/* Fonts ------------------------------------------------------------ */

@font-face {
  font-family: 'Source Serif 4';
  src: url('/fonts/SourceSerif4-Variable.ttf') format('truetype-variations');
  font-weight: 200 900;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Source Serif 4';
  src: url('/fonts/SourceSerif4-Italic-Variable.ttf') format('truetype-variations');
  font-weight: 200 900;
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: 'Atkinson Hyperlegible';
  src: url('/fonts/AtkinsonHyperlegible-Regular.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Atkinson Hyperlegible';
  src: url('/fonts/AtkinsonHyperlegible-Bold.ttf') format('truetype');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* Tokens ----------------------------------------------------------- */

:root {
  --serif: 'Source Serif 4', Charter, 'Iowan Old Style', Georgia, serif;
  --sans:  'Atkinson Hyperlegible', ui-sans-serif, system-ui, -apple-system, sans-serif;

  --ink:        #1a1815;
  --ink-soft:   #4a4641;
  --ink-faint:  #8a857d;
  --paper:      #fbf9f4;
  --rule:       #d9d3c5;
  --link:       #5a3a1a;
  --link-hover: #1a1815;

  --measure: 34rem;       /* ~62ch at 18px */
  --leading: 1.65;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink:        #e8e3d8;
    --ink-soft:   #b8b1a3;
    --ink-faint:  #7a7468;
    --paper:      #1a1815;
    --rule:       #3a3530;
    --link:       #c9a578;
    --link-hover: #f0e9d8;
  }
}

/* Base ------------------------------------------------------------- */

*, *::before, *::after { box-sizing: border-box; }

html {
  font-size: 18px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-weight: 400;
  font-size: 1rem;
  line-height: var(--leading);
  font-feature-settings: "kern", "liga", "onum";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

::selection {
  background: var(--ink);
  color: var(--paper);
}

/* Layout ----------------------------------------------------------- */

.page {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 5rem 1.5rem 6rem;
}

@media (min-width: 40rem) {
  .page { padding: 6rem 2rem 8rem; }
}

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

.masthead {
  margin-bottom: 4rem;
}

.masthead h1 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 1.5rem;
  line-height: 1.2;
  margin: 0 0 0.25rem;
  letter-spacing: -0.01em;
}

.masthead h1 a {
  color: var(--ink);
  text-decoration: none;
  border: none;
}

.masthead .tagline {
  font-family: var(--sans);
  font-size: 0.8125rem;
  color: var(--ink-faint);
  margin: 0;
  letter-spacing: 0.02em;
}

/* Typography ------------------------------------------------------- */

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.25;
  color: var(--ink);
  letter-spacing: -0.005em;
}

article h1 {
  font-size: 1.875rem;
  margin: 0 0 0.5rem;
  font-weight: 500;
  letter-spacing: -0.015em;
}

.post-subtitle {
  font-size: 1.125rem;
  line-height: 1.4;
  font-style: italic;
  color: var(--ink-soft);
  margin: 0 0 1.5rem;
  font-weight: 400;
}

article h2 {
  font-size: 1.375rem;
  margin: 3rem 0 1rem;
}

article h3 {
  font-size: 1.125rem;
  margin: 2.5rem 0 0.75rem;
}

article h4 {
  font-size: 1.0625rem;
  font-weight: 500;
  font-style: italic;
  color: var(--ink);
  margin: 2.25rem 0 0.5rem;
  letter-spacing: 0;
}

article h4 em, article h4 i {
  font-style: italic;
}

p {
  margin: 0 0 1.25rem;
  hyphens: auto;
  -webkit-hyphens: auto;
}

em, i { font-style: italic; }
strong, b { font-weight: 600; }

a {
  color: var(--link);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
  transition: color 0.15s, border-color 0.15s;
}

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

/* Lists, quotes, code --------------------------------------------- */

ul, ol {
  margin: 0 0 1.25rem;
  padding-left: 1.5rem;
}

li { margin-bottom: 0.4rem; }

blockquote {
  margin: 1.75rem 0;
  padding: 0 0 0 1.25rem;
  border-left: 2px solid var(--rule);
  color: var(--ink-soft);
  font-style: italic;
}

