/* mock1 — dark geometric hacker blog theme */
/* marathon x mathematics x monospace */

/* ── custom display fonts ── */
@font-face {
  font-family: 'Barcola Expanded Bold';
  src: url('../fonts/barcola-expanded.bold.ttf') format('truetype');
  font-weight: bold;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Dark Nexis';
  src: url('../fonts/DarkNexis.ttf') format('truetype');
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg:        #090909;
  --surface:   #111111;
  --surface2:  #181818;
  --border:    #252525;
  --border2:   #333333;
  --text:      #ede9e0;
  --muted:     #6b6760;
  --faint:     #252220;
  --lime:      #c8ff00;
  --lime-dim:  #8baf00;
  --red:       #ff3b30;

  --font: 'JetBrains Mono', 'Courier New', monospace;

  --gap-xs:   4px;
  --gap-sm:   8px;
  --gap-md:   16px;
  --gap-lg:   32px;
  --gap-xl:   64px;
  --gap-2xl:  128px;
}

html {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.6;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  color-scheme: dark;
}

body {
  min-height: 100vh;
  position: relative;
  background-color: var(--bg);
}

/* ─── watermark background ─── */
.bg-watermark {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.bg-watermark svg {
  width: 100%;
  height: 100%;
  opacity: 0.028;
}

/* ─── progress bar ─── */
#read-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 100%;
  background: var(--lime);
  transform: scaleX(0);
  transform-origin: left;
  z-index: 1000;
  will-change: transform;
}

/* ─── scan-line overlay ─── */
.scan-lines {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9997;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,0.07) 2px,
    rgba(0,0,0,0.07) 4px
  );
}

/* ─── site nav ─── */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 40px;
  mix-blend-mode: normal;
  background: linear-gradient(to bottom, rgba(9,9,9,0.92) 0%, transparent 100%);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  transition: none;
}

@media (min-width: 769px) {
  .site-nav {
    transition: backdrop-filter 0.3s, -webkit-backdrop-filter 0.3s, background 0.3s;
  }

  .site-nav.scrolled {
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    background: rgba(9,9,9,0.85);
    border-bottom: 1px solid var(--border);
  }
}

.nav-logo {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text);
  text-decoration: none;
  position: relative;
}

.nav-logo::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--lime);
  transition: width 0.3s;
}

.nav-logo:hover::after { width: 100%; }

.nav-links {
  display: flex;
  gap: var(--gap-lg);
  list-style: none;
  align-items: center;
}

.nav-links a {
  font-size: 11px;
  font-weight: 300;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--text); }

/* ─── page wrapper ─── */
.page-wrap {
  position: relative;
  z-index: 1;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 40px;
}

/* ── HOME: hero ── */
.home-hero {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 190px 0 150px;
  min-height: auto;
  position: relative;
  overflow: visible;
}

.home-hero .hero-text {
  z-index: 2;
  text-align: center;
}

.hero-name-wrap {
  position: relative;
  display: inline-block;
}

.hero-name-solid {
  position: relative;
  z-index: 5;
  display: block;
  text-transform: uppercase;
  font-family: 'Dark Nexis', 'JetBrains Mono', monospace;
  font-size: clamp(72px, 9vw, 160px);
  font-weight: normal;
  letter-spacing: 0.04em;
  line-height: 0.9;
  color: var(--text);
  margin: 0;
}

.hero-name-echo {
  position: absolute;
  top: var(--ey, 0);
  left: var(--ex, 0);
  z-index: 2;
  display: block;
  text-transform: uppercase;
  font-family: 'Dark Nexis', 'JetBrains Mono', monospace;
  font-size: clamp(72px, 9vw, 160px);
  font-weight: normal;
  letter-spacing: 0.04em;
  line-height: 0.9;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--lime);
  opacity: var(--opacity, 0.5);
  mix-blend-mode: difference;
  pointer-events: none;
  user-select: none;
  white-space: nowrap;
  will-change: transform;
}

