:root {
  /* Colors */
  --primary: #1a365d;
  --secondary: #0f766e;
  --accent: #ea580c;
  --success: #059669;
  --warning: #d97706;
  --error: #dc2626;
  --neutral-50: #fafafa;
  --neutral-100: #f5f5f5;
  --neutral-200: #e5e5e5;
  --neutral-300: #d4d4d4;
  --neutral-400: #a3a3a3;
  --neutral-500: #737373;
  --neutral-600: #525252;
  --neutral-700: #404040;
  --neutral-800: #262626;
  --neutral-900: #171717;
  
  /* Typography */
  --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  
  /* Border radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  font-weight: var(--font-weight-normal);
  line-height: 1.5;
  color: var(--neutral-700);
  background-color: var(--neutral-50);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  color: var(--primary);
  margin-bottom: var(--space-4);
}

h1 {
  font-size: 3rem;
  font-weight: var(--font-weight-bold);
}

h2 {
  font-size: 2.25rem;
}

h3 {
  font-size: 1.875rem;
}

h4 {
  font-size: 1.5rem;
}

h5 {
  font-size: 1.25rem;
}

h6 {
  font-size: 1.125rem;
}

p {
  margin-bottom: var(--space-4);
  line-height: 1.6;
}

a {
  color: var(--secondary);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

a:focus {
  outline: 2px solid var(--secondary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

ul, ol {
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
}

li {
  margin-bottom: var(--space-2);
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

/* Centered Sections */
.centered-section {
  text-align: center;
}

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

.centered-section .about-grid,
.centered-section .services-grid,
.centered-section .products-grid,
.centered-section .features-grid,
.centered-section .team-grid,
.centered-section .case-studies-grid {
  text-align: center;
}

.centered-section .methodology-content {
  text-align: left;
}

/* Header */
.header {
  background: var(--neutral-50);
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--neutral-200);
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.logo-icon {
  height: 48px;
  width: 48px;
  transition: transform 0.2s ease;
}

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

.brand-name {
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  color: var(--primary);
  transition: color 0.2s ease;
}

.logo-brand:hover .brand-name {
  color: var(--secondary);
}

/* Hero Section */
.hero {
  padding: var(--space-20) 0;
  background: linear-gradient(135deg, var(--neutral-50) 0%, var(--neutral-100) 100%);
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.hero-content h1 {
  margin-bottom: var(--space-6);
  color: var(--primary);
}

.hero-content p {
  font-size: 1.25rem;
  color: var(--neutral-600);
  margin-bottom: var(--space-8);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

.stat {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 2.5rem;
  font-weight: var(--font-weight-bold);
  color: var(--secondary);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--neutral-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hero-image .image-placeholder {
  background: var(--neutral-200);
  border-radius: var(--radius-xl);
  height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--neutral-500);
  font-weight: var(--font-weight-medium);
  box-shadow: var(--shadow-lg);
}

/* Product Pricing */
.product-price {
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
  color: var(--secondary);
  margin: var(--space-4) 0;
  text-align: center;
}

/* Section Headers */
.section-header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section-header h2 {
  margin-bottom: var(--space-4);
}

.section-header p {
  font-size: 1.25rem;
  color: var(--neutral-600);
  max-width: 600px;
  margin: 0 auto;
}

/* About Section */
.about {
  padding: var(--space-24) 0;
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-8);
}

.about-card {
  text-align: center;
  padding: var(--space-8);
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.about-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.about-card:focus-within {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  outline: 2px solid var(--secondary);
  outline-offset: 2px;
}

.card-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-6);
  background: var(--neutral-100);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.3s ease;
}

.about-card:hover .card-icon {
  background: var(--secondary);
}

.about-card:hover .card-icon svg {
  color: white;
}

.card-icon svg {
  width: 32px;
  height: 32px;
  transition: color 0.3s ease;
}

/* Services Section */
.services {
  padding: var(--space-24) 0;
  background: var(--neutral-100);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
}

.service-card {
  background: white;
  padding: var(--space-8);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.service-card:focus-within {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  outline: 2px solid var(--secondary);
  outline-offset: 2px;
}

.service-card h3 {
  color: var(--secondary);
  margin-bottom: var(--space-4);
  transition: color 0.2s ease;
}

.service-card:hover h3 {
  color: var(--accent);
}

/* Methodology Section */
.methodology {
  padding: var(--space-24) 0;
}

.methodology-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.methodology-list {
  list-style: none;
  padding: 0;
}

.methodology-list li {
  position: relative;
  padding-left: var(--space-6);
  margin-bottom: var(--space-3);
}

.methodology-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--secondary);
  font-weight: var(--font-weight-bold);
}

.methodology-image .image-placeholder {
  background: var(--neutral-200);
  border-radius: var(--radius-lg);
  height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--neutral-500);
  font-weight: var(--font-weight-medium);
}

/* Products Section */
.products {
  padding: var(--space-24) 0;
  background: var(--neutral-100);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-8);
}

.product-card {
  background: white;
  padding: var(--space-8);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 2px solid transparent;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.product-card:hover {
  border-color: var(--secondary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.product-card:focus-within {
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.product-card h3 {
  color: var(--primary);
  margin-bottom: var(--space-4);
}

.product-features {
  list-style: none;
  padding: 0;
  margin: var(--space-6) 0;
}

.product-features li {
  position: relative;
  padding-left: var(--space-6);
  margin-bottom: var(--space-2);
  color: var(--neutral-600);
}

.product-features li::before {
  content: "●";
  position: absolute;
  left: 0;
  color: var(--accent);
}

