/* ==========================================================================
   Cortex Grid - Design System & Global Styles
   Strictly Bootstrap 5.3 Compliant
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

:root {
  --vt-bg-canvas: #070b14;
  --vt-bg-surface: #0e1526;
  --vt-bg-surface-elevated: #151f38;
  --vt-bg-surface-hover: #1a2745;
  --vt-border-subtle: rgba(255, 255, 255, 0.08);
  --vt-border-medium: rgba(255, 255, 255, 0.16);
  --vt-border-focus: #3b82f6;
  --vt-text-primary: #f8fafc;
  --vt-text-secondary: #94a3b8;
  --vt-text-muted: #64748b;
  --vt-accent-primary: #2563eb;
  --vt-accent-primary-hover: #1d4ed8;
  --vt-accent-cyan: #06b6d4;
  --vt-accent-emerald: #10b981;
  --vt-font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --vt-font-mono: 'IBM Plex Mono', monospace;
}

/* Base resets & typography */
body {
  font-family: var(--vt-font-sans);
  background-color: var(--vt-bg-canvas);
  color: var(--vt-text-secondary);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6, .h1, .h2, .h3, .h4, .h5, .h6 {
  color: var(--vt-text-primary);
  font-weight: 700;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

.font-mono-numbers {
  font-family: var(--vt-font-mono);
  font-variant-numeric: tabular-nums;
}

/* Navbar contract */
.vt-navbar {
  background-color: rgba(7, 11, 20, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--vt-border-subtle);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 1030;
}

.vt-brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.03em;
  color: var(--vt-text-primary);
  text-decoration: none;
  white-space: nowrap;
}

.vt-brand-icon {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-weight: 800;
  font-size: 0.95rem;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.vt-nav-link {
  color: var(--vt-text-secondary) !important;
  font-size: 0.925rem;
  font-weight: 500;
  padding: 0.5rem 0.85rem !important;
  transition: color 0.15s ease-in-out;
  white-space: nowrap;
  position: relative;
}

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

.vt-nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0px;
  left: 0.85rem;
  right: 0.85rem;
  height: 2px;
  background-color: var(--vt-accent-primary);
  border-radius: 2px;
}

/* Buttons */
.btn-vt-primary {
  background-color: var(--vt-accent-primary);
  border-color: var(--vt-accent-primary);
  color: #ffffff;
  font-weight: 600;
  padding: 0.65rem 1.35rem;
  border-radius: 8px;
  white-space: nowrap;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-vt-primary:hover,
.btn-vt-primary:focus {
  background-color: var(--vt-accent-primary-hover);
  border-color: var(--vt-accent-primary-hover);
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
}

.btn-vt-secondary {
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--vt-border-subtle);
  color: var(--vt-text-primary);
  font-weight: 500;
  padding: 0.65rem 1.35rem;
  border-radius: 8px;
  white-space: nowrap;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-vt-secondary:hover,
.btn-vt-secondary:focus {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: var(--vt-border-medium);
  color: #ffffff;
}

/* Card surfaces */
.vt-card {
  background-color: var(--vt-bg-surface);
  border: 1px solid var(--vt-border-subtle);
  border-radius: 12px;
  padding: 1.75rem;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  height: 100%;
}

.vt-card:hover {
  border-color: var(--vt-border-medium);
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
}

.vt-card-elevated {
  background-color: var(--vt-bg-surface-elevated);
}

/* Hero Section */
.vt-hero {
  position: relative;
  padding: 5.5rem 0 4.5rem;
  background: radial-gradient(circle at 50% 0%, rgba(37, 99, 235, 0.12) 0%, rgba(7, 11, 20, 0) 70%);
}

.vt-hero-title {
  font-size: clamp(2.35rem, 5vw, 3.85rem);
  line-height: 1.15;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 1.25rem;
}

.vt-hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--vt-text-secondary);
  max-width: 680px;
  margin-bottom: 2rem;
  line-height: 1.6;
}

.vt-hero-banner-container {
  position: relative;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--vt-border-medium);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  background-color: var(--vt-bg-surface);
}

.vt-hero-banner-img {
  width: 100%;
  height: 440px;
  object-fit: cover;
  display: block;
}

.vt-hero-banner-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 11, 20, 0.15) 0%, rgba(7, 11, 20, 0.85) 100%);
  display: flex;
  align-items: flex-end;
  padding: 1.75rem;
}

/* Tech Stack Tags & Interactive Filter */
.vt-tech-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  background-color: var(--vt-bg-surface);
  padding: 0.4rem;
  border-radius: 10px;
  border: 1px solid var(--vt-border-subtle);
}

.vt-tech-filter-btn {
  background: transparent;
  border: none;
  color: var(--vt-text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.45rem 0.95rem;
  border-radius: 6px;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s ease;
}

.vt-tech-filter-btn:hover {
  color: var(--vt-text-primary);
}

.vt-tech-filter-btn.active {
  background-color: var(--vt-accent-primary);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.4);
}

