:root {
  /* Color Palette - Neutral with Retro & Eco-Minimalist accents */
  --color-bg-primary: #f8f7f2;
  --color-bg-secondary: #eae6db;
  --color-bg-tertiary: #dfd8c8;
  --color-bg-accent: #f3efe6;
  
  --color-text-primary: #333333;
  --color-text-secondary: #5c5c5c;
  --color-text-light: #ffffff;
  --color-text-accent: #7d6e55;
  
  --color-primary: #8c7c64;
  --color-primary-dark: #635843;
  --color-secondary: #a6af96;
  --color-secondary-dark: #7c8570;
  --color-accent: #d4ba98;
  --color-accent-dark: #b39774;
  
  --color-success: #7aa678;
  --color-error: #d37676;
  --color-warning: #e0bd7a;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 8rem;
  
  /* Typography */
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  
  /* Border Radius */
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.1);
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Container widths */
  --container-max-width: 1280px;
  --container-padding: 1.5rem;
}

/* Base Styles */
html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  line-height: 1.6;
  margin: 0;
  padding: 0;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.3;
  margin-top: 0;
  color: var(--color-text-primary);
}

h1 {
  font-size: 3rem;
  margin-bottom: 2rem;
}

h2 {
  font-size: 2.25rem;
  margin-bottom: 1.5rem;
}

h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

p {
  margin: 0 0 var(--spacing-md);
}

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

a:hover, a:focus {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

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

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

section {
  padding: var(--spacing-lg) 0;
  position: relative;
}

section h2 {
  text-align: center;
  position: relative;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-sm);
}

section h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 3px;
  background-color: var(--color-accent);
  border-radius: var(--border-radius-sm);
}

.section-desc {
  text-align: center;
  max-width: 800px;
  margin: -1rem auto var(--spacing-lg);
  color: var(--color-text-secondary);
}

/* Buttons */
.btn, button, input[type='submit'] {
  display: inline-block;
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 1rem;
  padding: 0.75rem 2rem;
  border-radius: var(--border-radius-md);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
  line-height: 1.4;
  border: none;
}

.btn:hover, button:hover, input[type='submit']:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  text-decoration: none;
}

.btn:active, button:active, input[type='submit']:active {
  transform: translateY(0);
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-text-light);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  color: var(--color-text-light);
}

.btn-secondary {
  background-color: var(--color-secondary);
  color: var(--color-text-light);
}

.btn-secondary:hover {
  background-color: var(--color-secondary-dark);
  color: var(--color-text-light);
}

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

.btn-outline:hover {
  background-color: var(--color-primary);
  color: var(--color-text-light);
}

/* Read More links */
.read-more {
  font-weight: 500;
  position: relative;
  display: inline-block;
  color: var(--color-primary);
  padding-right: 24px;
  transition: all var(--transition-normal);
}

.read-more::after {
  content: '→';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  transition: transform var(--transition-normal);
}

.read-more:hover {
  color: var(--color-primary-dark);
}

.read-more:hover::after {
  transform: translate(5px, -50%);
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: var(--color-bg-primary);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  height: 70px;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.logo:hover {
  color: var(--color-primary-dark);
  text-decoration: none;
}

.main-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-list li {
  margin-left: var(--spacing-md);
}

.nav-list a {
  font-family: var(--font-heading);
  font-weight: 500;
  color: var(--color-text-primary);
  text-decoration: none;
  padding: 0.5rem 0;
  position: relative;
}

.nav-list a:after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-normal);
}

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

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  width: 30px;
  height: 24px;
  position: relative;
  z-index: 1001;
}

.mobile-menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text-primary);
  margin: 5px 0;
  transition: var(--transition-normal);
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 600px;
  display: flex;
  align-items: center;
  padding: 0;
  margin-top: 70px; /* Height of fixed header */
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  color: var(--color-text-light);
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5));
  z-index: 0;
}

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

.hero-content {
  max-width: 800px;
}

.hero h1 {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-md);
  font-size: 3.5rem;
}

.hero p {
  color: var(--color-text-light);
  font-size: 1.25rem;
  margin-bottom: var(--spacing-lg);
}

/* Features Section */
.features {
  background-color: var(--color-bg-primary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.feature-card {
  background-color: var(--color-bg-accent);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.card-image {
  width: 100%;
  height: 250px;
  overflow: hidden;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

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

.card-content {
  padding: var(--spacing-md);
  text-align: center;
}

.card-content h3 {
  margin-bottom: var(--spacing-sm);
  color: var(--color-primary);
}

