/* Soudarshini Valve. Paper ground, hairlines, one accent. */

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

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

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-weight: 400;
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--colour-text);
  background: var(--colour-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--colour-link);
  text-decoration: none;
}

a:hover {
  color: var(--colour-primary-hover);
  text-decoration: underline;
}

h1,
h2,
h3,
h4 {
  font-weight: 700;
  color: var(--colour-grey-900);
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin: 0;
  /* keep headlines off ragged last-word orphans */
  text-wrap: balance;
}

h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  /* slightly tighter optical kern at display size */
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.7rem, 3.2vw, 2.4rem);
}

h3 {
  font-size: 1.3rem;
}

p {
  margin: 0 0 1.2em;
  /* avoid single-word last lines (widows) in body copy */
  text-wrap: pretty;
}

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

.tnum {
  font-variant-numeric: tabular-nums;
}

/* ---- Layout primitives ---- */
.wrap {
  width: 100%;
  max-width: 1140px;
  margin-inline: auto;
  padding-inline: 28px;
}

.wrap-narrow {
  max-width: 760px;
}

section {
  padding-block: clamp(48px, 7vw, 84px);
}

.section-divider {
  border: 0;
  border-top: 1px solid var(--colour-border);
  margin: 0;
}

.eyebrow {
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--colour-primary);
  margin: 0 0 18px;
}

.lede {
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  line-height: 1.6;
  color: var(--colour-text);
  max-width: 56ch;
}

.section-head {
  max-width: 60ch;
  margin-bottom: clamp(28px, 4vw, 44px);
}

.section-head p {
  margin-top: 18px;
  color: var(--colour-text-muted);
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1rem;
  line-height: 1;
  padding: 16px 28px;
  border-radius: 2px;
  border: 1px solid var(--colour-primary);
  background: var(--colour-primary);
  color: var(--colour-on-primary);
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.btn:hover {
  background: var(--colour-primary-hover);
  border-color: var(--colour-primary-hover);
  color: var(--colour-on-primary);
  text-decoration: none;
}

.btn:focus-visible {
  outline: 3px solid var(--colour-primary-active);
  outline-offset: 3px;
}

.btn-ghost {
  background: transparent;
  color: var(--colour-primary);
}

.btn-ghost:hover {
  background: var(--colour-primary-subtle);
  color: var(--colour-primary-active);
}

.btn-on-dark {
  border-color: var(--colour-white);
  background: var(--colour-white);
  color: var(--colour-navy);
}

.btn-on-dark:hover {
  background: var(--colour-off-white);
  border-color: var(--colour-off-white);
  color: var(--colour-navy);
}

/* ---- Header ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--colour-bg) 92%, transparent);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--colour-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 76px;
  padding-block: 12px;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand-link img {
  height: 38px;
  width: auto;
}

/* SERINO brand mark + Soudarshini company wordmark, locked up side by side.
   The mark is a real transparent PNG supplied by the client, so it needs no
   blend-mode workaround and sits correctly on any ground. */
.brand-link .brand-serino {
  height: 27px;
}

.brand-link .brand-wordmark {
  height: 33px;
}

.brand-divider {
  width: 1px;
  height: 25px;
  background: var(--colour-border);
  flex: none;
}

@media (max-width: 480px) {
  .brand-link {
    gap: 9px;
  }

  .brand-link .brand-serino {
    height: 21px;
  }

  .brand-link .brand-wordmark {
    height: 26px;
  }

  .brand-divider {
    height: 20px;
  }
}

.brand-link:hover {
  text-decoration: none;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.primary-nav a {
  white-space: nowrap;
}

.primary-nav a:not(.btn) {
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--colour-text);
}

.primary-nav a:not(.btn):hover,
.primary-nav a[aria-current="page"] {
  color: var(--colour-primary);
  text-decoration: none;
}

.primary-nav a[aria-current="page"] {
  font-weight: 700;
}

.nav-cta {
  padding: 11px 20px;
  font-size: 0.95rem;
}

/* Mobile nav toggle (hidden-checkbox pattern, no JS) */
.nav-toggle,
.nav-toggle-label {
  display: none;
}

@media (max-width: 1199px) {
  .nav-toggle-label {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    cursor: pointer;
    padding: 10px;
  }

  .nav-toggle-label span {
    display: block;
    height: 2px;
    background: var(--colour-grey-900);
    border-radius: 2px;
  }

