/* ==========================================================================
   AI Health Research Network - Main Stylesheet
   ========================================================================== */

/* CSS Custom Properties (Design Tokens) */
:root {
  /* Colors - Vibrant Healthcare Palette */
  /* Primary: Rich Indigo - Modern, Premium, Trustworthy */
  --color-primary: #4698e5;
  --color-primary-light: #9092ff;
  --color-primary-dark: #4338CA;
  
  /* Accent: Vibrant Emerald - Health, Growth, Vitality */
  --color-accent: #10d493;
  --color-accent-light: #34D399;
  --color-accent-dark: #059669;
  
  /* Secondary: Warm Rose - Compassion, Care, Human Touch */
  --color-secondary: #F43F5E;
  --color-secondary-light: #FB7185;
  --color-secondary-dark: #E11D48;
  
  /* Tertiary: Golden Amber - Innovation, Excellence */
  --color-tertiary: #bbfa69;
  --color-tertiary-light: #61fb24;
  --color-tertiary-dark: #fdd6aa;
  
  /* Neutrals */
  --color-background: #FAFBFC;
  --color-surface: #FFFFFF;
  --color-surface-elevated: #FFFFFF;
  --color-border: #E5E7EB;
  --color-border-light: #F3F4F6;
  
  /* Text */
  --color-text: #111827;
  --color-text-muted: #080803;
  --color-text-light: #d6d7da;
  
  /* Semantic Colors */
  --color-success: #10B981;
  --color-error: #EF4444;
  --color-warning: #F59E0B;
  --color-info: #3B82F6;
  
  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  
  /* 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;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
}

/* ==========================================================================
   Base Styles
   ========================================================================== */

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  margin: 0;
  line-height: 1.2;
  font-weight: 600;
}

p {
  margin: 0;
}

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

@media (min-width: 640px) {
  .container { padding: 0 var(--space-6); }
}

@media (min-width: 1024px) {
  .container { padding: 0 var(--space-8); }
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-balance {
  text-wrap: balance;
}

/* ==========================================================================
   Animations
   ========================================================================== */

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.1; }
  50% { transform: scale(1.1); opacity: 0.15; }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@keyframes countUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
  from { transform: translateX(-100%); }
  to { transform: translateX(0); }
}

.animate-fade-in { animation: fadeIn 0.6s ease forwards; }
.animate-fade-in-up { animation: fadeInUp 0.6s ease forwards; }
.animate-fade-in-down { animation: fadeInDown 0.6s ease forwards; }
.animate-fade-in-left { animation: fadeInLeft 0.6s ease forwards; }
.animate-fade-in-right { animation: fadeInRight 0.6s ease forwards; }
.animate-scale-in { animation: scaleIn 0.5s ease forwards; }
.animate-float { animation: float 3s ease-in-out infinite; }

/* Animation Delays */
.delay-100 { animation-delay: 0.1s; }
.delay-200 { animation-delay: 0.2s; }
.delay-300 { animation-delay: 0.3s; }
.delay-400 { animation-delay: 0.4s; }
.delay-500 { animation-delay: 0.5s; }
.delay-600 { animation-delay: 0.6s; }
.delay-700 { animation-delay: 0.7s; }

/* Initially hidden for animations */
.animate-on-scroll {
  opacity: 0;
}

.animate-on-scroll.is-visible {
  animation: fadeInUp 0.6s ease forwards;
}

/* ==========================================================================
   Header
   ========================================================================== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: all var(--transition-base);
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

@media (min-width: 1024px) {
  .header-inner { height: 80px; }
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--color-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 14px;
  position: relative;
  overflow: hidden;
}

.logo-icon::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--color-accent);
  opacity: 0.2;
  transform: translateY(100%);
  transition: transform var(--transition-base);
}

.logo:hover .logo-icon::after {
  transform: translateY(0);
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-text-main {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.2;
}

.logo-text-sub {
  font-size: 10px;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* Navigation */
.nav {
  display: none;
}

@media (min-width: 1024px) {
  .nav {
    display: flex;
    align-items: center;
    gap: var(--space-1);
  }
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-4);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: var(--space-4);
  right: var(--space-4);
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

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

.nav-link:hover::after {
  transform: scaleX(1);
}

.nav-link .chevron {
  width: 14px;
  height: 14px;
  transition: transform var(--transition-fast);
}

