/* ==========================================================================
   Design language

   Editorial and architectural: square geometry, hairline rules, a serif display face
   over a precise sans, mono for labels and metadata. Depth comes from rules and tone,
   not rounded corners or drop shadows. Motion is slow and deliberate.
   ========================================================================== */

/* ==========================================================================
   Tokens
   ========================================================================== */

:root {
  color-scheme: light;

  --font-serif: "Instrument Serif", "Iowan Old Style", "Apple Garamond", Baskerville, "Times New Roman", serif;
  --font-sans: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --bg: #f6f5f1;
  --surface: #fbfaf8;
  --surface-2: #efede7;
  --text: #121212;
  --text-muted: #57554f;
  --border: #dedbd2;
  --border-strong: #c3bfb3;
  --accent: #4b3fd6;
  --accent-2: #2563c9;
  --focus: #4b3fd6;
  --code-bg: #f1efea;
  --code-border: #e2dfd6;

  /* WebGL backdrop palette (read by assets/js/backdrop.js) */
  --fx-1: #efecf3;
  --fx-2: #e4eaf2;
  --fx-3: #f4e7ea;
  --fx-4: #e3efe9;
  --fx-line: #cfc8ee;

  /* Status colours (badges, banners, callouts, toasts); all AA on --surface and its tints */
  --info: #1f5fbf;
  --new: #4b3fd6;
  --success: #17733a;
  --warning: #8a5300;
  --danger: #b42335;
  --on-solid: #ffffff;

  /* Announcement bar: ink on paper in light mode, a lifted panel in dark */
  --bar-bg: #121212;
  --bar-fg: #f6f5f1;

  --hairline: 1px solid var(--border);
  --elevation: 0 1px 0 rgb(0 0 0 / 0.02), 0 30px 60px -30px rgb(20 18 12 / 0.28);
  --container: 76rem;
  --prose: 42rem;
  --gutter: clamp(1.25rem, 4vw, 2.5rem);
  --header-h: 4.5rem;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #09090a;
    --surface: #0e0e10;
    --surface-2: #16161a;
    --text: #ecebe6;
    --text-muted: #9a9891;
    --border: #232327;
    --border-strong: #3a3a40;
    --accent: #a99fff;
    --accent-2: #7cc7ff;
    --focus: #a99fff;
    --code-bg: #0c0c0e;
    --code-border: #1f1f24;
    --fx-1: #0e0c24;
    --fx-2: #0a2233;
    --fx-3: #2c0f33;
    --fx-4: #0b2e2b;
    --fx-line: #352e74;
    --info: #7cb8ff;
    --new: #a99fff;
    --success: #6fdc8c;
    --warning: #f5c451;
    --danger: #ff8b98;
    --on-solid: #0a0b0f;
    --bar-bg: #18171c;
    --bar-fg: #ecebe6;
    --elevation: 0 1px 0 rgb(255 255 255 / 0.03) inset, 0 40px 80px -30px rgb(0 0 0 / 0.8);
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #09090a;
  --surface: #0e0e10;
  --surface-2: #16161a;
  --text: #ecebe6;
  --text-muted: #9a9891;
  --border: #232327;
  --border-strong: #3a3a40;
  --accent: #a99fff;
  --accent-2: #7cc7ff;
  --focus: #a99fff;
  --code-bg: #0c0c0e;
  --code-border: #1f1f24;
  --fx-1: #0e0c24;
  --fx-2: #0a2233;
  --fx-3: #2c0f33;
  --fx-4: #0b2e2b;
  --fx-line: #352e74;
  --info: #7cb8ff;
  --new: #a99fff;
  --success: #6fdc8c;
  --warning: #f5c451;
  --danger: #ff8b98;
  --on-solid: #0a0b0f;
  --bar-bg: #18171c;
  --bar-fg: #ecebe6;
  --elevation: 0 1px 0 rgb(255 255 255 / 0.03) inset, 0 40px 80px -30px rgb(0 0 0 / 0.8);
}

/* ==========================================================================
   Base
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: calc(var(--header-h) + 1.5rem);
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  font-feature-settings: "cv11", "ss01", "ss03";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}

/* Paper grain. Fine pointers only: a static layer is cheap, but phones don't need it. */
@media (pointer: fine) {
  body::after {
    content: "";
    position: fixed;
    inset: 0;
    z-index: 200;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.6 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    opacity: 0.035;
    pointer-events: none;
  }
  :root[data-theme="dark"] body::after { opacity: 0.06; }
}
@media (pointer: fine) and (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) body::after { opacity: 0.06; }
}

main { flex: 1; }
main:focus { outline: none; }

img, svg, video { max-width: 100%; height: auto; }

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
}

:focus-visible {
  outline: 1px solid var(--focus);
  outline-offset: 4px;
}

::selection { background: color-mix(in srgb, var(--accent) 24%, transparent); }

button { font: inherit; }

.sr-only {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 300;
  padding: 0.7rem 1rem;
  background: var(--text);
  color: var(--bg);
  font: 500 0.75rem/1 var(--font-mono);
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
  transform: translateY(-200%);
}
.skip-link:focus { transform: none; }

.container {
  width: 100%;
  max-width: calc(var(--container) + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.container--prose { max-width: calc(var(--prose) + 2 * var(--gutter)); }

/* Shared type styles */
.label,
.eyebrow,
.section__title,
.post-meta,
.card__meta,
.footer-col__title {
  font-family: var(--font-mono);
  font-weight: 500;
  text-transform: uppercase;
}

/* ==========================================================================
   WebGL backdrop
   ========================================================================== */

.backdrop,
.backdrop-fallback {
  position: fixed;
  inset: 0 0 auto;
  width: 100%;
  height: 100vh;
  height: 100lvh;
  z-index: -1;
  pointer-events: none;
}

.backdrop {
  display: block;
  opacity: 0;
  transition: opacity 1.4s ease;
}
.has-webgl .backdrop { opacity: 1; }
.backdrop-off .backdrop { opacity: 0; }

.backdrop-fallback {
  z-index: -2;
  background:
    radial-gradient(60% 50% at 15% 20%, var(--fx-3), transparent 70%),
    radial-gradient(50% 60% at 85% 30%, var(--fx-2), transparent 70%),
    radial-gradient(40% 40% at 60% 90%, var(--fx-4), transparent 70%),
    var(--fx-1);
}

/* ==========================================================================
   Buttons, icon buttons, chips, kbd
   ========================================================================== */

