/* ==========================================================================
   ToT TECH ECOSYSTEM - PREMIUM MODERN LIGHT DESIGN SYSTEM
   Modern, High-Performance, SEO & GEO Optimized Stylesheet
   ========================================================================== */

:root {
  /* Color Tokens - Modern Clean Tech Light */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.85);
  
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-dim: #64748b;
  
  --accent-cyan: #0284c7;
  --accent-blue: #2563eb;
  --accent-purple: #7c3aed;
  --accent-pink: #e11d48;
  --accent-amber: #d97706;
  --accent-emerald: #059669;
  
  --gradient-primary: linear-gradient(135deg, #0284c7 0%, #2563eb 50%, #7c3aed 100%);
  --gradient-secondary: linear-gradient(135deg, #d97706 0%, #e11d48 100%);
  --gradient-emerald: linear-gradient(135deg, #059669 0%, #0284c7 100%);
  --gradient-card: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
  
  --border-subtle: #e2e8f0;
  --border-glow: rgba(2, 132, 199, 0.4);
  --border-active: #0284c7;
  
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 6px 18px -2px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 16px 36px -6px rgba(15, 23, 42, 0.09), 0 4px 12px -2px rgba(15, 23, 42, 0.04);
  --shadow-glow: 0 12px 30px rgba(2, 132, 199, 0.16);
  --shadow-glow-purple: 0 12px 30px rgba(124, 58, 237, 0.16);
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --container-max: 1280px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: 'Outfit', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  overflow-x: hidden;
  line-height: 1.6;
  background: radial-gradient(circle at 15% 15%, rgba(2, 132, 199, 0.05) 0%, transparent 45%),
              radial-gradient(circle at 85% 30%, rgba(124, 58, 237, 0.05) 0%, transparent 50%),
              radial-gradient(circle at 50% 80%, rgba(5, 150, 105, 0.04) 0%, transparent 45%),
              var(--bg-primary);
  background-attachment: fixed;
  color: var(--text-main);
}

/* Typography Utilities */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-main);
  font-weight: 700;
  line-height: 1.25;
}

p {
  color: var(--text-muted);
}

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

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

.text-gradient-amber {
  background: var(--gradient-secondary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.text-gradient-emerald {
  background: var(--gradient-emerald);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

/* Layout Container */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 6rem 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 4rem auto;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 1rem;
  border-radius: var(--radius-full);
  background: rgba(2, 132, 199, 0.08);
  border: 1px solid rgba(2, 132, 199, 0.25);
  color: var(--accent-cyan);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
  color: var(--text-main);
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition-smooth);
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #ffffff;
  font-weight: 700;
  box-shadow: 0 4px 16px rgba(2, 132, 199, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 26px rgba(2, 132, 199, 0.45);
  color: #ffffff;
}

.btn-secondary {
  background: #ffffff;
  color: var(--text-main);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: #f8fafc;
  border-color: #cbd5e1;
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  color: var(--accent-cyan);
}

.btn-sm {
  padding: 0.5rem 1.15rem;
  font-size: 0.875rem;
}

/* Header & Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  box-shadow: 0 1px 4px rgba(15, 23, 42, 0.04);
  transition: all var(--transition-fast);
}

.navbar .nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

.brand-logo .logo-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.3);
}

.brand-logo .logo-icon svg {
  width: 22px;
  height: 22px;
  fill: #ffffff;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.35rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
  position: relative;
  padding: 0.5rem 0;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent-cyan);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-fast);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  cursor: pointer;
  padding: 0.5rem;
}

/* Hero Section */
.hero {
  padding-top: 150px;
  padding-bottom: 6rem;
  min-height: 90vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero-content {
  text-align: center;
  max-width: 960px;
  margin: 0 auto;
  position: relative;
  z-index: 10;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.45rem 1.25rem;
  border-radius: var(--radius-full);
  background: rgba(2, 132, 199, 0.08);
  border: 1px solid rgba(2, 132, 199, 0.25);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent-cyan);
  margin-bottom: 2rem;
  box-shadow: 0 2px 10px rgba(2, 132, 199, 0.1);
}

