/* ============================================================
   AAA GAS ENGINEERING — MAIN STYLESHEET
   File: css/style.css

   TABLE OF CONTENTS:
   1.  CSS Variables & Reset
   2.  Typography
   3.  Navigation + Mobile Menu
   4.  Hero Section
   5.  Certifications Bar
   6.  About Section
   7.  Products Carousel
   8.  Why Us Section
   9.  Contact Section
   10. Footer
   11. Floating WhatsApp Button
   12. Animations & Utilities
   13. Responsive — Tablet (max 900px)
   14. Responsive — Mobile (max 600px)
   15. Responsive — Small Mobile (max 400px)
============================================================ */


/* ============================================================
   1. CSS VARIABLES & RESET
============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --navy:       #0b1c35;
  --blue:       #1557c0;
  --blue-light: #2472e8;
  --steel:      #4a6080;
  --silver:     #e8edf5;
  --white:      #ffffff;
  --gold:       #f0a500;
  --text:       #1a2840;
  --muted:      #5a7294;
  --nav-h:      70px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Barlow', sans-serif;
  color: var(--text);
  background: var(--white);
  overflow-x: hidden;
}

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


/* ============================================================
   2. TYPOGRAPHY
============================================================ */
h1, h2, h3, h4 {
  font-family: 'Barlow Condensed', sans-serif;
  line-height: 1;
}

.section-tag {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--blue);
  margin-bottom: 12px;
}

.section-title {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: clamp(28px, 5vw, 52px);
  font-weight: 800;
  line-height: 1;
  color: var(--navy);
  margin-bottom: 16px;
}

.section-sub {
  font-size: 16px;
  color: var(--muted);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 50px;
  font-weight: 300;
}

section {
  padding: 90px 5%;
}


/* ============================================================
   3. NAVIGATION + MOBILE MENU
============================================================ */
nav {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(11, 28, 53, 0.97);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding: 0 5%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-h);
  gap: 16px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-icon img {
  width: 100px;
  height: 100px;
  object-fit: contain;
}

.logo-text {
  color: white;
}

.logo-text strong {
  display: block;
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.5px;
  line-height: 1.1;
}

.logo-text span {
  font-size: 10px;
  color: rgba(255, 255, 255, 0.45);
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  transition: color 0.2s;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active {
  color: white;
}

.nav-cta {
  background: var(--blue);
  color: white;
  padding: 9px 20px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  letter-spacing: 0.5px;
  text-decoration: none;
  transition: background 0.2s;
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-cta:hover {
  background: var(--blue-light);
}

/* Hamburger button */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: white;
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

.hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.open span:nth-child(2) {
  opacity: 0;
}
.hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile dropdown menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0;
  width: 100%;
  background: rgba(11, 28, 53, 0.98);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 999;
  flex-direction: column;
  padding: 16px 0 24px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transform: translateY(-10px);
  opacity: 0;
  transition: transform 0.25s ease, opacity 0.25s ease;
  pointer-events: none;
}

.mobile-menu.open {
  display: flex;
  transform: translateY(0);
  opacity: 1;
  pointer-events: all;
}

.mobile-menu a {
  color: rgba(255,255,255,0.8);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  padding: 14px 6%;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  transition: color 0.2s, background 0.2s;
}

.mobile-menu a:hover {
  color: white;
  background: rgba(255,255,255,0.04);
}

.mobile-menu .mobile-cta {
  background: var(--blue);
  color: white;
  margin: 16px 6% 0;
  border-radius: 8px;
  text-align: center;
  border-bottom: none;
}

.mobile-menu .mobile-cta:hover {
  background: var(--blue-light);
}


/* ============================================================
   4. HERO SECTION
============================================================ */
.hero {
  min-height: 100vh;
  background: var(--navy);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 120px 5% 60px;
}

.hero-bg-image {
  position: absolute;
  inset: 0;
  background-image: url('../images/hero-bg.png');
  background-repeat: no-repeat;
  background-size: 48%;
  background-position: right 6% center;
  opacity: 1;
  filter: drop-shadow(0 20px 40px rgba(0,0,0,0.5));
}

.hero-bg-gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 70% 50%, rgba(21, 87, 192, 0.18) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 20% 80%, rgba(21, 87, 192, 0.1) 0%, transparent 60%);
}