.button {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  min-height: 3rem;
  padding: 0 1.4rem;
  overflow: hidden;
  border: 1px solid var(--text);
  background: transparent;
  color: var(--text);
  font: 500 0.75rem/1 var(--font-mono);
  letter-spacing: 0.1em;
  text-decoration: none;
  text-transform: uppercase;
  cursor: pointer;
  isolation: isolate;
  transition: color 0.5s var(--ease-out), border-color 0.5s var(--ease-out);
}
.button .icon { width: 1rem; height: 1rem; }
.button > [aria-hidden="true"] { transition: transform 0.5s var(--ease-out); }
.button:hover > [aria-hidden="true"] { transform: translateX(4px); }

/* A fill that wipes in from the left */
.button::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--text);
  transform: scaleX(0);
  transform-origin: 100% 50%;
  transition: transform 0.6s var(--ease-out);
}
.button:hover::before { transform: scaleX(1); transform-origin: 0 50%; }
.button:hover { color: var(--bg); }

.button--primary { background: var(--text); color: var(--bg); }
.button--primary::before { background: var(--accent); }
.button--primary:hover { border-color: var(--accent); color: var(--on-solid); }

.button--ghost {
  border-color: var(--border-strong);
  background: color-mix(in srgb, var(--bg) 40%, transparent);
}
.button--ghost:hover { border-color: var(--text); }

.icon-button {
  display: grid;
  flex: none;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border: var(--hairline);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  transition: border-color 0.3s, background-color 0.3s;
}
.icon-button:hover { border-color: var(--text); }
.icon-button svg { width: 1.05rem; height: 1.05rem; }
.icon-button[hidden] { display: none; }

.chip-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 2.25rem;
  padding: 0 0.9rem;
  border: var(--hairline);
  background: transparent;
  color: var(--text-muted);
  font: 500 0.6875rem/1 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color 0.3s, border-color 0.3s;
}
.chip-button .icon { width: 0.9rem; height: 0.9rem; }
.chip-button:hover { border-color: var(--text); color: var(--text); }
.chip-button[hidden] { display: none; }

kbd {
  display: inline-grid;
  place-items: center;
  min-width: 1.4rem;
  height: 1.4rem;
  padding: 0 0.35rem;
  border: var(--hairline);
  background: var(--surface-2);
  color: var(--text-muted);
  font: 500 0.6875rem/1 var(--font-mono);
}

/* ==========================================================================
   Announcement bar
   ========================================================================== */

.announcement {
  --tone: var(--info);
  position: relative;
  z-index: 51;
  overflow: hidden;
  border-bottom: var(--hairline);
  background: var(--bar-bg);
  color: var(--bar-fg);
  font-size: 0.8125rem;
  transition: height 0.4s var(--ease-out), opacity 0.4s;
}
.announcement--new { --tone: var(--new); }
.announcement--success { --tone: var(--success); }
.announcement--warning { --tone: var(--warning); }
.announcement--danger { --tone: var(--danger); }
.announcement.is-leaving { height: 0 !important; opacity: 0; }

.announcement__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  min-height: 2.75rem;
  padding-block: 0.5rem;
}
.announcement__icon { display: grid; }
.announcement__icon .icon { width: 1rem; height: 1rem; }
.announcement__text { margin: 0; line-height: 1.5; text-align: center; letter-spacing: 0.01em; }
.announcement__text strong { font-weight: 600; }
.announcement__link {
  margin-left: 0.5rem;
  color: inherit;
  font: 500 0.6875rem/1 var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration-color: color-mix(in srgb, currentColor 45%, transparent);
  white-space: nowrap;
}
.announcement__link:hover { text-decoration-color: currentColor; }
.announcement .badge--solid { background: var(--bar-fg); color: var(--bar-bg); }
.announcement__close {
  position: absolute;
  right: var(--gutter);
  width: 2rem;
  height: 2rem;
  border-color: transparent;
  color: inherit;
}
.announcement__close:hover { border-color: color-mix(in srgb, currentColor 40%, transparent); }
.announcement__close svg { width: 0.9rem; height: 0.9rem; }
@media (max-width: 47.99rem) {
  .announcement__inner { justify-content: flex-start; padding-right: 2.5rem; }
  .announcement__text { text-align: left; }
}

/* ==========================================================================
   Header
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  border-bottom: 1px solid transparent;
  background: transparent;
  transition: transform 0.5s var(--ease-out), border-color 0.4s, background-color 0.4s;
}
.site-header.is-scrolled {
  border-bottom-color: var(--border);
  background: var(--bg);
}
/* Blur only where it's cheap; over a live canvas it costs every frame on phones */
@media (pointer: fine) {
  .site-header.is-scrolled {
    background: color-mix(in srgb, var(--bg) 82%, transparent);
    -webkit-backdrop-filter: blur(18px) saturate(1.3);
    backdrop-filter: blur(18px) saturate(1.3);
  }
}
.site-header.is-hidden { transform: translateY(-100%); }

.site-header__inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  height: 100%;
}

.brand {
  margin-right: auto;
  color: var(--text);
  font: 400 1.5rem/1 var(--font-serif);
  letter-spacing: -0.01em;
  text-decoration: none;
}

.nav-wrap { min-width: 0; margin-right: 1rem; }

.nav {
  display: flex;
  gap: 2rem;
  margin: 0;
  padding: 0;
  overflow-x: auto;
  list-style: none;
}

.nav a {
  position: relative;
  display: block;
  padding-block: 0.4rem;
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.3s;
}
.nav a::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: 100% 50%;
  transition: transform 0.5s var(--ease-out);
}
.nav a:hover,
.nav a[aria-current] { color: var(--text); }
.nav a:hover::after,
.nav a[aria-current]::after { transform: scaleX(1); transform-origin: 0 50%; }

@media (max-width: 47.99rem) {
  .nav-toggle { order: 1; }
  .nav-wrap { margin-right: 0; }
  .js .nav-wrap {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    padding: 1rem var(--gutter) 1.5rem;
    border-block: var(--hairline);
    background: var(--bg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.3s, transform 0.5s var(--ease-out), visibility 0.5s;
  }
  .js .nav-wrap.is-open { opacity: 1; visibility: visible; transform: none; }
  .js .nav { flex-direction: column; gap: 0; overflow: visible; }
  .js .nav li + li { border-top: var(--hairline); }
  .js .nav a { padding-block: 0.9rem; color: var(--text); font: 400 2rem/1.1 var(--font-serif); }
  .js .nav a::after { display: none; }
  .js .nav a[aria-current]::before { content: "→ "; color: var(--accent); }
}
@media (min-width: 48rem) {
  .nav-toggle { display: none !important; }
}

.theme-toggle .icon-sun,
.theme-toggle[aria-pressed="true"] .icon-moon { display: none; }
.theme-toggle[aria-pressed="true"] .icon-sun { display: block; }

/* Reading progress (posts) */
.progress {
  position: fixed;
  inset: 0 0 auto;
  z-index: 60;
  height: 2px;
  pointer-events: none;
}
.progress span {
  display: block;
  height: 100%;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: 0 50%;
}

