/* ============================================
   CLEARPANELS - ULTRA-MODERN DESIGN SYSTEM
   Futuristic Solar Panel Cleaning Service
   ============================================ */

/* Import Futuristic Typography */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;700;800;900&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Glacial+Indifference:wght@400;700&display=swap');

/* ============================================
   CSS CUSTOM PROPERTIES - DESIGN TOKENS
   ============================================ */
:root {
  /* Brand Colors - ClearPanels Official Palette */
  --brand-blue-1: #00509D;
  /* Deep Science Blue - Primary Accent */
  --brand-blue-2: #00AEEF;
  /* Electric Cyan - Secondary Glow */
  --brand-blue-3: #0B1C33;
  /* Dark Navy - Typography */

  /* Background */
  --bg-white: #FFFFFF;
  /* Pure White */
  --bg-tint: #E6F7FF;
  /* Ultra-Clean White Tint */

  /* Glow & Light Effects */
  --glow-blue-soft: rgba(0, 174, 239, 0.3);
  /* Electric Cyan soft glow */
  --glow-blue-medium: rgba(0, 174, 239, 0.5);
  /* Electric Cyan medium glow */
  --glow-blue-intense: rgba(0, 174, 239, 0.8);
  /* Electric Cyan intense glow */
  --glow-primary: rgba(0, 80, 157, 0.4);
  /* Deep Science Blue glow */

  /* Glassmorphism */
  --glass-bg: rgba(230, 247, 255, 0.7);
  /* Ultra-Clean White Tint with transparency */
  --glass-border: rgba(0, 174, 239, 0.2);
  /* Electric Cyan border */
  --glass-shadow: 0 8px 32px 0 rgba(0, 80, 157, 0.1);
  /* Deep Science Blue shadow */

  /* Typography */
  --font-primary: 'Glacial Indifference', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Glacial Indifference', 'Inter', sans-serif;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  --spacing-2xl: 8rem;

  /* Animation Timing */
  --transition-fast: 0.2s ease;
  --transition-medium: 0.4s ease;
  --transition-slow: 0.8s ease;

  /* Z-Index Layers */
  --z-background: -1;
  --z-content: 1;
  --z-floating: 10;
  --z-header: 50;
  --z-overlay: 1000;
}

/* ============================================
   GLOBAL RESET & BASE STYLES
   ============================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: var(--font-primary);
  background: var(--bg-white);
  color: var(--brand-blue-3);
  /* Dark Navy */
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* ============================================
   TYPOGRAPHY SYSTEM
   ============================================ */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.hero-title {
  font-size: clamp(3rem, 8vw, 7rem);
  font-weight: 900;
  background: linear-gradient(135deg, var(--brand-blue-3) 0%, var(--brand-blue-1) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-md);
  animation: titleGlow 3s ease-in-out infinite;
}

.section-title {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 800;
  color: #1a1a1a;
  margin-bottom: var(--spacing-lg);
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -15px;
  left: 0;
  width: 60%;
  height: 4px;
  background: linear-gradient(90deg, var(--brand-blue-1), transparent);
  box-shadow: 0 0 20px var(--glow-blue-medium);
}

.subtitle {
  font-size: clamp(1.2rem, 2.5vw, 1.8rem);
  font-weight: 300;
  color: #4a4a4a;
  max-width: 800px;
  margin: 0 auto var(--spacing-md);
}

/* ============================================
   GLASSMORPHISM UTILITIES
   ============================================ */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  border-radius: 24px;
}

.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  border-radius: 24px;
  padding: var(--spacing-lg);
  transition: all var(--transition-medium);
  position: relative;
  overflow: hidden;
}

.glass-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-blue-1), var(--brand-blue-3));
  opacity: 0;
  transition: opacity var(--transition-medium);
}

.glass-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 60px 0 var(--glow-blue-medium);
  border-color: var(--brand-blue-1);
}

.glass-card:hover::before {
  opacity: 1;
}

/* ============================================
   GLOW EFFECTS
   ============================================ */
.glow-blue {
  box-shadow: 0 0 30px var(--glow-blue-soft),
    0 0 60px var(--glow-blue-soft);
}

