/* =========================================================================
   Sharp Edges — Machined Datasheet
   Light cool-gray stock, disassembler-navy ink, chamfer + corner-tick motif.
   Zero radius, hairline rules, no glow. Type carries the personality.
   ========================================================================= */

:root {
  --font-display: "Space Grotesk", ui-sans-serif, system-ui, sans-serif;
  --font-body: "Hanken Grotesk", ui-sans-serif, system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --paper: #ecede8;      /* base stock */
  --paper-2: #e4e5df;    /* recessed (footer, insets) */
  --card: #f4f4f0;       /* raised surface */
  --card-2: #ecede7;     /* subtle inner fill */

  --ink: #191b17;        /* headings / strong */
  --ink-2: #3a3e38;      /* body copy */
  --ink-3: #6b7065;      /* muted meta */
  --ink-4: #969a8f;      /* faint */

  --line: #cbccc2;       /* hairline */
  --line-2: #d7d8cf;     /* softer hairline */

  --navy: #213c7a;       /* accent — disassembler blue */
  --navy-2: #16294f;     /* deeper (hover/text) */
  --navy-wash: #e0e3ea;  /* pale accent fill */
  --on-navy: #f4f4f0;

  --chamfer: 7px;
  --tick: 10px;
  --header-h: 64px;
  --aside-w: 264px;

  --ease: cubic-bezier(.2, .6, .2, 1);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink-2);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  overflow-x: hidden;
  overflow-wrap: break-word;
}

::selection { background: var(--navy); color: var(--on-navy); }

::-webkit-scrollbar { width: 12px; height: 12px; }
::-webkit-scrollbar-track { background: var(--paper-2); }
::-webkit-scrollbar-thumb { background: var(--line); border: 3px solid var(--paper-2); }
::-webkit-scrollbar-thumb:hover { background: var(--ink-4); }

a { color: var(--navy); text-decoration: none; transition: color .15s var(--ease); }
a:hover { color: var(--navy-2); }

/* utility: chamfered (cut) corner — only on filled elements, so no border breaks */
.cut { clip-path: polygon(0 0, calc(100% - var(--chamfer)) 0, 100% var(--chamfer), 100% 100%, 0 100%); }

/* =========================================================================
   Masthead (top header)
   ========================================================================= */
.masthead {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}
.masthead-inner {
  max-width: 1160px;
  margin: 0 auto;
  min-height: var(--header-h);
  padding: 0 2rem;
  display: flex;
  align-items: center;
  gap: 1.4rem;
}

.brand { display: flex; align-items: center; gap: .7rem; color: var(--ink); flex: none; }
.brand:hover { color: var(--ink); }
.brand-mark { width: 26px; height: 26px; flex: none; }
.brand-mark .bm-body { fill: var(--navy); }
.brand-mark .bm-cut { fill: none; stroke: var(--paper); stroke-width: 1.4; }
.brand-text { display: flex; flex-direction: column; line-height: 1; }
.brand-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -.01em;
}
.brand-sub {
  font-family: var(--font-mono);
  font-size: .58rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-top: .32rem;
}

.nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: .35rem;
}
.nav-link {
  font-family: var(--font-mono);
  font-size: .76rem;
  font-weight: 500;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding: .5rem .7rem;
  position: relative;
  transition: color .15s var(--ease);
}
.nav-link:hover { color: var(--ink); }
.nav-link.active { color: var(--navy); }
.nav-link.active::after {
  content: "";
  position: absolute;
  left: .7rem;
  right: .7rem;
  bottom: .1rem;
  height: 2px;
  background: var(--navy);
}

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 40px;
  height: 36px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}
.nav-toggle svg { width: 20px; height: 20px; }

/* search */
.search { position: relative; margin-left: .6rem; }
.search input {
  width: 168px;
  background: var(--card);
  border: 1px solid var(--line);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: .74rem;
  padding: .42rem 2.1rem .42rem .7rem;
  transition: border-color .15s var(--ease), width .2s var(--ease);
}
.search input::placeholder { color: var(--ink-4); }
.search input:focus { outline: none; border-color: var(--navy); }
.search button {
  position: absolute;
  right: 0; top: 0; bottom: 0;
  width: 2rem;
  border: 0;
  background: transparent;
  color: var(--ink-3);
  cursor: pointer;
  display: grid;
  place-items: center;
}
.search button:hover { color: var(--navy); }
.search button svg { width: 15px; height: 15px; }

.backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(25, 27, 23, .38);
  z-index: 45;
}

