/* CSS Variables - Design System */
:root {
  /* Colors */
  --color-primary: #2c6e49;
  --color-secondary: #f4f1de;
  --color-aqua: #D9F0F7;
  --color-white: #FAFBFA;
  --color-slate: #4B5B63;
  --color-sand: #E8E2D8;
  --color-seafoam: #A3D9C1;
  --color-steel: #B8DDE9;
  
  /* Typography */
  --font-heading: 'Inter', 'Work Sans', 'Montserrat', sans-serif;
  --font-body: 'Nunito', sans-serif;
  --font-label: 'Quicksand', sans-serif;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-xxl: 4rem;
  
  /* Borders */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-round: 50%;
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(75, 91, 99, 0.1);
  --shadow-md: 0 4px 8px rgba(75, 91, 99, 0.15);
  --shadow-lg: 0 8px 16px rgba(75, 91, 99, 0.2);
  
  /* Transitions */
  --transition-fast: 0.3s ease;
  --transition-smooth: 0.5s ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--color-slate);
  background-color: var(--color-white);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-slate);
  line-height: 1.2;
  margin-bottom: var(--space-md);
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
}

h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 600;
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
}

h4 {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}

p {
  margin-bottom: var(--space-md);
}

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

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

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

/* Header Styles */
.site-header {
  background: linear-gradient(135deg, var(--color-aqua) 0%, var(--color-steel) 100%);
  padding: var(--space-md) var(--space-lg);
  box-shadow: var(--shadow-sm);
  position: relative;
  z-index: 1000;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: nowrap;
  position: relative;
}

nav {
  display: block;
}

.brand-name {
  font-family: var(--font-heading);
  font-size: clamp(1rem, 2vw, 1.75rem);
  font-weight: 700;
  color: var(--color-slate);
  text-decoration: none;
  transition: transform var(--transition-fast);
}

.brand-name:hover {
  transform: scale(1.05);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 15px;
  align-items: center;
  flex-wrap: wrap;
}

.nav-menu li a {
  color: var(--color-slate);
  font-weight: 500;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.nav-menu li a:hover {
  background-color: rgba(255, 255, 255, 0.3);
}

.burger-button {
  display: none;
  background: transparent;
  border: 2px solid var(--color-slate);
  border-radius: var(--radius-md);
  padding: var(--space-sm);
  cursor: pointer;
  flex-direction: column;
  gap: 4px;
  width: 40px;
  height: 40px;
  justify-content: center;
  align-items: center;
  order: 999;
  z-index: 1001;
  position: relative;
}

.burger-line {
  width: 24px;
  height: 2px;
  background-color: var(--color-slate);
  transition: all var(--transition-fast);
  border-radius: 2px;
}

.burger-button.active .burger-line:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.burger-button.active .burger-line:nth-child(2) {
  opacity: 0;
}

.burger-button.active .burger-line:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* Main Content */
main {
  min-height: calc(100vh - 200px);
  padding: var(--space-lg) var(--space-md);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* Hero Section */
.hero-section {
  background: linear-gradient(135deg, var(--color-aqua) 0%, var(--color-seafoam) 100%);
  padding: var(--space-xxl) var(--space-md);
  text-align: center;
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-xl);
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
  animation: ripple 15s infinite;
}

@keyframes ripple {
  0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.5; }
  50% { transform: translate(10%, 10%) scale(1.1); opacity: 0.8; }
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-title {
  color: var(--color-slate);
  margin-bottom: var(--space-lg);
  text-shadow: 0 2px 4px rgba(255,255,255,0.5);
}

.hero-description {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--color-slate);
  max-width: 800px;
  margin: 0 auto var(--space-lg);
}

.cta-button {
  display: inline-block;
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: all var(--transition-fast);
  border: none;
  cursor: pointer;
  font-size: 1.1rem;
  box-shadow: var(--shadow-md);
}

.cta-button:hover {
  background: var(--color-seafoam);
  color: var(--color-slate);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.cta-buttons-group {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 2rem;
}

/* Section Styles */
.content-section {
  margin-bottom: var(--space-xxl);
  padding: var(--space-xl) 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-xl);
  position: relative;
  padding-bottom: var(--space-md);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-aqua), var(--color-seafoam));
  border-radius: var(--radius-sm);
}

/* Grid Layouts */
.grid-two {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-lg);
}

.grid-three {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-lg);
}

/* Card Components */
.feature-card {
  background: var(--color-white);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  border: 1px solid var(--color-aqua);
}

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

.card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
}

.card-title {
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.card-text {
  color: var(--color-slate);
  line-height: 1.7;
}

/* Banner Section */
.banner-section {
  margin: var(--space-xl) 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.banner-image {
  width: 100%;
  height: 400px;
  object-fit: cover;
  display: block;
}

/* Product Cards */
.product-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-fast);
  border: 1px solid var(--color-aqua);
}

