*, *::before, *::after {
  box-sizing: border-box;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  font-size: 14px;
  line-height: 1.55;
  color: #222;
  background: #fff;
  max-width: 680px;
  margin: 0 auto;
  padding: 0;
}

a {
  color: #00c;
  text-decoration: underline;
}

a:visited {
  color: #00c;
}

a:hover {
  color: #c00;
}

/* ── Header ──────────────────────────────────────────────────────── */
header {
  background: #ccc;
  padding: 0.5em 1em 0 1em;
  margin-bottom: 1.2em;
}

header h1 {
  font-size: 1.5em;
  font-weight: bold;
  color: #fff;
  margin: 0 0 0.2em 0;
  padding-bottom: 0.2em;
  border-bottom: 2px solid #888;
}

header h1 a {
  color: #fff;
  text-decoration: none;
}

header p {
  font-size: 0.85em;
  color: #444;
  margin: 0;
  padding: 0.2em 0 0.4em 0;
}

header p a {
  color: #00c;
  text-decoration: none;
}

header p a:hover {
  text-decoration: underline;
}

header hr {
  border: none;
  border-top: 1px solid #aaa;
  margin: 0;
}

header blockquote {
  margin: 0 0.5em 0.5em 0;
}

/* ── Main / article ──────────────────────────────────────────────── */
main {
  padding: 0;
}

article {
  background: #f4f4f4;
  padding: 0.8em 1em;
}

article h1, article h2, article h3, article h4 {
  color: #000;
  margin: 1.2em 0 0.3em 0;
}

article h1 { font-size: 1.3em; }
article h2 { font-size: 1.15em; }
article h3 { font-size: 1em; }

article p {
  margin: 0.65em 0;
}

article ul, article ol {
  margin: 0.5em 0 0.5em 1.4em;
  padding: 0;
}

article li {
  margin-bottom: 0.3em;
}

article code {
  font-family: "Courier New", Courier, monospace;
  font-size: 0.92em;
}

article pre {
  font-family: "Courier New", Courier, monospace;
  font-size: 0.88em;
  background: #e8e8e8;
  padding: 0.6em 1em;
  overflow-x: auto;
  line-height: 1.5;
  white-space: pre;
  margin: 0.7em 0;
}

article pre code {
  background: none;
  padding: 0;
  font-size: inherit;
}

article blockquote {
  border-left: 3px solid #aaa;
  margin: 0.8em 0 0.8em 1em;
  padding: 0.1em 0.8em;
  color: #555;
}

article hr {
  border: none;
  border-top: 1px solid #ccc;
  margin: 1em 0;
}

article img {
  max-width: 100%;
  height: auto;
}

/* hide empty tags div */
.tags { display: none; }

/* ── Footer ──────────────────────────────────────────────────────── */
footer {
  padding: 0 1em 1.5em 1em;
  margin-top: 2em;
  font-size: 0.8em;
  color: #888;
}

footer hr {
  border: none;
  border-top: 1px solid #aaa;
  margin: 0 0 0.4em 0;
}

footer a {
  color: #888;
}

/* ── Blog index ──────────────────────────────────────────────────── */
#blog h1 {
  font-size: 1.2em;
  border-bottom: 1px solid #ccc;
}

#blog ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

#blog ul li {
  border-bottom: 1px dotted #ccc;
  padding: 0.35em 0;
}

#blog ul li a {
  font-weight: bold;
  text-decoration: none;
}

#blog ul li a:hover {
  text-decoration: underline;
}
/* ── Mobile ──────────────────────────────────────────────────────── */
@media (max-width: 480px) {

  body {
    font-size: 16px;   /* slightly larger for readability on small screens */
    width: 100%;
  }

  header {
    padding: 0.4em 0.75em 0 0.75em;
  }

  header h1 {
    font-size: 1.3em;
  }

  article {
    padding: 0.6em 0.75em;
  }

  /* remove deep indent on code blocks — main overflow risk on mobile */
  article pre {
    margin-left: 0;
    font-size: 0.82em;
  }

  footer {
    padding: 0 0.75em 1.2em 0.75em;
  }

  /* larger tap targets for nav links */
  header p a,
  header nav a,
  #blog ul li a {
    display: inline-block;
    padding: 0.3em 0;
    min-height: 44px;
    line-height: 44px;
  }
}