/* ==========================================================================
   datacenterequipmentbuyer.com — "COLD AISLE" design system
   Data center facility documentation: rack elevations, cage numbering,
   asset tags, U-position labels. NOT a SaaS landing page.

   RULES ENFORCED HERE (see ideas.md):
   - Cool graphite + cold white. Warm only in the amber signal color.
   - Sodium-vapor amber is the ONLY accent; it always means "act".
   - Asymmetric asset ledger (1fr / 33%). Never a centered single column.
   - Barlow Condensed (display) / Inter Tight (prose) / JetBrains Mono (data).
   - Square corners, hairline rules, zero soft shadows.
   - Zero JavaScript. State via :hover :focus-visible :active <details>.
   ========================================================================== */

:root {
  --ground:      oklch(0.975 0.003 240);   /* cold ambient white */
  --ground-2:    oklch(0.945 0.005 240);   /* recessed panel */
  --ground-3:    oklch(0.905 0.007 240);   /* label bar / footer */
  --ink:         oklch(0.24 0.012 250);    /* graphite, never #000 */
  --ink-soft:    oklch(0.40 0.012 250);
  --steel:       oklch(0.46 0.014 250);
  --steel-line:  oklch(0.80 0.008 250);
  --signal:      oklch(0.79 0.155 88);     /* SIGNATURE — CTAs only */
  --signal-deep: oklch(0.70 0.145 82);
  --copper:      oklch(0.60 0.10 40);
  --danger:      oklch(0.52 0.19 25);

  --ease-out:    cubic-bezier(0.23, 1, 0.32, 1);
  --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);

  --rail: 33%;
  --maxw: 1240px;
  --gut: clamp(1.1rem, 4vw, 3rem);
}

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

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

body {
  margin: 0;
  background-color: var(--ground);
  /* Raised-floor tile grid, felt rather than noticed. */
  background-image:
    repeating-linear-gradient(90deg, transparent 0 47px,
      oklch(0.46 0.014 250 / 0.045) 47px 48px),
    repeating-linear-gradient(0deg, transparent 0 47px,
      oklch(0.46 0.014 250 / 0.03) 47px 48px);
  color: var(--ink);
  font-family: "Inter Tight", "Helvetica Neue", Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.68;
  overflow-x: hidden;
}

/* ---------------------------------------------------------------- type */
h1, h2, h3, h4 {
  font-family: "Barlow Condensed", "Arial Narrow", Impact, sans-serif;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.014em;
  line-height: 1.05;
  margin: 0;
  text-wrap: balance;
}

h1 { font-size: clamp(2.15rem, 5.4vw, 3.8rem); }
h2 { font-size: clamp(1.55rem, 3.1vw, 2.2rem); }
h3 { font-size: clamp(1.14rem, 1.9vw, 1.42rem); }
h4 { font-size: 1rem; letter-spacing: 0.05em; }

p { margin: 0 0 1.15em; }
p:last-child { margin-bottom: 0; }

a { color: var(--ink); }

.lnk {
  position: relative;
  text-decoration: none;
  border-bottom: 1px solid var(--steel-line);
  padding-bottom: 1px;
}
.lnk::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 2px;
  background: var(--signal);
  transform: scaleX(0);
  transform-origin: left center;
}
@media (prefers-reduced-motion: no-preference) {
  .lnk::after { transition: transform 140ms var(--ease-out); }
}
.lnk:hover::after, .lnk:focus-visible::after { transform: scaleX(1); }

:where(a, button, summary, input, textarea, select):focus-visible {
  outline: 2px solid var(--signal-deep);
  outline-offset: 3px;
  border-radius: 1px;
}

/* Asset-tag data voice. */
.mono, .plate td, .plate th, .lbl, .kv, .crumbs, .tag {
  font-family: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
}

.lbl {
  display: block;
  font-size: 0.67rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--steel);
}

