/* ============================================================
 * DineshBlog v8 — minimalist sharp modern dynamic
 * Inspired by paulgraham.com, every.to, vercel.com/blog, macwright.com
 * Target: ~16-20KB. Self-hosted Inter + Fraunces. Slate accent.
 * ============================================================ */

/* ---------- Design tokens ---------- */
:root {
  /* Colors — light */
  --bg:        #fafafa;
  --surface:   #ffffff;
  --text:      #0a0a0a;
  --text-2:    #525252;
  --text-3:    #737373;
  --border:    rgba(0,0,0,0.08);
  --border-strong: rgba(0,0,0,0.16);
  --accent:    #1e293b;
  --accent-2:  #334155;
  --accent-soft: rgba(30,41,59,0.06);
  --code-bg:   #f4f4f5;
  --quote-bg:  #f5f5f4;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 8px 24px -12px rgba(0,0,0,0.12);
  --nav-bg:    rgba(250,250,250,0.82);

  /* Type */
  --font-sans:  'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-serif: 'Fraunces', 'Crimson Pro', 'Iowan Old Style', Georgia, serif;
  --font-mono:  ui-monospace, 'SF Mono', 'Menlo', 'Consolas', monospace;

  /* Sizing */
  --container: 1100px;
  --reading: 65ch;
  --r-sm: 6px;
  --r-md: 8px;
  --r-lg: 12px;
  --r-pill: 9999px;

  /* Motion */
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
  --t-fast: 160ms;
  --t-base: 220ms;
}

[data-theme="dark"] {
  --bg:        #0a0a0a;
  --surface:   #111114;
  --text:      #e5e5e5;
  --text-2:    #a3a3a3;
  --text-3:    #6b6b6b;
  --border:    rgba(255,255,255,0.08);
  --border-strong: rgba(255,255,255,0.18);
  --accent:    #cbd5e1;
  --accent-2:  #e2e8f0;
  --accent-soft: rgba(203,213,225,0.08);
  --code-bg:   #18181b;
  --quote-bg:  #161618;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.4);
  --shadow-md: 0 8px 24px -8px rgba(0,0,0,0.6);
  --nav-bg:    rgba(10,10,10,0.78);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: 'kern', 'liga', 'calt', 'ss01';
  min-height: 100vh;
  transition: background var(--t-base) var(--ease), color var(--t-base) var(--ease);
}
img, svg, video { max-width: 100%; display: block; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
input, textarea, select { font: inherit; color: inherit; }
ul, ol { list-style: none; }
a { color: inherit; text-decoration: none; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 3px; }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--accent); color: var(--bg);
  padding: .5rem 1rem; z-index: 9999; border-radius: var(--r-md);
}
.skip-link:focus { left: 1rem; top: 1rem; }

/* ---------- Layout primitives ---------- */
.container { max-width: var(--container); margin: 0 auto; padding: 0 1.5rem; }
.container-narrow { max-width: 720px; margin: 0 auto; padding: 0 1.5rem; }
.section { padding: 6rem 0; }
.section-tight { padding: 4rem 0; }

/* Page enter fade */
.page-enter { opacity: 0; transform: translateY(12px); }
.page-enter.in { opacity: 1; transform: none; transition: opacity 400ms var(--ease), transform 400ms var(--ease); }

/* ---------- Navbar ---------- */
.navbar {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--t-base), background var(--t-base);
  padding-top: env(safe-area-inset-top, 0);
}
.navbar.scrolled { border-bottom-color: var(--border); }
.nav-inner {
  max-width: var(--container); margin: 0 auto;
  padding: 0 1.5rem; height: 60px;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.brand {
  font-weight: 700; letter-spacing: -0.02em; font-size: 0.95rem;
  color: var(--text);
}
.brand b { font-weight: 700; color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 1.5rem; }
.nav-link {
  font-size: 0.875rem; color: var(--text-2);
  transition: color var(--t-fast);
  position: relative;
}
.nav-link:hover { color: var(--text); }
.nav-link.active { color: var(--text); }
.nav-actions { display: flex; align-items: center; gap: 0.25rem; }
.icon-btn {
  width: 36px; height: 36px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: var(--r-md);
  color: var(--text-2);
  transition: background var(--t-fast), color var(--t-fast);
}
.icon-btn:hover { background: var(--accent-soft); color: var(--text); }
.icon-btn .kbd { display: none; }
.theme-icon-dark { display: none; }
[data-theme="dark"] .theme-icon-light { display: none; }
[data-theme="dark"] .theme-icon-dark { display: inline-flex; }
.nav-burger {
  width: 36px; height: 36px; border-radius: var(--r-md);
  display: none; flex-direction: column; align-items: center; justify-content: center;
  gap: 4px;
}
.nav-burger span {
  width: 18px; height: 1.5px; background: var(--text);
  transition: transform var(--t-fast), opacity var(--t-fast);
}