/* Search trigger */
.search-trigger {
  display: inline-flex;
  flex: none;
  align-items: center;
  gap: 0.6rem;
  height: 2.5rem;
  padding: 0 0.45rem 0 0.85rem;
  border: var(--hairline);
  background: transparent;
  color: var(--text-muted);
  font: 500 0.6875rem/1 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: border-color 0.3s, color 0.3s;
}
.search-trigger:hover { border-color: var(--text); color: var(--text); }
.search-trigger .icon { width: 0.95rem; height: 0.95rem; }
.search-trigger__label { min-width: 5rem; text-align: left; }
.search-trigger[hidden] { display: none; }
@media (max-width: 47.99rem) {
  .search-trigger { justify-content: center; width: 2.5rem; padding: 0; }
  .search-trigger__label, .search-trigger__kbd { display: none; }
}

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  position: relative;
  display: flex;
  align-items: flex-end;
  padding-block: clamp(5rem, 16vh, 10rem) clamp(3rem, 8vh, 5rem);
}

.hero--home {
  align-items: center;
  min-height: calc(min(94vh, 58rem) - var(--header-h));
}

/* Blend the shader into the solid page surface */
.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 8rem;
  background: linear-gradient(to bottom, transparent, var(--bg));
  pointer-events: none;
}

.hero__inner { position: relative; z-index: 1; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  margin: 0 0 2rem;
  color: var(--text-muted);
  font-size: 0.6875rem;
  line-height: 1;
  letter-spacing: 0.16em;
}
.eyebrow::before {
  content: "";
  width: 3rem;
  height: 1px;
  background: currentColor;
}

.hero__title {
  max-width: 19ch;
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(3.25rem, 1.4rem + 6vw, 7.25rem);
  font-weight: 400;
  line-height: 0.92;
  letter-spacing: -0.025em;
  text-wrap: balance;
}
.hero__title em,
.hero__title .word:last-child .word__inner {
  color: var(--accent);
  font-style: italic;
}

.hero__title--post {
  max-width: 20ch;
  font-size: clamp(2.6rem, 1.6rem + 4vw, 5rem);
  line-height: 1;
  letter-spacing: -0.02em;
}

.hero__lede {
  max-width: 36rem;
  margin: 2rem 0 0;
  color: var(--text-muted);
  font-size: clamp(1.0625rem, 1rem + 0.45vw, 1.25rem);
  line-height: 1.6;
  text-wrap: pretty;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2.75rem;
}

.hero__stats {
  display: grid;
  grid-template-columns: repeat(3, max-content);
  gap: 0 3.5rem;
  margin: 4rem 0 0;
  padding-top: 1.5rem;
  border-top: var(--hairline);
}
.stat { display: flex; flex-direction: column-reverse; gap: 0.6rem; }
.stat__label {
  color: var(--text-muted);
  font: 500 0.625rem/1 var(--font-mono);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.stat__value {
  margin: 0;
  font: 400 2.25rem/1 var(--font-serif);
  font-variant-numeric: tabular-nums;
}
.stat__value--date { font-size: 1.5rem; line-height: 1.5; }
@media (max-width: 30rem) {
  .hero__stats { grid-template-columns: repeat(2, max-content); gap: 1.5rem 2.5rem; }
}

/* Split-word title (main.js) */
.word {
  display: inline-block;
  overflow: hidden;
  margin-bottom: -0.12em;
  padding-bottom: 0.12em;
  vertical-align: top;
}
.word__inner { display: inline-block; padding-right: 0.03em; }

.scroll-cue {
  position: absolute;
  right: var(--gutter);
  bottom: 2.5rem;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.9rem;
  color: var(--text-muted);
  font: 500 0.625rem/1 var(--font-mono);
  letter-spacing: 0.18em;
  text-decoration: none;
  text-transform: uppercase;
}
.scroll-cue__label { writing-mode: vertical-rl; }
.scroll-cue__line {
  position: relative;
  width: 1px;
  height: 4rem;
  overflow: hidden;
  background: var(--border);
}
.scroll-cue__line::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--text);
  transform: translateY(-100%);
  animation: cue 2.4s var(--ease-in-out) infinite;
}
@keyframes cue {
  0% { transform: translateY(-100%); }
  50% { transform: translateY(0); }
  100% { transform: translateY(100%); }
}
@media (max-width: 40rem), (max-height: 44rem) { .scroll-cue { display: none; } }

/* Post hero */
.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem 1rem;
  margin: 0 0 1.75rem;
  color: var(--text-muted);
  font-size: 0.6875rem;
  line-height: 1.4;
  letter-spacing: 0.12em;
}
.post-meta > [aria-hidden="true"] { opacity: 0.5; }

.post-hero__footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: var(--hairline);
}
.post-hero__footer:not(:has(> :not([hidden]))) { display: none; }
.share { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.share[hidden] { display: none; }

/* ==========================================================================
   Surface + sections
   ========================================================================== */

.surface {
  position: relative;
  padding-block: 2rem 8rem;
  background: var(--bg);
  counter-reset: section;
}

.section { padding-block: 2.5rem; }
.section + .section { padding-top: 4rem; }

/* Numbered section labels: "01 — Featured" followed by a rule */
.section__title {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 0 0 1.75rem;
  color: var(--text-muted);
  font-size: 0.6875rem;
  line-height: 1;
  letter-spacing: 0.16em;
}
.section__title::before {
  counter-increment: section;
  content: counter(section, decimal-leading-zero) "  —";
  color: var(--text);
  white-space: pre;
}
.section__title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}

.section__head {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 1.75rem;
}
.section__head .section__title { flex: 1; margin: 0; }
.section__link {
  color: var(--text);
  font: 500 0.6875rem/1 var(--font-mono);
  letter-spacing: 0.1em;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
}
.section__link:hover { color: var(--accent); }

/* ==========================================================================
   Badges and tags
   ========================================================================== */

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.badge {
  --tone: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 0.45em;
  min-height: 1.6rem;
  padding: 0 0.6em;
  border: 1px solid color-mix(in srgb, var(--tone) 38%, transparent);
  background: color-mix(in srgb, var(--tone) 6%, transparent);
  color: var(--tone);
  font: 500 0.625rem/1 var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  white-space: nowrap;
  text-decoration: none;
  vertical-align: middle;
}
.badge svg { width: 0.85em; height: 0.85em; }

.badge--accent { --tone: var(--accent); }
.badge--new { --tone: var(--new); }
.badge--info { --tone: var(--info); }
.badge--success { --tone: var(--success); }
.badge--warning { --tone: var(--warning); }
.badge--danger { --tone: var(--danger); }

