:root {
  --fg: #1a1a1a;
  --muted: #666;
  --bg: #fafafa;
  --accent: #0a58ca;
  --rule: #e5e5e5;
  --cover-shadow: rgba(0, 0, 0, 0.12);
}

@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e8e8e8;
    --muted: #9a9a9a;
    --bg: #151515;
    --accent: #79a8ff;
    --rule: #303030;
    --cover-shadow: rgba(0, 0, 0, 0.5);
  }
}

@view-transition {
  navigation: auto;
}

* { box-sizing: border-box; }

body {
  font-family: Georgia, "Iowan Old Style", "Palatino Linotype", serif;
  font-size: 18px;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
  max-width: 44rem;
  margin: 0 auto;
  padding: 2rem 1.25rem;
}


.prose {
  max-width: none;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 2rem;
}

.site-title {
  font-weight: 700;
  font-size: 1.25rem;
  text-decoration: none;
  color: var(--fg);
}

nav a {
  margin-left: 1rem;
  color: var(--muted);
  text-decoration: none;
}

nav a:hover { color: var(--accent); }

main h1 { font-size: 2rem; line-height: 1.25; margin: 0 0 1.5rem 0; }
main h2 { margin-top: 2rem; }

article > .post-cover {
  margin-bottom: 2.5rem;
}

article > .prose:first-child h1 {
  margin-top: 0;
}

.eyebrow {
  margin: 0 0 0.5rem 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
}

.eyebrow-link {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.eyebrow-link:hover {
  color: var(--accent);
  border-bottom-color: currentColor;
}

.lede {
  font-size: 1.15rem;
  line-height: 1.5;
  color: var(--fg);
  margin: 0 0 0.5rem 0;
}

.category-stats {
  margin: 0 0 2.5rem 0;
}

/* ================================================================== *
 * Home page (body.home) — editorial volume layout, full viewport width.
 * Each category is a "volume" with alternating image/text blocks.
 * ================================================================== */

body.home {
  max-width: none;
  margin: 0;
  padding: 0;
}

.home-header,
.home-footer {
  max-width: 72rem;
  margin: 0 auto;
  padding: 2rem 2rem 1rem 2rem;
}

.home-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 1rem;
  border-bottom: 1px solid var(--rule);
}

.home-main {
  max-width: 72rem;
  margin: 0 auto;
  padding: 0 2rem;
}

.home-footer {
  margin-top: 4rem;
  border-top: 1px solid var(--rule);
  padding-top: 1.5rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.home-footer a { color: var(--muted); text-decoration: none; }
.home-footer a:hover { color: var(--accent); }

/* Hero intro block */
.hero-intro {
  padding: 4rem 0 3rem 0;
  text-align: left;
  max-width: 48rem;
}

.hero-title {
  font-family: Georgia, "Iowan Old Style", serif;
  font-size: clamp(1.75rem, 5.5vw, 3.5rem);
  line-height: 1.1;
  letter-spacing: -0.015em;
  font-weight: 700;
  margin: 0 0 1.5rem 0;
  color: var(--fg);
  max-width: 22ch;
}

.hero-sub {
  font-size: 1.15rem;
  line-height: 1.55;
  color: var(--muted);
  margin: 0;
  max-width: 34rem;
}

/* Volume (category) section */
.volume {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 2.5rem;
  align-items: center;
  padding: 3rem 0;
  border-top: 1px solid var(--rule);
}

.volume-flipped {
  grid-template-columns: 1fr 1.1fr;
}

.volume-flipped .volume-figure { order: 2; }
.volume-flipped .volume-body { order: 1; }

.volume-figure a {
  display: block;
  line-height: 0;
  border-radius: 3px;
  overflow: hidden;
  box-shadow: 0 4px 32px var(--cover-shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.volume-figure a:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 40px var(--cover-shadow);
}

.volume-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* Placeholder shown for categories with no posts yet. */
.volume-placeholder {
  aspect-ratio: 16 / 9;
  background: repeating-linear-gradient(
    45deg,
    var(--rule),
    var(--rule) 1px,
    transparent 1px,
    transparent 12px
  );
  display: grid;
  place-items: center;
}
.volume-placeholder span {
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 0.3rem 0.75rem;
  background: var(--bg);
  border: 1px solid var(--rule);
  border-radius: 3px;
}
.volume-empty .volume-figure a:hover {
  transform: none;
  box-shadow: 0 4px 32px var(--cover-shadow);
}

.volume-body {
  min-width: 0;
}

.volume-number {
  font-family: Georgia, "Iowan Old Style", serif;
  font-size: 0.9rem;
  letter-spacing: 0.15em;
  color: var(--muted);
  margin: 0 0 1.25rem 0;
  font-feature-settings: "lnum";
}

