/* ==========================================================================
   FRP MARINE & INDUSTRIAL SOLUTIONS — PREMIUM DESIGN SYSTEM (CSS)
   Engineered Composites • Marine • Industrial • Fabrication • Andhra Pradesh
   ========================================================================== */

:root {
  /* Color Palette - Premium Navy, Amber Gold & Coastal Emerald */
  --primary: #052636;
  --primary-dark: #021620;
  --primary-light: #0d5471;
  --primary-gradient: linear-gradient(135deg, #052636 0%, #0d5471 100%);
  --secondary: #e58b2a;
  --secondary-hover: #cf781d;
  --secondary-gradient: linear-gradient(135deg, #e58b2a 0%, #f4a242 100%);
  --accent: #17b897;
  --accent-dark: #0f8a70;
  --accent-light: #e8f9f6;
  --gold: #d4af37;
  --gold-light: #faf5e6;
  
  /* Neutrals & Surfaces */
  --text-main: #14242d;
  --text-muted: #536974;
  --text-light: #8ba0ab;
  --surface: #ffffff;
  --surface-alt: #f3f7f9;
  --surface-card: #ffffff;
  --border: #d3e1e6;
  --border-light: #e6f0f3;
  --border-focus: #17b897;
  --dark-surface: #031822;
  --dark-surface-card: #072535;
  --dark-surface-border: #123d54;
  
  /* Glassmorphism & Micro-Elevations */
  --glass-bg: rgba(255, 255, 255, 0.88);
  --glass-border: rgba(255, 255, 255, 0.6);
  --glass-dark-bg: rgba(5, 38, 54, 0.85);
  --glass-dark-border: rgba(63, 195, 177, 0.2);
  
  /* Shadows & Depth */
  --shadow-xs: 0 1px 3px rgba(5, 38, 54, 0.04);
  --shadow-sm: 0 4px 12px rgba(5, 38, 54, 0.06);
  --shadow-md: 0 12px 32px rgba(5, 38, 54, 0.09);
  --shadow-lg: 0 24px 60px rgba(5, 38, 54, 0.14);
  --shadow-glow: 0 0 25px rgba(23, 184, 151, 0.25);
  --shadow-gold: 0 0 25px rgba(229, 139, 42, 0.25);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --radius-pill: 9999px;
  
  /* Layout & Fonts */
  --container-width: 1240px;
  --font-main: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-heading: "Manrope", "Inter", sans-serif;
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-main);
  background-color: var(--surface);
  overflow-x: hidden;
}

body.menu-open {
  overflow: hidden;
}

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

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

a:hover {
  color: var(--secondary);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--primary);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.025em;
  margin-bottom: 0.8rem;
}

h1 { font-size: clamp(2.3rem, 4.5vw, 3.8rem); line-height: 1.15; }
h2 { font-size: clamp(1.8rem, 3vw, 2.7rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.6rem); }
h4 { font-size: 1.15rem; }

p {
  margin-bottom: 1.2rem;
}

ul, ol {
  list-style: none;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

/* Layout Utilities */
.container {
  width: min(var(--container-width), calc(100% - 40px));
  margin-inline: auto;
}

.section-padding {
  padding: 85px 0;
}

.section-padding-sm {
  padding: 50px 0;
}

.bg-light {
  background-color: var(--surface-alt);
}

.bg-dark {
  background-color: var(--dark-surface);
  color: #e2eff2;
}

.bg-dark h1, .bg-dark h2, .bg-dark h3, .bg-dark h4 {
  color: #ffffff;
}

.bg-dark p {
  color: #b8ced4;
}

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

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

/* Section Headers */
.section-heading {
  max-width: 760px;
  margin-bottom: 45px;
}

.section-heading.center {
  margin-inline: auto;
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--primary-light);
  margin-bottom: 12px;
}

.eyebrow::before {
  content: "";
  display: inline-block;
  width: 24px;
  height: 2px;
  background-color: var(--secondary);
}

.section-heading.center .eyebrow {
  justify-content: center;
}

.lead {
  font-size: 1.12rem;
  color: var(--text-muted);
  line-height: 1.65;
}

.bg-dark .eyebrow {
  color: var(--accent);
}

.bg-dark .lead {
  color: #c2d8dc;
}

/* Button Component System */
.btn, .btn-primary, .btn-secondary, .btn-outline, .btn-white {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.88rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  transition: all var(--transition-fast);
  text-align: center;
  white-space: nowrap;
}

.btn, .btn-primary {
  background-color: var(--secondary);
  color: #ffffff;
  border: 1px solid var(--secondary);
  box-shadow: 0 4px 14px rgba(229, 139, 42, 0.28);
}

.btn:hover, .btn-primary:hover {
  background-color: var(--secondary-hover);
  border-color: var(--secondary-hover);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(229, 139, 42, 0.35);
}

