:root {
  --background: #E6E1DF;
  --heading: #325D80;
  --text: #2B3F50;
  --muted: #6B7A86;
  --accent: #B89A8F;
  --rule: rgba(50, 93, 128, 0.2);
  --code-background: rgba(144, 144, 144, 0.18);
}

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

html { font-size: 18px; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  padding: 0 1.25rem;
  background-color: var(--background);
  color: var(--text);
  font-family: 'Inter', sans-serif;
  font-weight: 400;
  line-height: 1.7;
  overflow-wrap: break-word;
}

.site-header, main, .site-footer {
  max-width: 40rem;
  margin: 0 auto;
}

a { color: var(--heading); text-underline-offset: 0.15em; }
a:hover { color: var(--accent); }

/* Encabezado y pie del sitio */

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 2rem 0 1rem;
  border-bottom: 1px solid var(--rule);
}

.site-header a { text-decoration: none; }
.site-header a:hover { text-decoration: underline; }

.site-name {
  font-family: 'Fraunces', serif;
  font-weight: 500;
  font-size: 1.15rem;
}

.site-footer {
  margin-top: 4rem;
  padding: 1.5rem 0 3rem;
  border-top: 1px solid var(--rule);
  font-size: 0.9rem;
}

main { padding-top: 3rem; }

/* Tipografía */

h1, h2, h3, h4 {
  color: var(--heading);
  font-family: 'Fraunces', serif;
  font-weight: 500;
  line-height: 1.2;
  margin: 2.5rem 0 1rem;
}

h1 { font-size: 2.2rem; margin-top: 0; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.2rem; }
h4 { font-size: 1rem; }

p, ul, ol, blockquote, pre, table, figure { margin: 0 0 1.25rem; }

strong { font-weight: 600; }

.post-header { margin-bottom: 2.5rem; }
.post-header h1 { margin-bottom: 0.75rem; }

.subtitle {
  font-family: 'Fraunces', serif;
  font-weight: 300;
  font-style: italic;
  font-size: 1.25rem;
  color: var(--heading);
  margin-bottom: 0.75rem;
}

.subtitle em { font-style: normal; }

time { color: var(--muted); font-size: 0.85rem; }

blockquote {
  margin-left: 0;
  margin-right: 0;
  padding-left: 1.25rem;
  border-left: 3px solid var(--accent);
  font-family: 'Fraunces', serif;
  font-weight: 300;
  font-style: italic;
  font-size: 1.1rem;
}

blockquote > :last-child { margin-bottom: 0; }

hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 2.5rem 0;
}

mark { background-color: rgba(184, 154, 143, 0.35); color: inherit; }

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

figure { margin: 2rem 0; text-align: center; }
figure img { max-height: 24rem; }
figcaption { color: var(--muted); font-size: 0.85rem; }

/* Código */

code {
  font-family: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  font-size: 0.85em;
  background-color: var(--code-background);
  border-radius: 0.25em;
  padding: 0.15em 0.35em;
}

pre {
  background-color: var(--code-background);
  border-radius: 0.4em;
  padding: 1rem;
  overflow-x: auto;
  line-height: 1.5;
}

pre code { background: none; padding: 0; }
:not(pre) > code { white-space: nowrap; }

/* Tablas */

table {
  display: block;
  max-width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th, td {
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--rule);
  text-align: left;
}

th { color: var(--heading); font-weight: 600; }

/* Notas al pie */

.footnotes { font-size: 0.85rem; }
.footnote-ref { text-decoration: none; }

/* Fórmulas */

math[display="block"] { overflow-x: auto; max-width: 100%; }

/* Índice del blog */

.post-list { list-style: none; padding: 0; }
.post-list li { margin-bottom: 2rem; }

.post-list .post-title {
  display: block;
  font-family: 'Fraunces', serif;
  font-weight: 500;
  font-size: 1.35rem;
  line-height: 1.3;
  text-decoration: none;
}

.post-list .post-title:hover { text-decoration: underline; }
.post-list p { margin: 0.25rem 0 0; }

.empty { color: var(--muted); }

/* Series */

.kicker {
  margin-bottom: 0.5rem;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.series-tag {
  margin-left: 0.5rem;
  padding: 0.1em 0.6em;
  border: 1px solid var(--rule);
  border-radius: 1em;
  font-size: 0.75rem;
  text-decoration: none;
}

.series {
  margin-bottom: 2.5rem;
  padding: 1.25rem 1.5rem;
  border-left: 3px solid var(--accent);
  background-color: rgba(255, 255, 255, 0.35);
  font-size: 0.9rem;
}

.series > :last-child { margin-bottom: 0; }

.series-intro { margin-bottom: 2.5rem; }

.series-nav {
  display: flex;
  gap: 1.5rem;
  margin-top: 3rem;
  font-family: 'Fraunces', serif;
  line-height: 1.3;
}

.series-nav a { flex: 1; text-decoration: none; }
.series-nav a:hover { text-decoration: underline; }
.series-nav a[rel="next"] { margin-left: auto; text-align: right; }

.series-nav span {
  display: block;
  color: var(--muted);
  font-family: 'Inter', sans-serif;
  font-size: 0.75rem;
}

@media (max-width: 480px) {
  html { font-size: 16px; }
  h1 { font-size: 1.8rem; }
}