/* pablin.me — "Byrne's Euclid"
   After Oliver Byrne's 1847 edition of Euclid's Elements, which replaced
   "the triangle ABC" with coloured figures. Two rules hold the system together:
     · Caslon carries content — headings, body copy, articles.
     · IBM Plex Mono carries furniture — nav, buttons, labels, captions, dates.
     · Colour is structural, never decorative: cobalt, vermilion, ochre. */

:root {
  --paper: #F4F1E8;
  --surface: #FBF9F3;
  --ink: #1B1917;
  --graphite: #6B6355;
  --line: #DCD5C4;
  --cobalt: #2C4C9B;
  --cobalt-soft: #E4E7F1;
  --red: #C2402D;
  --ochre: #D9A227;
  --max: 1080px;
  --radius: 2px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #17150F;
    --surface: #1E1B14;
    --ink: #EFEADF;
    --graphite: #A39885;
    --line: #332E24;
    --cobalt: #8CA3E0;
    --cobalt-soft: #20243A;
    --red: #E4694F;
    --ochre: #E5B547;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: 'Libre Caslon Text', Georgia, 'Times New Roman', serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

/* Furniture: every label, tag and caption is mono, uppercase, letterspaced. */
.eyebrow {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--red);
  margin: 0 0 14px;
}

/* Header */
header.site {
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--paper) 90%, transparent);
  backdrop-filter: saturate(160%) blur(10px);
}
header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  display: flex;
  align-items: baseline;
  gap: 1px;
  text-decoration: none;
  color: var(--ink);
  font-family: 'Libre Caslon Display', Georgia, serif;
  font-size: 25px;
  letter-spacing: -.01em;
}
.brand .dot { color: var(--red); }
.brand-back,
nav.site-nav a {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11.5px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--graphite);
  text-decoration: none;
}
.brand-back:hover,
nav.site-nav a:hover { color: var(--cobalt); }
nav.site-nav { display: flex; gap: 24px; }

/* Hero */
.hero { padding: 68px 0 20px; }
.hero .hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 44px;
  align-items: center;
}
.hero h1 {
  font-family: 'Libre Caslon Display', Georgia, serif;
  font-weight: 400;
  font-size: clamp(40px, 6vw, 66px);
  line-height: 1.04;
  margin: 0 0 20px;
  letter-spacing: -.015em;
  text-wrap: balance;
}
.hero h1 span { color: var(--red); }
.hero-grid h2 {
  font-family: 'Libre Caslon Display', Georgia, serif;
  font-weight: 400;
  font-size: clamp(30px, 4.4vw, 44px);
  line-height: 1.06;
  margin: 0 0 18px;
  letter-spacing: -.012em;
  text-wrap: balance;
}
.link-row { display: flex; gap: 10px; flex-wrap: wrap; }
.hero .lead {
  font-size: clamp(16.5px, 1.6vw, 18px);
  color: var(--graphite);
  max-width: 46ch;
  margin: 0 0 26px;
}

/* A framed figure — canvas, diagram or screenshot */
.canvas-frame {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
}
.canvas-frame canvas { display: block; width: 100%; height: auto; }
/* A portrait phone capture is ~294×640; left to fill a grid column it renders
   over a thousand pixels tall and shoves the headline below the fold. Keep
   device shots at device scale. */
.canvas-frame.device { max-width: 250px; margin-inline: auto; }
.canvas-caption {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10.5px;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--graphite);
  padding: 10px 14px;
  border-top: 1px solid var(--line);
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--ink);
  color: var(--paper);
  padding: 12px 20px;
  border-radius: var(--radius);
  text-decoration: none;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11.5px;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.button:hover { background: var(--cobalt); color: #FFF; }
.button.ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}
.button.ghost:hover { border-color: var(--cobalt); color: var(--cobalt); background: transparent; }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: 5px 10px;
  border-radius: 999px;
  background: var(--cobalt-soft);
  color: var(--cobalt);
}

/* Sections */
.section { padding: 68px 0; }
.section h2 {
  font-family: 'Libre Caslon Display', Georgia, serif;
  font-weight: 400;
  font-size: clamp(28px, 3.6vw, 40px);
  margin: 0 0 12px;
  letter-spacing: -.012em;
  line-height: 1.08;
}
.section .sub {
  color: var(--graphite);
  max-width: 60ch;
  margin: 0 0 40px;
  font-size: 16px;
}
.section.alt {
  background: var(--surface);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

