/* ============================================================
   XelNet Technologies Inc. — Master Stylesheet
   Color Scheme: Red + Grey/White | Light Mode Only
   ============================================================ */

/* --- CSS Custom Properties --- */
:root {
  /* Red Palette */
  --red-50: #FEF2F2;
  --red-100: #FEE2E2;
  --red-200: #FECACA;
  --red-300: #FCA5A5;
  --red-400: #F87171;
  --red-500: #EF4444;
  --red-600: #DC2626;
  --red-700: #B91C1C;
  --red-800: #991B1B;
  --red-900: #7F1D1D;

  /* Grey Palette */
  --grey-50: #F9FAFB;
  --grey-100: #F3F4F6;
  --grey-200: #E5E7EB;
  --grey-300: #D1D5DB;
  --grey-400: #9CA3AF;
  --grey-500: #6B7280;
  --grey-600: #4B5563;
  --grey-700: #374151;
  --grey-800: #1F2937;
  --grey-900: #111827;

  /* Semantic Colors */
  --bg-primary: #FFFFFF;
  --bg-secondary: var(--grey-50);
  --bg-tertiary: var(--grey-100);
  --text-primary: var(--grey-900);
  --text-secondary: var(--grey-700);
  --text-muted: var(--grey-500);
  --text-light: var(--grey-400);
  --accent: var(--red-600);
  --accent-dark: var(--red-700);
  --accent-light: var(--red-50);
  --accent-border: var(--red-200);
  --border: var(--grey-200);
  --border-light: var(--grey-100);
  --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);
  --shadow-card: 0 1px 3px 0 rgba(0,0,0,0.06), 0 1px 2px -1px rgba(0,0,0,0.04);
  --shadow-card-hover: 0 12px 24px -4px rgba(0,0,0,0.1), 0 4px 8px -2px rgba(0,0,0,0.06);
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

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

  /* Spacing */
  --container-max: 1200px;
  --container-wide: 1340px;
  --nav-height: 72px;
  --section-padding: 80px;
}

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

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

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

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

::selection {
  background-color: var(--red-200);
  color: var(--red-900);
}

/* --- Utility Classes --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.container-wide {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: var(--section-padding) 0;
}

.section-alt {
  background-color: var(--bg-secondary);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.section-label::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 2px;
  background-color: var(--accent);
  border-radius: 1px;
}

.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 17px;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 600px;
}

.section-header {
  margin-bottom: 48px;
}

.section-header.centered {
  text-align: center;
}

.section-header.centered .section-subtitle {
  margin: 0 auto;
}

.text-accent {
  color: var(--accent);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  white-space: nowrap;
  line-height: 1;
}

.btn-primary {
  background-color: var(--accent);
  color: #FFFFFF;
  box-shadow: 0 1px 2px rgba(220, 38, 38, 0.25);
}

.btn-primary:hover {
  background-color: var(--accent-dark);
  box-shadow: 0 4px 12px rgba(220, 38, 38, 0.3);
  transform: translateY(-1px);
}

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

.btn-secondary:hover {
  border-color: var(--grey-300);
  background-color: var(--grey-50);
  transform: translateY(-1px);
}

.btn-ghost {
  color: var(--accent);
  padding: 12px 16px;
  font-weight: 600;
}

.btn-ghost:hover {
  color: var(--accent-dark);
}

.btn-ghost svg,
.btn-ghost .arrow-icon {
  transition: transform 0.25s ease;
}

.btn-ghost:hover svg,
.btn-ghost:hover .arrow-icon {
  transform: translateX(4px);
}

.btn-sm {
  font-size: 13px;
  padding: 8px 20px;
}

.btn-lg {
  font-size: 15px;
  padding: 14px 32px;
}

/* --- Navigation --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 1000;
  transition: box-shadow 0.3s ease, background-color 0.3s ease;
}

.navbar.scrolled {
  box-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  background-color: rgba(255, 255, 255, 0.95);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  z-index: 1001;
}

