/* =========================================================
   3C Environmental Solutions — Design System
   Single shared stylesheet for the whole site.
   ========================================================= */

/* ---------- Tokens ---------- */
:root {
  /* Brand */
  --green-primary: #15803d;     /* forest green */
  --green-deep:    #0f4d26;     /* dark forest, hover */
  --green-accent:  #10b981;     /* emerald, action */
  --green-soft:    #ecfdf5;     /* light tint background */

  /* Ink */
  --ink:           #0f172a;     /* near-black headings */
  --ink-strong:    #020617;
  --ink-muted:     #475569;     /* body text */
  --ink-soft:      #94a3b8;     /* meta text */

  /* Surfaces */
  --bg:            #ffffff;
  --bg-soft:       #f8fafc;
  --bg-dark:       #0a1f14;     /* dark sections */
  --border:        #e2e8f0;
  --border-strong: #cbd5e1;

  /* Effects */
  --shadow-sm: 0 1px 2px rgba(15,23,42,.06);
  --shadow-md: 0 4px 14px rgba(15,23,42,.08);
  --shadow-lg: 0 10px 40px rgba(15,23,42,.12);

  /* Radii */
  --radius-sm: 6px;
  --radius:    10px;
  --radius-lg: 18px;

  /* Layout */
  --container: 1200px;
  --gutter: 24px;

  /* Type */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink-muted);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; height: auto; }
a { color: var(--green-primary); text-decoration: none; }
a:hover { color: var(--green-deep); }
button { font-family: inherit; cursor: pointer; }

h1, h2, h3, h4 { color: var(--ink); line-height: 1.2; margin: 0 0 .5em; font-weight: 700; letter-spacing: -0.01em; }
h1 { font-size: clamp(2rem, 4.4vw, 3.4rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.4rem); }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.05rem; }
p  { margin: 0 0 1em; }

/* ---------- Layout ---------- */
.container { max-width: var(--container); margin: 0 auto; padding: 0 var(--gutter); }
.section   { padding: clamp(56px, 8vw, 96px) 0; }
.section--soft { background: var(--bg-soft); }
.section--dark { background: var(--bg-dark); color: #cbd5e1; }
.section--dark h1, .section--dark h2, .section--dark h3 { color: #fff; }

.eyebrow {
  display: inline-block;
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--green-primary);
  margin-bottom: 12px;
}
.section--dark .eyebrow { color: var(--green-accent); }

.section-head { max-width: 760px; margin: 0 auto 48px; text-align: center; }
.section-head--left { text-align: left; margin-left: 0; }

.lead { font-size: 1.15rem; color: var(--ink-muted); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  font-size: .98rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: all .18s ease;
  text-decoration: none;
  white-space: nowrap;
}
.btn--primary { background: var(--green-primary); color: #fff; }
.btn--primary:hover { background: var(--green-deep); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--border-strong); }
.btn--ghost:hover { background: var(--ink); color: #fff; border-color: var(--ink); }
.btn--ghost-light { background: transparent; color: #fff; border-color: rgba(255,255,255,.4); }
.btn--ghost-light:hover { background: #fff; color: var(--ink); }
.btn--lg { padding: 16px 28px; font-size: 1.02rem; }
.btn--block { width: 100%; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 80px;
  padding: 8px 0;
}
.nav__brand {
  display: inline-flex; align-items: center;
  text-decoration: none;
}
.nav__brand-img {
  height: 56px; width: auto; display: block;
}

/* Footer logo — needs a light background so the dark logo is visible on dark footer */
.footer__logo {
  display: inline-block;
  background: #fff;
  padding: 10px 14px;
  border-radius: 10px;
  margin-bottom: 16px;
  line-height: 0;
}
.footer__logo img { height: 48px; width: auto; display: block; }

