:root {
  --bg-primary: #FFFFFF;
  --bg-secondary: #f9fafb;
  --text-primary: #343434;
  --text-primary-invert: #f9fafb;
  --text-secondary: #9ca3af;
  --text-accent: #f97316;
  --footer-bg: #111827;
  --border-radius: 0.5rem;
  --transition-duration: 0.3s;
  --bottom-shadow: 4px 4px 10px rgba(0, 0, 0, 0.1);
  --smooth-shadow: 0 8px 14px 0 rgba(0, 0, 0, 0.08);

  --red: #AA3333;
  --orange: coral;
  --blue: cornflowerblue;
  --green: #77cfa5;
  --grey: #AAAAAA;
}

html,
body {
  scroll-behavior: smooth;
  font-family: ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  margin: 0;
  padding: 0;
  color: var(--text-primary);
}

#vanta-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  background-color: #111827;
  min-height: 100vh;
}

pre {
  text-wrap: auto;
  background-color: var(--text-primary);
  padding: 1rem;
  border-radius: var(--border-radius);
  box-shadow: var(--bottom-shadow);
  font-size: 0.875rem;

  code {
    color: var(--text-primary-invert);

    span {
      color: var(--green);
    }
  }
}


.hidden {
  display: none;
}

.gradient-text {
  background-clip: text;
  color: transparent;
  background-image: linear-gradient(to right, #f97316, #7c3aed);
}


.button {
  background-color: var(--text-accent);
  color: var(--text-primary-invert);
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  font-size: 1rem;
  transition: background-color var(--transition-duration);
  text-decoration: none;
  display: inline-block;

  .feather {
    vertical-align: middle;
    margin-left: 0.1rem;
    height: 1rem;
  }

  &:hover {
    box-shadow: 0 4px 14px 0 rgba(249, 115, 22, 0.69);
  }
}

.picto {
  display: flex;
  justify-content: center;
  align-items: center;
  border-radius: 100%;
  width: 3.5rem;
  height: 3.5rem;

  &.red {
    color: var(--red);
    background-color: hsl(from var(--red) h s calc(l*1.4));
  }

  &.blue {
    color: var(--blue);
    background-color: hsl(from var(--blue) h s calc(l*1.4));
  }

  &.orange {
    color: var(--orange);
    background-color: hsl(from var(--orange) h s calc(l*1.4));
  }

  &.green {
    color: var(--green);
    background-color: hsl(from var(--green) h s calc(l*1.4));
  }

  &.grey {
    color: var(--grey);
    background-color: hsl(from var(--grey) h s calc(l*1.4));
  }
}

nav {
  width: 100%;
  flex-direction: row;

  .nav-links {
    display: none;
    gap: 1.5rem;

    a,
    a:visited {
      .feather {
        vertical-align: middle;
        margin-right: 0.25rem;
        height: 1rem;
      }

      transition: color .2s ease-in-out;
      text-decoration: none;
      color: var(--text-primary);

      &:hover {
        color: var(--text-accent);
      }
    }
  }

  #navbar {
    max-width: 80rem;
    margin: 0 auto;
    display: flex;
    padding: 1rem 0;
    justify-content: space-between;

    img {
      height: 40px;
    }
  }
}

#hero {
  overflow: hidden;
  position: relative;
  padding: 6rem 1rem 8rem 1rem;

  #hero-content {
    h1 {
      font-size: 3.75rem;
      margin-bottom: 1rem;
    }

    max-width: 80rem;
    margin: 0 auto;
    position: relative;
    text-align: center;
    color: var(--text-primary-invert);

    p {
      font-size: 2rem;
    }
  }
}

section {
  padding: .5rem 0.5rem;

  >div {
    margin: 0 auto;
    max-width: 80rem;
    margin-bottom: 4rem;
  }

  >div:nth-child(1) {
    text-align: center;

    h2 {
      font-size: 2rem;
    }
  }
}



.diapo {
  display: flex;
  flex-wrap: wrap;

  >div {
    border: 1px solid rgba(from var(--text-primary) / 0.3);
    display: flex;
    flex-direction: column;
    border-radius: 1rem;
    background-color: var(--bg-secondary);
    padding: 0.2rem 1rem;
    transition: all .3s ease-in-out;
    flex: 1;
    min-width: 15rem;

    p {
      flex-grow: 1;
    }

  }


  .action {
    justify-self: center;
    align-self: center;
    margin-bottom: 1rem
  }
}

#demo {
  .video-player {
    width: 65%;
    margin: 0 auto;
    height: 26rem;
    box-shadow: 0 0 12px rgba(0, 0, 0, 0.5);
    border-radius: 1rem;
  }
}

#tutorials {
  .video-player {
    width: 85%;
    margin: 0 auto;
    height: 16rem;
  }

  .diapo {
    text-align: center;
  }

}

#cta {
  padding: 4rem 1rem;
  background: linear-gradient(to right, #f97316, #7c3aed);

  h2 {
    color: var(--text-primary-invert);
  }

  color: var(--text-primary-invert);

  .button {
    background-color: var(--text-primary-invert);
    color: var(--text-primary);
    font-weight: bold;
  }
}

footer {
  padding-top: 1rem;
  background-color: var(--footer-bg);
  color: var(--text-primary-invert);

  ul,
  li {
    list-style: none;
    padding: 0;
  }

  a,
  a:visited {
    color: var(--text-secondary);
    text-decoration: none;

    &:hover {
      text-decoration: underline;
    }
  }

  .diapo {
    max-width: 80rem;
    margin: 0 auto;
  }

  .diapo>div {
    background-color: transparent;

    &:hover {
      box-shadow: none;
    }
  }

  .logo img {
    height: 3rem
  }

  .feather {
    margin-right: 0.5rem;
    justify-self: center;
    height: 2rem;
  }

  .copyright {
    text-align: center;
    padding: 1rem 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
  }
}

.video-player iframe {
  width: 100%;
  height: 100%;
  border-radius: 1rem;
}


#mobile-menu-button {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 30;

  .feather {
    height: 2rem;
    color: var(--text-primary);
  }
}

#mobile-menu {
  position: absolute;
  background-color: var(--bg-primary);
  width: 100%;
  z-index: 20;

  a,
  a:hover,
  a:visited {
    display: block;
    padding: 1rem;
    border-bottom: 1px solid var(--text-secondary);
    text-decoration: none;
    color: var(--text-primary);
  }

  >div {
    display: flex;
    flex-direction: column;
  }
}


@media (min-width: 769px) {

  #mobile-menu,
  #mobile-menu-button {
    display: none;
    visibility: hidden;
  }

  nav {
    position: fixed;
    top: 0;
    z-index: 10;
    background-color: var(--bg-secondary);
    box-shadow: var(--bottom-shadow);

    #navbar {
      padding: 1rem 2rem 0 0;
    }
  }

  #hero {
    margin-top: 4rem;
  }

  .nav-links {
    display: flex !important;
  }

  section,
  nav {
    padding: 0 1rem;
  }


  .diapo {
    gap: 0.8em;

    >div {
      padding: 2rem;
    }

    .action {
      margin-bottom: 0;
    }
  }

}