/* ============================================================
   Webmech (Pty) Ltd — site styles
   Locked design tokens per build brief §4 — DO NOT MODIFY
   ============================================================ */

/* ---- Tokens ---- */
:root {
  /* Brand (locked from WMS/SEQ/GDE004) */
  --color-brand-green: #39A935;
  --color-brand-light-green: #93C01F;
  --color-brand-grey: #6F6F6E;
  /* Accessibility-tuned variant of brand-green for body-text use on white.
     #39A935 on #FFFFFF only achieves ~3.46:1 (passes AA for large/bold,
     fails AA for small body text). #2D8A2A passes 4.5:1.
     Use --color-brand-green for fills, large headings and >=18pt;
     use --color-brand-green-text for inline links and small text on white. */
  --color-brand-green-text: #2D8A2A;

  /* Functional palette */
  --color-bg: #FFFFFF;
  --color-bg-alt: #F6F7F5;
  --color-bg-dark: #1A1A1C;
  --color-bg-dark-alt: #2A2A2D;
  --color-text: #1A1A1C;
  --color-text-muted: #6F6F6E;
  --color-text-on-dark: #FFFFFF;
  --color-text-on-dark-muted: #B8B8B6;
  --color-border: #E5E5E2;
  --color-success: #39A935;
  --color-danger: #C0392B;

  /* Gradients & overlays */
  --gradient-brand: linear-gradient(135deg, #39A935 0%, #93C01F 100%);
  --overlay-dark: linear-gradient(180deg, rgba(26,26,28,0) 0%, rgba(26,26,28,0.85) 100%);

  /* Type */
  --font-sans: 'Inter', 'Arial Narrow', Arial, system-ui, sans-serif;
  --fs-h1: clamp(2.25rem, 5vw, 4rem);
  --fs-h2: clamp(1.75rem, 3.5vw, 2.75rem);
  --fs-h3: clamp(1.25rem, 2.5vw, 1.75rem);
  --fs-body: 1rem;
  --fs-small: 0.875rem;
  --lh-tight: 1.1;
  --lh-normal: 1.55;

  /* Space */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --space-7: 5rem;
  --space-8: 8rem;

  /* Radii / shadow / motion / layout */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
  --container-max: 1280px;
  --container-narrow: 880px;
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --header-h: 88px;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-normal);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img, svg, video { max-width: 100%; height: auto; display: block; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: var(--color-brand-green); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--color-brand-light-green); }

/* Headlines: bold, uppercase tracking 0.02em per brand */
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--space-3);
  line-height: var(--lh-tight);
  font-weight: 700;
  letter-spacing: 0.02em;
}
h1 { font-size: var(--fs-h1); text-transform: uppercase; }
h2 { font-size: var(--fs-h2); text-transform: uppercase; }
h3 { font-size: var(--fs-h3); }
p  { margin: 0 0 var(--space-3); }

/* Skip link for keyboard users */
.skip-to-content {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark);
  padding: var(--space-2) var(--space-3);
  z-index: 1000;
}
.skip-to-content:focus { left: 0; }

/* ---- Layout helpers ---- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-4);
}
.container--narrow { max-width: var(--container-narrow); }
.section { padding-block: var(--space-7); }
.section--alt { background: var(--color-bg-alt); }
.section--dark { background: var(--color-bg-dark); color: var(--color-text-on-dark); }
.section--dark h1, .section--dark h2, .section--dark h3 { color: var(--color-text-on-dark); }
.section--dark a { color: var(--color-brand-light-green); }
.section--brand { background: var(--gradient-brand); color: var(--color-text-on-dark); }
.section--brand h1, .section--brand h2, .section--brand h3 { color: var(--color-text-on-dark); }
.section-eyebrow {
  display: inline-block;
  font-size: var(--fs-small);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-brand-green);
  margin-bottom: var(--space-3);
}
.section--dark .section-eyebrow { color: var(--color-brand-light-green); }