.card-content p {
  color: var(--color-text-secondary);
}

/* Process Section */
.process {
  background-color: var(--color-bg-secondary);
  position: relative;
  overflow: hidden;
}

.process::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url('image/pattern-eco.jpg');
  background-size: 400px;
  background-repeat: repeat;
  opacity: 0.05;
  z-index: 0;
}

.process .container {
  position: relative;
  z-index: 1;
}

.process-steps {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
}

.process-step {
  display: flex;
  margin-bottom: var(--spacing-lg);
  position: relative;
  z-index: 1;
}

.process-step:last-child {
  margin-bottom: 0;
}

.step-number {
  background-color: var(--color-primary);
  color: var(--color-text-light);
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  flex-shrink: 0;
  margin-right: var(--spacing-md);
}

.step-content {
  background-color: var(--color-bg-accent);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-md);
  flex-grow: 1;
  box-shadow: var(--shadow-sm);
}

.step-content h3 {
  margin-top: 0;
  color: var(--color-primary);
}

/* Statistics Section */
.statistics {
  background-color: var(--color-bg-primary);
  text-align: center;
}

.stats-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.stat-card {
  background-color: var(--color-bg-accent);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

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

.stat-number {
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
  font-family: var(--font-heading);
}

.stat-desc {
  color: var(--color-text-secondary);
  font-size: 1rem;
}

/* Portfolio Section */
.portfolio {
  background-color: var(--color-bg-tertiary);
}

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

.portfolio-item {
  background-color: var(--color-bg-accent);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.portfolio-item:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.portfolio-item .image-container {
  width: 100%;
  height: 220px;
  overflow: hidden;
}

.portfolio-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.portfolio-item:hover img {
  transform: scale(1.05);
}

.portfolio-item h3 {
  margin: var(--spacing-md) 0 var(--spacing-sm);
  padding: 0 var(--spacing-md);
  color: var(--color-primary);
  text-align: center;
}

.portfolio-item p {
  padding: 0 var(--spacing-md) var(--spacing-md);
  color: var(--color-text-secondary);
  margin: 0;
  text-align: center;
}

/* Resources Section */
.resources {
  background-color: var(--color-bg-primary);
}

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

.resource-card {
  background-color: var(--color-bg-accent);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal);
}

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

.resource-card h3 {
  color: var(--color-primary);
  margin-top: 0;
  text-align: center;
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--color-accent);
}

.resource-card ul {
  padding-left: 1.5rem;
  margin: 0;
}

.resource-card li {
  margin-bottom: var(--spacing-sm);
}

.resource-card li:last-child {
  margin-bottom: 0;
}

.resource-card a {
  color: var(--color-primary);
  text-decoration: none;
  transition: all var(--transition-fast);
  position: relative;
}

.resource-card a:hover {
  color: var(--color-primary-dark);
}

.resource-card a::after {
  content: '→';
  opacity: 0;
  margin-left: 5px;
  transition: all var(--transition-fast);
}

.resource-card a:hover::after {
  opacity: 1;
  margin-left: 8px;
}

/* Case Studies Section */
.case-studies {
  background-color: var(--color-bg-secondary);
}

.studies-accordion {
  max-width: 900px;
  margin: var(--spacing-lg) auto 0;
}

.accordion-item {
  background-color: var(--color-bg-accent);
  border-radius: var(--border-radius-md);
  margin-bottom: var(--spacing-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.accordion-header {
  padding: var(--spacing-md);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--color-bg-tertiary);
  transition: background-color var(--transition-fast);
}

.accordion-header:hover {
  background-color: var(--color-accent);
}

.accordion-header h3 {
  margin: 0;
  font-size: 1.25rem;
  color: var(--color-text-primary);
}

.accordion-icon {
  font-size: 1.5rem;
  font-weight: 700;
  transition: transform var(--transition-fast);
}

.accordion-item.active .accordion-icon {
  transform: rotate(45deg);
}

.accordion-content {
  padding: 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow), padding var(--transition-slow);
}

.accordion-item.active .accordion-content {
  max-height: 1000px;
  padding: var(--spacing-md);
}

.case-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
}

.case-image {
  width: 100%;
  height: 300px;
  overflow: hidden;
  border-radius: var(--border-radius-md);
}

.case-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.case-text {
  flex-grow: 1;
}

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

.contact-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.contact-form-wrapper {
  background-color: var(--color-bg-accent);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-md);
}

