/* Layout: a field-guide spec sheet. Prose sits in one ~68ch column; comparison
   tables and the temperature chart run the full width. The thermometer bar
   (cold blue to hi-vis orange) is the one recurring visual. */
:root {
  --paper: #f4f6f7;
  --surface: #ffffff;
  --ink: #13202a;
  --muted: #55636f;
  --rule: #d5dde3;
  --chip: #e8eef2;
  --cold: #2a68ad;
  --signal: #e2560d;
  --signal-text: #a33f08;
  --focus: #2a68ad;
  --font-display: "Barlow Condensed", "Arial Narrow", "Roboto Condensed", system-ui, sans-serif;
  --font-body: "Barlow", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --measure: 68ch;
  --wide: 74rem;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0d141a; --surface: #141d25; --ink: #e2e8ed; --muted: #9aa8b4; --rule: #26343f;
    --chip: #1b2731; --cold: #62a1e6; --signal: #ff7a33; --signal-text: #ff9a62; --focus: #7db4ef;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #0d141a; --surface: #141d25; --ink: #e2e8ed; --muted: #9aa8b4; --rule: #26343f;
  --chip: #1b2731; --cold: #62a1e6; --signal: #ff7a33; --signal-text: #ff9a62; --focus: #7db4ef;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 1.0625rem/1.6 var(--font-body);
}
img { max-width: 100%; }
a { color: var(--cold); text-underline-offset: .16em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 2px; }
code { font-family: var(--font-mono); font-size: .88em; }

.wrap {
  max-width: var(--wide);
  margin-inline: auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}
.skip { position: absolute; left: -9999px; }
.skip:focus { left: max(16px, env(safe-area-inset-left, 0px)); top: calc(8px + env(safe-area-inset-top, 0px)); z-index: 10; background: var(--surface); color: var(--ink); padding: .5rem .9rem; }

/* header and footer */
.site-head { background: var(--surface); border-bottom: 1px solid var(--rule); }
.site-head .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .4rem 1.5rem; padding-block: .85rem; }
.brand {
  display: inline-flex; align-items: center; gap: .45rem;
  font: 700 1.55rem/1 var(--font-display); letter-spacing: .03em; text-transform: uppercase;
  color: var(--ink); text-decoration: none;
}
.brand::before {
  content: ""; width: .5rem; height: 1.15rem; border-radius: 2px;
  background: linear-gradient(to top, var(--cold), var(--signal));
}
.site-nav { display: flex; flex-wrap: wrap; gap: .2rem 1.25rem; font-size: .95rem; }
.site-nav a { color: var(--muted); text-decoration: none; }
.site-nav a:hover { color: var(--ink); text-decoration: underline; }
.site-foot { background: var(--surface); border-top: 1px solid var(--rule); color: var(--muted); font-size: .9rem; }
.site-foot .wrap { display: grid; gap: .5rem; padding-block: 1.5rem 2.25rem; }
.site-foot p { margin: 0; max-width: 90ch; }
.site-foot a { color: inherit; }
.machine { font-family: var(--font-mono); font-size: .78rem; }

/* type */
main { padding-block: 1.25rem 4rem; }
h1, h2, h3 { font-family: var(--font-display); line-height: 1.08; text-wrap: balance; margin: 0; }
h1 { font-weight: 700; font-size: clamp(2.3rem, 5.2vw, 3.6rem); letter-spacing: -.005em; max-width: 22ch; }
h2 {
  font-weight: 700; font-size: 1.05rem; letter-spacing: .1em; text-transform: uppercase;
  margin: 3rem 0 .9rem; color: var(--ink);
}
h3 { font-weight: 600; font-size: 1.45rem; }
h3 a { color: var(--ink); text-decoration: none; }
h3 a:hover { text-decoration: underline; }
p { margin: 0 0 1rem; }
.eyebrow { font: 600 .78rem/1.3 var(--font-body); letter-spacing: .09em; text-transform: uppercase; color: var(--muted); margin: 0 0 .5rem; }
.dek { font-size: 1.2rem; line-height: 1.5; max-width: var(--measure); margin: .85rem 0 0; }
.prose { max-width: var(--measure); }
.prose h2 { margin-top: 2.5rem; }
.prose ul, .prose ol { padding-left: 1.25rem; }
.prose li + li { margin-top: .35rem; }
.note { font-size: .92rem; color: var(--muted); max-width: var(--measure); }
.lead-link { margin-top: 1.25rem; font-weight: 600; }
.meta { display: flex; flex-wrap: wrap; gap: .3rem 1.25rem; margin: 1rem 0 0; font-size: .9rem; color: var(--muted); }
.callout { max-width: var(--measure); margin: 1.25rem 0 0; padding: .85rem 1rem; background: var(--surface); border: 1px solid var(--rule); border-left: 4px solid var(--signal); }
ul.plain { list-style: none; padding: 0; margin: 0; display: grid; gap: .45rem; }
.how, .choose, .adjust { max-width: var(--measure); padding-left: 1.2rem; display: grid; gap: .55rem; margin: 0 0 1rem; }

