/* ==========================================================================
   RDAVID Solutions - Premium Stylesheet v2
   Fully responsive with filled visuals and enhanced layout
   ========================================================================== */

/* ==========================================================================
   1. CSS Custom Properties
   ========================================================================== */

:root {
  /* Background Colors */
  --bg-black: #000000;
  --bg-dark: #050505;
  --bg-card: #0a0a0a;
  --bg-card-hover: #111111;
  --bg-input: #0f0f0f;
  --border-color: #1a1a1a;
  --border-hover: #2a2a2a;

  /* Text Colors */
  --text-white: #ffffff;
  --text-light: #e5e5e5;
  --text-gray: #888888;
  --text-muted: #555555;

  /* Accent Colors */
  --accent-purple: #8b5cf6;
  --accent-purple-glow: rgba(139, 92, 246, 0.3);
  --accent-cyan: #22d3ee;
  --accent-cyan-glow: rgba(34, 211, 238, 0.3);
  --accent-pink: #ec4899;
  --accent-pink-glow: rgba(236, 72, 153, 0.3);
  --accent-green: #10b981;
  --accent-green-glow: rgba(16, 185, 129, 0.3);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Spacing - Mobile First */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2.5rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);

  /* Z-index */
  --z-header: 100;
  --z-mobile-menu: 200;
}

/* ==========================================================================
   2. CSS Reset & Base
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-size: 16px;
}

body {
  font-family: var(--font-primary);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.6;
  color: var(--text-light);
  background-color: var(--bg-black);
  overflow-x: hidden;
  min-height: 100vh;
}

::selection {
  background: var(--accent-purple);
  color: var(--text-white);
}

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

a {
  color: inherit;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  -webkit-tap-highlight-color: transparent;
}

input, textarea {
  font-family: inherit;
  font-size: 16px; /* Prevents zoom on iOS */
}

ul, ol {
  list-style: none;
}

/* Utility */
.desktop-only {
  display: none;
}

@media (min-width: 768px) {
  .desktop-only {
    display: inline;
  }
}

/* ==========================================================================
   3. Layout & Container
   ========================================================================== */

.container {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

@media (min-width: 768px) {
  .container {
    padding: 0 2rem;
  }
}

@media (min-width: 1024px) {
  .container {
    padding: 0 3rem;
  }
}

/* ==========================================================================
   4. Section Label
   ========================================================================== */

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  color: var(--text-gray);
  letter-spacing: 0.12em;
  margin-bottom: var(--space-xl);
}

.label-line {
  width: 3px;
  height: 14px;
  background: var(--accent-purple);
  border-radius: 2px;
}

.section-label-icon {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  vertical-align: middle;
  margin-right: 2px;
}

/* ==========================================================================
   5. Header & Navigation
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  padding: 1rem 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: all var(--transition-base);
}

.site-header.scrolled {
  padding: 0.75rem 0;
  background: rgba(0, 0, 0, 0.95);
  border-bottom-color: var(--border-color);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  background: var(--accent-purple);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.logo:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--accent-purple-glow);
}

.logo:active {
  transform: translateY(0);
}

.logo-icon {
  width: 24px;
  height: 24px;
  margin-right: 8px;
  border-radius: 50%;
}

.logo-text {
  color: var(--text-white);
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}

.main-nav {
  display: none;
  gap: 2rem;
}

.main-nav a {
  color: var(--text-gray);
  font-size: 0.85rem;
  font-weight: 400;
  transition: color var(--transition-fast);
  padding: 0.5rem 0;
}

.main-nav a:hover {
  color: var(--text-white);
}

.nav-btn {
  display: none;
  padding: 0.6rem 1.25rem;
  border: 1px solid var(--text-white);
  border-radius: var(--radius-full);
  color: var(--text-white);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: all var(--transition-fast);
}

.nav-btn:hover {
  background: var(--text-white);
  color: var(--bg-black);
}

/* Mobile Toggle */
.mobile-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 48px;
  height: 48px;
  gap: 6px;
  margin: -0.5rem -0.75rem -0.5rem 0;
}

.mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-white);
  border-radius: 1px;
  transition: all var(--transition-base);
}

.mobile-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

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

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

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-black);
  z-index: var(--z-mobile-menu);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.mobile-menu.active {
  opacity: 1;
  visibility: visible;
}

.mobile-menu-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
  padding: 2rem;
}

.mobile-menu a {
  color: var(--text-white);
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  transition: color var(--transition-fast);
  padding: 0.5rem 1rem;
}

.mobile-menu a:hover,
.mobile-menu a:active {
  color: var(--accent-purple);
}

.mobile-cta {
  margin-top: 1rem;
  padding: 1rem 2rem !important;
  background: var(--accent-purple);
  border-radius: var(--radius-full);
  font-size: 1rem !important;
}

@media (min-width: 768px) {
  .main-nav {
    display: flex;
  }

  .nav-btn {
    display: inline-flex;
  }

  .mobile-toggle {
    display: none;
  }
}

/* ==========================================================================
   6. Hero Section
   ========================================================================== */

.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  padding: 7rem 0 3rem;
  overflow: hidden;
}

/* Hero Blobs */
.hero-blob {
  position: absolute;
  pointer-events: none;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.6;
}

.hero-blob:first-of-type {
  top: -10%;
  right: -20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--accent-purple-glow) 0%, transparent 70%);
  animation: blob-float 20s ease-in-out infinite;
}

.hero-blob.secondary {
  bottom: 10%;
  left: -15%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, var(--accent-cyan-glow) 0%, transparent 70%);
  animation: blob-float 25s ease-in-out infinite reverse;
}

.hero-blob.tertiary {
  top: 50%;
  right: 20%;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, var(--accent-pink-glow) 0%, transparent 70%);
  animation: blob-float 18s ease-in-out infinite 2s;
}

@keyframes blob-float {
  0%, 100% {
    transform: translate(0, 0) scale(1);
  }
  33% {
    transform: translate(30px, -30px) scale(1.1);
  }
  66% {
    transform: translate(-20px, 20px) scale(0.9);
  }
}

/* Grid Pattern */
.hero-grid-pattern {
  position: absolute;
  inset: 0;
  background-image:
          linear-gradient(var(--border-color) 1px, transparent 1px),
          linear-gradient(90deg, var(--border-color) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.3;
  mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
}

/* Hero Layout */
.hero-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content {
  text-align: center;
}

.hero-headline {
  margin: var(--space-lg) 0;
}

.hero-headline .line {
  display: block;
  overflow: hidden;
}

.hero-headline .word {
  display: inline-block;
  font-size: clamp(2.25rem, 10vw, 6rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--text-white);
  transform: translateY(100%);
  animation: text-reveal 0.8s var(--ease-out-expo) forwards;
}

.hero-headline .line:nth-child(1) .word { animation-delay: 0.1s; }
.hero-headline .line:nth-child(2) .word { animation-delay: 0.2s; }
.hero-headline .line:nth-child(3) .word { animation-delay: 0.3s; }

.hero-headline .line.accent .word {
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

@keyframes text-reveal {
  to { transform: translateY(0); }
}

.hero-subtitle {
  max-width: 500px;
  margin: 0 auto var(--space-xl);
  font-size: 1rem;
  color: var(--text-gray);
  line-height: 1.7;
  opacity: 0;
  animation: fade-in-up 0.8s var(--ease-out-expo) 0.5s forwards;
}

@keyframes fade-in-up {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Hero CTA Buttons */
.hero-cta {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  justify-content: center;
  opacity: 0;
  transform: translateY(20px);
  animation: fade-in-up 0.8s var(--ease-out-expo) 0.6s forwards;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 2rem;
  background: var(--accent-purple);
  color: var(--text-white);
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.btn-primary:hover {
  background: #9d6fff;
  transform: translateY(-2px);
  box-shadow: 0 10px 30px var(--accent-purple-glow);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 2rem;
  background: transparent;
  border: 1px solid var(--border-hover);
  color: var(--text-white);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.btn-secondary:hover {
  border-color: var(--text-white);
  background: rgba(255,255,255,0.05);
}