@media (max-width: 820px) {
  .nav-burger { display: inline-flex; }
  .nav-links {
    position: fixed; inset: calc(60px + env(safe-area-inset-top, 0)) 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--bg); border-bottom: 1px solid var(--border);
    padding: 0.5rem 1.5rem;
    transform: translateY(-110%);
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
    transition: transform var(--t-base) var(--ease), opacity .2s ease, visibility 0s linear .25s;
  }
  .nav-links.open {
    transform: none;
    visibility: visible;
    opacity: 1;
    pointer-events: auto;
    transition: transform var(--t-base) var(--ease), opacity .2s ease;
  }
  .nav-link { padding: 0.875rem 0; border-bottom: 1px solid var(--border); font-size: 1rem; }
  .nav-link:last-child { border-bottom: none; }
}

/* Reading progress thin line */
.reading-progress {
  position: fixed; top: 0; left: 0; height: 2px; width: 0;
  background: var(--accent); z-index: 200;
  transition: width 80ms linear;
}

/* Main offset for fixed nav */
.main-default, .main-post { padding-top: calc(88px + env(safe-area-inset-top, 0)); min-height: calc(100vh - 60px); }
.page-header { padding-top: 1.5rem; }

/* mermaid diagrams: designed container with subtle gradient + soft shadow */
.mermaid, pre.mermaid {
  position: relative;
  background: linear-gradient(180deg, var(--surface) 0%, var(--bg) 100%);
  border: 1px solid var(--border);
  border-radius: var(--r-lg, 14px);
  padding: 1.5rem 1.25rem 1.25rem;
  margin: 2rem 0;
  overflow-x: auto;
  text-align: center;
  box-shadow: 0 1px 2px rgba(0,0,0,0.04), 0 8px 24px -12px rgba(0,0,0,0.10);
  font-family: inherit;
  white-space: pre-wrap;
}
/* Hide raw mermaid source until JS renders it (anti-FOUC) */
.mermaid[data-pending], pre.mermaid[data-pending] { color: transparent; min-height: 80px; }
.mermaid[data-pending]::after, pre.mermaid[data-pending]::after {
  content: "rendering diagram…";
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  color: var(--muted, #94a3b8);
  font-size: 0.8rem; letter-spacing: 0.04em;
}
.mermaid:not([data-pending])::after, pre.mermaid:not([data-pending])::after { content: none; }
.mermaid::before, pre.mermaid::before {
  content: "diagram";
  position: absolute;
  top: 0.65rem; left: 0.85rem;
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted, #94a3b8);
  opacity: 0.7;
  font-weight: 600;
}
.mermaid svg, pre.mermaid svg { max-width: 100%; height: auto; display: inline-block; }
.mermaid .nodeLabel, .mermaid .edgeLabel, .mermaid .label { font-family: inherit !important; }
@media (max-width: 640px) {
  .mermaid, pre.mermaid { padding: 2rem 0.75rem 0.85rem; margin: 1.5rem -0.5rem; border-radius: 10px; }
}

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 500; letter-spacing: -0.022em;
  line-height: 1.2; color: var(--text);
}
.display {
  font-size: clamp(2.4rem, 5.2vw, 3.8rem);
  letter-spacing: -0.03em; line-height: 1.05;
  font-weight: 500;
}
h2 { font-size: clamp(1.6rem, 3vw, 2.05rem); line-height: 1.25; }
h3 { font-family: var(--font-sans); font-size: 1.2rem; font-weight: 600; letter-spacing: -0.01em; }
h4 { font-family: var(--font-sans); font-size: 1rem; font-weight: 600; }

