/* Hallmark · shape: Index-First · genre: editorial · theme: brand · redesign: full · job: listen, a publication: the newest piece leads, the archive follows
 * paper: oklch(97.2% 0.006 262) · accent: oklch(50.1% 0.192 265) · display: Bricolage Grotesque · body: Be Vietnam Pro · hero: banner · nav: edge-aligned bar, the wordmark left, four links and the mode switch right · footer: colophon, one line under a hairline · signature: the archive as a log, each year's numeral held in the margin while its posts scroll past
 * axes: light/grotesk/blue · posture: restrained · contrast: pass · fold: pass · modes: light+dark · imagery: none, the material is words · v2.0.0 */
/* Hallmark · pre-emit critique: P4 H4 E4 S4 R5 V3 · weakest: V, a dated list is how every blog looks; the years held large in the margin make it read as a log, the word in the blog's own name */
/* Hallmark · hero-review: fix · 5 findings · 3 resolved 1 partial 1 unresolved (no still of the interactive lab yet) */
/* Hallmark · finish-review: subagent · 6 findings · 6 resolved · gap: none; the tagline left the home page at the owner's request */
/* Hallmark · dropped the home tagline · the owner asked for it off the home page, since returning readers come for posts and the about page already says it */
/* Hallmark · waive 59 · Index-First, a dense list parted by hairlines · the archive is one log, and a 120px gap between years would break it into islands */
/* Hallmark · waive 78 · the topic page h2s head 23 lists of one to three posts · at 52px the topic names would outweigh the posts beneath them */
/* Hallmark · waive 79 · the about page holds four short lines and no visual · stretching it to the fold would mean writing copy the owner never wrote */

/* Hallmark · waive 49b · post titles in the archive and topic lists, the owner's own words, two lines at most at 320 · a post title is the link, and shortening it would rename the post */
/* Hallmark · dropped Tobi.log, Tất cả bài viết, 2026 · the wordmark already names the blog on every page, the archive needs no label over itself, and 2026 holds one post, now the lead with its date */
/* Hallmark · dismissed 77 · a blog front page is one archive list under the newest post, so counting it as sections misreads the list */

/* Layout: one capped container on twelve columns. The home page opens on one sentence and the newest post,
   then the archive: year numerals on columns 1 to 3, held in place while that year's rows scroll on 4 to 12.
   Posts read in a 65ch column on 1 to 8, the meta as marginalia on 10 to 12. */

.grid { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--gap-columns); }

/* Header: one line, the wordmark left, links and the mode switch right */
.site-head { border-bottom: var(--rule-hair) solid var(--color-rule); }
.head { display: flex; align-items: center; gap: var(--space-lg); min-height: 72px; padding-block: var(--space-sm); }
.wordmark { font-family: var(--font-display); font-weight: 700; font-size: var(--text-lg); letter-spacing: var(--tracking-display); color: var(--color-ink); text-decoration: none; white-space: nowrap; margin-right: auto; }
.wordmark:hover { color: var(--color-accent); }
.nav { display: flex; gap: var(--space-lg); font-size: var(--text-sm); }
.nav a { color: var(--color-ink-2); text-decoration: none; white-space: nowrap; padding-block: var(--space-xs); }
.nav a:hover { color: var(--color-ink); text-decoration: underline; text-decoration-color: var(--color-accent); }
.nav a[aria-current="page"] { color: var(--color-ink); text-decoration: underline; text-decoration-color: var(--color-accent); text-decoration-thickness: 2px; text-underline-offset: 0.45em; }

/* Mode switch: a moon while the page is light, a sun while it is dark */
.theme-toggle { display: inline-grid; place-items: center; flex: none; width: 44px; height: 44px; padding: 0; border: var(--rule-hair) solid var(--color-rule); border-radius: var(--radius-pill); background: transparent; color: var(--color-ink-2); cursor: pointer; transition: color var(--dur-short) var(--ease-out), border-color var(--dur-short) var(--ease-out), transform var(--dur-micro) var(--ease-out); }
.theme-toggle:hover { color: var(--color-ink); border-color: var(--color-muted); }
.theme-toggle:active { transform: translateY(1px); }
.theme-toggle:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 2px; }
.theme-toggle:disabled { opacity: 0.55; cursor: not-allowed; }
.theme-toggle svg { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.theme-toggle .i-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .i-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .i-moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .i-sun { display: block; }
  :root:not([data-theme="light"]) .theme-toggle .i-moon { display: none; }
}

