/* ===========================
   Reset & Variables
   =========================== */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #2856d6;
  --primary-dark: #1d3fa8;
  --secondary: #755cd0;
  --primary-gradient: linear-gradient(135deg, #2856d6 0%, #755cd0 100%);
  --dark: #0a0a0a;
  --gray-900: #1a1a1a;
  --gray-800: #2d2d2d;
  --gray-700: #404040;
  --gray-600: #666666;
  --gray-500: #808080;
  --gray-400: #9a9a9a;
  --gray-300: #cccccc;
  --gray-200: #e5e5e5;
  --gray-100: #f5f5f5;
  --white: #ffffff;
  --gradient: linear-gradient(135deg, #ffffff 0%, #fafafa 100%);
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI',
    sans-serif;
  line-height: 1.6;
  color: var(--gray-900);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  min-width: 320px;
}

/* ===========================
   Typography
   =========================== */

h1,
h2,
h3,
h4 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: 4rem;
}

h2 {
  font-size: 3rem;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

p {
  line-height: 1.75;
  color: var(--gray-600);
}

strong {
  font-weight: 600;
  color: var(--gray-900);
}

a {
  text-decoration: none;
}

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

/* ===========================
   Containers
   =========================== */

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 2rem;
}

.container-wide {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
}

.container-narrow {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 2rem;
}

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

/* Section divider line */
.section::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  border-radius: 2px;
}

.section-alt {
  background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
  position: relative;
  overflow: hidden;
  border-top: 1px solid rgba(40, 86, 214, 0.1);
  border-bottom: 1px solid rgba(40, 86, 214, 0.1);
}

.section-alt::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--primary));
  opacity: 0.6;
}

.section-alt::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--secondary), transparent);
  border-radius: 2px;
}

.section-dark {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
  color: var(--white);
  border-top: 3px solid var(--primary);
  border-bottom: 3px solid var(--secondary);
  position: relative;
}

.section-dark::after {
  display: none;
}

.section-dark h2,
.section-dark h3 {
  color: var(--white);
}

.section-dark p {
  color: var(--gray-400);
}

.section-light {
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  color: var(--gray-900);
  border-top: 2px solid rgba(40, 86, 214, 0.15);
}

.section-light h2,
.section-light h3 {
  color: var(--gray-900);
}

.section-light p {
  color: var(--gray-600);
}

.section-light .contact-item h3 {
  color: var(--gray-900);
}

.section-light .contact-icon {
  opacity: 0.8;
}

.section-cta {
  background: var(--gradient);
  padding: 10rem 0;
  text-align: center;
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.section-title {
  font-size: 2.75rem;
  margin-bottom: 1.25rem;
  background: linear-gradient(135deg, #1d4ed8 0%, #6366f1 50%, #a855f7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
  display: inline-block;
  padding-bottom: 0.75rem;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 2px;
}

.section-subtitle {
  font-size: 1.2rem;
  color: var(--gray-600);
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ===========================
   Navigation
   =========================== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--gray-200);
  z-index: 1000;
  transition: all 0.3s ease;
}

.navbar .container-wide {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 1.25rem;
  padding-bottom: 1.25rem;
}

.logo {
  display: flex;
  align-items: center;
}

.logo-img {
  height: 40px;
  width: auto;
  display: block;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  list-style: none;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--gray-700);
  transition: color 0.2s ease;
}

.nav-link:hover {
  color: var(--gray-900);
}

.btn-nav {
  padding: 0.625rem 1.5rem;
  background: var(--primary-gradient);
  color: var(--white);
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: all 0.2s ease;
}

.btn-nav:hover {
  background: linear-gradient(135deg, #1d3fa8 0%, #5a47a8 100%);
  transform: translateY(-1px);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
  justify-content: center;
  align-items: center;
  position: relative;
}

.hamburger span {
  width: 24px;
  height: 2px;
  background: var(--gray-800);
  border-radius: 1px;
  transition: all 0.3s ease;
  display: block;
  position: relative;
  transform-origin: center;
}

/* ===========================
   Buttons
   =========================== */

.btn {
  display: inline-block;
  padding: 1rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 8px;
  transition: all 0.2s ease;
  cursor: pointer;
  border: none;
  text-align: center;
}

.btn-primary {
  background: var(--primary-gradient);
  color: var(--white);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #1d3fa8 0%, #5a47a8 100%);
  box-shadow: 0 4px 12px rgba(40, 86, 214, 0.35);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--gray-700);
  border: 1.5px solid var(--gray-300);
}