p { margin-bottom: 1.25em; }
a { color: var(--text); text-decoration: underline; text-decoration-color: var(--border-strong); text-underline-offset: 3px; transition: text-decoration-color var(--t-fast); }
a:hover { text-decoration-color: var(--accent); }
small, .small { font-size: 0.875rem; color: var(--text-2); }
.muted { color: var(--text-2); }
.muted-2 { color: var(--text-3); }
.eyebrow {
  font-family: var(--font-sans);
  font-size: 0.75rem; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--text-3); font-weight: 500;
}
hr { border: none; height: 1px; background: var(--border); margin: 4rem 0; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  padding: 0.625rem 1.125rem;
  font-family: var(--font-sans); font-size: 0.9375rem; font-weight: 500;
  border-radius: var(--r-md);
  border: 1px solid transparent;
  text-decoration: none; cursor: pointer; white-space: nowrap;
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast), transform var(--t-fast);
}
.btn:hover { text-decoration: none; }
.btn.primary {
  background: var(--accent); color: var(--bg);
  border-color: var(--accent);
}
.btn.primary:hover { background: var(--accent-2); border-color: var(--accent-2); }
.btn.ghost {
  background: transparent; color: var(--text);
  border-color: var(--border-strong);
}
.btn.ghost:hover { background: var(--accent-soft); border-color: var(--accent); }
.btn.sm { padding: 0.4rem 0.8rem; font-size: 0.825rem; }

/* ---------- Cards ---------- */
.card {
  display: block;
  padding: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  transition: transform var(--t-base) var(--ease), border-color var(--t-base), box-shadow var(--t-base);
  text-decoration: none;
  color: inherit;
}
.card:hover {
  transform: translateY(-2px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
  text-decoration: none;
}

/* ---------- Hero (home) ---------- */
.hero {
  padding: 7rem 0 5rem;
}
.hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.6rem, 6vw, 4.4rem);
  letter-spacing: -0.035em; line-height: 1.02;
  font-weight: 500; margin-bottom: 1.25rem;
}
.hero h1 .word { display: inline-block; opacity: 0; transform: translateY(8px); }
.hero h1 .word.in { opacity: 1; transform: none; transition: opacity 500ms var(--ease), transform 500ms var(--ease); }
.hero .lede {
  font-size: 1.1875rem; line-height: 1.6;
  color: var(--text-2); max-width: 36rem;
}
.hero-meta { margin-top: 1.5rem; display: flex; gap: 0.75rem; flex-wrap: wrap; }

/* ---------- Recent essays grid (home) ---------- */
.essays-list {
  display: grid; grid-template-columns: 1fr; gap: 0;
  border-top: 1px solid var(--border);
}
.essay-row {
  display: grid; grid-template-columns: 8rem 1fr auto; gap: 1.5rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
  align-items: baseline;
  text-decoration: none; color: inherit;
  transition: background var(--t-fast);
}
.essay-row:hover { text-decoration: none; }
.essay-row:hover .essay-title { color: var(--accent); }
.essay-date {
  font-family: var(--font-mono); font-size: 0.8125rem; color: var(--text-3);
  letter-spacing: -0.01em; white-space: nowrap;
}
.essay-title {
  font-family: var(--font-serif); font-size: 1.375rem; font-weight: 500;
  letter-spacing: -0.015em; line-height: 1.3;
  transition: color var(--t-fast);
}
.essay-meta {
  font-size: 0.8125rem; color: var(--text-3); white-space: nowrap;
}
@media (max-width: 720px) {
  .essay-row {
    grid-template-columns: 1fr; gap: 0.5rem; padding: 1.25rem 0;
  }
  .essay-date { order: -1; font-size: 0.75rem; }
  .essay-title { font-size: 1.1875rem; }
  .essay-meta { font-size: 0.75rem; }
}

/* ---------- Section heading ---------- */
.section-head {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 1rem; margin-bottom: 2rem;
}
.section-head h2 { font-size: 1.4rem; }
.section-head .more {
  font-size: 0.875rem; color: var(--text-2);
}
.section-head .more:hover { color: var(--accent); }

