/* Reset (trimmed) */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; }
html, body { min-height: 100%; }
img, picture, video, canvas, svg { display: block; max-width: 100%; }
input, button, textarea, select { font: inherit; color: inherit; }
p, h1, h2, h3, h4, h5, h6 { overflow-wrap: break-word; }
ul, ol { list-style: none; padding: 0; }
a { color: inherit; text-decoration: none; }

/* Page */
body {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  color: var(--color-ink);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Headings — no gradients, modest negative letter-spacing on display sizes */
h1, h2, h3 {
  font-weight: 700;
  line-height: var(--lh-tight);
  letter-spacing: -0.015em;
  color: var(--color-ink);
}
h1 { font-size: var(--fs-4xl); }
h2 { font-size: var(--fs-3xl); }
h3 { font-size: var(--fs-2xl); }
h4 {
  font-size: var(--fs-xl);
  line-height: var(--lh-snug);
  font-weight: 500;
  letter-spacing: 0;
  color: var(--color-ink);
}

/* Numeric measurements (e.g. 242.0 V → 220.0 V) get Plex Mono */
.measurement, code, kbd, samp { font-family: var(--font-mono); }

/* Prose links — scoped to text-flow elements so card-wrapper <a>s stay clean */
main p a:not(.btn),
main li a:not(.btn),
main dd a:not(.btn),
main figcaption a:not(.btn) {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--transition);
}
main p a:not(.btn):hover,
main li a:not(.btn):hover,
main dd a:not(.btn):hover,
main figcaption a:not(.btn):hover { color: var(--color-accent-hover); }

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-ink);
  color: var(--color-bg);
  padding: var(--space-3) var(--space-4);
  z-index: 1000;
  border-radius: var(--radius);
}
.skip-link:focus { left: var(--space-3); top: var(--space-3); }

/* Focus — visible on keyboard only */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 2px;
}

/* --- Site header --- */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-hairline);
}
.site-header__inner {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  padding-block: var(--space-4);
}
.site-header__brand {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  gap: var(--space-3);
}
.site-header__icon {
  height: 52px;
  width: auto;
}
.site-header__wordmark {
  display: flex;
  flex-direction: column;
  line-height: 1;
}
.site-header__volta {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  color: var(--color-accent);
}
.site-header__solutions {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  color: var(--color-accent);
  margin-top: 4px;
}
/* Nav: shared base styles */
.site-nav-toggle { margin-inline-start: auto; }
.site-nav-toggle__btn { display: none; }
.site-nav {
  font-size: var(--fs-sm);
  font-weight: 500;
}
.site-nav a { color: var(--color-ink-muted); transition: color var(--transition); white-space: nowrap; }
.site-nav a:hover,
.site-nav a[aria-current="page"] { color: var(--color-ink); }

/* Desktop (>48rem): force nav visible inline, hide toggle button */
@media (min-width: 48.01rem) {
  details.site-nav-toggle > nav {
    display: flex !important;
    gap: var(--space-4);
  }
  .site-nav-toggle__btn { display: none !important; }
}

.site-header__actions { display: flex; align-items: center; gap: var(--space-4); }
.site-header__phone {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--color-ink-muted);
  white-space: nowrap;
}
.site-header__phone:hover { color: var(--color-ink); }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.625rem 1rem;
  border-radius: var(--radius);
  font-weight: 500;
  font-size: var(--fs-sm);
  line-height: 1;
  white-space: nowrap;
  border: 1px solid transparent;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
  cursor: pointer;
}
.btn--primary { background: var(--color-accent); color: #fff; }
.btn--primary:hover { background: var(--color-accent-hover); }
.btn--ghost {
  background: transparent;
  color: var(--color-ink);
  border-color: var(--color-hairline);
}
.btn--ghost:hover { border-color: var(--color-ink); }