.glow-text {
  text-shadow: 0 0 20px var(--glow-blue-medium);
}

.energy-glow {
  position: relative;
}

.energy-glow::after {
  content: '';
  position: absolute;
  inset: -2px;
  background: linear-gradient(45deg, var(--brand-blue-1), var(--brand-blue-3));
  border-radius: inherit;
  z-index: -1;
  opacity: 0;
  filter: blur(20px);
  transition: opacity var(--transition-medium);
}

.energy-glow:hover::after {
  opacity: 0.6;
  animation: energyPulse 2s ease-in-out infinite;
}

/* ============================================
   NAVIGATION BAR
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  padding: var(--spacing-md) var(--spacing-lg);
  transition: all var(--transition-medium);
}

.navbar.scrolled {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: 0 4px 30px rgba(10, 132, 255, 0.05);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-container {
  display: flex;
  align-items: center;
}

.logo {
  height: 50px;
  filter: drop-shadow(0 0 10px var(--glow-blue-soft));
  transition: filter var(--transition-fast);
}

.logo:hover {
  filter: drop-shadow(0 0 20px var(--glow-blue-medium));
}

.nav-links {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
}

.nav-links a {
  color: #1a1a1a;
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--brand-blue-1);
  transition: width var(--transition-fast);
  box-shadow: 0 0 10px var(--glow-blue-medium);
}

.nav-links a:hover {
  color: var(--brand-blue-1);
}

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

/* ============================================
   BUTTONS & CTAs
   ============================================ */
.btn {
  display: inline-block;
  padding: 1.2rem 3rem;
  font-size: 1.1rem;
  font-weight: 700;
  text-decoration: none;
  border-radius: 50px;
  transition: all var(--transition-medium);
  cursor: pointer;
  border: none;
  font-family: var(--font-display);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  position: relative;
  overflow: visible;
  z-index: 100;
  line-height: 1.5;
}

.btn-primary {
  background: linear-gradient(135deg, var(--brand-blue-1), var(--brand-blue-2));
  color: white !important;
  box-shadow: 0 10px 40px var(--glow-blue-medium);
}

.btn-primary,
.btn-primary:link,
.btn-primary:visited,
.btn-primary:hover,
.btn-primary:active {
  color: white !important;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
  z-index: -1;
}

.btn-primary:hover::before {
  width: 300px;
  height: 300px;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 60px var(--glow-blue-intense);
}

.btn-secondary {
  background: var(--bg-white);
  color: var(--brand-blue-1) !important;
  border: 2px solid var(--brand-blue-1);
  position: relative;
  z-index: 1;
}

.btn-secondary,
.btn-secondary:link,
.btn-secondary:visited {
  color: var(--brand-blue-1) !important;
}

.btn-secondary:hover {
  background: var(--brand-blue-1);
  color: white;
  box-shadow: 0 10px 40px var(--glow-blue-medium);
  transform: translateY(-3px);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: var(--spacing-2xl) var(--spacing-md);
}

.hero-background {
  position: absolute;
  inset: 0;
  z-index: var(--z-background);
  overflow: hidden;
  background: var(--bg-white);
  will-change: transform;
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.15;
  filter: brightness(1.2);
}

.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  max-width: 1200px;
  animation: fadeInUp 1s ease-out;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-top: var(--spacing-lg);
  position: relative;
  z-index: 200;
}

/* Floating particles effect */
.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--brand-blue-1);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--glow-blue-medium);
  animation: float 6s ease-in-out infinite;
  opacity: 0.6;
}

/* ============================================
   SECTIONS
   ============================================ */
section {
  padding: var(--spacing-2xl) var(--spacing-md);
  position: relative;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
}

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

/* ============================================
   THE SCIENCE SECTION
   ============================================ */
.science-comparison {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

.comparison-card {
  position: relative;
  padding: var(--spacing-lg);
  border-radius: 24px;
  overflow: hidden;
  transition: transform var(--transition-medium);
}