.nav-item:hover .chevron {
  transform: rotate(180deg);
}

/* Dropdown */
.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  padding-top: var(--space-2);
  width: 220px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-fast);
}

.nav-item:hover .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown-inner {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.nav-dropdown-link {
  display: block;
  padding: var(--space-3) var(--space-4);
  font-size: 14px;
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
}

.nav-dropdown-link:hover {
  color: var(--color-text);
  background: var(--color-background);
}

/* Header CTA */
.header-cta {
  display: none;
}

@media (min-width: 1024px) {
  .header-cta { display: block; }
}

/* Mobile Menu Button */
.mobile-menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  color: var(--color-text);
}

@media (min-width: 1024px) {
  .mobile-menu-btn { display: none; }
}

.mobile-menu-btn svg {
  width: 24px;
  height: 24px;
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-surface);
  padding: var(--space-4);
  transform: translateX(100%);
  transition: transform var(--transition-base);
  overflow-y: auto;
}

.mobile-menu.is-open {
  transform: translateX(0);
}

@media (min-width: 1024px) {
  .mobile-menu { display: none; }
}

.mobile-nav-link {
  display: block;
  padding: var(--space-3) var(--space-4);
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-lg);
  transition: background var(--transition-fast);
}

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

.mobile-nav-sub {
  margin-left: var(--space-4);
  margin-top: var(--space-1);
}

.mobile-nav-sub-link {
  display: block;
  padding: var(--space-2) var(--space-4);
  font-size: 14px;
  color: var(--color-text-muted);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
}

.mobile-nav-sub-link:hover {
  color: var(--color-text);
  background: var(--color-background);
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-light);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--color-background);
  border-color: var(--color-text-light);
}

.btn-accent {
  background: var(--color-accent);
  color: white;
}

.btn-accent:hover:not(:disabled) {
  background: var(--color-accent-dark);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  border: 1px solid currentColor;
}

.btn-outline-light {
  background: transparent;
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-outline-light:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.1);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: 16px;
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: 13px;
}

.btn-icon {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast);
}

.btn:hover .btn-icon {
  transform: translateX(4px);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--color-primary);
}

.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  opacity: 0.1;
  animation: pulse 8s ease-in-out infinite;
}

.hero-orb-1 {
  width: 400px;
  height: 400px;
  top: 20%;
  left: 20%;
  background: radial-gradient(circle, var(--color-accent) 0%, transparent 70%);
}

.hero-orb-2 {
  width: 320px;
  height: 320px;
  bottom: 20%;
  right: 20%;
  background: radial-gradient(circle, var(--color-accent) 0%, transparent 70%);
  animation-delay: 2s;
}

.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  padding: var(--space-16) var(--space-4);
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-4);
  margin-bottom: var(--space-8);
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent-light);
  border: 1px solid rgba(52, 211, 153, 0.4);
  border-radius: var(--radius-full);
  background: rgba(16, 185, 129, 0.1);
  opacity: 0;
  animation: fadeInUp 0.6s ease forwards 0.2s;
}

.hero-tag-dot {
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 600;
  color: white;
  line-height: 1.1;
  margin-bottom: var(--space-6);
  opacity: 0;
  animation: fadeInUp 0.8s ease forwards 0.3s;
}

.hero-title-accent {
  color: var(--color-accent);
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: rgba(255, 255, 255, 0.7);
  max-width: 640px;
  margin: 0 auto var(--space-10);
  line-height: 1.6;
  opacity: 0;
  animation: fadeInUp 0.8s ease forwards 0.5s;
}

.hero-ctas {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  opacity: 0;
  animation: fadeInUp 0.8s ease forwards 0.7s;
}

@media (min-width: 640px) {
  .hero-ctas {
    flex-direction: row;
    justify-content: center;
  }
}

.hero-scroll {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: rgba(255, 255, 255, 0.5);
  opacity: 0;
  animation: fadeIn 1s ease forwards 1.2s;
}

.hero-scroll-text {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.hero-scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.5), transparent);
  animation: pulse 2s ease-in-out infinite;
}

/* ==========================================================================
   Page Hero (Interior Pages)
   ========================================================================== */

.page-hero {
  position: relative;
  padding: var(--space-24) 0 var(--space-16);
  background: var(--color-primary);
  overflow: hidden;
}

