/* ========================================================================== 
   Scriptum Mistiviae
   Quiet system typography. Hierarchy is carried by size, weight, and space;
   no downloaded text fonts or accent colors are needed.
   ========================================================================== */

:root {
  --face-text: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Noto Sans CJK SC", "Noto Sans", sans-serif;
  --face-heading-text: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Noto Sans CJK SC", "Noto Sans", sans-serif;
  --face-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;

  --ink: #17191d;
  --ink-soft: #4d525a;
  --ink-faint: #8c9199;
  --paper: #fcfcfd;
  --rule: #e2e4e8;
  --wash: #f2f3f5;
}

html {
  height: 100%;
}

body {
  font-family: var(--face-text);
  font-size: 1.0625rem;
  font-weight: 400;
  line-height: 1.76;
  letter-spacing: 0.005em;
  color: var(--ink);
  background-color: var(--paper);
  max-width: 39rem;
  margin: 0 auto;
  padding: 2.2rem 1.5rem 3rem;
  min-height: 100%;
  overflow-wrap: break-word;
  text-autospace: normal;
}

/* --- Masthead ----------------------------------------------------------- */

/* On an index the title stands alone, so it needs its own room below; an
   article overrides this, because the date line follows it closely. */
body > h1:first-of-type {
  text-align: center;
  letter-spacing: 0.025em;
  font-size: 1.8em;
  font-weight: 650;
  text-indent: 0.14em; /* offset the trailing letter-space, keeps it optically centered */
  margin: 0 0 2.6rem;
}

/* The nav runs across the top, above the title block. */
p:has(> .masthead-nav) {
  text-align: center;
  margin: 0 0 2.4rem;
}

p:has(> .note),
p:has(> .pubdate) {
  text-align: center;
  margin: 0 0 2.2rem;
}

.masthead-nav,
.note,
.pubdate {
  color: var(--ink-faint);
  font-size: 0.8em;
  letter-spacing: 0.06em;
}

/* --- Article -------------------------------------------------------------
   A post carries a date line; the title is then a document title rather than
   the site's wordmark, so it drops the wide wordmark letterspacing. */

body:has(.pubdate) > h1:first-of-type {
  font-size: 1.8em;
  font-weight: 650;
  text-indent: 0;
  line-height: 1.4;
  margin-bottom: 0.7rem;
}

body:has(.pubdate) {
  padding-bottom: 2rem;
}

body:has(.pubdate) p {
  text-align: justify;
}

body:has(.pubdate) p:has(> .masthead-nav),
body:has(.pubdate) p:has(> .pubdate) {
  text-align: center;
}

.masthead-nav a {
  color: var(--ink-soft);
  padding: 0 0.15em;
}

/* --- Contents ------------------------------------------------------------
   Date sits in a fixed marginal column, title in its own column. A title that
   wraps to several lines stays aligned as one block against that margin,
   rather than trailing back under the date. */

ul:has(> li > .pdate) {
  list-style: none;
  margin: 0;
  padding: 0;
}

ul:has(> li > .pdate) li {
  display: grid;
  grid-template-columns: 5.6em 1fr;
  align-items: baseline;
  margin: 0;
  padding: 0.38em 0;
}

.pdate {
  color: var(--ink-faint);
  font-size: 0.76em;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

@media (max-width: 30rem) {
  ul:has(> li > .pdate) li {
    grid-template-columns: 1fr;
    padding: 0.5em 0;
  }
}

/* --- Homepage: short intro and a handful of destinations ---------------- */

#zhnav,
#ennav {
  text-align: center;
}

#zhnav ul,
#ennav ul {
  list-style: none;
  margin: 1.8rem 0 0;
  padding: 0;
}

#zhnav li,
#ennav li {
  margin: 0;
  padding: 0.42em 0;
}

/* --- Back-of-book index (friend links) ---------------------------------- */

#lnks {
  list-style: none;
  margin: 0;
  padding: 0;
  columns: 2;
  column-gap: 2.25rem;
}

#lnks li {
  margin: 0;
  padding: 0.24em 0;
  break-inside: avoid;
  font-size: 0.94em;
}

