:root {
  --paper: #e7dfcc;
  --paper-2: #ddd4bd;
  --ink: #1b1610;
  --muted: #5a5246;
  --blood: #9b2114;
  --rule: #1b1610;
  --ok: #2a4a32;
}
* { box-sizing: border-box; }
html { font-size: 18px; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Newsreader", "Iowan Old Style", Palatino, serif;
  font-optical-sizing: auto;
  line-height: 1.5;
  text-rendering: optimizeLegibility;
}
.frame { max-width: 42rem; margin: 0 auto; padding: 1.4rem 1.15rem 3.2rem; }
.mast {
  display: flex; justify-content: space-between; gap: 1rem;
  border-top: 3px solid var(--rule); border-bottom: 1px solid var(--rule);
  padding: .32rem 0 .38rem;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: .66rem; letter-spacing: .07em; text-transform: uppercase;
}
.mast a { color: inherit; text-decoration: none; }
.mast a:hover { color: var(--blood); }
h1 {
  font-family: "Ibarra Real Nova", "Times New Roman", serif;
  font-weight: 700; font-size: clamp(1.85rem, 6vw, 2.6rem);
  line-height: .98; letter-spacing: -.025em; margin: 1.15rem 0 .55rem;
}
.answer {
  font-family: "Ibarra Real Nova", serif;
  font-size: 1.18rem; line-height: 1.28; margin: 0 0 1.15rem;
}
.answer b { font-weight: 700; }
.byline {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: .68rem; color: var(--muted);
  border-top: 1px solid var(--rule); padding-top: .55rem; margin-bottom: 1.4rem;
}
h2 {
  font-family: "Ibarra Real Nova", serif;
  font-size: 1.28rem; font-weight: 700; letter-spacing: -.02em;
  margin: 1.7rem 0 .5rem;
}
h3 {
  font-family: "Ibarra Real Nova", serif;
  font-size: 1.05rem; font-weight: 700; letter-spacing: -.015em;
  margin: 1.25rem 0 .35rem;
}
p { margin: 0 0 .75rem; }
a { color: var(--blood); text-underline-offset: .14em; }
ul, ol { margin: 0 0 .9rem; padding-left: 1.15rem; }
li { margin: 0 0 .28rem; }
.cifras {
  display: grid; grid-template-columns: 1fr 1fr 1fr;
  gap: 0; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule);
  margin: 1.1rem 0 1.2rem;
}
.cifras div { padding: .7rem .55rem .75rem; }
.cifras div + div { border-left: 1px solid rgba(27,22,16,.2); }
.cifras .n {
  font-family: "Ibarra Real Nova", serif;
  font-size: 1.55rem; font-weight: 700; letter-spacing: -.03em; line-height: 1.05;
  display: block; margin-bottom: .25rem;
  white-space: nowrap;
}
.cifras span {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: .62rem; letter-spacing: .03em; color: var(--muted);
  display: block; line-height: 1.3;
}
table { width: 100%; border-collapse: collapse; font-size: .92rem; margin: .3rem 0 1rem; }
.drill details { border: 0; margin: .35rem 0 0; padding: 0; }
.drill p:last-child { margin-bottom: .4rem; }
th, td { text-align: left; padding: .38rem .35rem .38rem 0; border-bottom: 1px solid rgba(27,22,16,.16); vertical-align: baseline; }
th {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-weight: 400; font-size: .68rem; color: var(--muted);
}
td b { font-weight: 600; }
.tag {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: .6rem; letter-spacing: .05em; text-transform: uppercase;
  color: var(--muted);
}
.tag.exam { color: var(--blood); }
.aviso {
  border-left: 3px solid var(--blood);
  padding: .15rem 0 .15rem .85rem; margin: .9rem 0 1rem;
  font-family: "Ibarra Real Nova", serif; font-size: 1.02rem;
}
.aviso.ok { border-left-color: var(--ok); }
.why {
  background: var(--paper-2);
  padding: .75rem .85rem .55rem;
  margin: 0 0 1.05rem;
}
.why p:last-child { margin-bottom: .2rem; }
.q {
  background: var(--paper-2);
  padding: .8rem .9rem .5rem;
  margin: 0 0 1rem;
}
.q .src {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: .62rem; letter-spacing: .04em; text-transform: uppercase;
  color: var(--muted); margin: 0 0 .45rem;
}
.q p:last-child, .q ul:last-child, .q ol:last-child { margin-bottom: .25rem; }
.q img { max-width: 100%; height: auto; display: block; margin: .4rem 0 .55rem; }
.q ul, .q ol { margin-bottom: .45rem; }
.fig { margin: .55rem 0 .35rem; }
.fig svg { width: 100%; height: auto; display: block; }
.cap {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: .62rem; letter-spacing: .03em; color: var(--muted);
  margin: 0 0 1.05rem; line-height: 1.35;
}
.toc { list-style: none; padding: 0; margin: 0 0 1.2rem; }
.toc li {
  display: flex; justify-content: space-between; gap: .8rem;
  padding: .42rem 0; border-bottom: 1px solid rgba(27,22,16,.16);
  margin: 0;
}
.toc a { color: inherit; text-decoration: none; font-weight: 600; }
.toc a:hover { color: var(--blood); }
.toc .tag { flex-shrink: 0; padding-top: .15rem; }
.katex-display { margin: .7rem 0 1rem !important; overflow-x: auto; overflow-y: hidden; }
.katex { font-size: 1.05em; }
pre, .code {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: .78rem; line-height: 1.45;
  background: var(--paper-2);
  padding: .7rem .75rem;
  margin: 0 0 1rem;
  overflow-x: auto;
}
details {
  border-top: 1px solid rgba(27,22,16,.2);
  border-bottom: 1px solid rgba(27,22,16,.2);
  padding: .45rem 0;
  margin: 0 0 1rem;
}
details + details { border-top: 0; margin-top: -.15rem; }
summary {
  cursor: pointer;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: .72rem; letter-spacing: .04em; text-transform: uppercase;
  color: var(--blood);
  list-style: none;
}
summary::-webkit-details-marker { display: none; }
details[open] summary { margin-bottom: .45rem; }
.drill {
  background: var(--paper-2);
  padding: .85rem .9rem .5rem;
  margin: 0 0 1rem;
}
.drill h3 { margin-top: 0; }
.foot {
  margin-top: 2.2rem; border-top: 1px solid var(--rule); padding-top: .6rem;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: .64rem; color: var(--muted); line-height: 1.6;
}
.pager {
  display: flex; justify-content: space-between; gap: 1rem;
  margin-top: 1.8rem; padding-top: .6rem; border-top: 1px solid var(--rule);
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: .68rem; letter-spacing: .04em; text-transform: uppercase;
}
.pager a { color: inherit; text-decoration: none; }
.pager a:hover { color: var(--blood); }
.pager .next { margin-left: auto; text-align: right; }
@media (max-width: 560px) {
  .cifras { grid-template-columns: 1fr; }
  .cifras div + div { border-left: 0; border-top: 1px solid rgba(27,22,16,.2); }
}