  .nav-toggle-label:focus-visible {
    outline: 3px solid var(--colour-primary);
    outline-offset: 2px;
  }

  .primary-nav {
    position: fixed;
    inset: 76px 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--colour-bg);
    border-bottom: 1px solid var(--colour-border);
    padding: 12px 28px 28px;
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    transition: max-height 0.25s ease;
  }

  .nav-toggle:checked ~ .primary-nav {
    max-height: 80vh;
    visibility: visible;
    overflow: auto;
  }

  .primary-nav a:not(.btn) {
    padding: 14px 0;
    border-bottom: 1px solid var(--colour-border);
    font-size: 1.05rem;
  }

  .primary-nav .nav-cta {
    margin-top: 18px;
    align-self: flex-start;
  }
}

/* ---- Hero ---- */
.hero {
  padding-block: clamp(48px, 7vw, 84px);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(40px, 6vw, 80px);
  align-items: center;
}

.hero-copy h1 {
  margin-bottom: 24px;
}

.hero-copy .lede {
  margin-bottom: 36px;
}

.hero-media img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: 2px;
}

@media (max-width: 820px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .hero-media {
    order: -1;
  }

  .hero-media img {
    aspect-ratio: 16 / 10;
  }
}

/* ---- At-a-glance grids ---- */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  /* Rows tightened on the client's own mark-up of the sector list: the 64px row gap
     left a visible hole between one sector's description and the next sector's rule.
     Columns keep their original separation. */
  gap: clamp(22px, 3.5vw, 40px) clamp(32px, 5vw, 64px);
  align-items: start;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(28px, 4vw, 48px);
  align-items: start;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(28px, 4vw, 56px) clamp(32px, 5vw, 64px);
  align-items: start;
}

@media (max-width: 820px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* product/feature item — hairline top rule, no card */
.line-item {
  border-top: 2px solid var(--colour-grey-900);
  padding-top: 22px;
}

.line-item h3 {
  margin-bottom: 10px;
}

.line-item p {
  color: var(--colour-text);
}

.line-item .meta {
  font-size: 0.9rem;
  color: var(--colour-text-muted);
  margin-top: 14px;
}

/* featured product line — the plug valve, our core specialisation.
   Same hairline-rule idiom as .line-item, but a heavier rule in the primary
   blue so primacy reads at a glance without introducing a card or a new hue. */
.feature-line {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(32px, 5vw, 64px);
  align-items: center;
  border-top: 3px solid var(--colour-primary);
  padding-top: 28px;
}

.feature-line-copy h3 {
  font-size: clamp(1.4rem, 2.4vw, 1.75rem);
  margin-bottom: 18px;
}

.feature-line-copy .lede {
  margin-bottom: 1.2em;
}

.feature-line-copy p {
  color: var(--colour-text);
}

.feature-line-copy .meta {
  font-size: 0.9rem;
  color: var(--colour-text-muted);
  margin-top: 20px;
  margin-bottom: 0;
}

.feature-line-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 2px;
}

/* transition into the supporting three lines */
.feature-line-note {
  margin-top: clamp(28px, 4vw, 44px);
  margin-bottom: clamp(22px, 3vw, 34px);
  color: var(--colour-text-muted);
}

@media (max-width: 820px) {
  .feature-line {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  /* lead with the valve itself on a narrow screen */
  .feature-line-media {
    order: -1;
  }
}

/* ---- Spec tables (datasheet) ---- */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
  margin-block: 8px 0;
}

.spec-table caption {
  text-align: left;
  font-weight: 700;
  color: var(--colour-grey-900);
  font-size: 1.05rem;
  padding-bottom: 14px;
}

.spec-table th,
.spec-table td {
  text-align: left;
  vertical-align: top;
  padding: 13px 18px 13px 0;
  border-bottom: 1px solid var(--colour-border);
  line-height: 1.5;
}

.spec-table th {
  font-weight: 700;
  color: var(--colour-grey-900);
  white-space: nowrap;
  width: 38%;
  padding-right: 28px;
}

.spec-table td {
  color: var(--colour-text);
}

.spec-table tr:first-child th,
.spec-table tr:first-child td {
  border-top: 2px solid var(--colour-grey-900);
}

/* ---- Product block (page) ---- */
.product-block {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(36px, 5vw, 72px);
  align-items: start;
}

