/* The Emerald Mile — original stylesheet. Premium / minimal luxury.
   Monochrome ink + ivory with a single emerald jewel accent. Light + dark.
   All classes use the lx- prefix. No lifted styles. */

/* ---- design tokens ---- */
:root {
  --lx-ink: #14181a;
  --lx-ink-soft: #3c4448;
  --lx-ink-faint: #6b7378;
  --lx-ivory: #f7f5ef;
  --lx-paper: #ffffff;
  --lx-line: #d9d5c9;
  --lx-line-strong: #14181a;
  --lx-emerald: #0d7a55;
  --lx-emerald-deep: #095c40;
  --lx-emerald-tint: #e6f1eb;
  --lx-focus: #0d7a55;
  --lx-shadow: 0 1px 0 rgba(20, 24, 26, 0.04);

  --lx-serif: "Didot", "Bodoni MT", "Hoefler Text", "Playfair Display", Georgia, "Times New Roman", serif;
  --lx-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --lx-mono: ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;

  --lx-maxw: 68rem;
  --lx-readw: 44rem;
  --lx-gap: clamp(1.25rem, 4vw, 3rem);
  --lx-radius: 2px;
}

:root[data-theme="dark"] {
  --lx-ink: #eceae3;
  --lx-ink-soft: #b7b8b2;
  --lx-ink-faint: #8b8d87;
  --lx-ivory: #101312;
  --lx-paper: #171b19;
  --lx-line: #2a302d;
  --lx-line-strong: #eceae3;
  --lx-emerald: #47c896;
  --lx-emerald-deep: #6fd8ae;
  --lx-emerald-tint: #12251d;
  --lx-focus: #47c896;
  --lx-shadow: 0 1px 0 rgba(0, 0, 0, 0.3);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --lx-ink: #eceae3;
    --lx-ink-soft: #b7b8b2;
    --lx-ink-faint: #8b8d87;
    --lx-ivory: #101312;
    --lx-paper: #171b19;
    --lx-line: #2a302d;
    --lx-line-strong: #eceae3;
    --lx-emerald: #47c896;
    --lx-emerald-deep: #6fd8ae;
    --lx-emerald-tint: #12251d;
    --lx-focus: #47c896;
  }
}

/* ---- base ---- */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--lx-ivory);
  color: var(--lx-ink);
  font-family: var(--lx-sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  letter-spacing: 0.005em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a { color: var(--lx-emerald-deep); text-underline-offset: 0.18em; text-decoration-thickness: 1px; }
a:hover { color: var(--lx-emerald); }

:focus-visible {
  outline: 2px solid var(--lx-focus);
  outline-offset: 3px;
  border-radius: 2px;
}

.lx-skip {
  position: absolute; left: -999px; top: 0;
  background: var(--lx-ink); color: var(--lx-ivory);
  padding: 0.6rem 1rem; z-index: 100; border-radius: 0 0 var(--lx-radius) 0;
}
.lx-skip:focus { left: 0; }

.lx-container { width: 100%; max-width: var(--lx-maxw); margin-inline: auto; padding-inline: clamp(1.1rem, 5vw, 2.5rem); }

/* ---- typography ---- */
.lx-display, .lx-h1, .lx-h2, .lx-h3 { font-family: var(--lx-serif); font-weight: 400; letter-spacing: 0.01em; }
.lx-h1 {
  font-size: clamp(2.3rem, 6vw, 4rem);
  line-height: 1.04;
  margin: 0 0 1rem;
  letter-spacing: -0.01em;
}
.lx-h2 {
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  line-height: 1.12;
  margin: 0 0 0.9rem;
}
.lx-h3 { font-size: clamp(1.2rem, 2.4vw, 1.5rem); line-height: 1.2; margin: 0 0 0.5rem; }
.lx-eyebrow {
  font-family: var(--lx-sans);
  text-transform: uppercase;
  letter-spacing: 0.28em;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--lx-emerald-deep);
  margin: 0 0 1.1rem;
}
.lx-lede { font-size: clamp(1.12rem, 2vw, 1.32rem); line-height: 1.55; color: var(--lx-ink-soft); max-width: var(--lx-readw); }