/* ---------------------------------------------------------------- shell */
.wrap { max-width: var(--maxw); margin: 0 auto; padding-inline: var(--gut); }

/* ---------------------------------------------------------------- header */
.top { border-bottom: 2px solid var(--ink); background: var(--ground); }
.top-in {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0.8rem var(--gut);
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

/* Wordmark = cabinet asset tag. */
.mark { display: flex; align-items: center; gap: 0.7rem; text-decoration: none; margin-right: auto; }
.mark img { width: 42px; height: 42px; display: block; flex: none; }
.mark-txt { display: block; }
.mark-1 {
  display: block;
  font-family: "Barlow Condensed", sans-serif;
  font-weight: 600;
  font-size: 1.42rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  line-height: 1;
  color: var(--ink);
}
.mark-rule { display: block; height: 2px; background: var(--signal); margin: 3px 0; }
.mark-2 {
  display: block;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.48rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  line-height: 1;
  color: var(--steel);
}

.top nav { display: flex; gap: 1.1rem; flex-wrap: wrap; align-items: center; }
.top nav a {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--steel);
  border-bottom: 2px solid transparent;
  padding-bottom: 2px;
}
@media (prefers-reduced-motion: no-preference) {
  .top nav a { transition: color 140ms var(--ease-out), border-color 140ms var(--ease-out); }
}
.top nav a:hover, .top nav a:focus-visible { color: var(--ink); border-bottom-color: var(--signal); }

.top-tel {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--ink);
  border: 2px solid var(--ink);
  padding: 0.4rem 0.75rem;
  white-space: nowrap;
}
@media (prefers-reduced-motion: no-preference) {
  .top-tel { transition: background-color 180ms var(--ease-out); }
}
.top-tel:hover, .top-tel:focus-visible { background: var(--signal); border-color: var(--signal); }
.top-tel:active { transform: scale(0.97); }

/* ---------------------------------------------------------------- hero */
.hero { border-bottom: 2px solid var(--ink); position: relative; }
/* Rack mounting rail down the left edge. */
.hero::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 6px;
  background: repeating-linear-gradient(
    180deg, var(--ink) 0 3px, transparent 3px 11px);
  opacity: 0.5;
}
.hero-in {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(1.75rem, 4vw, 3rem) var(--gut) clamp(1.6rem, 3.5vw, 2.5rem);
  display: grid;
  grid-template-columns: 1fr var(--rail);
  gap: clamp(1.6rem, 3.5vw, 3.25rem);
  align-items: start;
}
@media (max-width: 900px) { .hero-in { grid-template-columns: 1fr; } }

.eyebrow {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.19em;
  text-transform: uppercase;
  color: var(--steel);
  margin: 0 0 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.eyebrow::after { content: ""; flex: 1; height: 1px; background: var(--steel-line); }

.h1-rule { width: 108px; height: 3px; background: var(--signal); margin: 1.05rem 0 1.25rem; }

.lede { font-size: clamp(1.08rem, 1.5vw, 1.24rem); line-height: 1.6; max-width: 62ch; }

/* Service differentiator callout — a stamped facility notice. */
.freight {
  border: 2px solid var(--ink);
  border-left: 7px solid var(--signal);
  background: var(--ground-2);
  padding: 0.9rem 1.1rem;
  margin: 1.5rem 0 0;
  max-width: 62ch;
}
.freight .lbl { margin-bottom: 0.3rem; }
.freight p { margin: 0; font-size: 1.02rem; line-height: 1.55; }
.freight.pay { border-left-color: var(--ink); }
.freight.pay .lbl { color: var(--ink); font-weight: 600; }

