/* ================================
   Ideaticon - Clean Modern CSS
   Square Design System with Roboto
   ================================ */

/* Smooth scrolling for all anchor links */
html {
  scroll-behavior: smooth;
  font-size: 16px;
}

/* Account for fixed header when scrolling to sections */
section {
  scroll-margin-top: 80px;
}

/* CSS Variables */
:root {
  /* Deep Blue Authority Palette - Professional & Trustworthy */
  --bg-primary: #FFFFFF;
  --bg-secondary: #F8FAFC;    /* Slate 50 - Clean background */
  --bg-tertiary: #F1F5F9;     /* Slate 100 - Subtle contrast */
  --bg-card: #FFFFFF;
  --bg-hover: #F8FAFC;        /* Slate 50 - Gentle hover */
  --bg-elevated: #FFFFFF;
  --text-primary: #0F172A;    /* Slate 900 - Deep professional */
  --text-secondary: #334155;  /* Slate 700 - Strong secondary */
  --text-muted: #64748B;      /* Slate 500 - Professional muted */
  --accent: #1E3A8A;          /* Blue 800 - Deep authoritative blue */
  --accent-hover: #1E40AF;    /* Blue 700 - Rich interaction */
  --accent-light: #3B82F6;    /* Blue 500 - Brighter variant */
  --accent-alt: #7C3AED;      /* Violet 600 - Creative complement */
  --success: #059669;         /* Emerald 600 - Growth success */
  --warning: #D97706;         /* Amber 600 - Attention warning */
  --error: #DC2626;           /* Red 600 - Clear error */
  --border: rgba(27, 31, 35, 0.08);
  --border-muted: rgba(27, 31, 35, 0.04);
  --shadow: rgba(30, 58, 138, 0.08);       /* Deep blue-tinted shadows */
  --shadow-lg: rgba(30, 58, 138, 0.12);
  --shadow-xl: rgba(30, 58, 138, 0.16);
  --shadow-2xl: rgba(30, 58, 138, 0.20);

  /* Additional sophisticated colors */
  --purple: #7C3AED;          /* Violet 600 - Creative innovation */
  --purple-light: #A78BFA;    /* Violet 400 - Light variant */
  --teal: #0891B2;            /* Cyan 600 - Tech reliability */
  --teal-light: #67E8F9;      /* Cyan 300 - Light variant */

  /* Gradient definitions */
  --gradient-blue: linear-gradient(135deg, #1E3A8A 0%, #1E40AF 100%);
  --gradient-tech: linear-gradient(135deg, #1E3A8A 0%, #7C3AED 50%, #0891B2 100%);
  --gradient-cool: linear-gradient(135deg, #3B82F6 0%, #1E3A8A 100%);

  /* Logo colors */
  --logo-fill: #0A0A0A;
  --logo-stroke: #0A0A0A;
  --logo-highlight: #ffffff;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 6rem;

  /* Typography Scale */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  --font-size-6xl: 4rem;

  /* Transitions */
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
}

/* Dark Theme */
[data-theme="dark"] {
  --bg-primary: #0F172A;       /* Slate 900 - Deep blue-tinted dark */
  --bg-secondary: #1E293B;     /* Slate 800 - Rich dark blue */
  --bg-tertiary: #334155;      /* Slate 700 - Medium dark blue */
  --bg-card: #1E293B;          /* Slate 800 - Card background */
  --bg-hover: #334155;         /* Slate 700 - Subtle hover */
  --bg-elevated: #1E293B;      /* Slate 800 - Elevated surfaces */
  --text-primary: #F8FAFC;     /* Slate 50 - Bright text */
  --text-secondary: #CBD5E1;   /* Slate 300 - Secondary text */
  --text-muted: #94A3B8;       /* Slate 400 - Muted text */
  --accent: #60A5FA;           /* Blue 400 - Bright blue for dark mode */
  --accent-hover: #3B82F6;     /* Blue 500 - Hover state */
  --accent-light: #93C5FD;     /* Blue 300 - Light variant */
  --accent-alt: #A78BFA;       /* Violet 400 - Creative complement */
  --success: #34D399;          /* Emerald 400 - Success green */
  --warning: #FBBF24;          /* Amber 400 - Warning yellow */
  --error: #F87171;            /* Red 400 - Error red */
  --border: rgba(248, 250, 252, 0.08);
  --border-muted: rgba(248, 250, 252, 0.04);
  --shadow: rgba(15, 23, 42, 0.3);      /* Blue-tinted shadows */
  --shadow-lg: rgba(15, 23, 42, 0.4);
  --shadow-xl: rgba(15, 23, 42, 0.5);
  --shadow-2xl: rgba(15, 23, 42, 0.6);

