/* ────────────────────────────────────────────────────────────────
   Style guide tokens — "Technical Explainer" treatment.
   Warm paper, cold ink, hairline rules, no radius, no shadows.
   Chamfered corners appear only on interactive controls and
   diagram nodes.
   ──────────────────────────────────────────────────────────────── */
:root {
  /* Surfaces */
  --paper:  #F7F5EE;
  --panel:  #FCFBF7;
  --ink:    #14171D;
  --ink-2:  #383B42;
  --ink-3:  #6E6B62;
  --rule:   #E1DDD1;
  --ghost:  #EDE9DE;

  /* State */
  --blue:       #2641D4;
  --blue-wash:  #E7EBFC;
  --red:        #CE3A22;
  --red-wash:   #FAE5E0;
  --green:      #12735A;
  --green-wash: #DFF0E9;

  /* Code (dark) */
  --code-bg:     #0F1115;
  --code-border: #23262E;
  --code-accent: #3B4150;
  --code-text:   #D6D2CA;

  /* Shape */
  --chamfer: 9px;

  /* Type */
  --font-sans:    "DM Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono:    "DM Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --font-display: "DM Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

  /* Type scale — Perfect Fourth ratio, tuned for editorial reading.
     10 · 12 · 13 · 15 · 17 · 20 · 24 · 32 · 44 */
  --fs-micro:   10px;
  --fs-mono-sm: 12px;
  --fs-sm:      13px;
  --fs-body:    15px;
  --fs-md:      17px;
  --fs-lg:      20px;
  --fs-xl:      24px;
  --fs-2xl:     clamp(26px, 3vw, 32px);
  --fs-3xl:     clamp(34px, 4vw, 44px);

  /* Layout */
  --nav-w: 160px;
  --pad:   40px;

  /* Backward-compat aliases so existing markup that references
     the older names continues to resolve to the new palette. */
  --black:  var(--ink);
  --white:  var(--panel);
  --gray:   var(--ink-3);
  --light:  var(--paper);
  --accent: var(--blue);
}

/* ── RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 15px; }
body {
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
  font-size: var(--fs-body);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-optical-sizing: auto;
  font-feature-settings: "kern", "liga", "calt", "ss01";
}
h1, h2, h3, h4, h5, h6 { text-wrap: balance; }
p { text-wrap: pretty; }
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 2px; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

/* ── HEADER (mobile only) ── */
.site-header { display: none; }
.mobile-wordmark,
.hamburger { display: none; }
.mobile-menu { display: none; }
.top-rule { display: none; }

/* ── SHELL (desktop grid) ────────────────────────────────────────
   Sidebar and main share one grid parent so their top edges are
   guaranteed to align. The shared top offset is `--shell-top`.
   ─────────────────────────────────────────────────────────────── */
:root { --shell-top: 72px; }

.site-shell {
  display: grid;
  grid-template-columns: var(--nav-w) 1fr;
  align-items: start;
  padding-top: var(--shell-top);
  min-height: 100vh;
  background: var(--paper);
}

/* ── SIDEBAR (desktop only) ── */
.sidebar {
  position: sticky; top: var(--shell-top);
  align-self: start;
  padding: 0 var(--pad);
}
.sidebar nav { display: flex; flex-direction: column; gap: 4px; margin-top: 0; }
.sidebar nav a {
  font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .06em;
  color: var(--ink-2); line-height: 1.9; text-transform: uppercase;
}
.sidebar nav a.active { color: var(--ink); font-weight: 500; }
.sidebar nav a:hover { text-decoration: none; color: var(--blue); }

.sidebar nav a.soon {
  color: var(--rule); cursor: default; pointer-events: none;
  display: flex; align-items: baseline; gap: 8px;
}
.soon-label { font-family: var(--font-mono); font-size: 9.5px; color: var(--rule); letter-spacing: .12em; text-transform: uppercase; }

/* ── MAIN ── */
main { min-height: 0; background: transparent; }
.page-content { padding: 0 var(--pad) var(--pad); }

/* ── PAGE LABEL / BREADCRUMB ── */
.page-label {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink); margin-bottom: 28px;
  padding-bottom: 10px; border-bottom: 1px solid var(--rule);
}
.breadcrumb { color: var(--ink-3); }
.breadcrumb a { color: var(--ink-3); }
.breadcrumb a:hover { color: var(--ink); text-decoration: none; }