.page-hero-bg {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 40px 40px;
}

.page-hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
}

.page-hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  color: white;
  margin-bottom: var(--space-4);
}

.page-hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.125rem);
  color: rgba(255, 255, 255, 0.7);
  max-width: 600px;
  margin: 0 auto;
}

/* ==========================================================================
   Stats Section
   ========================================================================== */

.stats {
  padding: var(--space-16) 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

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

.stat-number {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.stat-number .counter {
  display: inline-block;
}

.stat-label {
  font-size: 14px;
  color: var(--color-text-muted);
}

/* ==========================================================================
   Services Section
   ========================================================================== */

.services {
  padding: var(--space-20) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
}

.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.service-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: all var(--transition-base);
}

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

.service-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
  color: white;
}

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

.service-title {
  font-size: 1.25rem;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.service-description {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-5);
}

.service-features {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.service-feature {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 13px;
  color: var(--color-text-muted);
}

.service-feature-icon {
  width: 16px;
  height: 16px;
  color: var(--color-accent);
  flex-shrink: 0;
}

/* ==========================================================================
   Research Areas Section
   ========================================================================== */

.research-areas {
  padding: var(--space-20) 0;
  background: var(--color-background);
}

.research-areas-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 640px) {
  .research-areas-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .research-areas-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.research-area-card {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition: all var(--transition-base);
  overflow: hidden;
}

.research-area-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.research-area-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.research-area-card:hover::before {
  transform: scaleX(1);
}

.research-area-icon {
  font-size: 2rem;
  margin-bottom: var(--space-4);
}

.research-area-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.research-area-count {
  font-size: 13px;
  color: var(--color-text-muted);
}

/* ==========================================================================
   Partners Section
   ========================================================================== */

.partners {
  padding: var(--space-16) 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  overflow: hidden;
}

.partners-header {
  text-align: center;
  margin-bottom: var(--space-10);
}

.partners-title {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
}

.partners-track {
  display: flex;
  animation: scroll 30s linear infinite;
}

@keyframes scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.partners-list {
  display: flex;
  gap: var(--space-12);
  flex-shrink: 0;
  padding: 0 var(--space-6);
}

.partner-logo {
  height: 40px;
  opacity: 0.5;
  filter: grayscale(1);
  transition: all var(--transition-base);
  flex-shrink: 0;
}

.partner-logo:hover {
  opacity: 1;
  filter: grayscale(0);
}

/* ==========================================================================
   CTA Section
   ========================================================================== */

.cta-section {
  padding: var(--space-20) 0;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  position: relative;
  overflow: hidden;
}

.cta-bg {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 40px 40px;
}

.cta-content {
  position: relative;
  z-index: 10;
  text-align: center;
}

.cta-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  color: white;
  margin-bottom: var(--space-4);
}

.cta-subtitle {
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.7);
  max-width: 500px;
  margin: 0 auto var(--space-8);
}

.cta-buttons {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}

@media (min-width: 640px) {
  .cta-buttons {
    flex-direction: row;
    justify-content: center;
  }
}

/* ==========================================================================
   Footer
   ========================================================================== */

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

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
  margin-bottom: var(--space-12);
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

.footer-brand {
  max-width: 300px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.footer-logo-icon {
  width: 36px;
  height: 36px;
  background: white;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-weight: 700;
  font-size: 14px;
}

.footer-logo-text {
  display: flex;
  flex-direction: column;
}

.footer-logo-main {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.2;
}

.footer-logo-sub {
  font-size: 10px;
  color: rgba(255, 255, 255, 0.6);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.footer-description {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.6;
  margin-bottom: var(--space-6);
}

.footer-social {
  display: flex;
  gap: var(--space-3);
}

.footer-social-link {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  color: white;
  transition: all var(--transition-fast);
}

.footer-social-link:hover {
  background: var(--color-accent);
  transform: translateY(-2px);
}

.footer-social-link svg {
  width: 18px;
  height: 18px;
}

.footer-column-title {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-5);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-link {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: white;
}

.footer-newsletter {
  margin-bottom: var(--space-12);
  padding: var(--space-8);
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-xl);
}

.footer-newsletter-title {
  font-size: 1.125rem;
  margin-bottom: var(--space-2);
}

