/* Monitor Selector. One stylesheet, no framework.
   Order: tokens, base, header, hero, selector, result, blocks, article, tables and figures, footer. */

:root {
  --paper: #faf8f3;
  --surface: #ffffff;
  --sunk: #f1eee6;
  --ink: #15181c;
  --mut: #5d646c;
  --line: #dcd7cc;
  --acc: #fbbf0d;
  --acc-ink: #8a5a00;
  --on-acc: #15181c;
  --ok: #1a7f4b;
  --warn: #a4460b;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --serif: Charter, "Bitstream Charter", "Sitka Text", Cambria, Georgia, serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", "Segoe UI Mono", Consolas, "Liberation Mono", monospace;
  --wrap: 72rem;
  --r: 6px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0f1419; --surface: #161c23; --sunk: #0b0f13; --ink: #e9ebee; --mut: #9aa3ad; --line: #2a323c;
    --acc-ink: #fbbf0d; --ok: #4cc38a; --warn: #f0a26b; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #0f1419; --surface: #161c23; --sunk: #0b0f13; --ink: #e9ebee; --mut: #9aa3ad; --line: #2a323c;
  --acc-ink: #fbbf0d; --ok: #4cc38a; --warn: #f0a26b; color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; scroll-padding-top: 5rem; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.55 var(--sans); }
img, svg { max-width: 100%; height: auto; }
a { color: inherit; text-decoration-color: var(--acc); text-decoration-thickness: 2px; text-underline-offset: 3px; }
a:hover { text-decoration-color: currentColor; }
:focus-visible { outline: 2px solid var(--acc-ink); outline-offset: 2px; border-radius: 2px; }
h1, h2, h3 { line-height: 1.15; letter-spacing: -0.015em; margin: 0; font-weight: 680; text-wrap: balance; }
p { margin: 0 0 1em; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 1.25rem; }
.small { font-size: 0.85rem; }
.muted { color: var(--mut); }
.eyebrow { font: 600 0.74rem/1.3 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--mut); margin: 0 0 0.75rem; }
.skip { position: absolute; left: -999px; top: 0; background: var(--ink); color: var(--paper); padding: 0.5rem 1rem; z-index: 50; }
.skip:focus { left: 0; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; padding: 0.7rem 1.15rem; border: 1.5px solid var(--ink); border-radius: var(--r);
  font: 600 0.95rem/1.2 var(--sans); text-decoration: none; cursor: pointer; background: transparent; color: var(--ink); }
.btn.primary { background: var(--acc); border-color: var(--acc); color: var(--on-acc); }
.btn.primary:hover { filter: brightness(0.94); }
.btn.ghost:hover { background: var(--ink); color: var(--paper); }
.btn.small { padding: 0.4rem 0.7rem; font-size: 0.82rem; }
button.link { background: none; border: 0; padding: 0; font: inherit; color: inherit; text-decoration: underline; text-decoration-color: var(--acc); cursor: pointer; }
.more { font-weight: 600; text-decoration: none; border-bottom: 2px solid var(--acc); padding-bottom: 1px; }
.more::after { content: " →"; }

/* Header */
.top { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--paper) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.top-in { display: flex; align-items: center; gap: 1.5rem; min-height: 3.5rem; }
.brand { display: inline-flex; align-items: center; gap: 0.55rem; text-decoration: none; font: 500 1.05rem/1 var(--sans); letter-spacing: -0.01em; white-space: nowrap; }
.brand b { font-weight: 750; }
.mainnav { display: flex; gap: 0.25rem; margin-left: auto; }