/* Work / project cards */
.work-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.project-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  text-decoration: none;
  color: var(--ink);
  background: var(--surface);
  display: block;
  transition: border-color .15s ease;
}
.project-card:hover { border-color: var(--cobalt); }
.project-card .glyph { margin-bottom: 18px; }
.project-card h3 {
  font-family: 'Libre Caslon Display', Georgia, serif;
  font-weight: 400;
  font-size: 25px;
  letter-spacing: -.01em;
  margin: 0 0 8px;
}
.project-card p {
  color: var(--graphite);
  font-size: 15px;
  margin: 0 0 16px;
}
.project-card .meta { display: flex; gap: 8px; flex-wrap: wrap; }

/* Proposition grid — the numbered figures of the Elements */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.feature { background: var(--paper); padding: 28px; }
.feature .index {
  display: block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 14px;
}
/* A figure index carries a drawn glyph rather than a numeral, so it is set
   at figure size and may take its own colour, as Byrne colour-codes shapes. */
.feature .index.figure {
  font-family: 'Libre Caslon Text', Georgia, serif;
  font-size: 27px;
  line-height: 1;
  letter-spacing: 0;
  text-transform: none;
  margin-bottom: 12px;
}
.feature .index.c-cobalt { color: var(--cobalt); }
.feature .index.c-ochre { color: var(--ochre); }

.feature h3 {
  font-family: 'Libre Caslon Display', Georgia, serif;
  font-weight: 400;
  font-size: 21px;
  letter-spacing: -.01em;
  margin: 0 0 10px;
}
.feature p { margin: 0; color: var(--graphite); font-size: 15px; }

/* Tally's "what it does" grid is the one place five items must read as a
   single row. `#features` exists only on tally/index.html, so this is scoped
   rather than changing `.feature-grid`, which pablin.me's own index and
   milo/index.html also use. Below 1100px the shared auto-fit rule takes over
   again — five columns inside a narrower `.wrap` leaves too little measure. */
@media (min-width: 1100px) {
  #features .feature-grid { grid-template-columns: repeat(5, 1fr); }
  #features .feature { padding: 22px 18px; }
  #features .feature h3 { font-size: 18px; margin-bottom: 8px; }
  #features .feature p { font-size: 13.5px; line-height: 1.45; }
  #features .feature .index { margin-bottom: 10px; }
}

/* Ethos strip — a fixed ink band, deliberately not theme-relative:
   it should read as the same plate in light or dark mode. */
.strip {
  background: #1B1917;
  color: #F4F1E8;
  padding: 62px 0;
}
.strip .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}
.strip h2 {
  font-family: 'Libre Caslon Display', Georgia, serif;
  font-weight: 400;
  font-size: clamp(26px, 3vw, 34px);
  line-height: 1.1;
  letter-spacing: -.012em;
  margin: 0 0 10px;
  max-width: 18ch;
  color: #F4F1E8;
}
.strip p { color: rgba(244, 241, 232, .74); max-width: 46ch; margin: 0; font-size: 15.5px; }

/* Contact */
.contact-block { display: flex; align-items: baseline; gap: 18px; flex-wrap: wrap; }
.contact-block .email {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 19px;
  text-decoration: none;
  color: var(--ink);
  border-bottom: 2px solid var(--red);
}
.contact-block .email:hover { color: var(--cobalt); }

/* Footer */
footer.site { padding: 40px 0 60px; border-top: 1px solid var(--line); }
footer.site .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11.5px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--graphite);
}
footer.site nav { display: flex; gap: 20px; }
footer.site nav a { color: var(--graphite); text-decoration: none; }
footer.site nav a:hover { color: var(--cobalt); }