.hero-grid {
  position: absolute;
  inset: 0;
  opacity: 0.04;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.5) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.5) 1px, transparent 1px);
  background-size: 50px 50px;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 620px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 100px;
  padding: 6px 16px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 28px;
}

.hero-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--gold);
  border-radius: 50%;
  flex-shrink: 0;
  animation: pulse 2s infinite;
}

.hero h1 {
  font-size: clamp(38px, 7vw, 82px);
  font-weight: 800;
  line-height: 0.95;
  color: white;
  letter-spacing: -1px;
  margin-bottom: 24px;
}

.hero h1 span {
  color: var(--blue-light);
}

.hero-sub {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.6);
  max-width: 480px;
  line-height: 1.7;
  margin-bottom: 36px;
  font-weight: 300;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn-primary {
  background: var(--blue);
  color: white;
  padding: 13px 28px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
  letter-spacing: 0.5px;
  transition: all 0.2s;
  display: inline-block;
}

.btn-primary:hover {
  background: var(--blue-light);
  transform: translateY(-1px);
}

.btn-whatsapp {
  background: #25D366;
  color: white;
  padding: 13px 28px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
  letter-spacing: 0.5px;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-whatsapp:hover {
  background: #20ba5a;
  transform: translateY(-1px);
}

.hero-stats {
  position: relative;
  z-index: 2;
  display: flex;
  gap: 36px;
  margin-top: 56px;
  flex-wrap: wrap;
}

.stat-num {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 42px;
  font-weight: 800;
  color: white;
  line-height: 1;
}

.stat-num span {
  color: var(--blue-light);
}

.stat-label {
  font-size: 11px;
  color: rgba(255, 255, 255, 0.45);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-top: 4px;
}

.stat-divider {
  width: 1px;
  background: rgba(255, 255, 255, 0.12);
  align-self: stretch;
}


/* ============================================================
   5. CERTIFICATIONS BAR
============================================================ */
.cert-bar {
  background: var(--silver);
  border-bottom: 1px solid #d8e2f0;
  padding: 16px 5%;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.cert-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--muted);
  margin-right: 8px;
  white-space: nowrap;
}

.cert-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: white;
  border: 1px solid #d0daea;
  border-radius: 4px;
  padding: 5px 12px;
  font-size: 12px;
  font-weight: 600;
  color: var(--navy);
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.cert-badge::before {
  content: '✓';
  color: var(--blue);
  font-weight: 700;
}

.branch-note {
  margin-left: auto;
  font-size: 12px;
  color: var(--muted);
  font-style: italic;
  white-space: nowrap;
}


/* ============================================================
   6. ABOUT SECTION
============================================================ */
.about {
  background: white;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-visual {
  background: var(--navy);
  border-radius: 16px;
  position: relative;
  overflow: hidden;
  min-height: 400px;
}

.about-visual-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.85;
  display: block;
  position: absolute;
  inset: 0;
}

.about-visual-overlay {
  position: absolute;
  inset: 0;
  padding: 36px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  background: linear-gradient(to top, rgba(11,28,53,0.95) 50%, rgba(11,28,53,0.25) 100%);
  z-index: 2;
}

.about-visual::before {
  content: '';
  position: absolute;
  top: -40px;
  right: -40px;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(36, 114, 232, 0.2), transparent 70%);
  z-index: 1;
}

.about-year {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 100px;
  font-weight: 800;
  color: rgba(255, 255, 255, 0.05);
  line-height: 1;
  position: absolute;
  bottom: 20px;
  right: 20px;
  z-index: 1;
  pointer-events: none;
}

.about-fact {
  position: relative;
  z-index: 3;
  border-left: 3px solid var(--blue);
  padding-left: 18px;
  margin-bottom: 22px;
}

.about-fact:last-child {
  margin-bottom: 0;
}

.about-fact-num {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 34px;
  font-weight: 800;
  color: white;
  line-height: 1;
}

.about-fact-label {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
  margin-top: 3px;
}

.about-text p {
  font-size: 16px;
  line-height: 1.8;
  color: #3a5070;
  margin-bottom: 18px;
  font-weight: 300;
}

.about-highlights {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 28px;
}

.highlight-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--text);
  font-weight: 500;
}

.highlight-item::before {
  content: '';
  width: 8px;
  height: 8px;
  min-width: 8px;
  background: var(--blue);
  border-radius: 50%;
}