.comparison-card.dirty {
  background: linear-gradient(135deg, rgba(139, 69, 19, 0.1), rgba(160, 82, 45, 0.1));
  border: 2px solid rgba(139, 69, 19, 0.3);
}

.comparison-card.pure {
  background: linear-gradient(135deg, rgba(10, 132, 255, 0.05), rgba(96, 165, 250, 0.05));
  border: 2px solid var(--brand-blue-1);
  box-shadow: 0 0 40px var(--glow-blue-soft);
}

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

.comparison-visual {
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: 16px;
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  position: relative;
  overflow: hidden;
}

.comparison-card.dirty .comparison-visual {
  background: linear-gradient(135deg, #8B4513, #A0522D);
  opacity: 0.7;
}

.comparison-card.pure .comparison-visual {
  background: linear-gradient(135deg, var(--brand-blue-1), var(--brand-blue-3));
  animation: shimmer 3s ease-in-out infinite;
}

.filtration-process {
  margin-top: var(--spacing-xl);
  padding: var(--spacing-lg);
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border-radius: 24px;
  border: 1px solid var(--glass-border);
}

.process-steps {
  display: flex;
  justify-content: space-around;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.process-step {
  text-align: center;
  flex: 1;
  min-width: 200px;
}

.process-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-sm);
  background: linear-gradient(135deg, var(--brand-blue-1), var(--brand-blue-3));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: white;
  box-shadow: 0 10px 30px var(--glow-blue-medium);
  animation: pulse 2s ease-in-out infinite;
}

.process-arrow-wrapper {
  font-size: 2rem;
  color: var(--brand-blue-1);
}

.arrow-d {
  display: inline-block !important;
}

.arrow-m {
  display: none !important;
}


/* ============================================
   SERVICES & PRICING CARDS
   ============================================ */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.service-card {
  position: relative;
  perspective: 1000px;
}

.service-card-inner {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  border-radius: 24px;
  padding: var(--spacing-lg);
  transition: all var(--transition-medium);
  position: relative;
  overflow: hidden;
}

.service-card-inner::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg,
      transparent,
      rgba(0, 174, 239, 0.1),
      transparent);
  transition: left 0.5s ease;
}

.service-card:hover .service-card-inner::before {
  left: 100%;
}

.service-card:hover .service-card-inner {
  transform: translateY(-8px);
  box-shadow: 0 20px 50px var(--glow-blue-soft);
  border-color: var(--brand-blue-2);
}

.service-tier {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--brand-blue-1);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-sm);
}

.service-name {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: var(--spacing-md);
  color: #1a1a1a;
}

.service-price {
  font-size: 3.5rem;
  font-weight: 900;
  font-family: var(--font-display);
  background: linear-gradient(135deg, var(--brand-blue-1), var(--brand-blue-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-md);
}

.service-features {
  list-style: none;
  margin: var(--spacing-md) 0;
}

.service-features li {
  padding: var(--spacing-sm) 0;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.service-features li::before {
  content: '✓';
  color: var(--brand-blue-1);
  font-weight: 900;
  font-size: 1.2rem;
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
  margin-top: var(--spacing-lg);
}

.about-text {
  font-size: 1.2rem;
  line-height: 1.8;
  color: #4a4a4a;
}

.about-highlight {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border-left: 4px solid var(--brand-blue-1);
  padding: var(--spacing-md);
  margin: var(--spacing-md) 0;
  border-radius: 8px;
  box-shadow: 0 4px 20px var(--glow-blue-soft);
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
}

.stat-item {
  text-align: center;
  padding: var(--spacing-md);
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border-radius: 16px;
  border: 1px solid var(--glass-border);
}

.stat-number {
  font-size: 3rem;
  font-weight: 900;
  font-family: var(--font-display);
  background: linear-gradient(135deg, var(--brand-blue-1), var(--brand-blue-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.9rem;
  color: #4a4a4a;
  margin-top: var(--spacing-xs);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--bg-white);
  border-top: 1px solid rgba(10, 132, 255, 0.1);
  padding: var(--spacing-lg) var(--spacing-md);
  text-align: center;
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-links {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
}

