/* ============================================
   SELLVEN - Premium Industrial Landing Page
   Design System & Styles
   ============================================ */

/* --- Google Fonts Import --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Outfit:wght@400;500;600;700;800;900&display=swap');

/* --- CSS Custom Properties --- */
:root {
  /* Primary Palette */
  --orange-50: #FFF7ED;
  --orange-100: #FFEDD5;
  --orange-200: #FED7AA;
  --orange-300: #FDBA74;
  --orange-400: #FB923C;
  --orange-500: #F97316;
  --orange-600: #EA580C;
  --orange-700: #C2410C;
  --orange-800: #9A3412;
  --orange-900: #7C2D12;

  /* Neutrals */
  --white: #FFFFFF;
  --gray-50: #FAFAFA;
  --gray-100: #F4F4F5;
  --gray-200: #E4E4E7;
  --gray-300: #D4D4D8;
  --gray-400: #A1A1AA;
  --gray-500: #71717A;
  --gray-600: #52525B;
  --gray-700: #3F3F46;
  --gray-800: #27272A;
  --gray-900: #18181B;
  --dark: #0C0C0E;

  /* Semantic */
  --primary: var(--orange-500);
  --primary-hover: var(--orange-600);
  --primary-light: var(--orange-100);
  --bg-dark: #0F1114;
  --bg-dark-card: #1A1D23;
  --bg-dark-card-hover: #22262E;
  --text-primary: var(--gray-900);
  --text-secondary: var(--gray-600);
  --text-on-dark: var(--gray-100);
  --text-muted-dark: var(--gray-400);

  /* Typography */
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Spacing */
  --section-padding: 120px 0;
  --container-max: 1280px;
  --container-padding: 0 40px;

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.8s cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
  --shadow-orange: 0 8px 30px rgba(249,115,22,0.25);

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  color: var(--text-primary);
  background-color: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}

/* --- Container --- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--container-padding);
}

/* --- Typography --- */
.section-label {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 16px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.section-label::before {
  content: '';
  display: inline-block;
  width: 32px;
  height: 2px;
  background: var(--primary);
}

.section-label:has(.label-logo)::before {
  display: none;
}

.label-logo {
  width: 22px;
  height: 22px;
  object-fit: contain;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.8;
}

.dark-section .section-label {
  color: var(--orange-400);
}

.dark-section .section-title {
  color: var(--white);
}

.dark-section .section-subtitle {
  color: var(--text-muted-dark);
}

/* --- Scroll Animations --- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.reveal-left {
  opacity: 0;
  transform: translateX(-60px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-left.active {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(60px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-right.active {
  opacity: 1;
  transform: translateX(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-scale.active {
  opacity: 1;
  transform: scale(1);
}

.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }
.stagger-5 { transition-delay: 0.5s; }

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 20px 0;
  transition: all var(--transition-base);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 1px 20px rgba(0, 0, 0, 0.06);
  padding: 12px 0;
  border-bottom: 1px solid rgba(0,0,0,0.04);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-logo img {
  height: 42px;
  width: auto;
  transition: var(--transition-base);
}

.navbar.scrolled .nav-logo img {
  height: 36px;
}

.nav-logo-text {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.02em;
  transition: color var(--transition-base);
}

.navbar.scrolled .nav-logo-text {
  color: var(--gray-900);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.85);
  position: relative;
  padding: 4px 0;
  transition: color var(--transition-fast);
}

.navbar.scrolled .nav-links a {
  color: var(--gray-600);
}

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

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width var(--transition-base);
  border-radius: 2px;
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-cta {
  background: var(--primary) !important;
  color: var(--white) !important;
  padding: 10px 24px !important;
  border-radius: 50px !important;
  font-weight: 600 !important;
  transition: all var(--transition-base) !important;
}

.nav-cta:hover {
  background: var(--primary-hover) !important;
  box-shadow: var(--shadow-orange) !important;
  transform: translateY(-1px);
}

.nav-cta::after {
  display: none !important;
}

/* Mobile Menu */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.navbar.scrolled .nav-toggle span {
  background: var(--gray-900);
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--bg-dark);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    rgba(12, 12, 14, 0.92) 0%,
    rgba(12, 12, 14, 0.7) 50%,
    rgba(12, 12, 14, 0.5) 100%
  );
  z-index: 2;
}

.hero-particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 3;
  pointer-events: none;
}

.particle {
  position: absolute;
  width: 3px;
  height: 3px;
  background: var(--orange-400);
  border-radius: 50%;
  opacity: 0;
  animation: particleFloat 8s infinite;
}