.vt-tech-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--vt-bg-surface);
  border: 1px solid var(--vt-border-subtle);
  border-radius: 8px;
  padding: 0.65rem 1rem;
  color: var(--vt-text-primary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s ease;
}

.vt-tech-badge:hover {
  border-color: var(--vt-accent-primary);
  background-color: var(--vt-bg-surface-elevated);
  transform: translateY(-2px);
}

.vt-tech-icon {
  width: 20px;
  height: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
}

/* Editorial Chapter Number */
.vt-editorial-num {
  font-family: var(--vt-font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--vt-accent-cyan);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
  display: block;
}

/* Service Pillars */
.vt-service-pillar-card {
  position: relative;
  background-color: var(--vt-bg-surface);
  border: 1px solid var(--vt-border-subtle);
  border-radius: 14px;
  padding: 2.25rem 2rem;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.vt-service-pillar-card:hover {
  border-color: var(--vt-border-medium);
  background-color: var(--vt-bg-surface-elevated);
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
}

.vt-service-icon-box {
  width: 52px;
  height: 52px;
  border-radius: 10px;
  background: rgba(37, 99, 235, 0.12);
  border: 1px solid rgba(37, 99, 235, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #60a5fa;
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
}

/* Portfolio & Case Study */
.vt-portfolio-preview-card {
  background-color: var(--vt-bg-surface);
  border: 1px solid var(--vt-border-subtle);
  border-radius: 14px;
  overflow: hidden;
  transition: all 0.25s ease;
}

.vt-portfolio-preview-card:hover {
  border-color: var(--vt-border-medium);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
}

.vt-portfolio-img-wrap {
  position: relative;
  overflow: hidden;
  cursor: pointer;
  background-color: #030712;
}

.vt-portfolio-img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  transition: transform 0.35s ease;
}

.vt-portfolio-preview-card:hover .vt-portfolio-img {
  transform: scale(1.025);
}

.vt-portfolio-overlay-inspect {
  position: absolute;
  inset: 0;
  background-color: rgba(7, 11, 20, 0.6);
  opacity: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.2s ease;
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 600;
  gap: 0.5rem;
}

.vt-portfolio-img-wrap:hover .vt-portfolio-overlay-inspect {
  opacity: 1;
}

/* Pricing Section */
.vt-pricing-card {
  background-color: var(--vt-bg-surface);
  border: 1px solid var(--vt-border-subtle);
  border-radius: 14px;
  padding: 2.25rem 2rem;
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
  transition: all 0.25s ease;
}

.vt-pricing-card.featured {
  background: linear-gradient(180deg, #131c33 0%, #0d1527 100%);
  border-color: rgba(37, 99, 235, 0.5);
  box-shadow: 0 12px 35px rgba(37, 99, 235, 0.15);
}

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

.vt-pricing-badge {
  position: absolute;
  top: -12px;
  right: 24px;
  background: linear-gradient(135deg, #2563eb, #06b6d4);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
}

.vt-price-amount {
  font-size: 2.85rem;
  font-weight: 800;
  color: #ffffff;
  font-family: var(--vt-font-mono);
  line-height: 1;
}

.vt-price-period {
  color: var(--vt-text-muted);
  font-size: 0.95rem;
}

/* Metric Highlights */
.vt-metric-strip {
  border-top: 1px solid var(--vt-border-subtle);
  border-bottom: 1px solid var(--vt-border-subtle);
  background-color: rgba(14, 21, 38, 0.4);
  padding: 2.5rem 0;
}

.vt-metric-value {
  font-size: 2.5rem;
  font-weight: 800;
  color: #ffffff;
  font-family: var(--vt-font-mono);
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.vt-metric-label {
  font-size: 0.875rem;
  color: var(--vt-text-muted);
  margin-top: 0.25rem;
}

/* Contact Details Card */
.vt-contact-info-panel {
  background: linear-gradient(180deg, #10182b 0%, #0a101f 100%);
  border: 1px solid var(--vt-border-subtle);
  border-radius: 14px;
  padding: 2.5rem;
}

.vt-contact-item {
  display: flex;
  gap: 1.15rem;
  margin-bottom: 1.75rem;
}

.vt-contact-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background-color: rgba(37, 99, 235, 0.12);
  border: 1px solid rgba(37, 99, 235, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #60a5fa;
  font-size: 1.25rem;
  flex-shrink: 0;
}

/* Form inputs */
.vt-form-control,
.vt-form-select {
  background-color: var(--vt-bg-surface-elevated) !important;
  border: 1px solid var(--vt-border-subtle) !important;
  color: var(--vt-text-primary) !important;
  border-radius: 8px !important;
  padding: 0.75rem 1rem !important;
  font-size: 0.95rem !important;
  transition: border-color 0.15s ease, box-shadow 0.15s ease !important;
}

.vt-form-control:focus,
.vt-form-select:focus {
  border-color: var(--vt-accent-primary) !important;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.25) !important;
}