/* =========================================================================
   Shell + page grid
   ========================================================================= */
.shell {
  max-width: 1160px;
  margin: 0 auto;
  padding: 3rem 2rem 3.5rem;
}
.page-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--aside-w);
  gap: 3rem;
  align-items: start;
}
.page-main { min-width: 0; }
.page-aside {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  position: sticky;
  top: calc(var(--header-h) + 1.6rem);
}

/* =========================================================================
   Aside widgets (datasheet index panels)
   ========================================================================= */
.widget { }
.widget-title {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0 0 1rem;
  padding-bottom: .55rem;
  border-bottom: 1px solid var(--line);
}
.widget-title svg { width: 14px; height: 14px; color: var(--navy); }
.widget-empty { color: var(--ink-3); font-family: var(--font-mono); font-size: .76rem; margin: 0; }
.widget-more {
  display: inline-block;
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .04em;
  color: var(--navy);
}
.widget-more:hover { color: var(--navy-2); }

.recent-list { list-style: none; margin: 0; padding: 0; }
.recent-item {
  padding: .7rem 0;
  border-bottom: 1px solid var(--line-2);
}
.recent-item:last-child { border-bottom: 0; padding-bottom: 0; }
.recent-link {
  display: block;
  color: var(--ink-2);
  font-weight: 500;
  font-size: .92rem;
  line-height: 1.4;
  transition: color .15s var(--ease);
}
.recent-link:hover { color: var(--navy); }
.recent-date {
  display: block;
  margin-top: .3rem;
  font-family: var(--font-mono);
  font-size: .66rem;
  color: var(--ink-4);
}

.widget .tag-cloud { gap: .4rem; }
.widget .tag-pill { font-size: .74rem; padding: .28rem .55rem; }
.tag-pill.friend-pill { align-items: center; }
.friend-pill svg { width: .9em; height: .9em; color: var(--ink-3); flex: none; }
.friend-pill:hover svg { color: var(--navy); }

/* table of contents */
.toc { display: flex; flex-direction: column; gap: .1rem; }
.toc a {
  display: block;
  padding: .3rem .6rem;
  border-left: 2px solid var(--line);
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: .76rem;
  line-height: 1.4;
  transition: color .15s var(--ease), border-color .15s var(--ease), background .15s var(--ease);
}
.toc a:hover { color: var(--ink); background: var(--card); }
.toc a.active { color: var(--navy); border-left-color: var(--navy); background: var(--card); }
.toc a.lvl-3 { padding-left: 1.4rem; font-size: .72rem; }

/* =========================================================================
   Page heading (hero) — framed by corner registration ticks
   ========================================================================= */
.page-head {
  position: relative;
  margin: 0 0 2.4rem;
  padding: 1.5rem 0 1.6rem;
}
.page-head::before,
.page-head::after {
  content: "";
  position: absolute;
  width: var(--tick);
  height: var(--tick);
  border: solid var(--navy);
  border-width: 0;
}
.page-head::before { top: 0; left: 0; border-top-width: 2px; border-left-width: 2px; }
.page-head::after { right: 0; bottom: 0; border-right-width: 2px; border-bottom-width: 2px; }

.page-eyebrow {
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--navy);
  display: block;
  margin-bottom: .7rem;
}
.page-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.8rem, 3.6vw, 2.5rem);
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--ink);
  margin: 0;
}
.page-title .hl { color: var(--navy); }
.page-sub {
  margin: .85rem 0 0;
  color: var(--ink-3);
  font-size: 1.02rem;
  text-wrap: pretty;
}

/* =========================================================================
   Post list (flat datasheet rows)
   ========================================================================= */
.post-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  padding: 1.5rem 1.6rem;
  margin-bottom: 1.1rem;
  transition: border-color .18s var(--ease), background .18s var(--ease);
}
/* left rule lights navy on hover — like a selected row */
.post-card::before {
  content: "";
  position: absolute;
  left: -1px; top: -1px; bottom: -1px;
  width: 2px;
  background: var(--navy);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform .2s var(--ease);
}
.post-card:hover { border-color: var(--ink-4); }
.post-card:hover::before { transform: scaleY(1); }

.post-card-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.3rem;
  line-height: 1.25;
  letter-spacing: -.01em;
  margin: 0 0 .55rem;
}
.post-card-title a { color: var(--ink); }
.post-card-title a:hover { color: var(--navy); }
.post-summary { color: var(--ink-2); margin: 0 0 1.1rem; font-size: .98rem; }

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
}
.meta-date {
  font-family: var(--font-mono);
  font-size: .74rem;
  color: var(--ink-3);
  display: inline-flex;
  align-items: center;
  gap: .4rem;
}
.meta-date svg { width: 13px; height: 13px; opacity: .7; }