/* ---------------------------------------------------------------- asset plate */
.plate { border: 2px solid var(--ink); background: var(--ground-2); margin: 0 0 1.5rem; }
.plate-hd {
  background: var(--ink);
  color: var(--ground);
  padding: 0.5rem 0.8rem;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.67rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
}
.plate-hd span:last-child { color: var(--signal); }
.plate-bd { padding: 0.35rem 0.8rem 0.7rem; }
.plate table { width: 100%; border-collapse: collapse; }
.plate tr { border-bottom: 1px solid var(--steel-line); }
.plate tr:last-child { border-bottom: 0; }
.plate th, .plate td {
  text-align: left;
  padding: 0.48rem 0;
  font-size: 0.775rem;
  vertical-align: top;
  line-height: 1.45;
}
.plate th { font-weight: 400; color: var(--steel); width: 45%; padding-right: 0.9rem; }
.plate td { font-weight: 500; color: var(--ink); }

/* U-position ticks on primary plates. */
.rivets { position: relative; }
.rivets::before {
  content: "";
  position: absolute;
  left: -2px; top: 2.1rem; bottom: 0;
  width: 2px;
  background: repeating-linear-gradient(180deg,
    var(--signal) 0 2px, transparent 2px 9px);
}

/* ---------------------------------------------------------------- quote form */
.rfq { border: 3px solid var(--ink); background: var(--ground); }
.rfq-hd {
  background: var(--ink);
  color: var(--ground);
  padding: 0.65rem 0.95rem;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  border-bottom: 3px solid var(--signal);
}
.rfq-bd { padding: 1rem 0.95rem 1.1rem; }
.rfq-bd > p { font-size: 0.9rem; line-height: 1.55; }
.rfq-row { display: grid; gap: 0.55rem; margin-bottom: 0.85rem; }
.rfq-row.two { grid-template-columns: 1fr 1fr; gap: 0.7rem; }
@media (max-width: 460px) { .rfq-row.two { grid-template-columns: 1fr; } }
.rfq label {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.61rem;
  font-weight: 500;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--steel);
  display: block;
  margin-bottom: 0.28rem;
}
.rfq input, .rfq textarea, .rfq select {
  width: 100%;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.86rem;
  color: var(--ink);
  background: oklch(1 0 0 / 0.7);
  border: 1px solid var(--steel);
  border-radius: 0;
  padding: 0.5rem 0.6rem;
  -webkit-appearance: none;
  appearance: none;
}
.rfq select {
  background-image: linear-gradient(45deg, transparent 50%, var(--steel) 50%),
                    linear-gradient(135deg, var(--steel) 50%, transparent 50%);
  background-position: calc(100% - 15px) 51%, calc(100% - 10px) 51%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 1.9rem;
}
.rfq textarea { min-height: 84px; resize: vertical; line-height: 1.5; }
@media (prefers-reduced-motion: no-preference) {
  .rfq input, .rfq textarea, .rfq select {
    transition: border-color 180ms var(--ease-out), background-color 180ms var(--ease-out);
  }
}
.rfq input:hover, .rfq textarea:hover, .rfq select:hover { border-color: var(--ink); }
.rfq input:focus, .rfq textarea:focus, .rfq select:focus {
  border-color: var(--signal-deep);
  background: oklch(1 0 0 / 0.95);
  outline: 2px solid var(--signal-deep);
  outline-offset: 1px;
}

/* Primary CTA: mechanical press. */
.btn {
  display: block;
  width: 100%;
  font-family: "Barlow Condensed", sans-serif;
  font-weight: 600;
  font-size: 1.08rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  text-align: center;
  text-decoration: none;
  color: var(--ink);
  background: var(--signal);
  border: 2px solid var(--ink);
  border-radius: 0;
  padding: 0.72rem 1rem;
  cursor: pointer;
}
@media (prefers-reduced-motion: no-preference) {
  .btn { transition: background-color 160ms var(--ease-out), transform 160ms var(--ease-out); }
}
.btn:hover, .btn:focus-visible { background: var(--signal-deep); }
.btn:active { transform: scale(0.97); }
.btn-ghost { background: transparent; color: var(--ink); }
.btn-ghost:hover, .btn-ghost:focus-visible { background: var(--ground-3); }

