:root {
  /* Brand Colors */
  --color-primary: #D32F2F; /* Red */
  --color-primary-dark: #B71C1C;
  --color-dark: #212121; /* Dark Gray */
  --color-dark-light: #424242;
  --color-light: #FFFFFF; /* White */
  --color-gray-100: #F5F5F5;
  --color-gray-200: #EEEEEE;
  --color-gray-300: #E0E0E0;
  
  /* Text Colors */
  --color-text-main: #333333;
  --color-text-muted: #666666;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  
  /* Transitions */
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
  font-family: 'Inter', sans-serif;
  color: var(--color-text-main);
  background-color: var(--color-light);
}

body {
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

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

/* Utilities */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 80px 0;
}

.section-title {
  text-align: center;
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 40px;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background-color: var(--color-primary);
  margin: 15px auto 0;
  border-radius: 2px;
}

.btn {
  display: inline-block;
  padding: 14px 28px;
  font-size: 1.1rem;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  border: none;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-light) !important;
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover {
  background-color: var(--color-primary);
  color: var(--color-light);
}

/* --- Navigation --- */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

header.scrolled {
  padding: 5px 0;
  box-shadow: var(--shadow-md);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100px;
}

.logo img {
  height: 75px;
  object-fit: contain;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
}

.nav-links a {
  font-weight: 500;
  color: var(--color-dark);
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--color-primary);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--color-dark);
  cursor: pointer;
}

/* --- Hero Section --- */
.hero {
  height: 100vh;
  min-height: 600px;
  background-color: var(--color-dark);
  position: relative;
  display: flex;
  align-items: center;
  color: var(--color-light);
  margin-top: 0;
  padding-top: 100px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url('assets/hero_bg.png');
  background-size: cover;
  background-position: center;
  opacity: 0.4;
  z-index: 1;
}

.hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to right, rgba(33, 33, 33, 0.9) 0%, rgba(33, 33, 33, 0.4) 100%);
  z-index: 2;
}

.hero .container {
  position: relative;
  z-index: 3;
}

.hero-content {
  max-width: 600px;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
}

.hero-title span {
  color: var(--color-primary);
}

.hero-subtitle {
  font-size: 1.2rem;
  font-weight: 400;
  margin-bottom: 30px;
  color: var(--color-gray-200);
}

.hero-subtitle ul {
  margin-top: 15px;
}

.hero-subtitle li {
  margin-bottom: 8px;
  display: flex;
  align-items: center;
}

.hero-subtitle li i {
  color: var(--color-primary);
  margin-right: 10px;
}

.hero-buttons {
  display: flex;
  gap: 15px;
}

/* --- About Section --- */
.about {
  background-color: var(--color-gray-100);
}

.about-content {
  display: flex;
  align-items: center;
  gap: 50px;
}

.about-text {
  flex: 1;
}

.about-text p {
  font-size: 1.1rem;
  margin-bottom: 20px;
  color: var(--color-text-muted);
}

.about-image {
  flex: 1;
  position: relative;
}

.about-image img {
  border-radius: 8px;
  box-shadow: var(--shadow-lg);
}

/* --- Products Section --- */
.products-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}

.product-info h3 {
  font-size: 2rem;
  color: var(--color-dark);
  margin-bottom: 15px;
}

.product-info p {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  margin-bottom: 20px;
}

.product-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
  margin-bottom: 30px;
}

.feature-item {
  display: flex;
  align-items: center;
  background-color: var(--color-gray-100);
  padding: 10px 15px;
  border-radius: 6px;
  font-weight: 500;
}

.feature-item i {
  color: var(--color-primary);
  margin-right: 10px;
  font-size: 1.2rem;
}

.product-images {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.product-images img {
  border-radius: 8px;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.product-images img:hover {
  transform: scale(1.02);
}

/* --- Accessories Grid --- */
.accessories {
  background-color: var(--color-gray-100);
}

.accessories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.accessory-card {
  background-color: var(--color-light);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  text-align: center;
  padding: 20px;
}

.accessory-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.accessory-img-wrapper {
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 15px;
}

.accessory-img-wrapper img {
  max-height: 100%;
  object-fit: contain;
}

.accessory-card h4 {
  font-size: 1.2rem;
  color: var(--color-dark);
}

/* --- Custom Industrialization --- */
.industrialization {
  background-color: var(--color-dark);
  color: var(--color-light);
  text-align: center;
}

.industrialization .section-title {
  color: var(--color-light);
}

.industrialization-content {
  max-width: 800px;
  margin: 0 auto;
}

.industrialization-content p {
  font-size: 1.2rem;
  margin-bottom: 30px;
  color: var(--color-gray-300);
}

.industrialization-icon {
  font-size: 4rem;
  color: var(--color-primary);
  margin-bottom: 20px;
}

/* --- Differentials --- */
.differentials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-bottom: 50px;
}

.differential-item {
  display: flex;
  align-items: flex-start;
  padding: 20px;
  background-color: var(--color-light);
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--color-primary);
}

.differential-item i {
  font-size: 2rem;
  color: var(--color-primary);
  margin-right: 15px;
}