/* --- Site footer --- */
.site-footer {
  padding-block: var(--space-7) var(--space-5);
  background: var(--color-surface);
  border-top: 1px solid var(--color-hairline);
}
.site-footer__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
  gap: var(--space-6);
}
.site-footer h4 {
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
  font-weight: 500;
  margin-bottom: var(--space-3);
}
.site-footer a { color: var(--color-ink); transition: color var(--transition); }
.site-footer a:hover { color: var(--color-accent); }
.site-footer__col ul li { margin-block: var(--space-2); }
.site-footer__col p { margin-block: var(--space-2); }
.site-footer__bottom {
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-hairline);
  font-size: var(--fs-xs);
  color: var(--color-ink-muted);
}

/* ==================================================================
   HOMEPAGE COMPONENTS
   ================================================================== */

/* --- Section rhythm --- */
.section { padding-block: var(--space-8); }
.section--surface {
  background: var(--color-surface);
  border-block: 1px solid var(--color-hairline);
}
.section__header {
  max-width: 52rem;
  margin-bottom: var(--space-6);
}
.section__header h2 { margin-top: var(--space-2); }

/* --- Eyebrow (editorial label in Plex Mono) --- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
  font-weight: 500;
}

/* ==================================================================
   HERO
   ================================================================== */
.hero { padding-block: var(--space-9) var(--space-8); }
.hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: var(--space-8);
  align-items: start;
}
.hero__copy > * + * { margin-top: var(--space-4); }
.hero__h1 {
  font-size: var(--fs-4xl);
  margin-top: var(--space-3);
  max-width: 18ch;
}
.hero__sub {
  font-size: var(--fs-lg);
  color: var(--color-ink-muted);
  max-width: 54ch;
  line-height: 1.5;
}
.hero__ctas {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}
.hero__phone {
  font-size: var(--fs-sm);
  color: var(--color-ink-muted);
}
.hero__phone a { color: var(--color-ink); font-weight: 500; }
.hero__stats {
  display: grid;
  gap: var(--space-4);
}

/* Stat card */
.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.stat-card__value {
  font-size: var(--fs-2xl);
  font-weight: 500;
  color: var(--color-ink);
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  flex-wrap: wrap;
  line-height: 1.1;
}
.stat-card__arrow { color: var(--color-ink-muted); font-weight: 400; }
.stat-card__big { color: var(--color-ink); }
.stat-card__label {
  font-size: var(--fs-sm);
  color: var(--color-ink);
  max-width: 38ch;
  line-height: 1.45;
}
.stat-card__source {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-ink-muted);
  line-height: 1.4;
}

/* ==================================================================
   LOGO STRIP
   ================================================================== */
.logo-strip { padding-block: var(--space-6); }
.logo-strip__eyebrow {
  text-align: center;
  margin-bottom: var(--space-4);
}
.logo-strip__logos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: var(--space-5) var(--space-7);
}
.logo-strip__item img {
  width: 40px;
  height: 40px;
  object-fit: contain;
}
.logo-strip__tile {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
  padding-block: var(--space-2);
}
.logo-strip__note {
  margin-top: var(--space-5);
  text-align: center;
  font-size: var(--fs-xs);
  color: var(--color-ink-muted);
  font-style: italic;
}

/* ==================================================================
   FIT CHECK
   ================================================================== */
.fit-check__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-7);
  align-items: start;
}
.fit-check__list-title {
  font-weight: 500;
  margin-bottom: var(--space-4);
  font-size: var(--fs-lg);
}
.fit-check__list ul {
  display: grid;
  gap: var(--space-3);
}
.fit-check__list li {
  position: relative;
  padding-left: var(--space-5);
  line-height: 1.5;
}
.fit-check__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 14px;
  height: 1px;
  background: var(--color-accent);
}
.fit-check__copy > * + * { margin-top: var(--space-4); }
.fit-check__copy-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-2);
}
.fit-check__copy-strong {
  border-left: 2px solid var(--color-accent);
  padding-left: var(--space-4);
  font-weight: 500;
  font-size: var(--fs-lg);
  max-width: 36ch;
  color: var(--color-ink);
}