.block-header {
  font-family: var(--font-mono); font-size: 10px; font-weight: 400;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink-3); margin-bottom: 18px;
}

/* ── SEARCH ── */
.search-overlay {
  position: fixed; inset: 0; background: var(--panel);
  z-index: 200; padding: var(--pad); display: none; flex-direction: column;
}
.search-overlay.open { display: flex; }
.search-close {
  align-self: flex-end;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink-3); cursor: pointer; margin-bottom: 20px;
}
.search-close:hover { color: var(--ink); text-decoration: none; }
.search-input-wrap {
  border-bottom: 1px solid var(--ink);
  display: flex; align-items: center; gap: 10px; padding-bottom: 6px; max-width: 500px;
}
.search-input-wrap label {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3);
}
.search-input {
  border: none; outline: none; background: transparent;
  font-family: var(--font-sans); font-size: 15px; color: var(--ink); flex: 1;
}

/* ── MOBILE NAV ── */
.mobile-nav {
  display: none; flex-wrap: wrap; gap: 10px 18px;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--ink-2); margin-bottom: 28px;
  padding-bottom: 18px; border-bottom: 1px solid var(--rule);
}
.mobile-nav a.active { color: var(--ink); font-weight: 500; }
.mobile-nav a.soon   { color: var(--rule); cursor: default; pointer-events: none; }
.mobile-nav a.soon .soon-label { color: var(--rule); }

/* ╔══════════════════════════════════════════════════════════════╗
   HOME
   ╚══════════════════════════════════════════════════════════════╝ */
.home-intro-block { margin-bottom: 52px; max-width: 58ch; }
.home-intro-block .tagline {
  font-family: var(--font-display); font-style: italic;
  font-size: 22px; line-height: 1.4; letter-spacing: -.015em;
  margin-bottom: 20px; color: var(--ink);
}
.home-intro-block .location {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink-3); margin-bottom: 18px;
}
.home-intro-block p { font-size: 15px; line-height: 1.65; margin-bottom: 12px; color: var(--ink-2); }

.skills-block { margin-bottom: 50px; }
.skills-list {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 1px; background: var(--rule);
  border: 1px solid var(--rule);
  max-width: 720px;
}
.skill-item {
  background: var(--panel);
  padding: 14px 16px;
  font-size: 14px; color: var(--ink);
}
.skill-item span {
  display: block; font-family: var(--font-mono);
  font-size: 10.5px; letter-spacing: .06em;
  color: var(--ink-3); margin-top: 4px;
}

.focus-block { max-width: 620px; margin-bottom: 50px; }
.focus-list { border-top: 1px solid var(--rule); }
.focus-item {
  display: flex; gap: 40px; padding: 12px 0;
  border-bottom: 1px solid var(--rule); font-size: 14px; color: var(--ink);
}
.fi-label {
  width: 120px; flex-shrink: 0;
  font-family: var(--font-mono); font-size: 10px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink-3); padding-top: 2px;
}

.preview-list { border-top: 1px solid var(--rule); max-width: 620px; margin-bottom: 50px; }
.preview-row-item {
  display: flex; gap: 40px; padding: 14px 0;
  border-bottom: 1px solid var(--rule); font-size: 14px;
}
.preview-row-item:hover .preview-row-title { color: var(--blue); text-decoration: none; }
.preview-row-date {
  width: 90px; flex-shrink: 0;
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .05em; color: var(--ink-3);
  padding-top: 2px;
}
.preview-row-meta { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .05em; color: var(--ink-3); }
.preview-row-title { font-size: 14px; color: var(--ink); }

.cta-block { margin-top: 40px; max-width: 54ch; margin-bottom: 60px; }
.cta-block p { font-size: 15px; line-height: 1.6; margin-bottom: 18px; color: var(--ink-2); }
.cta-link {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .04em;
  color: var(--blue); border-bottom: 1px solid var(--blue);
  padding-bottom: 1px; transition: color .15s, border-color .15s;
}
.cta-link:hover { color: var(--ink); border-color: var(--ink); text-decoration: none; }

.section-divider { border: none; border-top: 1px solid var(--rule); margin: 0 0 36px 0; }

