/* ==========================================================================
   VRINDA INFOTECH - MODERN 3D ICT WEBSITE
   Global Stylesheet & Design Tokens
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400&family=Space+Grotesk:wght@500;600;700;800&display=swap');

:root {
  /* Color Palette - Dark Cyber Tech Theme */
  --bg-primary: #080c15;
  --bg-secondary: #0d1424;
  --bg-tertiary: #131c31;
  --bg-card: rgba(17, 25, 43, 0.7);
  --bg-card-hover: rgba(23, 34, 58, 0.85);
  --bg-glass: rgba(15, 23, 42, 0.65);
  --bg-glass-strong: rgba(13, 20, 37, 0.85);
  
  /* Vibrant Accent Gradients */
  --accent-cyan: #00f0ff;
  --accent-blue: #3b82f6;
  --accent-violet: #8b5cf6;
  --accent-purple: #a855f7;
  --accent-pink: #ec4899;
  
  --grad-primary: linear-gradient(135deg, #00f0ff 0%, #3b82f6 50%, #8b5cf6 100%);
  --grad-secondary: linear-gradient(135deg, #8b5cf6 0%, #d946ef 100%);
  --grad-accent: linear-gradient(135deg, #00f0ff 0%, #60a5fa 100%);
  --grad-dark: linear-gradient(180deg, rgba(8, 12, 21, 0.8) 0%, rgba(13, 20, 36, 0.95) 100%);
  --grad-card: linear-gradient(145deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.01) 100%);
  --grad-glow: radial-gradient(circle at 50% 50%, rgba(0, 240, 255, 0.15) 0%, rgba(139, 92, 246, 0.05) 60%, transparent 100%);

  /* Typography */
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Text Colors */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-accent: #38bdf8;

  /* Borders & Highlights */
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glass: rgba(255, 255, 255, 0.12);
  --border-glow: rgba(0, 240, 255, 0.35);
  --border-hover: rgba(139, 92, 246, 0.4);

  /* Shadows & Glows */
  --shadow-glass: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --glow-cyan: 0 0 25px rgba(0, 240, 255, 0.3);
  --glow-violet: 0 0 30px rgba(139, 92, 246, 0.35);
  --glow-subtle: 0 0 40px rgba(59, 130, 246, 0.15);

  /* Spacing & Layout */
  --max-width: 1280px;
  --header-height: 80px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-pill: 9999px;

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ==========================================================================
   CSS Reset & Base
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  font-size: 16px;
  color-scheme: dark;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Background Cyber Grid Pattern */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(circle at 15% 20%, rgba(0, 240, 255, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 85% 60%, rgba(139, 92, 246, 0.09) 0%, transparent 45%),
    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: 100% 100%, 100% 100%, 48px 48px, 48px 48px;
  pointer-events: none;
  z-index: -1;
}

/* Dynamic Ambient Glow Orbs */
.ambient-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.6;
}

.ambient-glow-1 {
  top: 10%;
  right: -5%;
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, rgba(0, 240, 255, 0.2), transparent 70%);
}

.ambient-glow-2 {
  top: 45%;
  left: -8%;
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.18), transparent 70%);
}

.ambient-glow-3 {
  bottom: 15%;
  right: -5%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.16), transparent 70%);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-pill);
  border: 2px solid var(--bg-primary);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-cyan);
}

/* Typography Base */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.02em;
}

p {
  color: var(--text-secondary);
  font-weight: 400;
}

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

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

button, input, select, textarea {
  font-family: inherit;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
  position: relative;
  z-index: 1;
}

/* Section Common Structure */
.section {
  padding: 6.5rem 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 4rem auto;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 1rem;
  border-radius: var(--radius-pill);
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid rgba(0, 240, 255, 0.25);
  color: var(--accent-cyan);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1.25rem;
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.15);
}

.section-badge svg {
  width: 14px;
  height: 14px;
}

.section-title {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  margin-bottom: 1rem;
}

.section-desc {
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.text-gradient {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gradient-cyan {
  background: linear-gradient(135deg, #00f0ff, #38bdf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-gradient-violet {
  background: linear-gradient(135deg, #8b5cf6, #c084fc);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 100;
  transition: background-color var(--transition-normal), 
              backdrop-filter var(--transition-normal), 
              border-color var(--transition-normal),
              box-shadow var(--transition-normal);
  background: transparent;
  border-bottom: 1px solid transparent;
}

.site-header.scrolled {
  background: rgba(8, 12, 21, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-glass);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

/* Logo */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.03em;
  position: relative;
}

.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.2), rgba(139, 92, 246, 0.2));
  border: 1px solid rgba(0, 240, 255, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.25);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.brand-logo:hover .brand-icon {
  transform: rotate(5deg) scale(1.05);
  box-shadow: var(--glow-cyan);
}

.brand-icon svg {
  width: 22px;
  height: 22px;
}

.brand-text span {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Nav Links */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-link {
  font-size: 0.925rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 0.5rem 0;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--grad-primary);
  border-radius: var(--radius-pill);
  transition: width var(--transition-fast);
}

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

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

/* Hamburger Menu Toggle */
.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  width: 44px;
  height: 44px;
  padding: 10px;
  flex-direction: column;
  justify-content: space-around;
  z-index: 110;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
}