.lx-prose { max-width: var(--lx-readw); }
.lx-prose p, .lx-prose ul, .lx-prose ol { margin: 0 0 1.1rem; }
.lx-prose ul, .lx-prose ol { padding-left: 1.2rem; }
.lx-prose li { margin: 0 0 0.4rem; }
.lx-prose h2 { margin-top: 2.4rem; }
.lx-prose h3 { margin-top: 1.8rem; }

/* hairline rules */
.lx-rule { border: 0; border-top: 1px solid var(--lx-line); margin: 0; }
.lx-rule--ink { border-top: 1px solid var(--lx-line-strong); }

/* ---- masthead ---- */
.lx-masthead { border-bottom: 1px solid var(--lx-line); background: color-mix(in srgb, var(--lx-ivory) 88%, transparent); position: sticky; top: 0; z-index: 40; backdrop-filter: saturate(1.2) blur(8px); }
.lx-masthead__inner { display: flex; align-items: center; gap: 1rem; min-height: 4.6rem; }
.lx-brand { display: inline-flex; align-items: center; gap: 0.55rem; text-decoration: none; color: var(--lx-ink); }
.lx-brand__name { font-family: var(--lx-serif); font-size: 1.28rem; letter-spacing: 0.02em; }
.lx-mark { color: var(--lx-emerald); flex: none; }

.lx-nav { margin-left: auto; }
.lx-nav ul { list-style: none; display: flex; gap: clamp(1rem, 2.2vw, 1.9rem); margin: 0; padding: 0; }
.lx-nav a { color: var(--lx-ink-soft); text-decoration: none; font-size: 0.94rem; letter-spacing: 0.02em; padding: 0.4rem 0; position: relative; }
.lx-nav a:hover { color: var(--lx-ink); }
.lx-nav a[aria-current="page"] { color: var(--lx-ink); }
.lx-nav a[aria-current="page"]::after { content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 1px; background: var(--lx-emerald); }

.lx-theme { margin-left: 0.4rem; background: none; border: 1px solid var(--lx-line); border-radius: 999px; width: 2.3rem; height: 2.3rem; display: inline-grid; place-items: center; cursor: pointer; color: var(--lx-ink); flex: none; }
.lx-theme__ico { width: 1rem; height: 1rem; border-radius: 50%; background: var(--lx-ink); box-shadow: inset -0.32rem -0.18rem 0 0 var(--lx-ivory); }
:root[data-theme="dark"] .lx-theme__ico { background: var(--lx-emerald); box-shadow: none; }

.lx-navtoggle { display: none; margin-left: auto; width: 2.6rem; height: 2.6rem; border: 1px solid var(--lx-line); border-radius: var(--lx-radius); background: none; cursor: pointer; position: relative; }
.lx-navtoggle__bar, .lx-navtoggle__bar::before, .lx-navtoggle__bar::after { content: ""; position: absolute; left: 50%; top: 50%; width: 1.1rem; height: 1.5px; background: var(--lx-ink); transform: translate(-50%, -50%); transition: transform 0.2s ease; }
.lx-navtoggle__bar::before { top: -6px; }
.lx-navtoggle__bar::after { top: 6px; }

@media (max-width: 860px) {
  .lx-navtoggle { display: inline-block; }
  .lx-theme { order: 3; }
  .lx-nav {
    position: fixed; inset: 4.6rem 0 auto 0; margin: 0; background: var(--lx-paper);
    border-bottom: 1px solid var(--lx-line); transform: translateY(-120%); transition: transform 0.24s ease; max-height: 80vh; overflow: auto;
  }
  .lx-nav[data-open="true"] { transform: translateY(0); }
  .lx-nav ul { flex-direction: column; gap: 0; padding: 0.5rem 0; }
  .lx-nav li { border-top: 1px solid var(--lx-line); }
  .lx-nav a { display: block; padding: 0.95rem clamp(1.1rem, 5vw, 2.5rem); }
  @media (prefers-reduced-motion: reduce) { .lx-nav { transition: none; } }
}

