:root {
  /* Color Palette */
  --bg-primary: #0a0f1d;
  --bg-secondary: #0f172a;
  --bg-card: #141f36;
  --bg-card-hover: #1a2947;
  --bg-surface: #1e293b;
  --bg-light: #f8fafc;
  --bg-light-alt: #f1f5f9;

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-dark: #0f172a;
  --text-dark-muted: #475569;

  --accent-blue: #0284c7;
  --accent-electric: #0ea5e9;
  --accent-cyan: #06b6d4;
  --accent-glow: rgba(14, 165, 233, 0.25);
  --accent-glow-subtle: rgba(6, 182, 212, 0.12);

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-active: rgba(14, 165, 233, 0.4);
  --border-light: #e2e8f0;

  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 25px rgba(14, 165, 233, 0.25);
}

/* Reset & Box Sizing */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* PCB / Circuit Background Texture Utility */
.circuit-bg {
  background-image: 
    radial-gradient(circle at 10% 20%, rgba(14, 165, 233, 0.05) 0%, transparent 20%),
    radial-gradient(circle at 90% 80%, rgba(6, 182, 212, 0.04) 0%, transparent 25%),
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 36px 36px, 36px 36px;
}

.container {
  width: 100%;
  max-width: 1400px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* Header & Sticky Nav */
.header-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10, 15, 29, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-fast);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 72px;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--text-primary);
  flex-shrink: 0;
}

.brand-logo img {
  height: 40px;
  width: auto;
  object-fit: contain;
  border-radius: 6px;
  background: #ffffff;
  padding: 2px 4px;
  box-shadow: 0 0 10px rgba(0,0,0,0.3);
}

.brand-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--accent-electric), var(--accent-cyan));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 15px var(--accent-glow);
}

.brand-name {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.brand-name span {
  color: var(--accent-electric);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: nowrap;
}

.nav-menu li {
  display: flex;
  align-items: center;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  padding: 0.35rem 0.45rem;
  border-radius: 4px;
  white-space: nowrap;
  position: relative;
  display: inline-flex;
  align-items: center;
}

.nav-link:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.nav-link.active {
  color: #38bdf8;
  font-weight: 600;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0.4rem;
  right: 0.4rem;
  height: 2px;
  background: var(--accent-electric);
  border-radius: 2px;
  box-shadow: 0 0 8px var(--accent-electric);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 0.925rem;
  font-weight: 600;
  padding: 0.65rem 1.4rem;
  border-radius: 6px;
  text-decoration: none;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-electric));
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(14, 165, 233, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #0274b3, var(--accent-blue));
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(14, 165, 233, 0.45);
}

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

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--accent-electric);
}

.btn-outline {
  background: transparent;
  color: var(--accent-cyan);
  border-color: rgba(6, 182, 212, 0.4);
}

.btn-outline:hover {
  background: rgba(6, 182, 212, 0.1);
  border-color: var(--accent-cyan);
}

.btn-sm {
  padding: 0.4rem 0.9rem;
  font-size: 0.825rem;
}

/* Badges & Tags */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 9999px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-msme {
  background: rgba(14, 165, 233, 0.12);
  color: var(--accent-electric);
  border: 1px solid rgba(14, 165, 233, 0.3);
}

.badge-demo {
  background: rgba(245, 158, 11, 0.12);
  color: var(--warning);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

/* Sections */
.section {
  padding: 5rem 0;
  position: relative;
}

.section-title-wrap {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 3.5rem auto;
}

.section-tag {
  color: var(--accent-cyan);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
  display: inline-block;
}

.section-heading {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.25;
  margin-bottom: 1rem;
}

.section-subheading {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

/* Cards & Grids */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

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

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

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 2rem;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.card:hover {
  border-color: var(--border-active);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 8px;
  background: rgba(14, 165, 233, 0.1);
  border: 1px solid rgba(14, 165, 233, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-electric);
  margin-bottom: 1.5rem;
}

/* Forms */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  transition: border-color var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--accent-electric);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.2);
}

select.form-control {
  background-color: #0f172a;
  cursor: pointer;
}

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

/* Floating WhatsApp Button */
.floating-whatsapp {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: #25d366;
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 18px rgba(37, 211, 102, 0.4);
  z-index: 999;
  transition: transform var(--transition-fast);
  text-decoration: none;
}

.floating-whatsapp:hover {
  transform: scale(1.08);
}

/* Footer */
.footer {
  background: #060913;
  border-top: 1px solid var(--border-subtle);
  padding: 4.5rem 0 2rem 0;
  color: var(--text-secondary);
  font-size: 0.925rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1.5fr;
  gap: 2.5rem;
  margin-bottom: 3.5rem;
}

.footer-col h4 {
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  letter-spacing: -0.01em;
}

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

.footer-col li {
  margin-bottom: 0.65rem;
}

.footer-col a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
}

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

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 1280px) {
  .nav-menu {
    gap: 0.4rem;
  }
  .nav-link {
    font-size: 0.8rem;
    padding: 0.3rem 0.35rem;
  }
}

@media (max-width: 1100px) {
  .mobile-toggle {
    display: block;
  }

  .nav-menu {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: #0a0f1d;
    border-bottom: 1px solid var(--border-subtle);
    padding: 1.5rem;
    gap: 0.75rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
  }

  .nav-menu.open {
    display: flex;
  }
}

@media (max-width: 768px) {

  .grid-3, .grid-2, .grid-4 {
    grid-template-columns: 1fr;
  }

  .section-heading {
    font-size: 1.75rem;
  }

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