.cta-button {
  background: var(--secondary);
  color: white;
  border: none;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  width: 100%;
  font-size: 1rem;
  transition: background-color 0.2s ease, transform 0.1s ease;
}

.cta-button:hover {
  background: var(--accent);
  transform: translateY(-1px);
}

.cta-button:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.cta-button:active {
  transform: translateY(0);
}

.cta-button:disabled {
  background: var(--neutral-400);
  color: var(--neutral-600);
  cursor: not-allowed;
  transform: none;
}

.cta-button:disabled:hover {
  background: var(--neutral-400);
  transform: none;
}

/* Why Choose Section */
.why-choose {
  padding: var(--space-24) 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-8);
}

.feature-item {
  text-align: center;
  padding: var(--space-6);
}

.feature-number {
  display: inline-block;
  width: 60px;
  height: 60px;
  background: var(--secondary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  margin: 0 auto var(--space-4);
}

.feature-item h3 {
  margin-bottom: var(--space-3);
}

/* Team Section */
.team {
  padding: var(--space-24) 0;
  background: var(--neutral-100);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-8);
}

.team-member {
  background: white;
  padding: var(--space-8);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.team-member:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.team-member:focus-within {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  outline: 2px solid var(--secondary);
  outline-offset: 2px;
}

.member-image {
  margin-bottom: var(--space-6);
}

.member-image .image-placeholder {
  background: var(--neutral-200);
  border-radius: 50%;
  width: 120px;
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--neutral-500);
  font-size: 0.875rem;
  margin: 0 auto;
}

.member-role {
  color: var(--secondary);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-2);
}

.member-description {
  color: var(--neutral-600);
  font-size: 0.875rem;
}

/* Case Studies Section */
.case-studies {
  padding: var(--space-24) 0;
}

.case-studies-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: var(--space-8);
}

.case-study-card {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.case-study-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.case-study-card:focus-within {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  outline: 2px solid var(--secondary);
  outline-offset: 2px;
}

.case-study-image .image-placeholder {
  background: var(--neutral-200);
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--neutral-500);
  font-weight: var(--font-weight-medium);
}

.case-study-content {
  padding: var(--space-6);
}

.case-study-stats {
  display: flex;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.stat-highlight {
  background: var(--neutral-100);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: var(--font-weight-semibold);
  color: var(--secondary);
}

/* Contact Section */
.contact {
  padding: var(--space-24) 0;
  background: var(--neutral-100);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.contact-icon {
  width: 48px;
  height: 48px;
  background: white;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}

.contact-icon svg {
  width: 24px;
  height: 24px;
}

.contact-details h3 {
  margin-bottom: var(--space-1);
  font-size: 1.125rem;
}

.contact-details p {
  margin: 0;
  color: var(--neutral-600);
}

.contact-form {
  background: white;
  padding: var(--space-8);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.form-group {
  margin-bottom: var(--space-6);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: var(--space-3);
  border: 1px solid var(--neutral-300);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 1rem;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--secondary);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.1);
  border-radius: var(--radius-md);
}

.submit-button {
  background: var(--secondary);
  color: white;
  border: none;
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  width: 100%;
  font-size: 1rem;
  transition: background-color 0.2s ease, transform 0.1s ease;
}

.submit-button:hover {
  background: var(--accent);
  transform: translateY(-1px);
}

.submit-button:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.submit-button:disabled {
  background: var(--neutral-400);
  cursor: not-allowed;
  transform: none;
}

/* Footer */
.footer {
  background: var(--primary);
  color: white;
  padding: var(--space-16) 0 var(--space-8);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  margin-bottom: var(--space-12);
}

.footer-brand .logo-brand {
  margin-bottom: var(--space-4);
}

.footer-brand .brand-name {
  color: white;
}

.footer-description {
  color: rgba(255, 255, 255, 0.8);
  margin: 0;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-8);
}

.footer-column h4 {
  color: white;
  margin-bottom: var(--space-4);
  font-size: 1.125rem;
}

.footer-column ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-column li {
  margin-bottom: var(--space-2);
}

.footer-column a {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.875rem;
}

.footer-column a:hover {
  color: white;
}

.footer-bottom {
  text-align: center;
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.footer-bottom p {
  color: rgba(255, 255, 255, 0.6);
  margin: 0;
  font-size: 0.875rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .container {
    padding: 0 var(--space-6);
  }
  
  .hero .container {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }
  
  .methodology-content {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }
  
  .footer-links {
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  }
}

@media (max-width: 768px) {
  h1 {
    font-size: 2.5rem;
  }
  
  h2 {
    font-size: 2rem;
  }
  
  .hero-stats {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
  
  .about-grid,
  .services-grid,
  .products-grid,
  .features-grid,
  .team-grid {
    grid-template-columns: 1fr;
  }
  
  .case-studies-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-links {
    grid-template-columns: 1fr;
  }
  
  .feature-number {
    width: 50px;
    height: 50px;
    font-size: 1.25rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-4);
  }
  
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
  
  h3 {
    font-size: 1.5rem;
  }
  
  .hero {
    padding: var(--space-16) 0;
  }
  
  .about, .services, .methodology, .products, .why-choose, .team, .case-studies, .contact {
    padding: var(--space-16) 0;
  }
  
  .section-header {
    margin-bottom: var(--space-12);
  }
  
  .hero-stats {
    gap: var(--space-4);
  }
  
  .stat-number {
    font-size: 2rem;
  }
  
  .about-card,
  .service-card,
  .product-card,
  .team-member {
    padding: var(--space-6);
  }
}