/* ╔══════════════════════════════════════════════════════════════╗
   ABOUT / CONTACT
   ╚══════════════════════════════════════════════════════════════╝ */
.about-3col {
  display: grid; grid-template-columns: 180px 1fr 220px;
  gap: 48px; align-items: flex-start; margin-bottom: 60px;
}
.about-portrait img { width: 100%; display: block; filter: grayscale(15%); }

.about-quote {
  font-family: var(--font-display); font-style: italic;
  font-size: 17px; line-height: 1.5; letter-spacing: -.01em;
  margin-bottom: 4px; color: var(--ink);
}
.about-quote-attr {
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .06em;
  color: var(--ink-3); margin-bottom: 24px;
}
.about-col p { font-size: 15px; line-height: 1.65; margin-bottom: 12px; color: var(--ink-2); }
.about-col a { text-decoration: underline; text-underline-offset: 2px; }
.about-col hr { border: none; border-top: 1px solid var(--rule); margin: 20px 0; }
.about-sub-label {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink-3); margin-bottom: 12px;
}
.ed-item { font-size: 14px; margin-bottom: 10px; color: var(--ink); }
.ed-item span {
  display: block; font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .04em;
  color: var(--ink-3); margin-top: 2px;
}

.contact-col p { font-size: 15px; line-height: 1.6; margin-bottom: 20px; color: var(--ink-2); }
.contact-block { margin-bottom: 24px; }
.contact-block strong {
  display: block; font-family: var(--font-mono); font-size: 10px; letter-spacing: .14em;
  text-transform: uppercase; color: var(--ink-3); font-weight: 400; margin-bottom: 6px;
}
.contact-block a { display: block; font-size: 13.5px; line-height: 1.9; text-decoration: underline; text-underline-offset: 2px; }
.contact-block span { display: block; font-size: 13.5px; line-height: 1.9; color: var(--ink-2); }

/* ╔══════════════════════════════════════════════════════════════╗
   WORK INDEX
   ╚══════════════════════════════════════════════════════════════╝ */
.work-intro { max-width: 58ch; font-size: var(--fs-body); line-height: 1.65; margin-bottom: 44px; color: var(--ink-2); }

.work-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 40px 28px;
}
.work-item { background: transparent; padding: 0; }
.work-item a { display: block; }
.work-item a:hover .work-title { color: var(--blue); text-decoration: none; }
.work-item a:hover .work-thumb-inner { transform: scale(1.02); }
.work-thumb {
  aspect-ratio: 4/3; margin-bottom: 14px; overflow: hidden;
  border: 0; background: transparent;
}
.work-thumb-inner {
  width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-size: 22px; font-weight: 400; letter-spacing: -.02em;
  transition: transform .35s ease; user-select: none;
}
.work-title { font-size: 14px; line-height: 1.4; color: var(--ink); font-weight: 400; }
.work-meta {
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .05em;
  color: var(--ink-3); margin-top: 3px;
}
.wt-1 { background: #EFE7D8; color: #3E2A0F; }
.wt-2 { background: var(--blue-wash); color: var(--blue); }
.wt-3 { background: #F0E6D3; color: #4A2F0A; }
.wt-4 { background: var(--green-wash); color: var(--green); }
.wt-5 { background: #EEE4EE; color: #3E1F49; }
.wt-6 { background: var(--red-wash); color: var(--red); }
.wt-7 { background: var(--ghost); color: var(--ink); }
.wt-8 { background: var(--ink); color: var(--panel); }

/* ╔══════════════════════════════════════════════════════════════╗
   LEARN INDEX
   ╚══════════════════════════════════════════════════════════════╝ */
.learn-intro { max-width: 58ch; font-size: var(--fs-body); line-height: 1.65; margin-bottom: 44px; color: var(--ink-2); }
.learn-list { border-top: 1px solid var(--rule); max-width: 820px; }
.learn-item {
  display: flex; gap: 40px; padding: 16px 0;
  border-bottom: 1px solid var(--rule);
}
.learn-item:hover .learn-title { color: var(--blue); text-decoration: none; }
.learn-date {
  width: 100px; flex-shrink: 0;
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .05em;
  color: var(--ink-3); padding-top: 3px;
}
.learn-title { font-size: 15.5px; font-weight: 600; margin-bottom: 4px; color: var(--ink); letter-spacing: -.012em; }
.learn-desc { font-size: 13.5px; color: var(--ink-2); line-height: 1.55; margin-bottom: 8px; }
.learn-tag {
  display: inline-block; font-family: var(--font-mono);
  font-size: 10px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--blue); background: var(--blue-wash);
  padding: 3px 8px; margin-top: 2px;
}