.nav__list {
  list-style: none; margin: 0; padding: 0;
  display: flex; align-items: center; gap: 4px;
}
.nav__link {
  display: inline-block;
  padding: 10px 14px;
  color: var(--ink);
  font-weight: 500;
  font-size: .96rem;
  border-radius: 8px;
}
.nav__link:hover { background: var(--bg-soft); color: var(--ink); }
.nav__link.is-active { color: var(--green-primary); }

.nav__cta { margin-left: 8px; }

/* Dropdown */
.nav__item { position: relative; }
.nav__menu {
  position: absolute; top: calc(100% + 6px); left: 0;
  min-width: 280px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 10px;
  list-style: none; margin: 0;
  opacity: 0; visibility: hidden; transform: translateY(-4px);
  transition: opacity .15s ease, transform .15s ease, visibility .15s ease;
}
.nav__item:hover .nav__menu,
.nav__item:focus-within .nav__menu {
  opacity: 1; visibility: visible; transform: translateY(0);
}
.nav__menu a {
  display: block; padding: 10px 12px; border-radius: 6px;
  color: var(--ink); font-weight: 500; font-size: .93rem;
}
.nav__menu a:hover { background: var(--bg-soft); }
.nav__caret { width: 12px; height: 12px; opacity: .6; }

/* Mobile nav button */
.nav__toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  width: 44px; height: 44px;
  align-items: center; justify-content: center;
}
.nav__toggle span {
  width: 20px; height: 2px; background: var(--ink); position: relative;
}
.nav__toggle span::before, .nav__toggle span::after {
  content: ""; position: absolute; left: 0; width: 20px; height: 2px; background: var(--ink);
}
.nav__toggle span::before { top: -6px; }
.nav__toggle span::after  { top:  6px; }

/* ---------- Top utility bar ---------- */
.utilbar {
  background: var(--ink-strong); color: #cbd5e1;
  font-size: .82rem;
}
.utilbar__row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 8px 0;
  gap: 12px;
}
.utilbar a { color: #cbd5e1; }
.utilbar a:hover { color: #fff; }
.utilbar__certs { display: flex; gap: 14px; flex-wrap: wrap; }
.utilbar__certs span { opacity: .9; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 620px;
  display: flex; align-items: center;
  color: #fff;
  isolation: isolate;
  overflow: hidden;
}
.hero__bg {
  position: absolute; inset: 0; z-index: -2;
  background-size: cover; background-position: center;
}
.hero__bg::after {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(110deg, rgba(10,31,20,.92) 0%, rgba(10,31,20,.78) 45%, rgba(10,31,20,.35) 100%);
}
.hero__inner {
  padding: 96px 0;
  max-width: 720px;
}
.hero h1 { color: #fff; margin-bottom: 18px; }
.hero p  { color: #cbd5e1; font-size: 1.18rem; margin-bottom: 32px; max-width: 620px; }
.hero__cta { display: flex; gap: 14px; flex-wrap: wrap; }
.hero__badges {
  display: flex; flex-wrap: wrap; gap: 16px 24px;
  margin-top: 42px;
  font-size: .85rem; color: #94a3b8;
  letter-spacing: .04em; text-transform: uppercase; font-weight: 600;
}
.hero__badges span { display: inline-flex; align-items: center; gap: 8px; }
.hero__badges span::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: var(--green-accent);
}

/* ---------- Service cards ---------- */
.cards { display: grid; gap: 24px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex; flex-direction: column;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--border-strong); }
.card__media { aspect-ratio: 16 / 10; background: #e2e8f0 center/cover no-repeat; }
.card__body  { padding: 22px; display: flex; flex-direction: column; flex: 1; }
.card__title { font-size: 1.15rem; margin-bottom: 8px; }
.card__desc  { color: var(--ink-muted); font-size: .96rem; flex: 1; }
.card__cta {
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: 14px;
  font-weight: 600; font-size: .92rem; color: var(--green-primary);
}
.card__cta::after { content: "→"; transition: transform .15s ease; }
.card:hover .card__cta::after { transform: translateX(3px); }