.grid { display: grid; gap: var(--space-4); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 900px) {
  .grid--3 { grid-template-columns: 1fr; }
  .grid--2 { grid-template-columns: 1fr; }
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  min-height: 44px;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: var(--fs-small);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
  text-decoration: none;
}
.btn:focus-visible { outline: 3px solid var(--color-brand-light-green); outline-offset: 2px; }
.btn--primary {
  background: var(--color-brand-green);
  color: #fff;
  border-color: var(--color-brand-green);
}
.btn--primary:hover { background: var(--color-brand-light-green); border-color: var(--color-brand-light-green); color: #fff; }
.btn--secondary {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-text);
}
.btn--secondary:hover { background: var(--color-text); color: #fff; }
.section--dark .btn--secondary,
.hero .btn--secondary {
  color: #fff;
  border-color: rgba(255,255,255,0.5);
  background: rgba(255,255,255,0.08);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.section--dark .btn--secondary:hover,
.hero .btn--secondary:hover {
  background: #fff;
  color: var(--color-text);
  border-color: #fff;
}
.btn--ghost {
  background: transparent;
  border: none;
  color: var(--color-brand-green-text);
  padding-inline: 0;
  text-transform: none;
  letter-spacing: 0;
  font-size: var(--fs-body);
}
.btn--ghost::after { content: " \2192"; transition: transform var(--transition-fast); display: inline-block; }
.btn--ghost:hover::after { transform: translateX(5px); }
.btn--ghost:focus-visible { outline: 3px solid var(--color-brand-light-green); outline-offset: 4px; }

/* ---- Header & nav ---- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--header-h);
  z-index: 100;
  transition: background var(--transition-base), box-shadow var(--transition-base);
  background: transparent;
}
.site-header.is-scrolled,
.site-header.is-solid {
  background: rgba(255,255,255,0.96);
  backdrop-filter: saturate(180%) blur(8px);
  box-shadow: var(--shadow-sm);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-4);
}
.site-header__logo img { height: 64px; width: auto; }
/* Header logo: always show in original brand colours.
   (was previously inverted-to-white when over the dark hero — change per brand request.) */

.site-nav { display: flex; align-items: center; gap: var(--space-5); }
.site-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  margin: 0;
  padding: 0;
  list-style: none;
}
.site-nav__link {
  color: #fff;
  font-weight: 500;
  font-size: 0.95rem;
  padding: var(--space-2) 0;
  position: relative;
  text-decoration: none;
  transition: color var(--transition-fast);
}
.site-header.is-scrolled .site-nav__link,
.site-header.is-solid .site-nav__link { color: var(--color-text); }
.site-nav__link:hover,
.site-nav__link[aria-current="page"] { color: var(--color-brand-green); }
.site-header.is-scrolled .site-nav__link:hover,
.site-header.is-scrolled .site-nav__link[aria-current="page"],
.site-header.is-solid .site-nav__link:hover,
.site-header.is-solid .site-nav__link[aria-current="page"] { color: var(--color-brand-green); }

/* Dropdown */
.has-dropdown { position: relative; }
.has-dropdown__trigger { background: none; border: 0; cursor: pointer; }
.has-dropdown__menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 280px;
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: var(--space-3);
  margin: 0;
  list-style: none;
  display: none;
  z-index: 110;
}
/* Invisible hover bridge: covers the 8px gap between the trigger and the
   dropdown so the cursor can move down without losing :hover. Without
   this the dropdown closes mid-traverse and is unselectable. */
.has-dropdown__menu::before {
  content: "";
  position: absolute;
  top: -8px;
  left: 0;
  right: 0;
  height: 8px;
}
.has-dropdown:hover .has-dropdown__menu,
.has-dropdown:focus-within .has-dropdown__menu { display: block; }
.has-dropdown__menu a {
  display: block;
  padding: var(--space-2) var(--space-3);
  color: var(--color-text);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
}
.has-dropdown__menu a:hover { background: var(--color-bg-alt); color: var(--color-brand-green); }