/* ---- lead / definitive-answer ---- */
.lx-lead { padding: clamp(2.6rem, 7vw, 5.5rem) 0 clamp(1.6rem, 4vw, 3rem); }
.lx-lead__grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: var(--lx-gap); align-items: center; }
@media (max-width: 900px) { .lx-lead__grid { grid-template-columns: 1fr; } }

/* the definitive answer box (the first-screen mechanic of this site) */
.lx-answer {
  border: 1px solid var(--lx-line-strong);
  border-left-width: 3px;
  border-radius: var(--lx-radius);
  background: var(--lx-paper);
  box-shadow: var(--lx-shadow);
  padding: clamp(1.1rem, 2.6vw, 1.6rem) clamp(1.2rem, 2.8vw, 1.7rem);
  margin: 0 0 1.4rem;
  max-width: var(--lx-readw);
}
.lx-answer__label { text-transform: uppercase; letter-spacing: 0.22em; font-size: 0.68rem; font-weight: 600; color: var(--lx-emerald-deep); margin: 0 0 0.55rem; }
.lx-answer p:last-child { margin: 0; font-size: clamp(1.04rem, 1.7vw, 1.18rem); line-height: 1.55; color: var(--lx-ink); }

/* ---- canonical reference: sticky ToC + section body ---- */
.lx-reference { display: grid; grid-template-columns: 14rem 1fr; gap: clamp(1.5rem, 4vw, 3.5rem); align-items: start; }
@media (max-width: 900px) { .lx-reference { grid-template-columns: 1fr; } }

.lx-toc { position: sticky; top: 5.6rem; align-self: start; }
.lx-toc__h { font-family: var(--lx-sans); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.16em; color: var(--lx-ink-faint); margin: 0 0 0.8rem; }
.lx-toc__list { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--lx-line); }
.lx-toc__list li { margin: 0; }
.lx-toc__list a { display: block; padding: 0.42rem 0 0.42rem 0.95rem; margin-left: -1px; border-left: 2px solid transparent; color: var(--lx-ink-soft); text-decoration: none; font-size: 0.92rem; line-height: 1.35; }
.lx-toc__list a:hover { color: var(--lx-ink); border-left-color: var(--lx-line-strong); }
.lx-toc__list a[aria-current="true"] { color: var(--lx-emerald-deep); border-left-color: var(--lx-emerald); font-weight: 600; }
@media (max-width: 900px) {
  .lx-toc { position: static; margin-bottom: 1.4rem; border: 1px solid var(--lx-line); border-radius: var(--lx-radius); padding: 1rem 1.2rem; background: var(--lx-paper); }
  .lx-toc__list { border-left: 0; display: flex; flex-wrap: wrap; gap: 0.3rem 1rem; }
  .lx-toc__list a { padding: 0.2rem 0; margin-left: 0; border-left: 0; }
  .lx-toc__list a[aria-current="true"] { border-left: 0; }
}

.lx-refbody { min-width: 0; }
.lx-sec { padding: clamp(2rem, 4.5vw, 3.4rem) 0; border-top: 1px solid var(--lx-line); scroll-margin-top: 5.6rem; }
.lx-sec:first-child { border-top: 0; padding-top: 0; }
.lx-sec h3 { margin-top: 1.8rem; }
.lx-sec p, .lx-sec ul, .lx-sec ol { line-height: 1.65; }

/* code plate on the thin model spokes */
.lx-spokeplate { max-width: 34rem; margin: 0 0 1.8rem; }

