:root {
  --brand-green: #5DAC1B;
  --brand-green-dark: #4A8C13;
  --brand-navy: #1F2A37;
  --brand-navy-light: #374151;
  --bg: #ffffff;
  --bg-soft: #f7faf4;
  --text: #1f2a37;
  --text-muted: #4b5563;
  --border: #e5e7eb;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

a { color: var(--brand-green-dark); text-decoration: none; }
a:hover { text-decoration: underline; }

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

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Top bar */
.topbar {
  background: var(--brand-navy);
  color: #cbd5e1;
  font-size: 0.875rem;
}
.topbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  padding-top: 8px;
  padding-bottom: 8px;
  gap: 12px;
}
.topbar a { color: #ffffff; }
.topbar .topbar-info { display: flex; gap: 18px; flex-wrap: wrap; }

/* Header / nav */
.site-header {
  background: #ffffff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}
.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 14px;
  padding-bottom: 14px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: var(--brand-navy);
}
.brand .brand-mark {
  height: 52px;
  width: auto;
  display: block;
  flex-shrink: 0;
}
.brand .brand-name {
  display: flex;
  flex-direction: column;
  line-height: 1.05;
}
.brand .brand-name span:first-child {
  color: var(--brand-green);
  font-size: 1.05rem;
}
.brand .brand-name span:last-child {
  color: var(--brand-navy);
  font-size: 0.75rem;
  letter-spacing: 2px;
}
@media (max-width: 640px) {
  .brand .brand-mark { height: 42px; }
  .brand .brand-name span:first-child { font-size: 0.95rem; }
  .brand .brand-name span:last-child { font-size: 0.65rem; letter-spacing: 1.5px; }
}

.nav { display: flex; gap: 24px; align-items: center; }
.nav a {
  color: var(--brand-navy);
  font-weight: 600;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
}
.nav a:hover { color: var(--brand-green-dark); text-decoration: none; }
.nav a.active {
  color: var(--brand-green-dark);
  border-bottom-color: var(--brand-green);
}
.nav .btn { padding: 10px 18px; }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
  cursor: pointer;
}
.nav-toggle span {
  display: block; width: 22px; height: 2px;
  background: var(--brand-navy); margin: 4px 0;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 6px;
  font-weight: 600;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
}
.btn-primary {
  background: var(--brand-green);
  color: #ffffff;
}
.btn-primary:hover {
  background: var(--brand-green-dark);
  text-decoration: none;
}
.btn-outline {
  background: transparent;
  color: #ffffff;
  border-color: #ffffff;
}
.btn-outline:hover {
  background: #ffffff;
  color: var(--brand-navy);
  text-decoration: none;
}

/* Hero */
.hero {
  background:
    linear-gradient(135deg, rgba(31,42,55,0.92), rgba(31,42,55,0.78)),
    url("https://images.unsplash.com/photo-1514924013411-cbf25faa35bb?auto=format&fit=crop&w=1600&q=60") center/cover no-repeat;
  color: #fff;
  padding: 90px 0;
}
.hero h1 {
  font-size: clamp(2rem, 4vw, 3.25rem);
  margin: 0 0 18px;
  line-height: 1.15;
}
.hero h1 .accent { color: var(--brand-green); }
.hero p { font-size: 1.15rem; max-width: 720px; margin: 0 0 28px; opacity: 0.95; }
.hero .actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* Page banner (smaller) */
.page-banner {
  background: linear-gradient(135deg, var(--brand-navy), var(--brand-navy-light));
  color: #fff;
  padding: 60px 0;
}
.page-banner h1 { margin: 0 0 8px; font-size: clamp(1.75rem, 3vw, 2.5rem); }
.page-banner p { margin: 0; opacity: 0.85; }

/* Sections */
section { padding: 70px 0; }
section.alt { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 50px; }
.section-head .eyebrow {
  color: var(--brand-green-dark);
  font-weight: 700;
  letter-spacing: 2px;
  font-size: 0.8rem;
  text-transform: uppercase;
}
.section-head h2 {
  font-size: clamp(1.6rem, 2.5vw, 2.25rem);
  margin: 8px 0 12px;
  color: var(--brand-navy);
}
.section-head p { color: var(--text-muted); margin: 0; }