/* ╔══════════════════════════════════════════════════════════════╗
   JOURNAL INDEX
   ╚══════════════════════════════════════════════════════════════╝ */
.journal-intro { max-width: 58ch; font-size: var(--fs-body); line-height: 1.65; margin-bottom: 44px; color: var(--ink-2); }

/* ── Coming-soon placeholder — shared by journal/work when empty ── */
.coming-soon {
  padding: 40px 0 60px;
  border-top: 1px solid var(--rule);
}
.coming-soon-eyebrow {
  font-family: var(--font-mono);
  font-size: 10px; font-weight: 500;
  letter-spacing: .18em; text-transform: uppercase;
  color: var(--blue); margin: 0 0 14px;
}
.coming-soon-body {
  font-size: 17px; line-height: 1.55;
  letter-spacing: -.006em; color: var(--ink);
  margin: 0; max-width: 42ch;
}
.journal-list { border-top: 1px solid var(--rule); max-width: 820px; }
.journal-item {
  display: flex; gap: 40px; padding: 16px 0;
  border-bottom: 1px solid var(--rule);
}
.journal-item:hover .ji-title { color: var(--blue); text-decoration: none; }
.ji-date {
  width: 100px; flex-shrink: 0;
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .05em;
  color: var(--ink-3); padding-top: 3px;
}
.ji-title { font-size: 15px; margin-bottom: 6px; color: var(--ink); letter-spacing: -.005em; }
.ji-excerpt { font-size: 13.5px; color: var(--ink-2); line-height: 1.6; }

/* ╔══════════════════════════════════════════════════════════════╗
   SINGLE PAGES
   ╚══════════════════════════════════════════════════════════════╝ */
.single-layout { display: flex; gap: 60px; align-items: flex-start; }

.single-body { flex: 1; max-width: 60ch; }
.single-title {
  font-size: var(--fs-2xl); font-weight: 500;
  letter-spacing: -.028em; margin-bottom: 10px; line-height: 1.08;
  max-width: 22ch; color: var(--ink);
}
.single-date {
  font-family: var(--font-mono); font-size: var(--fs-micro); letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink-3); margin-bottom: 28px;
}
.single-lede {
  font-family: var(--font-display); font-style: italic;
  font-size: var(--fs-md); line-height: 1.55; letter-spacing: -.01em;
  margin-bottom: 28px; color: var(--ink-2);
}
.single-body p { font-size: var(--fs-body); line-height: 1.7; margin-bottom: 16px; color: var(--ink); }
.single-body h2 {
  font-size: var(--fs-md); font-weight: 500; letter-spacing: -.012em;
  margin: 36px 0 12px; color: var(--ink);
}
.single-body hr { border: none; border-top: 1px solid var(--rule); margin: 28px 0; }
.single-body a { text-decoration: underline; text-underline-offset: 2px; color: var(--blue); }
.single-body code {
  font-family: var(--font-mono); font-size: .88em;
  background: var(--ghost); color: var(--ink); padding: 1px 5px;
}
.single-body blockquote {
  border-left: 2px solid var(--blue); padding: 4px 0 4px 18px;
  font-family: var(--font-display); font-style: italic;
  font-size: 16px; line-height: 1.55; color: var(--ink-2); margin: 24px 0;
}
.single-body ul { padding-left: 18px; margin-bottom: 16px; }
.single-body ul li { font-size: 15px; line-height: 1.7; margin-bottom: 4px; color: var(--ink); }

.img-placeholder,
.img-placeholder-sq {
  width: 100%;
  background: var(--panel);
  border: 1px solid var(--rule);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-size: 10px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 6px;
  background-image: radial-gradient(var(--rule) .8px, transparent .8px);
  background-size: 17px 17px; background-position: -1px -1px;
}
.img-placeholder    { aspect-ratio: 16/9; }
.img-placeholder-sq { aspect-ratio: 4/3;  }
.img-caption {
  font-family: var(--font-mono); font-size: 11px; line-height: 1.5;
  color: var(--ink-3); margin-bottom: 24px;
}