/* ==================================================================
   WHY SITES SAVE (with voltage diagram)
   ================================================================== */
.why__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: center;
}
.why__copy > * + * { margin-top: var(--space-4); }
.why__copy p { max-width: 46ch; }
.why__diagram {
  margin: 0;
  background: var(--color-bg);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius);
  padding: var(--space-5);
}
.voltage-diagram {
  width: 100%;
  height: auto;
  display: block;
}
.why__diagram figcaption {
  margin-top: var(--space-3);
  font-size: var(--fs-xs);
  color: var(--color-ink-muted);
  font-style: italic;
}

/* ==================================================================
   SECTOR CARDS
   ================================================================== */
.sector-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}
.sector-card__link {
  display: block;
  padding: var(--space-5) var(--space-5) var(--space-7);
  background: var(--color-surface);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius);
  height: 100%;
  position: relative;
  transition: border-color var(--transition), transform var(--transition);
  color: var(--color-ink);
}
.sector-card__link:hover { border-color: var(--color-ink); }
.sector-card__num {
  display: block;
  font-size: var(--fs-xs);
  color: var(--color-ink-muted);
  letter-spacing: 0.12em;
  margin-bottom: var(--space-4);
}
.sector-card__name {
  font-size: var(--fs-xl);
  font-weight: 500;
  letter-spacing: -0.005em;
  margin-bottom: var(--space-2);
  line-height: var(--lh-snug);
}
.sector-card__desc {
  font-size: var(--fs-sm);
  color: var(--color-ink-muted);
  max-width: 32ch;
  line-height: 1.45;
}
.sector-card__arrow {
  position: absolute;
  bottom: var(--space-4);
  right: var(--space-5);
  color: var(--color-accent);
  font-size: var(--fs-lg);
  transition: transform var(--transition);
}
.sector-card__link:hover .sector-card__arrow { transform: translateX(4px); }

/* ==================================================================
   PROCESS TIMELINE
   ================================================================== */
.process-timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
  position: relative;
  counter-reset: step;
}
.process-timeline::before {
  content: "";
  position: absolute;
  top: 1.05rem;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--color-hairline);
  z-index: 0;
}
.process-step {
  position: relative;
  z-index: 1;
  padding-right: var(--space-3);
}
.process-step__num {
  display: inline-block;
  font-size: var(--fs-xl);
  font-weight: 500;
  color: var(--color-ink);
  background: var(--color-surface);
  padding-right: var(--space-3);
  margin-bottom: var(--space-4);
  line-height: 1;
}
.process-step__name {
  font-size: var(--fs-lg);
  font-weight: 500;
  margin-bottom: var(--space-2);
}
.process-step__desc {
  font-size: var(--fs-sm);
  color: var(--color-ink-muted);
  line-height: 1.5;
  max-width: 24ch;
}

/* Install photo (placeholder until permissioned image lands) */
.install-photo { margin: var(--space-8) 0 0; }
.install-photo__placeholder {
  aspect-ratio: 16 / 7;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
  border: 1px dashed var(--color-hairline);
  color: var(--color-ink-muted);
  border-radius: var(--radius);
  font-size: var(--fs-sm);
  text-align: center;
  padding: var(--space-4);
}
.install-photo figcaption {
  margin-top: var(--space-3);
  font-size: var(--fs-xs);
  color: var(--color-ink-muted);
  font-style: italic;
  text-align: center;
}

/* ==================================================================
   TECHNICAL REASSURANCE
   ================================================================== */
.technical-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6) var(--space-8);
}
.technical-item {
  border-top: 1px solid var(--color-hairline);
  padding-top: var(--space-3);
}
.technical-item dt {
  font-weight: 500;
  font-size: var(--fs-base);
  margin-bottom: var(--space-2);
  color: var(--color-ink);
}
.technical-item dd {
  color: var(--color-ink-muted);
  font-size: var(--fs-sm);
  margin-left: 0;
  max-width: 44ch;
  line-height: 1.55;
}
.technical__out {
  margin-top: var(--space-6);
  font-size: var(--fs-sm);
}