.differential-item h4 {
  font-size: 1.2rem;
  margin-bottom: 10px;
  color: var(--color-dark);
}

.differential-item p {
  color: var(--color-text-muted);
}

.nbr-seal {
  background-color: var(--color-gray-100);
  border: 2px dashed var(--color-primary);
  border-radius: 8px;
  padding: 30px;
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.nbr-seal i {
  font-size: 3rem;
  color: var(--color-primary);
  margin-bottom: 15px;
}

.nbr-seal h3 {
  font-size: 1.5rem;
  color: var(--color-dark);
  margin-bottom: 10px;
}

/* --- Service Regions --- */
.regions {
  background-color: var(--color-gray-100);
}

.regions-grid {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.region-item {
  background-color: var(--color-light);
  padding: 20px 40px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1.2rem;
  color: var(--color-dark);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
}

.region-item i {
  color: var(--color-primary);
  margin-right: 10px;
}

/* --- FAQ --- */
.faq {
  background-color: var(--color-light);
}

.faq-grid {
  max-width: 900px;
  margin: 0 auto;
  display: grid;
  gap: 16px;
}

.faq-grid details {
  background-color: var(--color-gray-100);
  border: 1px solid var(--color-gray-300);
  border-radius: 8px;
  padding: 18px 22px;
}

.faq-grid summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--color-dark);
}

.faq-grid p {
  margin-top: 12px;
  color: var(--color-text-muted);
}

/* --- Contact & Footer --- */
.contact-section {
  background-color: var(--color-dark);
  color: var(--color-light);
  padding: 60px 0;
}

.contact-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.contact-info h3 {
  font-size: 2rem;
  margin-bottom: 20px;
}

.contact-item {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.1rem;
}

.contact-item i {
  font-size: 1.5rem;
  color: var(--color-primary);
  margin-right: 15px;
}

.contact-form {
  background-color: var(--color-light);
  padding: 30px;
  border-radius: 8px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid var(--color-gray-300);
  border-radius: 4px;
  font-family: inherit;
  font-size: 1rem;
}

.form-group textarea {
  height: 120px;
  resize: vertical;
}

footer {
  background-color: var(--color-dark-light);
  color: var(--color-gray-300);
  text-align: center;
  padding: 20px 0;
  border-top: 1px solid rgba(255,255,255,0.1);
}

/* --- WhatsApp Sticky Button --- */
.whatsapp-sticky {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background-color: #25D366;
  color: white;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  box-shadow: 0 4px 10px rgba(0,0,0,0.3);
  z-index: 1000;
  transition: var(--transition);
}

.whatsapp-sticky:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 14px rgba(0,0,0,0.4);
}

/* --- Responsive --- */
@media (max-width: 992px) {
  .hero-title { font-size: 2.8rem; }
  .about-content { flex-direction: column; }
  .products-content { grid-template-columns: 1fr; }
  .contact-container { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 100px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 100px);
    background-color: var(--color-light);
    flex-direction: column;
    align-items: center;
    padding-top: 50px;
    transition: var(--transition);
  }
  
  .nav-links.active {
    left: 0;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .hero-title { font-size: 2.2rem; }
  .hero-buttons { flex-direction: column; }
  .btn { width: 100%; }
}

/* --- Visual Upgrade --- */
:root {
  --color-accent: #F2B441;
}

html {
  scroll-padding-top: 110px;
}

body {
  overflow-x: hidden;
}

.section-heading {
  max-width: 820px;
  margin: 0 auto 42px;
  text-align: center;
}

.section-heading .section-title {
  margin-bottom: 24px;
}

.section-heading p {
  color: var(--color-text-muted);
  font-size: 1.1rem;
}

.section-kicker {
  display: inline-flex;
  color: var(--color-primary);
  font-weight: 800;
  margin-bottom: 12px;
}

.nav-links {
  gap: 16px;
}

.nav-links a {
  font-size: 0.94rem;
}

.nav-links a.active {
  color: var(--color-primary);
}

.nav-cta {
  padding: 10px 16px;
  white-space: nowrap;
}

.hero {
  min-height: 760px;
}

.hero-bg {
  animation: heroZoom 18s ease-in-out infinite alternate;
}

.hero::after {
  background:
    linear-gradient(to right, rgba(20, 20, 20, 0.94) 0%, rgba(33, 33, 33, 0.68) 48%, rgba(33, 33, 33, 0.34) 100%),
    linear-gradient(to top, rgba(0, 0, 0, 0.5), transparent 42%);
}

.hero-content {
  max-width: 660px;
  animation: fadeUp 0.8s ease both;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  margin-bottom: 18px;
  border: 1px solid rgba(255,255,255,0.22);
  border-radius: 999px;
  background-color: rgba(255,255,255,0.1);
  color: var(--color-gray-200);
  font-weight: 700;
}

.hero-buttons {
  flex-wrap: wrap;
}

.hero-outline {
  color: var(--color-light);
  border-color: rgba(255,255,255,0.85);
}

.hero-badges {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.hero-badges span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: 999px;
  background-color: rgba(255,255,255,0.08);
  color: var(--color-gray-100);
  font-weight: 700;
}