.badge--solid {
  border-color: transparent;
  background: var(--new);
  color: var(--on-solid);
}

/* Tags read as quiet metadata; only the indexed variant gets a frame */
.badge--tag {
  min-height: 0;
  padding: 0;
  border: 0;
  background: none;
  letter-spacing: 0.04em;
  text-transform: none;
}
.badge--lg {
  min-height: 2.5rem;
  padding: 0 0.9rem;
  border: var(--hairline);
  font-size: 0.75rem;
}

a.badge { transition: color 0.3s, border-color 0.3s, background-color 0.3s; }
a.badge:hover { --tone: var(--text); border-color: var(--text); }
a.badge--tag:not(.badge--lg):hover { text-decoration: underline; }

.badge__count {
  margin-left: 0.35rem;
  padding-left: 0.6rem;
  border-left: var(--hairline);
  color: var(--text-muted);
}

/* A square "live" marker with a slow ping */
.badge--pulse::before {
  content: "";
  width: 0.5em;
  height: 0.5em;
  background: currentColor;
  box-shadow: 0 0 0 0 color-mix(in srgb, var(--tone) 60%, transparent);
  animation: ping 2.4s var(--ease-out) infinite;
}
@keyframes ping {
  70%, 100% { box-shadow: 0 0 0 0.5em transparent; }
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.tag-cloud--index { margin-bottom: 4rem; }

/* ==========================================================================
   Cards. Lists sit in a hairline grid; each cell lights up on hover with corner marks.
   ========================================================================== */

.post-list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  border: var(--hairline);
  background: var(--border);
  list-style: none;
  counter-reset: card;
}
.post-list > li { display: flex; counter-increment: card; }
.post-list > li > .card { flex: 1; }

@media (min-width: 48rem) {
  .post-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  /* An odd last card spans the row, so no empty cell shows the grid colour */
  .post-list > li:last-child:nth-child(odd) { grid-column: 1 / -1; }
}

.card {
  --corner: color-mix(in srgb, var(--text) 70%, transparent);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  height: 100%;
  min-height: 17rem;
  padding: clamp(1.5rem, 3vw, 2.25rem);
  background: var(--surface);
  isolation: isolate;
  transition: background-color 0.5s var(--ease-out);
}
.card > * { margin: 0; }

/* Pointer spotlight (positions set by main.js) plus four corner marks, revealed on hover */
.card::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(var(--corner), var(--corner)) top left / 12px 1px,
    linear-gradient(var(--corner), var(--corner)) top left / 1px 12px,
    linear-gradient(var(--corner), var(--corner)) top right / 12px 1px,
    linear-gradient(var(--corner), var(--corner)) top right / 1px 12px,
    linear-gradient(var(--corner), var(--corner)) bottom left / 12px 1px,
    linear-gradient(var(--corner), var(--corner)) bottom left / 1px 12px,
    linear-gradient(var(--corner), var(--corner)) bottom right / 12px 1px,
    linear-gradient(var(--corner), var(--corner)) bottom right / 1px 12px,
    radial-gradient(28rem circle at var(--mx, 50%) var(--my, 0%), color-mix(in srgb, var(--accent) 8%, transparent), transparent 60%);
  background-repeat: no-repeat;
  opacity: 0;
  transition: opacity 0.5s var(--ease-out);
  pointer-events: none;
}
.card:hover::before { opacity: 1; }
.card:hover { background: color-mix(in srgb, var(--surface) 70%, var(--bg)); }

.card__top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

/* Index number, e.g. "No. 03" */
.post-list .card__top::before {
  content: "No. " counter(card, decimal-leading-zero);
  order: -1;
  width: 100%;
  margin-bottom: 0.75rem;
  color: var(--text-muted);
  font: 400 1rem/1 var(--font-serif);
  font-style: italic;
}

.card__meta {
  color: var(--text-muted);
  font-size: 0.6875rem;
  line-height: 1.4;
  letter-spacing: 0.1em;
}

.card__title {
  max-width: 24ch;
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 1.4rem + 1vw, 2.35rem);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.015em;
  text-wrap: balance;
}

/* Whole card is clickable; the link stays the single focus stop */
.card__link { color: var(--text); text-decoration: none; }
.card__link::after {
  content: "";
  position: absolute;
  inset: 0;
}
.card__link:focus-visible { outline: none; }
.card__link:focus-visible::after {
  outline: 1px solid var(--focus);
  outline-offset: -6px;
}

.card__excerpt {
  max-width: 52ch;
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.65;
}

.card__more {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: auto !important;
  padding-top: 1.25rem;
  border-top: var(--hairline);
  color: var(--text);
  font: 500 0.6875rem/1 var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.card__arrow { margin-left: auto; transition: transform 0.5s var(--ease-out); }
.card:hover .card__arrow { transform: translateX(6px); }

/* Featured: taller, with an accent rule that draws across the top on hover */
.card--feature {
  min-height: 24rem;
  border: var(--hairline);
}
.card--feature::after {
  content: "";
  position: absolute;
  inset: -1px -1px auto;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.8s var(--ease-out);
}
.card--feature:hover::after { transform: scaleX(1); }
.card--feature .card__top { margin-bottom: auto; }
.card--feature .card__title { font-size: clamp(2.1rem, 1.6rem + 1.6vw, 3rem); }

/* ==========================================================================
   Carousels (Swiper)
   ========================================================================== */

.swiper {
  --swiper-theme-color: var(--accent);
}
.swiper-slide { height: auto; }

.carousel-controls {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.carousel-btn {
  display: grid;
  place-items: center;
  width: 3rem;
  height: 3rem;
  padding: 0;
  border: var(--hairline);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  transition: border-color 0.3s, opacity 0.3s;
}
.carousel-btn:hover { border-color: var(--text); }
.carousel-btn svg { width: 1rem; height: 1rem; }
.carousel-btn.swiper-button-disabled { opacity: 0.35; cursor: not-allowed; }
.carousel-btn.swiper-button-lock { display: none; }

.carousel-controls .swiper-pagination {
  position: static;
  display: flex;
  flex: 1;
  gap: 0.5rem;
  width: auto;
  transform: none;
}
.carousel-controls .swiper-pagination-bullet {
  flex: 1;
  max-width: 4rem;
  height: 1px;
  margin: 0 !important;
  border-radius: 0;
  background: var(--border-strong);
  opacity: 1;
  transition: background-color 0.4s;
}
.carousel-controls .swiper-pagination-bullet-active { height: 2px; background: var(--text); }
.carousel-controls .swiper-pagination-lock { display: none; }