/* ==================================================================
   COMPLIANCE
   ================================================================== */
.compliance__inner { max-width: 48rem; }
.compliance__copy {
  font-size: var(--fs-lg);
  margin-top: var(--space-3);
  max-width: 55ch;
  line-height: 1.5;
}
.compliance__tags {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-top: var(--space-5);
}
.compliance__tag {
  border: 1px solid var(--color-hairline);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius);
  font-size: var(--fs-sm);
  letter-spacing: 0.08em;
  color: var(--color-ink);
  text-transform: uppercase;
}

/* ==================================================================
   CALCULATOR TEASER
   ================================================================== */
.calculator-teaser__inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-6);
  align-items: center;
  padding: var(--space-6) var(--space-7);
  background: var(--color-surface);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius);
}
.calculator-teaser__copy > * + * { margin-top: var(--space-3); }
.calculator-teaser__copy h3 {
  font-size: var(--fs-xl);
  font-weight: 500;
  letter-spacing: -0.005em;
}
.calculator-teaser__copy p {
  color: var(--color-ink-muted);
  max-width: 50ch;
  font-size: var(--fs-sm);
}

/* ==================================================================
   FINAL CTA BAND
   ================================================================== */
.final-cta { padding-block: var(--space-9); }
.final-cta__inner {
  text-align: center;
  max-width: 36rem;
  margin-inline: auto;
}
.final-cta__title {
  font-size: var(--fs-3xl);
  max-width: 16ch;
  margin-inline: auto;
}
.final-cta__sub {
  font-size: var(--fs-lg);
  color: var(--color-ink-muted);
  margin-top: var(--space-4);
  max-width: 44ch;
  margin-inline: auto;
}
.final-cta__actions {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  margin-top: var(--space-6);
  flex-wrap: wrap;
}
.final-cta__email {
  margin-top: var(--space-5);
  font-size: var(--fs-sm);
  color: var(--color-ink-muted);
}

/* ==================================================================
   RESPONSIVE
   ================================================================== */

/* Tablet (≤900px): collapse two-column layouts */
@media (max-width: 56.25rem) {
  .hero__inner { grid-template-columns: 1fr; gap: var(--space-7); }
  .hero__stats { grid-template-columns: repeat(3, 1fr); }
  .fit-check__grid { grid-template-columns: 1fr; gap: var(--space-6); }
  .why__grid { grid-template-columns: 1fr; gap: var(--space-6); }
  .sector-grid { grid-template-columns: repeat(2, 1fr); }
  .process-timeline { grid-template-columns: repeat(2, 1fr); }
  .process-timeline::before { display: none; }
  .technical-list { grid-template-columns: 1fr; gap: var(--space-5); }
  .calculator-teaser__inner { grid-template-columns: 1fr; text-align: left; }
}

/* Mobile nav toggle (≤48rem): show hamburger, dropdown nav */
@media (max-width: 48rem) {
  .site-nav-toggle { position: relative; margin-inline-start: auto; }
  .site-nav-toggle__btn {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: var(--space-2);
    color: var(--color-ink);
    cursor: pointer;
    list-style: none;
    border: none;
    background: transparent;
  }
  .site-nav-toggle__btn::-webkit-details-marker { display: none; }
  .site-nav {
    position: absolute;
    top: calc(100% + var(--space-2));
    right: 0;
    display: flex;
    flex-direction: column;
    gap: 0;
    background: var(--color-surface);
    border: 1px solid var(--color-hairline);
    border-radius: var(--radius);
    padding: var(--space-2) 0;
    min-width: 12rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    z-index: 100;
  }
  .site-nav a {
    padding: var(--space-3) var(--space-5);
    min-height: 44px;
    display: flex;
    align-items: center;
  }
  .site-nav a:hover { background: var(--color-bg); }
  /* On mobile, start closed: remove open attr via JS on load,
     but also hide via CSS as fallback */
  details.site-nav-toggle > nav { display: none !important; }
  details.site-nav-toggle[open] > nav { display: flex !important; flex-direction: column; }
  .site-header__phone { display: none; }
}

