Click here to email me : abhikeshri0888@gmail.com</a>
    </div>
  </section>
  <div class="inverted-L-shape">
  </div>
  <script src="portfolio.js" type="text/javascript">

  </script>
</body>

</html>

css :

body{
  background-color:black;
  background-image:
  radial-gradient(white, rgba(255,255,255,.2) 4px, transparent 1px),
  radial-gradient(white, rgba(255,255,255,.15) 1px, transparent 2px),
  radial-gradient(white, rgba(255,255,255,.1) 3px, transparent 3px),
  radial-gradient(rgba(255,255,255,.4), rgba(255,255,255,.1) 2px, transparent 4px);
  background-size: 460px 460px, 440px 440px, 220px 220px, 170px 170px;
  background-position:0 0, 40px 60px, 130px 270px, 70px 100px;
}
#navbar{
  position: absolute;
  top: 0;
  z-index: 2;
  margin-top: 2%;
  padding: .5rem 8rem .5rem 4rem;
  background-color: transparent;
  position: relative;
  color: white;
  display: flex;
  flex-direction: row;
  justify-content: space-between;
}
@media only screen and (max-width: 440px)
{
  #navbar{
    display: none;
    background-color: lightblue;
  }
}

.side-L-shape{
  position: absolute;
  top: 13px;
  right: 20px;
  border: 5px solid rgb(236,204,178,0.2);
  border-top-right-radius: 10px;
  border-bottom-style: none;
  border-left-style: none;
  background: transparent;
  width: 35%;
  height: 40%;
}
@media (max-width: 440px){
  .side-L-shape{
    position: relative;
    left: 56%;
    top: -38px;
    height: 255px;
    width: 40%
  }
}
.side-down-L-shape{
  position: relative;
  right: 170px;
  bottom: 295px;
  margin-left: 1% !important;
  border: 5px solid rgb(236,204,178,0.2);
  border-bottom-left-radius: 10px;
  border-top-style: none;
  border-right-style: none;
  background: transparent;
  width: 35%;
  height: 270px;
}
@media (max-width: 440px){
  .side-down-L-shape{
    display : none ;
  }
}

.options{
  width: 20%;
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  font-size: 1.2rem;
  font-family: 'Montserrat', sans-serif;
}

.options a{
  text-decoration: none;
  color: #FFDEB4;
  letter-spacing: 1px;
}

.options a:hover{
  text-decoration: underline;
}
@media (max-width: 450px){
  .options {width: 50%;
    font-size: .7rem;
    color: black;
  }
  .options a{
  display: none;
  }
}


.fa-solid{
  font-size: 0px;
}
#welcome-section{
margin: 10% 0% 0% 13%;
}
@media (max-width: 450px){
  #welcome-section{
    position: relative;
    bottom: 170px;
    margin: 40% 0% 38% 2%;
    bottom:
  }
}
.intro{
  color: white;
}

@media (max-width: 440px){
.intro h2{
  height: 100px;
}
}


.my-name{
  font-size: 2.5rem;
  color: white;
  font-family: 'courier prime', monospace;
  margin-bottom: 4%;
}


@media (max-width: 450px){
  .my-name{
    font-size: 1.5rem;
    margin-bottom: 5%;
  }
}
.intro-para{
  margin: 10% 0;
  font-size: 1.3rem;
  font-family: 'Montserrat', sans-serif;
  color: #ECCCB2;
  font-weight: Light
}

@media (max-width: 450px){
  .intro-para{
    margin-top: 4% !important;
    margin-bottom: 15%;
    font-size: .7rem;
    padding-top: 5%;


  }
}

#projects{
  background: relative;
  top: -10%;
  color: white;
  margin: 0% 0% 8% 7%;
  padding-bottom: 1%;
}
@media(max-width: 440px){
  #projects{
    margin-left: 3%;
    position: relative;
    top: -100px;
  }
}

.project-tile{
  margin-top: 15%;
  margin-bottom: 12%;
}

.project{
  display: flex;
  justify-content: flex-start;
}
.number-sec{
  width: 17%;
  display: flex;
  justify-content: space-around;
}
.vertical-line{
  height: 180px;
  border-left: 1px solid white;
}

@media (max-width: 440px) {
  .vertical-line{
    height: 140px;
  }
}

.project-no{
  display: flex;
  align-items: center;
  font-size: 3rem;
  color: #FFDEB4;
  padding-right: 5%;
}

@media (max-width: 440px) {
  .project-no{
    font-size: 2.5rem;
  }
}
.project-name{
  width: 70%;
  font-size: 1.3rem;
  display: flex;
  flex-direction: column;
  justify-content:space-around;
}

@media (max-width: 440px){
  .project-name{
    font-size: .7rem;
  }
}
.project-name h2, h3  {
  margin: 0%;
  font-family: 'Montserrat', sans-serif;
  font-weight: Light;
}

@media (max-width: 440px) {
  .project-name{
    padding-left: 2%;
  }
}
.project-title{
  padding-top: 2.5%;
  cursor: pointer;
}
.hide{
  display: none;
}

.project-desc-link{
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items:flex-end;

}
.project-link-btn{
  border-radius: 0px;
  padding: 0% 4% 0%;
  letter-spacing: 2px;
  font-size: 1.1rem;
  color: white;
  border: 1px solid white;
  background: black;
  cursor: pointer;
  height: 40px;
}

@media(max-width: 440px){
  .project-link-btn{
    font-size: .5rem;
    text-align: center;
    padding: 0% 1% 0%;
    height: 17px;
  }
}