.btn-outline:hover {
  border-color: var(--gray-900);
  color: var(--gray-900);
}

.btn-lg {
  padding: 1.125rem 2.5rem;
  font-size: 1.0625rem;
}

.btn-xl {
  padding: 1.25rem 3rem;
  font-size: 1.125rem;
}

/* ===========================
   Hero Section
   =========================== */

.hero {
  padding: 4rem 0 5rem;
  background: var(--gradient);
  margin-top: 73px;
  position: relative;
  overflow: hidden;
}

.hero::before,
.hero::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

.hero::before {
  width: 600px;
  height: 600px;
  background: radial-gradient(
    circle,
    rgba(40, 86, 214, 0.18) 0%,
    rgba(117, 92, 208, 0.1) 50%,
    transparent 70%
  );
  top: -200px;
  left: -100px;
}

.hero::after {
  width: 500px;
  height: 500px;
  background: radial-gradient(
    circle,
    rgba(117, 92, 208, 0.15) 0%,
    rgba(40, 86, 214, 0.08) 50%,
    transparent 70%
  );
  bottom: -150px;
  right: -50px;
}

.hero-content {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-block;
  padding: 0.5rem 1.25rem;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-700);
  margin-bottom: 3.5rem;
}

.hero-logo {
  max-width: 600px;
  height: auto;
  margin: 0 auto 2rem;
  display: block;
}

.hero-title {
  font-size: 3rem;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  color: var(--gray-900);
  letter-spacing: -0.03em;
}

.hero-subtitle {
  font-size: 1.375rem;
  line-height: 1.6;
  color: var(--gray-600);
  margin-bottom: 3rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--gray-200);
  flex-wrap: nowrap;
}

.stat {
  text-align: center;
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--gray-600);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 500;
}

/* ===========================
   Social Proof
   =========================== */

.social-proof {
  padding: 2.5rem 0;
  background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
  border-top: 1px solid rgba(40, 86, 214, 0.1);
  border-bottom: 1px solid rgba(40, 86, 214, 0.1);
}

.social-proof-text {
  text-align: center;
  font-size: 0.875rem;
  color: var(--gray-500);
  margin-bottom: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 500;
}

.logo-carousel {
  overflow: hidden;
  width: 100%;
  position: relative;
}

.logo-track {
  display: flex;
  gap: 4rem;
  animation: scroll 30s linear infinite;
  width: fit-content;
}

.partner-logo {
  height: 100px;
  width: auto;
  object-fit: contain;
  filter: grayscale(100%);
  transition: all 0.3s ease;
}

.partner-logo:hover {
  filter: grayscale(0%);
}

@keyframes scroll {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-50%);
  }
}

.logo-carousel:hover .logo-track {
  animation-play-state: paused;
}

/* ===========================
   Problem Section
   =========================== */

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.problem-card {
  padding: 2rem;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.problem-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

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

.problem-card:hover {
  border-color: var(--primary);
  box-shadow: 0 12px 32px rgba(40, 86, 214, 0.15);
  transform: translateY(-4px);
}

.problem-icon {
  color: var(--primary);
  margin-bottom: 1.5rem;
}

.problem-card h3 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: var(--gray-900);
}

.problem-card p {
  color: var(--gray-600);
  line-height: 1.7;
}

.callout {
  text-align: center;
  padding: 2rem;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 16px;
  margin-top: 1rem;
  box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
  border: 3px solid rgba(255, 255, 255, 0.2);
}

.callout p {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1.6;
  letter-spacing: 0.02em;
}

.callout strong {
  color: #ffd700;
  text-shadow: 0 0 20px rgba(255, 215, 0, 0.6), 0 0 10px rgba(255, 215, 0, 0.4);
  font-weight: 800;
}

/* ===========================
   Solution Section
   =========================== */

.solution-feature {
  max-width: 800px;
  margin: 0 auto;
}

/* AI Detection vs Plagiarism Comparison */
.comparison-section {
  margin-top: 3rem;
  padding: 2.5rem 0;
  background: linear-gradient(180deg, #f8f9fb 0%, #ffffff 100%);
  border-radius: 24px;
}

.comparison-header {
  text-align: center;
  margin-bottom: 3rem;
}

.comparison-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.comparison-subtitle {
  font-size: 1.125rem;
  color: var(--gray-600);
  max-width: 600px;
  margin: 0 auto;
}

