/* Layout: a single reading column (~65ch) with a slim masthead; home = post index, post = article, about = profile. */
:root {
  --paper: #F2F4F1;
  --surface: #FFFFFF;
  --ink: #1B2330;
  --muted: #5B6573;
  --rule: #D6DCD6;
  --accent: #2F4ACF;
  --accent-soft: #E3E8FB;
  --f-display: "Young Serif", Georgia, "Times New Roman", serif;
  --f-body: "Source Serif 4", Georgia, "Times New Roman", serif;
  --f-mono: "IBM Plex Mono", ui-monospace, Menlo, Consolas, monospace;
  --measure: 40rem;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #12161D; --surface: #1A2029; --ink: #E6E9EE; --muted: #98A2B0;
    --rule: #2A323E; --accent: #8EA2FF; --accent-soft: #232C4A; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #12161D; --surface: #1A2029; --ink: #E6E9EE; --muted: #98A2B0;
  --rule: #2A323E; --accent: #8EA2FF; --accent-soft: #232C4A; color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
body {
  background: var(--paper); color: var(--ink);
  font-family: var(--f-body); font-size: 1.125rem; line-height: 1.65;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}
.wrap { max-width: var(--measure); margin: 0 auto; }
a { color: var(--accent); text-underline-offset: 3px; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 3px; }
h1, h2, h3 { font-family: var(--f-display); font-weight: 400; line-height: 1.2; text-wrap: balance; margin: 0; }
.label { font-family: var(--f-mono); font-size: .75rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }

/* Masthead */
header.mast { padding-block: 2rem 1.25rem; border-bottom: 1px solid var(--rule); display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: .75rem 1.5rem; }
.brand { font-family: var(--f-display); font-size: 1.5rem; color: var(--ink); text-decoration: none; }
nav { display: flex; gap: 1.25rem; }
nav a { font-family: var(--f-mono); font-size: .85rem; color: var(--muted); text-decoration: none; padding-block: .25rem; border-bottom: 2px solid transparent; }
nav a[aria-current="page"] { color: var(--ink); border-color: var(--accent); }
nav a:hover { color: var(--ink); }

main { padding-block: 2.5rem 4rem; }

/* Home */
.intro { display: grid; gap: .75rem; margin-bottom: 2.5rem; }
.intro h1 { font-size: clamp(2rem, 6vw, 2.75rem); }
.intro p { margin: 0; color: var(--muted); }
.tags { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: 1.5rem; }
.tag { font-family: var(--f-mono); font-size: .78rem; border: 1px solid var(--rule); background: transparent; color: var(--muted); padding: .3rem .7rem; border-radius: 999px; cursor: pointer; }
.tag[aria-pressed="true"] { background: var(--accent-soft); color: var(--accent); border-color: var(--accent); }
.posts { list-style: none; margin: 0; padding: 0; }
.posts li { border-top: 1px solid var(--rule); }
.posts li:last-child { border-bottom: 1px solid var(--rule); }
.post-link { display: grid; grid-template-columns: 6.5rem 1fr; gap: .25rem 1.25rem; padding-block: 1.25rem; text-decoration: none; color: inherit; }
.post-link:hover h2 { color: var(--accent); }
.post-link time { font-family: var(--f-mono); font-size: .8rem; color: var(--muted); padding-top: .35rem; font-variant-numeric: tabular-nums; }
.post-link > div { min-width: 0; display: grid; gap: .35rem; }
.post-link h2 { font-size: 1.4rem; transition: color .15s; }
.post-link p { margin: 0; color: var(--muted); font-size: 1rem; }
.empty { color: var(--muted); padding-block: 1rem; }