/* Firefox fallback: -webkit-text-stroke is unsupported, use text-shadow for outline */
@supports not (-webkit-text-stroke: 1.5px var(--lime)) {
  .hero-name-echo {
    -webkit-text-stroke: 0;
    text-shadow:
      -1.5px -1.5px 0 var(--lime),  1.5px -1.5px 0 var(--lime),
      -1.5px  1.5px 0 var(--lime),  1.5px  1.5px 0 var(--lime),
      -1.5px  0     0 var(--lime),  1.5px  0     0 var(--lime),
       0    -1.5px 0 var(--lime),  0     1.5px 0 var(--lime);
  }
}

.hero-geo {
  position: absolute;
  top: 10%;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  pointer-events: none;
  z-index: 0;
}

.hero-geo svg {
  width: 85vw;
  max-width: 1400px;
  height: auto;
  aspect-ratio: 700 / 450;
  opacity: 0.4;
  overflow: visible;
}

/* ── HOME: posts section ── */
.posts-section {
  padding-top: var(--gap-md);
  padding-bottom: 0;
  contain: layout style;
}

.posts-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: var(--gap-md) 0 var(--gap-sm);
  border-top: 1px solid var(--border);
}

.posts-header-label {
  font-size: 9px;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--muted);
}

.posts-header-count {
  font-size: 9px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ── HOME: post card ── */
.post-card {
  display: grid;
  grid-template-columns: 100px 1fr 80px;
  gap: 0 var(--gap-xl);
  padding: var(--gap-md) 0;
  border-bottom: 1px solid var(--border);
  position: relative;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  align-items: start;
  transition: border-color 0.25s;
}

.post-card::before {
  content: '';
  position: absolute;
  left: -40px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: transparent;
  transition: background 0.3s;
}

.post-card:hover::before,
.post-card:active::before { background: var(--lime); }
.post-card:hover .post-title,
.post-card:active .post-title { color: var(--lime); }
.post-card:hover,
.post-card:active { border-color: var(--border2); }

/* date column */
.post-date-col { padding-top: 2px; }

.post-date-year {
  font-size: 9px;
  color: var(--muted);
  letter-spacing: 0.2em;
  margin-bottom: 2px;
}

.post-date-day {
  font-size: 36px;
  font-weight: 100;
  line-height: 1;
  color: var(--border2);
  letter-spacing: -0.04em;
}

.post-date-mon {
  font-size: 9px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: 2px;
}

/* body column */
.post-body-col {}

.post-tags {
  display: flex;
  gap: var(--gap-sm);
  flex-wrap: wrap;
  margin-bottom: var(--gap-sm);
}

.tag {
  font-size: 9px;
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 3px 8px;
  border: 1px solid var(--border2);
  color: var(--muted);
  border-radius: 1px;
  transition: border-color 0.2s, color 0.2s;
  text-decoration: none;
}

.tag:hover { border-color: var(--lime-dim); color: var(--lime); }

.post-title {
  font-size: clamp(22px, 3vw, 42px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: var(--gap-sm);
  transition: color 0.3s;
}

.post-summary {
  font-size: 12px;
  font-weight: 300;
  line-height: 1.65;
  color: var(--muted);
  max-width: 600px;
}

/* stats column */
.post-stats-col {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--gap-md);
  padding-top: 2px;
  min-width: 80px;
}

.read-time {
  font-size: 9px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
}

.post-index {
  font-size: 48px;
  font-weight: 100;
  color: var(--faint);
  letter-spacing: -0.04em;
  line-height: 1;
}

/* last post card keeps its border */
.post-card:last-of-type { border-bottom: 1px solid var(--border); }

/* ── HOME: featured post ── */
.featured-post {
  display: block;
  padding: var(--gap-md) 0 var(--gap-lg);
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  color: inherit;
  position: relative;
}

.featured-post:hover .featured-title { color: var(--lime); }

.featured-eyebrow {
  display: flex;
  align-items: center;
  gap: var(--gap-lg);
  margin-bottom: var(--gap-sm);
  font-size: 9px;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--muted);
}

.featured-eyebrow::before {
  content: 'latest';
  border: 1px solid var(--lime);
  padding: 2px 8px;
  font-size: 8px;
  letter-spacing: 0.2em;
  color: var(--lime);
}