/* Without JS (or before Swiper loads): a native scroll-snap row */
[data-carousel]:not(.is-ready) .carousel-controls { display: none; }
.swiper:not(.swiper-initialized) .swiper-wrapper {
  gap: 1.25rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
}
.swiper:not(.swiper-initialized) .swiper-slide {
  width: min(85%, 30rem);
  scroll-snap-align: start;
}
.gallery .swiper:not(.swiper-initialized) .swiper-slide { width: 100%; }

/* ==========================================================================
   Prose
   ========================================================================== */

.prose {
  font-size: clamp(1.0625rem, 1rem + 0.25vw, 1.125rem);
  line-height: 1.78;
}

.prose > * { margin-block: 0; }
.prose > * + * { margin-block-start: 1.3em; }

.prose :is(h2, h3, h4) {
  position: relative;
  color: var(--text);
  text-wrap: balance;
}
.prose h2 {
  margin-block-start: 2.6em;
  font-family: var(--font-serif);
  font-size: clamp(2rem, 1.6rem + 1.4vw, 2.75rem);
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: -0.015em;
}
.prose h3 {
  margin-block-start: 2em;
  font-size: clamp(1.15rem, 1.05rem + 0.4vw, 1.3rem);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.015em;
}
.prose h4 {
  margin-block-start: 1.75em;
  font: 500 0.75rem/1.4 var(--font-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.prose :is(h2, h3, h4) + * { margin-block-start: 0.8em; }

.prose a {
  color: var(--text);
  text-decoration-color: color-mix(in srgb, var(--accent) 60%, transparent);
  transition: text-decoration-color 0.3s, color 0.3s;
}
.prose a:hover { color: var(--accent); text-decoration-color: var(--accent); }

.heading-anchor {
  position: absolute;
  right: 100%;
  padding-right: 0.5em;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.6em;
  font-weight: 400;
  line-height: inherit;
  text-decoration: none !important;
  opacity: 0;
  transition: opacity 0.3s;
}
:is(h2, h3, h4):hover > .heading-anchor { opacity: 1; }
@media (max-width: 52rem) { .heading-anchor { display: none; } }

.prose strong { font-weight: 600; }

.prose :not(pre) > code {
  padding: 0.12em 0.38em;
  border: 1px solid var(--code-border);
  background: var(--code-bg);
  font-family: var(--font-mono);
  font-size: 0.84em;
  overflow-wrap: break-word;
}

/* Pull quotes */
.prose blockquote {
  margin-inline: 0;
  padding: 0.1em 0 0.1em 1.5em;
  border-left: 1px solid var(--text);
  font-family: var(--font-serif);
  font-size: clamp(1.4rem, 1.2rem + 0.8vw, 1.75rem);
  font-style: italic;
  line-height: 1.35;
}
.prose blockquote > :first-child { margin-top: 0; }
.prose blockquote > :last-child { margin-bottom: 0; }

.prose hr {
  height: auto;
  margin-block: 3.5em;
  border: 0;
  background: none;
  color: var(--text-muted);
  text-align: center;
}
.prose hr::after {
  content: "* * *";
  font-family: var(--font-serif);
  font-size: 1.25rem;
  letter-spacing: 0.6em;
}

.prose :is(ul, ol) { padding-left: 1.3em; }
.prose li + li { margin-top: 0.45em; }
.prose li > :is(ul, ol) { margin-top: 0.45em; }
.prose li::marker { color: var(--text-muted); font-family: var(--font-mono); font-size: 0.85em; }

.prose figure { margin-inline: 0; }
.prose figcaption {
  margin-top: 0.9rem;
  color: var(--text-muted);
  font: 500 0.6875rem/1.5 var(--font-mono);
  letter-spacing: 0.06em;
  text-align: left;
}

.table-wrap {
  overflow-x: auto;
  border-block: 1px solid var(--text);
}
.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9em;
  line-height: 1.5;
}
.prose :is(th, td) {
  padding: 0.8em 1em 0.8em 0;
  border-bottom: var(--hairline);
  text-align: left;
  vertical-align: top;
}
.prose th {
  color: var(--text-muted);
  font: 500 0.6875rem/1.4 var(--font-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  white-space: nowrap;
}
.prose tr:last-child td { border-bottom: 0; }

.prose .footnotes {
  margin-top: 4em;
  padding-top: 1.5em;
  border-top: var(--hairline);
  color: var(--text-muted);
  font-size: 0.875em;
}

/* ==========================================================================
   Callouts and banners
   ========================================================================== */

.banner,
.callout {
  --tone: var(--info);
  position: relative;
  border: 1px solid color-mix(in srgb, var(--tone) 32%, var(--border));
  background: color-mix(in srgb, var(--tone) 4%, var(--surface));
  font-size: 0.95em;
  line-height: 1.65;
}

.banner--new, .callout--important { --tone: var(--new); }
.banner--success, .callout--tip { --tone: var(--success); }
.banner--warning, .callout--warning { --tone: var(--warning); }
.banner--danger, .callout--caution { --tone: var(--danger); }

.callout { padding: 1.25rem 1.5rem 1.4rem; }
.callout > * { margin: 0; }
.callout > * + * { margin-top: 0.6em; }
.callout__title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.8em !important;
  padding-bottom: 0.8em;
  border-bottom: 1px solid color-mix(in srgb, var(--tone) 22%, transparent);
  color: var(--tone);
  font: 500 0.6875rem/1.2 var(--font-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.callout__title svg { width: 1rem; height: 1rem; flex: none; }

.banner {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 1rem;
  padding: 1.25rem 1.5rem;
}
.banner[hidden] { display: none; }
.banner__icon { padding-top: 0.2rem; color: var(--tone); }
.banner__icon .icon { width: 1.1rem; height: 1.1rem; }
.banner__body > * { margin: 0; }
.banner__body > * + * { margin-top: 0.4em; }
.banner__title {
  color: var(--tone);
  font: 500 0.6875rem/1.4 var(--font-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.banner__link { font: 500 0.6875rem/1 var(--font-mono); letter-spacing: 0.1em; text-transform: uppercase; }

.prose > .banner + .banner { margin-top: 0.75rem; }
.prose > .banner:last-of-type { margin-bottom: 2.5rem; }

/* ==========================================================================
   Code blocks (token colours live in syntax.css)
   ========================================================================== */

.prose div.highlighter-rouge,
.prose .diagram,
.prose .gallery,
.prose .callout { margin-block-start: 2em; }

.prose :is(div.highlighter-rouge, .diagram, .gallery, .callout) + * { margin-block-start: 2em; }

div.highlighter-rouge {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--code-border);
  background: var(--code-bg);
}

@media (min-width: 52rem) {
  .prose > div.highlighter-rouge,
  .prose > .diagram { margin-inline: -2rem; }
}