/* breadcrumbs */
.crumbs { margin-bottom: 1.5rem; font-size: .88rem; }
.crumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: .2rem .45rem; margin: 0; padding: 0; color: var(--muted); }
.crumbs li + li::before { content: "/"; margin-right: .45rem; color: var(--rule); }
.crumbs a { color: var(--muted); }

/* category cards */
.cats {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 19rem), 1fr));
  gap: 1px; background: var(--rule); border: 1px solid var(--rule);
}
.cat { background: var(--surface); padding: 1.1rem 1.15rem 1.2rem; display: grid; gap: .4rem; align-content: start; min-width: 0; }
.cat p { margin: 0; }
.cat-stats { font: 500 .8rem/1.4 var(--font-mono); color: var(--muted); font-variant-numeric: tabular-nums; }
.cat-blurb { font-size: .98rem; }
.cat-pick { font-size: .92rem; }
.cat-pick span { color: var(--signal-text); font-weight: 600; }

/* tables */
.table-scroll { overflow-x: auto; background: var(--surface); border: 1px solid var(--rule); border-radius: 4px; }
table { border-collapse: collapse; width: 100%; font-size: .95rem; }
th, td { text-align: left; vertical-align: top; padding: .6rem .8rem; border-bottom: 1px solid var(--rule); }
tbody tr:last-child > * { border-bottom: 0; }
thead th { font: 600 .74rem/1.3 var(--font-body); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); white-space: nowrap; }
tbody th { font-weight: 600; }
.num { font-variant-numeric: tabular-nums; white-space: nowrap; }
.sub { display: block; font-weight: 400; font-size: .84rem; color: var(--muted); }
.compare tbody th { min-width: 13rem; }
.compare tbody th a { color: var(--ink); }
.layering th[scope="row"] { white-space: nowrap; font-variant-numeric: tabular-nums; }
.layering td { min-width: 10rem; }
.specs th { width: 34%; color: var(--muted); font-weight: 500; }

/* quick picks */
.picks { list-style: none; margin: 0; padding: 0; display: grid; gap: 1.25rem 1.5rem; grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr)); }
.pick { border-top: 3px solid var(--ink); padding-top: .65rem; display: grid; gap: .3rem; align-content: start; }
.pick p { margin: 0; font-size: .97rem; }
.pick h3 { font-size: 1.3rem; }
.pick-label { font: 700 .76rem/1.2 var(--font-body) !important; letter-spacing: .09em; text-transform: uppercase; color: var(--signal-text); }
.pick-price { font: 500 .85rem var(--font-mono) !important; color: var(--muted); }

/* temperature chart */
.tchart { margin: 0; padding: .9rem 1rem .8rem; background: var(--surface); border: 1px solid var(--rule); border-radius: 4px; }
.trow { display: grid; grid-template-columns: minmax(0, 15rem) minmax(0, 1fr) 7.2rem; gap: .3rem 1rem; align-items: center; padding-block: .3rem; }
.tname { font-size: .94rem; font-weight: 500; color: var(--ink); text-decoration: none; min-width: 0; }
.tname:hover { text-decoration: underline; }
.tval { font: 500 .8rem/1.2 var(--font-mono); color: var(--muted); text-align: right; font-variant-numeric: tabular-nums; }
.tbar { position: relative; display: block; height: .7rem; border-radius: 99px; background: var(--chip); }
.tbar-seg { position: absolute; top: 0; bottom: 0; border-radius: 99px; background-image: linear-gradient(90deg, var(--cold), var(--signal)); background-repeat: no-repeat; }
.tbar-seg.est { opacity: .45; }
.taxis { position: relative; display: block; height: 1.1rem; margin-top: .35rem; font: .7rem/1 var(--font-mono); color: var(--muted); }
.taxis span { position: absolute; top: 0; transform: translateX(-50%); white-space: nowrap; }
.taxis span:first-child { transform: none; }
.taxis span:last-child { transform: translateX(-100%); }
.trow-axis { padding-top: 0; }
.tchart figcaption { margin-top: .6rem; font-size: .85rem; color: var(--muted); max-width: var(--measure); }
@media (max-width: 40rem) {
  .trow { grid-template-columns: minmax(0, 1fr) auto; }
  .trow .tbar, .trow .taxis { grid-column: 1 / -1; grid-row: 2; }
  .trow-axis > span:not(.taxis) { display: none; }
  .trow-axis .taxis { grid-row: 1; }
}
@media (max-width: 40rem) {
  .taxis span:nth-child(even):not(:last-child) { display: none; }
}