.btn-secondary {
  background-color: var(--primary);
  color: #ffffff;
  border: 1px solid var(--primary);
}

.btn-secondary:hover {
  background-color: var(--primary-light);
  border-color: var(--primary-light);
  color: #ffffff;
  transform: translateY(-2px);
}

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

.btn-outline:hover {
  background-color: var(--primary);
  color: #ffffff;
  transform: translateY(-2px);
}

.btn-white {
  background-color: #ffffff;
  color: var(--primary);
  border: 1px solid #ffffff;
}

.btn-white:hover {
  background-color: var(--surface-alt);
  color: var(--primary-dark);
  transform: translateY(-2px);
}

.bg-dark .btn-outline {
  border-color: rgba(255, 255, 255, 0.6);
  color: #ffffff;
}

.bg-dark .btn-outline:hover {
  border-color: #ffffff;
  background-color: #ffffff;
  color: var(--primary-dark);
}

.btn-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--primary);
  transition: gap var(--transition-fast);
}

.btn-link:hover {
  color: var(--secondary);
  gap: 12px;
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 25px;
}

/* Navigation & Header */
.official-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.98);
  border-bottom: 1px solid var(--border-light);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all var(--transition-fast);
}

.official-header.is-scrolled {
  box-shadow: 0 8px 30px rgba(7, 54, 74, 0.12);
  border-bottom-color: rgba(7, 54, 74, 0.1);
}

.top-bar {
  background: linear-gradient(90deg, #03202c 0%, #07364a 100%);
  color: #d1e2e6;
  font-size: 0.82rem;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

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

.top-bar-location {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.contact-info {
  display: flex;
  align-items: center;
  gap: 22px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.contact-item i {
  color: var(--secondary);
}

.contact-item a {
  color: #d1e2e6;
  font-weight: 500;
}

.contact-item a:hover {
  color: #ffffff;
}

.main-navigation {
  padding: 12px 0;
}

.main-navigation .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo-container a {
  display: flex;
  align-items: center;
  gap: 16px;
  color: var(--primary);
  text-decoration: none;
}

.logo {
  width: 64px;
  height: 64px;
  min-width: 64px;
  object-fit: contain;
  filter: drop-shadow(0 3px 10px rgba(7, 54, 74, 0.18));
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.logo-container a:hover .logo {
  transform: scale(1.06);
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.company-name {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.25rem;
  line-height: 1.12;
  color: var(--primary);
  letter-spacing: -0.025em;
}

.tagline {
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 3px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.tagline::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 2px;
  background-color: var(--secondary);
  border-radius: 2px;
}

.official-nav {
  margin-left: auto;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 8px 12px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--secondary);
  background-color: rgba(7, 54, 74, 0.04);
}

.nav-item.dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 250px;
  background-color: #ffffff;
  border-radius: var(--radius);
  box-shadow: 0 12px 35px rgba(7, 54, 74, 0.15);
  border: 1px solid var(--border-light);
  padding: 10px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 1001;
}

.dropdown-menu a {
  display: block;
  padding: 9px 14px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.dropdown-menu a:hover {
  background-color: var(--surface-alt);
  color: var(--secondary);
  padding-left: 18px;
}

.nav-item.cta .nav-link {
  background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-hover) 100%);
  color: #ffffff;
  margin-left: 10px;
  padding: 10px 18px;
  font-weight: 700;
  box-shadow: 0 4px 15px rgba(229, 139, 42, 0.28);
}

.nav-item.cta .nav-link:hover {
  background: linear-gradient(135deg, var(--secondary-hover) 0%, #c46810 100%);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(229, 139, 42, 0.38);
}

.mobile-menu-btn {
  display: none;
  width: 46px;
  height: 46px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: #ffffff;
  padding: 8px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--primary);
  margin: 6px auto;
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.hamburger.active span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* Breadcrumbs */
.breadcrumbs {
  background-color: var(--surface-alt);
  padding: 12px 0;
  border-bottom: 1px solid var(--border-light);
  font-size: 0.82rem;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.breadcrumb li:not(:last-child)::after {
  content: "/";
  margin-left: 8px;
  color: var(--text-light);
}

.breadcrumb a {
  color: var(--text-muted);
}

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

.breadcrumb [aria-current="page"] {
  color: var(--primary);
  font-weight: 700;
}