.featured-title {
  font-size: clamp(36px, 5vw, 72px);
  font-weight: 800;
  line-height: 0.92;
  letter-spacing: -0.04em;
  color: var(--text);
  margin-bottom: var(--gap-md);
  margin-right: -80px;
  transition: color 0.3s;
}

.featured-body {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: var(--gap-lg);
  align-items: start;
}

.featured-summary {
  font-size: 13px;
  font-weight: 300;
  line-height: 1.7;
  color: var(--muted);
}

.featured-aside {
  border-left: 1px solid var(--border);
  padding-left: var(--gap-xl);
}

.featured-meta-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: var(--gap-lg);
}

.featured-meta-label {
  font-size: 8px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--muted);
}

.featured-meta-val {
  font-size: 13px;
  font-weight: 400;
  color: var(--text);
}

/* ── HOME: tags cloud ── */
.tags-cloud {
  padding: 0 0 var(--gap-2xl);
}

.tags-cloud .posts-header { border-top: none; }

.tags-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-sm);
}

/* ── HOME: footer ── */
.home-footer, .single-footer { border-top: none; }

/* ─── ARTICLE: hero ─── */
.article-hero {
  min-height: 70vh;
  display: grid;
  grid-template-columns: 1fr;
  align-items: flex-end;
  padding-top: 120px;
  padding-bottom: var(--gap-2xl);
  position: relative;
  overflow: visible;
}

.article-hero-inner {
  position: relative;
  z-index: 2;
}

.article-geo-bg {
  position: absolute;
  top: -15%;
  right: -10%;
  width: 75%;
  height: 130%;
  pointer-events: none;
  z-index: 0;
}

.article-geo-bg svg {
  width: 100%;
  height: 100%;
  overflow: visible;
  will-change: transform;
  contain: layout style;
}

.article-meta-top {
  display: flex;
  align-items: center;
  gap: var(--gap-lg);
  margin-bottom: var(--gap-xl);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

.article-meta-top a {
  color: var(--muted);
  text-decoration: none;
}

.article-meta-top a:hover { color: var(--lime); }
.article-meta-top .sep { color: var(--border2); }

.article-title {
  font-size: clamp(48px, 8vw, 128px);
  font-weight: 800;
  line-height: 0.87;
  letter-spacing: -0.04em;
  color: var(--text);
  margin-bottom: var(--gap-xl);
  margin-left: -4px;
  overflow-wrap: break-word;
  word-break: break-word;
}

/* smaller title for very long titles */
.article-title.long-title {
  font-size: clamp(36px, 6vw, 88px);
}

.article-subtitle {
  font-size: 16px;
  font-weight: 300;
  line-height: 1.6;
  color: var(--muted);
  max-width: 560px;
  margin-bottom: var(--gap-xl);
}

.article-meta-bottom {
  display: flex;
  align-items: center;
  gap: var(--gap-xl);
  padding-top: var(--gap-lg);
  border-top: 1px solid var(--border);
}

.meta-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.meta-label {
  font-size: 9px;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--muted);
}

.meta-value {
  font-size: 13px;
  font-weight: 400;
  color: var(--text);
}

/* ─── ARTICLE: layout ─── */
.article-layout {
  display: grid;
  grid-template-columns: 220px 1fr 180px;
  gap: 0 var(--gap-2xl);
  align-items: start;
  padding-bottom: var(--gap-2xl);
}

/* ─── ARTICLE: TOC ─── */
.article-toc {
  position: sticky;
  top: 100px;
  padding-top: var(--gap-xl);
}

.toc-label {
  font-size: 10px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: var(--gap-lg);
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--gap-md);
  border-left: 1px solid var(--border);
  padding-left: var(--gap-md);
}

.toc-list a {
  font-size: 12px;
  font-weight: 300;
  color: var(--muted);
  text-decoration: none;
  display: block;
  line-height: 1.4;
  transition: color 0.2s;
}