.rfq-alt {
  margin-top: 0.8rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--steel-line);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.76rem;
  line-height: 1.65;
  color: var(--steel);
}
.rfq-alt a { color: var(--ink); font-weight: 600; }

/* ---------------------------------------------------------------- body layout */
.ledger {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(2rem, 4.5vw, 3.4rem) var(--gut);
  display: grid;
  grid-template-columns: 1fr var(--rail);
  gap: clamp(1.75rem, 4vw, 3.5rem);
  align-items: start;
}
@media (max-width: 900px) {
  .ledger { grid-template-columns: 1fr; }
  .ledger > .rail { order: -1; }
}
.rail { position: sticky; top: 1.25rem; }
@media (max-width: 900px) { .rail { position: static; } }

.sec { margin: 0 0 2.4rem; }
.sec:last-child { margin-bottom: 0; }
.sec-hd {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--ink);
}
.sec-hd .num {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--signal-deep);
  flex: none;
  padding-top: 0.2rem;
}
.prose { max-width: 68ch; }
.prose h3 { margin: 1.9rem 0 0.55rem; }
.prose h3:first-child { margin-top: 0; }

/* ---------------------------------------------------------------- figure */
figure { margin: 0 0 1.5rem; border: 2px solid var(--ink); background: var(--ground-2); }
figure img {
  display: block;
  width: 100%;
  height: auto;
  border-bottom: 2px solid var(--ink);
  filter: saturate(0.92) contrast(1.04);
}
figcaption {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.65rem;
  letter-spacing: 0.07em;
  color: var(--steel);
  padding: 0.5rem 0.7rem;
  line-height: 1.5;
}
.hero figure { margin-bottom: 1.1rem; }
.hero figure img {
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: center 52%;
}

/* ---------------------------------------------------------------- cards/grids */
.grid { display: grid; gap: 1px; background: var(--ink); border: 2px solid var(--ink); }
.grid.c2 { grid-template-columns: repeat(2, 1fr); }
.grid.c3 { grid-template-columns: repeat(3, 1fr); }
.grid.c4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 980px) { .grid.c4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 760px) { .grid.c2, .grid.c3, .grid.c4 { grid-template-columns: 1fr; } }

.cell {
  background: var(--ground);
  padding: 1rem 1.05rem 1.1rem;
  text-decoration: none;
  display: block;
  color: var(--ink);
}
@media (prefers-reduced-motion: no-preference) {
  .cell { transition: background-color 180ms var(--ease-out); }
}
a.cell:hover, a.cell:focus-visible { background: var(--ground-3); }
.cell h3 { margin: 0.3rem 0 0.4rem; }
.cell p { font-size: 0.9rem; line-height: 1.58; color: var(--ink-soft); margin: 0; }
.cell .kv {
  display: block;
  margin-top: 0.6rem;
  font-size: 0.67rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--copper);
}

/* Dense link columns — city/state indexes. */
.cols { columns: 4 190px; column-gap: 1.75rem; margin: 0; padding: 0; list-style: none; }
.cols li { break-inside: avoid; border-bottom: 1px solid var(--steel-line); padding: 0.3rem 0; }
.cols a {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.78rem;
  text-decoration: none;
  color: var(--ink);
  display: block;
}
@media (prefers-reduced-motion: no-preference) {
  .cols a { transition: color 140ms var(--ease-out), padding-left 140ms var(--ease-out); }
}
.cols a:hover, .cols a:focus-visible { color: var(--signal-deep); padding-left: 4px; }
.cols .pop { color: var(--steel); font-size: 0.67rem; }

/* ---------------------------------------------------------------- misc */
.crumbs {
  font-size: 0.65rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--steel);
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--steel-line);
}
.crumbs a { color: var(--steel); text-decoration: none; }
.crumbs a:hover, .crumbs a:focus-visible { color: var(--signal-deep); }
.crumbs .sep { color: var(--steel-line); padding: 0 0.35rem; }