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

.product-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
}

.product-info {
  padding: var(--space-lg);
}

.product-title {
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.product-price {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin: var(--space-md) 0;
}

.product-description {
  color: var(--color-slate);
  margin-bottom: var(--space-md);
}

/* Filter Type Cards */
.filter-type-card {
  background: linear-gradient(135deg, var(--color-white) 0%, var(--color-aqua) 100%);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-lg);
  box-shadow: var(--shadow-md);
  border-left: 4px solid var(--color-seafoam);
}

.filter-type-title {
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.pros-cons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-md);
  margin: var(--space-md) 0;
}

.pros-list, .cons-list {
  list-style: none;
  padding: var(--space-md);
  border-radius: var(--radius-md);
}

.pros-list {
  background: rgba(163, 217, 193, 0.2);
}

.cons-list {
  background: rgba(232, 226, 216, 0.3);
}

.pros-list li, .cons-list li {
  padding: var(--space-xs) 0;
  position: relative;
  padding-left: var(--space-lg);
}

.pros-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: bold;
}

.cons-list li::before {
  content: '×';
  position: absolute;
  left: 0;
  color: #d32f2f;
  font-weight: bold;
}

.rating-badge {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  background: var(--color-steel);
  color: var(--color-slate);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  margin: var(--space-sm) var(--space-sm) var(--space-sm) 0;
}

.rating-badges-container {
  margin-top: 1.5rem;
}

/* Installation Guide */
.installation-step {
  background: var(--color-white);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-lg);
  border-left: 4px solid var(--color-steel);
  box-shadow: var(--shadow-sm);
}

.step-number {
  display: inline-block;
  width: 40px;
  height: 40px;
  background: var(--color-seafoam);
  color: var(--color-slate);
  border-radius: var(--radius-round);
  text-align: center;
  line-height: 40px;
  font-weight: bold;
  margin-right: var(--space-md);
  margin-bottom: var(--space-sm);
}

/* Maintenance Checklist */
.checklist-item {
  display: flex;
  align-items: flex-start;
  padding: var(--space-md);
  background: var(--color-white);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-sm);
  box-shadow: var(--shadow-sm);
}

.checklist-item input[type="checkbox"] {
  margin-right: var(--space-md);
  width: 20px;
  height: 20px;
  cursor: pointer;
}

/* Replacement Meter */
.replacement-meter {
  background: var(--color-white);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  margin: var(--space-lg) 0;
}

.meter-bar {
  width: 100%;
  height: 30px;
  background: var(--color-sand);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin: var(--space-md) 0;
  position: relative;
}

.meter-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-seafoam), var(--color-steel));
  transition: width var(--transition-smooth);
  border-radius: var(--radius-md);
  width: 0%;
}

.meter-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  color: var(--color-slate);
  margin-top: var(--space-sm);
}

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

.large-margin {
  margin-bottom: 2rem;
}

.clickable-card {
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.clickable-card:hover {
  transform: translateY(-5px);
}

.diagram-icon {
  font-size: 3rem;
  color: var(--color-primary);
  margin-bottom: 1rem;
  display: block;
}

.filter-result {
  display: none;
  margin-top: 2rem;
  text-align: center;
  padding: 2rem;
  background: var(--color-aqua);
  border-radius: var(--radius-lg);
}

.meter-status {
  margin-top: 1rem;
}

.popular-pages-section {
  margin-top: 3rem;
}

/* Contact Form */
.contact-form {
  max-width: 600px;
  margin: 0 auto;
  background: var(--color-white);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--space-sm);
  color: var(--color-slate);
  font-weight: 500;
  font-family: var(--font-label);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-md);
  border: 2px solid var(--color-aqua);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: border-color var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-seafoam);
}

.form-textarea {
  resize: vertical;
  min-height: 150px;
}

.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  margin: var(--space-lg) 0;
}

.checkbox-group input[type="checkbox"] {
  margin-top: 4px;
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.checkbox-label {
  font-size: 0.9rem;
  color: var(--color-slate);
}
.footer-section a{
    color: white;
}

.submit-button {
  width: 100%;
  padding: var(--space-md);
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius-md);
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-fast);
  margin-top: var(--space-md);
}

.submit-button:hover {
  background: var(--color-seafoam);
  color: var(--color-slate);
}

/* Google Maps */
.map-container {
  width: 100%;
  height: 400px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  margin: var(--space-lg) 0;
}

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

/* Footer */
.site-footer {
  background: linear-gradient(135deg, var(--color-slate) 0%, var(--color-primary) 100%);
  color: var(--color-white);
  padding: var(--space-xl) var(--space-lg);
  margin-top: var(--space-xxl);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
}

.footer-section h3 {
  color: var(--color-white);
  margin-bottom: var(--space-md);
}

.footer-menu {
  list-style: none;
}

.footer-menu li {
  margin-bottom: var(--space-sm);
}

.footer-menu a {
  color: var(--color-aqua);
  transition: color var(--transition-fast);
}