  /* Additional colors for dark mode */
  --purple: #A78BFA;           /* Violet 400 - Bright purple */
  --purple-light: #C4B5FD;     /* Violet 300 - Light variant */
  --teal: #22D3EE;             /* Sky 400 - Bright teal-blue */
  --teal-light: #7DD3FC;       /* Sky 300 - Light variant */

  /* Logo colors for dark mode */
  --logo-fill: #F8FAFC;
  --logo-stroke: #F8FAFC;
  --logo-highlight: #0F172A;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: 'kern' 1, 'liga' 1, 'calt' 1;
  scroll-behavior: smooth;
}

/* Typography Scale */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-weight: 600;
  line-height: 1.2;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin: 0;
  font-variation-settings: 'opsz' 32, 'wght' 600;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  font-variation-settings: 'opsz' 48, 'wght' 700;
}

h2 {
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 600;
  letter-spacing: -0.025em;
  font-variation-settings: 'opsz' 32, 'wght' 600;
}

h3 {
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: -0.015em;
  font-variation-settings: 'opsz' 24, 'wght' 500;
}

h4 {
  font-size: var(--font-size-xl);
  font-weight: 600;
}

h5 {
  font-size: var(--font-size-lg);
  font-weight: 600;
}

h6 {
  font-size: var(--font-size-base);
  font-weight: 600;
}

p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

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

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

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

/* MODERN REFINED BUTTONS */
.btn {
  padding: 14px 32px;
  font-size: 0.95rem;
  font-weight: 500;
  font-family: inherit;
  border: none;
  border-radius: 8px;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 3;
  line-height: 1;
  letter-spacing: -0.01em;
  overflow: hidden;
  will-change: transform, box-shadow;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent);
  opacity: 0;
  transition: opacity 0.2s ease;
}

.btn:hover::before {
  opacity: 1;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
  color: white;
  border: 1px solid transparent;
  box-shadow: 0 1px 3px var(--shadow), 0 4px 12px rgba(30, 58, 138, 0.15);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px var(--shadow-lg), 0 8px 24px rgba(30, 58, 138, 0.25);
  background: linear-gradient(135deg, var(--accent-hover) 0%, var(--accent) 100%);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 1px 3px var(--shadow), 0 2px 8px rgba(30, 58, 138, 0.2);
}

.btn-secondary {
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 1.5px solid var(--border);
  box-shadow: 0 1px 3px var(--shadow);
}

.btn-secondary:hover {
  background: var(--bg-tertiary);
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px var(--shadow-lg);
}

.btn-secondary:active {
  transform: translateY(0);
  box-shadow: 0 1px 3px var(--shadow);
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-muted);
  z-index: 1000;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform, backdrop-filter;
}

[data-theme="dark"] .nav {
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
}

.nav.scrolled {
  backdrop-filter: blur(20px) saturate(180%) brightness(1.02);
  box-shadow: 0 1px 3px var(--shadow), 0 1px 2px var(--shadow-lg);
  border-bottom-color: var(--border);
}

[data-theme="dark"] .nav.scrolled {
  backdrop-filter: blur(20px) saturate(180%) brightness(0.98);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg) 0;
  position: relative;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav.scrolled .nav-wrapper {
  padding: var(--spacing-md) 0;
}

.logo {
  display: flex;
  align-items: center;
}

.logo img {
  filter:
    brightness(0)
    saturate(100%)
    invert(0%)
    sepia(0%)
    saturate(0%)
    hue-rotate(0deg)
    brightness(0%)
    contrast(100%);
}

[data-theme="dark"] .logo img {
  filter:
    brightness(0)
    saturate(100%)
    invert(100%)
    sepia(0%)
    saturate(0%)
    hue-rotate(0deg)
    brightness(100%)
    contrast(100%);
}