/* Mobile nav */
.nav-toggle {
  display: none;
  background: none;
  border: 0;
  width: 44px;
  height: 44px;
  cursor: pointer;
  color: inherit;
}
.nav-toggle__bar {
  display: block;
  width: 24px;
  height: 2px;
  background: currentColor;
  margin: 5px auto;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}
@media (max-width: 900px) {
  .nav-toggle { display: block; color: #fff; }
  .site-header.is-scrolled .nav-toggle,
  .site-header.is-solid .nav-toggle { color: var(--color-text); }
  .site-nav {
    position: fixed;
    inset: var(--header-h) 0 0 0;
    background: var(--color-bg-dark);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-5);
    transform: translateX(100%);
    transition: transform var(--transition-base);
    overflow-y: auto;
  }
  .site-nav[data-open="true"] { transform: translateX(0); }
  .site-nav__list { flex-direction: column; align-items: flex-start; gap: var(--space-3); width: 100%; }
  .site-nav__link { color: #fff; font-size: 1.25rem; }
  .site-header.is-scrolled .site-nav__link,
  .site-header.is-solid .site-nav__link { color: #fff; }
  .has-dropdown__menu { position: static; box-shadow: none; background: transparent; padding-left: var(--space-3); display: block; }
  .has-dropdown__menu a { color: var(--color-text-on-dark-muted); }
}

/* ---- Hero ---- */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  color: #fff;
  background: var(--color-bg-dark);
  isolation: isolate;
}
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  overflow: hidden;
}
.hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 60%;
  /* Ken Burns slow zoom — alternating loop so the motion stays perceptible
     even after the first pass and on long-scroll dwell. */
  animation: hero-zoom 22s ease-in-out infinite alternate;
}
@keyframes hero-zoom {
  from { transform: scale(1); }
  to   { transform: scale(1.10); }
}
@media (prefers-reduced-motion: reduce) {
  .hero__bg img { animation: none; }
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  /* Lighter overlay — was 0.5→0.85, now 0.25→0.7. Vignette adds focus on left content. */
  background:
    linear-gradient(180deg, rgba(26,26,28,0.25) 0%, rgba(26,26,28,0.7) 100%),
    linear-gradient(90deg, rgba(26,26,28,0.45) 0%, rgba(26,26,28,0) 60%);
  z-index: -1;
}
.hero__inner {
  max-width: var(--container-max);
  margin-inline: auto;
  padding: calc(var(--header-h) + var(--space-7)) var(--space-4) var(--space-7);
  width: 100%;
}
.hero__title {
  max-width: 18ch;
  text-transform: none;
  letter-spacing: -0.01em;
  font-weight: 800;
  line-height: 1.05;
}
.hero__title em {
  font-style: normal;
  letter-spacing: -0.02em;
  background: linear-gradient(120deg, var(--color-brand-light-green) 0%, var(--color-brand-green) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero__sub { max-width: 60ch; font-size: 1.125rem; color: var(--color-text-on-dark-muted); margin-bottom: var(--space-5); }
.hero__ctas { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-bottom: var(--space-5); }
.hero__trust {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-size: var(--fs-small);
  color: var(--color-text-on-dark-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.hero__trust span { display: inline-flex; align-items: center; gap: var(--space-2); }
.hero__trust span::before {
  content: "";
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--color-brand-light-green);
}

/* ---- Cards ---- */
.card {
  background: #fff;
  border-radius: var(--radius-md);
  padding: var(--space-4);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  border: 1px solid var(--color-border);
}
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.card__icon {
  width: 48px; height: 48px;
  background: var(--gradient-brand);
  border-radius: var(--radius-sm);
  display: grid; place-items: center;
  color: #fff;
  font-weight: 700;
}
.card__title { margin: 0; font-size: 1.25rem; }
.card__desc { color: var(--color-text-muted); margin: 0; }
.card__cta { margin-top: auto; }

.card--media { padding: 0; overflow: hidden; }
.card--media .card__media { aspect-ratio: 3/2; overflow: hidden; }
.card--media .card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--transition-base); }
.card--media:hover .card__media img { transform: scale(1.04); }
.card--media .card__body { padding: var(--space-4); display: flex; flex-direction: column; gap: var(--space-2); }
.card--media .card__meta { font-size: var(--fs-small); color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.08em; }