/* Sidebar column */
.single-sidebar-col { width: 220px; flex-shrink: 0; padding-top: 6px; }
.single-meta-block { margin-bottom: 26px; }
.single-meta-label {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink-3); margin-bottom: 8px; font-weight: 400;
}
.single-meta-value { font-size: 14px; line-height: 1.65; color: var(--ink); }
.single-meta-value a { text-decoration: underline; text-underline-offset: 2px; }
.single-tag {
  display: inline-block; font-family: var(--font-mono);
  font-size: 10px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink-2); background: var(--ghost);
  padding: 3px 8px; margin: 2px 2px 2px 0;
}

/* Prev / next */
.single-nav {
  display: flex; justify-content: space-between;
  border-top: 1px solid var(--rule);
  padding-top: 20px; margin-top: 48px; max-width: 60ch;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .1em; text-transform: uppercase;
}
.single-nav a { color: var(--ink-3); }
.single-nav a:hover { color: var(--blue); text-decoration: none; }

.work-img-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 1px; background: var(--rule);
  border: 1px solid var(--rule);
  margin: 24px 0;
}
.work-img-grid > div { background: var(--panel); padding: 10px; }
.work-img-grid .img-placeholder-sq { margin-bottom: 8px; }

/* ╔══════════════════════════════════════════════════════════════╗
   FOOTER
   ╚══════════════════════════════════════════════════════════════╝ */
.site-footer {
  margin-left: var(--nav-w);
  padding: 24px var(--pad);
  border-top: 1px solid var(--rule);
  background: var(--paper);
}
.site-footer p {
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .06em;
  color: var(--ink-3); margin: 0;
}

/* ╔══════════════════════════════════════════════════════════════╗
   STYLE-GUIDE COMPONENTS
   Re-usable primitives (used by the components page and by any
   article page that wants to reach for them).
   ╚══════════════════════════════════════════════════════════════╝ */

/* ── Section rhythm ── */
.sec { padding: 46px 0 0; }
.sec-head {
  display: flex; align-items: baseline; gap: 18px;
  margin-bottom: 24px; flex-wrap: wrap;
  border-bottom: 1px solid var(--rule); padding-bottom: 12px;
}
.sec-head h2 {
  font-size: var(--fs-lg); font-weight: 500; letter-spacing: -.02em; color: var(--ink);
}
.sec-head p { font-size: var(--fs-sm); line-height: 1.55; color: var(--ink-2); max-width: 54ch; }

.eyebrow {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--blue); font-weight: 400;
}
.panel-label {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: .15em;
  text-transform: uppercase; color: var(--ink-3);
}
.micro-label {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: .13em;
  text-transform: uppercase; color: var(--ink-3);
}
.lede {
  font-size: 16px; line-height: 1.55; color: var(--ink-2); max-width: 58ch;
}

/* ── 1-px hairline grid ── */
.grid {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px; background: var(--rule);
  border: 1px solid var(--rule);
}
.grid > * { background: var(--panel); padding: 20px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* ── Buttons ── */
.btn,
button.btn {
  font-family: var(--font-sans); font-size: 13px; font-weight: 500;
  border: 0; padding: 9px 14px; cursor: pointer; line-height: 1;
  color: var(--panel); background: var(--ink);
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px),
                     calc(100% - 8px) 100%, 0 100%, 0 8px);
  transition: background .14s ease, color .14s ease;
}
.btn:hover        { background: var(--blue); }
.btn:focus-visible{ outline: 0; box-shadow: inset 0 0 0 2px var(--blue); }
.btn:disabled     { background: var(--rule); color: var(--ink-3); cursor: not-allowed; }

.btn.ghost        { background: var(--ghost); color: var(--ink); }
.btn.ghost:hover  { background: var(--ink); color: var(--panel); }
.btn.warn         { background: var(--red); color: var(--panel); }
.btn.warn:hover   { background: var(--ink); }
.btn.rst {
  background: transparent; color: var(--ink-3);
  padding: 7px 6px; clip-path: none;
}
.btn.rst:hover {
  background: transparent; color: var(--ink);
  text-decoration: underline; text-underline-offset: 3px;
}

/* ── Input ── */
.field {
  font-family: var(--font-sans); font-size: 13.5px;
  padding: 10px 12px; border: 0;
  background: var(--panel); color: var(--ink);
  clip-path: polygon(9px 0, 100% 0, 100% calc(100% - 9px),
                     calc(100% - 9px) 100%, 0 100%, 0 9px);
  outline: none;
}
.field::placeholder { color: var(--ink-3); }
.field:focus-visible { box-shadow: inset 0 0 0 2px var(--blue); }