.logo-text {
  font-family: 'Inter', sans-serif;
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: var(--spacing-xl);
}

.nav-menu a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  text-decoration: none;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 6px;
}

.nav-menu a::before {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  transform: translateX(-50%);
}

.nav-menu a:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
}

.nav-menu a:hover::before,
.nav-menu a.active::before {
  width: 20px;
}

.nav-menu a.active {
  color: var(--accent);
  font-weight: 600;
}

/* Dropdown Navigation */
.nav-dropdown {
  position: relative;
  display: flex;
  align-items: center;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.dropdown-arrow {
  width: 16px;
  height: 16px;
  transition: var(--transition);
}

.nav-dropdown:hover .dropdown-arrow {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 10px 40px var(--shadow-lg), 0 4px 16px var(--shadow);
  min-width: 300px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px) scale(0.96);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1000;
  overflow: hidden;
  backdrop-filter: blur(12px);
}

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

.dropdown-item {
  display: block;
  padding: var(--spacing-lg);
  text-decoration: none;
  color: inherit;
  transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  border-bottom: 1px solid var(--border-muted);
  position: relative;
}

.dropdown-item:last-child {
  border-bottom: none;
}

.dropdown-item:hover {
  background: var(--bg-tertiary);
  transform: translateX(2px);
}

.dropdown-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--accent);
  transform: scaleY(0);
  transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.dropdown-item:hover::before {
  transform: scaleY(1);
}

.dropdown-item-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.dropdown-title {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 1rem;
}

.dropdown-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* Theme Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.theme-toggle::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle, var(--accent) 0%, transparent 70%);
  opacity: 0;
  transform: scale(0);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.theme-toggle:hover {
  background: var(--bg-hover);
  border-color: var(--accent);
  transform: scale(1.05);
}

.theme-toggle:hover::before {
  opacity: 0.05;
  transform: scale(1);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
  color: var(--text-secondary);
  transition: all 0.2s ease;
  position: relative;
  z-index: 1;
}

.theme-toggle:hover svg {
  color: var(--accent);
  transform: rotate(15deg);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  z-index: 1001;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  backdrop-filter: blur(10px);
}

.mobile-menu-toggle:hover {
  background: var(--bg-hover);
  border-color: var(--accent);
  transform: scale(1.05);
}

.mobile-menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 1px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.mobile-menu-toggle.active {
  background: var(--accent);
  border-color: var(--accent);
}

.mobile-menu-toggle.active span {
  background: white;
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
  transform: scale(0);
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* Mobile Theme Toggle */
.mobile-only {
  display: none;
}

.theme-toggle-mobile {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--spacing-sm) 0;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-primary);
  font-size: 1rem;
}

.theme-switch {
  position: relative;
  width: 48px;
  height: 26px;
  background: var(--bg-hover);
  border-radius: 13px;
  border: 1px solid var(--border);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
}

.theme-switch::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(45deg, var(--accent), var(--accent-light));
  opacity: 0;
  transition: opacity 0.3s ease;
}

[data-theme="dark"] .theme-switch::before {
  opacity: 1;
}

.switch-indicator {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  background: var(--bg-primary);
  border-radius: 10px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  z-index: 1;
}

[data-theme="dark"] .switch-indicator {
  transform: translateX(22px);
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

/* Hero Section */
.hero {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 100vh;
  padding: calc(80px + var(--spacing-2xl)) 0 var(--spacing-2xl);
  background: var(--bg-primary);
  position: relative;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
  max-width: 1000px;
  margin: 0 auto var(--spacing-4xl);
  text-align: center;
  position: relative;
  z-index: 2;
}

.hero-header {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  align-items: center;
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.hero-title {
  font-size: clamp(32px, 6vw, 72px);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.1;
  letter-spacing: -0.025em;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

[data-theme="dark"] .hero-title {
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(18px, 2.5vw, 24px);
  color: var(--text-secondary);
  line-height: 1.6;
  font-weight: 400;
  max-width: 600px;
  margin: 0 auto 24px;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  align-items: center;
}

.hero-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Hero Logos Section */
.hero-logos {
  position: relative;
  z-index: 2;
  margin-bottom: var(--spacing-2xl);
}