.particle:nth-child(1) { left: 10%; top: 20%; animation-delay: 0s; animation-duration: 7s; }
.particle:nth-child(2) { left: 25%; top: 60%; animation-delay: 1.5s; animation-duration: 9s; }
.particle:nth-child(3) { left: 50%; top: 30%; animation-delay: 3s; animation-duration: 6s; }
.particle:nth-child(4) { left: 70%; top: 70%; animation-delay: 0.8s; animation-duration: 10s; }
.particle:nth-child(5) { left: 85%; top: 40%; animation-delay: 2.2s; animation-duration: 8s; }
.particle:nth-child(6) { left: 40%; top: 80%; animation-delay: 4s; animation-duration: 7.5s; }
.particle:nth-child(7) { left: 60%; top: 15%; animation-delay: 1s; animation-duration: 9.5s; }
.particle:nth-child(8) { left: 15%; top: 45%; animation-delay: 3.5s; animation-duration: 6.5s; }

@keyframes particleFloat {
  0% { opacity: 0; transform: translateY(0) scale(1); }
  15% { opacity: 0.6; }
  50% { opacity: 0.3; transform: translateY(-80px) scale(1.5); }
  85% { opacity: 0.6; }
  100% { opacity: 0; transform: translateY(-160px) scale(0.5); }
}

.hero .container {
  position: relative;
  z-index: 4;
}

.hero-content {
  max-width: 720px;
}

.hero-brand-badge {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-brand-badge .brand-logo-icon {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.hero-brand-badge span {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: 2px;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  font-weight: 900;
  color: var(--white);
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

.hero-title .highlight {
  background: linear-gradient(135deg, var(--orange-400) 0%, var(--orange-600) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 1.15rem;
  color: var(--gray-400);
  max-width: 560px;
  line-height: 1.8;
  margin-bottom: 40px;
  animation: fadeInUp 0.8s ease-out 0.6s both;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease-out 0.8s both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 32px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--orange-500), var(--orange-600));
  color: var(--white);
  box-shadow: 0 4px 20px rgba(249, 115, 22, 0.3);
}

.btn-primary:hover {
  box-shadow: 0 8px 35px rgba(249, 115, 22, 0.45);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 1.5px solid rgba(255, 255, 255, 0.25);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(249, 115, 22, 0.06);
}

/* Hero Stats */
.hero-stats {
  display: flex;
  gap: 48px;
  margin-top: 72px;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  animation: fadeInUp 0.8s ease-out 1s both;
}

.hero-stat-item {
  text-align: left;
}

.hero-stat-number {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1;
  margin-bottom: 6px;
}

.hero-stat-number .counter-suffix {
  color: var(--orange-400);
}

.hero-stat-label {
  font-size: 0.85rem;
  color: var(--gray-500);
  font-weight: 500;
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about {
  padding: var(--section-padding);
  background: var(--white);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-image-wrapper {
  position: relative;
}

.about-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  aspect-ratio: 4/3;
}

.about-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.about-image:hover img {
  transform: scale(1.03);
}

.about-accent {
  position: absolute;
  bottom: -20px;
  right: -20px;
  width: 200px;
  height: 200px;
  background: linear-gradient(135deg, var(--orange-100), var(--orange-200));
  border-radius: var(--radius-lg);
  z-index: -1;
}

.about-content .section-subtitle {
  margin-bottom: 32px;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 32px;
}

.about-feature {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.about-feature:hover {
  background: var(--gray-50);
}

.about-feature-icon {
  width: 40px;
  height: 40px;
  min-width: 40px;
  border-radius: var(--radius-sm);
  background: var(--orange-50);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 1rem;
}

.about-feature h4 {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.about-feature p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ============================================
   MISSION & VISION SECTION
   ============================================ */
.mission-vision {
  padding: var(--section-padding);
  background: var(--bg-dark);
  position: relative;
  overflow: hidden;
}

.mission-vision::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(249, 115, 22, 0.06) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.mv-header {
  text-align: center;
  margin-bottom: 64px;
}

.mv-header .section-subtitle {
  margin: 0 auto;
}

.mv-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.mv-card {
  padding: 48px;
  background: var(--bg-dark-card);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.mv-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--orange-500), var(--orange-700));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-smooth);
}

.mv-card:hover {
  background: var(--bg-dark-card-hover);
  border-color: rgba(249, 115, 22, 0.15);
  transform: translateY(-4px);
}

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

.mv-card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: rgba(249, 115, 22, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 28px;
  font-size: 1.4rem;
  color: var(--orange-400);
}

.mv-card h3 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 16px;
}

.mv-card p {
  color: var(--gray-400);
  line-height: 1.8;
  font-size: 1rem;
}

/* ============================================
   SERVICES SECTION
   ============================================ */
.services {
  padding: var(--section-padding);
  background: var(--gray-50);
}