/* chips ------------------------------------------------------------------ */
.chip {
  display: inline-flex;
  align-items: center;
  gap: .25rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 500;
  padding: .18rem .55rem;
  border: 1px solid transparent;
  transition: color .15s var(--ease), background .15s var(--ease), border-color .15s var(--ease);
  line-height: 1.5;
}
.chip-cat {
  color: var(--on-navy);
  background: var(--navy);
  clip-path: polygon(0 0, calc(100% - 6px) 0, 100% 6px, 100% 100%, 0 100%);
}
.chip-cat:hover { color: var(--on-navy); background: var(--navy-2); }
.chip-tag {
  color: var(--navy);
  background: transparent;
  border-color: var(--line);
}
.chip-tag:hover { border-color: var(--navy); background: var(--navy-wash); }

/* =========================================================================
   Category grid + tag cloud
   ========================================================================= */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 1rem;
}
.cat-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: .55rem;
  background: var(--card);
  border: 1px solid var(--line);
  padding: 1.4rem 1.4rem 1.5rem;
  color: var(--ink);
  transition: border-color .18s var(--ease);
}
.cat-card::after {
  content: "";
  position: absolute;
  top: .7rem; left: .7rem;
  width: var(--tick); height: var(--tick);
  border: solid var(--navy);
  border-width: 0;
  opacity: 0;
  transition: opacity .18s var(--ease);
}
.cat-card:hover { border-color: var(--ink-4); color: var(--ink); }
.cat-card:hover::after { opacity: 1; border-top-width: 2px; border-left-width: 2px; }
.cat-card-head { display: flex; align-items: center; justify-content: space-between; gap: .8rem; }
.cat-card-name { font-family: var(--font-display); font-weight: 500; font-size: 1.16rem; letter-spacing: -.01em; }
.cat-card-desc { color: var(--ink-3); font-size: .9rem; margin: 0; }
.count-badge {
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 600;
  color: var(--on-navy);
  background: var(--navy);
  padding: .08rem .5rem;
  flex: none;
  clip-path: polygon(0 0, calc(100% - 5px) 0, 100% 5px, 100% 100%, 0 100%);
}

.tag-cloud { display: flex; flex-wrap: wrap; gap: .55rem; }
.tag-pill {
  display: inline-flex;
  align-items: baseline;
  gap: .4rem;
  font-family: var(--font-mono);
  font-size: .84rem;
  color: var(--ink-2);
  background: var(--card);
  border: 1px solid var(--line);
  padding: .4rem .8rem;
  transition: color .15s var(--ease), border-color .15s var(--ease), background .15s var(--ease);
}
.tag-pill:hover { color: var(--navy); border-color: var(--navy); background: var(--navy-wash); }
.tag-pill .n { color: var(--ink-4); font-size: .72rem; }
.tag-pill:hover .n { color: var(--navy); }

/* =========================================================================
   Breadcrumb
   ========================================================================= */
.crumb {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  color: var(--ink-3);
  margin-bottom: 1.4rem;
  flex-wrap: wrap;
}
.crumb a { color: var(--ink-3); }
.crumb a:hover { color: var(--navy); }
.crumb .sep { color: var(--ink-4); }
.crumb .here { color: var(--ink); }

/* =========================================================================
   Pagination
   ========================================================================= */
.pager {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: .35rem;
  margin-top: 2.4rem;
}
.pager a, .pager span {
  font-family: var(--font-mono);
  font-size: .82rem;
  padding: .42rem .7rem;
  min-width: 2.4rem;
  text-align: center;
  border: 1px solid var(--line);
}
.pager a { color: var(--ink-2); background: var(--card); transition: color .15s var(--ease), border-color .15s var(--ease); }
.pager a:hover { border-color: var(--navy); color: var(--navy); }
.pager .current {
  color: var(--on-navy);
  background: var(--navy);
  border-color: var(--navy);
  font-weight: 600;
  clip-path: polygon(0 0, calc(100% - 6px) 0, 100% 6px, 100% 100%, 0 100%);
}
.pager .gap { color: var(--ink-4); border-color: transparent; background: transparent; min-width: auto; padding: .42rem .2rem; }
.pager .disabled { color: var(--ink-4); opacity: .55; }

.pager-jump {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--ink-3);
}
.pager-jump input {
  width: 4rem;
  background: var(--card);
  border: 1px solid var(--line);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: .82rem;
  padding: .38rem .55rem;
  text-align: center;
}
.pager-jump input:focus { outline: none; border-color: var(--navy); }
.pager-jump button {
  font-family: var(--font-mono);
  font-size: .78rem;
  padding: .4rem .9rem;
  border: 1px solid var(--navy);
  background: var(--navy);
  color: var(--on-navy);
  cursor: pointer;
  transition: background .15s var(--ease);
  clip-path: polygon(0 0, calc(100% - 6px) 0, 100% 6px, 100% 100%, 0 100%);
}
.pager-jump button:hover { background: var(--navy-2); }