.hero-logos .logos-title {
  text-align: center;
  color: var(--text-muted);
  font-size: var(--font-size-sm);
  font-weight: 500;
  margin-bottom: var(--spacing-lg);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* Hero Metrics Section */
.hero-metrics {
  position: relative;
  z-index: 2;
}

.hero-metrics .metrics-grid {
  display: flex;
  justify-content: center;
  gap: var(--spacing-2xl);
  flex-wrap: wrap;
}

.hero-metrics .metric-item {
  text-align: center;
  min-width: 140px;
}

.hero-metrics .metric-number {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  line-height: 1;
  margin-bottom: var(--spacing-xs);
}

.hero-metrics .metric-label {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Enhanced Animations */
@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fade-in-scale {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

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

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

/* Theme transition */
.theme-transition,
.theme-transition *,
.theme-transition *::before,
.theme-transition *::after {
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
  transition-delay: 0s !important;
}

/* Scroll effects for sections - improved for smoother loading */
.approach,
.projects,
.services,
.contact {
  transform: translateY(20px);
  opacity: 0.8;
  transition: all 0.6s cubic-bezier(0.23, 1, 0.32, 1);
}

.approach.in-view,
.projects.in-view,
.services.in-view,
.contact.in-view {
  transform: translateY(0);
  opacity: 1;
}

/* Card animation classes - improved initial state */
.client-card,
.service-card,
.stage-card {
  opacity: 0.9;
  transform: translateY(10px);
  transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
}

.animate-in {
  opacity: 1 !important;
  transform: translateY(0) !important;
  animation: fade-in-scale 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

/* Staggered animations & Unique Colors */
.stage-card:nth-child(1) {
  animation-delay: 0s;
  --card-accent: var(--accent);        /* Sky Blue - Discovery */
}
.stage-card:nth-child(2) {
  animation-delay: 0.1s;
  --card-accent: var(--purple);        /* Violet - Creativity */
}
.stage-card:nth-child(3) {
  animation-delay: 0.2s;
  --card-accent: var(--teal);          /* Cyan - Technology */
}
.stage-card:nth-child(4) {
  animation-delay: 0.3s;
  --card-accent: var(--accent-alt);    /* Violet - Innovation */
}

.client-card:nth-child(1) { animation-delay: 0s; }
.client-card:nth-child(2) { animation-delay: 0.1s; }
.client-card:nth-child(3) { animation-delay: 0.2s; }
.client-card:nth-child(4) { animation-delay: 0.3s; }

.service-card:nth-child(1) { animation-delay: 0s; }
.service-card:nth-child(2) { animation-delay: 0.1s; }
.service-card:nth-child(3) { animation-delay: 0.2s; }
.service-card:nth-child(4) { animation-delay: 0.3s; }
.service-card:nth-child(5) { animation-delay: 0.4s; }
.service-card:nth-child(6) { animation-delay: 0.5s; }

/* Section Headers */
.section-header {
  text-align: left;
  margin-bottom: var(--spacing-2xl);
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.section-subtitle {
  text-align: center;
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-3xl);
  font-weight: 400;
  line-height: 1.5;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Client Logos Strip */
.client-logos-strip {
  padding: var(--spacing-4xl) 0;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}

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

.logos-title {
  font-size: 0.875rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-2xl);
  font-weight: 500;
}

.logos-carousel {
  position: relative;
  width: 100%;
  overflow: hidden;
  mask: linear-gradient(90deg, transparent, black 10%, black 90%, transparent);
  pointer-events: none;
}

.logos-track {
  display: flex;
  align-items: center;
  animation: scroll-logos 20s linear infinite;
  gap: 4rem;
  width: max-content;
}

.logo-item {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 80px;
  min-width: 200px;
  opacity: 0.85;
  flex-shrink: 0;
  pointer-events: none;
}

.logo-item img {
  max-height: 100%;
  max-width: 180px;
  width: auto;
  filter: none;
}

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

/* Hide mobile text version on desktop */
.mobile-clients-text {
  display: none;
}

/* Trust Metrics */
.trust-metrics {
  padding: var(--spacing-4xl) 0;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border);
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-xl);
  text-align: center;
}