/* ---------- Post page ---------- */
.post-header {
  padding: 5rem 0 3rem;
  border-bottom: 1px solid var(--border);
}
.post-header-inner { max-width: 760px; margin: 0 auto; padding: 0 1.5rem; }
.post-meta {
  display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: center;
  font-family: var(--font-sans); font-size: 0.8125rem;
  color: var(--text-3); margin-bottom: 1.5rem;
}
.post-meta .dot { color: var(--text-3); opacity: 0.5; }
.post-meta a { color: var(--text-2); text-decoration: none; }
.post-meta a:hover { color: var(--accent); }
.post-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 500; letter-spacing: -0.03em;
  line-height: 1.08; color: var(--text);
  margin-bottom: 1.25rem;
}
.post-subheading {
  font-family: var(--font-serif); font-style: italic;
  font-size: clamp(1.125rem, 2.2vw, 1.375rem);
  line-height: 1.5; color: var(--text-2);
  font-weight: 400; margin-bottom: 1.5rem;
}
.post-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1rem; }
.tag-pill {
  font-family: var(--font-sans);
  font-size: 0.75rem; padding: 0.25rem 0.625rem;
  border: 1px solid var(--border); border-radius: var(--r-pill);
  color: var(--text-2); text-decoration: none;
  transition: border-color var(--t-fast), color var(--t-fast);
}
.tag-pill:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }
.status-pill {
  font-family: var(--font-sans); font-size: 0.7rem; letter-spacing: 0.06em;
  text-transform: uppercase; padding: 0.2rem 0.5rem;
  border-radius: var(--r-sm);
  background: var(--accent-soft); color: var(--accent);
}
.status-pill.wip { background: rgba(217,119,6,0.12); color: #b45309; }
[data-theme="dark"] .status-pill.wip { background: rgba(252,211,77,0.12); color: #fcd34d; }

.series-banner {
  display: inline-flex; align-items: baseline; gap: 0.5rem;
  margin-top: 1.25rem;
  padding: 0.625rem 1rem;
  background: var(--accent-soft); border-left: 2px solid var(--accent);
  border-radius: var(--r-sm);
  font-size: 0.875rem; color: var(--text);
  text-decoration: none;
}
.series-eyebrow { font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-3); }
.series-count { color: var(--text-3); }

/* Post layout: sidebar TOC + body */
.post-layout {
  display: grid; grid-template-columns: 1fr;
  gap: 3rem; padding: 3rem 0;
}
.post-body { max-width: 720px; margin: 0 auto; padding: 0 1.5rem; width: 100%; }
.post-toc { display: none; }

@media (min-width: 1180px) {
  .post-layout {
    grid-template-columns: 1fr 720px 1fr;
    max-width: 1400px; margin: 0 auto; padding: 3rem 1.5rem;
    gap: 2rem;
  }
  .post-body { padding: 0; max-width: 720px; }
  .post-toc {
    display: block;
    grid-column: 3;
    position: sticky; top: 84px; align-self: start;
    max-height: calc(100vh - 100px); overflow-y: auto;
    padding-left: 1.5rem; border-left: 1px solid var(--border);
    font-size: 0.8125rem;
  }
  .toc-title {
    font-size: 0.7rem; letter-spacing: 0.12em;
    text-transform: uppercase; color: var(--text-3);
    margin-bottom: 0.75rem; font-weight: 500;
  }
  #toc-list li { margin-bottom: 0.45rem; }
  #toc-list li.lvl-3 { margin-left: 0.875rem; }
  #toc-list a {
    color: var(--text-2); text-decoration: none; line-height: 1.4;
    display: block; padding: 0.15rem 0;
    border-left: 1px solid transparent; padding-left: 0.5rem; margin-left: -0.5rem;
    transition: color var(--t-fast), border-color var(--t-fast);
  }
  #toc-list a:hover { color: var(--text); }
  #toc-list a.active { color: var(--accent); border-left-color: var(--accent); }
}

/* ---------- Prose ---------- */
.prose {
  font-family: var(--font-sans);
  font-size: 1.0625rem; line-height: 1.78;
  color: var(--text);
}
.prose > * + * { margin-top: 1.25rem; }
.prose h2 {
  font-family: var(--font-serif);
  font-size: 1.7rem; line-height: 1.3; font-weight: 500;
  letter-spacing: -0.02em;
  margin-top: 3rem; margin-bottom: 0.75rem;
  scroll-margin-top: 84px;
}
.prose h3 {
  font-family: var(--font-sans);
  font-size: 1.2rem; font-weight: 600;
  margin-top: 2.25rem; margin-bottom: 0.5rem;
  scroll-margin-top: 84px;
}
.prose h4 {
  font-family: var(--font-sans);
  font-size: 1.0625rem; font-weight: 600;
  margin-top: 1.75rem; margin-bottom: 0.25rem;
}
.prose p { margin-bottom: 1.25rem; }
.prose a {
  color: var(--text); text-decoration: underline;
  text-decoration-color: var(--accent); text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
.prose a:hover { text-decoration-thickness: 2px; }
.prose strong { font-weight: 600; color: var(--text); }
.prose em { font-style: italic; }