/* ---- Logo strip (marquee) ---- */
.logo-strip {
  overflow: hidden;
  padding-block: var(--space-5);
  background: var(--color-bg-alt);
}
.logo-strip__heading {
  text-align: center;
  font-size: var(--fs-small);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}
.logo-strip__track {
  display: flex;
  gap: var(--space-6);
  animation: scroll-x 40s linear infinite;
  width: max-content;
}
.logo-strip:hover .logo-strip__track { animation-play-state: paused; }
.logo-strip__item {
  flex: 0 0 auto;
  height: 72px;
  min-width: 120px;
  display: grid;
  place-items: center;
  filter: grayscale(100%);
  opacity: 0.65;
  transition: filter var(--transition-base), opacity var(--transition-base);
}
.logo-strip__item:hover { filter: none; opacity: 1; }
/* Uniform logo height across both banners (clients + accreditations);
   width scales freely so mixed-aspect logos line up on a common baseline. */
.logo-strip__item img,
.logo-strip__item svg { height: 52px; max-height: 52px; max-width: none; width: auto; object-fit: contain; }
@keyframes scroll-x {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}
@media (prefers-reduced-motion: reduce) {
  .logo-strip__track { animation: none; flex-wrap: wrap; justify-content: center; width: 100%; }
}

/* ---- Site footer ---- */
.site-footer {
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark-muted);
  padding-block: var(--space-7) var(--space-4);
  font-size: var(--fs-small);
}
.site-footer a { color: var(--color-text-on-dark); }
.site-footer a:hover { color: var(--color-brand-light-green); }
.site-footer__cols {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: var(--space-5);
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--color-bg-dark-alt);
}
@media (max-width: 900px) {
  .site-footer__cols { grid-template-columns: 1fr; }
}
.site-footer__heading {
  color: #fff;
  font-size: var(--fs-small);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin: 0 0 var(--space-3);
}
.site-footer__list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: var(--space-2); }
.site-footer__bottom {
  padding-top: var(--space-4);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
}
.site-footer__badges { display: flex; gap: var(--space-3); flex-wrap: wrap; margin-top: var(--space-3); }
.site-footer__badge {
  display: inline-block;
  padding: var(--space-1) var(--space-2);
  border: 1px solid var(--color-bg-dark-alt);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

/* ---- Forms ---- */
.form { display: flex; flex-direction: column; gap: var(--space-3); }
.form__row { display: flex; flex-direction: column; gap: var(--space-1); }
.form label { font-size: var(--fs-small); font-weight: 600; }
.form input,
.form select,
.form textarea {
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: #fff;
  font-size: var(--fs-body);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.form input:focus,
.form select:focus,
.form textarea:focus {
  outline: none;
  border-color: var(--color-brand-green);
  box-shadow: 0 0 0 3px rgba(57,169,53,0.15);
}
.form textarea { min-height: 140px; resize: vertical; }
.form .honeypot { position: absolute; left: -9999px; }

/* ---- FAQ ---- */
.faq { display: flex; flex-direction: column; gap: var(--space-2); }
.faq__item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: #fff;
}
.faq__item summary {
  cursor: pointer;
  padding: var(--space-3) var(--space-4);
  font-weight: 700;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
}
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary::after {
  content: "+";
  font-size: 1.5rem;
  color: var(--color-brand-green);
  transition: transform var(--transition-base);
}
.faq__item[open] summary::after { content: "\2013"; }
.faq__item__body {
  padding: 0 var(--space-4) var(--space-4);
  color: var(--color-text-muted);
}

/* ---- Project & service detail ---- */
.detail-hero {
  position: relative;
  min-height: 60vh;
  display: flex;
  align-items: flex-end;
  color: #fff;
  background: var(--color-bg-dark);
  isolation: isolate;
}
.detail-hero__bg { position: absolute; inset: 0; z-index: -2; }
.detail-hero__bg img { width: 100%; height: 100%; object-fit: cover; }
.detail-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(26,26,28,0.4) 0%, rgba(26,26,28,0.85) 100%);
  z-index: -1;
}
.detail-hero__inner {
  max-width: var(--container-max);
  margin-inline: auto;
  width: 100%;
  padding: calc(var(--header-h) + var(--space-6)) var(--space-4) var(--space-6);
}
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  font-size: var(--fs-small);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-on-dark-muted);
  margin-bottom: var(--space-3);
}
.breadcrumbs a { color: var(--color-text-on-dark-muted); }
.breadcrumbs a:hover { color: #fff; }
.breadcrumbs li { list-style: none; }
.breadcrumbs ol { display: contents; padding: 0; margin: 0; }
.breadcrumbs li + li::before { content: " / "; margin-right: var(--space-2); }