/* =========================================================================
   Panel (about / prose container)
   ========================================================================= */
.panel {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 2.2rem 2.4rem 2.4rem;
}

.empty {
  border: 1px dashed var(--line);
  padding: 2.5rem;
  text-align: center;
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: .86rem;
}

/* =========================================================================
   Prose (article body + about)
   ========================================================================= */
.prose { color: var(--ink-2); font-size: 15.5px; line-height: 1.75; }
.prose > *:first-child { margin-top: 0; }
.prose pre { max-width: 100%; overflow-x: auto; }
.prose h1, .prose h2, .prose h3, .prose h4 {
  font-family: var(--font-display);
  color: var(--ink);
  line-height: 1.2;
  margin: 2.2rem 0 .9rem;
  font-weight: 700;
  letter-spacing: -.01em;
  scroll-margin-top: calc(var(--header-h) + 20px);
}
.prose h2 { font-size: 1.5rem; padding-bottom: .4rem; border-bottom: 1px solid var(--line); }
.prose h3 { font-size: 1.24rem; }
.prose h4 { font-size: 1.08rem; }
.prose p { margin: 0 0 1.15rem; }
.prose a { border-bottom: 1px solid var(--navy); }
.prose a:hover { border-color: var(--navy-2); }
.prose strong { color: var(--ink); font-weight: 600; }
.prose [style*="color"] strong,
.prose strong[style*="color"] { color: inherit; }
.prose ul, .prose ol { margin: 0 0 1.15rem; padding-left: 1.4rem; }
.prose li { margin: .35rem 0; }
.prose li::marker { color: var(--navy); font-family: var(--font-mono); }
.prose img { max-width: 100%; height: auto; border: 1px solid var(--line); }
.prose blockquote {
  margin: 1.4rem 0;
  padding: .6rem 1.2rem;
  border-left: 2px solid var(--navy);
  background: var(--card-2);
  color: var(--ink-2);
}
.prose blockquote p:last-child { margin-bottom: 0; }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 2rem 0; }
.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.4rem 0;
  font-size: .94rem;
}
.prose th, .prose td { border: 1px solid var(--line); padding: .55rem .8rem; text-align: left; }
.prose th { background: var(--card-2); color: var(--ink); font-weight: 600; font-family: var(--font-mono); font-size: .82rem; letter-spacing: .04em; }
.prose :not(pre) > code {
  font-family: var(--font-mono);
  font-size: .85em;
  background: var(--card-2);
  border: 1px solid var(--line);
  padding: .1em .38em;
  color: var(--navy-2);
}

/* =========================================================================
   Article header
   ========================================================================= */
.article-head { margin-bottom: 1.8rem; }
.article-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.9rem, 4vw, 2.7rem);
  line-height: 1.12;
  letter-spacing: -.025em;
  color: var(--ink);
  margin: .3rem 0 1rem;
}
.article-divider { border: 0; border-top: 1px solid var(--line); margin: 1.5rem 0 2rem; }

/* =========================================================================
   Article footer: tags · share · prev/next · related
   ========================================================================= */
.post-footer {
  margin-top: 2.8rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 2.2rem;
}
.footer-block { display: flex; flex-direction: column; gap: .9rem; }
.section-label {
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--navy);
}
.footer-tags { display: flex; flex-wrap: wrap; gap: .5rem; }

/* share buttons */
.share-row { display: flex; flex-wrap: wrap; gap: .55rem; }
.share-btn {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink-2);
  cursor: pointer;
  position: relative;
  transition: color .15s var(--ease), border-color .15s var(--ease), background .15s var(--ease);
}
.share-btn svg { width: 18px; height: 18px; }
.share-btn:hover { color: var(--on-navy); background: var(--navy); border-color: var(--navy); }
.share-btn.s-link.copied { color: var(--on-navy); background: var(--navy); border-color: var(--navy); }
.share-btn.s-link.copied::after {
  content: "Copied";
  position: absolute;
  bottom: calc(100% + 7px);
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: .66rem;
  color: var(--on-navy);
  background: var(--navy);
  padding: .12rem .45rem;
  white-space: nowrap;
}