/* ============================================================
   7. PRODUCTS CAROUSEL
============================================================ */
.products {
  background: var(--silver);
  overflow: hidden;
}

/* Carousel container wraps track + buttons */
.carousel-container {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0;
}

.carousel-track-wrapper {
  overflow: hidden;
  width: 100%;
  cursor: grab;
  user-select: none;
}

.carousel-track-wrapper:active {
  cursor: grabbing;
}

.carousel-track {
  display: flex;
  gap: 24px;
  transition: transform 0.45s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  will-change: transform;
}

/* Arrow buttons */
.carousel-btn {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1.5px solid rgba(11,28,53,0.15);
  background: white;
  color: var(--navy);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
  z-index: 2;
  position: relative;
}

.carousel-btn:hover {
  background: var(--navy);
  color: white;
  border-color: var(--navy);
  transform: scale(1.05);
}

.carousel-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
  transform: none;
}

.carousel-prev { margin-right: 16px; }
.carousel-next { margin-left: 16px; }

/* Product cards inside carousel */
.product-card {
  background: white;
  border-radius: 14px;
  border: 1px solid #dce6f5;
  overflow: hidden;
  transition: all 0.3s;
  position: relative;
  flex-shrink: 0;
  /* Width set by JS based on viewport */
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--blue), var(--blue-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s;
  z-index: 1;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 50px rgba(11, 28, 53, 0.12);
  border-color: #b0c8ee;
}

.product-card:hover::before {
  transform: scaleX(1);
}

.product-img-wrapper {
  width: 100%;
  aspect-ratio: 1 
  / 1;
  overflow: hidden;
  background: linear-gradient(135deg, #e8f0fc, #c5d9f5);
}

.product-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}

.product-card:hover .product-img-wrapper img {
  transform: scale(1.05);
}

.product-body {
  padding: 24px 26px 28px;
}

.product-badge {
  display: inline-block;
  background: rgba(21, 87, 192, 0.08);
  color: var(--blue);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 100px;
  margin-bottom: 10px;
}

.product-name {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 22px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 10px;
  letter-spacing: 0.3px;
}

.product-desc {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
  font-weight: 300;
}

.product-inquiry {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 20px;
  font-size: 13px;
  font-weight: 600;
  color: var(--blue);
  text-decoration: none;
  transition: gap 0.2s;
}

.product-inquiry:hover {
  gap: 10px;
}

.product-inquiry::after {
  content: '→';
}

/* Dots */
.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 28px;
}

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(11,28,53,0.2);
  border: none;
  cursor: pointer;
  transition: all 0.25s;
  padding: 0;
}

.carousel-dot.active {
  background: var(--blue);
  width: 24px;
  border-radius: 4px;
}


/* ============================================================
   8. WHY US SECTION
============================================================ */
.why {
  background: var(--navy);
}

.why .section-title { color: white; }
.why .section-tag   { color: var(--gold); }
.why .section-sub   { color: rgba(255, 255, 255, 0.5); }

.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px;
}

.why-item {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.07);
  padding: 36px 28px;
  transition: background 0.2s;
}

.why-item:hover {
  background: rgba(255, 255, 255, 0.08);
}

.why-num {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 48px;
  font-weight: 800;
  color: rgba(255, 255, 255, 0.06);
  line-height: 1;
  margin-bottom: 14px;
}

.why-icon {
  font-size: 26px;
  margin-bottom: 14px;
}

.why-title {
  font-size: 16px;
  font-weight: 600;
  color: white;
  margin-bottom: 10px;
}

.why-text {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.4);
  line-height: 1.7;
  font-weight: 300;
}


/* ============================================================
   9. CONTACT SECTION
============================================================ */
.contact {
  background: white;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 72px;
  align-items: start;
}

.contact-info h3 {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 26px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 24px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 22px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--silver);
}

.contact-item:last-of-type {
  border-bottom: none;
}

.contact-icon {
  width: 42px;
  height: 42px;
  min-width: 42px;
  background: linear-gradient(135deg, #e8f0fc, #c5d9f5);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.contact-item-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--muted);
  font-weight: 600;
}