.product-block + .product-block {
  margin-top: clamp(44px, 6vw, 76px);
  padding-top: clamp(64px, 9vw, 112px);
  border-top: 1px solid var(--colour-border);
}

.product-block .pb-media {
  display: grid;
  gap: 14px;
}
.product-block .pb-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 2px;
}

.product-block .pb-title {
  margin-bottom: 8px;
}

.product-block .pb-standards {
  font-size: 0.95rem;
  color: var(--colour-text-muted);
  margin-bottom: 22px;
}

@media (max-width: 820px) {
  .product-block {
    grid-template-columns: 1fr;
  }
}

/* ---- Dark standards strip ---- */
.band-dark {
  background: var(--colour-navy);
  color: var(--colour-on-dark);
}

.band-dark h2,
.band-dark h3 {
  color: var(--colour-white);
}

.band-dark .eyebrow {
  color: var(--colour-white);
  opacity: 0.7;
}

.band-dark .standards-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.band-dark .standards-list li {
  background: var(--colour-navy);
  padding: 28px 24px;
}

.band-dark .standards-list .std-code {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--colour-white);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

.band-dark .standards-list .std-label {
  display: block;
  margin-top: 8px;
  font-size: 0.9rem;
  color: var(--colour-on-dark);
}

@media (max-width: 820px) {
  .band-dark .standards-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 460px) {
  .band-dark .standards-list {
    grid-template-columns: 1fr;
  }
}

/* ---- Credibility anchor ---- */
.anchor-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(36px, 5vw, 72px);
  align-items: center;
}

.anchor-grid .anchor-media img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 2px;
}

@media (max-width: 820px) {
  .anchor-grid {
    grid-template-columns: 1fr;
  }
}

/* ---- Credential / fact list ---- */
.fact-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.fact-list li {
  padding: 16px 0 16px 28px;
  border-bottom: 1px solid var(--colour-border);
  position: relative;
}

.fact-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 26px;
  width: 12px;
  height: 1px;
  background: var(--colour-primary);
}

.fact-list li:first-child {
  border-top: 1px solid var(--colour-border);
}

/* ---- Sectors ---- */
.sector-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0 clamp(32px, 5vw, 64px);
}

.sector-list li {
  padding: 20px 0;
  border-bottom: 1px solid var(--colour-border);
  font-size: 1.1rem;
  color: var(--colour-grey-900);
  display: flex;
  align-items: baseline;
  gap: 16px;
}

.sector-list .sec-num {
  font-variant-numeric: tabular-nums;
  font-size: 0.85rem;
  color: var(--colour-text-muted);
  min-width: 28px;
}

@media (max-width: 600px) {
  .sector-list {
    grid-template-columns: 1fr;
  }
}

/* sectors with detail */
.sector-detail {
  border-top: 2px solid var(--colour-grey-900);
  padding-top: 22px;
}

.sector-detail h2,
.sector-detail h3 {
  font-size: 1.3rem;
  margin-bottom: 8px;
}

.sector-detail p {
  color: var(--colour-text-muted);
}

/* ---- Surface block (alt) ---- */
.surface {
  background: var(--colour-surface);
}

/* On the slightly darker surface band, muted text must clear AA 4.5:1.
   #737373 falls to 4.34 on #f5f5f5; #6b6b6b restores 4.89 while staying
   inside the near-mono grey ramp. */
.surface .text-muted,
.surface .eyebrow,
.surface .cta-closing p,
.surface .section-head p,
.surface figcaption,
.surface .spec-note,
.surface .caption {
  color: #6b6b6b;
}

/* ---- Closing CTA ---- */
.cta-closing {
  text-align: center;
}

.cta-closing h2 {
  margin-bottom: 20px;
}

.cta-closing p {
  margin-inline: auto;
  margin-bottom: 36px;
  max-width: 52ch;
  color: var(--colour-text-muted);
}

/* ---- Page hero (interior) ---- */
.page-hero {
  padding-block: clamp(48px, 7vw, 84px) clamp(32px, 4vw, 48px);
}

.page-hero .lede {
  margin-top: 24px;
}

/* ---- Manufacturing plant images ---- */
.plant-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 18px;
}

.plant-grid img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 2px;
  grid-column: span 2;
}