/* ==========================================================================
   ULTRA-PREMIUM HERO SECTION
   ========================================================================== */
.hero {
  position: relative;
  min-height: 760px;
  display: flex;
  align-items: center;
  background: radial-gradient(circle at 80% 20%, rgba(63, 195, 177, 0.15) 0%, transparent 45%),
              radial-gradient(circle at 10% 80%, rgba(229, 139, 42, 0.12) 0%, transparent 40%),
              linear-gradient(135deg, #021a24 0%, #062f40 50%, #0a445c 100%);
  color: #ffffff;
  overflow: hidden;
  padding: 70px 0 60px 0;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("WhatsApp Image 2025-06-20 at 11.00.40 (1).jpeg") center/cover no-repeat;
  opacity: 0.12;
  mix-blend-mode: luminosity;
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 50px;
  position: relative;
  z-index: 2;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(63, 195, 177, 0.35);
  border-radius: 50px;
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.hero-pill .pill-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

.hero h1 {
  color: #ffffff;
  font-size: clamp(2.4rem, 4.2vw, 3.6rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.03em;
  margin-bottom: 22px;
  text-shadow: 0 3px 15px rgba(0, 0, 0, 0.35);
}

.hero-highlight {
  background: linear-gradient(135deg, #ffffff 0%, #3fc3b7 50%, #e58b2a 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline;
}

.hero p {
  font-size: clamp(1.05rem, 1.6vw, 1.22rem);
  line-height: 1.65;
  color: #cbe0e5;
  margin-bottom: 32px;
  max-width: 640px;
}

.hero-btn-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-bottom: 35px;
}

.btn-hero-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 28px;
  background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-hover) 100%);
  color: #ffffff;
  font-weight: 800;
  font-size: 1.02rem;
  border-radius: var(--radius);
  box-shadow: 0 8px 25px rgba(229, 139, 42, 0.4);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-hero-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(229, 139, 42, 0.55);
  color: #ffffff;
}

.btn-hero-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 24px;
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
  font-weight: 700;
  font-size: 0.98rem;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all 0.25s ease;
}

.btn-hero-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: #ffffff;
  color: #ffffff;
  transform: translateY(-3px);
}

.btn-hero-whatsapp {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 15px 20px;
  background: #25d366;
  color: #ffffff;
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: var(--radius);
  box-shadow: 0 6px 20px rgba(37, 211, 102, 0.3);
  transition: all 0.25s ease;
}

.btn-hero-whatsapp:hover {
  background: #1eb956;
  color: #ffffff;
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(37, 211, 102, 0.45);
}

.hero-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.hero-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 0.86rem;
  font-weight: 600;
  color: #d1e8ed;
}

.hero-chip i {
  color: var(--accent);
  font-size: 0.95rem;
}

/* Hero Visual Showcase Side */
.hero-visual-wrapper {
  position: relative;
  perspective: 1000px;
}

.hero-card-main {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.45),
              0 0 0 1px rgba(255, 255, 255, 0.15);
  background: #07364a;
  transform: rotateY(-3deg) rotateX(2deg);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.hero-card-main:hover {
  transform: rotateY(0deg) rotateX(0deg);
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.55),
              0 0 0 1px rgba(63, 195, 177, 0.4);
}

.hero-card-main img {
  width: 100%;
  height: 460px;
  object-fit: cover;
  display: block;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.hero-card-main:hover img {
  transform: scale(1.04);
}

.hero-card-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 30px 24px 20px 24px;
  background: linear-gradient(to top, rgba(3, 26, 36, 0.95) 0%, rgba(3, 26, 36, 0.6) 60%, transparent 100%);
  color: #ffffff;
}

.hero-card-overlay h3 {
  color: #ffffff;
  font-size: 1.25rem;
  margin-bottom: 4px;
}

.hero-card-overlay p {
  color: #c0d8de;
  font-size: 0.88rem;
  margin-bottom: 0;
}

/* Floating Glass Badges */
.floating-hero-card {
  position: absolute;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 18px;
  background: rgba(7, 54, 74, 0.88);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 14px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.35);
  animation: float-badge 4s ease-in-out infinite;
}

@keyframes float-badge {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.floating-hero-card.card-top {
  top: -15px;
  right: -15px;
  animation-delay: 0s;
}

.floating-hero-card.card-bottom {
  bottom: -20px;
  left: -20px;
  animation-delay: 2s;
}

.floating-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(63, 195, 177, 0.2);
  border: 1px solid rgba(63, 195, 177, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 1.1rem;
}

.floating-icon.gold {
  background: rgba(229, 139, 42, 0.2);
  border-color: rgba(229, 139, 42, 0.4);
  color: var(--secondary);
}

.floating-val {
  font-size: 0.95rem;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.15;
}

.floating-sub {
  font-size: 0.72rem;
  font-weight: 600;
  color: #b5d1d8;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* Page Hero (Subpages) */
.page-hero {
  position: relative;
  min-height: 400px;
  display: flex;
  align-items: center;
  background-color: var(--dark-surface);
  background-position: center;
  background-size: cover;
  color: #ffffff;
  text-align: center;
  padding: 85px 0;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(4, 31, 42, 0.94) 0%, rgba(7, 54, 74, 0.82) 100%);
}

