/* SPECCUE — design system
   Layout skeleton reference: dense filterable index table (theindex.website).
   Palette, type system and rule work are original to this site. */

:root {
  color-scheme: light;

  --ground:      #f1f0ec;
  --panel:       #e8e6e0;
  --panel-2:     #fbfaf8;
  --ink:         #15171a;
  --ink-2:       #4a4e52;
  --ink-3:       #7c8085;
  --rule:        #cfccc4;
  --rule-hard:   #a29d92;
  --signal:      #b3421c;
  --signal-tint: #f7e9e2;
  --verify:      #2e5e4e;

  --mono: ui-monospace, "Cascadia Mono", "Segoe UI Mono", "Roboto Mono", Menlo, Consolas, monospace;
  --prose: Georgia, "Iowan Old Style", "Times New Roman", serif;

  --gut: 1.25rem;
  --shell: 1180px;
}

*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 15px;
  line-height: 1.55;
}

a { color: var(--ink); text-underline-offset: 2px; }
a:hover { color: var(--signal); }

.shell { max-width: var(--shell); margin: 0 auto; padding: 0 var(--gut); }

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--ink); color: var(--ground);
  padding: .6rem 1rem; z-index: 20;
}
.skip:focus { left: 0; }

/* ---------- top bar ---------- */

.topbar {
  border-bottom: 1px solid var(--rule-hard);
  background: var(--ground);
}
.topbar__in {
  display: flex; align-items: stretch; justify-content: space-between;
  gap: 1rem; min-height: 46px;
}
.wordmark {
  display: inline-flex; align-items: center;
  font-weight: 700; letter-spacing: .18em; text-transform: uppercase;
  font-size: .92rem; text-decoration: none; white-space: nowrap;
}
.wordmark span { color: var(--signal); }

.nav { display: flex; align-items: stretch; gap: 0; flex-wrap: wrap; }
.nav a {
  display: inline-flex; align-items: center;
  padding: 0 .85rem; min-height: 46px;
  font-size: .74rem; letter-spacing: .1em; text-transform: uppercase;
  text-decoration: none; color: var(--ink-2);
  border-left: 1px solid var(--rule);
}
.nav a:hover, .nav a[aria-current="page"] { color: var(--signal); background: var(--panel-2); }
.nav__lang {
  display: inline-flex; align-items: center;
  padding: 0 .85rem; min-height: 46px;
  font-size: .72rem; letter-spacing: .12em; font-weight: 700;
  text-decoration: none; color: var(--signal);
  border-left: 1px solid var(--rule);
}
.nav__lang:hover { background: var(--signal); color: var(--ground); }
@media (max-width: 46rem) {
  .nav__lang { border-left: 0; border-right: 1px solid var(--rule); min-height: 44px; padding: 0 .7rem; }
}

/* ---------- spec strip (homepage conversion band) ---------- */

.specstrip {
  border-bottom: 1px solid var(--rule-hard);
  background: var(--panel-2);
}
.specstrip__in {
  display: grid;
  grid-template-columns: minmax(0,1.05fr) minmax(0,1fr) minmax(0,1.15fr);
}
.specstrip__cell {
  padding: .7rem 1.15rem .75rem;
  border-left: 1px solid var(--rule);
  min-width: 0;
}
.specstrip__cell:first-child { border-left: 0; padding-left: 0; }
.specstrip__cell:last-child { padding-right: 0; }
.specstrip__k {
  font-size: .63rem; letter-spacing: .16em; text-transform: uppercase;
  color: var(--ink-3); margin: 0 0 .35rem;
}
.specstrip__v { margin: 0; font-size: .9rem; line-height: 1.45; }

.code { display: inline-flex; align-items: center; gap: .5rem; flex-wrap: wrap; }
.code__val {
  font-size: 1.3rem; font-weight: 700; letter-spacing: .12em;
  background: var(--signal-tint); border: 1px solid var(--signal);
  padding: .1rem .5rem; color: var(--ink);
}
.copy {
  font-family: var(--mono); font-size: .66rem; letter-spacing: .12em;
  text-transform: uppercase; cursor: pointer;
  background: var(--ink); color: var(--ground);
  border: 1px solid var(--ink);
  min-height: 44px; padding: 0 .7rem;
}
.copy:hover { background: var(--signal); border-color: var(--signal); }
.copy[data-state="done"] { background: var(--verify); border-color: var(--verify); }