.code-block__bar {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: 2.75rem;
  padding: 0.35rem 0.4rem 0.35rem 1.25rem;
  border-bottom: 1px solid var(--code-border);
  color: var(--text-muted);
  font: 500 0.625rem/1 var(--font-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.code-block__copy {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 2rem;
  margin-left: auto;
  padding: 0 0.75rem;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-muted);
  font: inherit;
  letter-spacing: inherit;
  text-transform: inherit;
  cursor: pointer;
  transition: color 0.3s, border-color 0.3s;
}
.code-block__copy:hover { color: var(--text); border-color: var(--code-border); }
.code-block__copy svg { width: 0.85rem; height: 0.85rem; }

pre.highlight {
  margin: 0;
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  font: 400 0.84rem/1.75 var(--font-mono);
  tab-size: 4;
}
pre.highlight code { font: inherit; }

/* Fenced blocks Rouge doesn't highlight (e.g. Mermaid source if rendering fails) */
.prose > pre {
  margin-block-start: 2em;
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  border: 1px solid var(--code-border);
  background: var(--code-bg);
  font: 400 0.84rem/1.75 var(--font-mono);
}
.prose > pre code { font: inherit; }

/* ==========================================================================
   Mermaid diagrams
   ========================================================================== */

.js :is(div.language-mermaid, pre:has(> code.language-mermaid)):not(.mermaid-failed) { display: none; }

.diagram {
  margin-inline: 0;
  padding: clamp(1.25rem, 3vw, 2.5rem);
  overflow-x: auto;
  border: var(--hairline);
  background: var(--surface);
  text-align: center;
}
.diagram svg { display: inline-block; max-width: 100%; height: auto; }

.mermaid-failed::before {
  content: "Diagram failed to render, so here is the source.";
  display: block;
  padding: 0.7rem 1.25rem;
  border-bottom: 1px solid var(--code-border);
  color: var(--text-muted);
  font: 500 0.6875rem/1.4 var(--font-mono);
}

/* ==========================================================================
   Gallery
   ========================================================================== */

.gallery .swiper { overflow: hidden; }
.gallery img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}
.gallery .carousel-controls { margin-top: 1rem; }

/* ==========================================================================
   Post layout + table of contents
   ========================================================================== */

.post-layout {
  width: 100%;
  max-width: calc(var(--prose) + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.post-layout__toc:empty { display: none; }

.toc {
  margin-bottom: 2.5rem;
  border-block: var(--hairline);
  font-size: 0.875rem;
}
.toc__summary {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 0;
  color: var(--text-muted);
  font: 500 0.6875rem/1 var(--font-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  list-style: none;
  cursor: pointer;
}
.toc__summary::-webkit-details-marker { display: none; }
.toc__summary::after {
  content: "+";
  font-size: 1rem;
  transition: transform 0.4s var(--ease-out);
}
.toc[open] .toc__summary::after { transform: rotate(45deg); }
.toc__count { margin-left: auto; letter-spacing: 0.06em; text-transform: none; }
.toc__list { margin: 0; padding: 0 0 1rem; list-style: none; counter-reset: toc; }
.toc__item--h2 { counter-increment: toc; }
.toc__item a {
  display: flex;
  gap: 0.9rem;
  padding: 0.45rem 0;
  color: var(--text-muted);
  line-height: 1.4;
  text-decoration: none;
  transition: color 0.3s;
}
.toc__item--h2 a::before {
  content: counter(toc, decimal-leading-zero);
  flex: none;
  width: 1.4rem;
  font: 500 0.6875rem/1.9 var(--font-mono);
}
.toc__item--h3 a { padding-left: 2.3rem; font-size: 0.8125rem; }
.toc__item a:hover { color: var(--text); }
.toc__item a[aria-current] { color: var(--text); }
.toc__item a[aria-current]::before { color: var(--accent); }

@media (min-width: 80rem) {
  .post-layout.has-toc {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, var(--prose)) minmax(0, 1fr);
    column-gap: 4rem;
    max-width: calc(var(--container) + 2 * var(--gutter));
  }
  .post-layout.has-toc > .prose { grid-column: 2; grid-row: 1; }
  .post-layout.has-toc > .post-layout__toc { grid-column: 3; grid-row: 1; }
  .toc {
    position: sticky;
    top: calc(var(--header-h) + 2rem);
    max-width: 15rem;
    margin: 0;
    border-bottom: 0;
  }
  .toc__summary { white-space: nowrap; pointer-events: none; }
  .toc__summary::after, .toc__count { display: none; }
  /* A rail that marks the section being read */
  .toc__item a { position: relative; }
  .toc__item a[aria-current]::after {
    content: "";
    position: absolute;
    top: 50%;
    right: calc(100% + 0.75rem);
    width: 1.5rem;
    height: 1px;
    background: var(--accent);
  }
}

/* ==========================================================================
   Subscribe CTA, related posts, post navigation
   ========================================================================== */

.cta { margin-top: 6rem; }

.cta__inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.75rem;
  padding: clamp(1.75rem, 4vw, 3rem);
  overflow: hidden;
  border: var(--hairline);
  background:
    radial-gradient(120% 140% at 100% 0%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 55%),
    var(--surface);
}
.cta__icon {
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid color-mix(in srgb, var(--accent) 45%, var(--border));
  color: var(--accent);
}
.cta__icon .icon { width: 1.1rem; height: 1.1rem; }
.cta__title {
  margin: 0;
  font: 400 clamp(2rem, 1.5rem + 2vw, 3rem)/1 var(--font-serif);
  letter-spacing: -0.015em;
}
.cta__text { margin: 0.75rem 0 0; color: var(--text-muted); font-size: 0.9375rem; line-height: 1.6; }
.cta__actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }
@media (min-width: 44rem) {
  .cta__inner { grid-template-columns: auto minmax(0, 1fr); align-items: start; column-gap: 1.75rem; }
  .cta__actions { grid-column: 2; }
}

.related { margin-top: 6rem; }

.post-nav {
  display: grid;
  gap: 1px;
  margin-top: 4rem;
  border: var(--hairline);
  background: var(--border);
}
@media (min-width: 40rem) {
  .post-nav { grid-template-columns: 1fr 1fr; }
  .post-nav__link--next { grid-column: 2; text-align: right; }
  .post-nav:not(:has(.post-nav__link + .post-nav__link)) { background: transparent; border: 0; }
  .post-nav:not(:has(.post-nav__link + .post-nav__link)) .post-nav__link { border: var(--hairline); }
}

.post-nav__link {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.5rem 1.75rem;
  background: var(--surface);
  color: var(--text);
  text-decoration: none;
  transition: background-color 0.4s;
}
.post-nav__link:hover { background: color-mix(in srgb, var(--surface) 70%, var(--bg)); }
.post-nav__label {
  color: var(--text-muted);
  font: 500 0.6875rem/1 var(--font-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.post-nav__title { font: 400 1.6rem/1.1 var(--font-serif); }

