/* ============================================================
   Left for the Reader — blog styles
   Layered on top of css/style.css; inherits the site's
   "chalk on slate" palette, type scale and rhythm.
   Nothing here overrides the main site's own pages.
   ============================================================ */

:root{
  /* Long-form reading needs a touch more light than the site's
     secondary text, and a measure that stays near 70 characters. */
  --read:      #d6dde6;
  --read-size: clamp(1.05rem, 1rem + 0.28vw, 1.16rem);
  --measure:   38rem;
}

/* Post pages are "in" the blog section but aren't the blog index, so they
   carry aria-current="true" rather than "page". Highlight either. */
.nav-links a[aria-current]{color:var(--ochre)}

/* ---------- masthead ---------- */
.lftr-hero{padding-top:clamp(2.25rem,5vw,4rem);padding-bottom:clamp(2.25rem,5vw,4rem);overflow:hidden}
.lftr-hero-grid{
  display:grid;grid-template-columns:1fr .95fr;
  gap:clamp(2rem,5vw,4rem);align-items:center;
}
@media (max-width:900px){.lftr-hero-grid{grid-template-columns:1fr;gap:2.25rem}}

.lftr-title{
  font-size:var(--step-3);
  font-weight:500;
  letter-spacing:-.02em;
  line-height:1.02;
}
.lftr-title .accent{color:var(--ochre);font-style:italic;font-weight:400}

.lftr-tagline{
  font-family:'Spline Sans Mono',monospace;
  font-size:var(--step--1);
  letter-spacing:.06em;
  color:var(--chalk-dim);
  margin-top:1rem;
}
.lftr-sub{margin-top:1.9rem}

/* ---------- masthead figure ---------- */
.lftr-figure{padding:1.35rem 1.25rem}
.lftr-hero-svg{display:block;width:100%;height:auto}
/* The open box ticks slowly anticlockwise. The offset is a whole number of
   dash periods (4 × 14) so the loop restarts without a visible jump. */
.lftr-hero-svg .lftr-box{animation:lftr-drift 9s linear infinite}
@keyframes lftr-drift{to{stroke-dashoffset:-56}}
@media (prefers-reduced-motion:reduce){
  .lftr-hero-svg .lftr-box{animation:none}
}

/* ---------- /feed.xml, when a person opens it ---------- */
.feed-hero{padding-bottom:clamp(1.75rem,4vw,3rem)}
.feed-note{
  max-width:52ch;
  color:var(--chalk-dim);
  margin-top:1.25rem;
}
.feed-note a{
  color:var(--ochre);
  text-decoration:underline;
  text-underline-offset:3px;
  text-decoration-color:color-mix(in srgb,var(--ochre) 42%,transparent);
}
.feed-note a:hover{text-decoration-color:var(--ochre)}
.feed-url{margin-top:1.25rem}
.feed-url code{
  font-family:'Spline Sans Mono',monospace;
  font-size:.85rem;
  color:var(--chalk);
  background:var(--ink-2);
  border:1px solid var(--line);
  border-radius:8px;
  padding:.6rem .85rem;
  display:inline-block;
  max-width:100%;
  overflow-wrap:break-word;
  user-select:all;   /* one click selects the whole address */
}

/* ---------- the archive ---------- */
.lftr-archive{padding-top:clamp(2.5rem,5vw,4rem)}
.lftr-empty{color:var(--chalk-faint);font-family:'Spline Sans Mono',monospace;font-size:var(--step--1)}

.lftr-list{border-top:1px solid var(--line)}
.lftr-item{border-bottom:1px solid var(--line)}
.lftr-item-link{
  display:grid;grid-template-columns:11rem 1fr;gap:1.5rem;
  padding:1.9rem .25rem;
  align-items:start;
  border-radius:10px;
  transition:background .18s;
}
.lftr-item-link:hover{background:var(--ink-2)}
.lftr-when{
  font-family:'Spline Sans Mono',monospace;
  font-size:.78rem;letter-spacing:.04em;
  color:var(--ochre);
  margin:.45rem 0 0;
  white-space:nowrap;
}
.lftr-item-body h2{
  font-size:var(--step-2);
  font-weight:600;
  line-height:1.15;
  letter-spacing:-.01em;
  margin:0 0 .55rem;
  transition:color .18s;
}
.lftr-item-link:hover .lftr-item-body h2{color:var(--ochre)}
.lftr-excerpt{
  color:var(--chalk-dim);
  max-width:62ch;
  margin:0;
}
.lftr-more{
  font-family:'Spline Sans Mono',monospace;
  font-size:.76rem;letter-spacing:.08em;text-transform:uppercase;
  color:var(--chalk-faint);
  margin:.9rem 0 0;
  transition:color .18s;
}
.lftr-item-link:hover .lftr-more{color:var(--ochre)}
@media (max-width:720px){
  .lftr-item-link{grid-template-columns:1fr;gap:.55rem;padding:1.5rem .25rem}
  .lftr-when{margin:0}
}

/* ============================================================
   A single post
   ============================================================ */
.post-head{padding-top:clamp(2.25rem,5vw,3.5rem)}
.post-head-inner{max-width:var(--measure)}
.post-head h1{
  font-size:var(--step-3);
  font-weight:500;
  letter-spacing:-.02em;
  line-height:1.06;
  margin-top:.2rem;
}
.eyebrow-back{color:var(--ochre)}
.eyebrow-back:hover{text-decoration:underline;text-underline-offset:3px}
.post-meta{
  font-family:'Spline Sans Mono',monospace;
  font-size:.78rem;letter-spacing:.05em;
  color:var(--chalk-faint);
  margin:1.15rem 0 0;
  display:flex;flex-wrap:wrap;gap:.55rem;align-items:baseline;
}
.post-meta .dot{opacity:.5}
.post-rule{
  height:1px;margin-top:2.1rem;
  background:linear-gradient(90deg,var(--ochre),var(--line) 22%,var(--line));
  max-width:var(--measure);
}