.prose ul, .prose ol { margin: 1.25rem 0 1.25rem 1.25rem; }
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li { margin-bottom: 0.4rem; padding-left: 0.25rem; }
.prose li::marker { color: var(--text-3); }

.prose blockquote {
  margin: 1.75rem 0;
  padding: 0.5rem 0 0.5rem 1.25rem;
  border-left: 2px solid var(--accent);
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.125rem; line-height: 1.6;
  color: var(--text-2);
}
.prose blockquote p { margin: 0; }
.prose blockquote p + p { margin-top: 0.75rem; }

.prose code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  padding: 0.125rem 0.375rem;
  background: var(--code-bg);
  border-radius: var(--r-sm);
  color: var(--text);
}
.prose pre {
  margin: 1.75rem 0;
  padding: 1.25rem 1.375rem;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  overflow-x: auto;
  font-size: 0.875rem; line-height: 1.6;
}
.prose pre code {
  padding: 0; background: none; border-radius: 0;
  font-size: inherit;
}

.prose img {
  margin: 1.75rem auto;
  border-radius: var(--r-md);
  border: 1px solid var(--border);
}

.prose hr { margin: 3rem 0; height: 1px; background: var(--border); border: 0; }

.prose table {
  width: 100%; border-collapse: collapse;
  margin: 1.75rem 0; font-size: 0.9375rem;
  border: 1px solid var(--border); border-radius: var(--r-md);
  overflow: hidden;
}
.prose th, .prose td {
  padding: 0.625rem 0.875rem; text-align: left;
  border-bottom: 1px solid var(--border);
}
.prose th { background: var(--code-bg); font-weight: 600; font-size: 0.8125rem; }
.prose tr:last-child td { border-bottom: none; }

/* Drop cap on first paragraph of post body */
.prose > p:first-of-type::first-letter {
  font-family: var(--font-serif);
  float: left;
  font-size: 3.4em;
  line-height: 0.85;
  font-weight: 500;
  padding: 0.1em 0.1em 0 0;
  color: var(--accent);
}

/* Footnotes */
.prose sup a, .prose .footnote-ref {
  font-size: 0.75em;
  text-decoration: none;
  color: var(--accent);
  padding: 0 0.1em;
}
.prose .footnote {
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.875rem;
  color: var(--text-2);
}
.footnote-popover {
  position: absolute;
  z-index: 50;
  max-width: min(360px, 90vw);
  padding: 0.875rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-md);
  font-size: 0.875rem;
  line-height: 1.55;
  color: var(--text);
}

/* Callout / TLDR */
.callout {
  margin: 1.75rem 0;
  padding: 1rem 1.25rem;
  background: var(--quote-bg);
  border-left: 2px solid var(--accent);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  font-size: 0.9375rem;
  color: var(--text);
}
.callout .callout-eyebrow {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.7rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--text-3);
  margin-bottom: 0.4rem; font-weight: 600;
}
.callout p { margin: 0; }
.callout.tldr { border-left-color: var(--accent); }

/* Pull quote */
.prose .pullquote {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.5rem; line-height: 1.4;
  text-align: center;
  margin: 2.5rem 0;
  padding: 1rem 0;
  color: var(--text);
}

.post-end {
  text-align: center; color: var(--text-3);
  margin: 4rem 0 1rem;
  letter-spacing: 0.6em;
  font-size: 0.875rem;
}

/* Series nav */
.series-nav {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1rem;
  margin: 3rem 0 2rem;
}
.series-nav-card {
  display: block; padding: 1rem 1.25rem;
  border: 1px solid var(--border); border-radius: var(--r-md);
  text-decoration: none; color: inherit;
  transition: border-color var(--t-fast);
}
.series-nav-card:hover { border-color: var(--accent); text-decoration: none; }
.series-nav-card.next { text-align: right; }
.series-nav-eyebrow {
  display: block; font-size: 0.7rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--text-3); margin-bottom: 0.25rem;
}
.series-nav-card strong { font-family: var(--font-serif); font-size: 1rem; font-weight: 500; line-height: 1.3; }
@media (max-width: 640px) {
  .series-nav { grid-template-columns: 1fr; }
  .series-nav-card.next { text-align: left; }
}