/* ---- the engraved plate ---- */
.lx-plate {
  margin: 0;
  background: var(--lx-paper);
  border: 1px solid var(--lx-line-strong);
  border-radius: var(--lx-radius);
  padding: clamp(1.4rem, 3vw, 2.1rem);
  box-shadow: var(--lx-shadow);
  position: relative;
}
.lx-plate::before {
  content: ""; position: absolute; inset: 6px; border: 1px solid var(--lx-line); border-radius: 1px; pointer-events: none;
}
.lx-plate__eyebrow { text-transform: uppercase; letter-spacing: 0.24em; font-size: 0.68rem; font-weight: 600; color: var(--lx-ink-faint); margin: 0 0 0.9rem; }
.lx-plate__engrave {
  min-height: 4.6rem; /* fixed box => zero CLS on code swap */
  display: flex; align-items: center; justify-content: center;
  border-top: 1px solid var(--lx-line); border-bottom: 1px solid var(--lx-line);
  padding: 0.7rem 0.3rem; margin-bottom: 1.1rem;
}
.lx-plate__code {
  font-family: var(--lx-serif);
  font-size: clamp(1.8rem, 5vw, 2.7rem);
  letter-spacing: 0.14em;
  color: var(--lx-ink);
  text-shadow: 0 1px 0 color-mix(in srgb, var(--lx-ivory) 60%, transparent);
  word-break: break-all;
  text-align: center;
  line-height: 1.1;
}
.lx-plate__actions { display: flex; gap: 0.7rem; flex-wrap: wrap; }
.lx-copy, .lx-open {
  flex: 1 1 auto; min-height: 3rem; display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  font-family: var(--lx-sans); font-size: 0.95rem; letter-spacing: 0.04em; border-radius: var(--lx-radius);
  padding: 0.7rem 1.1rem; text-decoration: none; cursor: pointer; white-space: nowrap;
}
.lx-copy {
  background: var(--lx-emerald); color: #fff; border: 1px solid var(--lx-emerald);
  transition: background 0.15s ease;
}
:root[data-theme="dark"] .lx-copy { color: #06130d; }
.lx-copy:hover { background: var(--lx-emerald-deep); border-color: var(--lx-emerald-deep); }
.lx-copy[data-lx-copied="true"] { background: var(--lx-emerald-deep); }
.lx-open { background: transparent; color: var(--lx-ink); border: 1px solid var(--lx-line-strong); }
.lx-open:hover { background: var(--lx-ink); color: var(--lx-ivory); }
.lx-open__arr { transition: transform 0.15s ease; }
.lx-open:hover .lx-open__arr { transform: translateX(3px); }
@media (prefers-reduced-motion: reduce) { .lx-copy, .lx-open, .lx-open__arr { transition: none; } }
.lx-plate__note { font-size: 0.86rem; color: var(--lx-ink-faint); margin: 1rem 0 0; line-height: 1.5; }

/* verified chip + byline */
.lx-chip { display: inline-flex; align-items: center; gap: 0.45rem; font-size: 0.8rem; letter-spacing: 0.03em; color: var(--lx-ink-soft); border: 1px solid var(--lx-line); border-radius: 999px; padding: 0.28rem 0.75rem; }
.lx-chip__dot { width: 0.5rem; height: 0.5rem; border-radius: 50%; background: var(--lx-emerald); flex: none; }
.lx-byline { display: flex; flex-wrap: wrap; align-items: center; gap: 0.6rem; color: var(--lx-ink-faint); font-size: 0.9rem; margin: 1.2rem 0 0; }
.lx-byline a { color: var(--lx-ink-soft); }

/* ---- sections & layout ---- */
.lx-band { padding: clamp(2.2rem, 5vw, 4rem) 0; border-top: 1px solid var(--lx-line); }
.lx-band--flush { border-top: 0; }

.lx-crumb { padding: 1.1rem 0 0.2rem; }
.lx-crumb__list { list-style: none; display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0; padding: 0; font-size: 0.82rem; color: var(--lx-ink-faint); }
.lx-crumb a { color: var(--lx-ink-faint); text-decoration: none; }
.lx-crumb a:hover { color: var(--lx-ink); }
.lx-crumb__sep { color: var(--lx-line); }