/* Mobile (≤560px) */
@media (max-width: 35rem) {
  .hero__stats { grid-template-columns: 1fr; }
  .sector-grid { grid-template-columns: 1fr; }
  .process-timeline { grid-template-columns: 1fr; }
  .hero__h1 { font-size: 2rem; }
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.5rem; }
  .page-hero h1 { font-size: 1.75rem; }
  .final-cta__title { font-size: 1.75rem; }
  .container { padding-inline: var(--space-4); }
  .btn { min-height: 44px; }
  .case-study-metrics { grid-template-columns: 1fr; }
  .result-card--headline output { font-size: var(--fs-2xl); }
  .calculator-teaser__inner { padding: var(--space-5); }
  .spec-table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
}

/* ==================================================================
   CROSS-PAGE COMPONENTS
   ================================================================== */

/* Page hero (smaller than homepage hero — product/sector/content pages) */
.page-hero {
  padding-block: var(--space-8) var(--space-7);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-hairline);
}
.page-hero h1 {
  font-size: var(--fs-3xl);
  margin-top: var(--space-3);
  max-width: 24ch;
}
.page-hero__sub {
  margin-top: var(--space-4);
  font-size: var(--fs-lg);
  color: var(--color-ink-muted);
  max-width: 58ch;
  line-height: 1.5;
}
.page-hero__meta {
  margin-top: var(--space-5);
  display: flex;
  gap: var(--space-5);
  flex-wrap: wrap;
  font-size: var(--fs-sm);
  color: var(--color-ink-muted);
}
.page-hero__meta dt {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}
.page-hero__meta dd {
  font-weight: 500;
  color: var(--color-ink);
  margin: 0;
}

/* Long-form prose container */
.prose {
  max-width: 40rem;
}
.prose > * + * { margin-top: var(--space-4); }
.prose h2 {
  margin-top: var(--space-7);
  font-size: var(--fs-2xl);
}
.prose h3 {
  margin-top: var(--space-5);
  font-size: var(--fs-xl);
  font-weight: 500;
}
.prose h4 {
  margin-top: var(--space-4);
}
.prose p,
.prose li {
  font-size: var(--fs-base);
  line-height: 1.65;
}
.prose ul,
.prose ol {
  padding-left: var(--space-5);
  display: block;
}
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li { margin-block: var(--space-2); }
.prose ul li::marker { color: var(--color-accent); }
.prose hr {
  border: none;
  border-top: 1px solid var(--color-hairline);
  margin-block: var(--space-6);
}
.prose blockquote {
  border-left: 2px solid var(--color-accent);
  padding-left: var(--space-4);
  font-size: var(--fs-lg);
  color: var(--color-ink);
  font-weight: 500;
  max-width: 44ch;
}

/* Two-column section (text + figure) */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: start;
}
.split--centered { align-items: center; }
.split__copy > * + * { margin-top: var(--space-4); }
.split__copy p { max-width: 46ch; line-height: 1.6; }

/* Spec / compatibility tables */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-sm);
  margin-block: var(--space-5);
}
.spec-table th,
.spec-table td {
  text-align: left;
  padding: var(--space-3);
  border-bottom: 1px solid var(--color-hairline);
  vertical-align: top;
}
.spec-table th {
  font-weight: 500;
  color: var(--color-ink-muted);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.spec-table tbody tr:last-child td { border-bottom: none; }
.spec-table .measurement { font-family: var(--font-mono); }

/* Generic card used for step/FAQ/detail blocks */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius);
  padding: var(--space-5);
}
.card + .card { margin-top: var(--space-4); }