@media (max-width: 34rem) {
  #lnks {
    columns: 1;
  }
}

/* --- Body text ---------------------------------------------------------- */

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--face-heading-text);
  font-weight: 600;
  line-height: 1.35;
  text-wrap: balance;
}

/* Size, weight and space keep the hierarchy clear without changing faces. */
h2 {
  margin-top: 3.4rem;
  margin-bottom: 0.85rem;
  font-size: 1.45em;
  letter-spacing: 0.015em;
  color: var(--ink);
}

h3 {
  margin-top: 2.3rem;
  margin-bottom: 0.5rem;
  font-size: 1.05em;
  letter-spacing: 0.03em;
  color: var(--ink);
}

h4,
h5,
h6 {
  margin-top: 2rem;
  margin-bottom: 0.5rem;
  font-size: 1em;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}

p {
  margin: 1.15rem 0;
}

li {
  margin: 0.4rem 0;
}

a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
}

a:visited {
  color: var(--ink);
}

a:hover {
  border-bottom-color: var(--ink);
}

a:focus-visible {
  outline: 2px solid var(--ink-soft);
  outline-offset: 3px;
}

.masthead-nav a,
#lnks a {
  border-bottom: none;
}

.masthead-nav a:hover,
#lnks a:hover {
  color: var(--ink);
  border-bottom: 1px solid var(--ink);
}

*:target {
  background: var(--wash);
}

/* Quotations sit indented from the measure, the way block quotes are set in a
   book — the rule marks the margin rather than boxing the text. */
blockquote {
  font-style: normal;
  margin: 1.6rem 0;
  border-left: 2px solid var(--rule);
  padding: 0.1rem 0 0.1rem 1.3em;
  color: var(--ink-soft);
  font-size: 0.96em;
}

blockquote > p:first-child {
  margin-top: 0;
}

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

/* --- Colophon rule: short and centered, not a full-width divider -------- */

hr {
  border: none;
  height: 1px;
  width: 2.5rem;
  background: var(--rule);
  margin: 3.5rem auto 1.5rem;
}

#email {
  text-align: center;
  color: var(--ink-faint);
  font-size: 0.8em;
  letter-spacing: 0.05em;
  margin: 0;
}

/* --- Code, tables, figures ---------------------------------------------- */

pre {
  background-color: var(--wash);
  border-radius: 2px;
  color: var(--ink);
  padding: 0.9em 1.05em;
  margin: 1.5rem 0;
  font-family: var(--face-mono);
  font-size: 0.8em;
  line-height: 1.62;
  overflow-x: auto;
  /* Code is never justified, whatever the surrounding prose does. */
  text-align: left;
  tab-size: 4;
}

pre > code {
  background: none;
  padding: 0;
  font-size: inherit;
  white-space: pre;
}

code {
  font-family: var(--face-mono);
}

code:not(pre > code) {
  background-color: var(--wash);
  color: var(--ink);
  border-radius: 2px;
  padding: 0.12em 0.34em;
  font-size: 0.85em;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.94em;
  margin: 1.5rem 0;
}

th,
td {
  border: none;
  border-bottom: 1px solid var(--rule);
  padding: 0.5rem 0.7rem;
  text-align: left;
}

thead th {
  border-bottom: 1.5px solid var(--ink-faint);
  font-weight: 600;
}

img {
  max-width: 100%;
  display: block;
  margin: 1.5rem auto;
}

/* A photograph set to the full measure crowds the text; hold it in from the
   margins, at every width. */
body:has(.pubdate) img {
  max-width: 75%;
}

figcaption {
  text-align: center;
  color: var(--ink-faint);
  font-size: 0.85em;
}

.tag {
  white-space: nowrap;
}

/* Legacy hooks retained for pages that still use them. */
.back {
  background-color: transparent;
  padding: 0;
  font-family: var(--face-text);
  color: var(--ink-faint);
  font-size: 0.9em;
}

.back a {
  color: var(--ink-faint);
  border-bottom: none;
}

.w {
  max-width: 900px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

.toc {
  border: 1px solid var(--rule);
  padding: 1rem;
}

code.has-jax {
  -webkit-font-smoothing: antialiased;
  background: inherit !important;
  border: none !important;
  font-size: 100%;
}

#nl-badge-frame {
  visibility: hidden;
}