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

code {
  font-family: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  font-size: 0.875em;
  background: rgba(0, 0, 0, 0.04);
  padding: 0.1em 0.35em;
  border-radius: 3px;
}

@media (prefers-color-scheme: dark) {
  code { background: rgba(255, 255, 255, 0.06); }
}

pre {
  font-family: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  font-size: 0.8125rem;
  line-height: 1.55;
  background: rgba(0, 0, 0, 0.035);
  padding: 1rem 1.25rem;
  border-radius: 4px;
  overflow-x: auto;
  margin: 1.5rem 0;
}

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

hr {
  border: none;
  border-top: 1px solid var(--rule);
  margin: 3rem auto;
  width: 4rem;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 2rem auto;
}

/* Index post list -------------------------------------------------- */

.posts {
  list-style: none;
  padding: 0;
  margin: 0;
}

.posts li {
  margin-bottom: 2.25rem;
  padding-bottom: 2.25rem;
  border-bottom: 1px solid var(--rule);
}

.posts li:last-child {
  border-bottom: none;
}

.posts .post-title {
  display: block;
  font-size: 1.25rem;
  font-weight: 500;
  line-height: 1.3;
  margin-bottom: 0.4rem;
  color: var(--ink);
  border: none;
  letter-spacing: -0.01em;
}

.posts .post-title:hover {
  color: var(--link);
}

.posts .post-meta {
  font-family: var(--sans);
  font-size: 0.8125rem;
  color: var(--ink-faint);
  margin-bottom: 0.6rem;
  letter-spacing: 0.02em;
}

.posts .post-dek {
  margin: 0 0 0.9rem;
  color: var(--ink-soft);
  font-style: italic;
  font-size: 1.0625rem;
  line-height: 1.5;
}

.posts .post-link {
  display: inline-block;
  font-family: var(--sans);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: var(--ink-faint);
  border: none;
  text-transform: uppercase;
}

.posts .post-link:hover {
  color: var(--ink);
}

/* Article meta + footer ------------------------------------------- */

.post-meta {
  font-family: var(--sans);
  font-size: 0.8125rem;
  color: var(--ink-faint);
  letter-spacing: 0.02em;
  margin: 0 0 2.5rem;
}

.post-meta time {
  font-variant-numeric: tabular-nums;
}

.site-footer {
  margin-top: 5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--rule);
  font-family: var(--sans);
  font-size: 0.8125rem;
  color: var(--ink-faint);
  letter-spacing: 0.02em;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.site-footer a {
  color: var(--ink-faint);
  border-bottom-color: transparent;
}

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

.post-nav {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--rule);
}

.post-nav a {
  font-family: var(--sans);
  font-size: 0.8125rem;
  color: var(--ink-faint);
  border: none;
  letter-spacing: 0.02em;
}

.post-nav a:hover {
  color: var(--ink);
}

/* Draftsman's notes ------------------------------------------------- */
/* Visible in local builds, stripped in CI. Editorial annotations the
   author wants to see in preview but never on the live site. */

.draftsman-note {
  margin: 2rem 0;
  padding: 0.85rem 1.1rem;
  background: #fff5d1;
  border-left: 3px solid #c48a14;
  border-radius: 2px;
  font-family: var(--sans);
  font-size: 0.875rem;
  line-height: 1.5;
  color: #5a4a10;
}

@media (prefers-color-scheme: dark) {
  .draftsman-note {
    background: #2a2410;
    border-left-color: #b88b1a;
    color: #d4b878;
  }
}

.draftsman-note-title {
  font-family: var(--sans);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.7rem;
  margin-bottom: 0.55rem;
  opacity: 0.75;
}

.draftsman-note p {
  margin: 0 0 0.5rem;
  font-family: var(--sans);
  font-style: normal;
  color: inherit;
  line-height: inherit;
  hyphens: none;
}

.draftsman-note p:last-child {
  margin-bottom: 0;
}