/* The two establishing shots lead the gallery at half width each; the three
   machine portraits sit three-up beneath them. Five tiles divide evenly this
   way, so no tile is left orphaned on a row of its own. */
.plant-grid img:nth-child(1),
.plant-grid img:nth-child(2) {
  grid-column: span 3;
}

@media (max-width: 900px) {
  .plant-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .plant-grid img,
  .plant-grid img:nth-child(1),
  .plant-grid img:nth-child(2) {
    grid-column: span 1;
  }

  /* an odd final tile runs full width rather than sitting half-empty */
  .plant-grid img:nth-child(odd):last-child {
    grid-column: span 2;
  }
}

@media (max-width: 720px) {
  .plant-grid {
    grid-template-columns: 1fr;
  }

  /* Single column here, so every tile spans the one track. Without this the
     span rules above survive into this breakpoint, conjure a second implicit
     column and collapse the tiles that land in the first one to zero width. */
  .plant-grid img,
  .plant-grid img:nth-child(1),
  .plant-grid img:nth-child(2),
  .plant-grid img:nth-child(odd):last-child {
    grid-column: span 1;
  }
}

/* ---- Process steps ---- */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: step;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  background: var(--colour-border);
  border: 1px solid var(--colour-border);
}

.steps li {
  counter-increment: step;
  background: var(--colour-bg);
  padding: 28px 22px;
}

.steps li::before {
  content: counter(step, decimal-leading-zero);
  display: block;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--colour-primary);
  margin-bottom: 12px;
}

.steps li strong {
  display: block;
  color: var(--colour-grey-900);
  font-size: 1.05rem;
  margin-bottom: 6px;
}

.steps li span {
  font-size: 0.92rem;
  color: var(--colour-text-muted);
}

@media (max-width: 900px) {
  .steps {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .steps {
    grid-template-columns: 1fr;
  }
}

/* ---- Leadership ---- */
.leader-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(36px, 5vw, 72px);
  align-items: start;
}

.leader-grid .leader-media img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: 2px;
}

.leader-name {
  margin-bottom: 4px;
}

.leader-role {
  color: var(--colour-primary);
  font-weight: 700;
  margin-bottom: 24px;
}

@media (max-width: 820px) {
  .leader-grid {
    grid-template-columns: 1fr;
  }
}

/* ---- Contact ---- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(40px, 6vw, 80px);
  align-items: start;
}

@media (max-width: 820px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

.contact-detail h2 {
  font-size: 1rem;
  margin-bottom: 6px;
}

.contact-detail + .contact-detail {
  margin-top: 32px;
}

.contact-detail address {
  font-style: normal;
  color: var(--colour-text);
}

.form-row {
  margin-bottom: 22px;
}

.form-row label {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--colour-grey-900);
  margin-bottom: 8px;
}

.form-row input,
.form-row textarea {
  width: 100%;
  font-family: inherit;
  font-size: 1rem;
  color: var(--colour-text);
  background: var(--colour-white);
  border: 1px solid var(--colour-border);
  border-radius: 2px;
  padding: 13px 14px;
}

.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--colour-primary);
  box-shadow: 0 0 0 1px var(--colour-primary);
}

.form-row textarea {
  resize: vertical;
  min-height: 120px;
}

.form-note {
  font-size: 0.85rem;
  color: var(--colour-text-muted);
  margin-top: 18px;
}

/* ---- Footer ---- */
.site-footer {
  background: var(--colour-navy);
  color: var(--colour-on-dark);
  padding-block: clamp(40px, 6vw, 62px) 32px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: clamp(32px, 5vw, 64px);
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.footer-brand img {
  height: 40px;
  width: auto;
  margin-bottom: 20px;
}

.footer-brand p {
  color: var(--colour-on-dark);
  max-width: 36ch;
  font-size: 0.95rem;
}

.footer-col h2 {
  color: var(--colour-white);
  font-size: 0.85rem;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 18px;
}

.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-col li {
  margin-bottom: 12px;
}

.footer-col a,
.footer-col address {
  color: var(--colour-on-dark);
  font-size: 0.95rem;
  font-style: normal;
}

.footer-col a:hover {
  color: var(--colour-white);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding-top: 28px;
  font-size: 0.85rem;
  color: var(--colour-on-dark);
}