/* Hero Visual - Filled with animated orbs */
.hero-visual {
  display: none;
  position: relative;
  height: 400px;
}

.visual-orb {
  position: absolute;
  border-radius: 50%;
}

.visual-orb.main {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 200px;
  height: 200px;
}

.orb-ring {
  position: absolute;
  inset: 0;
  border: 1px solid var(--accent-purple);
  border-radius: 50%;
  opacity: 0.3;
  animation: orb-pulse 3s ease-in-out infinite;
}

.orb-ring.delay {
  animation-delay: 1.5s;
}

@keyframes orb-pulse {
  0%, 100% {
    transform: scale(1);
    opacity: 0.3;
  }
  50% {
    transform: scale(1.5);
    opacity: 0;
  }
}

.orb-core {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-pink));
  border-radius: 50%;
  box-shadow: 0 0 60px var(--accent-purple-glow);
  animation: orb-glow 4s ease-in-out infinite;
}

.orb-core.cyan {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
  box-shadow: 0 0 40px var(--accent-cyan-glow);
}

.orb-core.pink {
  background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
  box-shadow: 0 0 30px var(--accent-pink-glow);
}

@keyframes orb-glow {
  0%, 100% { box-shadow: 0 0 60px var(--accent-purple-glow); }
  50% { box-shadow: 0 0 100px var(--accent-purple-glow); }
}

.orb-particles span {
  position: absolute;
  width: 6px;
  height: 6px;
  background: var(--accent-purple);
  border-radius: 50%;
  animation: particle-orbit 8s linear infinite;
}

.orb-particles span:nth-child(1) { animation-delay: 0s; }
.orb-particles span:nth-child(2) { animation-delay: 1s; }
.orb-particles span:nth-child(3) { animation-delay: 2s; }
.orb-particles span:nth-child(4) { animation-delay: 3s; }
.orb-particles span:nth-child(5) { animation-delay: 4s; }
.orb-particles span:nth-child(6) { animation-delay: 5s; }
.orb-particles span:nth-child(7) { animation-delay: 6s; }
.orb-particles span:nth-child(8) { animation-delay: 7s; }

@keyframes particle-orbit {
  0% { transform: rotate(0deg) translateX(100px) rotate(0deg); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: rotate(360deg) translateX(100px) rotate(-360deg); opacity: 0; }
}

.visual-orb.secondary {
  top: 20%;
  right: 10%;
  width: 60px;
  height: 60px;
  animation: float-secondary 6s ease-in-out infinite;
}

.visual-orb.secondary .orb-core {
  width: 100%;
  height: 100%;
}

.visual-orb.tertiary {
  bottom: 20%;
  left: 15%;
  width: 40px;
  height: 40px;
  animation: float-tertiary 7s ease-in-out infinite 1s;
}

.visual-orb.tertiary .orb-core {
  width: 100%;
  height: 100%;
}

@keyframes float-secondary {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

@keyframes float-tertiary {
  0%, 100% { transform: translateY(0) translateX(0); }
  50% { transform: translateY(-15px) translateX(10px); }
}

/* Floating Icons */
.floating-icon {
  position: absolute;
  width: 50px;
  height: 50px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-gray);
  animation: float-icon 5s ease-in-out infinite;
}

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

.floating-icon.icon-1 {
  top: 10%;
  left: 10%;
  animation-delay: 0s;
}

.floating-icon.icon-2 {
  bottom: 30%;
  right: 5%;
  animation-delay: 1s;
}

.floating-icon.icon-3 {
  bottom: 10%;
  left: 30%;
  animation-delay: 2s;
}

@keyframes float-icon {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-10px) rotate(5deg); }
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  opacity: 0;
  animation: fade-in-up 0.8s var(--ease-out-expo) 1s forwards;
}

