/* Base reset */
* {
    margin: 0;
    padding: 0;
  }
  /* box-sizing and font sizing */
  *,
  *::before,
  *::after {
    box-sizing: inherit;
  }
  
  html {
    box-sizing: border-box;
  
    /* Set font size for easy rem calculations
     * default document font size = 16px, 1rem = 16px, 100% = 16px
     * (100% / 16px) * 10 = 62.5%, 1rem = 10px, 62.5% = 10px
    */
    font-size: 62.5%;
    scroll-behavior: smooth;
  }
  :root {
    --main-white: #f0f0f0;
    --main-red: #be3144;
    --main-blue: #45567d;
    --main-gray: #303841;
  } 
  .nav {
    display: flex;
    justify-content: flex-end;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: var(--main-red);
    box-shadow: 0 2px 0 rgba(0, 0, 0, 0.4);
    z-index: 10;
  }
  
  .nav-list {
    display: flex;
    margin-right: 2rem;
  }
  .nav-list a {
    display: block;
    font-size: 2.5rem;
    padding: 1rem;
  }
  @media (max-width: 28.75em) {
    .nav {
      justify-content: center;
    }
  
    .nav-list {
      margin: 0 1rem;
    }
  }
  h1,
  h2 {
    font-family: 'Raleway', sans-serif;
    font-weight: 700;
    text-align: center;
  }
  
  h2 {
    font-size: 4.2rem;
  }
  
  ul {
    list-style: none;
  }
  
  a {
    text-decoration: none;
    color: var(--main-white);
  }
  
  img {
    display: block;
    width: 100%;
  }
  
  .nav-list a:hover {
    background: var(--main-blue);
  }
  body {
    font-family: 'Poppins', sans-serif;
    font-size: 1.8rem; /* 18px */
    font-weight: 400;
    line-height: 1.4;
    color: var(--main-white);
  }
  .s1,.s3 {
    width: 100%;
    height: 100vh;
  }
  #welcome-section {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100vh;
    background-color: #000;
    background-image: linear-gradient(62deg, #3a3d40 0%, #181719 100%);
  }
  
  #welcome-section > p {
    font-size: 3rem;
    font-weight: 200;
    font-style: italic;
    color: var(--main-red);
    text-align: center;
  }
  
  h1 {
    font-size: 4rem;
    color: var(--main-white);
  }
  
  
  /* PROJECTS section */
  .projects-section {
    text-align: center;
    padding: 10rem 2rem;
    background: var(--main-blue);
  }
  .projects-header {
    max-width: 640px;
    margin: 0 auto 6rem auto;
    border-bottom: 0.2rem solid var(--main-white);
  }
  @media (max-width: 28.75em) {
    .projects-section-header {
      font-size: 4rem;
    }
  }
  
  /* "Automagic" image grid using no media queries */
  .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;
  }
  @media (max-width: 30.625em) {
    .projects-section {
      padding: 6rem 1rem;
    }
  
    .projects-grid {
      grid-template-columns: 1fr;
    }
  }
  .project {
    background: var(--main-gray);
    box-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
    border-radius: 2px;
  }
  .code {
    color: var(--main-gray);
    transition: color 0.3s ease-out;
  }
  .project:hover .code {
    color: #ff7f50;
  }
  .project-image {
    height: calc(100% - 6.8rem);
    width: 100%;
    object-fit: cover;
  }
  .project-title {
    font-size: 2rem;
    padding: 2rem 0.5rem;
  }
  
  /* BUTTON */
  .btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 2px;
  }
  
  .btn-show-all {
    font-size: 2rem;
    background: var(--main-gray);
    transition: background 0.3s ease-out;
  }
  
  .btn-show-all:hover {
    background: var(--main-red);
  }
  
  .btn-show-all:hover > i {
    transform: translateX(2px);
  }
  
  .btn-show-all > i {
    margin-left: 10px;
    transform: translateX(0);
    transition: transform 0.3s ease-out;
  }
  .tooltip {
    position: relative;
    display: inline-block;
    border-bottom: 0px dotted black;
  }
  
  .tooltip .tooltiptext {
    visibility: hidden;
    width: 120%;
    background-color: black;
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 5px 1px;
    font-size: 18px;
    
    /* Position the tooltip */
    position: absolute;
    z-index: 1;
    top: 100%;
    left: 30%;
    margin-left: -60px;
  }
  
  .tooltip:hover .tooltiptext {
    visibility: visible;
  }
  /* Contact section */
  
  .contact-section {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    width: 100%;
    height: 80vh;
    padding: 0 2rem;
    background: var(--main-gray);
  }
  
  .contact-section-header > h2 {
    font-size: 6rem;
  }
  
  @media (max-width: 28.75em) {
    .contact-section-header > h2 {
      font-size: 4rem;
    }
  }
  
  .contact-section-header > p {
    font-style: italic;
  }
  
  .contact-links {
    display: flex;
    justify-content: center;
    width: 100%;
    max-width: 1020px;
    margin-top: 4rem;
    flex-wrap: wrap;
  }
  
  .contact-details {
    font-size: 2.4rem;
    text-shadow: 2px 2px 1px #1f1f1f;
    transition: transform 0.3s ease-out;
  }
  
  .contact-details:hover {
    transform: translateY(8px);
  }
  
  /* Footer */
  
  footer {
    font-weight: 300;
    display: flex;
    justify-content: space-evenly;
    padding: 2rem;
    background: var(--main-gray);
    border-top: 4px solid var(--main-red);
  }
  
  footer > p {
    margin: 1rem;
    font-size: 1.5rem;
  }
  
  footer i {
    vertical-align: middle;
  }
  
  @media (max-width: 28.75em) {
    footer {
      flex-direction: column;
      text-align: center;
    }