.volume-number::after {
  content: "";
  display: inline-block;
  width: 3rem;
  height: 1px;
  background: currentColor;
  vertical-align: middle;
  margin-left: 0.75rem;
  opacity: 0.5;
}

.volume-name {
  font-family: Georgia, "Iowan Old Style", serif;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.05;
  letter-spacing: -0.015em;
  margin: 0 0 1.25rem 0;
}

.volume-name a {
  color: var(--fg);
  text-decoration: none;
  background-image: linear-gradient(var(--accent), var(--accent));
  background-size: 0 2px;
  background-position: 0 100%;
  background-repeat: no-repeat;
  transition: background-size 0.3s ease;
}

.volume-name a:hover {
  background-size: 100% 2px;
}

.volume-desc {
  font-size: 1.1rem;
  line-height: 1.55;
  color: var(--fg);
  margin: 0 0 1.5rem 0;
  max-width: 32rem;
}

.volume-meta {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
  margin: 0 0 1rem 0;
}

.volume-latest {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.4;
  color: var(--fg);
  max-width: 32rem;
}

.volume-latest-label {
  display: inline-block;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 700;
  margin-right: 0.5rem;
  vertical-align: middle;
}

.volume-latest a {
  color: var(--fg);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
}

.volume-latest a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.volume-cta {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 600;
}

.volume-cta a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
}

.volume-cta a:hover { opacity: 0.7; }

/* Stack on narrower screens */
@media (max-width: 44rem) {
  .home-header, .home-main, .home-footer { padding-left: 1.25rem; padding-right: 1.25rem; }
  .hero-intro { padding: 3rem 0 2rem 0; }
  .volume {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    padding: 3rem 0;
  }
  .volume-flipped { grid-template-columns: 1fr; }
  .volume-flipped .volume-figure { order: 0; }
  .volume-flipped .volume-body { order: 0; }
}

/* Category detail page — list with thumbnails */
.category-post-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.category-post-list li {
  margin: 0 0 0.5rem 0;
  padding: 0;
  border: 0;
}
.category-post {
  display: grid;
  grid-template-columns: 7rem 1fr;
  gap: 1rem;
  align-items: center;
  padding: 0.75rem;
  border: 1px solid transparent;
  border-radius: 4px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.category-post:hover {
  border-color: var(--rule);
  background: rgba(0,0,0,0.02);
}
@media (prefers-color-scheme: dark) {
  .category-post:hover { background: rgba(255,255,255,0.03); }
}
.category-post-thumb {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 3px;
}
.category-post-thumb-blank {
  aspect-ratio: 16 / 9;
  background: var(--rule);
  border-radius: 3px;
}
/* /recent/ — inline audio under each post row, sized to the body column
   (offset past the thumb) so the play control sits under the title. */
.recent-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin: 0 0 0.75rem 0;
}

/* Footer subscribe form */
.footer-subscribe {
  max-width: 32rem;
  margin: 3rem auto 1.5rem;
  padding: 1.25rem 1.25rem 1rem;
  border: 1px solid var(--rule);
  border-radius: 4px;
}
.footer-subscribe h3 { margin: 0 0 0.25rem 0; font-size: 1rem; }
.footer-subscribe-lede {
  margin: 0 0 0.875rem 0;
  font-size: 0.85rem;
  color: var(--muted, #666);
}
.footer-subscribe-email input {
  width: 100%;
  padding: 0.5rem 0.625rem;
  border: 1px solid var(--rule);
  border-radius: 3px;
  font: inherit;
  background: transparent;
  color: inherit;
  box-sizing: border-box;
}
.footer-subscribe-cats {
  border: 0;
  margin: 0.75rem 0 0 0;
  padding: 0;
  font-size: 0.8rem;
}
.footer-subscribe-cats legend {
  padding: 0;
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted, #666);
}
.footer-subscribe-cats label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin: 0.25rem 0.75rem 0 0;
}
.footer-subscribe-cats .cat-all {
  display: flex;
  margin: 0.4rem 0 0.25rem;
  font-weight: 600;
}
.footer-subscribe-cats .cat-list[aria-hidden="true"] {
  opacity: 0.45;
}
.footer-subscribe button {
  margin-top: 0.875rem;
  padding: 0.55rem 1rem;
  border: 1px solid currentColor;
  background: transparent;
  color: inherit;
  border-radius: 3px;
  font: inherit;
  cursor: pointer;
}
.footer-subscribe button:hover { background: rgba(0,0,0,0.04); }
@media (prefers-color-scheme: dark) {
  .footer-subscribe button:hover { background: rgba(255,255,255,0.05); }
}
.footer-subscribe-status {
  margin: 0.5rem 0 0 0;
  font-size: 0.8rem;
  color: var(--muted, #666);
  min-height: 1em;
}
.footer-subscribe-success {
  margin: 0;
  padding: 0.75rem;
  border: 1px solid var(--rule);
  border-radius: 3px;
  font-size: 0.9rem;
}
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0; border: 0;
  clip: rect(0,0,0,0); overflow: hidden;
  white-space: nowrap;
}
.recent-audio {
  display: block;
  width: calc(100% - 8rem);
  margin-left: 8rem;
  height: 32px;
}
@media (max-width: 44rem) {
  .recent-audio {
    width: calc(100% - 5.75rem);
    margin-left: 5.75rem;
  }
}
.category-post-body {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-width: 0;
}
.category-post-title {
  font-weight: 600;
  line-height: 1.3;
  color: var(--fg);
}
.category-post:hover .category-post-title {
  color: var(--accent);
}
.category-post-meta {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
}
@media (max-width: 28rem) {
  .category-post { grid-template-columns: 5rem 1fr; gap: 0.75rem; }
}