.fnoteband {
  border-bottom: 1px solid var(--rule);
  background: var(--ground);
  padding: .45rem 0 .5rem;
}
.fnote { margin: 0; font-size: .68rem; line-height: 1.5; color: var(--ink-3); }

/* ---------- hero ---------- */

.hero { padding: 2rem 0 1.5rem; border-bottom: 1px solid var(--rule); }
.hero__lead {
  font-family: var(--prose);
  font-size: clamp(1.6rem, 4.2vw, 2.45rem);
  line-height: 1.22; margin: 0 0 .8rem; max-width: 30ch; font-weight: 400;
}
.hero__lead em { font-style: italic; color: var(--signal); }
.hero__sub { max-width: 62ch; margin: 0 0 1.25rem; color: var(--ink-2); font-size: .92rem; }
.actions { display: flex; flex-wrap: wrap; gap: .6rem; }
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  min-height: 44px; padding: 0 1.05rem;
  font-size: .72rem; letter-spacing: .12em; text-transform: uppercase;
  text-decoration: none; border: 1px solid var(--ink); color: var(--ink);
  background: transparent;
}
.btn:hover { background: var(--ink); color: var(--ground); }
.btn--solid { background: var(--ink); color: var(--ground); }
.btn--solid:hover { background: var(--signal); border-color: var(--signal); color: var(--ground); }

/* ---------- section heads ---------- */

.sechead {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 1rem; flex-wrap: wrap; padding: 1.5rem 0 .6rem;
}
.sechead h2 { margin: 0; font-size: .78rem; letter-spacing: .18em; text-transform: uppercase; font-weight: 700; }
.sechead p { margin: 0; font-size: .74rem; color: var(--ink-3); }

/* ---------- filter chips ---------- */

.chips { display: flex; flex-wrap: wrap; gap: 0; border: 1px solid var(--rule-hard); border-bottom: 0; }
.chip {
  font-family: var(--mono); font-size: .68rem; letter-spacing: .1em;
  text-transform: uppercase; cursor: pointer;
  background: var(--ground); color: var(--ink-2);
  border: 0; border-right: 1px solid var(--rule);
  min-height: 44px; padding: 0 .9rem;
}
.chip:last-child { border-right: 0; }
.chip[aria-pressed="true"] { background: var(--ink); color: var(--ground); }

/* ---------- index matrix ---------- */

.matrixwrap { overflow-x: auto; border: 1px solid var(--rule-hard); }
.matrix { width: 100%; border-collapse: collapse; font-size: .84rem; min-width: 640px; }
.matrix caption { text-align: left; padding: .6rem .75rem; font-size: .7rem; color: var(--ink-3); border-bottom: 1px solid var(--rule); }
.matrix th, .matrix td { text-align: left; padding: .62rem .75rem; border-bottom: 1px solid var(--rule); vertical-align: top; }
.matrix thead th {
  font-size: .63rem; letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink-3); font-weight: 700;
  background: var(--panel); border-bottom: 1px solid var(--rule-hard);
}
.matrix tbody tr:hover { background: var(--panel-2); }
.matrix tbody tr:last-child td { border-bottom: 0; }
.matrix .num { color: var(--ink-3); font-variant-numeric: tabular-nums; width: 3.2rem; white-space: nowrap; }
.matrix .ttl { font-weight: 700; }
.matrix .ttl a { text-decoration: none; }
.matrix .ttl a:hover { text-decoration: underline; text-decoration-color: var(--signal); }
.matrix .note { display: block; font-weight: 400; color: var(--ink-2); font-size: .78rem; margin-top: .2rem; max-width: 54ch; }
.matrix td.n { font-variant-numeric: tabular-nums; white-space: nowrap; }

.tag {
  display: inline-block; font-size: .61rem; letter-spacing: .1em;
  text-transform: uppercase; padding: .12rem .42rem;
  border: 1px solid var(--rule-hard); color: var(--ink-2); white-space: nowrap;
}
.tag--cor { border-color: var(--signal); color: var(--signal); }
.dated { color: var(--verify); font-size: .68rem; white-space: nowrap; }
.unk { color: var(--ink-3); }

/* ---------- disclosure line (top of every comparison page) ---------- */

.disclose {
  border: 1px solid var(--signal); background: var(--signal-tint);
  padding: .6rem .8rem; margin: 1.2rem 0 0;
  font-size: .78rem; line-height: 1.5;
}
.disclose a { color: var(--signal); }