.metric-item .metric-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: var(--spacing-xs);
}

.metric-item .metric-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Our Approach Section */
.approach {
  padding: var(--spacing-4xl) 0;
  background: var(--bg-secondary);
  position: relative;
}

.approach::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--text-muted) 1px, transparent 1px),
    linear-gradient(90deg, var(--text-muted) 1px, transparent 1px);
  background-size: 80px 80px;
  opacity: 0.02;
  z-index: 0;
}

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

.approach-stages {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.stage-card {
  padding: var(--spacing-2xl);
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: 16px;
  position: relative;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
  backdrop-filter: blur(10px);
  will-change: transform, box-shadow;
}

.stage-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 0;
}

.stage-card:hover {
  transform: translateY(-4px) scale(1.01);
  border-color: var(--card-accent, var(--accent));
  box-shadow: 0 12px 40px var(--shadow-lg), 0 4px 16px var(--shadow);
}

.stage-card:hover::before {
  opacity: 0.02;
}

.stage-card > * {
  position: relative;
  z-index: 1;
}

.stage-number {
  font-size: 3rem;
  font-weight: 700;
  color: var(--card-accent, var(--accent));
  opacity: 0.15;
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
}

.stage-card h3 {
  margin-bottom: var(--spacing-md);
  position: relative;
  z-index: 1;
}

.stage-card p {
  margin-bottom: var(--spacing-lg);
  position: relative;
  z-index: 1;
}

.stage-points {
  list-style: none;
  padding: 0;
}

.stage-points li {
  padding-left: 1.5rem;
  position: relative;
  margin-bottom: var(--spacing-sm);
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.stage-points li:before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--card-accent, var(--accent));
}

/* Projects Section */
.projects {
  padding: var(--spacing-4xl) 0;
  background: var(--bg-primary);
}

.clients-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

.clients-grid-single {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-xl);
}

.client-card {
  display: flex;
  flex-direction: column;
  padding: var(--spacing-2xl);
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: 16px;
  text-decoration: none;
  color: inherit;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
  will-change: transform, box-shadow;
  isolation: isolate;
}

.client-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg,
    var(--accent) 0%,
    var(--accent-light) 40%,
    var(--accent-alt) 100%);
  opacity: 0;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: -1;
}

.client-card::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.05) 0%, transparent 70%);
  transform: scale(0);
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: -1;
}

.client-card:hover {
  transform: translateY(-6px) scale(1.02);
  box-shadow:
    0 20px 60px var(--shadow-2xl),
    0 8px 32px var(--shadow-lg),
    0 0 0 1px rgba(6, 95, 70, 0.1);
  border-color: rgba(6, 95, 70, 0.3);
}

.client-card:hover::before {
  opacity: 0.03;
}

.client-card:hover::after {
  transform: scale(1);
}

.client-card > * {
  position: relative;
  z-index: 1;
}

.client-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-muted);
  border-radius: 12px;
  padding: 8px;
  margin-bottom: var(--spacing-lg);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  backdrop-filter: blur(10px);
}

.client-card:hover .client-logo {
  transform: scale(1.1) rotate(2deg);
  border-color: var(--accent);
  box-shadow: 0 4px 16px rgba(6, 95, 70, 0.1);
}

.client-logo img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
}

.client-header h3 {
  margin-bottom: var(--spacing-sm);
}

.client-description {
  margin-bottom: var(--spacing-lg);
  flex: 1;
}

.client-metrics {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.metric {
  display: flex;
  flex-direction: column;
}

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

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

.client-tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

.client-tech span {
  padding: 6px 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-muted);
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.2s ease;
  backdrop-filter: blur(5px);
}

.client-card:hover .client-tech span {
  background: rgba(16, 185, 129, 0.1);
  border-color: rgba(16, 185, 129, 0.2);
  color: var(--accent);
  transform: translateY(-1px);
}

/* Services Section */
.services {
  padding: var(--spacing-2xl) 0;
  background: var(--bg-primary);
}

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

.services-grid-6 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
}

.service-card {
  padding: var(--spacing-2xl);
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: 16px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
  will-change: transform, box-shadow;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.service-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent-alt) 0%, var(--accent) 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 0;
}

