/* Plain text site. No framework, no build step beyond Jekyll copying this file. */

:root {
  --fg:      #1a1a1a;
  --bg:      #fffffb;
  --muted:   #6a6a6a;
  --link:    #0b4ea2;
  --rule:    #ddd;
  --codebg:  #f4f4f0;
}

/* The site defaults to light regardless of the OS setting; dark is opt-in
   through the toggle, which sets data-theme="dark". */
:root[data-theme="dark"] {
  --fg:     #ddd9d3;
  --bg:     #16161a;
  --muted:  #8f8f8f;
  --link:   #7fb0ea;
  --rule:   #33333a;
  --codebg: #202027;
}

* { box-sizing: border-box; }

body {
  font-family: Verdana, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  color: var(--fg);
  background: var(--bg);
  max-width: 42rem;
  margin: 0 auto;
  padding: 2rem 1rem 2rem;
  -webkit-text-size-adjust: 100%;
}

a { color: var(--link); }
a:hover { text-decoration: none; }

/* --- header --- */

header {
  border-bottom: 1px solid var(--rule);
  padding-bottom: 0.75rem;
  margin-bottom: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  align-items: baseline;
  justify-content: space-between;
}

.sitename {
  font-size: 1.35rem;
  font-weight: bold;
  color: var(--fg);
  text-decoration: none;
}

nav {
  display: flex;
  align-items: baseline;
  gap: 1rem;
}

nav a {
  font-size: 0.95rem;
}

.theme-toggle {
  background: none;
  border: 0;
  padding: 0;
  color: var(--fg);
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
}
.theme-toggle:hover { color: var(--link); }

/* --- text --- */

h1 { font-size: 2rem; font-weight: 500; letter-spacing: -0.02em; line-height: 1.25; margin: 0 0 0.4rem; }
h2 { font-size: 1.25rem; margin: 2rem 0 0.6rem; }
h3 { font-size: 1.05rem; margin: 1.6rem 0 0.4rem; }

p, ul, ol, blockquote, pre, table { margin: 0 0 1.1rem; }

.intro { margin-bottom: 2rem; }

.meta, .backlink {
  color: var(--muted);
  font-size: 0.9rem;
}

.backlink {
  margin-top: 2.5rem;
  border-top: 1px solid var(--rule);
  padding-top: 1rem;
}

blockquote {
  border-left: 2px solid var(--rule);
  margin-left: 0;
  padding-left: 1rem;
  color: var(--muted);
}

hr { border: 0; border-top: 1px solid var(--rule); margin: 2rem 0; }

/* --- post list --- */

.postlist { list-style: none; padding: 0; }

.postlist li {
  display: flex;
  gap: 1rem;
  align-items: baseline;
  margin-bottom: 0.4rem;
}

.postlist time {
  color: var(--muted);
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  min-width: 6rem;
}

/* --- code --- */

code, pre, kbd, samp {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, "DejaVu Sans Mono", monospace;
  font-size: 0.85em;
}

code {
  background: var(--codebg);
  padding: 0.1em 0.3em;
  border-radius: 3px;
}

pre {
  background: var(--codebg);
  padding: 0.85rem 1rem;
  border-radius: 4px;
  overflow-x: auto;
  line-height: 1.45;
}

pre code { background: none; padding: 0; }

/* --- tables and images --- */

table { border-collapse: collapse; width: 100%; font-size: 0.92rem; display: block; overflow-x: auto; }
th, td { border: 1px solid var(--rule); padding: 0.4rem 0.6rem; text-align: left; }
th { font-weight: bold; }

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

/* --- footer --- */

footer {
  margin-top: 3.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 480px) {
  body { font-size: 17px; padding-top: 1.75rem; }
  .postlist li { flex-direction: column; gap: 0; margin-bottom: 0.8rem; }
}