.post-cover {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  margin: 0 0 2rem 0;
  border-radius: 3px;
  box-shadow: 0 2px 12px var(--cover-shadow);
}

.image-fallback { display: none; }

@media (prefers-reduced-motion: reduce) {
  .video-cover { display: none; }
  .image-fallback { display: block; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

a { color: var(--accent); }

.post-list {
  list-style: none;
  padding: 0;
}

.post-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 0.5rem 0;
  border-bottom: 1px dashed var(--rule);
  gap: 1rem;
}

.post-list-meta {
  display: inline-flex;
  align-items: baseline;
  gap: 0.75rem;
  white-space: nowrap;
  flex-shrink: 0;
}

.post-list-cat {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: 3px;
  background: var(--cat-bg, rgba(0,0,0,0.06));
  color: var(--cat-fg, var(--muted));
}

/* Category-specific accent colors. Add new ones as categories expand. */
.post-list-cat[data-cat="computing"] {
  --cat-bg: rgba(107, 74, 138, 0.14);   /* muted purple */
  --cat-fg: #6b4a8a;
}
.post-list-cat[data-cat="shoes"] {
  --cat-bg: rgba(138, 90, 58, 0.14);    /* muted leather */
  --cat-fg: #8a5a3a;
}
.post-list-cat[data-cat="ai"] {
  --cat-bg: rgba(45, 115, 150, 0.14);   /* muted teal/steel */
  --cat-fg: #2d7396;
}
.post-list-cat[data-cat="maps"] {
  --cat-bg: rgba(38, 90, 64, 0.14);     /* forest */
  --cat-fg: #265a40;
}
.post-list-cat[data-cat="timepieces"] {
  --cat-bg: rgba(156, 96, 38, 0.14);    /* brass */
  --cat-fg: #9c6026;
}
.post-list-cat[data-cat="writing-systems"] {
  --cat-bg: rgba(74, 50, 90, 0.14);     /* ink */
  --cat-fg: #4a325a;
}
.post-list-cat[data-cat="locks-and-keys"] {
  --cat-bg: rgba(60, 60, 60, 0.14);     /* iron */
  --cat-fg: #3c3c3c;
}
.post-list-cat[data-cat="code-editors"] {
  --cat-bg: rgba(170, 60, 100, 0.14);   /* magenta */
  --cat-fg: #aa3c64;
}
.post-list-cat[data-cat="programming-languages"] {
  --cat-bg: rgba(180, 110, 30, 0.14);   /* amber */
  --cat-fg: #b46e1e;
}
.post-list-cat[data-cat="phones"] {
  --cat-bg: rgba(30, 100, 130, 0.14);   /* signal-blue */
  --cat-fg: #1e6482;
}
.post-list-cat[data-cat="video-games"] {
  --cat-bg: rgba(200, 50, 80, 0.14);    /* crimson */
  --cat-fg: #c83250;
}
.post-list-cat[data-cat="software-architecture"] {
  --cat-bg: rgba(100, 120, 80, 0.14);   /* olive */
  --cat-fg: #647850;
}
.post-list-cat[data-cat="bridges"] {
  --cat-bg: rgba(80, 100, 130, 0.14);   /* steel blue */
  --cat-fg: #506482;
}
.post-list-cat[data-cat="cryptography"] {
  --cat-bg: rgba(50, 90, 80, 0.14);     /* cipher green */
  --cat-fg: #325a50;
}
.post-list-cat[data-cat="money"] {
  --cat-bg: rgba(150, 120, 40, 0.14);   /* gold */
  --cat-fg: #967828;
}