.mainnav a { padding: 0.45rem 0.7rem; border-radius: var(--r); text-decoration: none; font-size: 0.92rem; color: var(--mut); white-space: nowrap; }
.mainnav a:hover { color: var(--ink); background: var(--sunk); }
.mainnav a[aria-current] { color: var(--ink); box-shadow: inset 0 -2px 0 var(--acc); border-radius: 0; }
.top-tools { display: flex; align-items: center; gap: 0.35rem; }
.theme { display: grid; place-items: center; width: 2.2rem; height: 2.2rem; border: 0; border-radius: var(--r); background: none; color: var(--mut); cursor: pointer; }
.theme:hover { color: var(--ink); background: var(--sunk); }
.menu { position: relative; }
.menu summary { list-style: none; display: flex; align-items: center; gap: 0.4rem; padding: 0.45rem 0.6rem; border-radius: var(--r); cursor: pointer; font: 600 0.78rem/1 var(--mono); color: var(--mut); }
.menu summary::-webkit-details-marker { display: none; }
.menu summary:hover, .menu[open] summary { color: var(--ink); background: var(--sunk); }
.menu ul { position: absolute; right: 0; top: calc(100% + 0.4rem); min-width: 12.5rem; margin: 0; padding: 0.35rem; list-style: none; background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); box-shadow: 0 12px 32px rgb(0 0 0 / 0.14); }
.menu li a { display: flex; align-items: center; gap: 0.6rem; padding: 0.5rem 0.6rem; border-radius: 4px; text-decoration: none; font-size: 0.92rem; }
.menu li a:hover { background: var(--sunk); }
.menu li a[aria-current] { font-weight: 700; }
.burger { display: none; }
@media (max-width: 62rem) {
  .mainnav { display: none; }
  .top-tools { margin-left: auto; }
  .burger { display: block; }
}

/* Hero */
.hero { padding-top: clamp(2.5rem, 6vw, 4.5rem); padding-bottom: clamp(1.5rem, 3vw, 2.5rem); }
.hero h1, .article-head h1 { font-size: clamp(2.1rem, 5.2vw, 3.6rem); max-width: 21ch; letter-spacing: -0.03em; }
.lead { font: 400 clamp(1.1rem, 1.6vw, 1.3rem)/1.55 var(--serif); color: var(--mut); max-width: 62ch; margin: 1.1rem 0 0; }

/* Selector */
.selector { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); border: 1px solid var(--line); border-radius: calc(var(--r) * 2); background: var(--surface); overflow: hidden; margin-bottom: 2rem; }
.sel-form { padding: 1.5rem; border-right: 1px solid var(--line); background: var(--sunk); }
.sel-title { font-size: 1.15rem; margin-bottom: 1.25rem; }
fieldset { border: 0; margin: 0 0 1.35rem; padding: 0; min-width: 0; }
legend { padding: 0; margin-bottom: 0.6rem; font-weight: 650; font-size: 0.95rem; display: flex; align-items: center; gap: 0.55rem; }
.step { display: inline-grid; place-items: center; width: 1.45rem; height: 1.45rem; border-radius: 50%; border: 1.5px solid var(--ink); font: 700 0.72rem/1 var(--mono); }
.chips { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.chips.small { margin: 0.2rem 0 1rem; }
.chip { position: relative; cursor: pointer; }
.chip input { position: absolute; opacity: 0; inset: 0; cursor: pointer; }
.chip span { display: block; padding: 0.48rem 0.8rem; border: 1px solid var(--line); border-radius: 999px; background: var(--surface); font-size: 0.88rem; line-height: 1.2; transition: background 0.12s, color 0.12s; }
.chip:hover span { border-color: var(--ink); }
.chip input:checked + span { background: var(--ink); border-color: var(--ink); color: var(--paper); font-weight: 600; }