/* product entries on category pages */
.entries { display: grid; gap: 2.25rem; }
.entry { display: grid; gap: .55rem; max-width: var(--measure); padding-top: 1.1rem; border-top: 1px solid var(--rule); }
.entry .eyebrow { margin: 0; }
.entry-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: .2rem 1rem; }
.price { margin: 0; font: 700 1.35rem/1 var(--font-display); font-variant-numeric: tabular-nums; }
.verdict { margin: 0; font-size: 1.06rem; }
.fit { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr)); gap: .6rem 1.5rem; margin: 0; }
.fit dt { font: 600 .74rem/1.3 var(--font-body); letter-spacing: .09em; text-transform: uppercase; color: var(--muted); }
.fit dd { margin: .15rem 0 0; }
.fit-lg { margin-top: 1.5rem; max-width: var(--measure); }
.downsides { margin: 0; }
.more { margin: 0; font-size: .95rem; }

/* buying links */
.offers { list-style: none; margin: 0; padding: 0; display: grid; gap: .55rem; }
.offer-row { display: flex; flex-wrap: wrap; align-items: baseline; gap: .15rem .55rem; }
.offer { font-weight: 600; }
.paid { font-size: .85rem; font-weight: 600; color: var(--signal-text); }
.via { font-size: .85rem; color: var(--muted); }
.offer-url { flex-basis: 100%; font-size: .76rem; line-height: 1.4; color: var(--muted); overflow-wrap: anywhere; }

/* product page */
.pick-badges { display: flex; flex-wrap: wrap; gap: .4rem; margin: .85rem 0 0; }
.pick-badges span { font: 700 .74rem/1 var(--font-body); letter-spacing: .08em; text-transform: uppercase; color: var(--signal-text); border: 1px solid currentColor; padding: .3rem .5rem; border-radius: 2px; }
.facts {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 10.5rem), 1fr));
  gap: 1px; margin: 1.75rem 0 0; background: var(--rule); border: 1px solid var(--rule); border-radius: 4px; overflow: hidden;
}
.facts > div { background: var(--surface); padding: .75rem .9rem; min-width: 0; }
.facts dt { font: 600 .72rem/1.3 var(--font-body); letter-spacing: .09em; text-transform: uppercase; color: var(--muted); }
.facts dd { margin: .25rem 0 0; font-weight: 500; }
.facts .wide { grid-column: 1 / -1; }
.fact-note { display: block; font-size: .84rem; font-weight: 400; color: var(--muted); }
.basis { display: inline-block; margin-left: .4rem; font-size: .8rem; font-weight: 500; color: var(--muted); background: var(--chip); padding: .1rem .45rem; border-radius: 2px; }
.tmeter { display: block; margin-top: .7rem; }
.downs { max-width: var(--measure); }
.downs li { padding-left: 1.1rem; position: relative; }
.downs li::before { content: ""; position: absolute; left: 0; top: .7em; width: .5rem; height: 2px; background: var(--signal); }
.sources { max-width: var(--measure); padding-left: 1.25rem; display: grid; gap: .9rem; }
.sources p { margin: 0; }
.cite { font-size: .9rem; color: var(--muted); }
.provenance { max-width: var(--measure); margin-top: 3rem; padding: 1rem 1.2rem; background: var(--chip); border-radius: 4px; font-size: .95rem; }
.provenance h2 { margin: 0 0 .5rem; font-size: .95rem; }
.provenance ul { margin: 0; padding-left: 1.1rem; display: grid; gap: .3rem; }
.related { list-style: none; margin: 0; padding: 0; display: grid; gap: .45rem; max-width: var(--measure); }
.related span { color: var(--muted); font-size: .9rem; }

@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; } }