/* CSS Custom Properties */
:root {
  --color-primary: #3b82f6;
  --color-primary-dark: #2563eb;
  --color-secondary: #10b981;
  --color-secondary-dark: #059669;
  --color-text: #1f2937;
  --color-text-light: #6b7280;
  --color-bg: #ffffff;
  --color-surface: #f9fafb;
  --color-border: #e5e7eb;
  --color-border-light: #f3f4f6;
  --blur-strength: 10px;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --radius: 0.5rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --transition: all 0.2s ease-in-out;
}

/* Dark mode variables */
.dark {
  --color-text: #f9fafb;
  --color-text-light: #d1d5db;
  --color-bg: #111827;
  --color-surface: #1f2937;
  --color-border: #374151;
  --color-border-light: #4b5563;
}

/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: var(--transition);
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--color-primary);
  color: white;
  padding: 8px;
  text-decoration: none;
  border-radius: var(--radius);
  z-index: 1000;
  transition: var(--transition);
}

.skip-link:focus {
  top: 6px;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(var(--blur-strength));
  border-bottom: 1px solid var(--color-border-light);
  transition: var(--transition);
}

.dark .header {
  background: rgba(17, 24, 39, 0.8);
}

.header-scrolled {
  box-shadow: var(--shadow);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 1.25rem;
  color: var(--color-text);
  text-decoration: none;
}

.logo-icon {
  width: 32px;
  height: 32px;
  color: var(--color-primary);
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-link {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: var(--transition);
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Buttons */
.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: white;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  display: inline-block;
  text-align: center;
}

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

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  padding: 0.75rem 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: var(--transition);
  display: inline-block;
}

.btn-secondary:hover {
  background: var(--color-surface);
  border-color: var(--color-primary);
}

.theme-toggle {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.5rem;
  cursor: pointer;
  transition: var(--transition);
  color: var(--color-text);
}

.theme-toggle:hover {
  background: var(--color-surface);
}

.theme-icon {
  width: 20px;
  height: 20px;
}

/* Language switcher */
.language-switcher {
  display: flex;
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.lang-btn {
  background: none;
  border: none;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  color: var(--color-text-light);
}

.lang-btn.active {
  background: var(--color-primary);
  color: white;
}

.lang-btn:hover:not(.active) {
  background: var(--color-bg);
  color: var(--color-text);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle span {
  width: 20px;
  height: 2px;
  background: var(--color-text);
  transition: var(--transition);
}

/* Scroll progress */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  z-index: 101;
  transition: width 0.1s ease;
}

/* Hero section */
.hero {
  padding: 8rem 0 4rem;
  background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-surface) 100%);
}

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

.eyebrow {
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--color-text), var(--color-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtext {
  font-size: 1.25rem;
  color: var(--color-text-light);
  margin-bottom: 2rem;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
}

.trust-chips {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.chip {
  background: var(--color-surface);
  color: var(--color-text);
  padding: 0.5rem 1rem;
  border-radius: 2rem;
  font-size: 0.875rem;
  font-weight: 500;
  border: 1px solid var(--color-border);
}

.analytics-card {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(var(--blur-strength));
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  padding: 2rem;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s ease;
}

.dark .analytics-card {
  background: rgba(31, 41, 55, 0.8);
}

.analytics-card.animate-in {
  opacity: 1;
  transform: translateY(0);
}

.analytics-card h3 {
  margin-bottom: 1.5rem;
  color: var(--color-text);
}

.metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.metric {
  text-align: center;
}

.metric-value {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.25rem;
}

.metric-label {
  font-size: 0.875rem;
  color: var(--color-text-light);
}

/* Sections */
section {
  padding: 4rem 0;
}

section h2 {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 3rem;
  color: var(--color-text);
}

/* Services */
.services {
  background: var(--color-surface);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.service-card {
  background: var(--color-bg);
  padding: 2rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow);
  transition: var(--transition);
  opacity: 0;
  transform: translateY(20px);
}

.service-card.animate-in {
  opacity: 1;
  transform: translateY(0);
}

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

.service-card h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--color-text);
}

.service-card p {
  color: var(--color-text-light);
  line-height: 1.6;
}

/* Outcomes */
.outcomes {
  text-align: center;
}

.outcomes-intro {
  font-size: 1.25rem;
  color: var(--color-text-light);
  margin-bottom: 2rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.outcomes-chips {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Process */
.process-timeline {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  position: relative;
}