.page-hero .container {
  position: relative;
  max-width: 840px;
}

.page-hero h1 {
  color: #ffffff;
  margin-bottom: 16px;
}

.page-hero p {
  font-size: 1.12rem;
  color: #d2e4e8;
  max-width: 700px;
  margin-inline: auto;
}

.service-facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 15px;
  margin-top: 30px;
  background: rgba(255, 255, 255, 0.08);
  padding: 16px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.15);
  text-align: left;
}

.service-facts strong {
  display: block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 4px;
}

.service-facts span {
  font-size: 0.9rem;
  color: #ffffff;
  font-weight: 600;
}

/* Content Split & Modules */
.split-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(35px, 6vw, 75px);
  align-items: center;
}

.split-content.reverse {
  direction: rtl;
}

.split-content.reverse > * {
  direction: ltr;
}

.split-image {
  position: relative;
}

.split-image img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  object-fit: cover;
}

.split-image::after {
  content: "";
  position: absolute;
  bottom: -15px;
  right: -15px;
  width: 120px;
  height: 120px;
  border-right: 4px solid var(--secondary);
  border-bottom: 4px solid var(--accent);
  border-radius: 0 0 var(--radius-lg) 0;
  pointer-events: none;
}

/* Feature Checklists */
.feature-list, .check-list {
  display: grid;
  gap: 12px;
  margin: 25px 0;
}

.feature-list li, .check-list li {
  position: relative;
  padding-left: 30px;
  font-size: 0.96rem;
  color: var(--text-main);
}

.feature-list li::before, .check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 2px;
  width: 20px;
  height: 20px;
  display: grid;
  place-items: center;
  background-color: var(--accent-light);
  color: var(--accent-dark);
  border-radius: 50%;
  font-size: 0.72rem;
  font-weight: 900;
}

/* Card Systems */
.card, .service-card, .product-card, .industry-card, .tech-card, .location-card, .project-card, .resource-card {
  position: relative;
  background-color: var(--surface-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 30px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.card:hover, .service-card:hover, .product-card:hover, .industry-card:hover, .tech-card:hover, .location-card:hover, .resource-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
}

.card-icon {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-sm);
  background-color: var(--surface-alt);
  color: var(--primary-light);
  display: grid;
  place-items: center;
  font-size: 1.4rem;
  margin-bottom: 22px;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.card:hover .card-icon, .service-card:hover .card-icon {
  background-color: var(--primary);
  color: #ffffff;
}

.card h3, .service-card h3, .product-card h3 {
  font-size: 1.3rem;
  margin-bottom: 12px;
}

.card p, .service-card p, .product-card p {
  color: var(--text-muted);
  font-size: 0.93rem;
  margin-bottom: 20px;
  flex-grow: 1;
}

/* Product Cards with Images */
.product-card {
  padding: 0;
  overflow: hidden;
}

.product-image {
  position: relative;
  height: 220px;
  overflow: hidden;
  background-color: var(--dark-surface);
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

.product-badge {
  position: absolute;
  top: 15px;
  left: 15px;
  background-color: var(--secondary);
  color: #ffffff;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.product-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.product-features {
  display: grid;
  gap: 6px;
  margin-bottom: 20px;
}

.product-features li {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.product-features li i {
  color: var(--accent);
  font-size: 0.8rem;
}

/* Process Timeline & Steps */
.process-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.process-step {
  position: relative;
  background-color: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px 26px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.process-step:hover {
  transform: translateY(-4px);
  border-color: var(--secondary);
  box-shadow: var(--shadow-md);
}

.step-num {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--secondary);
  line-height: 1;
  margin-bottom: 15px;
}

.process-step h3 {
  font-size: 1.2rem;
  margin-bottom: 10px;
}

.process-step p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* Tables & Specifications */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 25px 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  background-color: #ffffff;
  font-size: 0.9rem;
}

.spec-table th, .spec-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-light);
  text-align: left;
}

.spec-table th {
  background-color: var(--surface-alt);
  color: var(--primary);
  font-weight: 700;
  font-family: var(--font-heading);
}

.spec-table tr:last-child td {
  border-bottom: none;
}

.spec-table tr:hover td {
  background-color: #f9fcfd;
}

/* Portfolio & Projects Grid */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 35px;
}

.filter-btn {
  padding: 9px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  background-color: #ffffff;
  color: var(--text-muted);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  transition: all var(--transition-fast);
}

.filter-btn:hover, .filter-btn.active {
  background-color: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.project-card {
  padding: 0;
  overflow: hidden;
  background-color: var(--dark-surface);
  border-radius: var(--radius-md);
}

.project-image {
  position: relative;
  height: 280px;
  overflow: hidden;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.project-card:hover .project-image img {
  transform: scale(1.08);
}