.hero-pill .pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 8px var(--accent-cyan);
  animation: pulse-glow 2s infinite;
}

@keyframes pulse-glow {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.4); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.hero-title {
  font-size: clamp(2.5rem, 5.5vw, 4.25rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 1.5rem;
  color: var(--text-main);
}

.hero-desc {
  font-size: clamp(1.1rem, 2vw, 1.25rem);
  color: var(--text-muted);
  max-width: 800px;
  margin: 0 auto 2.5rem auto;
  line-height: 1.7;
}

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

/* Stats Ribbon */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.75rem 2rem;
  box-shadow: var(--shadow-md);
}

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

.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: -0.75rem;
  top: 15%;
  height: 70%;
  width: 1px;
  background: var(--border-subtle);
}

.stat-number {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* Services Grid (5 Core Services) */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 2rem;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-smooth);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.service-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
}

.service-card:hover::before {
  opacity: 1;
}

.service-icon-box {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: rgba(2, 132, 199, 0.08);
  border: 1px solid rgba(2, 132, 199, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  color: var(--accent-cyan);
}

.service-icon-box svg {
  width: 28px;
  height: 28px;
}

.service-card h3 {
  font-size: 1.45rem;
  margin-bottom: 0.85rem;
  color: var(--text-main);
}

.service-card p {
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex-grow: 1;
  color: var(--text-muted);
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  flex-wrap: balance;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.tag-badge {
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  background: #f1f5f9;
  border: 1px solid var(--border-subtle);
  font-size: 0.775rem;
  color: var(--text-muted);
  font-weight: 500;
}

.service-features {
  list-style: none;
  margin-bottom: 1.75rem;
  border-top: 1px solid var(--border-subtle);
  padding-top: 1.25rem;
}

.service-features li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.9rem;
  color: var(--text-main);
  margin-bottom: 0.6rem;
}

.service-features li svg {
  width: 16px;
  height: 16px;
  color: var(--accent-emerald);
  flex-shrink: 0;
  margin-top: 3px;
}

/* Video Showcase Section */
.filter-tabs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  flex-wrap: balance;
  margin-bottom: 3rem;
}

.filter-btn {
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-full);
  background: #ffffff;
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  color: var(--text-main);
  border-color: #cbd5e1;
}

.filter-btn.active {
  background: var(--gradient-primary);
  color: #ffffff;
  border-color: transparent;
  font-weight: 700;
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.35);
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 2rem;
}

.video-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-smooth);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.video-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
}

.video-thumb-container {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #0f172a;
  overflow: hidden;
  cursor: pointer;
}

.video-thumb-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.video-card:hover .video-thumb-img {
  transform: scale(1.06);
}

.video-play-overlay {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast);
}

.video-card:hover .video-play-overlay {
  background: rgba(15, 23, 42, 0.15);
}

.play-button-icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.25);
  transition: transform var(--transition-fast), background var(--transition-fast);
}

.play-button-icon svg {
  width: 24px;
  height: 24px;
  margin-left: 3px;
}

.video-card:hover .play-button-icon {
  transform: scale(1.12);
  background: #ffffff;
  color: var(--accent-blue);
}

.video-card-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.video-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-cyan);
  margin-bottom: 0.5rem;
  letter-spacing: 0.05em;
}

.video-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
  line-height: 1.4;
  color: var(--text-main);
}

.video-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.video-specs {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-subtle);
  padding-top: 1rem;
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* Native Modal Dialogs (Video Player & Photo Lightbox) */
dialog:modal {
  overscroll-behavior: contain;
}

dialog::backdrop {
  overflow: hidden;
  overscroll-behavior: contain;
  background-color: rgba(15, 23, 42, 0.78);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.video-modal,
.photo-lightbox-modal {
  margin: auto;
  padding: 0;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  background: #ffffff;
  color: var(--text-main);
  box-shadow: 0 25px 60px rgba(15, 23, 42, 0.3);
  max-height: calc(100dvh - 2rem);
  overflow: hidden;
}