.project-link-btn:hover{
  color: black;
  background: white;
  opacity: .7;
}

.project-desc{
  padding-bottom: 2.5%;
  font-size: 1.1rem;
}


@media (max-width: 440px){
  .project-desc{
    font-size: .6rem;
  }
}
div.image{
  padding: 5% 0% 0% 15%;
  display: flex;
  justify-content: center;
  margin-left: -15%;
}

@media (max-width: 440px) {
  div.image{
    padding-top: 20%;
    padding-bottom: 17%;
  }
}
.image-tile{
  width: 55%;
  border-radius: 7px;
}

@media (max-width: 440px){
  .image-tile{
    width: 80%;
  }
}

#about{
  padding-top: 4%;
}
@media(max-width: 440px){
  #about{
    position: relative;
    top: -70px;
  }
}
.me{
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
}
.my-image{
  width: 17%;
  border-radius: 50%;
}

@media (max-width: 440px) {
  .my-image{
    width: 25%
  }
}

.hi-again{
  color: white;
  margin-top: 3%;
}

.about-me h4{
  color: #FFE3D8;
  text-align: center;
  font-family: Montserrat;
  font-size: 1.8em;
  margin: 4% 0% 3%;
}

@media (max-width: 440px){
  .about-me h4{
    font-size: 1rem;
  }
}
.about-me-desc{
  /* filter: blur(8px); */
  border-radius: 9px;
  opacity: .8;
  padding: 1%;
  margin: 5% 15% 0% 16%;
}
@media (max-width: 440px) {
  .about-me-desc {
    margin: 10% 0% 0%;
    border-radius: 0px;
    padding: 0% !important;
    width: 100% !important;
  }
}

.about-me-para{
  opacity: 1 !important;
  line-height: 250%;
  color: white;
  font-family: 'Montserrat';
  font-size: 1.1rem;
}

@media (max-width: 440px){
  .about-me-para{
    font-size: .6rem;
  }
}
.skills{
  color:  #FFE3D8;
  margin-top: 7%;
  text-align: center;
  font-size: 1.2em;
  font-family: Montserrat;
  padding-bottom: 5%;
}
.skills h2{
  padding: 1% 0% 0%;
  margin-bottom: 0.3%;
}

@media (max-width: 440px) {
    .skills h2{
      font-size: .9rem;
    }
}
.skills-icons{
  color: white;
  margin: auto;
  width: 75%;
  display: flex;
  flex-direction: row;
  justify-content: space-around;
  align-items: center;
}

@media(max-width: 440px){
  .skills-icons{

    /* width: 60%; */
    width: 60%;
    height: 40%;
    align-items: flex-end;
    flex-wrap: wrap;
  }
  .icon-div h5{
    font-size: .5rem;
  }

}
.icon{
  width: 40px;
}
.html5{
  width: 65px;
}
.bootstrapicon{
  width: 55px;
}

.javascript{

}

.icon-div:nth-of-type(2){
  /* padding-left: 5px; */
}
@media (max-width: 440px) {
  .html5{width: 50px;
          margin-top: 1%;}
  .css{width: 33px;}
  .javascript{width: 32px;}
  .boostrapicon{width: 45px}
}

.istyle{
  position: relative;
  bottom: 60px;
  opacity: 0.6;
  text-align: center;
  color: #FFDEB4;
  font-size: 1rem;
  font-family: cursive;
  padding-top: 0;
}
@media (max-width: 440px) {
  .istyle{
    bottom: 0px;
    font-size: 0.4rem;
}
#contact{
  position: relative;
  top: -25px;
}
}

.contact-title{
  font-size: 1.6rem;
  color: #FFE3D8;
  font-family: Montserrat;
  text-align: center;
margin-bottom: 0.3%;}


@media (max-width: 440px){
  .contact-title{
    font-size: .9rem;
  }
}
.contact-tiles{
  width: 37%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: auto;
  padding-bottom: 3%;
}

.cicon{
  width: 40px;
  border-radius: 13px;
}
.contact-tile{
  display: flex;
  flex-direction: column;
  align-items: center;
}
.contact-tile h5{
  color: white;
  font-size: .9rem;
  text-align: center;
}
@media (max-width: 440px){
  .contact-tiles{
    width: 70%;
    display: flex;
    flex-direction: column;
  }
  .contact-tile{
    width: 40%;
    height: 26px;
    flex-direction: row;
    justify-content: flex-start;
  }
  .cicon{
    width: 23px;
    border-radius: 4px;
  }
  .contact-tile h5{
    padding-left: 17%;
  }
}

.email{
  margin: auto;
  width: 25%;
  text-align: center;
  font-size: 1.2rem;
  font-family: monospace;
  background: #9ED2C6;
  opacity: .8;
  border-radius: 4px;
  margin-bottom: 15px;
}
@media(max-width: 440px){
.email  {
  width: 70%;
  font-size: .6rem;
}
}

.email-id{
  text-decoration: none;
  color: black;
}

.horizontal-line{
  margin: auto;
  width: 20%;
  border: .5px solid white;
  margin-bottom: 5%;
}

@media(max-width: 440px){
  .horizontal-line{
    width: 40%;
  }
}

/* @media (max-width: 440px){
.inverted-L-shape{
    position:relative;
    z-index: 3;
    top: 425%;
    bottom: 5px;
    left: 12px;
    border: 5px solid rgb(236,204,178,0.4);
    border-bottom-left-radius: 10px;
    border-top-style: none;
    border-right-style: none;
    background: transparent;
    width: 35%;
    height: 60%;
}
} */

I have tried many attempts but to not avail.

The CSS file you link to has to be named styles.css

<link rel="stylesheet" href="styles.css">