.project-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(3, 27, 37, 0.95) 0%, rgba(3, 27, 37, 0.2) 60%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 24px;
  color: #ffffff;
}

.project-tag {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent);
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}

.project-overlay h3 {
  color: #ffffff;
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.project-overlay p {
  font-size: 0.85rem;
  color: #d1e5e8;
  margin-bottom: 12px;
  line-height: 1.4;
}

/* FAQ Accordion */
.faq-container {
  max-width: 860px;
  margin-inline: auto;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background-color: #ffffff;
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  text-align: left;
  font-weight: 700;
  font-size: 1.02rem;
  color: var(--primary);
  background-color: #ffffff;
}

.faq-question i {
  color: var(--secondary);
  transition: transform var(--transition-fast);
  font-size: 0.9rem;
}

.faq-question.active i {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
  background-color: #ffffff;
}

.faq-answer p {
  padding: 0 22px 20px;
  color: var(--text-muted);
  font-size: 0.94rem;
  margin-bottom: 0;
}

/* Forms & Quotation System */
.form-card {
  background-color: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(24px, 4vw, 44px);
  box-shadow: var(--shadow-md);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

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

.form-group.full {
  grid-column: 1 / -1;
}

.form-group label {
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 7px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background-color: #ffffff;
  color: var(--text-main);
  outline: none;
  transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: var(--shadow-highlight);
}

.form-note {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 14px;
}

/* CTA Callout Sections */
.cta-banner {
  background: linear-gradient(120deg, var(--dark-surface) 0%, var(--primary) 100%);
  color: #ffffff;
  padding: 75px 0;
  text-align: center;
}

.cta-banner h2 {
  color: #ffffff;
  margin-bottom: 16px;
}

.cta-banner p {
  color: #d1e4e8;
  max-width: 680px;
  margin: 0 auto 28px;
  font-size: 1.1rem;
}

.cta-banner .btn-group {
  justify-content: center;
}

/* Andhra Pradesh Local Directory & Map */
.location-search-box {
  max-width: 580px;
  margin: 0 auto 35px;
  position: relative;
}

.location-search-box input {
  width: 100%;
  padding: 14px 20px 14px 45px;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  background-color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.location-search-box i {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-light);
}

.region-tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-bottom: 30px;
}

.region-tab-btn {
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background-color: #ffffff;
  color: var(--text-main);
  font-weight: 700;
  font-size: 0.82rem;
}

.region-tab-btn.active, .region-tab-btn:hover {
  background-color: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

.location-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.location-card {
  padding: 24px;
}

.location-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-dark);
  background-color: var(--accent-light);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  width: fit-content;
}

.location-card h3 {
  font-size: 1.2rem;
  margin-bottom: 8px;
}

.location-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

/* Comparison Calculator Tool */
.calc-card {
  background-color: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 35px;
  box-shadow: var(--shadow-md);
  max-width: 900px;
  margin-inline: auto;
}

.calc-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 25px;
}

.calc-results {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding-top: 25px;
  border-top: 1px solid var(--border);
}

.calc-result-box {
  background-color: var(--surface-alt);
  border-radius: var(--radius-sm);
  padding: 16px;
  text-align: center;
}

.calc-result-box span {
  display: block;
  font-size: 0.76rem;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 700;
  margin-bottom: 6px;
}

.calc-result-box strong {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--primary);
}

/* Footer */
.official-footer {
  background-color: var(--dark-surface);
  color: #b2c9ce;
  font-size: 0.9rem;
}

.footer-top {
  padding: 70px 0 45px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 35px;
}

.footer-col h4 {
  color: #ffffff;
  font-size: 1.1rem;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}

.footer-col h4::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 30px;
  height: 2px;
  background-color: var(--secondary);
}

.footer-about p {
  color: #a4bfc5;
  font-size: 0.88rem;
  line-height: 1.6;
  margin-bottom: 20px;
}

.footer-links li {
  margin-bottom: 9px;
}

.footer-links a {
  color: #b2c9ce;
  font-size: 0.88rem;
  transition: all var(--transition-fast);
  display: inline-block;
}

.footer-links a:hover {
  color: var(--accent);
  transform: translateX(4px);
}

.footer-contact-item {
  display: flex;
  gap: 12px;
  margin-bottom: 14px;
  font-size: 0.88rem;
}

.footer-contact-item i {
  color: var(--secondary);
  font-size: 1.05rem;
  margin-top: 4px;
}

.footer-contact-item a {
  color: #b2c9ce;
}

.footer-contact-item a:hover {
  color: #ffffff;
}

.footer-bottom {
  padding: 22px 0;
  text-align: center;
  font-size: 0.82rem;
  color: #8da9af;
}