/* ---------- Case study cards ---------- */
.case {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex; flex-direction: column;
}
.case__media { aspect-ratio: 16 / 9; background: #1a2332 center/cover no-repeat; }
.case__body  { padding: 26px; display: flex; flex-direction: column; flex: 1; }
.case__sector {
  display: inline-block;
  font-size: .76rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
  color: var(--green-primary);
  background: var(--green-soft);
  padding: 4px 10px; border-radius: 999px;
  margin-bottom: 14px; align-self: flex-start;
}
.case__title { font-size: 1.15rem; margin-bottom: 10px; }
.case__desc { font-size: .95rem; color: var(--ink-muted); flex: 1; }
.case__metrics {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px;
  margin-top: 18px; padding-top: 18px; border-top: 1px solid var(--border);
}
.case__metric strong {
  display: block; color: var(--ink); font-size: 1.1rem; line-height: 1.2;
  font-variant-numeric: tabular-nums;
}
.case__metric span { font-size: .76rem; color: var(--ink-soft); }

/* ---------- Impact / counter ---------- */
.impact {
  background: var(--bg-dark);
  color: #cbd5e1;
  position: relative;
  isolation: isolate;
}
.impact h1, .impact h2, .impact h3 { color: #fff; }
.impact::before {
  content: "";
  position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(900px 400px at 10% 10%, rgba(16,185,129,.18), transparent 60%),
    radial-gradient(700px 400px at 90% 90%, rgba(21,128,61,.18), transparent 60%);
}
.impact__grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
  margin-top: 36px;
}
.impact__stat {
  text-align: center;
  padding: 28px 18px;
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
}
.impact__num {
  font-size: clamp(2.2rem, 4.6vw, 3.4rem);
  font-weight: 800;
  color: #fff;
  line-height: 1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}
.impact__suffix { color: var(--green-accent); margin-left: 4px; }
.impact__label {
  margin-top: 10px;
  font-size: .82rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: #94a3b8;
}

/* ---------- Quote form ---------- */
.quote {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-md);
}
.quote h3 { margin-bottom: 6px; }
.quote__sub { color: var(--ink-muted); font-size: .95rem; margin-bottom: 22px; }
.form-row { display: grid; gap: 14px; grid-template-columns: 1fr 1fr; margin-bottom: 14px; }
.form-row--full { grid-template-columns: 1fr; }
.field label {
  display: block; font-size: .82rem; font-weight: 600; color: var(--ink);
  margin-bottom: 6px;
}
.field label .req { color: #b91c1c; }
.field input, .field select, .field textarea {
  width: 100%;
  padding: 12px 14px;
  font: inherit; font-size: .96rem; color: var(--ink);
  background: #fff;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--green-primary);
  box-shadow: 0 0 0 3px rgba(21,128,61,.15);
}
.field textarea { resize: vertical; min-height: 110px; }
.field--hp { position: absolute; left: -9999px; }
.quote__actions { margin-top: 18px; display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.quote__note { font-size: .82rem; color: var(--ink-soft); }
.form-status {
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: 8px;
  font-size: .92rem;
  display: none;
}
.form-status.is-success { display: block; background: var(--green-soft); color: var(--green-deep); border: 1px solid #a7f3d0; }
.form-status.is-error   { display: block; background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }

/* Two-column hero/quote layout */
.split {
  display: grid; gap: 40px;
  grid-template-columns: 1.05fr .95fr;
  align-items: stretch;
}

/* ---------- Process / steps ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
.step {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
}
.step::before {
  counter-increment: step; content: counter(step, decimal-leading-zero);
  display: block;
  font-size: .78rem; font-weight: 700; letter-spacing: .14em;
  color: var(--green-primary); margin-bottom: 10px;
}
.step h4 { margin-bottom: 6px; }
.step p { font-size: .92rem; margin: 0; }