.logo-mark {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--red-600), var(--red-700));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.logo-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--grey-900);
  letter-spacing: -0.02em;
}

.logo-sub {
  font-size: 10px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
  position: relative;
}

.nav-link:hover {
  color: var(--text-primary);
  background-color: var(--grey-50);
}

.nav-link.active {
  color: var(--accent);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 16px;
  right: 16px;
  height: 2px;
  background-color: var(--accent);
  border-radius: 1px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-cta {
  font-size: 13px;
  font-weight: 600;
  color: #FFFFFF;
  background-color: var(--accent);
  padding: 9px 20px;
  border-radius: var(--radius-sm);
  transition: all 0.25s ease;
}

.nav-cta:hover {
  background-color: var(--accent-dark);
  box-shadow: 0 4px 12px rgba(220, 38, 38, 0.25);
}

/* Mobile Menu Toggle */
.mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  border-radius: var(--radius-sm);
  z-index: 1001;
}

.mobile-toggle:hover {
  background-color: var(--grey-50);
}

.mobile-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--grey-700);
  border-radius: 1px;
  transition: all 0.3s ease;
  transform-origin: center;
}

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

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

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

/* Mobile Menu Overlay */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  background-color: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  z-index: 999;
  padding-top: calc(var(--nav-height) + 24px);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.mobile-menu.open {
  opacity: 1;
}

.mobile-menu-inner {
  display: flex;
  flex-direction: column;
  padding: 24px;
  gap: 4px;
}

.mobile-menu .nav-link {
  font-size: 18px;
  padding: 14px 16px;
  border-radius: var(--radius-md);
}

.mobile-menu .nav-link:hover {
  background-color: var(--grey-50);
}

.mobile-menu .mobile-cta {
  margin-top: 16px;
  font-size: 16px;
  padding: 14px 24px;
  text-align: center;
}

/* --- Hero Section --- */
.hero {
  padding-top: calc(var(--nav-height) + 64px);
  padding-bottom: 80px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--red-100) 0%, transparent 70%);
  opacity: 0.6;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -100px;
  left: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--grey-100) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content {
  max-width: 560px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px 6px 6px;
  background-color: var(--accent-light);
  border: 1px solid var(--accent-border);
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
  color: var(--accent-dark);
  margin-bottom: 24px;
}

.hero-badge-dot {
  width: 22px;
  height: 22px;
  background-color: var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  font-size: 11px;
}

.hero-title {
  font-size: clamp(36px, 5vw, 52px);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--grey-900);
  margin-bottom: 20px;
}

.hero-description {
  font-size: 17px;
  line-height: 1.75;
  color: var(--text-secondary);
  margin-bottom: 36px;
  max-width: 480px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-trust {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.hero-trust-avatars {
  display: flex;
}

.hero-trust-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid #FFFFFF;
  margin-left: -8px;
  background-color: var(--grey-200);
  overflow: hidden;
}

.hero-trust-avatar:first-child {
  margin-left: 0;
}

.hero-trust-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-trust-text {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.4;
}

.hero-trust-text strong {
  color: var(--text-primary);
  font-weight: 600;
}

.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-image-wrapper {
  position: relative;
  width: 100%;
  max-width: 520px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--grey-200);
}

.hero-image-wrapper img {
  width: 100%;
  height: auto;
  aspect-ratio: 4/3;
  object-fit: cover;
}

.hero-floating-card {
  position: absolute;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border: 1px solid var(--grey-200);
  border-radius: var(--radius-lg);
  padding: 14px 18px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 12px;
  animation: float 4s ease-in-out infinite;
}

.hero-floating-card.card-1 {
  bottom: -20px;
  left: -30px;
  animation-delay: 0s;
}

.hero-floating-card.card-2 {
  top: -16px;
  right: -24px;
  animation-delay: 1.5s;
}

.floating-card-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.floating-card-icon.red {
  background-color: var(--accent-light);
  color: var(--accent);
}