.post-footer-blocks { max-width: 760px; margin: 0 auto; padding-bottom: 4rem; }

/* Reactions */
.reactions {
  margin: 2.5rem 0;
  padding: 1.25rem 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  text-align: center;
}
.r-eyebrow {
  font-size: 0.7rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--text-3);
  margin-bottom: 0.875rem; font-weight: 500;
}
.r-buttons { display: inline-flex; gap: 0.625rem; }
.r-btn {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.45rem 0.875rem;
  border: 1px solid var(--border); border-radius: var(--r-pill);
  font-size: 0.8125rem; color: var(--text-2);
  transition: border-color var(--t-fast), background var(--t-fast), transform var(--t-fast);
}
.r-btn:hover { border-color: var(--accent); background: var(--accent-soft); }
.r-btn.active { border-color: var(--accent); background: var(--accent-soft); color: var(--text); }
.r-btn.bump { animation: bump 320ms var(--ease); }
@keyframes bump { 30% { transform: scale(1.18); } 100% { transform: scale(1); } }
.r-emoji { font-size: 1rem; }
.r-count { color: var(--text-3); font-variant-numeric: tabular-nums; min-width: 1ch; }
.r-meta { font-size: 0.7rem; color: var(--text-3); margin-top: 0.625rem; }

/* Subscribe */
.post-subscribe, .home-subscribe {
  margin: 3rem 0;
  padding: 2rem 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  text-align: center;
}
.post-subscribe h3, .home-subscribe h3 {
  font-family: var(--font-serif); font-weight: 500;
  font-size: 1.4rem; margin-bottom: 0.5rem; letter-spacing: -0.015em;
}
.post-subscribe p, .home-subscribe p { color: var(--text-2); font-size: 0.9375rem; margin-bottom: 1.25rem; }
.subscribe-form {
  display: flex; gap: 0.5rem; max-width: 26rem; margin: 0 auto;
}
.subscribe-form input {
  flex: 1; padding: 0.625rem 0.875rem;
  border: 1px solid var(--border-strong); border-radius: var(--r-md);
  background: var(--bg); color: var(--text); font-size: 0.9375rem;
  transition: border-color var(--t-fast);
}
.subscribe-form input:focus { outline: none; border-color: var(--accent); }
.subscribe-form button {
  padding: 0.625rem 1.125rem;
  background: var(--accent); color: var(--bg);
  border-radius: var(--r-md); font-size: 0.9375rem; font-weight: 500;
  transition: background var(--t-fast);
}
.subscribe-form button:hover { background: var(--accent-2); }
.subscribe-form .spinner {
  display: inline-block; width: 14px; height: 14px;
  border: 2px solid currentColor; border-right-color: transparent;
  border-radius: 50%; animation: spin 700ms linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.subscribe-msg {
  font-size: 0.875rem; color: var(--text-2); margin-top: 0.75rem;
  min-height: 1.2em;
}
.subscribe-msg.ok { color: var(--accent); }
.subscribe-msg.err { color: #dc2626; }
[data-theme="dark"] .subscribe-msg.err { color: #f87171; }

@media (max-width: 480px) {
  .subscribe-form { flex-direction: column; }
}

/* Related posts */
.related { margin: 3rem 0; }
.related-eyebrow {
  font-size: 0.7rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--text-3);
  margin-bottom: 1rem; font-weight: 500;
}
.related-list {
  display: flex; flex-direction: column;
  border-top: 1px solid var(--border);
}
.related-list a {
  display: flex; gap: 1rem; align-items: baseline;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
  text-decoration: none; color: inherit;
  font-size: 0.9375rem;
  transition: color var(--t-fast);
}
.related-list a:hover strong { color: var(--accent); }
.related-list .related-meta {
  font-family: var(--font-mono); font-size: 0.75rem;
  color: var(--text-3); white-space: nowrap; flex-shrink: 0;
}
.related-list strong {
  font-family: var(--font-serif); font-weight: 500;
  font-size: 1.0625rem; transition: color var(--t-fast);
}

/* Post bottom nav */
.post-bottom-nav {
  display: flex; gap: 0.75rem; flex-wrap: wrap;
  margin: 3rem 0 1rem;
  padding-top: 2rem; border-top: 1px solid var(--border);
}

/* ---------- Topics page ---------- */
.topics-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.5rem; margin-top: 2rem;
}
.topic-row {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: 0.625rem 0;
  border-bottom: 1px solid var(--border);
  text-decoration: none; color: inherit;
  font-size: 0.9375rem;
  transition: color var(--t-fast);
}
.topic-row:hover { color: var(--accent); }
.topic-row .count { color: var(--text-3); font-family: var(--font-mono); font-size: 0.8125rem; }

