@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&display=swap');

:root {
  --bg-dark: #070a13;
  --bg-card: rgba(14, 22, 40, 0.75);
  --bg-card-hover: rgba(20, 30, 55, 0.85);
  --bg-elevated: #0f182a;
  --border-glass: rgba(56, 189, 248, 0.16);
  --border-glass-hover: rgba(56, 189, 248, 0.4);
  --accent-cyan: #06b6d4;
  --accent-blue: #2563eb;
  --accent-sky: #38bdf8;
  --accent-glow: 0 0 25px rgba(6, 182, 212, 0.35);
  --accent-emerald: #10b981;
  --accent-orange: #f97316;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-subtle: #64748b;
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-main);
  font-weight: 700;
  line-height: 1.25;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Background Gradients */
.bg-mesh {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: -1;
  background: 
    radial-gradient(circle at 15% 20%, rgba(6, 182, 212, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 85% 60%, rgba(37, 99, 235, 0.08) 0%, transparent 45%),
    radial-gradient(circle at 50% 90%, rgba(16, 185, 129, 0.04) 0%, transparent 50%);
}

/* Utility Top Bar */
.topbar {
  background: rgba(7, 10, 19, 0.9);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.85rem;
  color: var(--text-muted);
  padding: 8px 0;
}
.topbar-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.topbar-links {
  display: flex;
  gap: 20px;
  align-items: center;
}
.topbar-links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
}
.topbar-links a:hover {
  color: var(--accent-sky);
}
.topbar-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent-emerald);
  background: rgba(16, 185, 129, 0.1);
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-weight: 500;
}
.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  box-shadow: 0 0 8px var(--accent-emerald);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

/* Sticky Header & Navbar */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(7, 10, 19, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-glass);
}
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}
.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand-logo img {
  height: 52px;
  width: auto;
  object-fit: contain;
}
.brand-text {
  display: flex;
  flex-direction: column;
}
.brand-title {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, #ffffff 40%, var(--accent-sky) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.brand-sub {
  font-size: 0.65rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--accent-cyan);
  font-weight: 600;
}

.nav-menu {
  display: flex;
  gap: 28px;
  align-items: center;
  list-style: none;
}
.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  padding: 8px 0;
}
.nav-link:hover, .nav-link.active {
  color: #fff;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-blue));
  transition: var(--transition);
  border-radius: 2px;
}
.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

/* Dropdown */
.nav-item-dropdown {
  position: relative;
}
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  width: 260px;
  background: rgba(11, 17, 32, 0.95);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 10px 0;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: var(--transition);
  list-style: none;
}
.nav-item-dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.dropdown-item a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.dropdown-item a:hover {
  color: #fff;
  background: rgba(6, 182, 212, 0.1);
  padding-left: 22px;
}