/* ---------- the reading column ---------- */
.post-body{
  max-width:var(--measure);
  font-size:var(--read-size);
  line-height:1.72;
  color:var(--read);
  padding-bottom:1rem;
  /* keep long formulas and code from widening the page on phones */
  overflow-wrap:break-word;
}
.post-body > p{margin:0 0 1.35em}

/* opening paragraph reads a little larger */
.post-body > p:first-of-type{
  font-size:1.06em;
  color:var(--chalk);
}

/* run-in emphasis: "**Point being made.** Then the argument…" */
.post-body strong{color:var(--chalk);font-weight:600}
.post-body em{color:inherit}

.post-body h2,.post-body h3,.post-body h4{
  color:var(--chalk);
  margin:2.4em 0 .6em;
  line-height:1.2;
}
.post-body h2{font-size:1.5em;letter-spacing:-.01em}
.post-body h3{font-size:1.18em}
.post-body h4{font-size:1.02em;font-family:'Spline Sans Mono',monospace;letter-spacing:.06em;text-transform:uppercase;color:var(--ochre);font-weight:500}

.post-body a{
  color:var(--ochre);
  text-decoration:underline;
  text-underline-offset:3px;
  text-decoration-thickness:1px;
  text-decoration-color:color-mix(in srgb,var(--ochre) 42%,transparent);
  transition:text-decoration-color .15s;
}
.post-body a:hover{text-decoration-color:var(--ochre)}

.post-body ul,.post-body ol{padding-left:1.3em;margin:0 0 1.35em}
.post-body li{margin-bottom:.5em}
.post-body li::marker{color:var(--ochre)}

.post-body blockquote{
  margin:1.8em 0;padding:.15em 0 .15em 1.4em;
  border-left:2px solid var(--ochre);
  color:var(--chalk-dim);
  font-style:italic;
}
.post-body blockquote p:last-child{margin-bottom:0}

.post-body hr{
  border:none;border-top:1px solid var(--line);
  margin:2.6em 0;
}

.post-body code{
  font-family:'Spline Sans Mono',monospace;
  font-size:.88em;
  background:var(--ink-2);
  border:1px solid var(--line);
  border-radius:4px;
  padding:.1em .35em;
  color:var(--chalk);
}
.post-body pre{
  background:var(--ink-2);
  border:1px solid var(--line);
  border-radius:10px;
  padding:1rem 1.1rem;
  overflow-x:auto;
  font-size:.86em;
  line-height:1.6;
  margin:0 0 1.6em;
}
.post-body pre code{background:none;border:none;padding:0;font-size:1em}

.post-body img{max-width:100%;height:auto;display:block;border-radius:10px;border:1px solid var(--line)}
.post-body figure{margin:2em 0}
.post-body figcaption{
  font-family:'Spline Sans Mono',monospace;font-size:.74rem;
  color:var(--chalk-faint);margin-top:.6rem;letter-spacing:.03em;
}

/* tables can be wider than the measure — let them scroll, not the page */
.post-body .table-scroll{overflow-x:auto;margin:0 0 1.6em}
.post-body table{border-collapse:collapse;width:100%;font-size:.92em}
.post-body th,.post-body td{
  text-align:left;padding:.6em .8em;border-bottom:1px solid var(--line);
}
.post-body th{
  font-family:'Spline Sans Mono',monospace;font-size:.76rem;
  letter-spacing:.06em;text-transform:uppercase;color:var(--chalk-faint);font-weight:500;
}

/* display math shouldn't force a horizontal page scroll on phones */
.post-body mjx-container[display="true"]{overflow-x:auto;overflow-y:hidden;padding:.3em 0}

/* end mark */
.halmos{
  color:var(--ochre);
  font-size:1.1rem;
  line-height:1;
  margin:2.2rem 0 0;
  opacity:.85;
}

/* ---------- prev / next ---------- */
.post-nav{
  display:grid;grid-template-columns:1fr 1fr;gap:1px;
  background:var(--line);border:1px solid var(--line);border-radius:12px;
  overflow:hidden;margin-top:clamp(2.5rem,5vw,4rem);
  max-width:var(--measure);
}
.post-nav-item{
  background:var(--ink);padding:1.15rem 1.25rem;
  display:flex;flex-direction:column;gap:.35rem;
  transition:background .18s;min-height:5.5rem;
}
a.post-nav-item:hover{background:var(--ink-2)}
.post-nav-item .k{
  font-family:'Spline Sans Mono',monospace;font-size:.72rem;
  letter-spacing:.08em;text-transform:uppercase;color:var(--ochre);
}
.post-nav-item .t{font-family:'Fraunces',serif;font-size:1rem;line-height:1.25;color:var(--chalk)}
.post-nav-item.next{text-align:right;align-items:flex-end}
.post-nav-item.empty{pointer-events:none}
@media (max-width:600px){
  .post-nav{grid-template-columns:1fr}
  .post-nav-item.next{text-align:left;align-items:flex-start}
  .post-nav-item.empty{display:none}
}

.post-back{
  margin:1.6rem 0 clamp(2.5rem,6vw,4.5rem);
  font-family:'Spline Sans Mono',monospace;font-size:var(--step--1);
}
.post-back a{color:var(--chalk-dim)}
.post-back a:hover{color:var(--ochre)}