.toc-list a:hover,
.toc-list a.active {
  color: var(--lime);
}

/* nested TOC — visual hierarchy via line + indent */
.toc-list ul {
  list-style: none;
  margin-top: var(--gap-sm);
  padding-left: var(--gap-md);
  display: flex;
  flex-direction: column;
  gap: var(--gap-xs);
  border-left: 1px solid var(--border);
}

.toc-list ul a {
  font-size: 11px;
}

/* ─── ARTICLE: content ─── */
.article-content {
  padding-top: var(--gap-xl);
  max-width: 680px;
}

.article-content h2 {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text);
  margin: var(--gap-2xl) 0 var(--gap-lg);
  line-height: 1.1;
  position: relative;
}

.article-content h2::before {
  content: '//';
  color: var(--lime);
  font-weight: 300;
  font-size: 14px;
  margin-right: var(--gap-sm);
  letter-spacing: 0;
}

.article-content h3 {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  margin: var(--gap-xl) 0 var(--gap-md);
}

.article-content p {
  font-size: 16px;
  font-weight: 300;
  line-height: 1.75;
  color: #b8b3a8;
  margin-bottom: var(--gap-lg);
}

.article-content strong {
  color: var(--text);
  font-weight: 700;
}

.article-content a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid var(--lime-dim);
  transition: border-color 0.2s;
}

.article-content a:hover { border-color: var(--lime); }

.article-content code {
  font-family: var(--font);
  font-size: 12px;
  color: var(--text);
  background: var(--surface2);
  padding: 2px 6px;
  border-radius: 2px;
}

.article-content pre code {
  background: transparent;
  padding: 0;
  border-radius: 0;
}

.article-content pre,
.article-content .highlight pre {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: var(--gap-lg) var(--gap-xl);
  overflow-x: auto;
  margin: 0;
  font-size: 12px;
  line-height: 1.6;
  color: var(--text);
  border-radius: 2px;
}

.article-content .highlight {
  margin: var(--gap-xl) 0;
  position: relative;
}

/* copy button on code blocks */
.copy-btn {
  position: absolute;
  top: 8px;
  right: 12px;
  z-index: 2;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--muted);
  font-family: var(--font);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 10px;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.2s;
  border-radius: 2px;
}

.article-content .highlight:hover .copy-btn,
.article-content pre:hover + .copy-btn,
.copy-btn.copied {
  opacity: 1;
}

.copy-btn:hover {
  border-color: var(--border2);
  color: var(--text);
}

.copy-btn.copied {
  color: var(--lime);
  border-color: var(--lime-dim);
}

/* ─── chroma syntax highlighting ─── */
.chroma .c { color: #5a5550; font-style: italic; } /* comment */
.chroma .cm { color: #5a5550; font-style: italic; } /* comment.multiline */
.chroma .cp { color: #8baf00; } /* comment.preproc */
.chroma .c1 { color: #5a5550; font-style: italic; } /* comment.single */
.chroma .cs { color: #5a5550; font-style: italic; } /* comment.special */
.chroma .k { color: #c8ff00; } /* keyword */
.chroma .kc { color: #c8ff00; } /* keyword.constant */
.chroma .kd { color: #c8ff00; } /* keyword.declaration */
.chroma .kn { color: #c8ff00; } /* keyword.namespace */
.chroma .kp { color: #c8ff00; } /* keyword.pseudo */
.chroma .kr { color: #c8ff00; } /* keyword.reserved */
.chroma .kt { color: #c8ff00; } /* keyword.type */
.chroma .n { color: #ede9e0; } /* name */
.chroma .na { color: #ede9e0; } /* name.attribute */
.chroma .nb { color: #8baf00; } /* name.builtin */
.chroma .nc { color: #ede9e0; } /* name.class */
.chroma .nf { color: #ede9e0; } /* name.function */
.chroma .s { color: #8baf00; } /* string */
.chroma .s1 { color: #8baf00; } /* string.single */
.chroma .s2 { color: #8baf00; } /* string.double */
.chroma .se { color: #8baf00; } /* string.escape */
.chroma .m { color: #c8ff00; } /* number */
.chroma .mi { color: #c8ff00; } /* number.integer */
.chroma .mf { color: #c8ff00; } /* number.float */
.chroma .o { color: var(--muted); } /* operator */
.chroma .p { color: var(--muted); } /* punctuation */
.chroma .l { color: #ede9e0; } /* literal */