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text-primary);
  font-weight: 500;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--color-bg-tertiary);
  border-radius: var(--border-radius-md);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  transition: border-color var(--transition-fast);
  font-family: var(--font-body);
}

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

.contact-info {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
}

.info-item {
  background-color: var(--color-bg-accent);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-sm);
}

.info-item h3 {
  margin-top: 0;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.info-item p {
  margin: 0;
  color: var(--color-text-secondary);
}

/* Footer */
.site-footer {
  background-color: var(--color-primary-dark);
  color: var(--color-text-light);
  padding-top: var(--spacing-lg);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.footer-logo a {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-text-light);
  text-decoration: none;
  display: block;
  margin-bottom: var(--spacing-sm);
}

.footer-logo p {
  color: var(--color-bg-secondary);
  margin: 0;
}

.footer-nav h3,
.footer-legal h3,
.footer-social h3 {
  color: var(--color-text-light);
  margin-top: 0;
  margin-bottom: var(--spacing-md);
  font-size: 1.25rem;
  position: relative;
  padding-bottom: var(--spacing-xs);
}

.footer-nav h3::after,
.footer-legal h3::after,
.footer-social h3::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 2px;
  background-color: var(--color-accent);
  border-radius: var(--border-radius-sm);
}

.footer-nav ul,
.footer-legal ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-nav li,
.footer-legal li {
  margin-bottom: var(--spacing-sm);
}

.footer-nav a,
.footer-legal a {
  color: var(--color-bg-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-nav a:hover,
.footer-legal a:hover {
  color: var(--color-text-light);
  text-decoration: underline;
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.social-links a {
  color: var(--color-bg-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
  margin-right: var(--spacing-md);
}

.social-links a:hover {
  color: var(--color-text-light);
  text-decoration: underline;
}

.footer-bottom {
  padding: var(--spacing-md) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
}

.footer-bottom p {
  margin: 0;
  color: var(--color-bg-secondary);
  font-size: 0.875rem;
}

/* Success Page */
.success-page {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  text-align: center;
  padding: var(--spacing-md);
}

.success-page h1 {
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

.success-page p {
  margin-bottom: var(--spacing-md);
  max-width: 600px;
}

/* Terms and Privacy Pages */
.terms-page,
.privacy-page {
  padding-top: 100px;
}

.terms-page h1,
.privacy-page h1 {
  margin-bottom: var(--spacing-lg);
}

.terms-content,
.privacy-content {
  max-width: 800px;
  margin: 0 auto;
}

.terms-content h2,
.privacy-content h2 {
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  color: var(--color-primary);
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes drawBorder {
  from {
    width: 0;
  }
  to {
    width: 100%;
  }
}

.fade-in {
  animation: fadeIn var(--transition-normal) forwards;
}

.scale-in {
  animation: scaleIn var(--transition-normal) forwards;
}

/* Media Queries */
@media (max-width: 1024px) {
  h1 {
    font-size: 2.5rem;
  }
  
  h2 {
    font-size: 2rem;
  }
  
  .hero {
    min-height: 500px;
  }
  
  .contact-container {
    grid-template-columns: 1fr;
  }
  
  .contact-info {
    grid-template-columns: 1fr 1fr;
  }
  
  .features-grid,
  .portfolio-grid,
  .resources-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }
  
  .case-content {
    flex-direction: column;
  }
  
  .case-image {
    width: 100%;
    max-width: 100%;
  }
}

@media (max-width: 768px) {
  h1 {
    font-size: 2.25rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
  
  .nav-list {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    background-color: var(--color-bg-primary);
    flex-direction: column;
    box-shadow: var(--shadow-md);
    padding: var(--spacing-md) 0;
  }
  
  .nav-list.open {
    display: flex;
  }
  
  .nav-list li {
    margin: 0;
  }
  
  .nav-list a {
    display: block;
    padding: var(--spacing-sm) var(--container-padding);
    border-bottom: 1px solid var(--color-bg-secondary);
  }
  
  .nav-list a:after {
    display: none;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .hero {
    min-height: 400px;
  }
  
  .contact-info {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .features-grid,
  .portfolio-grid,
  .resources-grid {
    grid-template-columns: 1fr;
  }
  
  .process-step {
    flex-direction: column;
  }
  
  .step-number {
    margin-right: 0;
    margin-bottom: var(--spacing-sm);
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  .hero {
    min-height: 350px;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .btn, button, input[type='submit'] {
    width: 100%;
  }
}