.service-card:hover {
  border-color: var(--accent);
  box-shadow: 0 12px 40px var(--shadow-lg), 0 4px 16px var(--shadow);
  transform: translateY(-4px) scale(1.01);
}

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

.service-card:hover::after {
  opacity: 0.02;
}

.service-card > * {
  position: relative;
  z-index: 1;
}

.service-card h3 {
  margin-bottom: var(--spacing-md);
}

.service-card p {
  margin-bottom: var(--spacing-lg);
}

.service-tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  list-style: none;
}

.service-tech li {
  padding: 6px 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-muted);
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.2s ease;
  backdrop-filter: blur(5px);
}

.service-card:hover .service-tech li {
  background: rgba(124, 58, 237, 0.1);
  border-color: rgba(124, 58, 237, 0.2);
  color: var(--accent-alt);
  transform: translateY(-1px);
}

/* About Section */
.about {
  padding: var(--spacing-2xl) 0;
  background: var(--bg-secondary);
}

.about-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2xl);
  text-align: center;
}

.about-text {
  max-width: 600px;
  margin: 0 auto;
}

.about-text p {
  font-size: 1.25rem;
  line-height: 1.6;
}

.about-highlights {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xl);
  flex-wrap: wrap;
}

.highlight {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
}

.highlight h4 {
  font-size: 1.125rem;
  color: var(--text-primary);
}

.highlight p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Contact Section */
.contact {
  padding: var(--spacing-2xl) 0;
  background: var(--bg-primary);
}

.contact-content {
  display: flex;
  gap: var(--spacing-2xl);
  align-items: flex-start;
}

.contact-info {
  flex: 1;
}

.contact-info h3 {
  margin-bottom: var(--spacing-md);
}

.contact-info p {
  margin-bottom: var(--spacing-lg);
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.contact-method {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition);
}

.contact-method:hover {
  color: var(--accent);
}

.contact-method svg {
  width: 20px;
  height: 20px;
}

/* Contact Form */
.contact-form-container {
  flex: 1.2;
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: 16px;
  padding: var(--spacing-2xl);
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 24px var(--shadow);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.contact-form-container:hover {
  border-color: var(--accent);
  box-shadow: 0 8px 32px var(--shadow-lg);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.form-row {
  display: flex;
  gap: var(--spacing-md);
  width: 100%;
}

.form-group {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  position: relative;
}

/* MODERN REFINED FORM INPUTS */
.form-group input,
.form-group select,
.form-group textarea {
  padding: var(--spacing-md) var(--spacing-lg);
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: inherit;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  height: 48px;
  position: relative;
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1), 0 1px 3px var(--shadow);
  background: var(--bg-elevated);
}

.form-group textarea {
  height: auto;
  min-height: 100px;
  resize: vertical;
  padding-top: var(--spacing-sm);
  padding-bottom: var(--spacing-sm);
}

.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23888' stroke-width='2'%3e%3cpolyline points='6,9 12,15 18,9'%3e%3c/polyline%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right var(--spacing-md) center;
  background-size: 16px;
  padding-right: calc(var(--spacing-lg) * 2.5);
  cursor: pointer;
  position: relative;
  z-index: 1;
  min-height: 48px;
  width: 100%;
}

[data-theme="dark"] .form-group select {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23A1A1A6' stroke-width='2'%3e%3cpolyline points='6,9 12,15 18,9'%3e%3c/polyline%3e%3c/svg%3e");
}

/* Specific fix for select dropdown visibility */
.form-group select option {
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-primary);
  color: var(--text-primary);
}

[data-theme="dark"] .form-group select option {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

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

.form-group select:required:invalid {
  color: var(--text-muted);
}

.form-group select option {
  color: var(--text-primary);
  background: var(--bg-primary);
}

.form-group select option[value=""] {
  color: var(--text-muted);
}

.form-status {
  margin-top: var(--spacing-sm);
  padding: var(--spacing-sm);
  border-radius: 0;
  text-align: center;
  font-weight: 500;
  display: none;
}

.form-status.success {
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.form-status.error {
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.contact-form .btn {
  align-self: flex-start;
  margin-top: var(--spacing-sm);
}