.services-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 64px;
  gap: 40px;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.service-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-100);
  transition: all var(--transition-smooth);
  position: relative;
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--orange-200);
}

.service-card-image {
  aspect-ratio: 16/10;
  overflow: hidden;
  position: relative;
}

.service-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.service-card:hover .service-card-image img {
  transform: scale(1.06);
}

.service-card-image .service-icon-overlay {
  position: absolute;
  bottom: 16px;
  left: 16px;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 1.1rem;
  box-shadow: var(--shadow-orange);
}

.service-card-body {
  padding: 28px;
}

.service-card-body h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--gray-900);
}

.service-card-body p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.service-card-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--primary);
  transition: gap var(--transition-base);
}

.service-card-link:hover {
  gap: 12px;
}

/* ============================================
   MECHANICAL SEALS SERVICES
   ============================================ */
.seal-services {
  padding: var(--section-padding);
  background: var(--bg-dark);
  position: relative;
  overflow: hidden;
}

.seal-services::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(249, 115, 22, 0.05) 0%, transparent 70%);
  pointer-events: none;
}

.seal-header {
  text-align: center;
  margin-bottom: 72px;
}

.seal-header .section-subtitle {
  margin: 0 auto;
}

.seal-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  position: relative;
  z-index: 2;
}

.seal-card {
  text-align: center;
  padding: 48px 36px;
  background: var(--bg-dark-card);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: all var(--transition-smooth);
  position: relative;
}

.seal-card:hover {
  transform: translateY(-6px);
  background: var(--bg-dark-card-hover);
  border-color: rgba(249, 115, 22, 0.2);
}

.seal-card-image {
  width: 100%;
  aspect-ratio: 16/10;
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 28px;
}

.seal-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.seal-card:hover .seal-card-image img {
  transform: scale(1.05);
}

.seal-card-number {
  font-family: var(--font-heading);
  font-size: 3.5rem;
  font-weight: 900;
  color: rgba(249, 115, 22, 0.1);
  position: absolute;
  top: 16px;
  right: 24px;
  line-height: 1;
}

.seal-card h3 {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 14px;
}

.seal-card p {
  font-size: 0.9rem;
  color: var(--gray-400);
  line-height: 1.7;
}

/* ============================================
   STRATEGIC STOCK SECTION
   ============================================ */
.stock {
  padding: var(--section-padding);
  background: var(--white);
}

.stock-header {
  text-align: center;
  margin-bottom: 72px;
}

.stock-header .section-subtitle {
  margin: 0 auto;
}

.stock-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.stock-card {
  background: var(--gray-50);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--gray-100);
  transition: all var(--transition-smooth);
}

.stock-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--orange-200);
}

.stock-card-image {
  aspect-ratio: 4/3;
  overflow: hidden;
}

.stock-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.stock-card:hover .stock-card-image img {
  transform: scale(1.05);
}

.stock-card-body {
  padding: 24px;
}

.stock-card-body h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--gray-900);
}

.stock-card-body p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================
   CLIENTS SECTION
   ============================================ */
.clients {
  padding: var(--section-padding);
  background: var(--gray-50);
}

.clients-header {
  text-align: center;
  margin-bottom: 64px;
}

.clients-header .section-subtitle {
  margin: 0 auto;
}

.clients-logo-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.client-logo-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--gray-100);
  transition: all var(--transition-base);
  min-height: 100px;
}

.client-logo-card:hover {
  border-color: var(--orange-200);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.client-logo-card img {
  max-height: 50px;
  max-width: 120px;
  object-fit: contain;
  filter: grayscale(100%) opacity(0.5);
  transition: all var(--transition-base);
}

.client-logo-card:hover img {
  filter: grayscale(0%) opacity(1);
}

.clients-cta {
  text-align: center;
  padding-top: 40px;
}

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

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact {
  padding: var(--section-padding);
  background: var(--bg-dark);
  position: relative;
  overflow: hidden;
}

.contact::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 40%;
  height: 100%;
  background: linear-gradient(135deg, rgba(249, 115, 22, 0.03), transparent);
  pointer-events: none;
}

.contact-header {
  text-align: center;
  margin-bottom: 72px;
}

.contact-header .section-subtitle {
  margin: 0 auto;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  position: relative;
  z-index: 2;
}

.contact-info-cards {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-info-card {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 28px;
  background: var(--bg-dark-card);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: all var(--transition-base);
}

.contact-info-card:hover {
  border-color: rgba(249, 115, 22, 0.15);
  background: var(--bg-dark-card-hover);
}