/* Step blocks (process page — expanded version of homepage timeline) */
.step-block {
  display: grid;
  grid-template-columns: 4rem 1fr;
  gap: var(--space-5);
  padding-block: var(--space-6);
  border-top: 1px solid var(--color-hairline);
}
.step-block:first-of-type { border-top: none; padding-top: 0; }
.step-block__num {
  font-family: var(--font-mono);
  font-size: var(--fs-2xl);
  font-weight: 500;
  color: var(--color-ink);
  line-height: 1;
}
.step-block__body > * + * { margin-top: var(--space-3); }
.step-block__title { font-size: var(--fs-xl); font-weight: 500; }
.step-block__meta {
  display: flex;
  gap: var(--space-5);
  flex-wrap: wrap;
  font-size: var(--fs-xs);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
  margin-top: var(--space-3);
}
.step-block__meta strong {
  color: var(--color-ink);
  font-weight: 500;
}

/* FAQ — disclosure pattern */
.faq { margin-top: var(--space-6); }
.faq details {
  border-top: 1px solid var(--color-hairline);
  padding-block: var(--space-4);
}
.faq details:last-of-type { border-bottom: 1px solid var(--color-hairline); }
.faq summary {
  list-style: none;
  cursor: pointer;
  font-weight: 500;
  font-size: var(--fs-lg);
  color: var(--color-ink);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: var(--fs-xl);
  color: var(--color-accent);
  font-weight: 400;
  transition: transform var(--transition);
}
.faq details[open] summary::after {
  content: "−";
}
.faq details > div {
  margin-top: var(--space-3);
  color: var(--color-ink-muted);
  max-width: 56ch;
  line-height: 1.6;
}
.faq details > div > * + * { margin-top: var(--space-3); }

/* Install schematic SVG container (used on product page) */
.install-schematic {
  margin: 0;
  background: var(--color-bg);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius);
  padding: var(--space-5);
}
.install-schematic svg {
  width: 100%;
  height: auto;
  display: block;
}
.install-schematic figcaption {
  margin-top: var(--space-3);
  font-size: var(--fs-xs);
  color: var(--color-ink-muted);
  font-style: italic;
}

/* Form controls (calculator + contact) */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}
.form-group > label {
  font-weight: 500;
  font-size: var(--fs-sm);
  color: var(--color-ink);
}
.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group select,
.form-group textarea {
  padding: var(--space-3);
  border: 1px solid var(--color-hairline);
  background: var(--color-surface);
  border-radius: var(--radius);
  font-size: var(--fs-base);
  font-family: var(--font-sans);
  color: var(--color-ink);
  transition: border-color var(--transition);
  width: 100%;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(47, 125, 122, 0.15);
}
.form-group__hint {
  font-size: var(--fs-xs);
  color: var(--color-ink-muted);
  line-height: 1.4;
}
.form-group__inline {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}
.form-group__inline > * { flex: 1; min-width: 10rem; }
.form-toggle {
  display: inline-flex;
  border: 1px solid var(--color-hairline);
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: var(--space-1);
  gap: var(--space-1);
}
.form-toggle input { position: absolute; opacity: 0; pointer-events: none; }
.form-toggle label {
  padding: var(--space-2) var(--space-4);
  border-radius: calc(var(--radius) - 1px);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--color-ink-muted);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}
.form-toggle input:checked + label {
  background: var(--color-ink);
  color: var(--color-bg);
}

/* Disclosure (generic, used for calculator advanced view + how-it-works) */
.disclosure {
  margin-top: var(--space-5);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius);
  background: var(--color-surface);
}
.disclosure summary {
  list-style: none;
  cursor: pointer;
  padding: var(--space-4) var(--space-5);
  font-weight: 500;
  font-size: var(--fs-sm);
  color: var(--color-ink);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.disclosure summary::-webkit-details-marker { display: none; }
.disclosure summary::after {
  content: "↓";
  font-family: var(--font-mono);
  color: var(--color-accent);
  transition: transform var(--transition);
}
.disclosure[open] summary::after { transform: rotate(180deg); }
.disclosure > div {
  padding: var(--space-4) var(--space-5) var(--space-5);
  border-top: 1px solid var(--color-hairline);
}