.footer-newsletter-text {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: var(--space-4);
}

.footer-newsletter-form {
  display: flex;
  gap: var(--space-3);
}

.footer-newsletter-input {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
  color: white;
  font-size: 14px;
}

.footer-newsletter-input::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.footer-newsletter-input:focus {
  outline: none;
  border-color: var(--color-accent);
}

.footer-bottom {
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  text-align: center;
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer-copyright {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
}

.footer-legal {
  display: flex;
  gap: var(--space-6);
}

.footer-legal-link {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  transition: color var(--transition-fast);
}

.footer-legal-link:hover {
  color: white;
}

/* ==========================================================================
   Forms
   ========================================================================== */

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

.form-label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.form-label .required {
  color: var(--color-error);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: 14px;
  font-family: inherit;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
}

.form-input.error,
.form-select.error,
.form-textarea.error {
  border-color: var(--color-error);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-light);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2364748b'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
  background-size: 16px;
  padding-right: var(--space-10);
}

.form-error {
  font-size: 13px;
  color: var(--color-error);
  margin-top: var(--space-1);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 640px) {
  .form-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Contact Form Card */
.contact-form-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
}

@media (min-width: 1024px) {
  .contact-form-card {
    padding: var(--space-10);
  }
}

.contact-form-title {
  font-size: 1.5rem;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.contact-form-subtitle {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
}

/* Form Success State */
.form-success {
  text-align: center;
  padding: var(--space-16) var(--space-8);
}

.form-success-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-6);
  background: rgba(5, 150, 105, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-success);
}

.form-success-icon svg {
  width: 32px;
  height: 32px;
}

.form-success-title {
  font-size: 1.5rem;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.form-success-text {
  font-size: 14px;
  color: var(--color-text-muted);
  max-width: 400px;
  margin: 0 auto;
}

/* ==========================================================================
   Contact Info
   ========================================================================== */

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.contact-info-item {
  display: flex;
  gap: var(--space-4);
}

.contact-info-icon {
  width: 48px;
  height: 48px;
  background: rgba(16, 185, 129, 0.1);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  flex-shrink: 0;
}

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

.contact-info-content {
  flex: 1;
}

.contact-info-label {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
}

.contact-info-value {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
}

/* ==========================================================================
   FAQ / Accordion
   ========================================================================== */

.faq-section {
  padding: var(--space-20) 0;
  background: var(--color-background);
}

.accordion {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  max-width: 800px;
  margin: 0 auto;
}

.accordion-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-6);
  background: none;
  border: none;
  text-align: left;
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text);
  cursor: pointer;
  transition: background var(--transition-fast);
}

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

.accordion-trigger svg {
  width: 20px;
  height: 20px;
  color: var(--color-text-muted);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.accordion-item.is-open .accordion-trigger svg {
  transform: rotate(180deg);
}

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

.accordion-item.is-open .accordion-content {
  max-height: 500px;
}

.accordion-content-inner {
  padding: 0 var(--space-6) var(--space-5);
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   Team Section
   ========================================================================== */

.team-section {
  padding: var(--space-20) 0;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .team-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .team-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

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

.team-card-image {
  width: 100%;
  aspect-ratio: 1;
  background: linear-gradient(135deg, var(--color-border), var(--color-background));
  border-radius: var(--radius-xl);
  margin-bottom: var(--space-4);
  overflow: hidden;
  position: relative;
}

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

.team-card-image-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--color-text-light);
}

.team-card-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.team-card-role {
  font-size: 13px;
  color: var(--color-text-muted);
}

/* ==========================================================================
   Timeline
   ========================================================================== */

.timeline {
  position: relative;
  padding: var(--space-8) 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 20px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

@media (min-width: 768px) {
  .timeline::before {
    left: 50%;
    transform: translateX(-50%);
  }
}

.timeline-item {
  position: relative;
  padding-left: 60px;
  padding-bottom: var(--space-10);
}

@media (min-width: 768px) {
  .timeline-item {
    width: 50%;
    padding-left: 0;
    padding-right: 40px;
  }
  
  .timeline-item:nth-child(even) {
    margin-left: 50%;
    padding-left: 40px;
    padding-right: 0;
  }
}