@media (min-width: 768px) {
  .scroll-indicator {
    display: flex;
    bottom: 2rem;
  }
}

.scroll-indicator span {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-muted);
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--text-muted), transparent);
  animation: scroll-pulse 2s ease-in-out infinite;
}

@keyframes scroll-pulse {
  0%, 100% { opacity: 1; transform: scaleY(1); }
  50% { opacity: 0.5; transform: scaleY(0.6); }
}

@media (min-width: 768px) {
  .hero {
    padding: 8rem 0 4rem;
  }

  .hero-layout {
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
  }

  .hero-content {
    text-align: left;
  }

  .hero-subtitle {
    margin: 0 0 var(--space-xl);
  }

  .hero-cta {
    flex-direction: row;
    justify-content: flex-start;
  }

  .hero-visual {
    display: block;
  }
}

@media (min-width: 1024px) {
  .hero-blob:first-of-type {
    width: 600px;
    height: 600px;
  }

  .hero-blob.secondary {
    width: 450px;
    height: 450px;
  }

  .visual-orb.main {
    width: 280px;
    height: 280px;
  }
}

/* ==========================================================================
   7. Marquee
   ========================================================================== */

.marquee-container {
  overflow: hidden;
  white-space: nowrap;
  background: var(--bg-dark);
  padding: 1.25rem 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.marquee-track {
  display: inline-flex;
  animation: marquee 40s linear infinite;
}

.marquee-track span {
  padding: 0 1.25rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.15em;
}

.marquee-track .dot {
  color: var(--accent-purple);
}

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

/* ==========================================================================
   8. Hero Cards Section
   ========================================================================== */

.hero-cards-section {
  padding: var(--space-2xl) 0;
  background: var(--bg-black);
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

.hero-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1rem;
  text-align: center;
  overflow: hidden;
  transition: all var(--transition-base);
}

.hero-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
}

.card-glow {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 100px;
  border-radius: 50%;
  filter: blur(40px);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.hero-card:hover .card-glow {
  opacity: 0.5;
}

.hero-card[data-color="purple"] .card-glow { background: var(--accent-purple); }
.hero-card[data-color="cyan"] .card-glow { background: var(--accent-cyan); }
.hero-card[data-color="pink"] .card-glow { background: var(--accent-pink); }
.hero-card[data-color="green"] .card-glow { background: var(--accent-green); }

.hero-card .card-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-md);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-base);
}

.hero-card:hover .card-icon {
  transform: scale(1.1);
}

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

.hero-card[data-color="purple"] .card-icon {
  background: rgba(139, 92, 246, 0.15);
  color: var(--accent-purple);
}

.hero-card[data-color="cyan"] .card-icon {
  background: rgba(34, 211, 238, 0.15);
  color: var(--accent-cyan);
}

.hero-card[data-color="pink"] .card-icon {
  background: rgba(236, 72, 153, 0.15);
  color: var(--accent-pink);
}

.hero-card[data-color="green"] .card-icon {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
}

.hero-card .card-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-white);
  margin-bottom: var(--space-xs);
}

.hero-card .card-desc {
  font-size: 0.75rem;
  color: var(--text-gray);
  margin-bottom: var(--space-md);
}

.hero-card .card-accent {
  width: 30px;
  height: 3px;
  margin: 0 auto;
  border-radius: 2px;
  transition: width var(--transition-base);
}

.hero-card:hover .card-accent {
  width: 50px;
}

.hero-card[data-color="purple"] .card-accent { background: var(--accent-purple); }
.hero-card[data-color="cyan"] .card-accent { background: var(--accent-cyan); }
.hero-card[data-color="pink"] .card-accent { background: var(--accent-pink); }
.hero-card[data-color="green"] .card-accent { background: var(--accent-green); }

@media (min-width: 768px) {
  .hero-cards-section {
    padding: var(--space-3xl) 0;
  }

