/* ===== Base Mobile-First Styles ===== */
body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}

#wrapper {
  padding: 1em;
}

header, footer, main, nav {
  padding: 1em;
}

header h1 {
  font-size: 1.5em;
  text-align: center;
}

nav ul {
  list-style-type: none;
  padding: 0;
  margin: 0;
  text-align: center;
}

nav li {
  border-bottom: 1px solid #000080;
  padding: 0.5em 0;
}

main section {
  margin-bottom: 1em;
}

#special {
  background: #eef;
  padding: 1em;
  border: 1px solid #ccc;
}

/* ===== Medium Screen (≥600px) ===== */
@media (min-width: 600px) {
  nav ul {
    display: flex;
    justify-content: space-around;
  }

  nav li {
    border-bottom: none;
  }

  .content main {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1em;
  }

  .content h2 {
    grid-column: 1 / -1;
  }

  .content #special {
    grid-column: 1 / -1;
  }

  footer {
    text-align: center;
  }
}

/* ===== Large Screen (≥1024px) ===== */
@media (min-width: 1024px) {
  #wrapper {
    display: grid;
    grid-template-columns: 200px 1fr;
    grid-template-rows: auto auto 1fr auto;
    gap: 1em;
    max-width: 1200px;
    margin: auto;
    border: 1px solid #000080;
    box-shadow: 0 0 10px #0003;
  }

  header {
    grid-column: 1 / -1;
    text-align: center;
  }

  nav {
    grid-row: 2 / 4;
  }

  #hero {
    grid-column: 2 / 3;
    grid-row: 2 / 3;
  }

  main {
    grid-column: 2 / 3;
    grid-row: 3 / 4;
  }

  footer {
    grid-column: 1 / -1;
  }

  nav ul {
    flex-direction: column;
    align-items: flex-start;
    padding-left: 1em;
  }
}