.timeline-dot {
  position: absolute;
  left: 12px;
  top: 4px;
  width: 18px;
  height: 18px;
  background: var(--color-accent);
  border: 3px solid var(--color-background);
  border-radius: 50%;
  z-index: 1;
}

@media (min-width: 768px) {
  .timeline-dot {
    left: auto;
    right: -9px;
  }
  
  .timeline-item:nth-child(even) .timeline-dot {
    left: -9px;
    right: auto;
  }
}

.timeline-content {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.timeline-year {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  background: rgba(16, 185, 129, 0.1);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-3);
}

.timeline-title {
  font-size: 1.125rem;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.timeline-text {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   Values Section
   ========================================================================== */

.values-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 640px) {
  .values-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .values-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.value-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  text-align: center;
  transition: all var(--transition-base);
}

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

.value-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-5);
  background: rgba(16, 185, 129, 0.1);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
}

.value-icon svg {
  width: 28px;
  height: 28px;
}

.value-title {
  font-size: 1.125rem;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.value-text {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   Process Section
   ========================================================================== */

.process-section {
  padding: var(--space-20) 0;
  background: var(--color-background);
}

.process-steps {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .process-steps {
    flex-direction: row;
    gap: var(--space-4);
  }
}

.process-step {
  flex: 1;
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  text-align: center;
}

@media (min-width: 768px) {
  .process-step:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 50%;
    right: -20px;
    width: 40px;
    height: 2px;
    background: var(--color-border);
    z-index: 1;
  }
}

.process-step-number {
  width: 40px;
  height: 40px;
  margin: 0 auto var(--space-4);
  background: var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  color: white;
}

.process-step-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.process-step-text {
  font-size: 14px;
  color: var(--color-text-muted);
}

/* ==========================================================================
   Case Studies / Cards
   ========================================================================== */

.case-studies-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .case-studies-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .case-studies-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.case-study-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-base);
}

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

.case-study-image {
  aspect-ratio: 16/10;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 3rem;
}

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

.case-study-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-accent);
  background: rgba(16, 185, 129, 0.1);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-3);
}

.case-study-title {
  font-size: 1.125rem;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.case-study-text {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-4);
}

.case-study-metrics {
  display: flex;
  gap: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.case-study-metric {
  text-align: center;
}

.case-study-metric-value {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
}

.case-study-metric-label {
  font-size: 12px;
  color: var(--color-text-muted);
}

/* ==========================================================================
   Filters
   ========================================================================== */

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
  justify-content: center;
}

.filter-btn {
  padding: var(--space-2) var(--space-4);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
  color: white;
  background: var(--color-primary);
  border-color: var(--color-primary);
}

/* ==========================================================================
   News / Articles
   ========================================================================== */

.news-featured {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  margin-bottom: var(--space-10);
}

@media (min-width: 768px) {
  .news-featured {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }
}

.news-featured-image {
  aspect-ratio: 16/10;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  display: flex;
  align-items: center;
  justify-content: center;
}

@media (min-width: 768px) {
  .news-featured-image {
    aspect-ratio: auto;
    min-height: 300px;
  }
}

.news-featured-content {
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.news-featured-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.news-featured-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.news-featured-excerpt {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-6);
}

.news-featured-meta {
  font-size: 13px;
  color: var(--color-text-light);
}

.news-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 640px) {
  .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .news-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.news-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-base);
}

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

.news-card-image {
  aspect-ratio: 16/10;
  background: linear-gradient(135deg, var(--color-border), var(--color-background));
}

.news-card-content {
  padding: var(--space-5);
}

.news-card-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-accent);
  margin-bottom: var(--space-2);
}

.news-card-title {
  font-size: 1rem;
  color: var(--color-text);
  margin-bottom: var(--space-2);
  line-height: 1.4;
}

.news-card-meta {
  font-size: 13px;
  color: var(--color-text-light);
}

/* ==========================================================================
   Loading States
   ========================================================================== */

.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ==========================================================================
   Responsive Utilities
   ========================================================================== */

.hidden { display: none !important; }

@media (min-width: 640px) {
  .sm\:block { display: block !important; }
  .sm\:hidden { display: none !important; }
}

@media (min-width: 768px) {
  .md\:block { display: block !important; }
  .md\:hidden { display: none !important; }
}

@media (min-width: 1024px) {
  .lg\:block { display: block !important; }
  .lg\:hidden { display: none !important; }
}