:root{
    /* Basic colors */
    --main-white: #f0f0f0;
    --main-red: #be3144;
    --main-blue: #3356a9;
    --main-gray: #37404b;
    --sec-blue: #7397ec;
    --sec-grey: #58606a;

    /* Font sizes */
    --fs-xlarge: clamp(2.5rem, 5vw, 5rem);   /* h1 */
    --fs-large: clamp(1.8rem, 4vw, 3rem);   /* h2 */
    --fs-medium: clamp(1.2rem, 2.5vw, 2rem); /* body text */
    --fs-small: clamp(1rem, 2vw, 1.2rem);   /* small text, links */

    /* Light theme (default) */
    --main-bg: #ffffff;
    --main-text: #1f1f1f;
    --accent: #3356a9;
    --highlight: #7397ec;

    /* Dark mode theme override */
    body.dark-mode {
      --main-bg: #1f1f1f;
      --main-text: #f0f0f0;
      --accent: #7397ec;
      --highlight: #3356a9;
    }
}
  
  *{
    margin: 0;
    padding: 0;
  }

  *, *::before, *::after {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    background-color: var(--main-bg);
    color: var(--main-text);
    font-size: var(--fs-md);
    transition: background-color 0.3s, color 0.3s;
  }
  
  a {
    color: var(--accent);
  }
  
  .nav {
    background-color: var(--accent);
  }
  
  .nav-list a:hover {
    background-color: var(--highlight);
  }
  
  .intro,
  .projects-section,
  .contact-section,
  footer {
    background-color: var(--main-bg);
    color: var(--main-text);
  }
  
  .nav{
    display: flex;
    justify-content: flex-end;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 70px;
    /*background: var(--main-blue);*/
    box-shadow: 0 2px 0 rgba(0, 0, 0, 0.4);
  }
  
  .nav-list{
    display: flex;
    margin-right: 3rem;
    align-items: center;
  }
  
  .nav-list a {
    display: block;
    font-size: var(--fs-medium);
    padding: 1.2rem;
    text-shadow: 2px 2px 1px #1f1f1f;
  }
  
  /*
  .nav-list a:hover{
    background: var(--sec-blue);
  }
  */
  
  ul{
    list-style: none;
  }
  
  a{
    text-decoration: none;
    /*color: var(--main-white);*/
  }
  
  h1{
    font-size: var(--fs-xlarge);
    /*color: var(--main-white);*/
  }
  
  .intro{
    width: 100%;
    height: 100vh;
    /*background-color: var(--main-gray);*/
    align-items: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-top: 70px;
  }
  
  .intro > p{
    font-size: var(--fs-medium);
    /*color: var(--main-white);*/
    font-style: italic;
  }
  
  .welcome-section{
    /*background-color: var(--main-blue);*/
    width: 100%;
    min-height: 100vh;
    align-items: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 4rem 2rem;
  }
  
  .welcome-section > h1{
    font-size: var(--fs-xlarge);
  }
  
  .welcome-section > h2{
    font-size: var(--fs-large);
    font-style: italic;
    /*color: var(--main-white);*/
  }
  
  .welcome-section > p{
    /*color: var(--main-white);*/
    font-size: var(--fs-medium);
    margin-top: 70px;
    margin-left: 100px;
    margin-right: 100px;
    line-height: 1.5;
  }

  .profile-image {
    height: 50%;
    border-radius: 120px;
    margin-top: 30px;
  }
  
  .projects-section{
    text-align: center;
    padding: 10rem 2rem;
    /*background-color: var(--main-gray);*/
    /*color: var(--main-white);*/
  }
  
  .projects-section-header{
    max-width: 640px;
    margin: 0 auto 6rem auto;
    border-bottom: 0.3rem solid var(--main-text);
  }

  .projects-section > h2{
    font-style: italic;
    font-size: var(--fs-medium);
    margin: 10px;
  }
  
  
  
  .projects-grid{
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    grid-gap: 4rem;
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    margin-bottom: 6rem;
  }
  
  
  
  .project-tile {
    /*background: var(--sec-grey);*/
    box-shadow: 4px 4px 4px 4px rgba(0, 0, 0, 0.5);
    border-radius: 2px;
    /*color: var(--main-white);*/
    padding: 1rem;
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
  }

  .project-tile:hover {
    transform: scale(1.03);
    transition: transform 0.3s ease;
  }
  
  .project-image {
    height: calc(100% - 6.8rem);
    width: 100%;
    object-fit: cover;
  }
  
  .contact-section {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    width: 100%;
    min-height: 80vh;
    padding: 4rem 2rem;
    /*background: var(--main-blue);*/
  }
  
  .contact-section-header > h2 {
    font-size: var(--fs-large);
    /*color: var(--main-white);*/
  }
  
  .contact-links {
    display: flex;
    justify-content: center;
    width: 100%;
    max-width: 980px;
    margin-top: 4rem;
    flex-wrap: wrap;
  }
  
  .contact-details {
    font-size: var(--fs-medium);
    text-shadow: 2px 2px 1px #1f1f1f;
    transition: transform 0.3s ease-out;
  }
  
  .btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 2px;
  }
  
  footer {
    font-weight: 300;
    display: flex;
    justify-content: space-evenly;
    padding: 0.3rem;
    /*background: var(--main-gray);*/
    border-top: 4px solid var(--sec-blue);
  }
  
  footer > p {
    margin: 2rem;
    font-size: var(--fs-small);
    /*color: var(--main-white);*/
  }
  
  footer i {
    vertical-align: middle;
  }
  
  @media (max-width: 28.75em) {
    footer {
      flex-direction: column;
      text-align: center;
    }
  }

  #theme-toggle {
    font-size: 1.5rem;
    margin: 1rem;
    padding: 0 1rem;
    background: none;
    border: 2px solid var(--highlight);
    color: var(--main-text);
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
  }

  .hover-expand > h3, p{
    color: var(--accent);
  }

  .hover-expand:hover{
    transform: scale(2.5);
    transition: transform 0.6s ease;
    z-index: 5;
  }