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

.footer-legal-links {
  display: flex;
  gap: 18px;
}

.footer-legal-links a {
  color: #8da9af;
}

.footer-legal-links a:hover {
  color: #ffffff;
}

/* Floating Actions & Mobile CTA Bar */
.floating-actions {
  position: fixed;
  right: 20px;
  bottom: 24px;
  z-index: 900;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.float-btn {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: #ffffff;
  font-size: 1.3rem;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
  transition: transform var(--transition-fast);
}

.float-btn:hover {
  color: #ffffff;
  transform: scale(1.1);
}

.float-btn.whatsapp { background-color: #25d366; }
.float-btn.call { background-color: var(--secondary); }

.back-to-top {
  position: fixed;
  right: 20px;
  bottom: 140px;
  z-index: 900;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background-color: var(--primary);
  color: #ffffff;
  box-shadow: var(--shadow-md);
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-fast);
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
}

.mobile-cta-bar {
  display: none;
}

/* Motion & Accessibility */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   RESPONSIVE BREAKPOINTS
   ========================================================================== */

@media (max-width: 1080px) {
  .nav-link { padding: 8px 8px; font-size: 0.82rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .top-bar { display: none; }
  .mobile-menu-btn { display: block; }
  
  .official-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: #ffffff;
    border-top: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    padding: 16px 20px;
    display: none;
    max-height: calc(100vh - 80px);
    overflow-y: auto;
  }
  
  .official-nav.active {
    display: block;
  }
  
  .nav-menu {
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
  }
  
  .nav-link {
    padding: 12px 14px;
    font-size: 0.94rem;
  }
  
  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    background-color: var(--surface-alt);
    padding-left: 15px;
    margin-top: 4px;
  }
  
  .nav-item.cta .nav-link {
    margin-left: 0;
    margin-top: 10px;
    text-align: center;
  }
  
  .split-content { grid-template-columns: 1fr; }
  .split-content.reverse { direction: ltr; }
  .grid-3, .process-grid, .location-grid, .project-grid { grid-template-columns: repeat(2, 1fr); }
  .calc-grid, .calc-results { grid-template-columns: 1fr; }
  .service-facts { grid-template-columns: 1fr; }

  /* Hero Tablet Breakpoint */
  .hero { min-height: auto; padding: 60px 0 50px 0; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-card-main img { height: 360px; }
  .floating-hero-card.card-top { top: -10px; right: 10px; }
  .floating-hero-card.card-bottom { bottom: -10px; left: 10px; }
}

@media (max-width: 640px) {
  .section-padding { padding: 55px 0; }
  
  h1 { font-size: 2.1rem; }
  h2 { font-size: 1.65rem; }
  
  .btn, .btn-primary, .btn-secondary, .btn-outline { width: 100%; }
  .btn-group { flex-direction: column; }
  
  /* Hero Mobile Breakpoint */
  .hero { padding: 45px 0 40px 0; }
  .hero-pill { font-size: 0.76rem; padding: 6px 14px; }
  .hero h1 { font-size: 1.95rem; }
  .hero p { font-size: 0.98rem; }
  .hero-btn-group { flex-direction: column; width: 100%; }
  .btn-hero-primary, .btn-hero-secondary, .btn-hero-whatsapp { width: 100%; justify-content: center; }
  .hero-chips { flex-direction: column; gap: 8px; }
  .hero-card-main { transform: none; }
  .hero-card-main img { height: 280px; }
  .floating-hero-card { display: none; }
  .logo { width: 50px; height: 50px; min-width: 50px; }
  .company-name { font-size: 1.05rem; }
  
  .grid-2, .grid-3, .grid-4, .process-grid, .location-grid, .project-grid { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom .container { flex-direction: column; gap: 12px; }
  
  .floating-actions { right: 14px; bottom: 74px; }
  .back-to-top { right: 14px; bottom: 180px; }
  
  .mobile-cta-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background-color: #ffffff;
    box-shadow: 0 -4px 18px rgba(7, 54, 74, 0.12);
    z-index: 999;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
  }
  
  .mobile-cta-bar a {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 0.68rem;
    font-weight: 800;
    text-transform: uppercase;
    color: var(--primary);
    border-right: 1px solid var(--border-light);
    gap: 3px;
  }
  
  .mobile-cta-bar a:last-child {
    border-right: none;
    background-color: var(--secondary);
    color: #ffffff;
  }
  
  .mobile-cta-bar a i {
    font-size: 1.1rem;
  }
  
  .mobile-cta-bar a:nth-child(1) i { color: var(--secondary); }
  .mobile-cta-bar a:nth-child(2) i { color: #25d366; }
  .mobile-cta-bar a:last-child i { color: #ffffff; }
}

/* ==========================================================================
   PREMIUM ENGINEERING & TECHNICAL EXTENSIONS
   ========================================================================== */