.chip input:focus-visible + span { outline: 2px solid var(--acc-ink); outline-offset: 2px; }
.range { display: grid; grid-template-columns: 1fr auto; gap: 0.15rem 1rem; align-items: baseline; margin-bottom: 0.6rem; }
.range label { font-size: 0.9rem; color: var(--mut); }
.range output { font: 600 0.95rem/1 var(--mono); }
.range input { grid-column: 1 / -1; width: 100%; accent-color: var(--ink); margin: 0.35rem 0 0; }
.hint { grid-column: 1 / -1; font-size: 0.8rem; color: var(--mut); margin: 0.3rem 0 0; }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.js .sel-form [data-submit] { display: none; }
.sel-result { padding: 1.5rem; min-width: 0; transition: opacity 0.15s; }
.sel-result.loading { opacity: 0.45; }

/* Result */
.pick-head { position: relative; padding-right: 5rem; }
.pick-title { font-size: clamp(2rem, 4.2vw, 3rem); letter-spacing: -0.03em; display: flex; flex-wrap: wrap; align-items: baseline; gap: 0 0.6rem; }
.pick-size { font-family: var(--mono); font-weight: 700; letter-spacing: -0.06em; }
.pick-name { font-weight: 600; }
.times { font: 600 0.6em var(--mono); color: var(--mut); }
.pick-res { font: 500 0.92rem/1.4 var(--mono); color: var(--mut); margin: 0.4rem 0 0; }
.score { display: inline-grid; place-items: center; min-width: 2.3rem; height: 2.3rem; padding: 0 0.4rem; border-radius: 999px; border: 2px solid var(--acc); font: 700 0.92rem/1 var(--mono); }
.score.big { position: absolute; right: 0; top: 0; width: 4.2rem; height: 4.2rem; font-size: 1.5rem; display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 1px; border-width: 3px; }
.score.big small { font-size: 0.6rem; color: var(--mut); font-weight: 500; }
.pick-why { font: 400 1.02rem/1.6 var(--serif); margin: 1.1rem 0 1.25rem; max-width: 62ch; }
.pick-body { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: 1.5rem; align-items: start; }
.pick-diagram { border: 1px solid var(--line); border-radius: var(--r); background: var(--paper); padding: 0.5rem; }
.metrics { margin: 0; display: grid; gap: 0.85rem; }
.metrics > div { display: grid; grid-template-columns: 7.4rem 1fr; gap: 0.6rem; }
.metrics dt { font-size: 0.82rem; color: var(--mut); padding-top: 0.12rem; }
.metrics dd { margin: 0; display: grid; gap: 0.25rem; }
.metrics dd b { font: 700 1rem/1.2 var(--mono); }
.metrics dd small { font-size: 0.78rem; color: var(--mut); line-height: 1.35; }
.help { display: inline-grid; place-items: center; width: 1.05rem; height: 1.05rem; border-radius: 50%; border: 1px solid var(--line); font: 600 0.65rem/1 var(--mono); text-decoration: none; color: var(--mut); vertical-align: 1px; }
.help:hover { border-color: var(--ink); color: var(--ink); }
.gauge { position: relative; display: block; height: 8px; border-radius: 4px; background: var(--sunk); border: 1px solid var(--line); }
.gauge-zone { position: absolute; top: -1px; bottom: -1px; background: color-mix(in srgb, var(--ok) 38%, transparent); border-radius: 4px; }
.gauge-mark { position: absolute; top: -5px; width: 4px; height: 16px; margin-left: -2px; background: var(--ink); border-radius: 2px; box-shadow: 0 0 0 2px var(--surface); }
.warnings { list-style: none; margin: 1.25rem 0 0; padding: 0; display: grid; gap: 0.5rem; }
.warnings li { padding: 0.65rem 0.85rem 0.65rem 2.3rem; border: 1px solid color-mix(in srgb, var(--warn) 45%, var(--line)); border-radius: var(--r); font-size: 0.9rem; position: relative; }