.site-main { padding-block: var(--space-2xl) var(--space-3xl); }

/* Home: one sentence, then the newest post set large */
.hero { display: grid; grid-template-columns: minmax(0, 1fr); }
.latest { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--gap-columns); row-gap: var(--space-sm); }
.lead-date { grid-column: 1 / span 3; display: grid; align-content: start; gap: var(--space-xs); font-family: var(--font-display); font-weight: 700; font-size: var(--text-section); line-height: 1; letter-spacing: var(--tracking-display); color: var(--color-ink); }
.lead-date small { font-family: var(--font-body); font-weight: 400; font-size: var(--text-sm); letter-spacing: 0; color: var(--color-muted); }
.lead-body { grid-column: 4 / -1; display: grid; gap: var(--space-lg); min-width: 0; }
.lead-title { max-width: 22ch; font-size: var(--text-display-s); line-height: 1.02; text-wrap: balance; }
.lead-summary { font-size: var(--text-lead); line-height: 1.5; color: var(--color-ink-2); max-width: 52ch; }
.lead-actions { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-sm) var(--space-lg); }
.read { display: inline-flex; align-items: center; min-height: 48px; padding: 0 var(--space-lg); border: var(--rule-hair) solid var(--color-accent); border-radius: var(--radius-pill); background: var(--color-accent); color: var(--color-accent-ink); font-weight: 600; text-decoration: none; white-space: nowrap; transition: background-color var(--dur-short) var(--ease-out), transform var(--dur-micro) var(--ease-out); }
.read:hover { background: var(--color-ink); border-color: var(--color-ink); color: var(--color-paper); }
.read:active { transform: translateY(1px); }
.flag { font-size: var(--text-sm); color: var(--color-muted); }

/* Archive: the year held in the margin, its posts as hairline rows */
.archive { display: grid; margin-top: var(--space-3xl); }
.year { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--gap-columns); padding-block: var(--space-lg) var(--space-2xl); border-top: var(--rule-hair) solid var(--color-rule); }
.year-num { grid-column: 1 / span 3; align-self: start; position: sticky; top: var(--space-lg); font-size: var(--text-section); line-height: 1; color: var(--color-ink); }
.entries { grid-column: 4 / -1; list-style: none; margin: 0; padding: 0; min-width: 0; }
.entry { display: grid; grid-template-columns: 4.5rem minmax(0, 1fr) minmax(0, 14rem); align-items: baseline; column-gap: var(--space-lg); padding-block: var(--space-md); border-bottom: var(--rule-hair) solid var(--color-rule); }
.entry:last-child { border-bottom: 0; }
.entry time { font-size: var(--text-sm); color: var(--color-muted); }
.entry-title { max-width: none; font-family: var(--font-display); font-weight: 700; font-size: var(--text-lg); line-height: 1.3; letter-spacing: var(--tracking-display); text-wrap: balance; }
.entry-title a { color: var(--color-ink); text-decoration: none; }
.entry-title a:hover { color: var(--color-accent); text-decoration: underline; }
.entry-topics { font-size: var(--text-sm); color: var(--color-muted); text-align: right; }