/* ---------- Logos / certs strip ---------- */
.certs-strip {
  display: flex; flex-wrap: wrap; gap: 16px 28px;
  align-items: center; justify-content: center;
  padding: 24px 0;
}
.certs-strip__item {
  font-weight: 700; color: var(--ink);
  font-size: .92rem; letter-spacing: .04em;
  padding: 10px 18px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #fff;
}

/* ---------- Footer ---------- */
.footer {
  background: var(--ink-strong); color: #cbd5e1;
  padding: 64px 0 28px;
  margin-top: 0;
}
.footer__grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px;
}
.footer h4 { color: #fff; font-size: .85rem; text-transform: uppercase; letter-spacing: .12em; margin-bottom: 14px; }
.footer ul { list-style: none; margin: 0; padding: 0; }
.footer li { margin-bottom: 10px; }
.footer a { color: #94a3b8; font-size: .94rem; }
.footer a:hover { color: #fff; }
.footer__brand p { font-size: .92rem; color: #94a3b8; margin-bottom: 12px; }
.footer__bottom {
  margin-top: 48px; padding-top: 22px;
  border-top: 1px solid #1e293b;
  display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap;
  font-size: .82rem; color: #64748b;
}

/* ---------- Sticky mobile CTA ---------- */
.mobile-cta { display: none; }

/* ---------- Inner page hero ---------- */
.page-hero {
  background:
    linear-gradient(180deg, rgba(10,31,20,.85), rgba(10,31,20,.75)),
    var(--bg-dark) center/cover no-repeat;
  color: #fff;
  padding: 80px 0 64px;
}
.page-hero h1 { color: #fff; max-width: 800px; }
.page-hero p { color: #cbd5e1; max-width: 720px; font-size: 1.1rem; }
.page-hero .eyebrow { color: var(--green-accent); }

/* ---------- Featured / banner CTA ---------- */
.banner-cta {
  background: linear-gradient(135deg, var(--green-primary), var(--green-deep));
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 36px 40px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  flex-wrap: wrap;
}
.banner-cta h3 { color: #fff; margin: 0 0 4px; }
.banner-cta p { color: rgba(255,255,255,.85); margin: 0; }

/* ---------- Two-col content ---------- */
.two-col {
  display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center;
}
.two-col img { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); }

/* ---------- Value props (4-col with icon) ---------- */
.values { display: grid; gap: 24px; grid-template-columns: repeat(4, 1fr); }
.value {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: transform .18s ease, box-shadow .18s ease;
}
.value:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.value__icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: var(--green-soft);
  color: var(--green-primary);
  display: grid; place-items: center;
  margin-bottom: 18px;
}
.value__icon svg { width: 24px; height: 24px; stroke: currentColor; }
.value h3 { font-size: 1.08rem; margin-bottom: 8px; }
.value p { font-size: .94rem; margin: 0; }

/* ---------- Industries served grid ---------- */
.industries {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
  margin-top: 36px;
}
.industry {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 18px;
  text-align: center;
  transition: border-color .18s ease, transform .18s ease;
}
.industry:hover { border-color: var(--green-primary); transform: translateY(-2px); }
.industry__icon {
  width: 40px; height: 40px; margin: 0 auto 10px;
  color: var(--green-primary);
}
.industry__name { font-weight: 600; color: var(--ink); font-size: .92rem; }

/* ---------- Hero stats bar (below hero) ---------- */
.hero-stats {
  background: #fff;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.hero-stats__grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  text-align: center;
  padding: 28px 0;
}
.hero-stats__cell {
  padding: 8px 12px;
  border-right: 1px solid var(--border);
}
.hero-stats__cell:last-child { border-right: none; }
.hero-stats__num {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 800; color: var(--ink); line-height: 1;
  font-variant-numeric: tabular-nums;
}
.hero-stats__num span { color: var(--green-primary); }
.hero-stats__label {
  font-size: .76rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink-soft); font-weight: 600; margin-top: 6px;
}

