rainyday.dev/freecodcamp/build-a-product-landing-page/styles.css

:root {
    --page-color: #393e46;
    --accent-color: #f96d00;
    --text-color: #f2f2f2;
  }
  
  *, ::before, ::after {
    margin: 0;
    padding: 0;
  }
  
  body {
    height: 100vh;
    width: auto;
    background-color: var(--page-color);
    color: var(--text-color);
      font-family: "Quicksand", sans-serif;
    font-optical-sizing: auto;
    font-weight: 400;
    font-style: normal;
    
  }
  
  html {
    font-size: 16px;
  }
  
  h3 {
    font-size: 1.25rem;
  }
  
  #header {
    position: sticky;
    top: 0;
    background-color: var(--page-color);
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 5rem;
    max-height: 5rem;
  }
  
  #header p {
      font-family: "Rubik", sans-serif;
    font-optical-sizing: auto;
    font-weight: 700;
    font-style: normal;
  }
  
  
  #header-img {
    height: 100%;
    width: auto;
    border-radius: 100%;
  }
  
  #nav-bar ul {
    display: flex;
    list-style-type: none;
  }
  
  #nav-bar li {
    padding: 0.25rem;
  }
  
  #nav-bar a {
    text-decoration: none;
    color: var(--white);
  }
  
  #nav-bar a:hover {
    text-decoration: underline;
  }
  
  #product-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.25rem;
  }
  
  .product-info h1 {
    margin-bottom: 0.5rem;
  }
  
  .selling-points-list {
    list-style-type: none;
    font-size: 1.15rem;
  }
  
  .selling-points-list li {
    margin-bottom: 0.5rem;
  }
  
  .selling-points-list li:last-of-type {
    margin-bottom: 0;
  }
  
  #advert {
    margin-top: 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }
  
  #form {
    margin-top: 1rem;
    height: 20%;
    width: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }
  
  label[for="email"] {
    font-size: 1.2rem;
  }
  
  input[id="email"] {
    width: 18rem;
  }
  
  input[id="submit"] {
    background-color: var(--accent-color);
    border: 0;
    border-radius: 10px;
    padding: 8px;
    width: 8rem;
    max-width: 8rem;
    font-weight: bold;
    font-size: 1rem;
  }
  
  @media only screen and (max-width: 1000px) {
    #nav-bar ul {
      flex-direction: column;
    }
  }
  
  @media only screen and (max-width: 400px) {
    #header {
      margin-bottom: 1rem
    }
  }