.footer-bottom a {
  color: var(--colour-white);
}

@media (max-width: 760px) {
  .footer-top {
    grid-template-columns: 1fr;
    gap: 36px;
  }
}

/* ---- Contact dock (pure CSS, no JS) ---- */
.dock {
  position: fixed;
  right: max(18px, env(safe-area-inset-right));
  bottom: max(18px, env(safe-area-inset-bottom));
  z-index: 60;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 12px;
}

.dock-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transform: translateY(8px);
  transition: max-height 0.2s ease, opacity 0.2s ease, transform 0.2s ease;
}

.dock-toggle:checked ~ .dock-actions {
  max-height: 200px;
  opacity: 1;
  transform: translateY(0);
}

.dock-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--colour-white);
  background: var(--colour-navy);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.dock-btn:hover {
  color: var(--colour-white);
  text-decoration: none;
  background: var(--colour-grey-900);
}

.dock-btn.is-wa {
  background: #128c7e;
  border-color: #128c7e;
}

.dock-btn.is-wa:hover {
  background: #0f7d70;
}

.dock-btn svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.dock-toggle {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
}

.dock-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--colour-on-primary);
  background: var(--colour-primary);
  cursor: pointer;
  user-select: none;
}

.dock-label:hover {
  background: var(--colour-primary-hover);
}

.dock-toggle:focus-visible ~ .dock-label {
  outline: 3px solid var(--colour-primary-active);
  outline-offset: 3px;
}

.dock-label svg {
  width: 20px;
  height: 20px;
}

.dock-label .dock-close {
  display: none;
}

.dock-toggle:checked ~ .dock-label .dock-open {
  display: none;
}

.dock-toggle:checked ~ .dock-label .dock-close {
  display: inline;
}

@media (max-width: 520px) {
  .dock-btn span,
  .dock-label span {
    display: none;
  }

  .dock-btn,
  .dock-label {
    padding: 14px;
    border-radius: 999px;
  }
}

/* ---- Utilities ---- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
}

.skip-link:focus {
  left: 16px;
  top: 16px;
  z-index: 100;
  background: var(--colour-navy);
  color: var(--colour-white);
  padding: 10px 16px;
  border-radius: 2px;
}

.mt-block {
  margin-top: clamp(32px, 5vw, 56px);
}

.measure {
  max-width: 64ch;
}

/* sub-heading introducing a fact-list block within a section */
.block-head {
  margin-bottom: clamp(16px, 2vw, 24px);
}

/* ---- Found-ready FAQ accordion ----
   The generated markup carries only .se-faq* class hooks and no layout wrapper, so the width
   constraint and rhythm are set here rather than inherited from .wrap. Zero JS: native <details>,
   which keeps every answer in the DOM for crawlers and costs nothing on Core Web Vitals. */
.se-faq {
  width: 100%;
  max-width: 860px;
  margin-inline: auto;
  padding-inline: 28px;
  padding-block: clamp(48px, 7vw, 84px);
}

.se-faq__title {
  margin: 0 0 clamp(20px, 3vw, 32px);
}

.se-faq__item {
  border-bottom: 1px solid var(--colour-border);
}

.se-faq__item:first-of-type {
  border-top: 1px solid var(--colour-border);
}

.se-faq__q {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 0;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--colour-navy);
  cursor: pointer;
  list-style: none;
  transition: color 0.15s ease;
}

.se-faq__q::-webkit-details-marker {
  display: none;
}

/* The +/− affordance replaces the native marker so the question text stays one clean column. */
.se-faq__q::after {
  content: "+";
  flex: none;
  font-size: 1.4rem;
  font-weight: 400;
  line-height: 1;
  color: var(--colour-primary);
}

.se-faq__item[open] > .se-faq__q::after {
  content: "\2212";
}

.se-faq__q:hover,
.se-faq__q:focus-visible {
  color: var(--colour-primary);
}

.se-faq__a {
  padding: 0 0 26px;
  max-width: 64ch;
  color: var(--colour-text-muted);
}

/* ---- Respect reduced-motion preference ---- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---- Certificate gallery (zero-JS :target lightbox) ---- */
.cert-group + .cert-group {
  margin-top: clamp(32px, 5vw, 56px);
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: clamp(20px, 2.6vw, 32px);
  margin-top: 28px;
}