/* prev / next */
.post-nav { display: flex; gap: 1rem; }
.post-nav-item {
  flex: 1 1 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: .4rem;
  padding: 1rem 1.2rem;
  border: 1px solid var(--line);
  background: var(--card);
  transition: border-color .18s var(--ease);
}
.post-nav-item.next { text-align: right; }
a.post-nav-item:hover { border-color: var(--navy); }
.post-nav-dir { font-family: var(--font-mono); font-size: .7rem; color: var(--ink-3); }
a.post-nav-item:hover .post-nav-dir { color: var(--navy); }
.post-nav-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1rem;
  line-height: 1.3;
  color: var(--ink);
}

/* related cards */
.rec-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: .9rem;
}
.rec-card {
  display: flex;
  flex-direction: column;
  gap: .45rem;
  padding: 1.05rem 1.2rem;
  border: 1px solid var(--line);
  background: var(--card);
  transition: border-color .18s var(--ease);
}
.rec-card:hover { border-color: var(--navy); }
.rec-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: .98rem;
  line-height: 1.3;
  color: var(--ink);
}
.rec-card:hover .rec-title { color: var(--navy); }
.rec-meta { font-family: var(--font-mono); font-size: .7rem; color: var(--ink-3); }

.btn-back {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  margin-top: 2.4rem;
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--ink-2);
  border: 1px solid var(--line);
  background: var(--card);
  padding: .5rem 1rem;
  transition: color .15s var(--ease), border-color .15s var(--ease);
}
.btn-back:hover { color: var(--navy); border-color: var(--navy); }

/* =========================================================================
   Back-to-top
   ========================================================================= */
.to-top {
  position: fixed;
  right: 1.8rem;
  bottom: 1.8rem;
  z-index: 40;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid var(--navy);
  background: var(--navy);
  color: var(--on-navy);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity .22s var(--ease), transform .22s var(--ease), visibility .22s var(--ease), background .15s var(--ease);
}
.to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover { background: var(--navy-2); }
.to-top svg { width: 19px; height: 19px; }
@media (max-width: 560px) { .to-top { right: 1.1rem; bottom: 1.1rem; } }

/* =========================================================================
   Footer
   ========================================================================= */
.footer {
  border-top: 1px solid var(--line);
  background: var(--paper-2);
}
.footer-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 1.6rem 2rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .6rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--ink-3);
}
.footer-note { color: var(--ink-4); }

/* =========================================================================
   Motion (restrained)
   ========================================================================= */
@keyframes rise {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}
.reveal { animation: rise .45s var(--ease) both; }
.post-card.reveal:nth-child(2) { animation-delay: .05s; }
.post-card.reveal:nth-child(3) { animation-delay: .1s; }
.post-card.reveal:nth-child(4) { animation-delay: .15s; }
.post-card.reveal:nth-child(5) { animation-delay: .2s; }

@media (prefers-reduced-motion: reduce) {
  .reveal { animation: none; }
  html { scroll-behavior: auto; }
}

/* =========================================================================
   Responsive
   ========================================================================= */
@media (max-width: 1000px) {
  .page-grid { grid-template-columns: minmax(0, 1fr); gap: 2.2rem; }
  .page-aside { display: none; }
}

@media (max-width: 820px) {
  .masthead-inner { padding: 0 1.2rem; gap: 1rem; }
  .nav-toggle { display: inline-flex; }
  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    margin: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    padding: .6rem 1.2rem 1.1rem;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity .2s var(--ease), transform .2s var(--ease);
    z-index: 46;
  }
  .nav.is-open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-link { padding: .7rem .2rem; font-size: .82rem; border-bottom: 1px solid var(--line-2); }
  .nav-link.active::after { display: none; }
  .nav-link.active { border-left: 2px solid var(--navy); padding-left: .6rem; }
  .search { margin: .8rem 0 0; }
  .search input { width: 100%; }
  body.nav-open .backdrop { display: block; }
  body.nav-open { overflow: hidden; }
  .shell { padding: 2.2rem 1.2rem 2.6rem; }
}

@media (max-width: 600px) {
  .shell { padding: 1.8rem 1rem 2.2rem; }
  .page-head { margin-bottom: 1.8rem; }
  .post-card { padding: 1.2rem 1.15rem; }
  .post-card-title { font-size: 1.16rem; }
  .article-title { font-size: 1.65rem; }
  .panel { padding: 1.4rem 1.2rem 1.6rem; }
  .rec-grid { grid-template-columns: 1fr; }
  .prose table { display: block; overflow-x: auto; }
  .footer-inner { padding: 1.3rem 1rem; }
}

@media (max-width: 380px) {
  .shell { padding: 1.6rem .85rem 2rem; }
  .pager a, .pager span { min-width: 2.1rem; padding: .38rem .5rem; }
}