/* ==========================================================================
   Archive + tags
   ========================================================================== */

.archive-year + .archive-year { margin-top: 5rem; }
.archive-year:focus { outline: none; }

.archive-year__title {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin: 0 0 1.25rem;
  font: 400 clamp(2.5rem, 2rem + 2vw, 3.75rem)/1 var(--font-serif);
  letter-spacing: -0.02em;
  scroll-margin-top: calc(var(--header-h) + 1rem);
}
.tag-section:target .archive-year__title { color: var(--accent); }

.archive-list {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--text);
  list-style: none;
}

.archive-item {
  display: grid;
  grid-template-columns: 6rem minmax(0, 1fr) auto 1.5rem;
  align-items: baseline;
  gap: 0.4rem 1.5rem;
  padding: 1.35rem 0;
  border-bottom: var(--hairline);
  color: var(--text);
  text-decoration: none;
}
.archive-item::after {
  content: "→";
  color: var(--text-muted);
  text-align: right;
  opacity: 0;
  transform: translateX(-8px);
  transition: opacity 0.4s, transform 0.5s var(--ease-out);
}
.archive-item:hover::after { color: var(--accent); opacity: 1; transform: none; }
.archive-item__date {
  color: var(--text-muted);
  font: 500 0.6875rem/1.4 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-variant-numeric: tabular-nums;
}
.archive-item__title {
  font: 400 1.6rem/1.15 var(--font-serif);
  letter-spacing: -0.01em;
  transition: color 0.3s;
}
.archive-item:hover .archive-item__title { color: var(--accent); }
.archive-item .badges { justify-self: end; }
.tag-section .archive-item { grid-template-columns: 8rem minmax(0, 1fr) auto 1.5rem; }
@media (max-width: 40rem) {
  .archive-item, .tag-section .archive-item { grid-template-columns: minmax(0, 1fr); }
  .archive-item::after, .archive-item .badges { display: none; }
}

/* ==========================================================================
   Toasts
   ========================================================================== */

.toasts {
  position: fixed;
  inset: auto 1.25rem 5.25rem auto;
  z-index: 90;
  width: min(25rem, calc(100vw - 2.5rem));
  pointer-events: none;
}
@media (max-width: 40rem) {
  .toasts { left: 1rem; right: 4.75rem; bottom: 1rem; width: auto; }
}

.toasts__list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.toast {
  --tone: var(--info);
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: 0.9rem;
  padding: 1rem 0.6rem 1.1rem 1.1rem;
  overflow: hidden;
  border: var(--hairline);
  background: var(--surface);
  box-shadow: var(--elevation);
  pointer-events: auto;
  animation: toast-in 0.6s var(--ease-out);
}
.toast--new { --tone: var(--new); }
.toast--success { --tone: var(--success); }
.toast--warning { --tone: var(--warning); }
.toast--danger { --tone: var(--danger); }

.toast__icon { display: grid; padding-top: 0.15rem; color: var(--tone); }
.toast__icon svg { width: 1rem; height: 1rem; }
.toast__body { min-width: 0; }
.toast__title {
  margin: 0 0 0.35rem;
  color: var(--tone);
  font: 500 0.6875rem/1.4 var(--font-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.toast__message { margin: 0; font-size: 0.9rem; line-height: 1.5; }
.toast__action {
  display: inline-block;
  margin-top: 0.75rem;
  padding: 0;
  border: 0;
  background: none;
  color: var(--text);
  font: 500 0.6875rem/1 var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: underline;
  text-decoration-color: var(--tone);
  text-underline-offset: 0.35em;
  cursor: pointer;
}
.toast__close {
  width: 1.9rem;
  height: 1.9rem;
  border-color: transparent;
  color: var(--text-muted);
}
.toast__close:hover { border-color: var(--border); }
.toast__close svg { width: 0.85rem; height: 0.85rem; }
.toast__timer {
  position: absolute;
  inset: auto 0 0;
  height: 1px;
  background: var(--tone);
  transform-origin: 0 50%;
  animation: toast-timer linear forwards;
}
.toast.is-paused .toast__timer { animation-play-state: paused; }
.toast.is-leaving { animation: toast-out 0.35s var(--ease-in-out) forwards; }

@keyframes toast-in {
  from { opacity: 0; transform: translateY(20px); }
}
@keyframes toast-out {
  to { opacity: 0; transform: translateX(30px); }
}
@keyframes toast-timer {
  from { transform: scaleX(1); }
  to { transform: scaleX(0); }
}

/* ==========================================================================
   Search dialog
   ========================================================================== */

html.search-open { overflow: hidden; }

.search {
  width: min(44rem, calc(100vw - 2rem));
  max-width: none;
  max-height: min(40rem, calc(100dvh - 4rem));
  margin: 12vh auto auto;
  padding: 0;
  overflow: hidden;
  border: var(--hairline);
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--elevation);
}
.search[open] {
  display: flex;
  flex-direction: column;
  animation: dialog-in 0.5s var(--ease-out);
}
.search::backdrop { background: color-mix(in srgb, var(--bg) 70%, transparent); }
@keyframes dialog-in {
  from { opacity: 0; transform: translateY(-12px); }
}

.search__form {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1rem 0.75rem 1.5rem;
  border-bottom: var(--hairline);
  transition: border-color 0.3s;
}
.search__form:focus-within { border-bottom-color: var(--text); }
.search__label { display: grid; color: var(--text-muted); }
.search__label .icon { width: 1.1rem; height: 1.1rem; }
.search__input {
  flex: 1;
  min-width: 0;
  padding: 0.6rem 0;
  border: 0;
  background: transparent;
  color: var(--text);
  font: 400 1.75rem/1.2 var(--font-serif);
  outline: none;
}
.search__input::placeholder { color: var(--text-muted); font-style: italic; }
.search__input::-webkit-search-cancel-button { display: none; }
.search__esc { padding: 0; border: 0; background: none; cursor: pointer; }

.search__results {
  flex: 1;
  margin: 0;
  padding: 0;
  overflow-y: auto;
  list-style: none;
}
.search__results:empty { display: none; }
.search__result + .search__result { border-top: var(--hairline); }
.search__result a {
  position: relative;
  display: grid;
  gap: 0.4rem;
  padding: 1.1rem 1.5rem;
  color: var(--text);
  text-decoration: none;
  transition: background-color 0.2s;
}
.search__result[aria-selected="true"] a { background: color-mix(in srgb, var(--accent) 6%, var(--surface)); }
.search__result[aria-selected="true"] a::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 2px;
  background: var(--accent);
}
.search__result-title { font: 400 1.35rem/1.2 var(--font-serif); }
.search__result-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-muted);
  font: 500 0.625rem/1.4 var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.search__result-snippet {
  display: -webkit-box;
  overflow: hidden;
  color: var(--text-muted);
  font-size: 0.875rem;
  line-height: 1.55;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}
.search mark {
  padding: 0 0.1em;
  background: color-mix(in srgb, var(--accent) 18%, transparent);
  color: inherit;
}
.search__status {
  margin: 0;
  padding: 0.75rem 1.5rem;
  border-top: var(--hairline);
  color: var(--text-muted);
  font: 500 0.625rem/1.4 var(--font-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.search__status:empty { display: none; }
.search__hint {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin: 0;
  padding: 0.75rem 1.5rem;
  border-top: var(--hairline);
  color: var(--text-muted);
  font: 500 0.625rem/1 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
@media (hover: none) { .search__hint { display: none; } }