/* ── Tabs & chips ── */
.tabs { display: flex; gap: 4px; flex-wrap: wrap; }
.tab {
  font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .06em;
  padding: 6px 11px; background: var(--ghost); color: var(--ink-2);
  border: 0; cursor: pointer;
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px),
                     calc(100% - 8px) 100%, 0 100%, 0 8px);
}
.tab[aria-selected="true"] { background: var(--ink); color: var(--panel); }
.tab.arg[aria-selected="true"] { background: var(--blue); color: var(--panel); }

.chip {
  display: inline-block; font-family: var(--font-mono);
  font-size: 11px; letter-spacing: .05em;
  color: var(--ink-2); background: var(--ghost);
  padding: 4px 8px;
}

.viewtog { display: inline-flex; }
.viewtog button {
  font-family: var(--font-mono); font-size: 9.5px; letter-spacing: .12em;
  text-transform: uppercase; padding: 5px 9px;
  background: var(--ghost); color: var(--ink-2); border: 0; cursor: pointer;
}
.viewtog button[aria-pressed="true"] { background: var(--ink); color: var(--panel); }

/* ── Sticky toolbar ── */
.toolbar {
  position: sticky; top: 0; z-index: 20;
  background: var(--panel);
  border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule);
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 9px 12px;
}
.toolbar .sp { flex: 1; }
.tb-div { width: 1px; align-self: stretch; background: var(--rule); margin: 0 4px; }

/* ── Board (drawing surface) ── */
.board {
  background: var(--panel);
  border: 1px solid var(--rule);
  max-height: 520px; overflow: auto; padding: 10px;
  background-image: radial-gradient(var(--rule) .8px, transparent .8px);
  background-size: 17px 17px; background-position: -1px -1px;
}
.board.fit {
  display: flex; align-items: center; justify-content: center; overflow: hidden;
}

/* ── Example card ── */
.case {
  background: var(--panel);
  border: 1px solid var(--rule);
  padding: 20px;
}
.case-n {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .14em;
  text-transform: uppercase; color: var(--blue); margin-bottom: 8px;
}
.case h3 {
  font-size: 17px; font-weight: 500; letter-spacing: -.015em;
  color: var(--ink); margin-bottom: 2px;
}
.case-sub {
  font-family: var(--font-mono); font-size: 11px; color: var(--ink-3);
  margin-bottom: 12px;
}
.canvas {
  background: var(--paper); border: 1px solid var(--rule);
  padding: 8px; overflow: hidden;
  background-image: radial-gradient(var(--rule) .8px, transparent .8px);
  background-size: 15px 15px; background-position: -1px -1px;
}
.canvas svg { width: 100%; height: auto; display: block; margin: 0 auto; }

.cap {
  font-family: var(--font-mono); font-size: 11px; line-height: 1.5;
  color: var(--ink-2); margin-top: 8px; min-height: 2.9em;
  border-left: 2px solid var(--rule); padding-left: 9px;
}
.cap.k-hit  { border-left-color: var(--red);   color: var(--red);   }
.cap.k-succ { border-left-color: var(--green); color: var(--green); }
.cap.k-done { border-left-color: var(--blue);  color: var(--blue);  }

.runbar { display: flex; gap: 8px; margin: 12px 0; }
.case .body {
  font-size: 13.5px; line-height: 1.65; color: var(--ink-2); margin-top: 8px;
}

/* ── Code blocks (dark) ── */
pre.aside, pre.code {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-left: 2px solid var(--code-accent);
  padding: 12px 0; overflow-x: auto; margin: 0 0 12px;
  font-family: var(--font-mono);
  color: var(--code-text);
}
pre.aside { font-size: 11.5px; line-height: 1.78; }
pre.code  { font-size: 12.5px; line-height: 1.78; }
pre.aside .ln, pre.code .ln {
  display: block; padding: 0 14px;
  border-left: 2px solid transparent;
  white-space: pre; transition: background .16s ease;
}
pre.aside .ln.on, pre.code .ln.on {
  background: rgba(125, 160, 255, .14); border-left-color: #7DA0FF;
}
pre.aside .ln.on-r, pre.code .ln.on-r {
  background: rgba(232, 153, 122, .15); border-left-color: #E8997A;
}
pre.aside .ln.on-g, pre.code .ln.on-g {
  background: rgba(95, 211, 176, .14); border-left-color: #5FD3B0;
}
.c-kw { color: #7DA0FF; }
.c-ty { color: #5FD3B0; }
.c-fn { color: #E8C36A; }
.c-st { color: #E8997A; }
.c-nu { color: #B9E08A; }
.c-cm { color: #6D6A64; }
.c-an { color: #C79BE0; }
.c-pn { color: #87837C; }
.c-id { color: #D6D2CA; }