.vt-form-control::placeholder {
  color: var(--vt-text-muted) !important;
}

.vt-form-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--vt-text-primary);
  margin-bottom: 0.4rem;
}

/* Footer */
.vt-footer {
  background-color: #04070d;
  border-top: 1px solid var(--vt-border-subtle);
  padding: 4rem 0 2.5rem;
  color: var(--vt-text-secondary);
  font-size: 0.9rem;
}

.vt-footer .text-muted {
  color: var(--vt-text-secondary) !important;
}

.vt-footer-heading {
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--vt-text-primary);
  margin-bottom: 1.25rem;
}

.vt-footer-link {
  color: var(--vt-text-secondary);
  text-decoration: none;
  display: block;
  margin-bottom: 0.65rem;
  transition: color 0.15s ease;
}

.vt-footer-link:hover {
  color: #ffffff;
}

.bg-dark {
  background-color: var(--vt-bg-surface-elevated) !important;
}

/* Footer delivery coverage box high contrast */
.vt-footer-info-box,
.vt-footer .bg-dark {
  background-color: var(--vt-bg-surface) !important;
  border: 1px solid var(--vt-border-subtle) !important;
  color: var(--vt-text-secondary) !important;
}

.vt-footer-info-box span.text-white,
.vt-footer .bg-dark span.text-white {
  color: #ffffff !important;
}

.hover-white {
  transition: color 0.15s ease;
}

.hover-white:hover {
  color: #ffffff !important;
}

/* Modal Dark Theme Overrides */
.modal-content.vt-modal-content {
  background-color: var(--vt-bg-surface);
  border: 1px solid var(--vt-border-medium);
  border-radius: 14px;
  color: var(--vt-text-secondary);
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.7);
}

.modal-header.vt-modal-header {
  border-bottom: 1px solid var(--vt-border-subtle);
}

.modal-footer.vt-modal-footer {
  border-top: 1px solid var(--vt-border-subtle);
}

.btn-close-white-custom {
  filter: invert(1) grayscale(100%) brightness(200%);
}

/* Accordion Custom Styling */
.vt-accordion .accordion-item {
  background-color: var(--vt-bg-surface);
  border: 1px solid var(--vt-border-subtle);
  margin-bottom: 0.75rem;
  border-radius: 10px !important;
  overflow: hidden;
}

.vt-accordion .accordion-button {
  background-color: var(--vt-bg-surface);
  color: var(--vt-text-primary);
  font-weight: 600;
  padding: 1.15rem 1.35rem;
  box-shadow: none !important;
}

.vt-accordion .accordion-button:not(.collapsed) {
  background-color: var(--vt-bg-surface-elevated);
  color: #60a5fa;
}

.vt-accordion .accordion-button::after {
  filter: invert(1);
}

.vt-accordion .accordion-body {
  background-color: var(--vt-bg-surface-elevated);
  color: var(--vt-text-secondary);
  border-top: 1px solid var(--vt-border-subtle);
  padding: 1.25rem 1.35rem;
  font-size: 0.95rem;
}

/* Utilities */
.text-cyan {
  color: var(--vt-accent-cyan) !important;
}

.text-blue-glow {
  color: #60a5fa !important;
}

.border-subtle {
  border-color: var(--vt-border-subtle) !important;
}

/* Responsive tweaks */
@media (max-width: 991.98px) {
  .vt-hero {
    padding: 3.5rem 0 3rem;
  }
  .vt-hero-banner-img {
    height: 280px;
  }
  .vt-nav-link.active::after {
    display: none;
  }
}

/* Legal Documents Styling (Privacy Policy & Terms of Service) */
.vt-legal-card {
  background-color: var(--vt-bg-surface);
  border: 1px solid var(--vt-border-subtle);
  border-radius: 14px;
  padding: 2.5rem;
}

@media (max-width: 767.98px) {
  .vt-legal-card {
    padding: 1.5rem;
  }
}

.vt-legal-section {
  padding-bottom: 2rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--vt-border-subtle);
}

.vt-legal-section:last-child {
  border-bottom: none;
  padding-bottom: 0;
  margin-bottom: 0;
}

.vt-legal-section h2 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--vt-text-primary);
  margin-bottom: 1rem;
}

.vt-legal-list {
  padding-left: 1.25rem;
  margin-bottom: 1rem;
}

.vt-legal-list li {
  margin-bottom: 0.65rem;
  color: var(--vt-text-secondary);
}

.vt-legal-list li strong {
  color: var(--vt-text-primary);
}

.vt-legal-quicknav {
  position: sticky;
  top: 90px;
}

.vt-legal-quicknav a {
  display: block;
  font-size: 0.85rem;
  color: var(--vt-text-muted);
  text-decoration: none;
  padding: 0.4rem 0.75rem;
  border-left: 2px solid transparent;
  transition: all 0.15s ease;
}

.vt-legal-quicknav a:hover {
  color: var(--vt-accent-cyan);
  border-left-color: var(--vt-accent-cyan);
}