/* ---------- article ---------- */

.doc { padding: 0 0 2.5rem; }
.crumbs { padding: .8rem 0; font-size: .68rem; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3); border-bottom: 1px solid var(--rule); }
.crumbs a { color: var(--ink-3); }
.crumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: .45rem; margin: 0; padding: 0; }
.crumbs li + li::before { content: "/"; margin-right: .45rem; color: var(--rule-hard); }

.dochead { padding: 1.5rem 0 1.2rem; border-bottom: 1px solid var(--rule-hard); }
.dochead h1 { font-family: var(--prose); font-weight: 400; font-size: clamp(1.7rem, 4.4vw, 2.55rem); line-height: 1.2; margin: .5rem 0 .7rem; max-width: 26ch; }
.dochead .standfirst { font-family: var(--prose); font-size: 1.06rem; line-height: 1.6; color: var(--ink-2); max-width: 60ch; margin: 0 0 1rem; }
.meta { display: flex; flex-wrap: wrap; gap: .4rem 1.1rem; font-size: .68rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); }

.layout { display: grid; grid-template-columns: minmax(0,1fr); gap: 2rem; padding-top: 1.6rem; }
@media (min-width: 62rem) {
  .layout { grid-template-columns: 15rem minmax(0,1fr); gap: 3rem; }
  .toc { position: sticky; top: 1rem; align-self: start; max-height: calc(100vh - 2rem); overflow-y: auto; }
}
.toc h2 { font-size: .63rem; letter-spacing: .16em; text-transform: uppercase; color: var(--ink-3); margin: 0 0 .5rem; }
.toc ol { list-style: none; margin: 0; padding: 0; counter-reset: t; border-top: 1px solid var(--rule); }
.toc li { counter-increment: t; border-bottom: 1px solid var(--rule); }
.toc a { display: block; padding: .45rem 0; font-size: .76rem; text-decoration: none; color: var(--ink-2); }
.toc a::before { content: counter(t, decimal-leading-zero) "  "; color: var(--ink-3); }
.toc a:hover { color: var(--signal); }

.prose { font-family: var(--prose); font-size: 1.06rem; line-height: 1.72; max-width: 68ch; }
.prose h2 { font-family: var(--mono); font-size: .82rem; letter-spacing: .12em; text-transform: uppercase; font-weight: 700; margin: 2.6rem 0 .9rem; padding-top: .8rem; border-top: 1px solid var(--rule-hard); }
.prose h3 { font-family: var(--mono); font-size: .76rem; letter-spacing: .08em; font-weight: 700; margin: 1.9rem 0 .6rem; color: var(--ink); }
.prose p { margin: 0 0 1.05rem; }
.prose ul, .prose ol { margin: 0 0 1.05rem; padding-left: 1.3rem; }
.prose li { margin-bottom: .45rem; }
.prose a { color: var(--signal); }
.prose figure { margin: 1.6rem 0; }
.prose figure img, .prose figure svg { display: block; width: 100%; height: auto; border: 1px solid var(--rule-hard); }
.prose figcaption { font-family: var(--mono); font-size: .68rem; color: var(--ink-3); margin-top: .45rem; }

.lede { font-family: var(--mono); font-size: .9rem; line-height: 1.6; border-left: 3px solid var(--signal); padding: .1rem 0 .1rem .85rem; margin: 0 0 1.4rem; color: var(--ink); }

.tablewrap { overflow-x: auto; border: 1px solid var(--rule-hard); margin: 1.5rem 0; }
.data { width: 100%; border-collapse: collapse; font-family: var(--mono); font-size: .8rem; min-width: 560px; }
.data caption { text-align: left; padding: .55rem .7rem; font-size: .68rem; color: var(--ink-3); border-bottom: 1px solid var(--rule); }
.data th, .data td { text-align: left; padding: .55rem .7rem; border-bottom: 1px solid var(--rule); vertical-align: top; }
.data thead th { font-size: .62rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-3); background: var(--panel); border-bottom: 1px solid var(--rule-hard); }
.data tbody tr:last-child td { border-bottom: 0; }
.data td.n { font-variant-numeric: tabular-nums; white-space: nowrap; }

.callout { border: 1px solid var(--rule-hard); background: var(--panel-2); padding: .95rem 1rem; margin: 1.5rem 0; font-family: var(--mono); font-size: .84rem; line-height: 1.6; }
.callout p:last-child { margin-bottom: 0; }
.callout__k { font-size: .62rem; letter-spacing: .16em; text-transform: uppercase; color: var(--ink-3); margin: 0 0 .4rem; }