/* ---------- Archive ---------- */
.archive-year {
  margin-top: 3rem; margin-bottom: 1rem;
  font-family: var(--font-serif); font-size: 1.6rem;
  font-weight: 500; letter-spacing: -0.02em;
  color: var(--text);
  border-bottom: 1px solid var(--border); padding-bottom: 0.5rem;
}
.archive-list {
  display: grid; grid-template-columns: 1fr; gap: 0;
}
.archive-item {
  display: grid; grid-template-columns: 6.5rem 1fr auto; gap: 1rem;
  padding: 0.625rem 0;
  border-bottom: 1px solid var(--border);
  align-items: baseline;
  text-decoration: none; color: inherit;
  font-size: 0.9375rem;
  transition: color var(--t-fast);
}
.archive-item:hover .archive-title { color: var(--accent); }
.archive-date { font-family: var(--font-mono); font-size: 0.8125rem; color: var(--text-3); }
.archive-title { font-family: var(--font-serif); font-size: 1.0625rem; font-weight: 500; line-height: 1.3; }
.archive-meta { font-size: 0.75rem; color: var(--text-3); white-space: nowrap; }
@media (max-width: 640px) {
  .archive-item { grid-template-columns: 1fr; gap: 0.25rem; padding: 0.875rem 0; }
  .archive-date { order: -1; font-size: 0.7rem; }
}

/* ---------- About / Now / Uses ---------- */
.page-header { padding: 5rem 0 2rem; }
.page-header h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 4.5vw, 3.2rem);
  font-weight: 500; letter-spacing: -0.03em; line-height: 1.05;
  margin-bottom: 0.75rem;
}
.page-header .lede {
  font-family: var(--font-serif); font-style: italic;
  font-size: 1.25rem; color: var(--text-2); line-height: 1.5;
}
.page-content {
  max-width: var(--reading); margin: 0 auto; padding: 0 1.5rem;
  font-size: 1.0625rem; line-height: 1.78;
}
.page-content > * + * { margin-top: 1.25rem; }
.page-content h2 {
  font-family: var(--font-serif); font-size: 1.55rem; font-weight: 500;
  margin-top: 2.5rem; letter-spacing: -0.02em;
}
.page-content a {
  color: var(--text); text-decoration: underline;
  text-decoration-color: var(--accent); text-underline-offset: 3px;
}
.page-content ul, .page-content ol {
  margin: 1.25rem 0 1.25rem 1.25rem;
}
.page-content ul { list-style: disc; }
.page-content ol { list-style: decimal; }
.page-content li { margin-bottom: 0.4rem; }
.page-content blockquote {
  font-family: var(--font-serif); font-style: italic;
  border-left: 2px solid var(--accent);
  padding-left: 1.25rem;
  color: var(--text-2);
  margin: 1.5rem 0;
}

/* Uses grid */
.uses-grid {
  display: grid; grid-template-columns: 1fr; gap: 2rem;
  margin-top: 2.5rem;
}
@media (min-width: 720px) { .uses-grid { grid-template-columns: 1fr 1fr; gap: 2.5rem; } }
.uses-cat h3 {
  font-family: var(--font-sans); font-weight: 600; font-size: 0.875rem;
  letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-3);
  margin-bottom: 0.875rem; padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border);
}
.uses-cat ul { list-style: none; }
.uses-cat li {
  display: flex; justify-content: space-between; gap: 1rem;
  padding: 0.4rem 0;
  font-size: 0.9375rem;
}
.uses-cat li .what { color: var(--text); }
.uses-cat li .which { color: var(--text-2); text-align: right; }

/* Avatar (about) */
.avatar {
  width: 96px; height: 96px; border-radius: 50%;
  background: var(--accent); color: var(--bg);
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-serif); font-size: 2.4rem; font-weight: 500;
  margin-bottom: 1.5rem;
}