  .cards-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
  }

  .hero-card {
    padding: 2rem 1.5rem;
  }

  .hero-card .card-icon {
    width: 64px;
    height: 64px;
  }

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

  .hero-card .card-title {
    font-size: 1rem;
  }

  .hero-card .card-desc {
    font-size: 0.85rem;
  }
}

/* ==========================================================================
   9. About Section - With Filled Visual
   ========================================================================== */

.about-section {
  padding: var(--space-2xl) 0;
  background: var(--bg-dark);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}

.about-text h2 {
  font-size: clamp(1.5rem, 5vw, 2.25rem);
  font-weight: 600;
  color: var(--text-white);
  line-height: 1.3;
  margin-bottom: var(--space-lg);
}

.about-text h2 .highlight {
  color: var(--accent-purple);
}

.about-text h2 .emoji {
  display: inline-block;
  animation: rocket-bounce 2s ease-in-out infinite;
}

@keyframes rocket-bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}

.about-text p {
  color: var(--text-gray);
  font-size: 0.95rem;
  margin-bottom: var(--space-md);
  line-height: 1.8;
}

/* About Features */
.about-features {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: var(--space-lg);
}

.about-feature {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
}

.about-feature .feature-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-feature .feature-icon svg {
  width: 16px;
  height: 16px;
}

.about-feature .feature-icon.purple {
  background: rgba(139, 92, 246, 0.15);
  color: var(--accent-purple);
}

.about-feature .feature-icon.cyan {
  background: rgba(34, 211, 238, 0.15);
  color: var(--accent-cyan);
}

.about-feature .feature-icon.green {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
}

.about-feature span {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-light);
}

/* About Visual - Filled Tech Animation */
.about-visual {
  display: block;
}

.visual-container {
  position: relative;
  aspect-ratio: 1;
  max-width: 400px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.tech-visual {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tech-circle {
  position: relative;
  width: 120px;
  height: 120px;
}

.circle-ring {
  position: absolute;
  inset: 0;
  border: 1px solid var(--accent-purple);
  border-radius: 50%;
  animation: circle-rotate 20s linear infinite;
}

.circle-ring.delay-1 {
  inset: -20px;
  border-color: var(--accent-cyan);
  opacity: 0.5;
  animation-duration: 25s;
  animation-direction: reverse;
}

.circle-ring.delay-2 {
  inset: -40px;
  border-color: var(--accent-pink);
  opacity: 0.3;
  animation-duration: 30s;
}

@keyframes circle-rotate {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.circle-core {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-white);
  box-shadow: 0 0 40px var(--accent-purple-glow);
}

.circle-core svg {
  width: 28px;
  height: 28px;
}

/* Tech Lines */
.tech-lines {
  position: absolute;
  inset: 0;
}

.tech-lines .line {
  position: absolute;
  background: linear-gradient(90deg, transparent, var(--accent-purple), transparent);
  height: 1px;
  width: 40%;
}

.tech-lines .line-1 {
  top: 30%;
  left: 0;
  animation: line-scan 3s ease-in-out infinite;
}

.tech-lines .line-2 {
  top: 50%;
  right: 0;
  animation: line-scan 3s ease-in-out infinite 0.5s;
}

.tech-lines .line-3 {
  bottom: 35%;
  left: 0;
  animation: line-scan 3s ease-in-out infinite 1s;
}

.tech-lines .line-4 {
  bottom: 20%;
  right: 0;
  animation: line-scan 3s ease-in-out infinite 1.5s;
}

@keyframes line-scan {
  0%, 100% { opacity: 0.2; transform: scaleX(0.5); }
  50% { opacity: 1; transform: scaleX(1); }
}

/* Tech Nodes */
.tech-node {
  position: absolute;
  width: 12px;
  height: 12px;
}

.tech-node span {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--accent-purple);
  border-radius: 50%;
  animation: node-pulse 2s ease-in-out infinite;
}