.faq { margin: 2rem 0 0; border-top: 1px solid var(--rule-hard); }
.faq details { border-bottom: 1px solid var(--rule); }
.faq summary { cursor: pointer; padding: .85rem 0; font-family: var(--mono); font-size: .84rem; font-weight: 700; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "+ "; color: var(--signal); }
.faq details[open] summary::before { content: "- "; }
.faq .a { font-family: var(--prose); font-size: 1rem; line-height: 1.65; padding: 0 0 1rem; max-width: 66ch; }
.faq .a p { margin: 0 0 .8rem; }
.faq .a p:last-child { margin-bottom: 0; }

/* ---------- tools ---------- */

.panel { border: 1px solid var(--rule-hard); background: var(--panel-2); margin: 1.4rem 0; }
.panel__hd { padding: .6rem .85rem; border-bottom: 1px solid var(--rule); font-size: .64rem; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3); background: var(--panel); }
.panel__bd { padding: 1rem .85rem; }

.field { display: block; margin-bottom: 1.1rem; }
.field__q { display: block; font-size: .82rem; font-weight: 700; margin-bottom: .5rem; }
.opts { display: flex; flex-wrap: wrap; gap: .4rem; }
.opt { display: inline-flex; align-items: center; min-height: 44px; border: 1px solid var(--rule-hard); background: var(--ground); padding: 0 .8rem; font-size: .78rem; cursor: pointer; }
.opt input { margin-right: .5rem; }
.opt:hover { border-color: var(--signal); }

select, input[type="search"] {
  font-family: var(--mono); font-size: .84rem;
  min-height: 44px; padding: 0 .6rem;
  background: var(--ground); color: var(--ink);
  border: 1px solid var(--rule-hard); max-width: 100%;
}

.out { border: 1px solid var(--ink); background: var(--ground); padding: 1rem .9rem; }
.out__k { font-size: .62rem; letter-spacing: .16em; text-transform: uppercase; color: var(--ink-3); margin: 0 0 .5rem; }
.out h3 { margin: 0 0 .5rem; font-size: 1rem; }
.out p { margin: 0 0 .7rem; font-size: .86rem; line-height: 1.6; }
.out p:last-child { margin-bottom: 0; }
.cost { border-left: 3px solid var(--signal); padding-left: .8rem; }

/* ---------- footer ---------- */

.foot { border-top: 1px solid var(--rule-hard); margin-top: 2.5rem; padding: 1.6rem 0 2.5rem; font-size: .78rem; color: var(--ink-2); }
.foot__grid { display: grid; gap: 1.5rem; grid-template-columns: minmax(0,1fr); }
@media (min-width: 46rem) { .foot__grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 62rem) { .foot__grid { grid-template-columns: 1.6fr 1fr 1fr 1fr; } }
.foot h2 { font-size: .62rem; letter-spacing: .16em; text-transform: uppercase; color: var(--ink-3); margin: 0 0 .6rem; }
.foot ul { list-style: none; margin: 0; padding: 0; }
.foot li { margin-bottom: .35rem; }
.foot a { color: var(--ink-2); }
.foot__disc { margin: 1.4rem 0 0; padding-top: 1rem; border-top: 1px solid var(--rule); font-size: .74rem; line-height: 1.6; color: var(--ink-3); max-width: 78ch; }
.foot__disc a { color: var(--signal); }

/* ---------- 404 ---------- */
.oops { padding: 4rem 0; }
.oops h1 { font-family: var(--mono); font-size: 3.5rem; margin: 0 0 .5rem; letter-spacing: .1em; }

/* ---------- responsive ---------- */

@media (max-width: 46rem) {
  .specstrip__in { grid-template-columns: minmax(0,1fr); }
  .specstrip__cell { border-left: 0; border-top: 1px solid var(--rule); padding-left: 0; padding-right: 0; }
  .specstrip__cell:first-child { border-top: 0; }
  .topbar__in { flex-direction: column; }
  .wordmark { min-height: 44px; }
  .nav { border-top: 1px solid var(--rule); margin: 0 calc(var(--gut) * -1); padding: 0 var(--gut); }
  .nav a { border-left: 0; border-right: 1px solid var(--rule); padding: 0 .7rem; min-height: 44px; }
  .hero { padding: 1rem 0 1.1rem; }
  .hero__lead { font-size: clamp(1.45rem, 6.2vw, 1.85rem); margin-bottom: .6rem; }
  .hero__sub { margin-bottom: 1rem; font-size: .86rem; }
  .specstrip__cell { padding-top: .55rem; padding-bottom: .55rem; }
}

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