.floating-card-icon.grey {
  background-color: var(--grey-100);
  color: var(--grey-700);
}

.floating-card-label {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 500;
}

.floating-card-value {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-8px); }
}

/* --- Partners / Logos Strip --- */
.partners {
  padding: 48px 0;
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.partners-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  text-align: center;
  margin-bottom: 32px;
}

.partners-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
}

.partner-logo {
  font-size: 18px;
  font-weight: 700;
  color: var(--grey-300);
  letter-spacing: -0.01em;
  transition: color 0.3s ease;
  user-select: none;
}

.partner-logo:hover {
  color: var(--grey-500);
}

/* --- Category Cards Grid --- */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.category-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--red-400));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.category-card:hover {
  border-color: var(--red-200);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

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

.category-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background-color: var(--accent-light);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  transition: all 0.3s ease;
}

.category-card:hover .category-icon {
  background-color: var(--accent);
  color: #FFFFFF;
}

.category-card h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.category-card p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.category-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.2s ease;
}

.category-link:hover {
  gap: 10px;
  color: var(--accent-dark);
}

/* --- Features / Why Choose --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.feature-card {
  display: flex;
  gap: 18px;
  padding: 24px;
  border-radius: var(--radius-lg);
  border: 1px solid transparent;
  transition: all 0.3s ease;
}

.feature-card:hover {
  background-color: var(--bg-primary);
  border-color: var(--border);
  box-shadow: var(--shadow-md);
}

.feature-number {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: var(--grey-100);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: all 0.3s ease;
}

.feature-card:hover .feature-number {
  background-color: var(--accent);
  color: #FFFFFF;
}

.feature-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.feature-card p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-muted);
}

/* --- Stats Section --- */
.stats {
  background: linear-gradient(135deg, var(--grey-900) 0%, var(--grey-800) 100%);
  padding: 64px 0;
  position: relative;
  overflow: hidden;
}

.stats::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(220, 38, 38, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  position: relative;
  z-index: 1;
}

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

.stat-number {
  font-size: clamp(32px, 4vw, 44px);
  font-weight: 700;
  color: #FFFFFF;
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: 8px;
}

.stat-number .stat-suffix {
  color: var(--red-400);
}

.stat-label {
  font-size: 14px;
  color: var(--grey-400);
  font-weight: 500;
}

/* --- Product Cards --- */
.products-filter {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.filter-btn {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  padding: 8px 18px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  transition: all 0.2s ease;
  background-color: var(--bg-primary);
}

.filter-btn:hover {
  color: var(--text-primary);
  border-color: var(--grey-300);
}

.filter-btn.active {
  background-color: var(--accent);
  color: #FFFFFF;
  border-color: var(--accent);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.product-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.product-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
  border-color: var(--grey-300);
}

.product-card-image {
  position: relative;
  aspect-ratio: 16/10;
  background-color: var(--grey-100);
  overflow: hidden;
}

.product-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.product-card:hover .product-card-image img {
  transform: scale(1.04);
}

.product-card-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background-color: rgba(255, 255, 255, 0.95);
  color: var(--accent);
  backdrop-filter: blur(4px);
}

.product-card-body {
  padding: 20px;
}

.product-card-code {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-light);
  letter-spacing: 0.05em;
  font-family: var(--font-mono);
  margin-bottom: 6px;
}

.product-card-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.3;
}

.product-card-desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.product-card-specs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}

.spec-tag {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
  background-color: var(--grey-50);
  border: 1px solid var(--grey-200);
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

.product-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid var(--border-light);
}

.product-card-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.2s ease, color 0.2s ease;
}

.product-card-link:hover {
  gap: 8px;
  color: var(--accent-dark);
}

/* --- Testimonials --- */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all 0.3s ease;
}

.testimonial-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--grey-300);
}

.testimonial-stars {
  display: flex;
  gap: 2px;
  margin-bottom: 16px;
  color: #F59E0B;
}

.testimonial-text {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 20px;