.tech-node.node-1 { top: 20%; left: 20%; }
.tech-node.node-2 { top: 20%; right: 25%; animation-delay: 0.5s; }
.tech-node.node-2 span { background: var(--accent-cyan); }
.tech-node.node-3 { bottom: 25%; left: 25%; animation-delay: 1s; }
.tech-node.node-3 span { background: var(--accent-pink); }
.tech-node.node-4 { bottom: 20%; right: 20%; animation-delay: 1.5s; }
.tech-node.node-4 span { background: var(--accent-green); }

@keyframes node-pulse {
  0%, 100% { transform: scale(1); opacity: 0.7; }
  50% { transform: scale(1.3); opacity: 1; }
}

/* Visual Stats Overlay */
.visual-stats {
  position: absolute;
  bottom: 1rem;
  right: 1rem;
  background: rgba(0, 0, 0, 0.8);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
}

.mini-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.mini-stat .stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-purple);
}

.mini-stat .stat-text {
  font-size: 0.65rem;
  color: var(--text-gray);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

@media (min-width: 768px) {
  .about-section {
    padding: var(--space-3xl) 0;
  }

  .about-content {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
  }

  .visual-container {
    max-width: 100%;
  }

  .tech-circle {
    width: 160px;
    height: 160px;
  }

  .circle-core {
    width: 80px;
    height: 80px;
  }
}

/* ==========================================================================
   10. Services Section
   ========================================================================== */

.services-section {
  padding: var(--space-2xl) 0;
  background: var(--bg-black);
}

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

.services-header h2 {
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: var(--space-sm);
}

.services-header p {
  color: var(--text-gray);
  font-size: 1rem;
}

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

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-base);
}

.service-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.service-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-lg);
}

.service-number {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 400;
}

.service-icon-circle {
  width: 44px;
  height: 44px;
  border: 1px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-gray);
  transition: all var(--transition-fast);
}

.service-card:hover .service-icon-circle {
  border-color: var(--accent-purple);
  color: var(--accent-purple);
}

.service-icon-circle svg {
  width: 20px;
  height: 20px;
}

.service-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-white);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin-bottom: var(--space-sm);
}

.service-desc {
  font-size: 0.85rem;
  color: var(--text-gray);
  line-height: 1.6;
  margin-bottom: var(--space-lg);
  flex-grow: 1;
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  border: 1px solid var(--border-hover);
  border-radius: var(--radius-full);
  color: var(--text-light);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  width: fit-content;
  transition: all var(--transition-fast);
}

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

.service-link:hover {
  background: var(--text-white);
  border-color: var(--text-white);
  color: var(--bg-black);
}

.service-link:hover svg {
  transform: translate(2px, -2px);
}

@media (min-width: 640px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
  }
}

@media (min-width: 768px) {
  .services-section {
    padding: var(--space-3xl) 0;
  }

  .services-grid {
    gap: 1.5rem;
  }

  .service-card {
    padding: 2rem;
    min-height: 300px;
  }

  .service-icon-circle {
    width: 50px;
    height: 50px;
  }

  .service-title {
    font-size: 1.125rem;
  }
}

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

/* ==========================================================================
   11. Why Us Section
   ========================================================================== */

.why-section {
  padding: var(--space-2xl) 0;
  background: var(--bg-dark);
}

.why-headline {
  font-size: clamp(1.5rem, 5vw, 2.75rem);
  font-weight: 600;
  color: var(--text-white);
  line-height: 1.2;
  margin-bottom: var(--space-xl);
}

.why-headline .highlight {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: all var(--transition-fast);
}

.feature-card:hover {
  border-color: var(--border-hover);
}

.feature-icon-box {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
}

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

.feature-icon-box.purple {
  background: rgba(139, 92, 246, 0.15);
  color: var(--accent-purple);
}

.feature-icon-box.cyan {
  background: rgba(34, 211, 238, 0.15);
  color: var(--accent-cyan);
}

.feature-icon-box.pink {
  background: rgba(236, 72, 153, 0.15);
  color: var(--accent-pink);
}

.feature-icon-box.green {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
}

.feature-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-white);
  margin-bottom: var(--space-sm);
}