.footer-links a {
  color: #4a4a4a;
  text-decoration: none;
  font-weight: 600;
  transition: all var(--transition-fast);
  position: relative;
}

.footer-links a:hover {
  color: var(--brand-blue-1);
  text-shadow: 0 0 10px var(--glow-blue-soft);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--brand-blue-1);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
  transition: all var(--transition-fast);
}

.mobile-menu-toggle:hover {
  color: var(--brand-blue-2);
  transform: scale(1.1);
}

.footer-contact {
  color: #4a4a4a;
}

.footer-contact a {
  color: var(--brand-blue-1);
  text-decoration: none;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.footer-contact a:hover {
  text-shadow: 0 0 10px var(--glow-blue-medium);
}

.social-links {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--brand-blue-1);
  color: white !important;
  font-size: 1.1rem;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.social-links a:hover {
  background: var(--brand-blue-2);
  transform: translateY(-3px);
  box-shadow: 0 5px 15px var(--glow-blue-soft);
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--brand-blue-1), var(--brand-blue-2));
  color: white;
  border: none;
  border-radius: 50%;
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-fast);
  box-shadow: 0 5px 20px var(--glow-blue-soft);
  z-index: 1001;
}

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

.back-to-top:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px var(--glow-blue-medium);
}

/* Booking Section Styles */
.booking-container {
  padding: 3.5rem;
  margin-top: 2rem;
  text-align: center;
}

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

.booking-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.booking-icon {
  width: 70px;
  height: 70px;
  background: linear-gradient(135deg, var(--brand-blue-1), var(--brand-blue-2));
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: white;
  margin-bottom: 0.5rem;
  box-shadow: 0 10px 25px var(--glow-blue-soft);
  transition: all var(--transition-fast);
}

.booking-item:hover .booking-icon {
  transform: translateY(-5px);
  box-shadow: 0 15px 35px var(--glow-blue-medium);
}

.booking-item h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--brand-blue-1);
}

.booking-item p {
  color: #666;
  font-size: 0.95rem;
}

.booking-link {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: #333;
  text-decoration: none;
  font-weight: 800;
  transition: all var(--transition-fast);
  padding: 0.5rem 1rem;
  border-bottom: 2px solid transparent;
}

.booking-link:hover {
  color: var(--brand-blue-1);
  border-bottom-color: var(--brand-blue-1);
}

.booking-notice {
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(10, 132, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  color: #4a4a4a;
  font-size: 1.1rem;
}

.booking-notice i {
  color: var(--brand-blue-1);
}

@media (max-width: 768px) {
  .booking-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .booking-container {
    padding: 2.5rem 1.5rem;
  }

  .booking-link {
    font-size: 1.2rem;
  }
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes float {

  0%,
  100% {
    transform: translateY(0) translateX(0);
  }

  25% {
    transform: translateY(-20px) translateX(10px);
  }

  50% {
    transform: translateY(-40px) translateX(-10px);
  }

  75% {
    transform: translateY(-20px) translateX(5px);
  }
}

@keyframes pulse {

  0%,
  100% {
    transform: scale(1);
    box-shadow: 0 10px 30px var(--glow-blue-medium);
  }

  50% {
    transform: scale(1.05);
    box-shadow: 0 15px 50px var(--glow-blue-intense);
  }
}

@keyframes shimmer {
  0% {
    background-position: -1000px 0;
  }

  100% {
    background-position: 1000px 0;
  }
}

@keyframes shine {
  0% {
    top: -50%;
    left: -50%;
  }

  100% {
    top: 150%;
    left: 150%;
  }
}

@keyframes slideRight {

  0%,
  100% {
    transform: translateX(0);
  }

  50% {
    transform: translateX(10px);
  }
}

@keyframes energyPulse {

  0%,
  100% {
    opacity: 0.6;
    filter: blur(20px);
  }

  50% {
    opacity: 1;
    filter: blur(30px);
  }
}

@keyframes titleGlow {

  0%,
  100% {
    filter: drop-shadow(0 0 5px var(--glow-blue-soft));
  }

  50% {
    filter: drop-shadow(0 0 20px var(--glow-blue-medium));
  }
}

/* Water droplet animation */
@keyframes droplet {
  0% {
    transform: translateY(-100vh) scale(0);
    opacity: 0;
  }