.video-modal {
  width: min(960px, calc(100vw - 2rem));
}

.photo-lightbox-modal {
  width: min(820px, calc(100vw - 2rem));
}

.video-modal[open],
.photo-lightbox-modal[open] {
  display: flex;
  flex-direction: column;
}

.video-modal-content {
  width: 100%;
  background: #ffffff;
  display: flex;
  flex-direction: column;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
  background: #ffffff;
}

.modal-title {
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text-main);
}

.modal-close-btn {
  background: #f8fafc;
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
}

.modal-close-btn:hover {
  color: var(--text-main);
  background: #f1f5f9;
  border-color: #cbd5e1;
}

.modal-close-btn:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
}

.modal-video-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000000;
}

.modal-video-player {
  width: 100%;
  height: 100%;
  display: block;
  outline: none;
}

/* Warehouse UHF RFID Location-Agnostic Showcase Section */
.rfid-section-surface {
  background: linear-gradient(180deg, rgba(2, 132, 199, 0.03) 0%, rgba(124, 58, 237, 0.03) 50%, transparent 100%);
  border-top: 1px solid rgba(226, 232, 240, 0.8);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
}

.rfid-hero-showcase {
  display: grid;
  grid-template-columns: 1.12fr 1fr;
  gap: 2.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
  margin-bottom: 3rem;
  align-items: center;
}

.rfid-kicker-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1rem;
}

.rfid-pill-highlight {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  background: rgba(5, 150, 105, 0.1);
  border: 1px solid rgba(5, 150, 105, 0.3);
  color: var(--accent-emerald);
}

.rfid-pill-code {
  font-family: monospace;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  background: rgba(124, 58, 237, 0.08);
  border: 1px solid rgba(124, 58, 237, 0.24);
  color: var(--accent-purple);
}

.rfid-hero-title {
  font-size: clamp(1.55rem, 2.5vw, 2rem);
  margin-bottom: 0.85rem;
  color: var(--text-main);
}

.rfid-hero-lead {
  font-size: 0.98rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 1.5rem;
}

.rfid-highlight-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-bottom: 1.75rem;
}

.rfid-highlight-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  background: #f8fafc;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.rfid-highlight-item:hover {
  background: #ffffff;
  border-color: var(--border-glow);
}

.rfid-highlight-icon {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  background: rgba(2, 132, 199, 0.1);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.rfid-highlight-icon svg {
  width: 18px;
  height: 18px;
}

.rfid-highlight-text {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.rfid-highlight-text strong {
  color: var(--text-main);
  display: block;
  margin-bottom: 0.15rem;
  font-size: 0.93rem;
}

.rfid-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.rfid-media-panel {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.rfid-video-stage {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #0f172a;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  padding: 0;
  display: block;
  text-align: left;
}

.rfid-video-stage img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}

.rfid-video-stage:hover img {
  transform: scale(1.05);
}

.rfid-video-badge-top {
  position: absolute;
  top: 0.85rem;
  left: 0.85rem;
  z-index: 2;
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-full);
  background: rgba(15, 23, 42, 0.82);
  backdrop-filter: blur(6px);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.rfid-video-badge-bottom {
  position: absolute;
  bottom: 0.85rem;
  left: 0.85rem;
  right: 0.85rem;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.55rem 0.85rem;
  border-radius: var(--radius-sm);
  background: rgba(15, 23, 42, 0.84);
  backdrop-filter: blur(8px);
  color: #f8fafc;
  font-size: 0.8rem;
  font-weight: 600;
}

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

.rfid-spec-chip {
  background: #f8fafc;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.7rem 0.85rem;
}

.rfid-spec-chip-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-dim);
  font-weight: 700;
  margin-bottom: 0.15rem;
}