/* ── Reference table ── */
.contract {
  width: 100%; border-collapse: collapse; background: var(--panel);
}
.contract th {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: .14em;
  text-transform: uppercase; color: var(--ink-3); font-weight: 400;
  text-align: left; padding: 0 16px 9px 0;
  border-bottom: 1px solid var(--ink);
}
.contract td {
  padding: 10px 16px 10px 0; border-bottom: 1px solid var(--rule);
  vertical-align: top; color: var(--ink-2); font-size: 13.5px;
}
.contract td.m { font-family: var(--font-mono); font-size: 12px; color: var(--ink); }
.contract td.c { font-family: var(--font-mono); font-size: 11.5px; color: var(--blue); }

/* ── Trace list ── */
.ops {
  font-family: var(--font-mono); font-size: 11.5px; line-height: 1.9;
  background: var(--paper); border-left: 2px solid var(--rule);
  padding: 10px 12px; color: var(--ink-3);
}
.ops div { color: var(--ink-3); transition: color .2s ease, background .2s ease; }
.ops div.on   { color: var(--ink);   background: var(--blue-wash); }
.ops div.done { color: var(--ink-2); }

/* ── Legend & progress ── */
.legend {
  display: flex; flex-wrap: wrap; gap: 14px;
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .05em;
  text-transform: uppercase; color: var(--ink-2);
}
.legend > span { display: inline-flex; align-items: center; gap: 6px; }
.swatch {
  display: inline-block; width: 12px; height: 12px;
  border: 1.6px solid var(--ink); background: var(--panel);
  clip-path: polygon(3px 0, 100% 0, 100% calc(100% - 3px),
                     calc(100% - 3px) 100%, 0 100%, 0 3px);
}
.swatch.path   { border-color: var(--blue);  background: var(--blue-wash);  }
.swatch.target { border-color: var(--red);   background: var(--red-wash);   }
.swatch.succ   { border-color: var(--green); background: var(--green-wash); }

.prog {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: .13em;
  text-transform: uppercase; color: var(--ink-3); margin-left: auto;
}

/* Colour swatch tiles used on the components page */
.tile {
  display: flex; flex-direction: column; gap: 10px;
  background: var(--panel); border: 1px solid var(--rule);
  padding: 12px;
}
.tile .fill {
  width: 100%; aspect-ratio: 3/2; border: 1px solid var(--rule);
}
.tile .name {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .06em;
  color: var(--ink); text-transform: uppercase;
}
.tile .val {
  font-family: var(--font-mono); font-size: 10.5px; color: var(--ink-3);
}

/* ╔══════════════════════════════════════════════════════════════╗
   BREAKPOINTS — 1000 · 760 · 480
   ╚══════════════════════════════════════════════════════════════╝ */
@media (max-width: 1000px) {
  .grid, .grid-4 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .work-grid { grid-template-columns: repeat(3, 1fr); }
}

/* Tablet & phone — sidebar swaps for hamburger drawer. */
@media (max-width: 760px) {
  :root { --nav-w: 0px; --pad: 20px; }

  .sidebar { display: none; }
  .mobile-nav { display: none !important; }   /* replaced by drawer */
  .site-shell { grid-template-columns: 1fr; padding-top: 56px; }
  main { margin-left: 0; padding-top: 0; }
  .page-content { padding: var(--pad); }
  .site-footer { margin-left: 0; padding: 20px; }

  /* Mobile header — fixed, wordmark left, hamburger right */
  .site-header {
    display: flex; position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    align-items: center; justify-content: space-between;
    padding: 10px var(--pad); min-height: 56px;
    background: var(--paper);
    border-bottom: 1px solid transparent;
    transition: border-color .25s ease;
  }
  .site-header.scrolled { border-color: var(--rule); }