.article-content blockquote {
  border-left: 2px solid var(--lime);
  padding: var(--gap-md) var(--gap-xl);
  margin: var(--gap-xl) 0;
  color: var(--muted);
  font-size: 18px;
  font-weight: 100;
  font-style: italic;
  line-height: 1.5;
}

.article-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: var(--gap-2xl) 0;
  position: relative;
}

.article-content hr::before {
  content: '* * *';
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 10px;
  letter-spacing: 0.5em;
  color: var(--muted);
  background: var(--bg);
  padding: 0 var(--gap-md);
}

/* drop cap */
.article-content p:first-of-type::first-letter {
  float: left;
  font-size: 72px;
  font-weight: 800;
  line-height: 0.75;
  margin-right: 8px;
  margin-top: 8px;
  color: var(--lime);
}

/* math display */
.math-display {
  display: block;
  padding: var(--gap-xl) var(--gap-2xl);
  margin: var(--gap-xl) 0;
  border: 1px solid var(--border);
  border-left: 3px solid var(--lime);
  font-size: 18px;
  font-weight: 100;
  letter-spacing: -0.01em;
  color: var(--text);
  line-height: 1.4;
  background: var(--surface);
  overflow-x: auto;
  font-family: var(--font);
}

/* article figure */
.article-figure {
  margin: var(--gap-2xl) -80px var(--gap-2xl) 0;
  position: relative;
}

.article-figure svg {
  width: 100%;
  height: 240px;
}

.figure-caption {
  font-size: 10px;
  letter-spacing: 0.15em;
  color: var(--muted);
  margin-top: var(--gap-md);
  text-transform: uppercase;
}

/* side number — vertical text */
.side-number {
  position: absolute;
  left: -120px;
  top: 50%;
  transform: translateY(-50%) rotate(-90deg);
  font-size: 10px;
  font-weight: 300;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}

/* title geo lines behind title */
.title-geo-lines {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: -1;
}

/* pull quote */
.pull-quote {
  position: relative;
  margin: var(--gap-2xl) -120px var(--gap-2xl) 0;
  padding: var(--gap-xl) var(--gap-2xl) var(--gap-xl) var(--gap-xl);
  border-top: 1px solid var(--border2);
  border-bottom: 1px solid var(--border2);
}

.pull-quote p {
  font-size: 28px;
  font-weight: 100;
  line-height: 1.3;
  color: var(--text);
  letter-spacing: -0.02em;
  margin: 0;
}

.pull-quote p::before {
  content: '"';
  color: var(--lime);
  font-size: 60px;
  font-weight: 800;
  line-height: 0;
  vertical-align: -0.35em;
  margin-right: 4px;
}

.pull-quote-attr {
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: var(--gap-md);
}

/* article end */
.article-end {
  display: flex;
  align-items: center;
  gap: var(--gap-xl);
  padding: var(--gap-2xl) 0;
  border-top: 1px solid var(--border);
}

.article-end-num {
  font-size: 120px;
  font-weight: 800;
  line-height: 1;
  color: var(--faint);
  letter-spacing: -0.06em;
}

.article-end-text {
  font-size: 12px;
  font-weight: 300;
  color: var(--muted);
  line-height: 1.6;
  max-width: 240px;
}

.article-end-text strong {
  color: var(--text);
  display: block;
  font-size: 14px;
  margin-bottom: var(--gap-sm);
}

/* ─── ARTICLE: sidebar ─── */
.article-sidebar {
  position: sticky;
  top: 100px;
  padding-top: var(--gap-xl);
}

.sidebar-section {
  margin-bottom: var(--gap-xl);
  padding-bottom: var(--gap-xl);
  border-bottom: 1px solid var(--border);
}

.sidebar-label {
  font-size: 10px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: var(--gap-md);
}

.sidebar-tags { display: flex; flex-wrap: wrap; gap: var(--gap-xs); }

.sidebar-stat {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: var(--gap-sm);
  font-size: 12px;
}