.contact-item-val {
  font-size: 15px;
  font-weight: 500;
  color: var(--navy);
  margin-top: 3px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--muted);
}

input, textarea, select {
  border: 1.5px solid #dce6f5;
  border-radius: 8px;
  padding: 12px 14px;
  font-family: 'Barlow', sans-serif;
  font-size: 15px;
  color: var(--navy);
  transition: border-color 0.2s;
  outline: none;
  background: white;
  width: 100%;
}

input:focus, textarea:focus, select:focus {
  border-color: var(--blue);
}

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

.form-submit {
  background: var(--blue);
  color: white;
  border: none;
  border-radius: 8px;
  padding: 14px 28px;
  font-family: 'Barlow', sans-serif;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: all 0.2s;
  align-self: flex-start;
}

.form-submit:hover {
  background: var(--blue-light);
  transform: translateY(-1px);
}


/* ============================================================
   10. FOOTER
============================================================ */
footer {
  background: #060e1c;
  padding: 50px 5% 30px;
  color: rgba(255, 255, 255, 0.4);
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 36px;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.footer-brand strong {
  display: block;
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 20px;
  font-weight: 700;
  color: white;
  letter-spacing: 1px;
}

.footer-brand p {
  font-size: 13px;
  margin-top: 8px;
  max-width: 260px;
  line-height: 1.6;
}

.footer-links h4 {
  color: rgba(255, 255, 255, 0.7);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 14px;
}

.footer-links ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.4);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s;
}

.footer-links a:hover { color: white; }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 12px;
}

.footer-bottom span { color: rgba(255, 255, 255, 0.55); }


/* ============================================================
   11. FLOATING WHATSAPP BUTTON
============================================================ */
.float-wa {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 999;
  width: 56px;
  height: 56px;
  background: #25D366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
  text-decoration: none;
  transition: transform 0.2s;
  animation: bounce 3s infinite;
}

.float-wa:hover {
  transform: scale(1.1);
  animation: none;
}

.float-wa svg {
  width: 28px;
  height: 28px;
  fill: white;
}


/* ============================================================
   12. ANIMATIONS & UTILITIES
============================================================ */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.3; }
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-6px); }
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}


/* ============================================================
   13. RESPONSIVE — TABLET (max-width: 960px)
============================================================ */
@media (max-width: 960px) {

  /* Nav: hide links + CTA, show hamburger */
  .nav-links,
  .nav-cta {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  /* Hero */
  .hero {
    min-height: auto;
    padding: 110px 5% 60px;
    align-items: flex-start;
  }

  .hero-bg-image {
    background-size: 50%;
    background-position: right 2% center;
    opacity: 1;
  }

  .hero-stats {
    gap: 24px;
    margin-top: 44px;
  }

  .stat-divider {
    display: none;
  }

  /* About */
  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about-visual {
    min-height: 340px;
  }

  /* Why */
  .why-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Contact */
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  /* Footer */
  .footer-top {
    flex-direction: column;
    gap: 28px;
  }

  .branch-note {
    display: none;
  }
}


/* ============================================================
   14. RESPONSIVE — MOBILE (max-width: 600px)
============================================================ */
@media (max-width: 600px) {

  section {
    padding: 64px 5%;
  }

  /* Hero */
  .hero {
    padding: 100px 5% 200px;
    justify-content: flex-start;
  }

  .hero-bg-image {
    opacity: 1;
    background-size: 88%;
    background-position: center bottom 10px;
    filter: drop-shadow(0 10px 30px rgba(0,0,0,0.5));
  }

  /* Keep text readable over image at bottom */
  

  .hero h1 {
    font-size: clamp(36px, 10vw, 54px);
  }

  .hero-sub {
    font-size: 15px;
  }

  .hero-badge {
    font-size: 10px;
    padding: 5px 12px;
  }

  .hero-actions {
    flex-direction: column;
    gap: 12px;
  }

  .btn-primary,
  .btn-whatsapp {
    width: 100%;
    justify-content: center;
    padding: 14px 20px;
  }

  .hero-stats {
    flex-direction: row;
    gap: 20px;
    margin-top: 36px;
  }

  .stat-num {
    font-size: 32px;
  }

  /* Cert bar */
  .cert-bar {
    gap: 7px;
    padding: 12px 5%;
  }

  .cert-badge {
    font-size: 11px;
    padding: 4px 10px;
  }

  /* About */
  .about-visual {
    min-height: 280px;
  }

  .about-year {
    font-size: 70px;
  }

  /* Products carousel buttons */
  .carousel-prev,
  .carousel-next {
    width: 38px;
    height: 38px;
  }