  10% {
    opacity: 1;
  }

  90% {
    opacity: 1;
  }

  100% {
    transform: translateY(100vh) scale(1);
    opacity: 0;
  }
}

.water-droplet {
  position: absolute;
  width: 20px;
  height: 20px;
  background: radial-gradient(circle, var(--brand-blue-3), var(--brand-blue-1));
  border-radius: 50% 50% 50% 0;
  transform: rotate(-45deg);
  opacity: 0.7;
  filter: blur(1px);
  box-shadow: 0 0 20px var(--glow-blue-medium);
  animation: droplet linear infinite;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
  .about-content {
    grid-template-columns: 1fr;
  }

  .nav-links {
    gap: var(--spacing-md);
  }
}

@media (max-width: 768px) {
  :root {
    --spacing-lg: 2rem;
    --spacing-xl: 4rem;
    --spacing-2xl: 5rem;
  }

  .navbar {
    padding: var(--spacing-sm) var(--spacing-md);
  }

  /* Mobile Menu */
  .mobile-menu-toggle {
    display: block;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 70%;
    max-width: 300px;
    height: 100vh;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 5rem 2rem 2rem;
    gap: 2rem;
    box-shadow: -5px 0 20px rgba(0, 0, 0, 0.1);
    transition: right 0.3s ease;
    z-index: 1000;
  }

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

  .nav-links li {
    width: 100%;
  }

  .nav-links a {
    display: block;
    padding: 1rem;
    font-size: 1.2rem;
    border-bottom: 1px solid rgba(10, 132, 255, 0.1);
  }

  /* Mobile Overlay */
  .mobile-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
  }

  .mobile-overlay.active {
    display: block;
  }

  .hero {
    padding: var(--spacing-xl) var(--spacing-md);
    padding-top: calc(var(--spacing-xl) + 3rem);
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 300px;
  }

  /* Mobile Navigation Styles */
  .mobile-menu-toggle {
    display: block;
    z-index: 101;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    height: 100vh;
    width: 70%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: right 0.3s ease-in-out;
    box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
    z-index: 100;
  }

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

  .nav-container {
    align-items: center;
    /* Ensure logo stays centered/top aligned */
    padding: 0.5rem 0;
    /* Simpler padding for mobile */
  }

  .navbar {
    padding: 1rem;
    /* Reduce overall navbar padding on mobile */
  }

  .logo {
    height: 40px;
    /* Slightly smaller logo on mobile */
  }

  /* Process Steps Mobile */
  .process-steps {
    flex-direction: column;
    gap: 2rem;
    align-items: center;
  }

  .process-arrow-wrapper {
    width: 100%;
    display: flex;
    justify-content: center;
    margin: 1rem 0;
    font-size: 2rem;
    color: var(--brand-blue-1);
    animation: none;
  }

  /* Robust visibility control */
  .arrow-d {
    display: none !important;
  }

  .arrow-m {
    display: block !important;
  }

  /* Comparison Cards Mobile */
  .science-comparison {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  /* About Stats Mobile */
  .about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    justify-content: center;
  }

  .stat-item {
    width: 100%;
    padding: 1rem 0.5rem;
    margin: 0 auto;
  }

  .stat-number {
    font-size: 2rem;
  }

  .stat-label {
    font-size: 0.85rem;
  }

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

  .footer-content {
    flex-direction: column;
    text-align: center;
  }

  .footer-links {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2.5rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .process-steps {
    flex-direction: column;
  }

  .process-arrow {
    transform: rotate(90deg);
  }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-center {
  text-align: center;
}

.mt-lg {
  margin-top: var(--spacing-lg);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

.hidden {
  display: none;
}

.visible {
  display: block;
}