.hero-badges i {
  color: var(--color-accent);
}

.trust-strip {
  position: relative;
  z-index: 4;
  margin-top: 0;
  padding: 36px 0 40px;
  background-color: var(--color-gray-100);
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.trust-item {
  background-color: var(--color-light);
  border: 1px solid var(--color-gray-300);
  border-radius: 8px;
  padding: 24px;
  box-shadow: var(--shadow-lg);
}

.trust-item strong {
  display: block;
  color: var(--color-primary);
  font-size: 1.7rem;
  line-height: 1.1;
  margin-bottom: 8px;
}

.trust-item span {
  color: var(--color-text-muted);
  font-weight: 600;
}

.audience {
  background-color: var(--color-light);
}

.audience-grid,
.quality-grid,
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.audience-card,
.quality-panel,
.process-step {
  background-color: var(--color-light);
  border: 1px solid var(--color-gray-300);
  border-radius: 8px;
  padding: 26px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.audience-card:hover,
.quality-panel:hover,
.process-step:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.audience-card i,
.quality-panel i {
  width: 46px;
  height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  border-radius: 8px;
  background-color: rgba(211, 47, 47, 0.1);
  color: var(--color-primary);
  font-size: 1.4rem;
}

.audience-card h3,
.quality-panel h3,
.process-step h3 {
  color: var(--color-dark);
  margin-bottom: 10px;
}

.audience-card p,
.quality-panel p,
.process-step p {
  color: var(--color-text-muted);
}

.product-features {
  margin-bottom: 22px;
}

.spec-card {
  background-color: var(--color-light);
  border: 1px solid var(--color-gray-300);
  border-radius: 8px;
  padding: 22px;
  margin-bottom: 22px;
  box-shadow: var(--shadow-sm);
}

.spec-card h4 {
  color: var(--color-dark);
  font-size: 1.25rem;
  margin-bottom: 14px;
}

.spec-table {
  display: grid;
  gap: 10px;
}

.spec-table div {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-gray-200);
}

.spec-table div:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.spec-table span {
  color: var(--color-text-muted);
  font-weight: 600;
}

.spec-table strong {
  color: var(--color-dark);
}

.industrialization {
  text-align: left;
}

.industrialization .section-title {
  text-align: left;
}

.industrialization .section-title::after {
  margin-left: 0;
}

.industrialization-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 44px;
  align-items: center;
}

.industrialization-content {
  max-width: none;
  margin: 0;
}

.brand-card {
  background-color: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.16);
  border-radius: 8px;
  padding: 34px;
  box-shadow: var(--shadow-lg);
}

.brand-card h3 {
  font-size: 1.7rem;
  margin-bottom: 22px;
}

.brand-card li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
  color: var(--color-gray-200);
}

.brand-card li i {
  color: var(--color-accent);
  margin-top: 4px;
}

.quality {
  background-color: var(--color-gray-100);
}

.quality-grid {
  grid-template-columns: repeat(3, 1fr);
}

.region-item {
  transition: var(--transition);
}

.region-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.process {
  background-color: var(--color-light);
}

.process-step {
  position: relative;
  overflow: hidden;
}

.process-step span {
  display: inline-flex;
  color: var(--color-primary);
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.faq-grid details {
  transition: var(--transition);
}

.faq-grid details:hover {
  border-color: rgba(211, 47, 47, 0.35);
  box-shadow: var(--shadow-sm);
}

.contact-container {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  align-items: start;
  gap: 44px;
  max-width: 1000px;
  margin: 0 auto;
  text-align: left;
}

.contact-item {
  justify-content: flex-start;
}

.contact-form {
  box-shadow: var(--shadow-lg);
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

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

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes heroZoom {
  from {
    transform: scale(1);
  }
  to {
    transform: scale(1.04);
  }
}

@media (max-width: 992px) {
  .trust-grid,
  .audience-grid,
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .quality-grid,
  .industrialization-grid,
  .contact-container {
    grid-template-columns: 1fr;
  }

  .industrialization,
  .industrialization .section-title {
    text-align: center;
  }

  .industrialization .section-title::after {
    margin-left: auto;
  }
}

@media (max-width: 1100px) {
  .nav-links {
    position: fixed;
    top: 100px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 100px);
    background-color: var(--color-light);
    flex-direction: column;
    align-items: center;
    padding: 36px 24px 0;
    gap: 18px;
    transition: var(--transition);
  }

  .nav-links.active {
    left: 0;
  }

  .mobile-menu-btn {
    display: block;
  }
}

@media (max-width: 768px) {
  .nav-links {
    padding: 36px 24px 0;
    gap: 18px;
  }

  .hero {
    min-height: 760px;
  }

  .hero-badges,
  .trust-grid,
  .audience-grid,
  .quality-grid,
  .process-grid {
    grid-template-columns: 1fr;
  }

  .trust-strip {
    margin-top: 0;
    padding-top: 24px;
  }

  .product-features {
    grid-template-columns: 1fr;
  }

  .spec-table div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .contact-container {
    text-align: center;
  }

  .contact-item {
    justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .hero-bg,
  .hero-content,
  .reveal {
    animation: none;
    transition: none;
  }
}