.tagrow { display: flex; flex-wrap: wrap; gap: 0.4rem; margin: 0.9rem 0 0; }
.tag {
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid var(--steel);
  padding: 0.24rem 0.5rem;
  color: var(--steel);
  text-decoration: none;
}
@media (prefers-reduced-motion: no-preference) {
  .tag { transition: background-color 160ms var(--ease-out), color 160ms var(--ease-out), border-color 160ms var(--ease-out); }
}
a.tag:hover, a.tag:focus-visible { background: var(--ink); color: var(--ground); border-color: var(--ink); }

.warn {
  border: 2px solid var(--danger);
  border-left: 7px solid var(--danger);
  background: oklch(0.52 0.19 25 / 0.045);
  padding: 0.85rem 1rem;
  margin: 1.5rem 0;
}
.warn .lbl { color: var(--danger); margin-bottom: 0.3rem; }
.warn p { font-size: 0.93rem; margin: 0; line-height: 1.58; }

/* FAQ — CSS-only disclosure. */
.faq { border: 2px solid var(--ink); background: var(--ground-2); }
.faq details { border-bottom: 1px solid var(--steel-line); }
.faq details:last-child { border-bottom: 0; }
.faq summary {
  cursor: pointer;
  padding: 0.8rem 1rem;
  font-family: "Barlow Condensed", sans-serif;
  font-weight: 600;
  font-size: 1.08rem;
  text-transform: uppercase;
  letter-spacing: 0.015em;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  font-family: "JetBrains Mono", monospace;
  font-size: 1.15rem;
  color: var(--signal-deep);
  flex: none;
  line-height: 1;
}
.faq details[open] summary::after { content: "\2212"; }
@media (prefers-reduced-motion: no-preference) {
  .faq summary { transition: background-color 180ms var(--ease-out); }
}
.faq summary:hover { background: var(--ground-3); }
.faq .ans { padding: 0 1rem 0.95rem; font-size: 0.95rem; line-height: 1.66; }

/* Stat strip. */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--ink);
  border-block: 2px solid var(--ink);
  padding-inline: max(0px, calc((100vw - var(--maxw)) / 2));
}
@media (max-width: 760px) { .stats { grid-template-columns: repeat(2, 1fr); } }
.stat { background: var(--ground); padding: 1rem clamp(1rem, 2.2vw, 1.6rem); }
.stats > .stat:first-child { padding-left: var(--gut); }
.stat b {
  font-family: "Barlow Condensed", sans-serif;
  font-weight: 600;
  font-size: clamp(1.4rem, 2.7vw, 2rem);
  display: block;
  line-height: 1.1;
}
.stat span {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--steel);
  display: block;
  margin-top: 0.2rem;
}

/* Full-bleed CTA band with rack rail. */
.band { border-block: 2px solid var(--ink); background: var(--ground-2); position: relative; }
.band::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 6px;
  background: repeating-linear-gradient(180deg, var(--signal) 0 3px, transparent 3px 11px);
}
.band-in {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(1.6rem, 3.5vw, 2.6rem) var(--gut);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: clamp(1.25rem, 3vw, 2.5rem);
  align-items: center;
}
@media (max-width: 760px) { .band-in { grid-template-columns: 1fr; } }
.band h2 { margin-bottom: 0.5rem; }
.band p { max-width: 58ch; margin: 0; }
.band-act { display: flex; flex-direction: column; gap: 0.6rem; min-width: 232px; }

/* Hero / inline button row. */
.acts { display: flex; flex-wrap: wrap; gap: 0.7rem; margin-top: 1.4rem; }
.acts .btn { flex: 0 0 auto; width: auto; padding-inline: 1.6rem; }
@media (max-width: 460px) {
  .acts { flex-direction: column; align-items: stretch; }
  .acts .btn { width: 100%; }
}