@media (prefers-color-scheme: dark) {
  .post-list-cat[data-cat="computing"] {
    --cat-bg: rgba(179, 152, 210, 0.18);
    --cat-fg: #b398d2;
  }
  .post-list-cat[data-cat="shoes"] {
    --cat-bg: rgba(212, 168, 132, 0.18);
    --cat-fg: #d4a884;
  }
  .post-list-cat[data-cat="ai"] {
    --cat-bg: rgba(136, 189, 219, 0.2);
    --cat-fg: #8bbdd6;
  }
  .post-list-cat[data-cat="maps"] { --cat-bg: rgba(120, 180, 150, 0.18); --cat-fg: #78b496; }
  .post-list-cat[data-cat="timepieces"] { --cat-bg: rgba(210, 160, 100, 0.18); --cat-fg: #d2a064; }
  .post-list-cat[data-cat="writing-systems"] { --cat-bg: rgba(180, 150, 200, 0.18); --cat-fg: #b496c8; }
  .post-list-cat[data-cat="locks-and-keys"] { --cat-bg: rgba(170, 170, 170, 0.18); --cat-fg: #aaaaaa; }
  .post-list-cat[data-cat="code-editors"] { --cat-bg: rgba(210, 130, 170, 0.18); --cat-fg: #d282aa; }
  .post-list-cat[data-cat="programming-languages"] { --cat-bg: rgba(220, 170, 100, 0.18); --cat-fg: #dcaa64; }
  .post-list-cat[data-cat="phones"] { --cat-bg: rgba(120, 180, 210, 0.18); --cat-fg: #78b4d2; }
  .post-list-cat[data-cat="video-games"] { --cat-bg: rgba(230, 120, 150, 0.18); --cat-fg: #e67896; }
  .post-list-cat[data-cat="software-architecture"] { --cat-bg: rgba(170, 190, 140, 0.18); --cat-fg: #aabe8c; }
  .post-list-cat[data-cat="bridges"] { --cat-bg: rgba(140, 170, 210, 0.18); --cat-fg: #8caad2; }
  .post-list-cat[data-cat="cryptography"] { --cat-bg: rgba(120, 180, 150, 0.18); --cat-fg: #78b496; }
  .post-list-cat[data-cat="money"] { --cat-bg: rgba(220, 180, 100, 0.18); --cat-fg: #dcb464; }
}

.post-list time {
  color: var(--muted);
  font-size: 0.9rem;
  white-space: nowrap;
}

.post-audio {
  margin: 0 0 2rem 0;
  padding: 0.875rem 1rem;
  border: 1px solid var(--rule);
  border-radius: 4px;
  display: flex;
  align-items: center;
  gap: 1rem;
}
.post-audio figcaption {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
  white-space: nowrap;
}
.post-audio-dur {
  font-weight: 500;
  letter-spacing: 0.06em;
}
.post-audio audio {
  flex: 1;
  min-width: 0;
  height: 36px;
}

/* Post stats: heart button + read count, pinned below the article body
 * and above the prev/next nav. */
.post-stats {
  margin: 3rem 0 0 0;
  padding: 1rem 0 0 0;
  border-top: 1px solid var(--rule);
  display: flex;
  align-items: center;
  gap: 1.25rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.85rem;
}

.love-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: transparent;
  border: 1px solid var(--rule);
  border-radius: 999px;
  padding: 0.35rem 0.9rem;
  font: inherit;
  color: var(--muted);
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
}

.love-btn:hover:not(:disabled) {
  color: #c83250;
  border-color: #c83250;
}

.love-btn:active:not(:disabled) {
  transform: scale(0.96);
}

.love-btn.loved {
  color: #c83250;
  border-color: #c83250;
  background: rgba(200, 50, 80, 0.06);
}

.love-heart {
  font-size: 1rem;
  line-height: 1;
}

.love-count,
.read-count {
  font-variant-numeric: tabular-nums;
}

.read-count {
  color: var(--muted);
}

@media (prefers-color-scheme: dark) {
  .love-btn:hover:not(:disabled) { color: #ff6b85; border-color: #ff6b85; }
  .love-btn.loved { color: #ff6b85; border-color: #ff6b85; background: rgba(255, 107, 133, 0.08); }
}

.post-nav {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--rule);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.post-nav-link {
  display: block;
  text-decoration: none;
  color: var(--fg);
}

.post-nav-link.newer { text-align: right; }

.post-nav-label {
  display: block;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.25rem;
}

.post-nav-title {
  display: block;
  font-weight: 600;
  line-height: 1.3;
}

.post-nav-year {
  display: block;
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 0.25rem;
}

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

.footnotes {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  font-size: 0.92rem;
}
.footnotes hr { display: none; }
.footnotes ol { padding-left: 1.25rem; }
.footnotes p { margin: 0.25rem 0; }
.footnote-ref a { text-decoration: none; padding: 0 0.15em; }
.footnote-backref { text-decoration: none; margin-left: 0.3em; color: var(--muted); }

footer {
  margin-top: 4rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.85rem;
}
footer a { color: var(--muted); text-decoration: none; }
footer a:hover { color: var(--accent); }