.sidebar-stat .s-label { color: var(--muted); font-weight: 300; }
.sidebar-stat .s-val { color: var(--text); font-size: 18px; font-weight: 100; }

.share-links {
  display: flex;
  flex-direction: column;
  gap: var(--gap-sm);
}

.share-link {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--gap-sm);
  transition: color 0.2s;
  padding: var(--gap-sm) 0;
  border-bottom: 1px solid var(--border);
}

.share-link:hover { color: var(--text); }

.share-link::before {
  content: '';
  display: inline-block;
  width: 16px;
  height: 1px;
  background: currentColor;
  flex-shrink: 0;
}

/* ─── ARTICLE: related posts ─── */
.related-section {
  padding: var(--gap-2xl) 0;
  border-top: 1px solid var(--border);
}

.section-label {
  font-size: 9px;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: var(--gap-xl);
  display: flex;
  align-items: center;
  gap: var(--gap-md);
}

.section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap-xl);
  margin-top: var(--gap-xl);
  contain: layout style;
}

.related-card {
  border: 1px solid var(--border);
  padding: var(--gap-xl);
  text-decoration: none;
  color: inherit;
  display: block;
  position: relative;
  overflow: hidden;
  transition: border-color 0.3s;
  content-visibility: auto;
  contain-intrinsic-size: auto 140px;
  contain: layout style;
}

.related-card:hover { border-color: var(--border2); }
.related-card:hover .related-title { color: var(--lime); }

.related-card::after {
  content: '\2192';
  position: absolute;
  bottom: var(--gap-lg);
  right: var(--gap-xl);
  font-size: 18px;
  font-weight: 100;
  color: var(--border2);
  transition: color 0.3s, right 0.3s;
}

.related-card:hover::after {
  color: var(--lime);
  right: var(--gap-md);
}

.related-date {
  font-size: 9px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: var(--gap-md);
}

.related-title {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--text);
  transition: color 0.3s;
}

/* ─── FOOTER ─── */
.site-footer {
  padding: var(--gap-2xl) 0 var(--gap-xl);
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--gap-xl);
  position: relative;
}

.footer-brand {
  font-size: 64px;
  font-weight: 800;
  line-height: 0.9;
  letter-spacing: -0.04em;
  color: var(--faint);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--gap-md);
}

.footer-links a {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-links a:hover { color: var(--text); }

.footer-copy {
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 0.1em;
  line-height: 1.8;
  text-align: right;
}

/* ─── SIDEBAR GEO ─── */
#sidebar-geo {
  will-change: transform;
  contain: layout style;
}

/* ─── CORNER GEO ─── */
.corner-geo {
  position: fixed;
  bottom: -40px;
  left: -40px;
  width: 280px;
  height: 280px;
  pointer-events: none;
  z-index: 0;
  opacity: 0.04;
  will-change: transform;
  contain: layout style;
}

/* ─── scroll hint ─── */
.scroll-hint {
  position: absolute;
  bottom: var(--gap-xl);
  left: 0;
  display: flex;
  align-items: center;
  gap: var(--gap-md);
  font-size: 9px;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--muted);
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

.scroll-hint::after {
  content: '';
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--lime), transparent);
  display: inline-block;
}

/* ─── selection ─── */
::selection {
  background: var(--lime);
  color: var(--bg);
}

/* ─── scrollbar ─── */
::-webkit-scrollbar { width: 3px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border2); }
::-webkit-scrollbar-thumb:hover { background: var(--lime-dim); }

/* Firefox scrollbar */
html {
  scrollbar-width: thin;
  scrollbar-color: var(--border2) var(--bg);
}

/* ─── TAXONOMY / SECTION LIST PAGES ─── */
.list-section {
  padding-top: 160px;
  padding-bottom: var(--gap-2xl);
  min-height: 100vh;
}

.list-section .section-label {
  margin-bottom: var(--gap-lg);
}

.list-grid {
  display: grid;
  gap: 0;
}

.taxonomy-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-md);
  padding: var(--gap-xl) 0;
}