/* Footer */
.footer {
  padding: var(--spacing-xl) 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  position: relative;
}

.footer::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--text-muted) 1px, transparent 1px),
    linear-gradient(90deg, var(--text-muted) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.05;
  z-index: 0;
}

.footer-content {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-top: var(--spacing-xs);
}

.footer-links {
  display: flex;
  gap: var(--spacing-lg);
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: var(--transition);
}

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

.footer-copy p {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* Client Pages */
.case-study-header {
  padding: calc(80px + var(--spacing-2xl)) 0 var(--spacing-xl);
  border-bottom: 1px solid var(--border);
}

.case-study-intro {
  max-width: 800px;
}

.client-logo-large {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.client-logo-large img {
  width: 64px;
  height: 64px;
  object-fit: contain;
  background: #FFFFFF;
  border-radius: 0;
  padding: var(--spacing-xs);
}

.client-name {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
}

.case-study-header h1 {
  margin-bottom: var(--spacing-md);
}

.case-study-summary {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
}

.case-study-metrics {
  display: flex;
  gap: var(--spacing-xl);
  flex-wrap: wrap;
}

/* Technical Implementation Section */
.case-content {
  padding: var(--spacing-2xl) 0;
  background: var(--bg-primary);
}

.detailed-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2xl);
}

.content-section {
  max-width: none;
}

.content-section h3 {
  font-size: 2rem;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

.content-section > p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-2xl);
  max-width: 800px;
}

.tech-stack-overview {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

.tech-detail {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0;
  padding: var(--spacing-xl);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.tech-detail::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--accent);
  transform: scaleY(0);
  transform-origin: top;
  transition: var(--transition);
}

.tech-detail:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 30px var(--shadow);
  border-color: var(--accent);
}

.tech-detail:hover::before {
  transform: scaleY(1);
}

.tech-detail h4 {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

.tech-detail p {
  color: var(--text-secondary);
  line-height: 1.7;
}

.outcome-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0;
  padding: var(--spacing-xl);
}

.outcome-section h3 {
  font-size: 1.75rem;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.outcome-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.outcome-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  font-size: 1.125rem;
  color: var(--text-secondary);
  padding: var(--spacing-sm) 0;
}

.outcome-list li::before {
  content: '•';
  color: var(--accent);
  font-weight: bold;
  font-size: 1.25rem;
  margin-top: 2px;
  flex-shrink: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .mobile-menu-toggle {
    display: flex;
    order: 2;
  }

  .theme-toggle {
    order: 3;
    margin-left: var(--spacing-sm);
  }

  .nav-menu {
    position: fixed;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    flex-direction: column;
    padding: var(--spacing-xl);
    gap: var(--spacing-lg);
    border-bottom: 1px solid var(--border);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 999;
    box-shadow: 0 20px 40px var(--shadow-xl);
    max-height: 70vh;
    overflow-y: auto;
  }

  [data-theme="dark"] .nav-menu {
    background: rgba(13, 17, 23, 0.95);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-menu a {
    padding: var(--spacing-md);
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 500;
    transition: all 0.2s ease;
  }

  .nav-menu a:hover {
    background: var(--bg-tertiary);
    transform: translateX(8px);
  }

  .nav-dropdown .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: 1px solid var(--border-muted);
    border-radius: 12px;
    margin-top: var(--spacing-sm);
    margin-left: var(--spacing-md);
    display: none;
    background: var(--bg-tertiary);
    backdrop-filter: none;
  }

  .nav-dropdown.active .dropdown-menu {
    display: block;
  }

  .mobile-only {
    display: list-item;
    border-top: 1px solid var(--border);
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
  }

  .theme-toggle {
    display: none;
  }

  .hero {
    padding: calc(80px + var(--spacing-md)) 0 var(--spacing-xl);
  }

  .hero-content {
    text-align: center;
    gap: var(--spacing-md);
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
    margin-top: var(--spacing-sm);
  }

  .hero-title {
    font-size: clamp(28px, 8vw, 52px);
    line-height: 1.15;
    letter-spacing: -0.02em;
    text-align: center;
    padding: 0 var(--spacing-md);
  }

  .btn {
    width: 100%;
    max-width: 300px;
    padding: 16px 24px;
    font-size: 1rem;
    touch-action: manipulation;
  }