/* Topic page */
.page-head { display: grid; gap: var(--space-md); margin-bottom: var(--space-2xl); }
.page-head h1 { font-size: var(--text-display-s); text-wrap: balance; }
.chips { display: flex; flex-wrap: wrap; gap: var(--space-xs); list-style: none; margin: 0; padding: 0; }
.chips a { display: inline-flex; align-items: center; gap: var(--space-xs); min-height: 44px; padding: 0 var(--space-md); border: var(--rule-hair) solid var(--color-rule); border-radius: var(--radius-pill); color: var(--color-ink); text-decoration: none; font-size: var(--text-sm); white-space: nowrap; transition: border-color var(--dur-short) var(--ease-out), transform var(--dur-micro) var(--ease-out); }
.chips a:hover { border-color: var(--color-accent); }
.chips a:active { transform: translateY(1px); }
.chips .num { color: var(--color-muted); }
.topic-index { display: grid; margin-top: var(--space-2xl); }
.topic { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--gap-columns); padding-block: var(--space-lg); border-top: var(--rule-hair) solid var(--color-rule); scroll-margin-top: var(--space-lg); }
.topic h2 { grid-column: 1 / span 3; font-size: var(--text-xl); line-height: 1.2; }
.topic .entries { grid-column: 4 / -1; }
.topic .entry { grid-template-columns: 5.5rem minmax(0, 1fr) auto; }
.topic .entry:first-child, .year .entry:first-child { padding-top: var(--space-2xs); }

/* Posts: a 65ch column with the meta in the margin */
.post-head { margin-bottom: var(--space-2xl); }
.post-head h1 { max-width: 22ch; font-size: var(--text-display-s); text-wrap: balance; }
.post-body { row-gap: var(--space-xl); }
.post-meta { grid-column: 9 / -1; grid-row: 1; align-self: start; position: sticky; top: var(--space-lg); display: grid; gap: var(--space-md); margin: 0; font-size: var(--text-sm); }
.post-meta > div { display: grid; gap: var(--space-3xs); }
.post-meta dt { color: var(--color-muted); }
.post-meta dd { margin: 0; color: var(--color-ink); }
.post-meta dd a { color: var(--color-ink); }
.post-meta dd a:hover { color: var(--color-accent); }
.prose { grid-column: 1 / span 8; grid-row: 1; min-width: 0; font-size: 1.0625rem; line-height: 1.7; }
.prose > * + * { margin-top: 1.1em; }
.prose p:not([class]) { max-width: 65ch; }
.prose h2 { max-width: 30ch; font-size: var(--text-2xl); line-height: 1.15; margin-top: 2em; }
.prose h3 { font-size: var(--text-xl); margin-top: 1.8em; }
.prose h4 { margin-top: 1.6em; font-family: var(--font-display); font-weight: 700; font-size: var(--text-lg); line-height: 1.3; }
.prose a { color: var(--color-accent); }
.prose ul, .prose ol { padding-left: 1.3em; max-width: 65ch; }
.prose li + li { margin-top: 0.35em; }
.prose blockquote { margin-inline: 0; padding-left: var(--space-lg); border-left: var(--rule-hair) solid var(--color-rule); color: var(--color-ink-2); }
.prose hr { border: 0; border-top: var(--rule-hair) solid var(--color-rule); margin-block: var(--space-2xl); }
.prose img { border-radius: var(--radius-card); }
.prose table { display: block; max-width: 100%; overflow-x: auto; border-collapse: collapse; font-size: var(--text-sm); font-variant-numeric: tabular-nums; }
.prose th, .prose td { text-align: left; padding: var(--space-xs) var(--space-sm); border-bottom: var(--rule-hair) solid var(--color-rule); vertical-align: top; }
.prose th { color: var(--color-muted); font-weight: 600; white-space: nowrap; }
.prose code { font-family: var(--font-outlier); font-size: 0.86em; background: var(--color-paper-2); padding: 0.1em 0.35em; border-radius: var(--radius-card); overflow-wrap: anywhere; }
.prose pre { margin-inline: 0; background: var(--color-paper-2); border-radius: var(--radius-card); padding: var(--space-md) var(--space-lg); overflow-x: auto; font-family: var(--font-outlier); font-size: 0.84rem; line-height: 1.6; }
.prose pre code { background: none; padding: 0; font-size: inherit; overflow-wrap: normal; }
.prose div.highlighter-rouge, .prose figure.highlight { margin-inline: 0; }