/* Header CTAs */
.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  cursor: pointer;
  border: none;
  transition: var(--transition);
  font-family: var(--font-body);
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  color: #fff;
  box-shadow: 0 4px 18px rgba(6, 182, 212, 0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(6, 182, 212, 0.55);
}
.btn-whatsapp {
  background: #25D366;
  color: #fff;
  box-shadow: 0 4px 15px rgba(37, 211, 102, 0.3);
}
.btn-whatsapp:hover {
  background: #20BA56;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 211, 102, 0.5);
}
.btn-outline {
  background: transparent;
  color: var(--text-main);
  border: 1px solid var(--border-glass-hover);
}
.btn-outline:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--accent-sky);
}
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero Section */
.hero {
  position: relative;
  padding: 90px 0 70px;
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 50px;
  align-items: center;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(6, 182, 212, 0.12);
  border: 1px solid rgba(6, 182, 212, 0.3);
  color: var(--accent-sky);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 20px;
}
.hero-title {
  font-size: 3.4rem;
  letter-spacing: -1px;
  margin-bottom: 20px;
  line-height: 1.12;
}
.hero-title span {
  background: linear-gradient(135deg, var(--accent-sky), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-desc {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 34px;
  max-width: 560px;
}
.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.hero-badges {
  display: flex;
  gap: 30px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.hero-stat-item strong {
  display: block;
  font-size: 1.7rem;
  font-family: var(--font-heading);
  color: #fff;
  font-weight: 800;
}
.hero-stat-item span {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* Hero Visual Card */
.hero-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 34px;
  position: relative;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
}
.hero-card::before {
  content: '';
  position: absolute;
  top: -2px; left: -2px; right: -2px; bottom: -2px;
  background: linear-gradient(135deg, var(--accent-cyan), transparent 60%);
  border-radius: var(--radius-lg);
  z-index: -1;
  opacity: 0.4;
}
.card-header-badge {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}
.cylinder-preview-box {
  display: flex;
  justify-content: space-around;
  align-items: flex-end;
  height: 220px;
  padding: 20px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 24px;
}
.cylinder-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.cylinder-icon {
  width: 44px;
  height: 140px;
  border-radius: 20px 20px 6px 6px;
  background: linear-gradient(180deg, #38bdf8 0%, #0369a1 100%);
  position: relative;
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.4);
}
.cylinder-icon.med {
  background: linear-gradient(180deg, #ffffff 0%, #0284c7 100%);
}
.cylinder-icon.ind {
  background: linear-gradient(180deg, #10b981 0%, #065f46 100%);
}
.cylinder-icon.quad {
  width: 90px;
  height: 160px;
  background: linear-gradient(180deg, #64748b 0%, #1e293b 100%);
  border: 2px solid #38bdf8;
  border-radius: 8px;
}
.cylinder-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}

/* Interactive Quick Quote Widget */
.quick-rfq-box h4 {
  font-size: 1.15rem;
  margin-bottom: 14px;
}
.rfq-inline-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 14px;
}
.form-control {
  width: 100%;
  padding: 10px 14px;
  background: rgba(7, 10, 19, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-sm);
  color: #fff;
  font-family: var(--font-body);
  font-size: 0.9rem;
  outline: none;
  transition: var(--transition);
}
.form-control:focus {
  border-color: var(--accent-sky);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.2);
}

/* Sections */
.section {
  padding: 80px 0;
  position: relative;
}
.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 54px;
}
.section-tag {
  color: var(--accent-sky);
  font-size: 0.85rem;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 1.5px;
  margin-bottom: 10px;
  display: block;
}
.section-title {
  font-size: 2.5rem;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}
.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
}

/* Gas Product Cards Grid */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 26px;
}
.gas-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}
.gas-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-glass-hover);
  box-shadow: 0 16px 35px rgba(0, 0, 0, 0.45);
  background: var(--bg-card-hover);
}

.gas-card-img-wrap {
  width: 100%;
  height: 240px;
  background: #ffffff;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  margin-bottom: 20px;
  padding: 10px;
  box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.gas-card-img-wrap img,
.cylinder-photo {
  height: 215px !important;
  max-height: 215px !important;
  width: auto !important;
  max-width: 90% !important;
  object-fit: contain !important;
  display: block !important;
  margin: 0 auto !important;
  transition: transform 0.35s ease;
  filter: drop-shadow(0 6px 14px rgba(0, 0, 0, 0.18));
}

.gas-card:hover .gas-card-img-wrap img,
.gas-card:hover .cylinder-photo {
  transform: scale(1.06);
}
.gas-card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 18px;
}
.gas-formula-badge {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--accent-sky);
  background: rgba(56, 189, 248, 0.1);
  padding: 4px 14px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(56, 189, 248, 0.2);
}
.gas-card-purity {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent-emerald);
  background: rgba(16, 185, 129, 0.12);
  padding: 4px 10px;
  border-radius: var(--radius-full);
}
.gas-card h3 {
  font-size: 1.35rem;
  margin-bottom: 10px;
}
.gas-card p {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin-bottom: 20px;
  flex-grow: 1;
}
.gas-specs-list {
  list-style: none;
  margin-bottom: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.85rem;
}
.gas-specs-list li {
  display: flex;
  justify-content: space-between;
  color: var(--text-muted);
}
.gas-specs-list li strong {
  color: var(--text-main);
}
.gas-card-actions {
  display: flex;
  gap: 12px;
  margin-top: auto;
}
.gas-card-actions .btn {
  flex: 1;
  padding: 9px 12px;
  font-size: 0.85rem;
}