/* Three stamped promise cells. */
.promises {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 2px solid var(--ink);
  background: var(--ground-2);
  margin: 1.75rem 0 0;
}
.promises .promise { padding: 0.85rem 1.05rem; border-right: 1px solid var(--steel-line); }
.promises .promise:last-child { border-right: 0; }
.promises .lbl { margin-bottom: 0.28rem; }
.promises b {
  display: block;
  font-family: "Barlow Condensed", sans-serif;
  font-weight: 600;
  font-size: 1.05rem;
  line-height: 1.2;
  text-transform: uppercase;
}
.promises .promise:nth-child(2) {
  background: var(--signal);
  box-shadow: inset 0 0 0 1px oklch(1 0 0 / 0.28);
}
.promises .promise:nth-child(2) .lbl { color: oklch(0.3 0.05 80); }
.promises .promise:nth-child(2) b { color: var(--ink); }
@media (max-width: 660px) {
  .promises { grid-template-columns: 1fr; }
  .promises .promise { border-right: 0; border-bottom: 1px solid var(--steel-line); }
  .promises .promise:last-child { border-bottom: 0; }
}

/* Numbered guarantees list. */
.guars { margin: 1.5rem 0 0; }
.guar {
  display: grid;
  grid-template-columns: 3.4rem 1fr;
  gap: 1rem;
  padding: 1.15rem 0;
  border-top: 1px solid var(--steel-line);
}
.guar:last-child { border-bottom: 1px solid var(--steel-line); }
.guar .num {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--signal-deep);
  letter-spacing: 0.06em;
  padding-top: 0.25rem;
}
.guar h3 { font-size: 1.09rem; margin: 0 0 0.35rem; }
.guar p { margin: 0; font-size: 0.96rem; line-height: 1.7; color: var(--ink-soft); }
@media (max-width: 660px) { .guar { grid-template-columns: 1fr; gap: 0.3rem; } }

/* ---------------------------------------------------------------- footer */
.foot { border-top: 2px solid var(--ink); background: var(--ground-3); }
.foot-in {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(1.75rem, 3.5vw, 2.75rem) var(--gut) 1.5rem;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: clamp(1.25rem, 3vw, 2.5rem);
}
@media (max-width: 900px) { .foot-in { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .foot-in { grid-template-columns: 1fr; } }
.foot h4 { margin-bottom: 0.7rem; color: var(--ink); }
.foot ul { list-style: none; margin: 0; padding: 0; }
.foot li { margin-bottom: 0.38rem; }
.foot a {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.75rem;
  text-decoration: none;
  color: var(--ink-soft);
}
.foot a:hover, .foot a:focus-visible { color: var(--signal-deep); }
.foot p { font-size: 0.86rem; color: var(--ink-soft); }
.foot-bar {
  border-top: 1px solid var(--steel);
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0.9rem var(--gut) 1.5rem;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.67rem;
  letter-spacing: 0.06em;
  color: var(--steel);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--signal);
  color: var(--ink);
  padding: 0.6rem 1rem;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.75rem;
  z-index: 50;
}
.skip:focus { left: 0; }

/* ------------------------------------------------------- layout corrections */
.sec > .sec-hd { max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gut); }
.sec > .ledger { padding-top: 1.1rem; }
.sec > .prose,
.sec > .grid,
.sec > .faq,
.sec > .cols,
.sec > .guars,
.sec > .rfq { max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gut); }
.sec > .grid {
  box-sizing: content-box;
  max-width: calc(var(--maxw) - 2 * var(--gut));
}
.sec > .faq, .sec > .rfq { box-sizing: content-box; max-width: calc(var(--maxw) - 2 * var(--gut)); }

/* Standalone RFQ section (outside .sec) keeps the page gutter. */
main > .rfq {
  max-width: calc(var(--maxw) - 2 * var(--gut));
  margin: 0 auto clamp(2rem, 4vw, 3rem);
}

@media print {
  .top nav, .rfq, .band, .foot ul { display: none; }
  body { background: #fff; }
}