/* ---- Article (Knowledge) ---- */
.article-body {
  max-width: var(--container-narrow);
  margin-inline: auto;
}
.article-body h2 { margin-top: var(--space-6); }
.article-body h3 { margin-top: var(--space-5); }
.article-body p, .article-body ul, .article-body ol { font-size: 1.0625rem; }
.article-body table { width: 100%; border-collapse: collapse; margin-block: var(--space-4); }
.article-body th, .article-body td { border-bottom: 1px solid var(--color-border); padding: var(--space-2) var(--space-3); text-align: left; }
.article-body th { background: var(--color-bg-alt); font-weight: 700; }
.article-body figure { margin-block: var(--space-5); }
.article-body figcaption { font-size: var(--fs-small); color: var(--color-text-muted); margin-top: var(--space-2); }
.article-meta { display: flex; gap: var(--space-3); flex-wrap: wrap; font-size: var(--fs-small); color: var(--color-text-muted); margin-bottom: var(--space-5); }
.article-toc {
  background: var(--color-bg-alt);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-5);
}
.article-toc ol { padding-left: var(--space-4); margin: 0; }

/* ---- Team ---- */
.team-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5); }
.team-grid--two {
  grid-template-columns: repeat(2, 1fr);
  max-width: 760px;
  margin-inline: auto;
}
@media (max-width: 900px) {
  .team-grid,
  .team-grid--two { grid-template-columns: 1fr; max-width: none; }
}
.team-member { display: flex; flex-direction: column; gap: var(--space-2); }
.team-member__photo {
  aspect-ratio: 1/1;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-bg-alt);
}
.team-member__photo img { width: 100%; height: 100%; object-fit: cover; }
.team-member__name { font-size: 1.125rem; margin: 0; text-transform: none; letter-spacing: 0; }
.team-member__role { color: var(--color-brand-green); font-size: var(--fs-small); font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; }

/* ---- Lightbox (project galleries) ---- */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.9);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: var(--space-4);
}
.lightbox[data-open="true"] { display: flex; }
.lightbox__img { max-width: 100%; max-height: 100%; box-shadow: var(--shadow-lg); }
.lightbox__close {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  background: rgba(255,255,255,0.1);
  color: #fff;
  border: 0;
  width: 44px; height: 44px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.5rem;
}
.lightbox__close:hover { background: rgba(255,255,255,0.25); }

/* ---- Reveal-on-scroll ---- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---- Utilities ---- */
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.lead { font-size: 1.125rem; color: var(--color-text-muted); max-width: 60ch; }
.section--dark .lead { color: var(--color-text-on-dark-muted); }
.mt-4 { margin-top: var(--space-4); }
.mt-5 { margin-top: var(--space-5); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-5 { margin-bottom: var(--space-5); }
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}

/* ---- Sticky bottom CTA (long pages) ---- */
.sticky-cta {
  position: fixed;
  right: var(--space-4);
  bottom: var(--space-4);
  z-index: 90;
  background: var(--color-brand-green);
  color: #fff;
  padding: var(--space-3) var(--space-4);
  border-radius: 999px;
  font-weight: 700;
  font-size: var(--fs-small);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-decoration: none;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  transition: opacity 250ms ease, transform 250ms ease, background 150ms ease;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}
.sticky-cta.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.sticky-cta:hover { background: var(--color-brand-light-green); color: #fff; }
.sticky-cta::after { content: " \2192"; }
@media (max-width: 600px) {
  .sticky-cta { right: var(--space-3); bottom: var(--space-3); padding: var(--space-2) var(--space-3); font-size: 0.8rem; }
}

/* ---- Capability chips (replaces re-coloured badges) ---- */
.capability-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-3);
}
.capability-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: var(--fs-small);
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}
.capability-chip:hover {
  background: var(--color-brand-green);
  border-color: var(--color-brand-green);
  color: #fff;
}
.capability-chip__meta {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  font-weight: 400;
}
.capability-chip:hover .capability-chip__meta { color: rgba(255,255,255,0.85); }

/* ---- Filter chips (projects index) ---- */
.filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}
.filter-chip {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  height: 36px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: var(--fs-small);
  font-weight: 500;
  color: var(--color-text);
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
  letter-spacing: 0;
  text-transform: none;
}
.filter-chip:hover { border-color: var(--color-brand-green); color: var(--color-brand-green); }
.filter-chip[aria-pressed="true"] {
  background: var(--color-brand-green);
  border-color: var(--color-brand-green);
  color: #fff;
}
.filter-chip:focus-visible { outline: 3px solid var(--color-brand-light-green); outline-offset: 2px; }