/* Technical Callouts & Stat Grids */
.tech-callout {
  background: var(--surface-alt);
  border-left: 4px solid var(--accent);
  padding: 24px 28px;
  border-radius: var(--radius-sm);
  margin: 28px 0;
  box-shadow: var(--shadow-sm);
}

.tech-callout.gold {
  border-left-color: var(--secondary);
  background: #fffcf7;
  border: 1px solid #fce8cc;
  border-left: 4px solid var(--secondary);
}

.tech-callout.dark {
  background: var(--dark-surface-card);
  border-color: var(--accent);
  color: #d1e4ec;
  border: 1px solid var(--dark-surface-border);
  border-left: 4px solid var(--accent);
}

.tech-callout.dark h3, .tech-callout.dark h4 {
  color: #ffffff;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin: 40px 0;
}

.stat-card {
  background: var(--surface);
  padding: 26px 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
}

.stat-number {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 3.5vw, 2.7rem);
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 6px;
}

.stat-number span {
  color: var(--secondary);
}

.stat-label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Formula & Calculation Box */
.formula-card {
  background: var(--dark-surface-card);
  color: #ffffff;
  padding: 24px 28px;
  border-radius: var(--radius-md);
  border: 1px solid var(--dark-surface-border);
  margin: 25px 0;
  font-family: "Courier New", Courier, monospace;
}

.formula-card h4 {
  color: var(--accent);
  font-family: var(--font-heading);
  margin-bottom: 10px;
}

.formula-card .math-exp {
  font-size: 1.15rem;
  color: var(--gold);
  padding: 10px 0;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.15);
  margin-bottom: 12px;
}

.formula-card p {
  color: #a9c6d1;
  font-size: 0.88rem;
  font-family: var(--font-main);
  margin-bottom: 0;
}

/* Technical Specification Badges */
.spec-badge-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 15px 0;
}

.spec-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.spec-badge.primary { background: #e8f3f8; border-color: #badbeb; color: var(--primary); }
.spec-badge.accent { background: var(--accent-light); border-color: #a8ebd9; color: var(--accent-dark); }
.spec-badge.gold { background: var(--gold-light); border-color: #f5e4ab; color: #a17812; }

/* In-Depth Article Content Sections */
.deep-content-section {
  margin: 45px 0;
}

.deep-content-section h2 {
  position: relative;
  padding-bottom: 12px;
  margin-bottom: 22px;
}

.deep-content-section h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 50px;
  height: 3px;
  background: var(--secondary);
  border-radius: 2px;
}

.deep-content-section.center h2::after {
  left: 50%;
  transform: translateX(-50%);
}

.deep-content-section h3 {
  color: var(--primary);
  margin-top: 28px;
  margin-bottom: 12px;
}

.deep-content-section p {
  font-size: 1.02rem;
  line-height: 1.8;
  color: var(--text-main);
  margin-bottom: 1.3rem;
}

/* Responsive Stat Grid */
@media (max-width: 900px) {
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .stat-grid { grid-template-columns: 1fr; }
}

/* ==========================================================================
   WIKIPEDIA-GRADE ENCYCLOPEDIC & TECHNICAL KNOWLEDGE SYSTEM (CSS)
   ========================================================================== */

/* 2-Column Encyclopedic Layout */
.wiki-container {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 36px;
  align-items: start;
  margin: 30px 0;
}

.wiki-article {
  min-width: 0;
}

.wiki-sidebar {
  position: sticky;
  top: 95px;
}

/* Wikipedia-Style Encyclopedic Infobox */
.wiki-infobox {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  font-size: 0.88rem;
  margin-bottom: 25px;
}

.wiki-infobox-header {
  background: var(--primary-gradient);
  color: #ffffff;
  padding: 14px 18px;
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  text-align: center;
  border-bottom: 3px solid var(--secondary);
}

.wiki-infobox-header span {
  display: block;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent-light);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 2px;
}

.wiki-infobox-image {
  background: var(--surface-alt);
  padding: 12px;
  text-align: center;
  border-bottom: 1px solid var(--border-light);
}

.wiki-infobox-image img {
  border-radius: var(--radius-sm);
  margin: 0 auto;
  max-height: 200px;
  object-fit: cover;
}

.wiki-infobox-caption {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 6px;
  font-style: italic;
}

.wiki-infobox-section-title {
  background: #edf4f7;
  color: var(--primary);
  font-weight: 700;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 8px 14px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.wiki-infobox-row {
  display: grid;
  grid-template-columns: 125px 1fr;
  padding: 8px 14px;
  border-bottom: 1px solid var(--border-light);
  line-height: 1.45;
}

