/* all reset/normalization you need */
*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --z-index-0: 0;
  --z-index-1: 10;
  --z-index-2: 20;
  --z-index-3: 30;
  --z-index-4: 40;
  --z-index-5: 50;
  --z-index-max: 9999;
}

/* page layout */
body {
  margin: 0;

  > header nav {
    padding: 0 1rem;
    justify-content: space-between;
    display: flex;
    flex-wrap: wrap;

    a {
      padding: 1em 0;
    }
  }

  /* Style for subheader */
  section.subheader {
    padding: 0 1rem;
    position: sticky;
    top: 0;
    z-index: var(--z-index-5);
    background-color: inherit;
    background-color: var(--md-sys-color-surface-container-highest);
    color: var(--md-sys-color-on-surface);
  }

  > main {
    margin-top: 4rem;
    padding: 0 1rem;

    /* content area: hero and sections */
    article {
      max-width: 40rem;
      width: 100%;
      margin: 0 auto;

      > header {
        margin-bottom: 2rem;
      }

      > footer {
        margin-top: 4rem;
      }
    }
  }

  /* global footer */
  > footer {
    border-top: 1px solid var(--md-sys-color-outline-variant);
    justify-content: space-between;
    margin-top: 6rem;
    padding: 1rem 2rem;
    display: flex;

    /* social icons */
    > :last-child {
      display: flex;
      gap: 0.5em;
      a:hover {
        transform: scale(1.1);
      }
    }
  }

  h1,
  h2,
  h3 {
    scroll-margin-top: 1rem;
  }
}

[popover] {
  z-index: var(--z-index-max);

  &::backdrop {
    z-index: calc(var(--z-index-max) - 1);
    background-color: rgba(0, 0, 0, 0.333);
    backdrop-filter: blur(4px);
  }
}

@media (min-width: 576px) {
  body {
    > main {
      article {
        > p,
        > ul li {
          font-size: 17.2px;
        }
      }
    }
  }
}