/* ---- Featured project card (asymmetric grid) ---- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}
.projects-grid .card--featured {
  grid-column: span 3;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  padding: 0;
}
.projects-grid .card--featured .card__media { aspect-ratio: auto; height: 100%; min-height: 320px; }
.projects-grid .card--featured .card__body { padding: var(--space-5); display: flex; flex-direction: column; justify-content: center; gap: var(--space-3); }
.projects-grid .card--featured .card__title { font-size: 1.75rem; }
.projects-grid .card--featured .card__featured-tag {
  display: inline-block;
  padding: var(--space-1) var(--space-2);
  background: var(--color-brand-green);
  color: #fff;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border-radius: var(--radius-sm);
  font-weight: 700;
  width: fit-content;
}
@media (max-width: 900px) {
  .projects-grid { grid-template-columns: 1fr; }
  .projects-grid .card--featured { grid-column: span 1; grid-template-columns: 1fr; }
}

/* ---- Marquee pause control ---- */
.logo-strip { position: relative; }
.logo-strip__pause {
  position: absolute;
  right: var(--space-3);
  top: var(--space-3);
  width: 36px; height: 36px;
  background: rgba(255,255,255,0.9);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  cursor: pointer;
  display: grid;
  place-items: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  z-index: 5;
  transition: background var(--transition-fast), color var(--transition-fast);
}
.logo-strip__pause:hover { background: var(--color-bg-dark); color: #fff; }
.logo-strip__pause:focus-visible { outline: 2px solid var(--color-brand-green); outline-offset: 2px; }
.logo-strip[data-paused="true"] .logo-strip__track { animation-play-state: paused; }

/* ---- Form fieldset / section grouping ---- */
.form fieldset {
  border: 0;
  padding: 0;
  margin: 0 0 var(--space-5);
}
.form fieldset legend {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-brand-green);
  margin-bottom: var(--space-3);
  padding: 0;
}
.form input:focus,
.form textarea:focus,
.form select:focus {
  border-color: var(--color-brand-green);
  outline: 2px solid rgba(57,169,53,0.18);
  outline-offset: 0;
  box-shadow: none;
}
.form button[type="submit"][aria-busy="true"] {
  opacity: 0.7;
  cursor: progress;
  pointer-events: none;
}
.form button[type="submit"][aria-busy="true"]::after {
  content: "";
  display: inline-block;
  width: 14px; height: 14px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  margin-left: var(--space-2);
  animation: spin 0.8s linear infinite;
  vertical-align: middle;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---- Team member: initials placeholder ---- */
.team-member__photo--initials {
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #2A2A2D 0%, #1A1A1C 100%);
  color: var(--color-brand-light-green);
  font-weight: 700;
  font-size: 5rem;
  letter-spacing: 0.05em;
}

/* ---- Trust strip below hero ---- */
.trust-band {
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark-muted);
  padding-block: var(--space-4);
  border-bottom: 1px solid var(--color-bg-dark-alt);
}
.trust-band__inner {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-4);
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4) var(--space-5);
  font-size: var(--fs-small);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.trust-band__item { display: inline-flex; align-items: center; gap: var(--space-2); }
.trust-band__item::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--color-brand-light-green);
}

/* ---- Inline icons (e.g. LinkedIn) ---- */
.icon {
  display: inline-block;
  width: 1.1em;
  height: 1.1em;
  vertical-align: -0.18em;
  margin-right: 0.4em;
  fill: currentColor;
}

/* ---- Generic link colour: use the AA-compliant brand-green-text token ---- */
a { color: var(--color-brand-green-text); }
a:hover { color: var(--color-brand-green); }
.section-eyebrow { color: var(--color-brand-green-text); }

/* ---- Form: invalid field feedback (A3) ----
   Triggered by JS in main.js setting aria-invalid="true" on bad inputs. */
.form input[aria-invalid="true"],
.form textarea[aria-invalid="true"],
.form select[aria-invalid="true"] {
  border-color: var(--color-danger);
  background: rgba(192,57,43,0.04);
}
.form .form__error {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--fs-small);
  color: var(--color-danger);
}