  .btn:active {
    transform: scale(0.98);
  }

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

  .projects,
  .services,
  .about,
  .contact {
    padding: var(--spacing-xl) 0;
  }

  .about-content {
    text-align: center;
    gap: var(--spacing-xl);
  }

  .contact-content {
    flex-direction: column;
    gap: var(--spacing-lg);
    align-items: center;
  }

  .contact-form-container {
    width: 100%;
    max-width: 500px;
  }

  .form-row {
    flex-direction: column;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
  }

  .about-highlights {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .case-study-metrics {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .approach-stages {
    grid-template-columns: 1fr;
  }

  .clients-grid-single {
    grid-template-columns: 1fr;
  }

  .services-grid-6 {
    grid-template-columns: repeat(2, 1fr);
  }

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

  /* Hide carousel on mobile - replace with simple text list */
  .hero-logos {
    margin-bottom: var(--spacing-xl);
  }

  .logos-carousel {
    display: block;
    /* Mobile-optimized carousel settings */
    mask: linear-gradient(90deg, transparent, black 15%, black 85%, transparent);
  }

  .logos-track {
    /* Slower animation for better mobile performance */
    animation: scroll-logos 30s linear infinite;
    gap: 2.5rem;
  }

  .logo-item {
    height: 60px;
    min-width: 140px;
  }

  .logo-item img {
    max-height: 100%;
    max-width: 120px;
  }

  /* Hide text version since carousel now works */
  .mobile-clients-text {
    display: none;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-lg);
  }

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

  .hero {
    padding: calc(80px + var(--spacing-sm)) 0 var(--spacing-md);
  }

  .hero-content {
    gap: var(--spacing-sm);
  }

  .hero-buttons {
    margin-top: var(--spacing-xs);
    gap: var(--spacing-xs);
  }

  .projects,
  .services,
  .about,
  .contact {
    padding: var(--spacing-lg) 0;
  }

  .section-header {
    margin-bottom: var(--spacing-md);
  }

  .section-title {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-xs);
  }

  .clients-grid,
  .services-grid {
    gap: var(--spacing-md);
  }

  .client-card,
  .service-card {
    padding: var(--spacing-md);
  }

  .about-content {
    gap: var(--spacing-md);
  }

  .about-highlights {
    gap: var(--spacing-sm);
  }

  .contact-content {
    gap: var(--spacing-md);
  }

  .contact-form-container {
    padding: var(--spacing-md);
  }

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

  .form-row {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .footer {
    padding: var(--spacing-md) 0;
  }

  .services-grid-6 {
    grid-template-columns: 1fr;
  }

  /* Enhanced touch interactions */
  .client-card,
  .service-card,
  .stage-card {
    transition: all 0.2s ease;
    touch-action: manipulation;
  }

  .client-card:active,
  .service-card:active,
  .stage-card:active {
    transform: scale(0.98);
  }

  /* Improve readability on small screens */
  .hero-subtitle {
    font-size: 1.1rem;
    line-height: 1.6;
    padding: 0 var(--spacing-sm);
  }

  .section-title {
    font-size: 2rem;
    line-height: 1.2;
  }

  .section-subtitle {
    font-size: 1rem;
    line-height: 1.6;
    padding: 0 var(--spacing-sm);
  }

  /* Optimize form for mobile */
  .contact-form-container {
    padding: var(--spacing-lg);
    border-radius: 12px;
  }

  .form-group input,
  .form-group select,
  .form-group textarea {
    font-size: 16px; /* Prevents zoom on iOS */
    padding: var(--spacing-lg);
  }
}

/* Page transition animations - smoother initial load */
body {
  opacity: 1;
  transition: opacity 0.2s ease-in-out;
}

body.page-transition {
  opacity: 0;
  transform: scale(0.98);
}

.reveal {
  animation: reveal 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

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

/* Performance optimizations */
.client-card,
.service-card,
.stage-card {
  will-change: transform, opacity;
  backface-visibility: hidden;
  perspective: 1000px;
}

/* Accessibility: Respect user's motion preferences */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .animate-on-scroll,
  .animate-in {
    animation: none;
    opacity: 1;
    transform: none;
  }
}