/* tables */
.lx-scrollx { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 1.4rem 0; }
.lx-table { width: 100%; border-collapse: collapse; font-size: 0.96rem; min-width: 30rem; }
.lx-table caption { text-align: left; color: var(--lx-ink-faint); font-size: 0.85rem; margin-bottom: 0.6rem; }
.lx-table th, .lx-table td { text-align: left; padding: 0.85rem 1rem; border-bottom: 1px solid var(--lx-line); vertical-align: top; }
.lx-table thead th { font-family: var(--lx-sans); font-weight: 600; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--lx-ink-faint); border-bottom: 1px solid var(--lx-line-strong); }
.lx-table tbody tr:last-child td { border-bottom: 0; }
.lx-yes { color: var(--lx-emerald-deep); font-weight: 600; }
.lx-no { color: var(--lx-ink-faint); }

/* callout / note boxes */
.lx-note { border-left: 2px solid var(--lx-emerald); background: var(--lx-emerald-tint); padding: 1rem 1.2rem; border-radius: 0 var(--lx-radius) var(--lx-radius) 0; margin: 1.6rem 0; }
.lx-note h3 { margin-top: 0; font-family: var(--lx-sans); font-size: 1rem; letter-spacing: 0.02em; }
.lx-note p:last-child { margin-bottom: 0; }
.lx-note--warn { border-left-color: var(--lx-ink); background: color-mix(in srgb, var(--lx-ink) 5%, transparent); }

/* news-post lead image (master §4 — self-hosted, explicit dimensions, zero CLS) */
.lx-postimg { margin: 1.6rem 0 2rem; max-width: var(--lx-readw); }
.lx-postimg img { display: block; width: 100%; height: auto; border: 1px solid var(--lx-line); border-radius: var(--lx-radius); background: var(--lx-paper); }
.lx-postimg figcaption { margin-top: 0.5rem; font-size: 0.8rem; color: var(--lx-ink-faint); line-height: 1.5; }
.lx-postimg figcaption a { color: inherit; }

/* estimate flag */
.lx-est { font-size: 0.82rem; color: var(--lx-ink-faint); font-style: italic; }

/* value/stat row */
.lx-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr)); gap: 1px; background: var(--lx-line); border: 1px solid var(--lx-line); border-radius: var(--lx-radius); overflow: hidden; margin: 1.8rem 0; }
.lx-stat { background: var(--lx-paper); padding: 1.4rem 1.2rem; }
.lx-stat__n { font-family: var(--lx-serif); font-size: clamp(1.8rem, 4vw, 2.6rem); line-height: 1; display: block; }
.lx-stat__l { font-size: 0.82rem; color: var(--lx-ink-faint); margin-top: 0.5rem; display: block; letter-spacing: 0.02em; }

/* steps */
.lx-steps { list-style: none; counter-reset: step; padding: 0; margin: 1.6rem 0; }
.lx-steps > li { counter-increment: step; position: relative; padding: 0 0 1.6rem 3.2rem; }
.lx-steps > li::before { content: counter(step); position: absolute; left: 0; top: -0.1rem; width: 2.2rem; height: 2.2rem; display: grid; place-items: center; font-family: var(--lx-serif); font-size: 1.1rem; color: var(--lx-emerald-deep); border: 1px solid var(--lx-line-strong); border-radius: 50%; }
.lx-steps > li:not(:last-child)::after { content: ""; position: absolute; left: 1.1rem; top: 2.4rem; bottom: 0.2rem; width: 1px; background: var(--lx-line); }
.lx-steps h3 { margin: 0.1rem 0 0.4rem; }