.feature-card p {
  font-size: 0.85rem;
  color: var(--text-gray);
  line-height: 1.7;
}

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

@media (min-width: 768px) {
  .why-section {
    padding: var(--space-3xl) 0;
  }
}

@media (min-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
  }
}

/* ==========================================================================
   12. Stats Section
   ========================================================================== */

.stats-section {
  padding: var(--space-2xl) 0;
  background: var(--bg-black);
}

.stats-container {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 2rem 1.5rem;
  overflow: hidden;
}

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

.stats-blob {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, var(--accent-purple-glow) 0%, transparent 70%);
  filter: blur(60px);
  opacity: 0.5;
}

.stats-grid {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

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

.stat-content {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 0.25rem;
}

.stat-number {
  font-size: clamp(2.5rem, 10vw, 4rem);
  font-weight: 700;
  color: var(--text-white);
  line-height: 1;
}

.stat-plus {
  font-size: clamp(1.5rem, 5vw, 2rem);
  font-weight: 300;
  color: var(--accent-purple);
}

.stat-label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-gray);
  margin-top: var(--space-sm);
}

.stat-divider {
  display: none;
  width: 1px;
  height: 60px;
  background: var(--border-color);
}

@media (min-width: 768px) {
  .stats-section {
    padding: var(--space-3xl) 0;
  }

  .stats-container {
    padding: 3rem 2rem;
  }

  .stats-grid {
    flex-direction: row;
    justify-content: space-around;
    align-items: center;
    gap: 2rem;
  }

  .stat-divider {
    display: block;
  }
}

/* ==========================================================================
   13. Contact CTA Section
   ========================================================================== */

.contact-cta-section {
  padding: var(--space-2xl) 0;
  background: var(--bg-dark);
}

.cta-container {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1.5rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
  cursor: pointer;
}

.cta-container:hover {
  border-color: var(--text-white);
}

.cta-arrow {
  width: 50px;
  height: 50px;
  min-width: 50px;
  border: 1px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-white);
  transition: all var(--transition-base);
}

.cta-container:hover .cta-arrow {
  transform: rotate(45deg);
  border-color: var(--accent-purple);
  background: var(--accent-purple);
}

.cta-arrow svg {
  width: 20px;
  height: 20px;
}

.cta-text {
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
  transition: transform var(--transition-base);
}

.cta-container:hover .cta-text {
  transform: translateX(10px);
}

.cta-text span {
  font-size: clamp(1.25rem, 5vw, 2.5rem);
  font-weight: 700;
  color: var(--text-white);
  line-height: 1.1;
  text-transform: uppercase;
  letter-spacing: -0.02em;
}

@media (min-width: 768px) {
  .contact-cta-section {
    padding: var(--space-3xl) 0;
  }

  .cta-container {
    padding: 3rem;
    gap: 2rem;
  }

  .cta-arrow {
    width: 60px;
    height: 60px;
    min-width: 60px;
  }

  .cta-arrow svg {
    width: 24px;
    height: 24px;
  }
}

/* ==========================================================================
   14. Contact Form Section - With Filled Info Card
   ========================================================================== */

.contact-form-section {
  padding: var(--space-xl) 0 var(--space-2xl);
  background: var(--bg-dark);
}

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

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

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-gray);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

.form-input {
  width: 100%;
  padding: 1rem 1.25rem;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-white);
  font-size: 0.95rem;
  transition: all var(--transition-fast);
}

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

.form-input:focus {
  outline: none;
  border-color: var(--accent-purple);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15);
}

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

.btn-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 1rem 2rem;
  background: var(--accent-purple);
  border: none;
  border-radius: var(--radius-full);
  color: var(--text-white);
  font-size: 0.85rem;
  font-weight: 600;
  width: 100%;
  transition: all var(--transition-fast);
}

.btn-submit svg {
  width: 18px;
  height: 18px;
}

.btn-submit:hover {
  background: #9d6fff;
  transform: translateY(-2px);
  box-shadow: 0 10px 30px var(--accent-purple-glow);
}