/* Grid */
.grid {
  display: grid;
  gap: 24px;
}
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }

/* Cards */
.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 28px;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(31,42,55,0.08);
  border-color: var(--brand-green);
}
.card .icon {
  width: 52px; height: 52px;
  background: rgba(93,172,27,0.12);
  color: var(--brand-green-dark);
  border-radius: 10px;
  display: grid; place-items: center;
  margin-bottom: 16px;
  font-size: 24px;
}
.card h3 { margin: 0 0 10px; color: var(--brand-navy); font-size: 1.15rem; }
.card p { margin: 0; color: var(--text-muted); }

/* Feature list */
.feature-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.feature-list li {
  display: flex; gap: 12px; align-items: flex-start;
}
.feature-list li::before {
  content: "✓";
  color: #fff;
  background: var(--brand-green);
  width: 22px; height: 22px;
  border-radius: 50%;
  display: grid; place-items: center;
  font-size: 0.8rem;
  flex-shrink: 0;
  margin-top: 3px;
}

/* Two column block */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}
.two-col h2 { color: var(--brand-navy); margin-top: 0; }
.two-col img { border-radius: 10px; }

/* CTA strip */
.cta-strip {
  background: linear-gradient(135deg, var(--brand-green), var(--brand-green-dark));
  color: #fff;
  padding: 60px 0;
  text-align: center;
}
.cta-strip h2 { margin: 0 0 12px; font-size: clamp(1.5rem, 2.5vw, 2rem); }
.cta-strip p { margin: 0 0 24px; opacity: 0.95; }

/* Our Work gallery */
.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.gallery-item {
  margin: 0;
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 6px 20px rgba(31,42,55,0.06);
}
.gallery-item img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.gallery-item:hover img { transform: scale(1.05); }
.gallery-item figcaption {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 28px 16px 14px;
  color: #fff;
  font-weight: 700;
  letter-spacing: 0.4px;
  background: linear-gradient(transparent, rgba(15,22,32,0.82));
}
@media (max-width: 880px) {
  .gallery { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .gallery { grid-template-columns: 1fr; }
}

/* Product figure (e.g. fuel sensor) */
.product-figure {
  margin: 44px auto 0;
  max-width: 460px;
  background: radial-gradient(circle at 50% 40%, #1a2330, #0b0f16);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
  text-align: center;
  box-shadow: 0 10px 30px rgba(31,42,55,0.10);
}
.product-figure img {
  margin: 0 auto;
  max-width: 320px;
  width: 100%;
}
.product-figure figcaption {
  margin-top: 12px;
  color: #fff;
  font-weight: 700;
  letter-spacing: 0.5px;
}

/* Clientele carousel */
.clients .section-head { margin-bottom: 36px; }
.marquee {
  position: relative;
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
          mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.marquee-track {
  display: flex;
  width: max-content;
  gap: 16px;
  padding: 6px 8px;
  animation: clientScroll 40s linear infinite;
}
.marquee:hover .marquee-track { animation-play-state: paused; }
.client-chip {
  flex-shrink: 0;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: 14px 26px;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.5px;
  color: var(--brand-navy);
  white-space: nowrap;
  box-shadow: 0 2px 8px rgba(31,42,55,0.05);
  transition: border-color 0.15s ease, color 0.15s ease, transform 0.15s ease;
}
.client-chip:hover {
  border-color: var(--brand-green);
  color: var(--brand-green-dark);
  transform: translateY(-2px);
}
@keyframes clientScroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}
@media (prefers-reduced-motion: reduce) {
  .marquee-track { animation: none; flex-wrap: wrap; justify-content: center; width: auto; }
}

/* Forms */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.form-grid .full { grid-column: 1 / -1; }
label { font-weight: 600; color: var(--brand-navy); display: block; margin-bottom: 6px; font-size: 0.9rem; }
input, textarea, select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font: inherit;
  background: #fff;
  color: var(--text);
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--brand-green);
  box-shadow: 0 0 0 3px rgba(93,172,27,0.15);
}
textarea { resize: vertical; min-height: 140px; }