/* ---------- Search overlay ---------- */
.search-overlay {
  position: fixed; inset: 0; z-index: 300;
  display: flex; align-items: flex-start; justify-content: center;
  padding: 12vh 1rem 1rem;
}
.search-overlay[hidden] { display: none !important; }
.search-backdrop {
  position: absolute; inset: 0;
  background: rgba(10,10,10,0.45);
  backdrop-filter: blur(4px);
}
.search-panel {
  position: relative;
  width: 100%; max-width: 560px;
  background: var(--surface); border: 1px solid var(--border-strong);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}
.search-input-row {
  display: flex; align-items: center; gap: 0.625rem;
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--border);
}
.search-icon { color: var(--text-3); flex-shrink: 0; }
.search-input-row input {
  flex: 1; border: none; background: none; font-size: 0.9375rem;
  outline: none; padding: 0.25rem 0;
}
.search-esc {
  font-family: var(--font-mono); font-size: 0.7rem;
  padding: 0.15rem 0.4rem;
  background: var(--code-bg); color: var(--text-3);
  border-radius: var(--r-sm); border: 1px solid var(--border);
}
.search-results { max-height: 50vh; overflow-y: auto; padding: 0.375rem 0; }
.search-results li {
  padding: 0; margin: 0;
}
.search-results a {
  display: block; padding: 0.625rem 1rem;
  text-decoration: none; color: inherit;
  border-left: 2px solid transparent;
}
.search-results a:hover, .search-results a.active {
  background: var(--accent-soft); border-left-color: var(--accent);
}
.search-results .sr-title { font-size: 0.9375rem; font-weight: 500; color: var(--text); }
.search-results .sr-meta { font-size: 0.75rem; color: var(--text-3); margin-top: 0.15rem; }
.search-empty {
  padding: 2rem 1rem; text-align: center;
  color: var(--text-3); font-size: 0.875rem;
}
.search-footer {
  display: flex; gap: 1rem; justify-content: center;
  padding: 0.625rem 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.7rem; color: var(--text-3);
}
.search-footer kbd {
  font-family: var(--font-mono); padding: 0.1rem 0.35rem;
  background: var(--code-bg); border: 1px solid var(--border);
  border-radius: var(--r-sm); margin-right: 0.25rem;
}

/* ---------- Footer ---------- */
.site-footer {
  margin-top: 6rem;
  padding: 4rem 1.5rem 2rem;
  border-top: 1px solid var(--border);
  background: var(--bg);
}
.footer-inner {
  max-width: var(--container); margin: 0 auto;
  display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 2.5rem;
}
.footer-col h4 {
  font-family: var(--font-sans); font-size: 0.75rem;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--text-3); font-weight: 600;
  margin-bottom: 0.875rem;
}
.footer-col a {
  display: block; color: var(--text-2); text-decoration: none;
  font-size: 0.875rem; padding: 0.2rem 0;
  transition: color var(--t-fast);
}
.footer-col a:hover { color: var(--accent); }
.footer-brand p {
  color: var(--text-2); font-size: 0.875rem; line-height: 1.6;
  max-width: 28rem;
}
.footer-bottom {
  max-width: var(--container); margin: 3rem auto 0;
  padding-top: 1.5rem; border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  font-size: 0.75rem; color: var(--text-3);
}
@media (max-width: 720px) {
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .footer-brand { grid-column: span 2; }
}

/* ---------- 404 ---------- */
.lost {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  min-height: 60vh; padding: 4rem 1.5rem; text-align: center; gap: 1rem;
}
.lost h1 {
  font-family: var(--font-serif); font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 500; letter-spacing: -0.02em;
}
.lost p { color: var(--text-2); max-width: 26rem; }

/* ---------- Confirm ---------- */
.confirm-page {
  max-width: 36rem; margin: 0 auto; padding: 6rem 1.5rem;
  text-align: center;
}
.confirm-page h1 { font-family: var(--font-serif); font-size: 2rem; font-weight: 500; margin-bottom: 1rem; }

/* ---------- KaTeX / Mermaid (defensive) ---------- */
.katex-display { overflow-x: auto; padding: 0.5rem 0; }
.mermaid { background: var(--surface); padding: 1rem; border-radius: var(--r-md); margin: 1.5rem 0; text-align: center; }

/* ---------- Hide v7 chrome that can't be removed without template touch ---------- */
.rocket-top, .focustu-fab, .focustu-panel { display: none !important; }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .page-enter, .hero h1 .word { opacity: 1 !important; transform: none !important; }
}

/* ---------- Print ---------- */
@media print {
  .navbar, .site-footer, .reading-progress, .post-toc, .reactions,
  .post-subscribe, .related, .series-nav, .post-bottom-nav, .focustu-fab { display: none !important; }
  body { background: white; color: black; }
  .post-body { max-width: 100%; }
}