.warnings li::before { content: "!"; position: absolute; left: 0.75rem; top: 0.68rem; width: 1.05rem; height: 1.05rem; border-radius: 50%; background: var(--warn); color: var(--surface); font: 700 0.72rem/1.05rem var(--mono); text-align: center; }
.alts { list-style: none; margin: 1.25rem 0 0; padding: 0; border-top: 1px solid var(--line); }
.alt { display: flex; align-items: center; gap: 0.85rem; padding: 0.85rem 0; border-bottom: 1px solid var(--line); }
.alt > div { flex: 1; min-width: 0; display: grid; gap: 0.1rem; }
.alt-tag { font: 600 0.68rem/1.3 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--acc-ink); }
.alt-specs { font: 400 0.78rem/1.4 var(--mono); color: var(--mut); }
.ranking { margin-top: 1rem; }
.ranking summary { cursor: pointer; font-weight: 600; font-size: 0.92rem; padding: 0.4rem 0; }
.bar { display: inline-block; width: 4.5rem; height: 6px; border-radius: 3px; background: linear-gradient(to right, var(--acc) var(--v), var(--sunk) var(--v)); vertical-align: middle; margin-right: 0.3rem; }
@media (max-width: 62rem) {
  .selector { grid-template-columns: 1fr; }
  .sel-form { border-right: 0; border-bottom: 1px solid var(--line); }
}
@media (max-width: 40rem) {
  .pick-body, .two { grid-template-columns: 1fr; }
  .sel-form, .sel-result { padding: 1.1rem; }
  .alt { flex-wrap: wrap; }
}

/* Sponsor card */
.sponsor-card { margin: 2rem 0; }
.sponsor-label { display: block; font: 600 0.68rem/1.3 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--mut); margin-bottom: 0.4rem; }
.sponsor-card a { display: flex; align-items: center; gap: 1rem; padding: 1rem 1.25rem; border: 1px dashed var(--line); border-radius: var(--r); text-decoration: none; background: var(--surface); }
.sponsor-card a:hover { border-color: var(--ink); border-style: solid; }
.sponsor-body { display: flex; flex-direction: column; flex: 1; gap: 0.15rem; }
.sponsor-body span { color: var(--mut); font-size: 0.9rem; }
.sponsor-card .btn { flex-shrink: 0; }
@media (max-width: 40rem) { .sponsor-card a { flex-direction: column; align-items: flex-start; } }

/* Blocks of the home page and the hub */
.block { padding-top: clamp(2.5rem, 6vw, 4.5rem); }
.block-head { max-width: 46rem; margin-bottom: 1.75rem; }
.block-head h2 { font-size: clamp(1.6rem, 3.2vw, 2.3rem); letter-spacing: -0.025em; }
.block-head h2 a { text-decoration: none; }
.block-head p:last-child { font: 400 1.08rem/1.6 var(--serif); color: var(--mut); margin: 0.8rem 0 0; }
.principles { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; border-top: 2px solid var(--ink); }
.principles li { padding: 1.5rem 1.5rem 1.5rem 0; border-right: 1px solid var(--line); display: flex; flex-direction: column; }
.principles li + li { padding-left: 1.5rem; }
.principles li:last-child { border-right: 0; padding-right: 0; }
.principle-n { font: 700 2.6rem/1 var(--mono); color: var(--acc-ink); letter-spacing: -0.05em; }
.principles h3 { font-size: 1.2rem; margin: 0.9rem 0 0.6rem; }
.principles p { font: 400 1rem/1.6 var(--serif); color: var(--mut); }
.formula { font: 500 0.86rem/1.5 var(--mono) !important; color: var(--ink) !important; background: var(--sunk); border-left: 3px solid var(--acc); padding: 0.55rem 0.75rem; margin-top: auto; overflow-x: auto; white-space: nowrap; }