/* Range pill (for calculator ranged outputs) */
.range-pill {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: var(--fs-2xl);
  color: var(--color-ink);
  line-height: 1.1;
}
.range-pill--roi { color: var(--color-roi); }
.range-pill + .range-pill__mid {
  margin-top: var(--space-2);
  font-size: var(--fs-xs);
  color: var(--color-ink-muted);
  font-family: var(--font-mono);
}

/* Breadcrumb (minimal, text-only) */
.breadcrumb {
  font-size: var(--fs-xs);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-4);
}
.breadcrumb a { color: var(--color-ink-muted); }
.breadcrumb a:hover { color: var(--color-ink); }
.breadcrumb__sep {
  margin-inline: var(--space-2);
  color: var(--color-hairline);
}

/* Case-study metrics panel — 4 big numbers in Plex Mono */
.case-study-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  margin-block: var(--space-6);
}
.case-study-metrics__item {
  background: var(--color-surface);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius);
  padding: var(--space-5);
}
.case-study-metrics__value {
  font-family: var(--font-mono);
  font-size: var(--fs-2xl);
  font-weight: 500;
  color: var(--color-ink);
  line-height: 1.1;
  margin-bottom: var(--space-3);
}
.case-study-metrics__value--roi { color: var(--color-roi); }
.case-study-metrics__label {
  font-size: var(--fs-xs);
  color: var(--color-ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  line-height: 1.4;
}
@media (max-width: 56.25rem) {
  .case-study-metrics { grid-template-columns: repeat(2, 1fr); }
}

/* Case study hub card */
.case-study-card {
  background: var(--color-surface);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius);
  padding: var(--space-6);
  transition: border-color var(--transition);
  display: block;
  color: var(--color-ink);
}
.case-study-card + .case-study-card { margin-top: var(--space-4); }
.case-study-card:hover { border-color: var(--color-ink); }
.case-study-card__meta {
  display: flex;
  gap: var(--space-3) var(--space-5);
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-4);
}
.case-study-card__title {
  font-size: var(--fs-xl);
  font-weight: 500;
  margin-bottom: var(--space-3);
  letter-spacing: -0.005em;
  line-height: var(--lh-snug);
  max-width: 40ch;
}
.case-study-card__headline {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--color-ink);
  margin-block: var(--space-4);
  padding-block: var(--space-3);
  border-block: 1px solid var(--color-hairline);
  display: flex;
  gap: var(--space-5);
  flex-wrap: wrap;
}
.case-study-card__headline strong { color: var(--color-ink); font-weight: 500; }
.case-study-card__headline .roi { color: var(--color-roi); }
.case-study-card__desc {
  color: var(--color-ink-muted);
  font-size: var(--fs-sm);
  max-width: 56ch;
  line-height: 1.55;
}
.case-study-card__cta {
  display: inline-block;
  margin-top: var(--space-4);
  color: var(--color-accent);
  font-size: var(--fs-sm);
  font-weight: 500;
}

/* Placeholder banner — used on v1 anonymised case studies */
.placeholder-banner {
  background: rgba(184, 115, 51, 0.08);
  border: 1px solid rgba(184, 115, 51, 0.3);
  border-radius: var(--radius);
  padding: var(--space-4) var(--space-5);
  margin-block: var(--space-5);
  font-size: var(--fs-sm);
  color: var(--color-ink);
}
.placeholder-banner strong { color: var(--color-roi); }