.cert-card {
  display: block;
  text-decoration: none;
  color: inherit;
}

.cert-card img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: contain;
  padding: 8px;
  background: var(--colour-white);
  border: 1px solid var(--colour-border);
  border-radius: 2px;
  transition: border-color 0.15s ease;
}

.cert-card:hover img,
.cert-card:focus-visible img {
  border-color: var(--colour-primary);
}

.cert-card .cert-name {
  display: block;
  margin-top: 12px;
  font-size: 0.95rem;
  font-weight: 700;
}

.cert-card .cert-meta {
  display: block;
  margin-top: 2px;
  font-size: 0.87rem;
  color: var(--colour-text-muted);
}

.cert-view {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: none;
  align-items: center;
  justify-content: center;
  padding: clamp(16px, 4vw, 48px);
  background: rgba(20, 24, 27, 0.93);
}

.cert-view:target {
  display: flex;
}

.cert-view img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  object-fit: contain;
  background: var(--colour-white);
  border-radius: 2px;
}

.cert-view .cert-close {
  position: absolute;
  top: clamp(12px, 2.4vw, 24px);
  right: clamp(12px, 2.4vw, 24px);
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--colour-white);
  background: rgba(255, 255, 255, 0.12);
  border-radius: 2px;
  text-decoration: none;
}

.cert-view .cert-close:hover,
.cert-view .cert-close:focus-visible {
  background: rgba(255, 255, 255, 0.24);
}

/* ---- Serino wordmark block ---- */
.serino-mark {
  max-width: 260px;
  width: 100%;
  height: auto;
  display: block;
}

/* ---- On-this-page sub-nav (long pages like About Us) ---- */
.page-subnav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--colour-border);
}

.page-subnav a {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--colour-text);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  padding-bottom: 2px;
}

.page-subnav a:hover,
.page-subnav a:focus-visible {
  color: var(--colour-primary);
  border-bottom-color: var(--colour-primary);
}

/* the header is sticky, so any anchored section must clear it */
section[id] {
  scroll-margin-top: 96px;
}

/* ============================================================
   Change chg-5b195819 — dropdown nav, banner hero, clients,
   facility & testing cards
   ============================================================ */

/* ---- Nav dropdowns (CSS only, no JS) ---- */
.nav-item {
  position: relative;
  display: flex;
  align-items: center;
}

.nav-item > a::after {
  content: "";
  display: inline-block;
  width: 0.42em;
  height: 0.42em;
  margin-left: 0.5em;
  vertical-align: 0.16em;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg);
  opacity: 0.55;
}

.nav-sub {
  list-style: none;
  margin: 0;
  padding: 0;
}

@media (min-width: 1141px) {
  .nav-sub {
    position: absolute;
    top: 100%;
    left: -18px;
    min-width: 220px;
    padding: 10px 0;
    background: var(--colour-white);
    border: 1px solid var(--colour-border);
    border-radius: 3px;
    box-shadow: 0 12px 28px rgba(20, 24, 27, 0.12);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: opacity 0.15s ease, transform 0.15s ease, visibility 0.15s;
  }

  /* a hover bridge so the pointer can cross the header padding */
  .nav-item::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    height: 18px;
  }

  .nav-item:hover .nav-sub,
  .nav-item:focus-within .nav-sub {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .primary-nav .nav-sub a {
    display: block;
    padding: 9px 20px;
    font-size: 0.92rem;
    white-space: nowrap;
  }

  .primary-nav .nav-sub a:hover,
  .primary-nav .nav-sub a:focus-visible {
    background: var(--colour-primary-subtle);
    color: var(--colour-primary);
  }
}

@media (max-width: 1199px) {
  .nav-item {
    display: block;
  }

  .nav-item > a::after {
    display: none;
  }

  .primary-nav .nav-sub a:not(.btn) {
    padding: 11px 0 11px 18px;
    font-size: 0.97rem;
    color: var(--colour-text-muted);
  }
}

/* ---- Home: full-width banner hero ---- */
/* The banner stacks image and copy in one grid cell, so the section is always
   as tall as whichever is taller. An absolutely-positioned overlay could not
   grow with its own text and clipped the headline. */
.hero-banner {
  position: relative;
  padding: 0;
  background: var(--colour-bg);
  display: grid;
}

.hero-banner > picture {
  grid-area: 1 / 1;
  display: block;
  min-height: clamp(400px, 34vw, 640px);
}

.hero-banner-media {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 62% center;
}