.taxonomy-cloud .tag {
  font-size: 14px;
  padding: 6px 14px;
}

/* ─── MOBILE RESPONSIVE ─── */

@media screen and (max-width: 768px) {
  :root {
    --gap-xl: 24px;
    --gap-2xl: 48px;
  }

  html {
    font-size: 13px;
    overflow-x: visible;
    scroll-behavior: auto;
    overscroll-behavior-y: none;
  }

  body {
    overscroll-behavior-y: none;
  }

  .page-wrap {
    padding: 0 16px;
    overflow-x: visible;
  }

  /* nav */
  .site-nav {
    position: relative;
    padding: 0 16px;
    height: 40px;
    background: var(--bg);
  }

  .nav-logo {
    font-size: 15px;
  }

  .nav-links a {
    font-size: 10px;
  }

  /* home hero */
  .home-hero {
    padding: 100px 0 60px;
    min-height: auto;
    overflow: visible;
  }

  .hero-name-wrap {
    overflow: visible;
  }

  .hero-name-solid {
    font-size: clamp(32px, 10vw, 64px);
    line-height: 1.15;
  }

  .hero-name-echo {
    font-size: clamp(32px, 10vw, 64px);
    line-height: 1.15;
    -webkit-text-stroke: 1px var(--lime);
    white-space: normal;
  }

  .hero-geo svg {
    width: 95vw;
    opacity: 0.25;
  }

  /* post cards */
  .post-card {
    grid-template-columns: 1fr;
    gap: 6px;
    padding: 20px 0;
  }

  .post-card::before {
    left: -16px;
  }

  .post-date-col {
    display: flex;
    align-items: baseline;
    gap: 8px;
  }

  .post-date-year {
    font-size: 9px;
    margin-bottom: 0;
  }

  .post-date-day {
    font-size: 24px;
  }

  .post-date-mon {
    font-size: 9px;
    margin-top: 0;
  }

  .post-stats-col {
    display: none;
  }

  .post-title {
    font-size: clamp(18px, 5vw, 28px);
    overflow-wrap: break-word;
  }

  /* featured post */
  .featured-title {
    font-size: clamp(24px, 6vw, 48px);
    margin-right: 0;
    line-height: 1.15;
    overflow-wrap: anywhere;
  }

  .featured-body {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .featured-aside {
    border-left: none;
    border-top: 1px solid var(--border);
    padding-left: 0;
    padding-top: 16px;
  }

  .featured-eyebrow {
    gap: var(--gap-sm);
    flex-wrap: wrap;
  }

  /* article hero */
  .article-hero {
    min-height: auto;
    padding-top: 90px;
    padding-bottom: 48px;
    display: block;
    overflow: visible;
  }

  .article-geo-bg {
    display: none;
  }

  .article-subtitle {
    font-size: 14px;
    max-width: 100%;
  }

  .article-title {
    font-size: clamp(22px, 5vw, 34px);
    margin-left: 0;
    margin-bottom: 20px;
    line-height: 1.25;
    overflow-wrap: anywhere;
    word-break: break-word;
  }

  .article-meta-bottom {
    flex-wrap: wrap;
    gap: 16px;
  }

  .article-meta-bottom .meta-item:last-child {
    margin-left: 0;
  }

  .article-meta-top {
    flex-wrap: wrap;
    gap: 8px;
  }

  /* article layout */
  .article-layout {
    grid-template-columns: 1fr;
    gap: 0;
  }

  /* TOC */
  .article-toc {
    position: static;
    padding-top: 0;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 24px;
  }

  .toc-list {
    border-left: none;
    padding-left: 0;
  }

  .toc-list a {
    font-size: 13px;
  }

  .toc-list ul {
    border-left: 1px solid var(--border);
    padding-left: 12px;
  }

  .toc-list ul a {
    font-size: 12px;
  }

  .article-toc div[style*="margin-top:48px"] {
    display: none;
  }

  /* article content */
  .article-content {
    padding-top: 0;
    max-width: 100%;
  }

