html { scroll-behavior: smooth; }
:root {
  --radius: 10px;
  --bg: #101828;
  --bgt: #10182844;

  --ac: #FF7600;
  --act: #FF760033;
}
body {
  background-color: var(--bg);
  margin: 0;
  font-family: ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
}

header {
  z-index: 1;
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  padding: 5px 3vw;

  position: sticky;
  top: 0;

  background-color: white;
  border-radius: 0 0 var(--radius) var(--radius);
  border-bottom: 1px solid var(--bg);
  box-shadow: 0 0 40px 0 #fff4;

  div {
    display: flex;
    flex-direction: row;
  }
  p {
    margin: auto 10px;
  }
  >a {
    font-size: 1.1em;
    text-decoration: none;
    color: black;
    padding: 10px;
    background-color: var(--act);
    border-radius: var(--radius);
  }

}

.hero {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2em;
  padding: 80px 0;
  text-align: center;
  color: white;

  span {
    background: linear-gradient(-45deg, #2A7B9B, #57C785, #EDDD53, #57C785, #2A7B9B);
    background-size: 400% 400%;

    animation: color-slide 15s linear alternate infinite;

    background-clip: text;
    color: transparent;
    text-shadow: 0 0 40px #fff4;
  }
}


aside {
  position: sticky;
  top: 65px;
  left: 0px;
  height: fit-content;
  margin: 10px;
  padding: 2px;
  background: linear-gradient(-45deg, #2A7B9B, #57C785, #EDDD53, #57C785, #2A7B9B);
  border-radius: var(--radius);

  nav {
    background-color: white;
    border-radius: var(--radius);
    padding: 10px 25px;
    height: fit-content;
    max-width: 1080px;

    a {
      color: inherit;
      text-decoration: none;
    }

    ul {
      padding: 0;
      font-weight: bold;
    }
    ul ul {
      list-style-type: '- ';
      font-weight: normal;
      margin: 10px 15px;
    }
  }

}

main {
  background-color: white;
  border-radius: var(--radius);
  box-shadow: 0 0 40px 0 #fff4;
  display: grid;
  grid-template-columns: 2fr 4fr 1fr; 
  margin: auto;
  justify-items: center;
}

section {
  max-width: 1080px;
  padding: 10px;

  h2 a, h3 a {
    color: inherit;
    text-decoration: none;
    &::after {
      content: ' #';
      opacity: 0;
      transition: opacity 150ms ease;
    }
    &:hover::after {
      opacity: 1;
    }
  }

  h2 {
    border-image: linear-gradient(90deg, #2A7B9B, #57C785, #EDDD53) 20;
    border-bottom: 4px solid transparent;
    color: #101828;
    padding: 5px;
    margin: 0 0 0 15px;
  }

  h3 {
    margin-left: 50px;
    position: relative;

    a {
      text-decoration: underline;
      text-decoration-color: #2A7B9B;
      text-decoration-thickness: 4px;
    }
  }
}

p, ul {
  max-inline-size: 80ch;
  font-size: 1.1rem;
  margin: 1rem 1rem;
}
ul ul {
  margin: 1em 0;
}


.cta {
  a {
    background-color: var(--bg);
    border: none;
    color: white;
    font-size: 1.5em;

    border-radius: 15px;
    padding: 15px 25px;
    text-decoration: none;
    text-align: center;
    display: block;
    margin: 0 auto;

    width: 300px;
  }
}

footer {
  padding: 30px 30px;
  color: #fff8;
  display: flex;
  flex-direction: column;
  align-items: center; 
}

@keyframes color-slide {
  from {
    background-position: 0% 0%;
  }
  to {
    background-position: 100% 100%;
  }
}

@media (width <= 1280px) {
  main {
    grid-template-columns: 1fr ; 
  }
  aside {
    width: 80vw;
    position: initial;
  }
  .hero {
    font-size: 1.5em;
  }
  p, ul {
    margin: 1em 0rem;
  }
}

@media (width <= 640px) {
  header {
    flex-direction: column;
  }
  ul {
    padding-left: 0.8rem; 
  }
  .cta a {
    padding: 5% 0;   
  }
}