.principles .more { margin-top: 1rem; align-self: flex-start; }
@media (max-width: 54rem) {
  .principles { grid-template-columns: 1fr; }
  .principles li, .principles li + li { padding: 1.5rem 0; border-right: 0; border-bottom: 1px solid var(--line); }
}
.chapters { list-style: none; margin: 0; padding: 0; border-top: 2px solid var(--ink); }
.chapters a { display: grid; grid-template-columns: 3.2rem minmax(0, 17rem) minmax(0, 1fr) auto; gap: 0.2rem 1.25rem; align-items: baseline; padding: 1rem 0.5rem 1rem 0; border-bottom: 1px solid var(--line); text-decoration: none; }
.chapters a:hover { background: var(--surface); }
.chapters a:hover .ch-t { text-decoration: underline; text-decoration-color: var(--acc); text-decoration-thickness: 2px; text-underline-offset: 3px; }
.ch-n { font: 700 0.95rem/1.4 var(--mono); color: var(--acc-ink); padding-left: 0.5rem; }
.ch-t { font-weight: 650; font-size: 1.08rem; line-height: 1.3; }
.ch-d { color: var(--mut); font: 400 0.98rem/1.5 var(--serif); }
.ch-m { font: 500 0.75rem/1.4 var(--mono); color: var(--mut); white-space: nowrap; }
@media (max-width: 54rem) {
  .chapters a { grid-template-columns: 2.6rem 1fr; }
  .ch-d, .ch-m { grid-column: 2; }
}
.guides { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(17rem, 1fr)); gap: 0.85rem; }
.guides a { display: flex; flex-direction: column; gap: 0.4rem; height: 100%; padding: 1.1rem 1.2rem; border: 1px solid var(--line); border-radius: var(--r); background: var(--surface); text-decoration: none; }
.guides a:hover { border-color: var(--ink); }
.guides strong { font-size: 1.02rem; line-height: 1.3; }
.guides strong::after { content: " →"; color: var(--acc-ink); }
.guides span { color: var(--mut); font-size: 0.9rem; line-height: 1.5; }
.prose-block .prose { max-width: 44rem; }

/* FAQ */
.faq { border-top: 1px solid var(--line); max-width: 50rem; margin-bottom: 1.5rem; }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; list-style: none; padding: 1rem 2.2rem 1rem 0; font-weight: 620; font-size: 1.04rem; line-height: 1.4; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 0.3rem; top: 0.8rem; font: 400 1.4rem/1 var(--mono); color: var(--acc-ink); }
.faq details[open] summary::after { content: "−"; }
.faq-a { font: 400 1.02rem/1.65 var(--serif); color: var(--mut); padding: 0 2.2rem 1.1rem 0; }
.faq-a p:last-child { margin-bottom: 0; }

/* Articles */
.article-head { padding-top: clamp(1.75rem, 4vw, 3rem); padding-bottom: clamp(1.5rem, 3vw, 2.5rem); }
.crumbs { display: flex; flex-wrap: wrap; gap: 0.4rem; font-size: 0.82rem; color: var(--mut); margin-bottom: 1.5rem; }
.crumbs a { text-decoration: none; }
.crumbs a:hover { color: var(--ink); text-decoration: underline; }
.crumbs a::after { content: "/"; margin-left: 0.4rem; color: var(--line); }
.meta { font: 500 0.78rem/1.4 var(--mono); color: var(--mut); margin: 1.25rem 0 0; }
.article-grid { display: grid; grid-template-columns: 14rem minmax(0, 46rem); gap: 3.5rem; align-items: start; padding-bottom: 2rem; border-top: 1px solid var(--line); padding-top: 2.25rem; }
.article-grid.single { grid-template-columns: minmax(0, 46rem); }
.article-toc { position: sticky; top: 5rem; max-height: calc(100vh - 6rem); overflow: auto; }
.article-toc ol { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--line); }