@media (max-width: 960px) {
  .values { grid-template-columns: repeat(2, 1fr); }
  .industries { grid-template-columns: repeat(3, 1fr); }
  .hero-stats__grid { grid-template-columns: repeat(2, 1fr); gap: 24px 0; }
  .hero-stats__cell:nth-child(2) { border-right: none; }
  .hero-stats__cell:nth-child(1), .hero-stats__cell:nth-child(2) {
    border-bottom: 1px solid var(--border); padding-bottom: 24px;
  }
  .hero-stats__cell:nth-child(3), .hero-stats__cell:nth-child(4) { padding-top: 24px; }
}
@media (max-width: 480px) {
  .values, .industries { grid-template-columns: 1fr; }
  .hero-stats__grid { grid-template-columns: 1fr; }
  .hero-stats__cell { border-right: none; border-bottom: 1px solid var(--border); padding: 16px; }
  .hero-stats__cell:last-child { border-bottom: none; }
}

/* ---------- Lists with checkmarks ---------- */
.check-list { list-style: none; padding: 0; margin: 0 0 24px; }
.check-list li {
  position: relative; padding-left: 28px; margin-bottom: 10px;
  color: var(--ink-muted);
}
.check-list li::before {
  content: ""; position: absolute; left: 0; top: 8px;
  width: 16px; height: 16px;
  background: var(--green-soft);
  border-radius: 50%;
}
.check-list li::after {
  content: ""; position: absolute; left: 4px; top: 12px;
  width: 8px; height: 4px;
  border-left: 2px solid var(--green-primary);
  border-bottom: 2px solid var(--green-primary);
  transform: rotate(-45deg);
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .impact__grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1.2fr 1fr; }
  .split, .two-col { grid-template-columns: 1fr; }
  /* Hide top utility bar on tablets + phones — contact info lives in nav, footer, and floating CTA */
  .utilbar { display: none !important; }
}

@media (max-width: 760px) {
  .nav__toggle { display: inline-flex; }
  .nav__brand-img { height: 44px; }
  .nav__list {
    position: fixed;
    top: 72px; left: 0; right: 0;
    background: #fff;
    flex-direction: column; align-items: stretch;
    gap: 0;
    padding: 12px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    transform: translateY(-110%);
    transition: transform .25s ease;
    max-height: calc(100vh - 72px);
    overflow-y: auto;
  }
  .nav__list.is-open { transform: translateY(0); }
  .nav__link {
    padding: 14px 16px;
    border-radius: 8px;
    font-size: 1rem;
  }
  .nav__menu {
    position: static;
    opacity: 1; visibility: visible; transform: none;
    box-shadow: none; border: none;
    padding: 0 0 8px 14px;
    background: transparent;
  }
  .nav__menu a { padding: 10px 14px; font-size: .94rem; }
  .nav__cta { margin: 8px 0 0; }
  .nav__cta .btn { width: 100%; }

  .hero { min-height: 540px; }
  .hero__inner { padding: 64px 0; }
  .form-row { grid-template-columns: 1fr; }
  .case__metrics { grid-template-columns: repeat(3, 1fr); }
  .footer__grid { grid-template-columns: 1fr; }

  /* Sticky mobile bottom CTA */
  .mobile-cta {
    display: flex;
    position: fixed; left: 12px; right: 12px; bottom: 12px;
    z-index: 40;
    box-shadow: var(--shadow-lg);
  }
  .mobile-cta .btn { flex: 1; }
  body { padding-bottom: 84px; }
}

@media (max-width: 480px) {
  .impact__grid { grid-template-columns: 1fr; }
  .case__metrics { grid-template-columns: 1fr 1fr; }
  .banner-cta { flex-direction: column; align-items: flex-start; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}