  .mobile-wordmark {
    display: inline-block;
    font-family: var(--font-sans); font-weight: 500; font-size: 15px;
    letter-spacing: -.01em; color: var(--ink);
  }
  .mobile-wordmark:hover { text-decoration: none; color: var(--blue); }

  /* Hamburger — 3 bars morph to X on aria-expanded */
  .hamburger {
    display: block; position: relative;
    width: 40px; height: 32px;
    background: transparent; border: 0; padding: 0; cursor: pointer;
  }
  .hamburger span {
    position: absolute; left: 6px; width: 28px; height: 2px;
    background: var(--ink); border-radius: 0;
    transition: transform .32s cubic-bezier(.6,.05,.28,.99),
                top       .32s cubic-bezier(.6,.05,.28,.99),
                opacity   .18s ease;
  }
  .hamburger span:nth-child(1) { top: 9px;  }
  .hamburger span:nth-child(2) { top: 15px; }
  .hamburger span:nth-child(3) { top: 21px; }
  .hamburger[aria-expanded="true"] span:nth-child(1) {
    top: 15px; transform: rotate(45deg);
  }
  .hamburger[aria-expanded="true"] span:nth-child(2) {
    opacity: 0; transform: translateX(-8px);
  }
  .hamburger[aria-expanded="true"] span:nth-child(3) {
    top: 15px; transform: rotate(-45deg);
  }
  .hamburger:focus-visible {
    outline: 0; box-shadow: inset 0 0 0 2px var(--blue);
  }

  /* Drawer overlay */
  .mobile-menu {
    display: block; position: fixed;
    top: 56px; left: 0; right: 0; bottom: 0; z-index: 95;
    background: var(--paper);
    padding: 32px var(--pad) 40px;
    opacity: 0; visibility: hidden;
    transform: translateY(-8px);
    transition: opacity .22s ease, transform .28s ease, visibility .28s ease;
  }
  .mobile-menu.open {
    opacity: 1; visibility: visible; transform: translateY(0);
  }
  .mobile-menu nav { display: flex; flex-direction: column; }
  .mobile-menu nav a {
    font-family: var(--font-display);
    font-size: clamp(28px, 8vw, 42px); font-weight: 500;
    letter-spacing: -.028em; line-height: 1.1;
    color: var(--ink); padding: 18px 0;
    border-bottom: 1px solid var(--rule);
    transition: color .18s ease, padding-left .28s ease;
  }
  .mobile-menu nav a:hover,
  .mobile-menu nav a:focus-visible {
    text-decoration: none; color: var(--blue);
    padding-left: 6px;
  }
  .mobile-menu nav a.active { color: var(--blue); }
  .mobile-menu nav a.active::after {
    content: "•"; margin-left: 10px; color: var(--blue);
  }
  .mobile-menu nav a.soon {
    color: var(--rule); cursor: default; pointer-events: none;
    display: flex; align-items: baseline; gap: 12px;
  }
  .mobile-menu nav a.soon:hover { color: var(--rule); padding-left: 0; }
  .mobile-menu nav a.soon .soon-label {
    font-family: var(--font-mono); font-size: 12px; letter-spacing: .14em;
    text-transform: uppercase; color: var(--rule);
  }

  /* Content collapses */
  .about-3col   { grid-template-columns: 1fr !important; gap: 32px; }
  .work-grid    { grid-template-columns: repeat(2, 1fr); gap: 32px 20px; }
  .skills-list  { grid-template-columns: repeat(2, 1fr); }
  .focus-item   { flex-direction: column; gap: 4px; }
  .fi-label     { width: auto !important; }
  .learn-item, .journal-item { flex-direction: column; gap: 6px; }
  .learn-date, .ji-date      { width: auto !important; }
  .single-layout { flex-direction: column !important; gap: 32px !important; }
  .single-sidebar-col { width: auto !important; }
  .preview-row-item  { flex-direction: column; gap: 3px; }
  .preview-row-date  { width: auto !important; }
}

/* Narrow phone */
@media (max-width: 480px) {
  :root { --pad: 16px; }
  .work-grid { grid-template-columns: 1fr; gap: 28px; }
  .mobile-menu nav a { font-size: clamp(24px, 7vw, 34px); padding: 14px 0; }
  .site-footer { padding: 16px; }
}