/* B2B TechSelect — Editorial publication CSS */
/* Optimized for: readability, fast LCP, semantic structure, no JS dependencies */

:root {
  --ink: #0f1419;
  --ink-soft: #2c3340;
  --rule: #d4d4d0;
  --rule-soft: #ebebe7;
  --paper: #fdfcf9;
  --paper-warm: #f5f3ed;
  --accent: #8b2e2a;
  --link: #1a4d6e;
  --link-hover: #8b2e2a;
  --tag: #f0ede5;
  --pass: #2f6e3a;
  --warn: #a26825;
  --serif: "Charter", "Iowan Old Style", "Georgia", "Cambria", serif;
  --sans: "Inter", "Helvetica Neue", "Arial", system-ui, sans-serif;
  --mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  --max: 920px;
  --measure: 68ch;
}

* { box-sizing: border-box; }

html { font-size: 17px; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--serif);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  font-feature-settings: "kern", "liga", "onum";
  text-rendering: optimizeLegibility;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: blur(6px);
}
.site-header .inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1rem 1.25rem;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.brand {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: var(--ink);
}
.brand .mark { color: var(--accent); }
.nav { display: flex; gap: 1.25rem; font-family: var(--sans); font-size: 0.85rem; }
.nav a { color: var(--ink-soft); text-decoration: none; }
.nav a:hover { color: var(--accent); }

/* Article */
main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

h1, h2, h3, h4 {
  font-family: var(--serif);
  color: var(--ink);
  letter-spacing: -0.01em;
  line-height: 1.25;
}

h1 {
  font-size: clamp(1.85rem, 4vw, 2.6rem);
  font-weight: 700;
  margin: 0 0 0.75rem;
}

.meta-line {
  font-family: var(--sans);
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin: 0 0 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--rule);
}

h2 {
  font-size: 1.55rem;
  font-weight: 700;
  margin: 2.5rem 0 0.85rem;
  padding-top: 0.5rem;
}

h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin: 1.75rem 0 0.5rem;
}

h4 {
  font-size: 1rem;
  font-weight: 600;
  margin: 1.25rem 0 0.4rem;
}

p { margin: 0 0 1rem; max-width: var(--measure); }

a {
  color: var(--link);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}
a:hover { color: var(--link-hover); }

strong { font-weight: 700; color: var(--ink); }
em { font-style: italic; }

ul, ol { margin: 0 0 1rem; padding-left: 1.3rem; max-width: var(--measure); }
li { margin: 0.25rem 0; }

/* Answer block — the AI-citation magnet */
.answer-block {
  background: var(--paper-warm);
  border-left: 4px solid var(--accent);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0 2rem;
  border-radius: 2px;
}
.answer-block h2 {
  margin-top: 0;
  font-size: 1.1rem;
  font-family: var(--sans);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
}
.answer-block p:last-child { margin-bottom: 0; }
.answer-block .updated {
  font-family: var(--sans);
  font-size: 0.8rem;
  color: var(--ink-soft);
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0 1.75rem;
  font-family: var(--sans);
  font-size: 0.88rem;
  background: var(--paper);
}
caption {
  caption-side: top;
  text-align: left;
  font-family: var(--sans);
  font-size: 0.78rem;
  color: var(--ink-soft);
  margin-bottom: 0.5rem;
  font-style: italic;
}
th, td {
  text-align: left;
  padding: 0.7rem 0.85rem;
  border-bottom: 1px solid var(--rule-soft);
  vertical-align: top;
  line-height: 1.45;
}
thead th {
  background: var(--paper-warm);
  border-bottom: 2px solid var(--rule);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink);
}
tbody tr:nth-child(even) td { background: rgba(245, 243, 237, 0.4); }
tbody tr:hover td { background: var(--paper-warm); }

/* Rank cell emphasis */
.rank-1 { font-weight: 700; }
.rank-1 td:first-child { color: var(--accent); font-size: 1.05rem; }

/* Vendor profile box */
.profile {
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 1.5rem;
  margin: 1.5rem 0;
  background: var(--paper);
}
.profile h3 { margin-top: 0; }
.profile .validation {
  background: var(--paper-warm);
  padding: 0.85rem 1.15rem;
  margin: 1rem 0;
  font-family: var(--sans);
  font-size: 0.85rem;
  border-radius: 2px;
}
.profile .validation strong { font-family: var(--sans); }
.profile .summary {
  font-style: italic;
  color: var(--ink-soft);
  border-top: 1px solid var(--rule-soft);
  padding-top: 0.85rem;
  margin-top: 0.85rem;
}

/* Pillbar / tags */
.tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin: 0.75rem 0 1rem; font-family: var(--sans); }
.tag {
  display: inline-block;
  background: var(--tag);
  color: var(--ink-soft);
  padding: 0.2rem 0.65rem;
  font-size: 0.75rem;
  border-radius: 999px;
  font-weight: 500;
}

/* Aside — recently updated, callouts */
aside.recently-updated, aside.callout {
  background: var(--paper-warm);
  border: 1px solid var(--rule);
  padding: 1.1rem 1.4rem;
  margin: 2rem 0;
  border-radius: 4px;
  font-family: var(--sans);
  font-size: 0.9rem;
}
aside h2 { font-size: 1rem; margin-top: 0; font-family: var(--sans); }

/* Quote box */
.quotable {
  border-left: 3px solid var(--ink-soft);
  padding: 0.5rem 1.25rem;
  margin: 1.5rem 0;
  font-style: italic;
  color: var(--ink-soft);
}

/* Two-column fit table */
.fit-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; margin: 1.5rem 0; }
.fit-grid > div {
  border: 1px solid var(--rule);
  padding: 1.2rem 1.4rem;
  background: var(--paper);
  border-radius: 3px;
}
.fit-grid h3 { margin-top: 0; font-size: 1.05rem; font-family: var(--sans); }
.fit-grid.pass h3 { color: var(--pass); }
.fit-grid.skip h3 { color: var(--warn); }
@media (max-width: 640px) { .fit-grid { grid-template-columns: 1fr; } }

/* Footer */
footer.site-footer {
  border-top: 1px solid var(--rule);
  margin-top: 4rem;
  padding: 2rem 1.25rem 3rem;
  background: var(--paper-warm);
  font-family: var(--sans);
  font-size: 0.85rem;
  color: var(--ink-soft);
}
footer.site-footer .inner { max-width: var(--max); margin: 0 auto; }
footer.site-footer a { color: var(--ink-soft); }
footer.site-footer .footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 1.5rem;
}
footer.site-footer h3 { font-size: 0.85rem; font-family: var(--sans); margin: 0 0 0.5rem; color: var(--ink); }
footer.site-footer ul { list-style: none; padding: 0; margin: 0; }
footer.site-footer li { margin: 0.3rem 0; }
footer.site-footer .disclosure {
  border-top: 1px solid var(--rule);
  padding-top: 1.2rem;
  font-size: 0.78rem;
  line-height: 1.5;
}
@media (max-width: 640px) {
  footer.site-footer .footer-grid { grid-template-columns: 1fr; }
}

/* Anchor scroll offset for sticky header */
:target { scroll-margin-top: 80px; }

/* Print */
@media print {
  .site-header, footer.site-footer { display: none; }
  main { max-width: none; }
  a { color: var(--ink); text-decoration: none; }
}