.mobile-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.mobile-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

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

/* ==========================================================================
   Hero Section Layout
   ========================================================================== */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--header-height) + 2rem);
  padding-bottom: 5rem;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 3rem;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  background: rgba(139, 92, 246, 0.1);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: var(--radius-pill);
  color: #c084fc;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  box-shadow: 0 0 20px rgba(139, 92, 246, 0.2);
}

.badge-pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-cyan);
  box-shadow: 0 0 10px var(--accent-cyan);
  animation: pulseGlow 2s infinite;
}

.hero-headline {
  font-size: clamp(2.5rem, 4.75vw, 4rem);
  font-weight: 800;
  line-height: 1.12;
  margin-bottom: 1.5rem;
  letter-spacing: -0.03em;
}

.hero-subheadline {
  font-size: 1.2rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  max-width: 580px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin-bottom: 3.5rem;
}

.hero-trust-bar {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-subtle);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
}

.trust-item svg {
  width: 18px;
  height: 18px;
  color: var(--accent-cyan);
}

/* 3D Canvas Container */
.hero-visual {
  position: relative;
  width: 100%;
  height: 520px;
  display: flex;
  align-items: center;
  justify-content: center;
}

#three-canvas-container {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  border-radius: var(--radius-xl);
  overflow: hidden;
  z-index: 1;
}

#three-canvas {
  width: 100%;
  height: 100%;
  display: block;
  outline: none;
}

.hero-visual-badge {
  position: absolute;
  bottom: 25px;
  left: 20px;
  z-index: 5;
  background: var(--bg-glass-strong);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-glass);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  box-shadow: var(--shadow-glass);
}

.hero-visual-badge .badge-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: rgba(0, 240, 255, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
}

.hero-visual-badge .badge-text {
  font-size: 0.8rem;
  line-height: 1.3;
}

.hero-visual-badge .badge-text strong {
  display: block;
  color: var(--text-primary);
  font-size: 0.875rem;
}

/* Fallback 3D Geometric Scene if Three.js fails or is disabled */
.canvas-fallback {
  width: 320px;
  height: 320px;
  position: relative;
  perspective: 1000px;
  display: none; /* activated via JS if WebGL unsupported */
}

.cube-cluster {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  animation: rotate3DFallback 18s infinite linear;
}

.fallback-ring {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  border: 2px dashed rgba(0, 240, 255, 0.5);
  box-shadow: 0 0 25px rgba(0, 240, 255, 0.2);
}

.fallback-ring:nth-child(2) {
  transform: rotateX(60deg) rotateY(20deg);
  border-color: rgba(139, 92, 246, 0.6);
  box-shadow: 0 0 25px rgba(139, 92, 246, 0.2);
}

.fallback-ring:nth-child(3) {
  transform: rotateX(-60deg) rotateY(45deg);
  border-color: rgba(59, 130, 246, 0.6);
}

.fallback-core {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: radial-gradient(circle, #00f0ff 0%, #8b5cf6 60%, transparent 100%);
  box-shadow: 0 0 50px rgba(0, 240, 255, 0.6);
  filter: blur(4px);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-glass);
  padding: 5rem 0 2.5rem 0;
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 240, 255, 0.6), rgba(139, 92, 246, 0.6), transparent);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
  gap: 3rem;
  margin-bottom: 4rem;
}

.footer-brand p {
  margin: 1.25rem 0 1.5rem 0;
  font-size: 0.95rem;
  line-height: 1.7;
}

.footer-heading {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
  position: relative;
  display: inline-block;
}

.footer-heading::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 24px;
  height: 2px;
  background: var(--accent-cyan);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.925rem;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.footer-links a:hover {
  color: var(--accent-cyan);
  transform: translateX(4px);
}

.footer-newsletter p {
  font-size: 0.925rem;
  margin-bottom: 1rem;
}

.newsletter-form {
  display: flex;
  gap: 0.5rem;
}

.newsletter-input {
  flex: 1;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-pill);
  padding: 0.75rem 1.25rem;
  color: var(--text-primary);
  font-size: 0.875rem;
  outline: none;
  transition: border-color var(--transition-fast);
}

.newsletter-input:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer-legal {
  display: flex;
  gap: 1.5rem;
}

.footer-legal a:hover {
  color: var(--text-secondary);
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-subheadline {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-cta-group {
    justify-content: center;
  }

  .hero-trust-bar {
    justify-content: center;
  }

  .hero-visual {
    height: 420px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 768px) {
  .mobile-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 380px;
    height: 100vh;
    background: rgba(13, 20, 36, 0.98);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-left: 1px solid var(--border-glass);
    flex-direction: column;
    align-items: flex-start;
    padding: 6rem 2.5rem 2rem 2.5rem;
    gap: 1.5rem;
    transition: right var(--transition-smooth);
    z-index: 105;
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.7);
  }

  .nav-menu.open {
    right: 0;
  }

  .nav-link {
    font-size: 1.15rem;
    width: 100%;
    padding: 0.75rem 0;
  }

  .nav-actions .btn-quote {
    display: none; /* shown inside mobile drawer */
  }

  .mobile-drawer-cta {
    display: block !important;
    width: 100%;
    margin-top: 1rem;
  }

  .section {
    padding: 4.5rem 0;
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}