.rfid-spec-chip-val {
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--text-main);
}

/* 6-Photo Gallery Grid */
.rfid-gallery-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.rfid-gallery-title-group h3 {
  font-size: 1.35rem;
  margin-bottom: 0.25rem;
}

.rfid-gallery-title-group p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.rfid-photo-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.rfid-photo-filter-btn {
  padding: 0.48rem 1rem;
  border-radius: var(--radius-full);
  background: #ffffff;
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  touch-action: manipulation;
}

.rfid-photo-filter-btn:hover {
  color: var(--text-main);
  border-color: #cbd5e1;
}

.rfid-photo-filter-btn.active {
  background: var(--gradient-primary);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.28);
}

.rfid-photo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.rfid-photo-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-smooth);
  display: flex;
  flex-direction: column;
}

.rfid-photo-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
}

.rfid-photo-trigger {
  position: relative;
  width: 100%;
  height: 360px;
  background: radial-gradient(circle at 50% 35%, #1e293b 0%, #0f172a 100%);
  border: none;
  padding: 0.75rem;
  cursor: zoom-in;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  touch-action: manipulation;
}

.rfid-photo-trigger img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: 100%;
  object-fit: contain;
  border-radius: var(--radius-sm);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
  transition: transform 0.4s ease;
}

.rfid-photo-card:hover .rfid-photo-trigger img {
  transform: scale(1.04);
}

.rfid-zoom-pill {
  position: absolute;
  bottom: 0.75rem;
  right: 0.75rem;
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.92);
  color: var(--text-main);
  font-size: 0.74rem;
  font-weight: 700;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.25);
  opacity: 0.9;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.rfid-photo-card:hover .rfid-zoom-pill {
  opacity: 1;
  transform: translateY(-2px);
  color: var(--accent-cyan);
}

.rfid-photo-body {
  padding: 1.25rem 1.4rem 1.4rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.rfid-photo-tag {
  font-size: 0.73rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-cyan);
  margin-bottom: 0.4rem;
}

.rfid-photo-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.45rem;
  line-height: 1.35;
}

.rfid-photo-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* Photo Lightbox Modal Content */
.lightbox-stage {
  position: relative;
  background: #0f172a;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 360px;
  max-height: 70dvh;
  padding: 1rem 3.5rem;
}

.lightbox-img {
  max-width: 100%;
  max-height: 66dvh;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: var(--radius-sm);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.5);
}

.lightbox-nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
  transition: all var(--transition-fast);
  touch-action: manipulation;
}

.lightbox-nav-btn:hover {
  background: #ffffff;
  color: var(--accent-cyan);
  transform: translateY(-50%) scale(1.08);
}

.lightbox-nav-btn:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
}

.lightbox-prev {
  left: 0.85rem;
}

.lightbox-next {
  right: 0.85rem;
}

.lightbox-caption-bar {
  padding: 1rem 1.5rem;
  background: #ffffff;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.lightbox-caption-text {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.lightbox-counter {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-cyan);
  background: rgba(2, 132, 199, 0.08);
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

/* Embedded Kits & ESP32-OS Modular Suite Section */
.kits-filter-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  flex-wrap: wrap;
  flex-wrap: balance;
  margin-bottom: 2.5rem;
}

.kit-filter-btn {
  padding: 0.55rem 1.15rem;
  border-radius: var(--radius-full);
  background: #ffffff;
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.kit-filter-btn:hover {
  color: var(--text-main);
  border-color: #cbd5e1;
}

.kit-filter-btn.active {
  background: var(--gradient-primary);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.3);
}

.kits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 2rem;
  margin-bottom: 3.5rem;
}

.kit-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-smooth);
  display: flex;
  flex-direction: column;
  position: relative;
}

.kit-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
}

.kit-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.kit-icon-badge {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: rgba(2, 132, 199, 0.08);
  border: 1px solid rgba(2, 132, 199, 0.22);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.kit-icon-badge svg {
  width: 26px;
  height: 26px;
  display: block;
}