/* Feature/Pillars Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}
.feature-box {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: var(--transition);
}
.feature-box:hover {
  border-color: var(--accent-sky);
  transform: translateY(-3px);
}
.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.2), rgba(37, 99, 235, 0.2));
  border: 1px solid rgba(56, 189, 248, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: var(--accent-sky);
  margin-bottom: 18px;
}
.feature-box h4 {
  font-size: 1.2rem;
  margin-bottom: 10px;
}
.feature-box p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Delivery Network Grid */
.zones-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.zone-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 22px;
}
.zone-card h4 {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--accent-sky);
  margin-bottom: 12px;
  font-size: 1.15rem;
}
.zone-card ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.zone-card ul li::before {
  content: '✓';
  color: var(--accent-emerald);
  margin-right: 8px;
}

/* Product Detail Page Specifics */
.product-hero {
  padding: 70px 0 50px;
  border-bottom: 1px solid var(--border-glass);
  background: radial-gradient(circle at 70% 30%, rgba(6, 182, 212, 0.12) 0%, transparent 60%);
}
.product-hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
}
.spec-table-box {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: 40px 0;
}
.spec-table {
  width: 100%;
  border-collapse: collapse;
}
.spec-table th, .spec-table td {
  padding: 14px 20px;
  text-align: left;
}
.spec-table th {
  background: rgba(6, 182, 212, 0.1);
  color: var(--accent-sky);
  font-family: var(--font-heading);
  font-size: 0.95rem;
  border-bottom: 1px solid var(--border-glass);
}
.spec-table tr:not(:last-child) td {
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.spec-table td:first-child {
  font-weight: 600;
  color: var(--text-main);
  width: 35%;
}
.spec-table td:last-child {
  color: var(--text-muted);
}

/* FAQ Accordion */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 860px;
  margin: 0 auto;
}
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}
.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: none;
  border: none;
  color: #fff;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  text-align: left;
}
.faq-question:hover {
  color: var(--accent-sky);
}
.faq-answer {
  padding: 0 24px 20px;
  color: var(--text-muted);
  font-size: 0.95rem;
  display: none;
  line-height: 1.6;
}
.faq-item.active .faq-answer {
  display: block;
}

/* RFQ Modal */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; width: 100vw; height: 100vh;
  background: rgba(3, 7, 18, 0.8);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}
.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}
.modal-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-glass-hover);
  border-radius: var(--radius-lg);
  padding: 36px;
  width: 100%;
  max-width: 540px;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.8);
  position: relative;
}
.modal-close {
  position: absolute;
  top: 20px; right: 20px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Floating Contact CTAs */
.floating-actions {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 999;
}
.floating-btn {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  transition: var(--transition);
  color: #fff;
  font-size: 1.6rem;
}
.floating-btn:hover {
  transform: scale(1.1);
}
.floating-wa { background: #25D366; }
.floating-call { background: var(--accent-blue); }

/* Footer */
.site-footer {
  background: #04070e;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 70px 0 24px;
  font-size: 0.92rem;
  color: var(--text-muted);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.9fr 0.9fr 1.1fr;
  gap: 40px;
  margin-bottom: 50px;
}
.footer-col h5 {
  color: #fff;
  font-size: 1.1rem;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 8px;
}
.footer-col h5::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 30px; height: 2px;
  background: var(--accent-cyan);
}
.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a:hover {
  color: var(--accent-sky);
  padding-left: 4px;
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 24px;
  font-size: 0.82rem;
}

/* Responsive */
@media (max-width: 1024px) {
  .hero-grid, .product-hero-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .topbar { display: none; }
  .nav-menu { display: none; }
  .nav-menu.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 80px; left: 0; width: 100%;
    background: var(--bg-elevated);
    padding: 24px;
    border-bottom: 1px solid var(--border-glass);
  }
  .mobile-toggle { display: block; }
  .hero-title { font-size: 2.4rem; }
  .products-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
}