/* Savings calculator */
.calc-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 4fr);
  gap: var(--space-6);
  align-items: start;
}
.calc-form {
  background: var(--color-surface);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius);
  padding: var(--space-6);
}
.calc-fieldset {
  border: none;
  padding: 0;
  margin: 0 0 var(--space-5);
}
.calc-fieldset + .calc-fieldset {
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-hairline);
}
.calc-fieldset legend {
  margin-bottom: var(--space-4);
  padding: 0;
}

.calc-results {
  background: var(--color-surface);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius);
  padding: var(--space-6);
}
.result-card {
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--color-hairline);
  margin-bottom: var(--space-5);
}
.result-card--headline output {
  display: block;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: var(--fs-3xl);
  line-height: 1.05;
  margin-top: var(--space-2);
  color: var(--color-roi);
}
.result-card__sub {
  margin-top: var(--space-2);
  font-size: var(--fs-xs);
  color: var(--color-ink-muted);
  font-family: var(--font-mono);
}
.result-card__context {
  margin-top: var(--space-3);
  font-size: var(--fs-sm);
  color: var(--color-ink-muted);
}
.result-card__context output {
  font-family: var(--font-mono);
  color: var(--color-ink);
  font-weight: 500;
}

.result-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-3);
  padding-block: var(--space-3);
  border-top: 1px solid var(--color-hairline);
}
.result-row:first-of-type { border-top: none; padding-top: 0; }
.result-row__label {
  font-size: var(--fs-sm);
  color: var(--color-ink-muted);
}
.result-row__value {
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--color-ink);
  font-size: var(--fs-base);
}
.result-row__value.range-pill--roi { color: var(--color-roi); }
.result-row__sub {
  font-size: var(--fs-xs);
  color: var(--color-ink-muted);
  font-family: var(--font-mono);
  margin-top: calc(-1 * var(--space-2));
  margin-bottom: var(--space-2);
}
.result-note {
  margin-top: var(--space-5);
  padding: var(--space-4);
  background: var(--color-bg);
  border-radius: var(--radius);
  font-size: var(--fs-sm);
  color: var(--color-ink);
  line-height: 1.55;
  border-left: 2px solid var(--color-accent);
}
.result-note strong { color: var(--color-ink); }
.result-cta {
  margin-top: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.result-cta .btn { justify-content: center; }

.adv-sliders {
  margin-block: var(--space-5);
  padding: var(--space-5);
  background: var(--color-bg);
  border-radius: var(--radius);
  opacity: 0.5;
  transition: opacity var(--transition);
}
.adv-sliders--active { opacity: 1; }
.adv-sliders input[type="range"] {
  width: 100%;
  accent-color: var(--color-accent);
}

.formula-box {
  background: var(--color-bg);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius);
  padding: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  line-height: 1.7;
}
.formula-box > * + * { margin-top: var(--space-2); }
.formula-box strong { color: var(--color-accent); }

@media (max-width: 56.25rem) {
  .calc-grid { grid-template-columns: 1fr; }
}

/* Sector-page loads list — 2-col grid of load items */
.sector-loads {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3) var(--space-5);
  max-width: 44rem;
}
.sector-loads li {
  position: relative;
  padding-left: var(--space-5);
  line-height: 1.5;
  font-size: var(--fs-base);
}
.sector-loads li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 14px;
  height: 1px;
  background: var(--color-accent);
}
@media (max-width: 35rem) {
  .sector-loads { grid-template-columns: 1fr; }
}

/* Checklist (contact page + fit-check reuse) */
.checklist {
  display: grid;
  gap: var(--space-3);
}
.checklist li {
  position: relative;
  padding-left: var(--space-5);
}
.checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 14px;
  height: 1px;
  background: var(--color-accent);
}

/* Small responsive tweaks for cross-page components */
@media (max-width: 56.25rem) {
  .split { grid-template-columns: 1fr; gap: var(--space-6); }
  .page-hero h1 { font-size: 2.25rem; }
  .step-block { grid-template-columns: 3rem 1fr; gap: var(--space-4); }
}

/* ==================================================================
   MOTION
   ================================================================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}