/* ---- Specialist band (Chemical Solutions on /services) (F7) ---- */
.specialist-band {
  background: linear-gradient(135deg, #1A1A1C 0%, #2A2A2D 100%);
  color: #fff;
  padding-block: var(--space-7);
  position: relative;
  overflow: hidden;
}
.specialist-band__inner {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-4);
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: var(--space-6);
  align-items: center;
}
.specialist-band__copy h2 { color: #fff; max-width: 22ch; }
.specialist-band__visual {
  display: grid;
  place-items: center;
}
.specialist-band__visual svg {
  width: 100%;
  max-width: 320px;
  height: auto;
}
@media (max-width: 900px) {
  .specialist-band__inner { grid-template-columns: 1fr; gap: var(--space-5); }
  .specialist-band__visual { order: -1; max-width: 220px; margin-inline: auto; }
}

/* ---- Callout card on service detail pages (F9) ---- */
.callout-card {
  margin-block: var(--space-5);
  padding: var(--space-5);
  background: var(--color-bg-alt);
  border-left: 4px solid var(--color-brand-green);
  border-radius: var(--radius-md);
}
.callout-card__eyebrow {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-brand-green-text);
  margin: 0 0 var(--space-3);
}
.callout-card__list {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-3);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2) var(--space-4);
}
@media (max-width: 700px) {
  .callout-card__list { grid-template-columns: 1fr; }
}
.callout-card__list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  font-size: var(--fs-body);
  line-height: 1.45;
}
.callout-card__icon {
  display: inline-flex;
  flex: 0 0 32px;
  width: 32px;
  height: 32px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(57,169,53,0.12);
  color: var(--color-brand-green);
}
.callout-card__footer {
  margin: 0;
  font-size: var(--fs-small);
  color: var(--color-text-muted);
}

/* ---- Article TOC + meta polish (F14, F16) ---- */
.article-toc {
  border-left: 3px solid var(--color-brand-green);
  padding-block: var(--space-4);
  padding-inline: var(--space-5);
}
.article-toc strong {
  display: block;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-brand-green-text);
  margin-bottom: var(--space-2);
}
.article-toc ol li { padding-block: 0.15rem; }
.article-toc a { color: var(--color-text); }
.article-toc a:hover { color: var(--color-brand-green-text); }

.article-meta {
  align-items: center;
  gap: var(--space-2) var(--space-4);
}
.article-meta > span:nth-child(4) {
  /* Reading time pill (the 4th child in published / reviewed / author / time order) */
  background: var(--color-brand-green);
  color: #fff;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.7rem;
}
.article-meta > span:nth-child(4) strong { font-weight: 700; }

/* ---- Reading-progress bar (F15) ---- */
.reading-progress {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  height: 3px;
  background: transparent;
  z-index: 200;
  pointer-events: none;
}
.reading-progress__bar {
  height: 100%;
  width: 0;
  background: var(--color-brand-green);
  transform-origin: left center;
  transition: width 0.05s linear;
}
@media (prefers-reduced-motion: reduce) {
  .reading-progress__bar { transition: none; }
}

/* ---- Footer logo: panel treatment so the colour logo stays branded
        on the dark footer instead of being inverted to a flat white blob (F22). ---- */
.site-footer__logo-panel {
  display: inline-block;
  background: #fff;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-3);
}
.site-footer__logo-panel img {
  display: block;
  width: 160px;
  height: auto;
}

/* ---- Mobile: hide secondary CTA in the header to avoid logo collision (F29) ---- */
@media (max-width: 600px) {
  .site-nav__list .btn--primary { display: none; }
}

/* ---- Mobile body font bump 16 → 17px (F30) ---- */
@media (max-width: 600px) {
  body { font-size: 1.0625rem; }
}

/* ---- View Transitions API (F27) ---- */
@view-transition { navigation: auto; }
::view-transition-old(root),
::view-transition-new(root) { animation-duration: 220ms; }
@media (prefers-reduced-motion: reduce) {
  ::view-transition-old(root),
  ::view-transition-new(root) { animation: none; }
}

/* ---- Print ---- */
@media print {
  .site-header, .site-footer, .nav-toggle, .hero__ctas, .sticky-cta { display: none !important; }
  body { color: #000; background: #fff; }
  a { color: #000; text-decoration: underline; }
}