  .article-content h2 {
    font-size: 22px;
    margin: 48px 0 16px;
  }

  .article-content h2::before {
    font-size: 12px;
  }

  .article-content h3 {
    font-size: 15px;
  }

  .article-content p {
    font-size: 14px;
  }

  .article-content pre,
  .article-content .highlight pre {
    padding: 12px;
    font-size: 11px;
    max-width: calc(100vw - 32px);
  }

  .article-content .highlight {
    max-width: calc(100vw - 32px);
  }

  .article-content blockquote {
    padding: 12px 16px;
    font-size: 15px;
  }

  .math-display {
    padding: 16px;
    font-size: 15px;
    max-width: calc(100vw - 32px);
  }

  .article-content p:first-of-type::first-letter {
    font-size: 48px;
    margin-top: 4px;
    margin-right: 6px;
  }

  .article-content img {
    max-width: 100%;
    height: auto;
  }

  .article-figure {
    margin: var(--gap-2xl) 0;
  }

  .pull-quote {
    margin: var(--gap-2xl) 0;
    padding: var(--gap-xl) 0;
  }

  .side-number {
    display: none;
  }

  .article-end-num {
    font-size: 64px;
  }

  /* article sidebar */
  .article-sidebar {
    position: static;
    padding-top: 32px;
    margin-top: 48px;
    border-top: 1px solid var(--border);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }

  .sidebar-section {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
  }

  .sidebar-section:last-child {
    display: none;
  }

  /* related */
  .related-grid {
    grid-template-columns: 1fr;
  }

  /* footer */
  .site-footer {
    grid-template-columns: 1fr;
    gap: 24px;
    text-align: center;
  }

  .footer-copy {
    text-align: center;
  }

  .footer-brand {
    font-size: 36px;
  }

  /* corner geo */
  .corner-geo {
    display: none;
  }

  /* scroll hint */
  .scroll-hint {
    display: none;
  }

  /* copy button always visible on mobile */
  .copy-btn {
    opacity: 1;
    font-size: 9px;
    padding: 3px 8px;
  }

  /* tags cloud */
  .taxonomy-cloud .tag {
    font-size: 11px;
    padding: 4px 10px;
  }

  /* list pages */
  .list-section {
    padding-top: 120px;
  }
}

@media screen and (max-width: 480px) {
  html {
    font-size: 13px;
  }

  .site-nav {
    position: relative;
    height: 36px;
    padding: 0 12px;
    background: var(--bg);
  }

  .nav-logo {
    font-size: 14px;
    line-height: 36px;
  }

  .nav-links a {
    font-size: 9px;
  }

  .home-hero {
    padding: 80px 0 50px;
    overflow: visible;
  }

  .hero-name-solid {
    font-size: clamp(28px, 9vw, 48px);
    line-height: 1.15;
  }

  .hero-name-echo {
    font-size: clamp(28px, 9vw, 48px);
    line-height: 1.15;
  }

  .post-title {
    font-size: clamp(16px, 5vw, 24px);
  }

  .article-title {
    font-size: clamp(20px, 5vw, 30px);
    margin-bottom: 20px;
    line-height: 1.25;
    overflow-wrap: anywhere;
    word-break: break-word;
  }

  .article-content h2 {
    font-size: 20px;
  }

  .article-content h3 {
    font-size: 14px;
  }

  .article-sidebar {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .related-card {
    padding: 16px;
  }

  .related-title {
    font-size: 14px;
  }

  .site-nav {
    height: 36px;
    padding: 0 12px;
  }
}

/* hide scanlines on mobile (performance) */
@media screen and (max-width: 768px) {
  .scan-lines {
    display: none;
  }

  .bg-watermark {
    opacity: 0.5;
  }
}
.page-404 {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  text-align: center;
  gap: var(--gap-xl);
}

.page-404-num {
  font-size: clamp(80px, 15vw, 200px);
  font-weight: 800;
  color: var(--faint);
  line-height: 1;
  letter-spacing: -0.04em;
}

.page-404-text {
  font-size: 16px;
  color: var(--muted);
  font-weight: 300;
}

.page-404 a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid var(--lime-dim);
  font-size: 13px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.page-404 a:hover { border-color: var(--lime); }