.kit-module-code {
  font-family: monospace;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent-purple);
  background: rgba(124, 58, 237, 0.08);
  border: 1px solid rgba(124, 58, 237, 0.22);
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-full);
}

.kit-card h3 {
  font-size: 1.3rem;
  margin-bottom: 0.65rem;
  color: var(--text-main);
}

.kit-card p {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  line-height: 1.6;
}

.kit-hw-badges {
  display: flex;
  flex-wrap: wrap;
  flex-wrap: balance;
  gap: 0.45rem;
  margin-bottom: 1.25rem;
}

.kit-hw-badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  background: #f1f5f9;
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
}

.kit-specs-list {
  list-style: none;
  border-top: 1px solid var(--border-subtle);
  padding-top: 1.15rem;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.kit-specs-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.55rem;
  font-size: 0.875rem;
  color: var(--text-main);
  margin-bottom: 0.55rem;
}

.kit-specs-list li svg {
  width: 16px;
  height: 16px;
  color: var(--accent-emerald);
  flex-shrink: 0;
  margin-top: 3px;
  display: block;
}

.kit-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  border-top: 1px solid var(--border-subtle);
  padding-top: 1rem;
  margin-top: auto;
}

.kit-standalone-tag {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent-emerald);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.kit-action-link {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-cyan);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.kit-action-link:hover {
  color: var(--accent-blue);
}

.kit-wiring-showcase {
  display: grid;
  grid-template-columns: 1.05fr 1.25fr;
  gap: 2.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
  align-items: center;
}

.kit-wiring-figure {
  background: #f8fafc;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem;
  text-align: center;
}

.kit-wiring-img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  margin-bottom: 0.75rem;
}

.kit-wiring-caption {
  font-size: 0.82rem;
  color: var(--text-dim);
  font-weight: 500;
}

.pinout-table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}

.pinout-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.86rem;
  text-align: left;
}

.pinout-table th {
  background: #f1f5f9;
  color: var(--text-main);
  font-weight: 700;
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
}

.pinout-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-muted);
}

.pinout-table tr:last-child td {
  border-bottom: none;
}

.pinout-table code {
  font-family: monospace;
  font-weight: 700;
  color: var(--accent-cyan);
  background: rgba(2, 132, 199, 0.08);
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
}

/* Architecture Blueprint Section */
.architecture-container {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 3rem;
  box-shadow: var(--shadow-md);
}

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

.layer-card {
  background: #f8fafc;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  text-align: center;
  transition: all var(--transition-fast);
}

.layer-card:hover {
  border-color: var(--border-glow);
  background: #ffffff;
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.layer-number {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(2, 132, 199, 0.1);
  border: 1px solid rgba(2, 132, 199, 0.3);
  color: var(--accent-cyan);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem auto;
}

.layer-title {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
  color: var(--text-main);
}

.layer-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 1rem;
}

.layer-stack {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.layer-stack-item {
  font-size: 0.75rem;
  padding: 0.3rem 0.6rem;
  border-radius: var(--radius-sm);
  background: #ffffff;
  border: 1px solid var(--border-subtle);
  color: var(--accent-cyan);
  font-family: monospace;
  font-weight: 600;
}

/* Interactive Project Estimator */
.estimator-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 3rem;
  box-shadow: var(--shadow-lg);
  max-width: 900px;
  margin: 0 auto;
}

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

.form-group-estimator {
  margin-bottom: 1.75rem;
}

.estimator-label {
  display: block;
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text-main);
}

.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.custom-checkbox {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: #f8fafc;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.custom-checkbox:hover {
  background: #ffffff;
  border-color: #cbd5e1;
  box-shadow: var(--shadow-sm);
}

.custom-checkbox:has(input:checked) {
  background: #ffffff;
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 2px rgba(2, 132, 199, 0.14);
}

.custom-checkbox input[type="checkbox"] {
  accent-color: var(--accent-cyan);
  width: 18px;
  height: 18px;
}