.process-step {
  text-align: center;
  padding: 2rem;
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  position: relative;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s ease;
}

.process-step.animate-in {
  opacity: 1;
  transform: translateY(0);
}

.process-step h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--color-primary);
}

.process-step p {
  color: var(--color-text-light);
  line-height: 1.6;
}

/* Tech stack */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
}

.tech-item {
  background: var(--color-surface);
  padding: 1.5rem;
  border-radius: var(--radius);
  text-align: center;
  font-weight: 500;
  border: 1px solid var(--color-border);
  transition: var(--transition);
  opacity: 0;
  transform: translateY(20px);
}

.tech-item.animate-in {
  opacity: 1;
  transform: translateY(0);
}

.tech-item:hover {
  background: var(--color-primary);
  color: white;
  transform: translateY(-2px);
}

/* FAQ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 1.5rem 0;
  text-align: left;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
}

.faq-question:hover {
  color: var(--color-primary);
}

.faq-icon {
  width: 20px;
  height: 20px;
  transition: var(--transition);
}

.faq-item.faq-open .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-item.faq-open .faq-answer {
  max-height: 200px;
}

.faq-answer p {
  padding: 0 0 1.5rem 0;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* Contact */
.contact {
  background: var(--color-surface);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.contact-info h2 {
  text-align: left;
  margin-bottom: 1rem;
}

.contact-info p {
  color: var(--color-text-light);
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.contact-details {
  margin-bottom: 2rem;
}

.contact-details p {
  margin-bottom: 0.5rem;
}

.contact-details a {
  color: var(--color-primary);
  text-decoration: none;
}

.contact-details a:hover {
  text-decoration: underline;
}

.map-placeholder {
  margin-top: 2rem;
}

.map-thumbnail {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
  color: var(--color-text-light);
}

/* Form */
.contact-form {
  background: var(--color-bg);
  padding: 2rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow);
}

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

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

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1rem;
  transition: var(--transition);
  background: var(--color-bg);
  color: var(--color-text);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  cursor: pointer;
  font-size: 0.875rem;
  line-height: 1.4;
}

.checkbox-label input[type="checkbox"] {
  width: auto;
  margin: 0;
}

.honeypot {
  position: absolute;
  left: -9999px;
  opacity: 0;
}

.form-message {
  margin-top: 1rem;
}

.success-message {
  background: #d1fae5;
  color: #065f46;
  padding: 1rem;
  border-radius: var(--radius);
  border: 1px solid #a7f3d0;
}

.error-message {
  background: #fee2e2;
  color: #991b1b;
  padding: 1rem;
  border-radius: var(--radius);
  border: 1px solid #fca5a5;
}

/* Footer */
.footer {
  background: var(--color-text);
  color: white;
  padding: 3rem 0 1rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
  margin-bottom: 1rem;
  color: white;
}

.footer-section p {
  color: #d1d5db;
  margin-bottom: 0.5rem;
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: 0.5rem;
}

.footer-section a {
  color: #d1d5db;
  text-decoration: none;
  transition: var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid #374151;
  padding-top: 1rem;
  text-align: center;
  color: #9ca3af;
}

/* Responsive design */
@media (max-width: 768px) {
  .nav {
    position: fixed;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
    padding: 2rem;
    transform: translateY(-100%);
    transition: transform 0.3s ease;
  }

  .nav-open {
    transform: translateY(0);
  }

  .nav-list {
    flex-direction: column;
    gap: 1rem;
  }

  .nav-toggle {
    display: flex;
  }

  .hero-content {
    grid-template-columns: 1fr;
    gap: 2rem;
    text-align: center;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero-actions {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
  }

  .contact-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .metrics {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .process-timeline {
    grid-template-columns: 1fr;
  }

  .tech-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 0.75rem;
  }

  .hero {
    padding: 6rem 0 3rem;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  section {
    padding: 3rem 0;
  }

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

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

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}

/* Focus styles */
*:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Print styles */
@media print {
  .header,
  .scroll-progress,
  .contact-form,
  .footer {
    display: none;
  }

  body {
    font-size: 12pt;
    line-height: 1.4;
  }

  h1, h2, h3 {
    page-break-after: avoid;
  }
}