@supports not (display: grid) {
  html {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.5;
  }

  body {
    margin: 0;
    padding: 0;
    background: #ffffff;
    color: #111;
  }

  * {
    box-sizing: border-box;
  }
}
@supports not (display: grid) {
  header,
  nav,
  main,
  footer,
  section,
  article {
    display: block;
    width: 100%;
  }

  main {
    padding: 1rem;
  }
}
@supports not (display: grid) {
  h1 { font-size: 1.8rem; margin: 1rem 0; }
  h2 { font-size: 1.5rem; margin: 1rem 0; }
  h3 { font-size: 1.25rem; margin: 0.75rem 0; }

  p {
    margin: 0.75rem 0;
  }

  ul, ol {
    padding-left: 1.25rem;
  }
}
@supports not (display: grid) {
  button,
  input[type="submit"],
  input[type="button"],
  a[role="button"] {
    display: inline-block;
    padding: 0.5rem 0.75rem;
    border: 1px solid #444;
    background: #f3f3f3;
    color: #000;
    text-decoration: none;
    border-radius: 4px;
  }

  button:disabled,
  input:disabled {
    opacity: 0.5;
  }
}
@supports not (display: grid) {
  input,
  select,
  textarea {
    width: 100%;
    padding: 0.4rem;
    margin-bottom: 0.75rem;
    border: 1px solid #999;
    border-radius: 3px;
    font-size: 1rem;
  }

  label {
    display: block;
    font-weight: bold;
    margin-bottom: 0.25rem;
  }
}
@supports not (display: grid) {
  table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
  }

  th, td {
    border: 1px solid #ccc;
    padding: 0.4rem;
    text-align: left;
  }

  th {
    background: #eee;
  }
}
@supports not (display: grid) {
  svg {
    width: 1.25rem;
    height: 1.25rem;
    display: inline-block;
    vertical-align: middle;
  }

  svg[fill="currentColor"] {
    fill: #111;
  }
}
@supports not (display: grid) {
  button svg,
  a svg {
    width: 1em;
    height: 1em;
  }
}
@supports not (display: grid) {
  nav svg,
  header svg {
    width: 1.5rem;
    height: 1.5rem;
  }
}@supports not (display: grid) {
  svg {
    flex-shrink: 0;
  }
}
.legacy-only { display: none; }
.legacy-browser .legacy-only {
    display: block;
    padding: 1rem;
    background: #fff3cd;
}