/* -------------------------------
 * Reset
 * ----------------------------- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* -------------------------------
 * Base Layout
 * ----------------------------- */
body {
  font-family: 'Courier New', monospace;
  background: white;
  color: black;
  padding: 0 2rem;
  line-height: 1.6;
}

/* -------------------------------
 * Header
 * ----------------------------- */
header {
  min-height: 100vh; /* whole screen */
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}

header h1 {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
}

/* -------------------------------
 * Navigation
 * ----------------------------- */
nav {
  font-size: 0.9rem;
  font-weight: bold;
}

nav a {
  color: black;
  text-decoration: none;
  margin: 0 0.5rem;
}

/* -------------------------------
 * Intro Banner
 * ----------------------------- */
.banner {
  display: flex;
  align-items: baseline;
  justify-content: center;
  font-family: 'Courier New', monospace;
  font-size: 2.5rem;
  font-weight: bold;
  margin-bottom: 1.5rem;
  width: 100%;
}

.logo {
  height: 1em;
  width: auto;
  margin-bottom: -0.1em; /* due to ff*/
}

.text {
}

/* -------------------------------
 * Main Content
 * ----------------------------- */
main {
  max-width: 600px;
  margin: 0 auto;
  padding-top: 2rem;
}

section {
  margin-bottom: 4rem;
}

section hr {
  margin-bottom: 1rem;
}

section h2 {
  font-size: 1.2rem;
  font-weight: bold;
  margin-bottom: 1rem;
}

p {
  margin-bottom: 1.5rem;
}

ul {
  padding-left: 1.5rem;
  margin-top: 0.5rem;
  margin-bottom: 1.5rem;
}

li {
  margin-bottom: 0.5rem;
}

/* -------------------------------
 * Dark Mode
 * ----------------------------- */
@media (prefers-color-scheme: dark) {
  body {
    background: #121212;
    color: #f0f0f0;
  }

  nav a {
    color: #f0f0f0;
  }

  section hr {
    border-color: #444;
  }

  a {
    color: #9cf;
  }
}

/* -------------------------------
 * Mobile: up to 599px
 * ----------------------------- */
@media (max-width: 599px) {
  body {
    padding: 0 1rem;
    font-size: 0.9rem;
  }

  header h1 {
    font-size: 1.8rem;
  }

  nav {
    font-size: 0.75rem;
  }

  section h2 {
    font-size: 1rem;
  }
}

/* -------------------------------
 * Tablet: 600px to 1023px
 * ----------------------------- */
@media (min-width: 600px) and (max-width: 1023px) {
  body {
    padding: 0 2rem;
    font-size: 1rem;
  }

  header h1 {
    font-size: 2.2rem;
  }

  nav {
    font-size: 0.85rem;
  }

  section h2 {
    font-size: 1.1rem;
  }
}

/* -------------------------------
 * Desktop: from 1024px
 * ----------------------------- */
@media (min-width: 1024px) {
  body {
    padding: 0 3rem;
    font-size: 1rem;
  }

  header h1 {
    font-size: 2.5rem;
  }

  nav {
    font-size: 0.9rem;
  }

  section h2 {
    font-size: 1.2rem;
  }
}