.hero-banner-copy {
  grid-area: 1 / 1;
  display: flex;
  align-items: center;
  padding-block: clamp(20px, 3vw, 40px);
  pointer-events: none;
}

.hero-banner-copy > .wrap {
  width: 100%;
}

.hero-banner-inner {
  max-width: 33rem;
  pointer-events: auto;
}

.hero-banner-inner h1 {
  margin-top: 6px;
  font-size: clamp(1.6rem, 2.6vw, 2.4rem);
  line-height: 1.14;
}

.hero-banner-inner .lede {
  max-width: 29rem;
  margin-top: 14px;
}

.hero-banner-inner .btn {
  margin-top: 20px;
}

@media (max-width: 860px) {
  .hero-banner {
    display: flex;
    flex-direction: column-reverse;
  }

  .hero-banner > picture {
    min-height: 0;
  }

  .hero-banner-media {
    height: auto;
    aspect-ratio: 8 / 7;
    object-position: center;
  }

  .hero-banner-copy {
    padding-block: clamp(24px, 5vw, 40px);
  }

  .hero-banner-inner {
    max-width: none;
  }
}

/* ---- Home: quick stat strip (replaces a wall of prose) ---- */
.stat-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(20px, 3vw, 40px);
  margin-top: 8px;
}

.stat-strip div {
  border-top: 2px solid var(--colour-primary);
  padding-top: 14px;
}

.stat-strip .stat-figure {
  display: block;
  font-size: clamp(1.5rem, 2.4vw, 2.1rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--colour-navy);
}

.stat-strip .stat-label {
  display: block;
  margin-top: 4px;
  font-size: 0.92rem;
  color: var(--colour-text-muted);
}

.stat-strip.is-pair {
  grid-template-columns: repeat(2, 1fr);
  max-width: 38rem;
}

@media (max-width: 760px) {
  .stat-strip {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ---- Clients: logo wall ---- */
.logo-wall {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  margin-top: 32px;
  background: var(--colour-border);
  border: 1px solid var(--colour-border);
}

.logo-wall li {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--colour-white);
  padding: 20px 24px;
  min-height: 132px;
}

.logo-wall img {
  width: 100%;
  max-width: 172px;
  height: 86px;
  object-fit: contain;
  mix-blend-mode: multiply;
}

@media (max-width: 1000px) {
  .logo-wall {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 620px) {
  .logo-wall {
    grid-template-columns: repeat(2, 1fr);
  }

  .logo-wall li {
    min-height: 104px;
  }
}

/* ---- Facility & testing cards ---- */
.facility-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(24px, 3vw, 40px);
  margin-top: 32px;
}

.facility-grid.is-pair {
  grid-template-columns: repeat(2, 1fr);
}

.facility-card figure {
  margin: 0;
}

.facility-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--colour-border);
  border-radius: 2px;
  background: var(--colour-white);
}

.facility-card h3 {
  margin-top: 14px;
  font-size: 1.05rem;
}

.facility-card p {
  margin-top: 4px;
  font-size: 0.94rem;
  color: var(--colour-text-muted);
}

@media (max-width: 900px) {
  .facility-grid,
  .facility-grid.is-pair {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .facility-grid,
  .facility-grid.is-pair {
    grid-template-columns: 1fr;
  }
}

.facility-wide img {
  width: 100%;
  height: auto;
  border: 1px solid var(--colour-border);
  border-radius: 2px;
  background: var(--colour-white);
}

.facility-wide figcaption {
  margin-top: 10px;
  font-size: 0.9rem;
  color: var(--colour-text-muted);
}

/* ---- Press / event photographs (About Us profile) ---- */
.press-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(20px, 2.6vw, 32px);
  margin-top: 32px;
}

.press-row figure {
  margin: 0;
}

.press-row img {
  width: 100%;
  height: auto;
  aspect-ratio: 426 / 238;
  object-fit: cover;
  border: 1px solid var(--colour-border);
  border-radius: 2px;
}

.press-row figcaption {
  margin-top: 10px;
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--colour-text-muted);
}

@media (max-width: 760px) {
  .press-row {
    grid-template-columns: 1fr;
    max-width: 30rem;
  }
}

/* anchored sections that are not <section> still need to clear the sticky header */
article[id],
div[id].anchor-target {
  scroll-margin-top: 96px;
}