/* ================================
   RESET & BASE SETUP
================================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  line-height: 1.5; /* vertical rhythm baseline: 1.5rem */
  background-color: #002b36; /* Solarized Dark base */
  color: #fdf6e3; /* Solarized Light text */
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

body {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1.5rem;
  max-width: 960px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
  min-height: 100vh;
}

/* Content column (centered) */
main {
  grid-column: 2 / span 10;
}

/* ================================
   TYPOGRAPHY
================================== */
h1, h2, h3 {
  font-weight: 600;
  margin-top: 3rem;
  margin-bottom: 1rem;
}

h1 {
  font-size: 2rem;
  border-bottom: 2px solid #586e75;
  padding-bottom: 0.5rem;
}

h2 {
  font-size: 1.5rem;
}

p, ul, ol, pre, blockquote {
  margin-bottom: 1.5rem;
  max-width: 65ch;
}

blockquote {
  font-size: xxx-large;
}

ul {
  list-style: disc;
  padding-left: 1.5rem;
}

code {
  font-family: Menlo, Monaco, 'Courier New', monospace;
  background-color: #073642;
  color: #b58900;
  padding: 0.2em 0.4em;
  border-radius: 3px;
}

pre code {
  display: block;
  overflow-x: auto;
  padding: 1rem;
  border-radius: 4px;
  background-color: #002b36;
}

/* ================================
   LINKS & HR
================================== */
a {
  color: #268bd2;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

hr {
  border: none;
  height: 1px;
  background-color: #586e75;
  margin: 3rem 0;
}

/* ================================
   IMAGES
================================== */
img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 1.5rem 0;
}

/* ================================
   MEDIA QUERIES
================================== */
@media (max-width: 768px) {
  body {
    grid-template-columns: 1fr;
    padding: 2rem 1rem;
  }

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