.article-toc a { display: block; padding: 0.32rem 0 0.32rem 0.9rem; margin-left: -1px; border-left: 2px solid transparent; text-decoration: none; font-size: 0.86rem; line-height: 1.35; color: var(--mut); }
.article-toc a:hover { color: var(--ink); }
.article-toc a.on { color: var(--ink); border-left-color: var(--acc); font-weight: 600; }
@media (max-width: 62rem) {
  .article-grid { grid-template-columns: minmax(0, 1fr); gap: 1.5rem; }
  .article-toc { position: static; max-height: none; border: 1px solid var(--line); border-radius: var(--r); padding: 1rem 1.1rem; background: var(--surface); }
}
.takeaways { border: 1px solid var(--line); border-left: 4px solid var(--acc); border-radius: var(--r); background: var(--surface); padding: 1.2rem 1.4rem; margin-bottom: 2.25rem; }
.takeaways h2 { font: 600 0.74rem/1.3 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--mut); margin-bottom: 0.7rem; }
.takeaways ul { margin: 0; padding-left: 1.1rem; display: grid; gap: 0.45rem; font-size: 0.98rem; }
.prose { font: 400 1.12rem/1.72 var(--serif); }
.prose > :first-child { margin-top: 0; }
.prose h2 { font: 680 1.65rem/1.2 var(--sans); letter-spacing: -0.02em; margin: 2.6rem 0 0.9rem; padding-top: 1.4rem; border-top: 1px solid var(--line); }
.prose h3 { font: 650 1.2rem/1.3 var(--sans); margin: 1.9rem 0 0.6rem; }
.prose p, .prose ul, .prose ol { margin: 0 0 1.15em; }
.prose ul, .prose ol { padding-left: 1.3rem; }
.prose li { margin-bottom: 0.4em; }
.prose strong { font-weight: 700; }
.prose code, .prose .f { font: 500 0.9em var(--mono); background: var(--sunk); padding: 0.1em 0.35em; border-radius: 3px; white-space: nowrap; }
.prose .formula { display: block; margin: 1.4rem 0; font-size: 0.95rem !important; padding: 0.85rem 1rem; }
.prose .note { font: 400 0.95rem/1.6 var(--sans); border: 1px solid var(--line); border-radius: var(--r); background: var(--surface); padding: 0.95rem 1.15rem; margin: 1.6rem 0; }
.prose .note strong:first-child { font: 600 0.74rem/1.3 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--acc-ink); display: block; margin-bottom: 0.35rem; }
.prose .sources { font: 400 0.88rem/1.55 var(--sans); color: var(--mut); }
.prose .sources li { margin-bottom: 0.3em; }
.article-faq { margin-top: 2.75rem; }
.article-faq h2 { font-size: 1.65rem; margin-bottom: 1rem; }
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 0.85rem; margin: 3rem 0 1rem; }
.pager a { display: flex; flex-direction: column; gap: 0.3rem; padding: 1rem 1.2rem; border: 1px solid var(--line); border-radius: var(--r); text-decoration: none; background: var(--surface); }
.pager a:hover { border-color: var(--ink); }
.pager span { font: 600 0.7rem/1.3 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--mut); }
.pager .next { text-align: right; }
.related { margin-top: 3rem; }
.related h2 { font-size: 1.4rem; margin-bottom: 1rem; }
.glossary { margin: 0; display: grid; gap: 0; border-top: 1px solid var(--line); }
.glossary > div { display: grid; grid-template-columns: 12rem 1fr; gap: 1.25rem; padding: 1rem 0; border-bottom: 1px solid var(--line); scroll-margin-top: 5rem; }
.glossary dt { font-weight: 680; }
.glossary dd { margin: 0; font: 400 1.02rem/1.6 var(--serif); color: var(--mut); }
@media (max-width: 40rem) { .glossary > div { grid-template-columns: 1fr; gap: 0.3rem; } .pager { grid-template-columns: 1fr; } }

/* Calculator */