/* Article */
.article-head { display: grid; gap: .9rem; margin-bottom: 2rem; }
.article-head h1 { font-size: clamp(2rem, 6vw, 2.8rem); }
.meta { display: flex; flex-wrap: wrap; gap: .4rem 1rem; }
.prose p { margin: 0 0 1.25em; }
.prose h3 { font-size: 1.35rem; margin: 2rem 0 .75rem; }
.prose blockquote { margin: 1.75rem 0; padding-left: 1.25rem; border-left: 3px solid var(--accent); font-style: italic; color: var(--muted); }
.prose ul, .prose ol { padding-left: 1.25rem; margin: 0 0 1.25em; }
.prose ol.steps { padding-left: 2rem; display: grid; gap: .4rem; font-variant-numeric: tabular-nums; }
.prose ol.steps li.gap { list-style: none; color: var(--muted); }
.prose .chain { font-family: var(--f-mono); font-size: .85rem; line-height: 1.8; color: var(--muted); background: var(--surface); border: 1px solid var(--rule); border-radius: 6px; padding: .75rem 1rem; }
.prose ol { display: grid; gap: .6rem; }
.back { font-family: var(--f-mono); font-size: .85rem; text-decoration: none; display: inline-block; margin-bottom: 1.5rem; }
.pager { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; border-top: 1px solid var(--rule); padding-top: 1.25rem; margin-top: 2.5rem; }
.pager a { text-decoration: none; display: grid; gap: .2rem; max-width: 48%; min-width: 0; }
.pager a.next { text-align: right; margin-left: auto; }
.pager strong { font-family: var(--f-display); font-weight: 400; color: var(--ink); }

/* About */
.about-top { display: flex; gap: 1.5rem; align-items: center; flex-wrap: wrap; margin-bottom: 2rem; }
.avatar { width: 6.5rem; height: 6.5rem; border-radius: 50%; background: var(--accent-soft); color: var(--accent); display: grid; place-items: center; font-family: var(--f-display); font-size: 2.4rem; flex-shrink: 0; }
.about-top > div { min-width: 0; display: grid; gap: .4rem; }
.about-top h1 { font-size: clamp(2rem, 6vw, 2.6rem); }
.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr)); gap: 1rem; margin: 2rem 0; padding: 1.25rem; background: var(--surface); border: 1px solid var(--rule); border-radius: 6px; }
.facts div { display: grid; gap: .2rem; }
.facts span:last-child { font-size: 1rem; }
.links { display: flex; flex-wrap: wrap; gap: .5rem 1.25rem; font-family: var(--f-mono); font-size: .9rem; }
.email { display: flex; flex-wrap: wrap; align-items: center; gap: .75rem; margin-top: 1rem; }
.email code { font-family: var(--f-mono); font-size: .95rem; background: var(--surface); border: 1px solid var(--rule); padding: .35rem .6rem; border-radius: 4px; user-select: all; }
.btn { font-family: var(--f-mono); font-size: .8rem; background: var(--accent); color: var(--surface); border: 0; padding: .45rem .9rem; border-radius: 4px; cursor: pointer; }

.sub { font-size: 1.35rem; margin: 2.25rem 0 1rem; }
@media (max-width: 520px) { 
footer { border-top: 1px solid var(--rule); padding-block: 1.5rem 2rem; display: flex; flex-wrap: wrap; justify-content: space-between; gap: .5rem; }

@media (max-width: 520px) {
  .post-link { grid-template-columns: 1fr; }
  .post-link time { padding-top: 0; }
  .pager a { max-width: 100%; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }

html { -webkit-text-size-adjust: 100%; }
body { margin: 0; padding-top: env(safe-area-inset-top, 0px); padding-bottom: env(safe-area-inset-bottom, 0px); }
.more { display: inline-block; margin-top: 1.75rem; font-family: var(--f-mono); font-size: .9rem; text-decoration: none; }
.year { font-family: var(--f-display); font-weight: 400; font-size: 1.25rem; margin: 2rem 0 .25rem; }
.year:first-of-type { margin-top: 0; }

.prose .cta { margin-top: 2rem; }
.prose .cta .btn { display: inline-block; text-decoration: none; font-size: .9rem; padding: .6rem 1.1rem; }
.byline { text-transform: none; letter-spacing: .02em; }

.crosspost { font-family: var(--f-mono); font-size: .85rem; color: var(--muted); background: var(--surface); border: 1px solid var(--rule); border-radius: 6px; padding: .6rem .9rem; margin: -1rem 0 2rem; }