/* Contact Info Card - Filled Visual */
.contact-info {
  display: block;
}

.info-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 2rem;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.info-visual {
  position: relative;
  height: 150px;
  margin-bottom: var(--space-lg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-dark);
  display: flex;
  align-items: center;
  justify-content: center;
}

.info-blob {
  position: absolute;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, var(--accent-purple-glow) 0%, transparent 70%);
  filter: blur(40px);
  animation: blob-float 10s ease-in-out infinite;
}

.info-icon {
  position: relative;
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-white);
  box-shadow: 0 0 40px var(--accent-purple-glow);
}

.info-icon svg {
  width: 36px;
  height: 36px;
}

.info-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-white);
  margin-bottom: var(--space-sm);
}

.info-card p {
  color: var(--text-gray);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: var(--space-lg);
  flex-grow: 1;
}

.info-email {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.5rem;
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  color: var(--accent-cyan);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.info-email svg {
  width: 18px;
  height: 18px;
}

.info-email:hover {
  border-color: var(--accent-cyan);
  background: rgba(34, 211, 238, 0.1);
}

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

  .btn-submit {
    width: fit-content;
  }
}

@media (min-width: 768px) {
  .contact-form-section {
    padding: var(--space-xl) 0 var(--space-3xl);
  }

  .contact-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: start;
  }
}

/* ==========================================================================
   15. Footer
   ========================================================================== */

.site-footer {
  background: var(--bg-black);
  padding: var(--space-xl) 0 var(--space-lg);
  border-top: 1px solid var(--border-color);
}

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

.footer-brand {
  grid-column: 1 / -1;
}

.footer-logo {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1.25rem;
  background: var(--accent-purple);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-sm);
}

.footer-logo-icon {
  width: 28px;
  height: 28px;
  margin-right: 10px;
  border-radius: 50%;
}

.footer-logo span {
  color: var(--text-white);
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}

.footer-tagline {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-links h4,
.footer-contact h4 {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-white);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
}

.footer-links a,
.footer-contact a {
  display: block;
  color: var(--text-gray);
  font-size: 0.85rem;
  margin-bottom: var(--space-sm);
  transition: color var(--transition-fast);
  padding: 0.25rem 0;
}

.footer-links a:hover,
.footer-contact a:hover {
  color: var(--text-white);
}

.footer-bottom {
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border-color);
}

.copyright {
  color: var(--text-muted);
  font-size: 0.75rem;
}

@media (min-width: 768px) {
  .site-footer {
    padding: var(--space-2xl) 0 var(--space-lg);
  }

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }

  .footer-brand {
    grid-column: auto;
  }
}

/* ==========================================================================
   16. Animations
   ========================================================================== */

.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s var(--ease-out-expo), transform 0.6s var(--ease-out-expo);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger delays */
.services-grid .service-card:nth-child(1) { transition-delay: 0.05s; }
.services-grid .service-card:nth-child(2) { transition-delay: 0.1s; }
.services-grid .service-card:nth-child(3) { transition-delay: 0.15s; }
.services-grid .service-card:nth-child(4) { transition-delay: 0.2s; }
.services-grid .service-card:nth-child(5) { transition-delay: 0.25s; }
.services-grid .service-card:nth-child(6) { transition-delay: 0.3s; }

.features-grid .feature-card:nth-child(1) { transition-delay: 0.05s; }
.features-grid .feature-card:nth-child(2) { transition-delay: 0.1s; }
.features-grid .feature-card:nth-child(3) { transition-delay: 0.15s; }
.features-grid .feature-card:nth-child(4) { transition-delay: 0.2s; }

/* ==========================================================================
   17. Reduced Motion
   ========================================================================== */

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

  .hero-headline .word {
    transform: none;
    animation: none;
  }

  .hero-subtitle,
  .hero-cta,
  .scroll-indicator {
    opacity: 1;
    transform: none;
    animation: none;
  }

  .fade-in {
    opacity: 1;
    transform: none;
  }
}