/* Contact info card */
.contact-info {
  background: var(--brand-navy);
  color: #e5e7eb;
  padding: 32px;
  border-radius: 10px;
}
.contact-info h3 { color: #fff; margin-top: 0; }
.contact-info .info-row {
  display: flex; gap: 14px; align-items: flex-start;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.contact-info .info-row:last-child { border-bottom: none; }
.contact-info .info-row .ico {
  width: 38px; height: 38px;
  background: var(--brand-green);
  color: #fff;
  border-radius: 8px;
  display: grid; place-items: center;
  flex-shrink: 0;
}
.contact-info .info-row strong { display: block; color: #fff; }
.contact-info a { color: #fff; }

/* Social icons */
.socials {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 16px;
}
.socials a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(255,255,255,0.08);
  color: #fff;
  transition: background 0.15s ease, transform 0.15s ease;
}
.socials a:hover {
  background: var(--brand-green);
  transform: translateY(-2px);
  text-decoration: none;
}
.socials a svg { width: 18px; height: 18px; fill: currentColor; }

.socials.on-light a {
  background: rgba(31,42,55,0.06);
  color: var(--brand-navy);
}
.socials.on-light a:hover {
  background: var(--brand-green);
  color: #fff;
}

/* Footer */
.site-footer {
  background: #0f1620;
  color: #cbd5e1;
  padding: 60px 0 20px;
  margin-top: 0;
}
.site-footer .grid { gap: 40px; }
.site-footer h4 { color: #fff; margin: 0 0 16px; font-size: 1rem; }
.site-footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.site-footer a { color: #cbd5e1; }
.site-footer a:hover { color: var(--brand-green); text-decoration: none; }
.site-footer .footer-brand p { color: #94a3b8; font-size: 0.95rem; }
.site-footer .copyright {
  border-top: 1px solid rgba(255,255,255,0.08);
  margin-top: 40px;
  padding-top: 20px;
  text-align: center;
  font-size: 0.85rem;
  color: #94a3b8;
}

/* WhatsApp floating chat button */
.wa-chat {
  position: fixed;
  bottom: 22px;
  right: 22px;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 10px;
  background: #25D366;
  color: #fff;
  padding: 12px 18px 12px 14px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  box-shadow: 0 8px 24px rgba(37,211,102,0.35), 0 2px 6px rgba(0,0,0,0.15);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.wa-chat:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(37,211,102,0.45), 0 4px 8px rgba(0,0,0,0.2);
  text-decoration: none;
  color: #fff;
}
.wa-chat .wa-icon {
  width: 28px; height: 28px;
  display: grid; place-items: center;
}
.wa-chat .wa-icon svg { width: 28px; height: 28px; fill: #fff; }
.wa-chat .wa-pulse {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  border-radius: 50px;
  box-shadow: 0 0 0 0 rgba(37,211,102,0.6);
  animation: waPulse 2s infinite;
  pointer-events: none;
}
@keyframes waPulse {
  0% { box-shadow: 0 0 0 0 rgba(37,211,102,0.5); }
  70% { box-shadow: 0 0 0 16px rgba(37,211,102,0); }
  100% { box-shadow: 0 0 0 0 rgba(37,211,102,0); }
}

@media (max-width: 640px) {
  .wa-chat {
    bottom: 16px;
    right: 16px;
    padding: 12px;
  }
  .wa-chat .wa-label { display: none; }
}

/* Responsive */
@media (max-width: 880px) {
  .grid.cols-3, .grid.cols-4 { grid-template-columns: repeat(2, 1fr); }
  .two-col { grid-template-columns: 1fr; gap: 30px; }
  .form-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .nav {
    display: none;
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 16px 20px;
    gap: 12px;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 6px 20px rgba(0,0,0,0.06);
  }
  .nav.open { display: flex; }
  .nav-toggle { display: block; }
  .grid.cols-2, .grid.cols-3, .grid.cols-4 { grid-template-columns: 1fr; }
  .hero { padding: 60px 0; }
  section { padding: 50px 0; }
}