/* Article / prose pages (series posts, legal pages) */
.prose-wrap { max-width: 720px; }
.section h1 {
  font-family: 'Libre Caslon Display', Georgia, serif;
  font-weight: 400;
  font-size: clamp(32px, 4.4vw, 48px);
  line-height: 1.06;
  margin: 0 0 14px;
  letter-spacing: -.015em;
  text-wrap: balance;
}
/* Carries a date on an article, but a full sentence on some pages — so it
   stays sentence case; uppercasing a sentence at this size is unreadable. */
.byline {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--graphite);
  margin: 0 0 42px;
}
.prose {
  font-size: 17.5px;
  line-height: 1.72;
  color: var(--ink);
}
.prose h2 {
  font-family: 'Libre Caslon Display', Georgia, serif;
  font-weight: 400;
  font-size: 27px;
  text-transform: none;
  letter-spacing: -.012em;
  line-height: 1.15;
  margin: 46px 0 14px;
}
.prose h3 {
  font-family: 'Libre Caslon Text', Georgia, serif;
  font-weight: 700;
  text-transform: none;
  font-size: 19px;
  margin: 34px 0 10px;
}
.prose p { margin: 0 0 20px; }
.prose ul, .prose ol { margin: 0 0 20px; padding-left: 24px; }
.prose li { margin-bottom: 7px; }
.prose blockquote {
  border-left: 3px solid var(--red);
  padding-left: 18px;
  margin: 0 0 26px;
  color: var(--graphite);
  font-style: italic;
}
.prose img {
  max-width: 100%;
  display: block;
  margin: 8px 0 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}
.prose a { color: var(--cobalt); text-decoration-color: var(--line); text-underline-offset: 3px; }
.prose a:hover { text-decoration-color: var(--cobalt); }
.prose strong { font-weight: 700; }
.prose > p code, .prose li code {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13.5px;
  background: var(--cobalt-soft);
  color: var(--cobalt);
  padding: 2px 6px;
  border-radius: 2px;
}
.code-block {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 0 0 28px;
  background: var(--surface);
}
.code-lang {
  display: block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10.5px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--red);
  padding: 8px 16px;
  border-bottom: 1px solid var(--line);
}
.code-block pre { margin: 0; padding: 18px 20px; overflow-x: auto; }
.code-block code {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
  line-height: 1.62;
  color: var(--ink);
}
.prose-nav { margin-top: 52px; padding-top: 24px; border-top: 1px solid var(--line); }
.prose-nav a {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11.5px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--graphite);
  text-decoration: none;
}
.prose-nav a:hover { color: var(--cobalt); }

/* Series post list */
.post-list { border-top: 1px solid var(--line); margin-top: 32px; }
.post-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  color: var(--ink);
}
.post-row:hover .post-title { color: var(--cobalt); }
.post-title { font-size: 18px; }
.post-date {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11.5px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--graphite);
  white-space: nowrap;
}

/* Screenshot strip (reuses canvas-frame/canvas-caption for each item) */
.shot-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 20px;
}

/* Trust line — a small inline claim with a drawn icon, not a pill */
.trust-line {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--graphite);
  margin-top: 18px;
}

/* Legal / support pages */
.callout {
  background: var(--cobalt-soft);
  border-radius: var(--radius);
  padding: 22px 26px;
  margin: 0 0 36px;
}
.callout-label {
  display: block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10.5px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--cobalt);
  margin: 0 0 8px;
}
.callout p { margin: 0; color: var(--ink); font-size: 16px; }

.faq-list { border-top: 1px solid var(--line); margin: 24px 0 40px; }
.faq-item { padding: 24px 0; border-bottom: 1px solid var(--line); }
.faq-item h3 {
  font-family: 'Libre Caslon Display', Georgia, serif;
  font-weight: 400;
  font-size: 21px;
  letter-spacing: -.01em;
  margin: 0 0 8px;
}
.faq-item p { margin: 0; color: var(--graphite); font-size: 16px; }

.contact-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 30px;
  text-align: center;
  margin-top: 8px;
}
.contact-card p { margin: 0 0 12px; color: var(--graphite); }
.contact-card .email {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 17px;
  text-decoration: none;
  color: var(--ink);
  border-bottom: 2px solid var(--red);
}
.contact-card .email:hover { color: var(--cobalt); }

@media (max-width: 820px) {
  .hero .hero-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  body { font-size: 16.5px; }
  nav.site-nav { gap: 14px; font-size: 10.5px; }
  .hero { padding: 46px 0 8px; }
  .section { padding: 50px 0; }
  .prose { font-size: 17px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}