.wiki-infobox-row:nth-child(even) {
  background: #fbfdfe;
}

.wiki-infobox-label {
  font-weight: 600;
  color: var(--primary);
}

.wiki-infobox-value {
  color: var(--text-main);
  word-break: break-word;
}

/* Wikipedia-Style Table of Contents (TOC) */
.wiki-toc {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-left: 4px solid var(--primary-light);
  border-radius: var(--radius-sm);
  padding: 18px 22px;
  margin: 25px 0 35px 0;
  max-width: 580px;
}

.wiki-toc-title {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.wiki-toc-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.wiki-toc-list li {
  margin-bottom: 6px;
  font-size: 0.88rem;
}

.wiki-toc-list li a {
  color: var(--primary-light);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.wiki-toc-list li a:hover {
  color: var(--secondary);
  text-decoration: underline;
}

.wiki-toc-num {
  font-weight: 700;
  color: var(--secondary);
  font-size: 0.8rem;
}

/* High-Precision Technical Tables */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 25px 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xs);
  background: var(--surface);
}

.wiki-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.88rem;
}

.wiki-table th {
  background: #edf4f7;
  color: var(--primary);
  font-weight: 700;
  padding: 12px 16px;
  border-bottom: 2px solid var(--border);
  font-family: var(--font-heading);
  white-space: nowrap;
}

.wiki-table td {
  padding: 11px 16px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-main);
  vertical-align: middle;
}

.wiki-table tbody tr:nth-child(even) {
  background: #fbfdfe;
}

.wiki-table tbody tr:hover {
  background: #f0f7fa;
}

.wiki-table .tag-pass {
  display: inline-block;
  padding: 3px 8px;
  background: #e8f9f2;
  color: #0f8a5f;
  font-weight: 700;
  font-size: 0.75rem;
  border-radius: 4px;
}

.wiki-table .tag-warn {
  display: inline-block;
  padding: 3px 8px;
  background: #fff8e6;
  color: #b37400;
  font-weight: 700;
  font-size: 0.75rem;
  border-radius: 4px;
}

.wiki-table .tag-fail {
  display: inline-block;
  padding: 3px 8px;
  background: #fde8e8;
  color: #c53030;
  font-weight: 700;
  font-size: 0.75rem;
  border-radius: 4px;
}

/* Encyclopedic Callouts */
.wiki-callout {
  background: #f4fafc;
  border: 1px solid #cbe3eb;
  border-left: 4px solid var(--primary-light);
  border-radius: var(--radius-sm);
  padding: 18px 22px;
  margin: 25px 0;
  font-size: 0.94rem;
  color: var(--text-main);
}

.wiki-callout.accent {
  background: var(--accent-light);
  border-color: #b7eedf;
  border-left-color: var(--accent);
}

.wiki-callout.warning {
  background: #fff9ed;
  border-color: #fae2b6;
  border-left-color: var(--secondary);
}

.wiki-callout-title {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  font-size: 1rem;
}

/* Encyclopedic Comparison Grid */
.wiki-comparison-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin: 30px 0;
}

.wiki-compare-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 22px;
  box-shadow: var(--shadow-xs);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.wiki-compare-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.wiki-compare-card.highlight {
  border-color: var(--accent);
  border-width: 2px;
  background: #fafffe;
}

.wiki-compare-card h4 {
  color: var(--primary);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.wiki-compare-card .compare-badge {
  font-size: 0.72rem;
  padding: 3px 8px;
  border-radius: var(--radius-pill);
  font-weight: 700;
  text-transform: uppercase;
}

.wiki-compare-card.highlight .compare-badge {
  background: var(--accent);
  color: #ffffff;
}

/* Citations and Technical Standards Reference Block */
.wiki-references-block {
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 22px 28px;
  margin: 40px 0 25px 0;
  font-size: 0.85rem;
}

.wiki-references-block h4 {
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--primary);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.wiki-references-list {
  padding-left: 20px;
  margin: 0;
  list-style-type: decimal;
}

.wiki-references-list li {
  margin-bottom: 6px;
  color: var(--text-muted);
}

.wiki-references-list li a {
  color: var(--primary-light);
  text-decoration: underline;
}

/* Sitemap Page Grid Styles */
.sitemap-category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
  margin: 40px 0;
}

.sitemap-category-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 26px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.sitemap-category-card h3 {
  color: var(--primary);
  font-size: 1.2rem;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--secondary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.sitemap-category-card h3 i {
  color: var(--secondary);
}

.sitemap-links-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sitemap-links-list li {
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--border-light);
}

.sitemap-links-list li:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.sitemap-links-list li a {
  font-weight: 600;
  color: var(--primary-light);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color var(--transition-fast);
}

.sitemap-links-list li a:hover {
  color: var(--secondary);
  text-decoration: underline;
}

.sitemap-link-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 3px;
  line-height: 1.4;
}

/* Responsive Overrides */
@media (max-width: 992px) {
  .wiki-container {
    grid-template-columns: 1fr;
  }
  .wiki-sidebar {
    position: static;
  }
}