/* faq / details */
.lx-faq { border-top: 1px solid var(--lx-line); max-width: var(--lx-readw); }
.lx-faq__item { border-bottom: 1px solid var(--lx-line); }
.lx-faq__q { cursor: pointer; list-style: none; padding: 1.1rem 2rem 1.1rem 0; font-size: 1.08rem; position: relative; font-family: var(--lx-serif); }
.lx-faq__q::-webkit-details-marker { display: none; }
.lx-faq__q::after { content: "+"; position: absolute; right: 0; top: 1rem; font-family: var(--lx-sans); font-size: 1.3rem; color: var(--lx-emerald-deep); }
.lx-faq__item[open] .lx-faq__q::after { content: "\2212"; }
.lx-faq__a { padding: 0 0 1.2rem; color: var(--lx-ink-soft); max-width: 40rem; }
.lx-faq__a p:first-child { margin-top: 0; }

/* card grids (models, blog, links) */
.lx-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr)); gap: 1.2rem; margin: 1.8rem 0; }
.lx-tile { border: 1px solid var(--lx-line); border-radius: var(--lx-radius); padding: 1.4rem; background: var(--lx-paper); display: flex; flex-direction: column; }
.lx-tile h3 { font-family: var(--lx-serif); }
.lx-tile__meta { font-size: 0.8rem; color: var(--lx-ink-faint); letter-spacing: 0.04em; text-transform: uppercase; margin-bottom: 0.6rem; }
.lx-tile__more { margin-top: auto; padding-top: 0.9rem; font-size: 0.92rem; }
.lx-tile a { text-decoration: none; }
.lx-tile a:hover { text-decoration: underline; }

/* related / internal-link strip */
.lx-related { display: flex; flex-wrap: wrap; gap: 0.7rem; margin: 1.6rem 0; }
.lx-related a { border: 1px solid var(--lx-line); border-radius: 999px; padding: 0.5rem 1rem; font-size: 0.9rem; text-decoration: none; color: var(--lx-ink-soft); }
.lx-related a:hover { border-color: var(--lx-line-strong); color: var(--lx-ink); }

/* disclosure */
.lx-disclose { font-size: 0.85rem; color: var(--lx-ink-faint); border: 1px solid var(--lx-line); border-radius: var(--lx-radius); padding: 1rem 1.2rem; margin: 1.8rem 0 0; max-width: 46rem; line-height: 1.55; }

/* footer */
.lx-foot { border-top: 1px solid var(--lx-line-strong); margin-top: clamp(3rem, 7vw, 6rem); padding: clamp(2.4rem, 5vw, 3.6rem) 0 2rem; background: var(--lx-paper); }
.lx-foot__grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: var(--lx-gap); }
@media (max-width: 900px) { .lx-foot__grid { grid-template-columns: 1fr 1fr; gap: 2rem; } }
@media (max-width: 560px) { .lx-foot__grid { grid-template-columns: 1fr; } }
.lx-foot__h { font-family: var(--lx-sans); font-size: 0.76rem; text-transform: uppercase; letter-spacing: 0.16em; color: var(--lx-ink-faint); margin: 0 0 0.9rem; }
.lx-foot__col ul { list-style: none; margin: 0; padding: 0; }
.lx-foot__col li { margin-bottom: 0.55rem; }
.lx-foot__col a { color: var(--lx-ink-soft); text-decoration: none; font-size: 0.94rem; }
.lx-foot__col a:hover { color: var(--lx-ink); }
.lx-brand--foot { margin-bottom: 0.9rem; }
.lx-foot__tag { color: var(--lx-ink-faint); font-size: 0.9rem; max-width: 22rem; margin: 0; }
.lx-foot__legal { margin-top: 2.4rem; padding-top: 1.4rem; border-top: 1px solid var(--lx-line); }
.lx-foot__legal p { color: var(--lx-ink-faint); font-size: 0.8rem; margin: 0; max-width: 52rem; line-height: 1.55; }

/* 404 */
.lx-404 { text-align: center; padding: clamp(3rem, 12vw, 8rem) 0; }
.lx-404 .lx-h1 { font-size: clamp(3rem, 12vw, 7rem); }

/* utilities */
.lx-center { text-align: center; }
.lx-mt { margin-top: 2rem; }
.lx-measure { max-width: var(--lx-readw); }
.lx-visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }