/* ==========================================================================
   WETCOAL Design System & Stylesheet
   Theme: Industrial Cleantech (Dark, Premium, Sustainable)
   ========================================================================== */

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

/* CSS Variables */
:root {
  /* Colors */
  --bg-dark: #070907;
  --bg-darker: #040504;
  --bg-card: #111411;
  --bg-card-hover: #161c16;
  
  --primary-green: #2e7d32;
  --primary-glow: #4caf50;
  --primary-light: #81c784;
  
  --coal-amber: #b8860b;
  --coal-glow: #d97706;
  --coal-light: #f59e0b;
  --coal-card-bg: #15120f;
  --coal-card-hover: #1c1712;

  --text-primary: #f3f4f3;
  --text-secondary: #9ea49e;
  --text-muted: #6c726c;
  
  --border-color: rgba(255, 255, 255, 0.05);
  --border-hover: rgba(76, 175, 80, 0.25);
  --border-coal-hover: rgba(217, 119, 6, 0.25);
  
  /* Typography */
  --font-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  /* Transitions */
  --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: all 0.2s ease;
}

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

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

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

/* Typography Selection & Scrollbar */
::selection {
  background: var(--primary-green);
  color: #fff;
}

::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-darker);
}
::-webkit-scrollbar-thumb {
  background: #222a22;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary-green);
}

/* Typography Elements */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

p {
  color: var(--text-secondary);
  font-weight: 400;
  font-size: 1rem;
}

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

/* Layout Utilities */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 8rem 0;
  position: relative;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.8rem;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition-smooth);
  gap: 0.5rem;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background-color: var(--primary-green);
  color: #fff;
  border: 1px solid var(--primary-glow);
  box-shadow: 0 0 15px rgba(76, 175, 80, 0.15);
}
.btn-primary:hover {
  background-color: var(--primary-glow);
  box-shadow: 0 0 25px rgba(76, 175, 80, 0.35);
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: rgba(255, 255, 255, 0.03);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(5px);
}
.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

/* Background Ambient Glows */
.glow-ambient {
  position: absolute;
  width: 45vw;
  height: 45vw;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(46, 125, 50, 0.08) 0%, rgba(0, 0, 0, 0) 70%);
  top: -10%;
  right: -5%;
  pointer-events: none;
  z-index: 0;
}

.glow-ambient-left {
  position: absolute;
  width: 50vw;
  height: 50vw;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(217, 119, 6, 0.03) 0%, rgba(0, 0, 0, 0) 75%);
  bottom: 10%;
  left: -15%;
  pointer-events: none;
  z-index: 0;
}

/* Header & Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: var(--transition-smooth);
  border-bottom: 1px solid transparent;
  padding: 1.5rem 0;
}

.navbar.scrolled {
  background-color: rgba(7, 9, 7, 0.85);
  backdrop-filter: blur(15px);
  padding: 1rem 0;
  border-bottom: 1px solid var(--border-color);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-img {
  height: 48px; /* Clean size matching the header's layout aspect ratio */
  width: auto;
  display: block;
  transition: var(--transition-smooth);
}

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

/* Footer logo size adjustment */
.footer-logo-panel .logo-img {
  height: 56px;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2.2rem;
  align-items: center;
}

.nav-link a {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.nav-link a:hover, .nav-link.active a {
  color: var(--primary-glow);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-phone {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-secondary);
  transition: var(--transition-fast);
}

.nav-phone:hover {
  color: var(--primary-glow);
}

.nav-phone i {
  color: var(--primary-glow);
  font-size: 1rem;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text-primary);
  margin: 5px 0;
  transition: var(--transition-fast);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 8rem;
  padding-bottom: 5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 4rem;
  align-items: center;
}

.hero-content {
  position: relative;
  z-index: 10;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(46, 125, 50, 0.1);
  border: 1px solid rgba(76, 175, 80, 0.2);
  color: var(--primary-light);
  padding: 0.4rem 1rem;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-size: 3.8rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  line-height: 1.1;
  color: #fff;
}

.hero h1 span {
  background: linear-gradient(135deg, var(--primary-glow), var(--primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-sub {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  max-width: 600px;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-graphics {
  position: relative;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
}

/* Hero Video Player Styling */
.hero-video-wrapper {
  position: relative;
  width: 100%;
  max-width: 540px;
  aspect-ratio: 16 / 9;
  border-radius: 12px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5), 0 0 30px rgba(76, 175, 80, 0.05);
  overflow: hidden;
  transition: var(--transition-smooth);
}

.hero-video-wrapper:hover {
  border-color: var(--border-hover);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6), 0 0 35px rgba(76, 175, 80, 0.15);
  transform: translateY(-4px);
}

.video-container {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-video-iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.video-control-btn {
  position: absolute;
  bottom: 1rem;
  right: 1rem;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: rgba(7, 9, 7, 0.7);
  backdrop-filter: blur(5px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
  z-index: 10;
}

.video-control-btn:hover {
  background-color: var(--primary-green);
  border-color: var(--primary-glow);
  transform: scale(1.1);
}

.video-control-btn i {
  width: 16px;
  height: 16px;
}

/* Reactor Graphic Animation */
.reactor-visual {
  position: relative;
  width: 320px;
  height: 320px;
}

.circle-outer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 2px dashed rgba(76, 175, 80, 0.15);
  border-radius: 50%;
  animation: rotateClockwise 25s linear infinite;
}

.circle-inner {
  position: absolute;
  top: 15px;
  left: 15px;
  width: calc(100% - 30px);
  height: calc(100% - 30px);
  border: 1px solid rgba(76, 175, 80, 0.25);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(17, 20, 17, 0.8) 0%, rgba(7, 9, 7, 0.95) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.reactor-core {
  width: 140px;
  height: 140px;
  background: radial-gradient(circle, rgba(76, 175, 80, 0.2) 0%, rgba(46, 125, 50, 0.05) 70%);
  border: 1px solid rgba(76, 175, 80, 0.3);
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 2;
  box-shadow: 0 0 40px rgba(76, 175, 80, 0.15);
}

.reactor-pulse {
  position: absolute;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  border: 2px solid var(--primary-glow);
  opacity: 0;
  animation: pulseCore 3s ease-out infinite;
  z-index: 1;
}

.reactor-core i {
  font-size: 2.2rem;
  color: var(--primary-glow);
  margin-bottom: 0.5rem;
}

.reactor-core span {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-primary);
}

.orbiting-dot {
  position: absolute;
  width: 12px;
  height: 12px;
  background: var(--primary-glow);
  border-radius: 50%;
  top: 50%;
  left: 50%;
  margin-top: -6px;
  margin-left: -6px;
  box-shadow: 0 0 15px var(--primary-glow);
  animation: orbit 12s linear infinite;
}

.orbiting-dot-amber {
  position: absolute;
  width: 10px;
  height: 10px;
  background: var(--coal-glow);
  border-radius: 50%;
  top: 50%;
  left: 50%;
  margin-top: -5px;
  margin-left: -5px;
  box-shadow: 0 0 15px var(--coal-glow);
  animation: orbit 8s linear infinite reverse;
}

/* Animations Keyframes */
@keyframes rotateClockwise {
  100% { transform: rotate(360deg); }
}
@keyframes pulseCore {
  0% { transform: scale(0.95); opacity: 0.5; }
  100% { transform: scale(1.6); opacity: 0; }
}
@keyframes orbit {
  0% { transform: rotate(0deg) translate(145px) rotate(0deg); }
  100% { transform: rotate(360deg) translate(145px) rotate(-360deg); }
}

/* Section Header */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 5rem;
}

.section-tag {
  color: var(--primary-glow);
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 0.8rem;
  display: block;
}

.section-title {
  font-size: 2.5rem;
  color: #fff;
  margin-bottom: 1.2rem;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
}

/* About WETCOAL */
.about {
  background-color: var(--bg-darker);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 2.2rem 1.8rem;
  border-radius: 8px;
  transition: var(--transition-smooth);
}

.stat-card:hover {
  border-color: var(--border-hover);
  background-color: var(--bg-card-hover);
  transform: translateY(-5px);
}

.stat-num {
  font-family: var(--font-heading);
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--primary-glow);
  margin-bottom: 0.5rem;
  line-height: 1;
}

.stat-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}

.stat-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.about-text h3 {
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
  color: #fff;
}

.about-text p {
  margin-bottom: 1.5rem;
}

.about-features {
  list-style: none;
  margin-top: 2rem;
}

.about-feature {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin-bottom: 0.8rem;
  font-weight: 500;
  color: var(--text-primary);
}

.about-feature i {
  color: var(--primary-glow);
  font-size: 1.1rem;
}

/* APR Technology Section */
.tech-flow {
  background-color: rgba(255, 255, 255, 0.01);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 3.5rem 2rem;
  margin-top: 3rem;
  backdrop-filter: blur(5px);
}

.tech-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 4rem;
  align-items: center;
}

.tech-info h3 {
  font-size: 1.8rem;
  color: #fff;
  margin-bottom: 1.2rem;
}

.tech-info p {
  margin-bottom: 1.5rem;
}

.tech-badges {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.tech-badge {
  background-color: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  padding: 0.6rem 1.2rem;
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.tech-badge i {
  color: var(--primary-glow);
}

/* Flowchart Visual */
.flowchart-container {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.flow-step {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  position: relative;
}

.flow-icon-box {
  width: 60px;
  height: 60px;
  border-radius: 8px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--primary-glow);
  z-index: 2;
  transition: var(--transition-smooth);
}

.flow-step:hover .flow-icon-box {
  border-color: var(--primary-glow);
  background-color: var(--bg-card-hover);
  box-shadow: 0 0 15px rgba(76, 175, 80, 0.2);
}

.flow-content {
  flex: 1;
}

.flow-content h4 {
  font-size: 1.1rem;
  color: #fff;
  margin-bottom: 0.3rem;
}

.flow-content p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.flow-connector {
  position: absolute;
  left: 29px;
  top: 60px;
  width: 2px;
  height: 0; /* Default height is 0 for sequential flow animation */
  background: linear-gradient(to bottom, var(--primary-green) 50%, rgba(255, 255, 255, 0.05) 50%);
  background-size: 100% 20px;
  animation: pulseConnector 1.5s linear infinite;
  z-index: 1;
  transition: height 0.8s ease-in-out;
}

@keyframes pulseConnector {
  to { background-position: 0 20px; }
}

/* Sequential flowchart state classes */
.flow-step, .flow-outputs {
  opacity: 0.2;
  transform: translateY(15px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.flow-step.active-sequence, .flow-outputs.active-sequence {
  opacity: 1;
  transform: translateY(0);
}

.flow-step.active-sequence .flow-connector {
  height: calc(100% - 20px);
}

.flow-outputs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-left: 5rem;
}

.flow-output-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.2rem;
  transition: var(--transition-smooth);
}

.flow-output-card.coal {
  border-left: 3px solid var(--coal-glow);
}
.flow-output-card.coal i {
  color: var(--coal-glow);
}
.flow-output-card.char {
  border-left: 3px solid var(--primary-glow);
}
.flow-output-card.char i {
  color: var(--primary-glow);
}

.flow-output-card:hover {
  transform: translateY(-3px);
}

.flow-output-card.coal:hover {
  border-color: var(--coal-glow);
  box-shadow: 0 0 15px rgba(217, 119, 6, 0.1);
}
.flow-output-card.char:hover {
  border-color: var(--primary-glow);
  box-shadow: 0 0 15px rgba(76, 175, 80, 0.1);
}

.flow-output-card h5 {
  font-size: 0.95rem;
  color: #fff;
  margin-bottom: 0.3rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.flow-output-card p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Products Section */
.products-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
}

.product-card {
  border-radius: 12px;
  padding: 3.5rem;
  position: relative;
  overflow: hidden;
  transition: var(--transition-smooth);
}

.product-card.biocoal {
  background-color: var(--coal-card-bg);
  border: 1px solid var(--border-color);
}

.product-card.biochar {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
}

.product-card::before {
  content: '';
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  pointer-events: none;
  top: -100px;
  right: -100px;
  opacity: 0.15;
  transition: var(--transition-smooth);
}

.product-card.biocoal::before {
  background: radial-gradient(circle, var(--coal-glow) 0%, rgba(0, 0, 0, 0) 70%);
}
.product-card.biochar::before {
  background: radial-gradient(circle, var(--primary-glow) 0%, rgba(0, 0, 0, 0) 70%);
}

/* Product Card Hovers */
.product-card.biocoal:hover {
  border-color: var(--border-coal-hover);
  background-color: var(--coal-card-hover);
  box-shadow: 0 10px 40px rgba(217, 119, 6, 0.05);
  transform: translateY(-8px);
}
.product-card.biochar:hover {
  border-color: var(--border-hover);
  background-color: var(--bg-card-hover);
  box-shadow: 0 10px 40px rgba(76, 175, 80, 0.05);
  transform: translateY(-8px);
}

.product-card:hover::before {
  opacity: 0.25;
  transform: scale(1.1);
}

.product-icon {
  width: 65px;
  height: 65px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 2rem;
  transition: var(--transition-smooth);
}

.product-card.biocoal .product-icon {
  background-color: rgba(217, 119, 6, 0.08);
  border: 1px solid rgba(217, 119, 6, 0.2);
  color: var(--coal-light);
}
.product-card.biochar .product-icon {
  background-color: rgba(76, 175, 80, 0.08);
  border: 1px solid rgba(76, 175, 80, 0.2);
  color: var(--primary-light);
}

.product-card.biocoal:hover .product-icon {
  background-color: var(--coal-glow);
  color: #fff;
  box-shadow: 0 0 20px rgba(217, 119, 6, 0.3);
}
.product-card.biochar:hover .product-icon {
  background-color: var(--primary-glow);
  color: #fff;
  box-shadow: 0 0 20px rgba(76, 175, 80, 0.3);
}

.product-card h3 {
  font-size: 2.2rem;
  color: #fff;
  margin-bottom: 1rem;
}

.product-desc {
  font-size: 1.05rem;
  margin-bottom: 2rem;
  color: var(--text-secondary);
}

.product-specs {
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
  margin-bottom: 2rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.spec-item h5 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.3rem;
}

.spec-item p {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
}

.spec-item p span {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.product-bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.product-bullets li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.product-card.biocoal .product-bullets li i {
  color: var(--coal-light);
}
.product-card.biochar .product-bullets li i {
  color: var(--primary-light);
}

/* Services Section */
.services {
  background-color: var(--bg-darker);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.service-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 3rem 2.2rem;
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.service-card:hover {
  border-color: var(--border-hover);
  background-color: var(--bg-card-hover);
  transform: translateY(-8px);
}

.service-icon {
  width: 55px;
  height: 55px;
  border-radius: 8px;
  background-color: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: var(--primary-glow);
  margin-bottom: 2rem;
  transition: var(--transition-smooth);
}

.service-card:hover .service-icon {
  background-color: var(--primary-glow);
  color: #fff;
  border-color: var(--primary-glow);
  box-shadow: 0 0 20px rgba(76, 175, 80, 0.25);
}

.service-card h3 {
  font-size: 1.4rem;
  color: #fff;
  margin-bottom: 1rem;
}

.service-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  flex: 1;
}

.service-bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  border-top: 1px solid var(--border-color);
  padding-top: 1.5rem;
  margin-top: auto;
}

.service-bullets li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.service-bullets li i {
  color: var(--primary-glow);
  font-size: 0.9rem;
}

/* Who We Serve Section */
.serve-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1.5rem;
}

.serve-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 2.5rem 1.8rem;
  text-align: center;
  transition: var(--transition-smooth);
}

.serve-card:hover {
  border-color: var(--border-hover);
  background-color: var(--bg-card-hover);
  transform: translateY(-5px);
}

.serve-icon-box {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.02);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: var(--primary-glow);
  margin: 0 auto 1.5rem;
  border: 1px solid var(--border-color);
  transition: var(--transition-smooth);
}

.serve-card:hover .serve-icon-box {
  background-color: var(--primary-glow);
  color: #fff;
  border-color: var(--primary-glow);
  box-shadow: 0 0 15px rgba(76, 175, 80, 0.2);
}

.serve-card h3 {
  font-size: 1.1rem;
  color: #fff;
  margin-bottom: 0.6rem;
}

.serve-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Recognition Logo Strip & Marquee */
.support {
  background-color: var(--bg-darker);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: 5.5rem 0;
  overflow: hidden;
}

.support-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2.5rem;
}

.support-label {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--text-muted);
  text-align: center;
}

.marquee-wrapper {
  overflow: hidden;
  width: 100%;
  position: relative;
  display: flex;
  mask-image: linear-gradient(to right, transparent, #000 10%, #000 90%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, #000 10%, #000 90%, transparent);
}

.logo-marquee {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 3.5rem;
  width: max-content;
  animation: marqueeScroll 32s linear infinite;
}

.logo-marquee:hover {
  animation-play-state: paused;
}

.support-logo-card {
  height: 54px;
  padding: 0 1.2rem;
  background-color: #ffffff; /* Solid white background card so all logo colors are visible */
  border-radius: 8px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.06);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-smooth);
}

.support-logo-card:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 8px 18px rgba(76, 175, 80, 0.12);
}

.support-logo-card img {
  height: 100%;
  max-height: 42px;
  max-width: 130px;
  object-fit: contain;
  filter: none !important; /* Full original colors always visible */
  opacity: 1 !important;
  transition: var(--transition-smooth);
}

.marquee-clone {
  display: flex; /* Always display clone for looping marquee on all viewports */
}

/* Infinite Marquee CSS Animation (Left to Right flow) */
@keyframes marqueeScroll {
  0% { transform: translateX(calc(-50% - 1.75rem)); } /* Half of gap offset */
  100% { transform: translateX(0); }
}

@media (max-width: 768px) {
  .logo-marquee {
    animation-duration: 22s; /* Slightly faster loop on smaller viewports */
    gap: 2.5rem;
  }
  @keyframes marqueeScroll {
    0% { transform: translateX(calc(-50% - 1.25rem)); }
    100% { transform: translateX(0); }
  }
}

/* Leadership / Founders Section */
.founders-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 5rem;
  align-items: center;
}

.founders-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.founder-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: var(--transition-smooth);
}

.founder-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-5px);
}

.founder-avatar {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  border: 3px solid var(--primary-glow);
  background: #070907 !important; /* Force dark background so transparent hair/clothing pixels remain black in light mode */
  margin: 2.5rem auto 1.5rem;
  overflow: hidden;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px rgba(76, 175, 80, 0.15);
  transition: var(--transition-smooth);
}

.founder-card:hover .founder-avatar {
  border-color: var(--primary-light);
  box-shadow: 0 12px 30px rgba(76, 175, 80, 0.25);
  transform: scale(1.02);
}

.founder-avatar::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(76, 175, 80, 0.05) 0%, transparent 80%);
}

.founder-info {
  padding: 0 1.8rem 2.2rem;
  text-align: center;
}

.founder-info h3 {
  font-size: 1.2rem;
  color: #fff;
  margin-bottom: 0.3rem;
}

.founder-info h4 {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--primary-light);
  margin-bottom: 0.8rem;
}

.founder-info p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.ip-card {
  background: linear-gradient(135deg, rgba(46, 125, 50, 0.08) 0%, rgba(217, 119, 6, 0.04) 100%);
  border: 1px solid rgba(76, 175, 80, 0.15);
  border-radius: 12px;
  padding: 3rem;
  position: relative;
}

.ip-icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background-color: rgba(76, 175, 80, 0.1);
  border: 1px solid rgba(76, 175, 80, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--primary-glow);
  margin-bottom: 2rem;
}

.ip-card h3 {
  font-size: 1.8rem;
  color: #fff;
  margin-bottom: 1rem;
}

.ip-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 2rem;
}

.ip-highlights {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.ip-item {
  display: flex;
  align-items: flex-start;
  gap: 0.8rem;
  font-size: 0.9rem;
}

.ip-item i {
  color: var(--coal-light);
  margin-top: 0.2rem;
}

/* Contact Us Section */
.contact {
  background-color: var(--bg-darker);
}

.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 5rem;
}

.contact-info-panel {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 2.2rem;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1.2rem;
}

.contact-icon-box {
  width: 50px;
  height: 50px;
  border-radius: 6px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--primary-glow);
  transition: var(--transition-smooth);
}

.contact-item:hover .contact-icon-box {
  border-color: var(--primary-glow);
  background-color: var(--bg-card-hover);
  box-shadow: 0 0 15px rgba(76, 175, 80, 0.2);
}

.contact-text h4 {
  font-size: 1rem;
  color: #fff;
  margin-bottom: 0.3rem;
}

.contact-text p {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.contact-text a {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.contact-text a:hover {
  color: var(--primary-glow);
}

.contact-map-info {
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
  margin-top: 3rem;
}

.contact-map-info h4 {
  font-size: 1rem;
  color: #fff;
  margin-bottom: 0.5rem;
}

/* Contact Form */
.contact-form-container {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 3.5rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.form-group input, 
.form-group select, 
.form-group textarea {
  width: 100%;
  background-color: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-color);
  padding: 0.8rem 1rem;
  border-radius: 6px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: var(--transition-fast);
}

.form-group input:focus, 
.form-group select:focus, 
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-glow);
  box-shadow: 0 0 10px rgba(76, 175, 80, 0.15);
  background-color: rgba(0, 0, 0, 0.4);
}

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

.form-group select option {
  background-color: var(--bg-card);
  color: var(--text-primary);
}

/* Form Success & Error Messages */
.form-message {
  display: none;
  padding: 1rem;
  border-radius: 6px;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
  font-weight: 500;
}

.form-message.success {
  display: block;
  background-color: rgba(46, 125, 50, 0.15);
  border: 1px solid rgba(76, 175, 80, 0.3);
  color: var(--primary-light);
}

.form-message.error {
  display: block;
  background-color: rgba(220, 38, 38, 0.15);
  border: 1px solid rgba(220, 38, 38, 0.3);
  color: #f87171;
}

/* Footer Section */
footer {
  background-color: var(--bg-darker);
  border-top: 1px solid var(--border-color);
  padding: 5rem 0 3rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 4rem;
  margin-bottom: 4rem;
}

.footer-logo-panel p {
  margin-top: 1rem;
  font-size: 0.95rem;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 1rem;
  color: #fff;
  margin-bottom: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.footer-links a {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

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

.footer-contact-info {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-contact-info li {
  display: flex;
  align-items: flex-start;
  gap: 0.8rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.footer-contact-info li i {
  color: var(--primary-glow);
  margin-top: 0.25rem;
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-socials {
  display: flex;
  gap: 1.2rem;
}

.social-link {
  width: 35px;
  height: 35px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: var(--transition-fast);
}

.social-link:hover {
  background-color: var(--primary-green);
  color: #fff;
  border-color: var(--primary-green);
  transform: translateY(-2px);
}

/* Intersection Observer Animations */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

/* Responsive Media Queries */
@media (max-width: 1024px) {
  section {
    padding: 6rem 0;
  }
  
  .hero h1 {
    font-size: 3.2rem;
  }
  
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
    text-align: center;
  }
  
  .hero-sub {
    margin: 0 auto 2.5rem;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .about-grid, .tech-grid, .founders-grid, .contact-grid {
    grid-template-columns: 1fr;
    gap: 4rem;
  }
  
  .services-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .serve-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .flowchart-container {
    max-width: 600px;
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  html {
    font-size: 15px;
  }
  
  .navbar {
    padding: 1.2rem 0;
  }
  
  .logo-img {
    height: 38px; /* Slightly smaller logo on mobile to prevent navbar crowding */
  }
  
  .mobile-toggle {
    display: block;
    z-index: 1001;
  }
  
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 320px;
    height: 100vh;
    background-color: var(--bg-dark);
    border-left: 1px solid var(--border-color);
    flex-direction: column;
    justify-content: center;
    gap: 2.5rem;
    padding: 2rem;
    transition: var(--transition-smooth);
    z-index: 1000;
    box-shadow: -10px 0 30px rgba(0,0,0,0.5);
  }
  
  .nav-links.open {
    right: 0;
  }
  
  .mobile-toggle.open span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  
  .mobile-toggle.open span:nth-child(2) {
    opacity: 0;
  }
  
  .mobile-toggle.open span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }
  
  .nav-right {
    display: none;
  }
  
  .products-grid {
    grid-template-columns: 1fr;
  }
  
  .product-card {
    padding: 2.5rem;
  }
  
  .services-grid {
    grid-template-columns: 1fr;
  }
  
  .serve-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .founders-list {
    grid-template-columns: 1fr;
  }
  
  .contact-form-container {
    padding: 2rem;
  }
  
  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1.25rem; /* Spacious padding on narrow screens */
  }

  .hero h1 {
    font-size: 2.2rem; /* Avoid word-wrap issues on iPhone SE screens */
  }
  
  .serve-grid {
    grid-template-columns: 1fr;
  }
  
  .flow-outputs {
    grid-template-columns: 1fr;
    margin-left: 0;
    margin-top: 1.5rem;
  }
  
  .flow-step {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.8rem;
  }
  
  .flow-connector {
    display: none;
  }
  
  .logo-strip {
    gap: 2rem;
  }
  
  .support-logo {
    height: 38px;
  }

  /* Center resources card actions on narrow viewports */
  .one-pager-content {
    text-align: center;
  }

  .one-pager-content div[style*="display: flex"] {
    justify-content: center;
  }
}

/* ==========================================================================
   Addendum Upgrades CSS Classes
   ========================================================================== */

/* Grid blueprint background for the body */
body {
  background-color: var(--bg-dark);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
  background-image: 
    linear-gradient(rgba(76, 175, 80, 0.012) 1px, transparent 1px),
    linear-gradient(90deg, rgba(76, 175, 80, 0.012) 1px, transparent 1px);
  background-size: 50px 50px;
  background-position: center;
}

/* 1. Scroll Progress Indicator */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(to right, var(--primary-green), var(--primary-glow));
  width: 0%;
  z-index: 2000;
  box-shadow: 0 0 10px var(--primary-glow);
  transition: width 0.1s ease-out;
}

/* 2. Page Loader Overlay */
.page-loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: var(--bg-darker);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 1;
  transition: opacity 0.5s ease-in-out, visibility 0.5s;
}

.page-loader.fade-out {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.loader-logo {
  height: 70px;
  width: auto;
  animation: loaderPulse 1.5s ease-in-out infinite;
}

.loader-bar {
  width: 140px;
  height: 2px;
  background-color: rgba(255, 255, 255, 0.05);
  border-radius: 4px;
  position: relative;
  overflow: hidden;
}

.loader-bar::after {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 30%;
  background-color: var(--primary-glow);
  animation: loaderBarMove 1.2s ease-in-out infinite;
}

@keyframes loaderPulse {
  0%, 100% { transform: scale(1); opacity: 0.8; }
  50% { transform: scale(1.05); opacity: 1; }
}

@keyframes loaderBarMove {
  0% { left: -30%; }
  100% { left: 100%; }
}

/* 3. Hero Glowing Ambient Blobs */
.hero-glow-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.04;
  pointer-events: none;
  z-index: 1;
}

.hero-glow-blob.blob-1 {
  width: 400px;
  height: 400px;
  background-color: var(--primary-glow);
  top: 15%;
  left: 10%;
  animation: floatGlow1 12s ease-in-out infinite;
}

.hero-glow-blob.blob-2 {
  width: 500px;
  height: 500px;
  background-color: var(--primary-green);
  bottom: 10%;
  right: 5%;
  animation: floatGlow2 16s ease-in-out infinite;
}

@keyframes floatGlow1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(45px, 35px) scale(1.1); }
}

@keyframes floatGlow2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-35px, -50px) scale(1.05); }
}

/* 4. Company Brochure Section */
.one-pager {
  background-color: var(--bg-dark);
  padding: 8rem 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.one-pager-card {
  background: linear-gradient(135deg, rgba(18, 22, 18, 0.7) 0%, rgba(21, 25, 21, 0.4) 100%);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 4.5rem;
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

.one-pager-card::before {
  content: '';
  position: absolute;
  top: -150px;
  left: -150px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(76, 175, 80, 0.04) 0%, transparent 70%);
  pointer-events: none;
}

.one-pager-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 4rem;
  align-items: center;
}

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

.one-pager-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  line-height: 1.7;
}

.one-pager-actions {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.file-size-info {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-family: var(--font-heading);
}

.one-pager-preview-box {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  z-index: 2;
}

.preview-link {
  width: 100%;
  max-width: 280px;
  display: block;
}

.preview-card {
  position: relative;
  background-color: var(--bg-darker);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  aspect-ratio: 1 / 1.414; /* Standard portrait A4 aspect ratio */
  box-shadow: 0 15px 35px rgba(0,0,0,0.4);
  transition: var(--transition-smooth);
}

.preview-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.85;
  transition: var(--transition-smooth);
}

.preview-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(7, 9, 7, 0.75);
  backdrop-filter: blur(2px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  opacity: 0;
  gap: 0.8rem;
  transition: var(--transition-smooth);
  color: #fff;
}

.preview-overlay i {
  font-size: 1.8rem;
  color: var(--primary-glow);
}

.preview-overlay span {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.05em;
}

/* Hover effects */
.preview-card:hover {
  transform: translateY(-8px) rotate(1deg);
  border-color: var(--border-hover);
  box-shadow: 0 20px 40px rgba(76, 175, 80, 0.15);
}

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

.preview-card:hover .preview-overlay {
  opacity: 1;
}

/* 5. Card Hover Shadow Polish Upgrades */
.product-card.biocoal:hover {
  border-color: var(--border-coal-hover);
  box-shadow: 0 15px 40px rgba(217, 119, 6, 0.15);
  transform: translateY(-6px);
}

.product-card.biochar:hover {
  border-color: var(--border-hover);
  box-shadow: 0 15px 40px rgba(76, 175, 80, 0.15);
  transform: translateY(-6px);
}

.service-card:hover {
  border-color: var(--border-hover);
  box-shadow: 0 15px 35px rgba(76, 175, 80, 0.12);
  transform: translateY(-6px);
}

.serve-card:hover {
  border-color: var(--border-hover);
  box-shadow: 0 10px 25px rgba(76, 175, 80, 0.08);
  transform: translateY(-5px);
}

/* Navigation Link Underline Hover Detail */
.nav-link a {
  position: relative;
}
.nav-link a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--primary-glow);
  transition: width 0.3s ease;
}
.nav-link a:hover::after, .nav-link.active a::after {
  width: 100%;
}

/* 6. Futuristic Scroll-Reveal Typography Updates */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  filter: blur(5px);
  transition: opacity 1.2s cubic-bezier(0.16, 1, 0.3, 1), 
              transform 1.2s cubic-bezier(0.16, 1, 0.3, 1), 
              filter 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Swipe border indicator animations for heading elements */
.section-title {
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -8px;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-glow), transparent);
  transition: width 1.2s cubic-bezier(0.16, 1, 0.3, 1);
  transition-delay: 0.3s;
}

.reveal.active .section-title::after {
  width: 120px;
}

/* Cyberpunk industrial indicators for cards */
.product-card::after, .service-card::after {
  content: 'W-APR // ENG';
  position: absolute;
  bottom: 12px;
  right: 16px;
  font-family: var(--font-heading);
  font-size: 0.55rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  opacity: 0.4;
}

.product-card.biocoal::after {
  content: 'W-APR // COAL';
}

.product-card.biochar::after {
  content: 'W-APR // SOIL';
}

@media (max-width: 1024px) {
  .one-pager-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .one-pager-preview-box {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .one-pager-card {
    padding: 2rem;
  }
  .one-pager-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 1rem;
  }
  .file-size-info {
    text-align: center;
  }
}

/* ==========================================================================
   Founder photos, Light/Dark theme and Toggle Button styles
   ========================================================================== */

/* 1. Founder Image Profile Styling */
.founder-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transform: scale(1.05); /* Zoom in slightly to hide outer black margin lines of the uploaded circular frame */
  transition: var(--transition-smooth);
}

.founder-card:hover .founder-image {
  transform: scale(1.12); /* Interactive zoom on hover */
}

/* 2. Theme Toggle Buttons Styles */
.theme-toggle {
  background: none;
  border: 1px solid var(--border-color);
  border-radius: 50%;
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-primary);
  transition: var(--transition-fast);
  margin-right: 1.5rem;
  z-index: 1002;
}

.theme-toggle:hover {
  background-color: rgba(255, 255, 255, 0.05);
  border-color: var(--primary-glow);
  color: var(--primary-glow);
}

.theme-toggle .sun-icon {
  display: none;
}
.theme-toggle .moon-icon {
  display: block;
}

/* 3. Smooth switching transition styles */
body, .navbar, footer, section, .product-card, .service-card, .serve-card, .founder-card, .ip-card, .stat-card, .one-pager-card, input, select, textarea, .theme-toggle {
  transition: background-color 0.5s ease, border-color 0.5s ease, color 0.3s ease, box-shadow 0.5s ease;
}

/* 4. Light Theme CSS Variable Overrides */
body.light-theme {
  --bg-dark: #f5f7f5;
  --bg-darker: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #eef2ee;
  
  --primary-green: #2e7d32;
  --primary-glow: #388e3c; /* Slightly darker green for light mode contrast */
  --primary-light: #4caf50;
  
  --coal-amber: #b8860b;
  --coal-glow: #d97706;
  --coal-light: #f59e0b;
  --coal-card-bg: #fdfbf7;
  --coal-card-hover: #f9f5eb;

  --text-primary: #111411; /* Dark gray text */
  --text-secondary: #4a544a; /* Medium slate text */
  --text-muted: #758075; /* Light muted text */
  
  --border-color: rgba(0, 0, 0, 0.08);
  --border-hover: rgba(76, 175, 80, 0.4);
  --border-coal-hover: rgba(217, 119, 6, 0.4);
  
  background-image: 
    linear-gradient(rgba(76, 175, 80, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(76, 175, 80, 0.02) 1px, transparent 1px);
}

/* Light mode specifics overrides */
body.light-theme .theme-toggle:hover {
  background-color: rgba(0, 0, 0, 0.03);
}

body.light-theme .theme-toggle .sun-icon {
  display: block;
  color: #f59e0b; /* Sunny amber icon color */
}
body.light-theme .theme-toggle .moon-icon {
  display: none;
}

/* Logo inversion to dark color in light theme */
body.light-theme .logo-img, body.light-theme .loader-logo {
  filter: invert(1) brightness(0.1);
}

/* Card shadows in light mode (replaces neon glows) */
body.light-theme .product-card, 
body.light-theme .service-card, 
body.light-theme .serve-card, 
body.light-theme .founder-card, 
body.light-theme .ip-card, 
body.light-theme .stat-card, 
body.light-theme .one-pager-card {
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.04);
}

body.light-theme .product-card.biocoal:hover {
  box-shadow: 0 15px 40px rgba(217, 119, 6, 0.15);
}
body.light-theme .product-card.biochar:hover {
  box-shadow: 0 15px 40px rgba(76, 175, 80, 0.15);
}
body.light-theme .service-card:hover {
  box-shadow: 0 15px 35px rgba(76, 175, 80, 0.15);
}

body.light-theme .btn-outline {
  border-color: var(--border-color) !important;
  color: var(--text-primary) !important;
}
body.light-theme .btn-outline:hover {
  background-color: rgba(0, 0, 0, 0.03) !important;
}

body.light-theme .one-pager-actions .btn-outline {
  border-color: var(--border-color) !important;
  color: var(--text-primary) !important;
}

body.light-theme .one-pager-card::before {
  background: radial-gradient(circle, rgba(76, 175, 80, 0.1) 0%, transparent 70%);
}

body.light-theme .one-pager-card {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(245, 247, 245, 0.8) 100%);
}

/* 5. Light Theme Text Color Universal Inversions */
body.light-theme h1, 
body.light-theme h2, 
body.light-theme h3, 
body.light-theme h4, 
body.light-theme h5, 
body.light-theme h6,
body.light-theme .hero h1,
body.light-theme .about-text h3,
body.light-theme .flow-step h4,
body.light-theme .flow-output-card h5,
body.light-theme .product-card h3,
body.light-theme .service-card h3,
body.light-theme .service-price,
body.light-theme .price-period,
body.light-theme .serve-card h3,
body.light-theme .founder-card h3,
body.light-theme .contact h2,
body.light-theme .contact-method h4,
body.light-theme .form-group label,
body.light-theme .footer-col h4,
body.light-theme .contact-map-info h4,
body.light-theme .spec-item p {
  color: var(--text-primary) !important;
}

body.light-theme .section-desc,
body.light-theme .hero-sub,
body.light-theme .flow-content p,
body.light-theme .flow-output-card p,
body.light-theme .product-desc,
body.light-theme .spec-label,
body.light-theme .spec-val,
body.light-theme .service-desc,
body.light-theme .feature-item span,
body.light-theme .serve-card p,
body.light-theme .founder-card p,
body.light-theme .ip-card p,
body.light-theme .ip-item span,
body.light-theme .one-pager-desc,
body.light-theme .contact-text p,
body.light-theme .footer-logo-panel p,
body.light-theme .footer-links a,
body.light-theme .footer-contact-info span,
body.light-theme .footer-bottom p {
  color: var(--text-secondary) !important;
}

body.light-theme .nav-link a,
body.light-theme .nav-phone span {
  color: var(--text-primary) !important;
}

body.light-theme .nav-link a::after {
  background-color: var(--primary-glow);
}