.calc { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 0; border: 1px solid var(--line); border-radius: calc(var(--r) * 2); overflow: hidden; background: var(--surface); margin-bottom: 2.5rem; }
.calc form { padding: 1.5rem; background: var(--sunk); border-right: 1px solid var(--line); }
.calc-fields { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.calc label { display: grid; gap: 0.35rem; font-size: 0.88rem; color: var(--mut); }
.unit { display: flex; align-items: center; gap: 0.4rem; font: 500 0.9rem var(--mono); color: var(--mut); }
.calc input { width: 100%; padding: 0.6rem 0.7rem; border: 1px solid var(--line); border-radius: var(--r); background: var(--surface); color: var(--ink); font: 600 1.05rem var(--mono); }
.presets { display: flex; flex-wrap: wrap; gap: 0.35rem; align-items: center; margin: 1.25rem 0; font-size: 0.82rem; color: var(--mut); }
.presets span { width: 100%; }
.chip-btn { border: 1px solid var(--line); background: var(--surface); color: var(--ink); border-radius: 999px; padding: 0.3rem 0.65rem; font: 500 0.78rem var(--sans); cursor: pointer; }
.chip-btn:hover { border-color: var(--ink); }
.js .calc [data-submit] { display: none; }
.calc-out { margin: 0; padding: 0.5rem 1.5rem; display: grid; grid-template-columns: 1fr 1fr; gap: 0 2rem; }
.calc-out > div { padding: 0.9rem 0; border-bottom: 1px solid var(--line); }
.calc-out dt { font-size: 0.8rem; color: var(--mut); }
.calc-out dd { margin: 0.2rem 0 0; display: grid; gap: 0.15rem; }
.calc-out b { font: 700 1.35rem/1.2 var(--mono); letter-spacing: -0.03em; }
.calc-out small { font-size: 0.76rem; color: var(--mut); line-height: 1.35; }
@media (max-width: 54rem) { .calc { grid-template-columns: 1fr; } .calc form { border-right: 0; border-bottom: 1px solid var(--line); } }
@media (max-width: 30rem) { .calc-out, .calc-fields { grid-template-columns: 1fr; } }

/* Tables */
.table-wrap { overflow-x: auto; margin: 1.75rem 0; border: 1px solid var(--line); border-radius: var(--r); background: var(--surface); }
table { border-collapse: collapse; width: 100%; font: 400 0.88rem/1.4 var(--sans); }
caption { caption-side: bottom; text-align: left; padding: 0.7rem 0.9rem; font-size: 0.8rem; color: var(--mut); border-top: 1px solid var(--line); }
th, td { padding: 0.55rem 0.9rem; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
tbody tr:last-child th, tbody tr:last-child td { border-bottom: 0; }
thead th { font: 600 0.72rem/1.3 var(--mono); letter-spacing: 0.05em; text-transform: uppercase; color: var(--mut); background: var(--sunk); white-space: nowrap; }
tbody th { font-weight: 620; white-space: nowrap; }
table.data td { font-family: var(--mono); font-size: 0.84rem; white-space: nowrap; }
table.compact th, table.compact td { padding: 0.4rem 0.7rem; }
td .ok { color: var(--ok); font-weight: 700; }
td .low { color: var(--warn); }

/* Figures */
.fig { margin: 2rem 0; padding: 1.1rem 1.1rem 0; border: 1px solid var(--line); border-radius: var(--r); background: var(--surface); }
.fig svg, svg.setup { display: block; width: 100%; height: auto; }
figcaption { font: 400 0.84rem/1.5 var(--sans); color: var(--mut); padding: 0.8rem 0 0.9rem; border-top: 1px solid var(--line); margin-top: 0.8rem; }
figcaption b { font: 700 0.78rem var(--mono); color: var(--ink); }
svg .ink { stroke: var(--ink); stroke-width: 1.5; fill: none; }
svg rect.ink { fill: none; }
svg .mut { stroke: var(--mut); stroke-width: 1; fill: none; }
svg .acc { stroke: var(--acc-ink); stroke-width: 1.5; fill: none; }
svg .thick { stroke-width: 3; }
svg .dash { stroke-dasharray: 5 4; }
svg .fill { fill: var(--ink); stroke: none; }
svg .nofill { fill: none; }
svg .accfill { fill: var(--acc); stroke: none; }
svg .cell { fill: var(--sunk); stroke: var(--line); }
svg .grid { stroke: var(--line); stroke-width: 1; }
svg .lbl { font: 500 12.5px var(--sans); fill: var(--ink); stroke: none; }
svg .num { font-family: var(--mono); }
svg .strong { font-weight: 700; }
svg .mut-t { fill: var(--mut); }
svg .acc-t { fill: var(--acc-ink); }
svg .onacc { fill: var(--on-acc); font-weight: 600; }
svg .cone { stroke: none; fill: var(--acc); }
svg .cone.a1 { fill-opacity: 0.42; } svg .cone.a2 { fill-opacity: 0.28; } svg .cone.a3 { fill-opacity: 0.18; } svg .cone.a4 { fill-opacity: 0.1; }
svg .outline { fill: var(--surface); stroke: var(--ink); stroke-width: 1.5; }
svg .outline.o1 { fill: color-mix(in srgb, var(--acc) 55%, var(--surface)); }
svg .outline.o2 { fill: color-mix(in srgb, var(--acc) 30%, var(--surface)); }
svg .outline.o3 { fill: color-mix(in srgb, var(--acc) 14%, var(--surface)); }
svg .outline.o4 { fill: var(--sunk); }
svg .outline.o5 { fill: var(--surface); stroke-dasharray: 5 4; }
svg .sample { font-family: var(--serif); font-weight: 700; fill: var(--ink); }
svg .panelbg { fill: #0b0f13; stroke: none; }
svg .bar { fill: var(--ink); stroke: none; }
svg .bar2 { fill: var(--mut); fill-opacity: 0.55; stroke: none; }
svg .locus { fill: var(--sunk); stroke: var(--mut); stroke-width: 1; }
svg .gam { fill: none; stroke-width: 2; }
svg .gam.g1 { stroke: var(--ink); }
svg .gam.g2 { stroke: var(--acc-ink); }
svg .gam.g3 { stroke: var(--ok); stroke-dasharray: 6 3; }
svg .gam.g4 { stroke: var(--mut); stroke-dasharray: 2 3; }
svg .desk { fill: var(--sunk); stroke: var(--line); }

/* Footer */
.foot { margin-top: clamp(3rem, 8vw, 6rem); border-top: 2px solid var(--ink); background: var(--surface); padding-top: 2.5rem; font-size: 0.9rem; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1.3fr 1.2fr 0.8fr; gap: 2.5rem; }
.foot h2 { font: 600 0.74rem/1.3 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--mut); margin: 0 0 0.8rem; }
.foot h2 a { text-decoration: none; }
.foot ul + h2 { margin-top: 1.6rem; }
.foot ul, .foot ol { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.4rem; }
.foot ol { counter-reset: ch; }
.foot ol li { counter-increment: ch; display: flex; gap: 0.6rem; }
.foot ol li::before { content: counter(ch, decimal-leading-zero); font: 600 0.75rem/1.6 var(--mono); color: var(--acc-ink); }
.foot li a { text-decoration: none; color: var(--mut); }
.foot li a:hover { color: var(--ink); text-decoration: underline; }
.foot-about p { color: var(--mut); margin: 1rem 0 0; max-width: 30ch; }
.foot-end { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin-top: 2.5rem; padding-top: 1.1rem; padding-bottom: 1.5rem; border-top: 1px solid var(--line); font: 500 0.76rem/1.4 var(--mono); color: var(--mut); }
@media (max-width: 54rem) { .foot-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 34rem) { .foot-grid { grid-template-columns: 1fr; } }

@media print {
  .top, .foot, .sel-form, .sponsor-card, .article-toc, .pager { display: none; }
  body { background: #fff; }
}