.contact-info-icon {
  width: 48px;
  height: 48px;
  min-width: 48px;
  border-radius: var(--radius-sm);
  background: rgba(249, 115, 22, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--orange-400);
  font-size: 1.1rem;
}

.contact-info-text h4 {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 6px;
}

.contact-info-text p {
  font-size: 0.9rem;
  color: var(--gray-400);
  line-height: 1.6;
}

.contact-info-text a {
  color: var(--orange-400);
  transition: color var(--transition-fast);
}

.contact-info-text a:hover {
  color: var(--orange-300);
}

/* Contact Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  position: relative;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 16px 20px;
  background: var(--bg-dark-card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: all var(--transition-fast);
  outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--gray-500);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--orange-500);
  background: rgba(249, 115, 22, 0.03);
  box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.1);
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.contact-form .btn-primary {
  align-self: flex-start;
  padding: 16px 40px;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: #08090B;
  padding: 64px 0 0;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-brand p {
  color: var(--gray-500);
  font-size: 0.9rem;
  margin-top: 16px;
  line-height: 1.7;
  max-width: 300px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-logo img {
  height: 36px;
}

.footer-logo-text {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--white);
}

.footer-social {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}

.footer-social a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gray-400);
  font-size: 1rem;
  transition: all var(--transition-base);
}

.footer-social a:hover {
  background: var(--primary);
  color: var(--white);
  transform: translateY(-2px);
}

.footer-column h4 {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 20px;
}

.footer-column a {
  display: block;
  color: var(--gray-500);
  font-size: 0.88rem;
  padding: 6px 0;
  transition: all var(--transition-fast);
}

.footer-column a:hover {
  color: var(--orange-400);
  transform: translateX(4px);
}

.footer-bottom {
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-bottom p {
  color: var(--gray-600);
  font-size: 0.82rem;
}

/* ============================================
   SCROLL PROGRESS BAR
   ============================================ */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--orange-500), var(--orange-400));
  z-index: 9999;
  transition: width 0.1s linear;
}

/* ============================================
   BACK TO TOP BUTTON
   ============================================ */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
  border: none;
  box-shadow: var(--shadow-orange);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(249, 115, 22, 0.4);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
  :root {
    --section-padding: 80px 0;
    --container-padding: 0 28px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .about-image-wrapper {
    order: -1;
  }

  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .seal-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .seal-grid .seal-card:last-child {
    grid-column: 1 / -1;
    max-width: 50%;
    justify-self: center;
  }

  .stock-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 64px 0;
    --container-padding: 0 20px;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 360px;
    height: 100vh;
    background: rgba(15, 17, 20, 0.98);
    backdrop-filter: blur(30px);
    flex-direction: column;
    justify-content: center;
    gap: 28px;
    transition: right var(--transition-smooth);
    padding: 40px;
  }

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

  .nav-links a {
    font-size: 1.2rem;
    color: var(--white) !important;
  }

  .nav-toggle {
    display: flex;
  }

  .hero-title {
    font-size: clamp(2.2rem, 8vw, 3rem);
  }

  .hero-stats {
    flex-direction: column;
    gap: 24px;
  }

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

  .services-header {
    flex-direction: column;
    align-items: flex-start;
  }

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

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

  .seal-grid .seal-card:last-child {
    max-width: 100%;
  }

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

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

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

  .clients-logo-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

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

@media (max-width: 480px) {
  .hero-buttons {
    flex-direction: column;
  }

  .hero-buttons .btn {
    justify-content: center;
  }
}

/* ============================================
   LOADING ANIMATION
   ============================================ */
.page-loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-dark);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}

.page-loader.hidden {
  opacity: 0;
  visibility: hidden;
}

.loader-content {
  text-align: center;
}

.loader-logo-img {
  width: 80px;
  height: 80px;
  object-fit: contain;
  margin: 0 auto 20px;
  animation: logoPulse 1.8s infinite ease-in-out;
}

.loader-logo {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--white);
  margin-bottom: 24px;
}

.loader-logo span {
  color: var(--orange-500);
}

@keyframes logoPulse {
  0%, 100% {
    transform: scale(1);
    opacity: 0.8;
  }
  50% {
    transform: scale(1.08);
    opacity: 1;
  }
}

.loader-bar {
  width: 200px;
  height: 3px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  overflow: hidden;
  margin: 0 auto;
}

.loader-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--orange-500), var(--orange-400));
  border-radius: 10px;
  animation: loaderFill 1.5s ease-in-out forwards;
}

@keyframes loaderFill {
  0% { width: 0; }
  100% { width: 100%; }
}