/* ==========================================================================
   Back to top
   ========================================================================== */

.back-to-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 80;
  display: grid;
  place-items: center;
  width: 3rem;
  height: 3rem;
  padding: 0;
  border: var(--hairline);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.4s, transform 0.5s var(--ease-out), visibility 0.4s, border-color 0.3s;
}
.back-to-top[hidden] { display: none; }
.back-to-top.is-visible { opacity: 1; visibility: visible; transform: none; }
.back-to-top:hover { border-color: var(--text); }
.back-to-top .icon { width: 1rem; height: 1rem; }
.back-to-top__ring {
  position: absolute;
  inset: -1px;
  width: calc(100% + 2px);
  height: calc(100% + 2px);
  overflow: visible;
  fill: none;
  stroke: var(--accent);
  stroke-width: 2;
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  pointer-events: none;
}
@media (max-width: 40rem) {
  .back-to-top { right: 1rem; bottom: 1rem; }
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  position: relative;
  padding-block: 8rem 2rem;
  background: linear-gradient(to bottom, var(--bg), transparent 10rem);
}

.site-footer__inner { display: grid; gap: 4rem; }

.site-footer__sign {
  max-width: 16ch;
  margin: 0;
  font: 400 clamp(3rem, 1.8rem + 6vw, 7.5rem)/0.95 var(--font-serif);
  letter-spacing: -0.025em;
}

.site-footer__grid {
  display: grid;
  gap: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--text);
}
@media (min-width: 48rem) {
  .site-footer__grid { grid-template-columns: 1fr 1fr 2fr; }
}

.footer-col__title {
  margin: 0 0 1.1rem;
  padding: 0;
  color: var(--text-muted);
  font-size: 0.625rem;
  line-height: 1;
  letter-spacing: 0.16em;
}

.footer-links {
  display: grid;
  gap: 0.6rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.footer-links a {
  color: var(--text);
  font-size: 0.9375rem;
  text-decoration: none;
  background: linear-gradient(currentColor, currentColor) 0 100% / 0 1px no-repeat;
  transition: background-size 0.5s var(--ease-out);
}
.footer-links a:hover { background-size: 100% 1px; }

.site-footer__base {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 2rem;
  padding-top: 1.5rem;
  border-top: var(--hairline);
}
.site-footer__copy {
  margin: 0;
  color: var(--text-muted);
  font: 500 0.625rem/1.6 var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* Backdrop picker: a segmented control */
.backdrop-picker {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}
html:not(.js) .backdrop-picker, .backdrop-picker[hidden] { display: none; }
.backdrop-picker legend { float: left; width: 100%; }
.backdrop-picker__options {
  clear: both;
  display: flex;
  flex-wrap: wrap;
  gap: 1px;
  border: var(--hairline);
  background: var(--border);
  width: fit-content;
  max-width: 100%;
}
.backdrop-picker__option {
  position: relative;
  display: inline-flex;
  flex: 1 0 auto;
  align-items: center;
  gap: 0.6rem;
  min-height: 2.75rem;
  padding: 0 1rem 0 0.75rem;
  background: var(--bg);
  color: var(--text-muted);
  font: 500 0.6875rem/1 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color 0.3s, background-color 0.3s;
}
.backdrop-picker__option[hidden] { display: none; }
.backdrop-picker__option:hover { color: var(--text); }
.backdrop-picker__option input {
  position: absolute;
  inset: 0;
  margin: 0;
  opacity: 0;
  cursor: pointer;
}
.backdrop-picker__option:has(input:checked) { background: var(--text); color: var(--bg); }
.backdrop-picker__option:has(input:focus-visible) { outline: 1px solid var(--focus); outline-offset: 2px; z-index: 1; }
.backdrop-picker__swatch {
  width: 0.9rem;
  height: 0.9rem;
  border: 1px solid color-mix(in srgb, currentColor 30%, transparent);
}
.backdrop-picker__swatch--aurora { background: linear-gradient(170deg, var(--fx-2) 20%, var(--fx-4) 55%, var(--fx-line)); }
.backdrop-picker__swatch--topo { background: repeating-radial-gradient(circle at 30% 30%, var(--fx-1) 0 2px, var(--fx-line) 2px 3px); }
.backdrop-picker__swatch--nebula { background: conic-gradient(var(--fx-3), var(--fx-2), var(--fx-4), var(--fx-line), var(--fx-3)); }
.backdrop-picker__swatch--halftone { background: radial-gradient(circle, var(--fx-line) 35%, transparent 38%) 0 0 / 4px 4px, var(--fx-1); }
.backdrop-picker__swatch--off { background: linear-gradient(135deg, var(--fx-1) 45%, currentColor 45% 55%, var(--fx-1) 55%); }

/* ==========================================================================
   Page transitions (cross-document View Transitions, where supported)
   ========================================================================== */

@media (prefers-reduced-motion: no-preference) {
  @view-transition { navigation: auto; }
  ::view-transition-old(root),
  ::view-transition-new(root) { animation-duration: 0.35s; }
}

/* ==========================================================================
   Accessibility preferences
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
  .site-header { transition: none; }
}

@media (forced-colors: active) {
  .backdrop, .backdrop-fallback, .hero::after, body::after { display: none; }
  .card, .icon-button, .carousel-btn, .badge, .banner, .callout, .toast, .search-trigger,
  .button, .chip-button, .back-to-top, .backdrop-picker__option { border: 1px solid CanvasText; }
  .button::before { display: none; }
  .hero__title em, .hero__title .word:last-child .word__inner { color: CanvasText; }
}

@media print {
  .backdrop, .backdrop-fallback, .site-header, .site-footer, .progress,
  .code-block__copy, .carousel-controls, .skip-link, .announcements, .toasts, .back-to-top,
  .search, .toc, .cta, .related, .share, .scroll-cue, .hero__actions { display: none !important; }
  body::after { display: none; }
  .hero { padding-block: 0 1rem; min-height: 0; }
  .hero::after { display: none; }
}