.custom-checkbox span {
  font-size: 0.9rem;
  color: var(--text-main);
  font-weight: 500;
}

.summary-box {
  background: #f8fafc;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.summary-title {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: var(--text-main);
}

.summary-price-est {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--accent-cyan);
  margin-bottom: 0.25rem;
}

.summary-timeline {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

/* FAQ Accordion (GEO Authoritative Answers) */
.faq-container {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.faq-item.active {
  border-color: var(--accent-cyan);
  box-shadow: 0 4px 16px rgba(2, 132, 199, 0.12);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
}

.faq-chevron {
  transition: transform var(--transition-fast);
  color: var(--accent-cyan);
}

.faq-item.active .faq-chevron {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
  padding: 0 1.5rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.faq-item.active .faq-answer {
  padding-bottom: 1.5rem;
}

/* Contact / Consultation Form */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 3rem;
  box-shadow: var(--shadow-lg);
}

.contact-info h3 {
  font-size: 1.85rem;
  margin-bottom: 1rem;
  color: var(--text-main);
}

.contact-info p {
  margin-bottom: 2rem;
  font-size: 1rem;
  color: var(--text-muted);
}

.contact-meta-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.contact-meta-item {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.contact-meta-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(2, 132, 199, 0.08);
  border: 1px solid rgba(2, 132, 199, 0.2);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-input, .form-textarea, .form-select {
  width: 100%;
  padding: 0.9rem 1.25rem;
  border-radius: var(--radius-md);
  background: #f8fafc;
  border: 1px solid #cbd5e1;
  color: var(--text-main);
  font-size: 0.95rem;
  font-family: inherit;
  outline: none;
  transition: all var(--transition-fast);
}

.form-input:focus, .form-textarea:focus, .form-select:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
  background: #ffffff;
}

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

/* Footer */
.footer {
  border-top: 1px solid var(--border-subtle);
  background: #ffffff;
  padding: 4rem 0 2rem 0;
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-about p {
  margin-top: 1rem;
  max-width: 320px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  color: var(--text-main);
}

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

.footer-col a {
  color: var(--text-muted);
}

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

.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding-top: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text-dim);
  font-size: 0.85rem;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Toast Notification */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 3000;
  background: #ffffff;
  border: 1px solid var(--accent-emerald);
  box-shadow: 0 10px 30px rgba(5, 150, 105, 0.15);
  border-radius: var(--radius-md);
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-main);
  transform: translateY(100px);
  opacity: 0;
  transition: all var(--transition-smooth);
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .layers-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
  }
  .stat-item:nth-child(2)::after {
    display: none;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .kit-wiring-showcase {
    grid-template-columns: 1fr;
  }
  .rfid-hero-showcase {
    grid-template-columns: 1fr;
    padding: 1.75rem;
  }
  .rfid-photo-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }
  .nav-links {
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid var(--border-subtle);
    box-shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
    flex-direction: column;
    padding: 2rem;
    gap: 1.5rem;
    transform: translateY(-150%);
    transition: transform var(--transition-smooth);
  }
  .nav-links.open {
    transform: translateY(0);
  }
  .nav-actions .btn {
    display: none;
  }
  .stats-bar {
    grid-template-columns: 1fr;
  }
  .stat-item::after {
    display: none !important;
  }
  .services-grid {
    grid-template-columns: 1fr;
  }
  .kits-grid {
    grid-template-columns: 1fr;
  }
  .video-grid {
    grid-template-columns: 1fr;
  }
  .rfid-photo-grid {
    grid-template-columns: 1fr;
  }
  .rfid-stack-spec-grid {
    grid-template-columns: 1fr;
  }
  .lightbox-stage {
    padding: 0.75rem 2.75rem;
  }
  .lightbox-caption-bar {
    flex-direction: column;
    align-items: flex-start;
  }
  .estimator-grid {
    grid-template-columns: 1fr;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .layers-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}