  .carousel-prev { margin-right: 10px; }
  .carousel-next { margin-left: 10px; }

  /* Why */
  .why-grid {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .why-item {
    padding: 28px 20px;
  }

  /* Contact form */
  .form-row {
    grid-template-columns: 1fr;
  }

  .form-submit {
    width: 100%;
    text-align: center;
  }

  /* Footer */
  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 6px;
  }
}


/* ============================================================
   15. RESPONSIVE — SMALL MOBILE (max-width: 400px)
============================================================ */
@media (max-width: 400px) {

  .logo-icon img {
    width: 80px;
    height: 80px;
  }

  .logo-text strong {
    font-size: 13px;
  }

  .logo-text span {
    display: none;
  }

  .hero h1 {
    font-size: 34px;
  }

  .hero-stats {
    gap: 14px;
  }

  .stat-num {
    font-size: 28px;
  }

  .stat-label {
    font-size: 9px;
  }

  .section-title {
    font-size: 28px;
  }
}
/* ═══════════════════════════════════════
   LPG VAPORIZER SECTION
═══════════════════════════════════════ */

.lpg-vaporizer-section{
  padding:80px 5%;
  background:#f8fafc;
}

.lpg-container{
  max-width:1200px;
  margin:0 auto;
}

.vaporizer-title{
  font-size:clamp(32px,5vw,54px);
  line-height:1.15;
  margin-top:18px;
  margin-bottom:24px;
}

.vaporizer-desc{
  color:var(--muted);
  font-size:16px;
  line-height:1.8;
  max-width:750px;
  margin-bottom:40px;
}

/* GRID */

.vaporizer-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:40px;
  align-items:center;
}

/* IMAGE */

.vaporizer-image img{
  width:100%;
  border-radius:16px;
  background:white;
  padding:24px;
  box-sizing:border-box;
}

/* CAPACITY GRID */

.capacity-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:12px;
  margin-bottom:28px;
}

.capacity-box{
  background:white;
  border:1px solid #e8edf5;
  border-radius:12px;
  padding:16px;
  text-align:center;
}

.capacity-number{
  font-family:'Barlow Condensed',sans-serif;
  font-size:26px;
  font-weight:800;
  color:var(--navy);
}

.capacity-number.gold{
  color:var(--gold);
}

.capacity-text{
  font-size:12px;
  color:var(--muted);
}

/* FEATURES */

.feature-list{
  display:flex;
  flex-direction:column;
  gap:10px;
  margin-bottom:28px;
}

.feature-item{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:14px;
  color:var(--text);
}

.feature-item i{
  color:var(--blue);
  font-size:18px;
  flex-shrink:0;
}

/* BUTTONS */

.button-group{
  display:flex;
  gap:12px;
  flex-wrap:wrap;
}

.btn-primary-custom{
  background:var(--blue);
  color:white;
  padding:13px 28px;
  border-radius:6px;
  font-family:'Barlow Condensed',sans-serif;
  font-weight:700;
  font-size:16px;
  text-decoration:none;
  display:inline-flex;
  align-items:center;
  gap:8px;
}

.btn-outline-custom{
  background:white;
  color:var(--blue);
  border:1px solid var(--blue);
  padding:13px 22px;
  border-radius:6px;
  font-family:'Barlow Condensed',sans-serif;
  font-weight:600;
  font-size:15px;
  text-decoration:none;
  display:inline-flex;
  align-items:center;
  gap:6px;
}

/* ═════════ MOBILE OPTIMIZATION ═════════ */

@media(max-width:768px){

  .lpg-vaporizer-section{
    padding:60px 20px;
  }

  .vaporizer-grid{
    grid-template-columns:1fr;
  }

  /* IMAGE FIRST */

  .vaporizer-image{
    order:1;
  }

  .vaporizer-content{
    order:2;
  }

  .vaporizer-title{
    font-size:32px;
    line-height:1.2;
  }

  .vaporizer-desc{
    font-size:15px;
    line-height:1.8;
  }

  .button-group{
    flex-direction:column;
  }

  .btn-primary-custom,
  .btn-outline-custom{
    width:100%;
    justify-content:center;
  }

}

@media(max-width:480px){

  .vaporizer-title{
    font-size:28px;
  }

  .vaporizer-desc{
    font-size:14px;
    line-height:1.7;
  }

  .capacity-grid{
    grid-template-columns:1fr;
  }

}