.footer-menu a:hover {
  color: var(--color-seafoam);
}

.footer-bottom {
  text-align: center;
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  font-size: 0.9rem;
}

/* Privacy Popup */
.privacy-popup {
  display: none;
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--color-white);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  max-width: 400px;
  z-index: 10000;
  border: 2px solid var(--color-aqua);
}

.privacy-popup.active {
  display: block;
  animation: slideInUp var(--transition-fast);
}

@keyframes slideInUp {
  from {
    transform: translateY(100px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.popup-content {
  margin-bottom: var(--space-md);
}

.popup-buttons {
  display: flex;
  gap: var(--space-md);
}

.popup-button {
  flex: 1;
  padding: var(--space-sm) var(--space-md);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-weight: 500;
  transition: background var(--transition-fast);
}

.accept-button {
  background: var(--color-primary);
  color: var(--color-white);
}

.accept-button:hover {
  background: var(--color-seafoam);
  color: var(--color-slate);
}

.decline-button {
  background: var(--color-sand);
  color: var(--color-slate);
}

.decline-button:hover {
  background: var(--color-aqua);
}

/* Thank You Page */
.thank-you-section {
  text-align: center;
  padding: var(--space-xxl) var(--space-md);
  background: linear-gradient(135deg, var(--color-aqua) 0%, var(--color-seafoam) 100%);
  border-radius: var(--radius-lg);
  margin: var(--space-xl) 0;
}

.thank-you-icon {
  font-size: 4rem;
  margin-bottom: var(--space-lg);
}

/* 404 Page */
.error-section {
  text-align: center;
  padding: var(--space-xxl) var(--space-md);
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.error-code {
  font-size: 6rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.error-message {
  font-size: 1.5rem;
  color: var(--color-slate);
  margin-bottom: var(--space-xl);
}

/* Date Display */
.date {
  font-weight: 600;
  color: var(--color-slate);
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: calc(100% + var(--space-sm));
    right: 0;
    width: 280px;
    max-width: calc(100vw - 2rem);
    flex-direction: column;
    gap: 0;
    margin-top: 0;
    padding: var(--space-md) 0;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    border: 2px solid var(--color-aqua);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transform: translateY(-10px) scale(0.95);
    transition: all var(--transition-smooth);
  }
  
  .nav-menu.active {
      position: relative;
      left: 7%;
      display: flex;
    max-height: 500px;
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  
  .nav-menu li {
    width: 100%;
    border-bottom: 1px solid rgba(217, 240, 247, 0.5);
  }
  
  .nav-menu li:last-child {
    border-bottom: none;
  }
  
  .nav-menu li a {
    display: block;
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    border-radius: 0;
    font-size: 1rem;
    text-align: left;
  }
  
  .nav-menu li a:hover {
    background-color: var(--color-aqua);
    color: var(--color-slate);
  }
  
  .burger-button {
    display: flex;
  }
  
  .site-header {
    position: relative;
  }
  
  nav {
    position: absolute;
    top: 100%;
    right: var(--space-md);
    width: auto;
  }
  
  .header-container {
    justify-content: space-between;
    position: relative;
    flex-wrap: nowrap;
  }
  
  .grid-two,
  .grid-three {
    grid-template-columns: 1fr;
  }
  
  .hero-section {
    padding: var(--space-xl) var(--space-md);
  }
  
  .privacy-popup {
    max-width: calc(100% - 40px);
    right: 20px;
    left: 20px;
  }
  
  .footer-container {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }
  
  .container {
    padding: 0 var(--space-sm);
  }
  
  main {
    padding: var(--space-md) var(--space-sm);
  }
  
  .hero-section {
    padding: var(--space-lg) var(--space-sm);
  }
  
  .contact-form {
    padding: var(--space-md);
  }
  
  .banner-image {
    height: 250px;
  }
}

@media (max-width: 320px) {
  html {
    font-size: 12px;
  }
  
  .brand-name {
    font-size: 1rem;
  }
  
  .burger-button {
    width: 32px;
    height: 32px;
  }
  
  .burger-line {
    width: 18px;
  }
}

/* Water Animation Effects */
.water-drop {
  position: relative;
  display: inline-block;
}

.water-drop::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-aqua), transparent);
  animation: dropFall 2s infinite;
}

@keyframes dropFall {
  0% {
    opacity: 0;
    transform: translateX(-50%) translateY(0);
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    transform: translateX(-50%) translateY(20px);
  }
}

/* Before/After Slider */
.comparison-slider {
  position: relative;
  width: 100%;
  height: 400px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  margin: var(--space-lg) 0;
}

.comparison-image {
  position: absolute;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.slider-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--color-white);
  cursor: ew-resize;
  z-index: 10;
  box-shadow: var(--shadow-lg);
}

.slider-handle::before {
  content: '◀ ▶';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--color-white);
  padding: var(--space-sm);
  border-radius: var(--radius-round);
  font-size: 0.8rem;
  box-shadow: var(--shadow-md);
}