/* Code colours (Rouge) */
.highlight .c, .highlight .c1, .highlight .cm, .highlight .cs, .highlight .cp, .highlight .cd { color: var(--syn-comment); font-style: italic; }
.highlight .k, .highlight .kd, .highlight .kn, .highlight .kp, .highlight .kr, .highlight .kt, .highlight .kc, .highlight .ow { color: var(--syn-key); }
.highlight .s, .highlight .s1, .highlight .s2, .highlight .sb, .highlight .sc, .highlight .sd, .highlight .se, .highlight .sh, .highlight .si, .highlight .sx, .highlight .sr, .highlight .ss, .highlight .dl { color: var(--syn-str); }
.highlight .m, .highlight .mi, .highlight .mf, .highlight .mh, .highlight .mo, .highlight .il { color: var(--syn-num); }
.highlight .nf, .highlight .fm, .highlight .nc, .highlight .nn, .highlight .nb, .highlight .bp { color: var(--syn-fn); }
.highlight .err, .highlight .gd { color: var(--syn-err); }
.highlight .gi { color: var(--syn-str); }

/* Previous and next post */
.post-nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--gap-columns); margin-top: var(--space-3xl); padding-top: var(--space-lg); border-top: var(--rule-hair) solid var(--color-rule); }
.post-nav a { display: grid; gap: var(--space-2xs); color: var(--color-ink); text-decoration: none; font-family: var(--font-display); font-weight: 700; font-size: var(--text-lg); line-height: 1.3; min-width: 0; }
.post-nav a:hover { color: var(--color-accent); }
.post-nav span { font-family: var(--font-body); font-weight: 400; font-size: var(--text-sm); color: var(--color-muted); white-space: nowrap; }
.post-nav .older { grid-column: 2; text-align: right; }

/* About */
.letter { display: grid; gap: var(--space-lg); }
.letter p, .letter ul { max-width: 60ch; font-size: var(--text-lead); line-height: 1.6; }
.letter ul { padding-left: 1.2em; }
.letter a { color: var(--color-accent); }

/* Footer: a colophon */
.site-foot { border-top: var(--rule-hair) solid var(--color-rule); padding-block: var(--space-xl); font-size: var(--text-sm); color: var(--color-muted); }
.foot { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-sm) var(--space-lg); }
.foot-links { display: flex; gap: var(--space-lg); list-style: none; margin: 0; padding: 0; }
.foot-links a { color: var(--color-ink-2); }
.foot-links a:hover { color: var(--color-accent); }

@media (max-width: 60rem) {
  .lead-date { grid-column: 1 / -1; grid-auto-flow: column; justify-content: start; align-items: baseline; gap: var(--space-sm); font-size: var(--text-2xl); }
  .lead-body { grid-column: 1 / -1; }
  .year-num { grid-column: 1 / -1; position: static; font-size: var(--text-3xl); margin-bottom: var(--space-sm); }
  .archive { margin-top: var(--space-2xl); }
  .entries, .topic .entries { grid-column: 1 / -1; }
  .topic h2 { grid-column: 1 / -1; margin-bottom: var(--space-xs); }
  .post-meta { grid-column: 1 / -1; grid-row: 1; position: static; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-sm); }
  .prose { grid-column: 1 / -1; grid-row: 2; }
}
@media (max-width: 40rem) {
  .site-main { padding-block: var(--space-xl) var(--space-2xl); }
  .head { flex-wrap: wrap; row-gap: 0; min-height: 0; padding-block: var(--space-xs); }
  .nav { order: 3; width: 100%; overflow-x: auto; gap: var(--space-md); }
    .entry, .topic .entry { grid-template-columns: minmax(0, 1fr); row-gap: var(--space-2xs); }
  .entry-topics { text-align: left; }
  .entry-title { font-size: var(--text-md); }
  .post-meta { display: flex; flex-wrap: wrap; gap: var(--space-sm) var(--space-lg); }
  .post-nav { grid-template-columns: minmax(0, 1fr); }
  .post-nav .older { grid-column: 1; text-align: left; }
}
@media (prefers-reduced-motion: reduce) {
  .theme-toggle, .read, .chips a { transition: none; }
}