.comparison-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  max-width: 1000px;
  margin: 0 auto;
}

.comparison-card {
  background: white;
  border-radius: 16px;
  padding: 0;
  position: relative;
  transition: all 0.3s ease;
  overflow: hidden;
  border: 1px solid var(--gray-200);
}

.comparison-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
  border-color: var(--gray-300);
}

.comparison-card > h3.card-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gray-900);
  margin: 0 2rem 1rem 2rem;
}

.subtitle-section {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--gray-800);
  margin: 2rem 2rem 0.75rem 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--gray-200);
}

.subtitle-brand {
  color: var(--primary);
  font-weight: 500;
}

.card-description {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--gray-600);
  margin: 0 2rem 1.5rem 2rem;
}

.comparison-list {
  list-style: none;
  padding: 0 2rem 2rem 2rem;
  margin: 0;
}

.comparison-list li {
  position: relative;
  padding-left: 2rem;
  margin-bottom: 1rem;
  line-height: 1.6;
  color: var(--gray-600);
  font-size: 0.925rem;
}

.comparison-list li:before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 0;
  font-weight: 700;
  font-size: 1.1rem;
  color: #4ade80;
}

.comparison-list li:last-child {
  margin-bottom: 0;
}

/* Detection Visual Elements at Top */
.detection-visual-top {
  margin-bottom: 2rem;
}

.visual-card {
  padding: 2rem;
  min-height: 280px;
  position: relative;
}

.visual-card.ai-card {
  background: linear-gradient(
    135deg,
    #a8e6cf 0%,
    #dcedc1 25%,
    #ffd3b6 50%,
    #ffaaa5 75%,
    #ff8b94 100%
  );
  padding: 2.5rem;
}

.visual-card.plagiarism-card {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 0;
}

.visual-card .sample-text {
  background: white;
  padding: 1.25rem;
  border-radius: 8px;
  margin-bottom: 1.25rem;
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--gray-700);
}

.visual-card.ai-card .sample-text {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.report-header {
  background: #1e293b;
  color: white;
  font-size: 1.125rem;
  font-weight: 600;
  text-align: center;
  padding: 1rem;
  margin: 0;
}

.report-content {
  background: white;
  padding: 1.5rem;
}

.plagiarism-text {
  margin-bottom: 1.25rem !important;
  padding: 0 !important;
  background: none !important;
  box-shadow: none !important;
}

/* AI Content Index Styles */
.ai-index {
  background: white;
  padding: 1.25rem;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.ai-index h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--gray-800);
  text-align: center;
  margin-bottom: 1rem;
}

.index-bar {
  position: relative;
  height: 40px;
  border-radius: 20px;
  overflow: hidden;
  margin-bottom: 0.75rem;
}

.index-gradient {
  width: 100%;
  height: 100%;
  background: linear-gradient(
    to right,
    #4ade80 0%,
    #86efac 15%,
    #bef264 30%,
    #facc15 45%,
    #fb923c 60%,
    #f87171 80%,
    #ef4444 100%
  );
}

.index-marker {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 0;
  height: 0;
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-top: 12px solid #1e293b;
}

.index-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.875rem;
  color: var(--gray-600);
}

/* Plagiarism Report Styles */
.highlight-blue {
  background: rgba(59, 130, 246, 0.2);
  color: #1e40af;
}

.highlight-cyan {
  background: rgba(6, 182, 212, 0.2);
  color: #0e7490;
}

.highlight-purple {
  background: rgba(147, 51, 234, 0.2);
  color: #6b21a8;
}

.highlight-orange {
  background: rgba(251, 146, 60, 0.2);
  color: #c2410c;
}

.source-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1rem;
  background: #f9fafb;
  border-radius: 12px;
  border: 1px solid #e5e7eb;
}

.source-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.35rem 0;
}

.source-dot {
  width: 12px;
  height: 12px;
  border-radius: 2px;
  flex-shrink: 0;
}

.source-dot.blue {
  background: #3b82f6;
}

.source-dot.cyan {
  background: #06b6d4;
}

.source-dot.purple {
  background: #9333ea;
}

.source-dot.orange {
  background: #fb923c;
}

.source-name {
  flex: 1;
  font-size: 0.875rem;
  color: var(--gray-700);
}

.source-percent {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--gray-600);
}

/* Ensure equal card heights */
.comparison-grid .comparison-card {
  display: flex;
  flex-direction: column;
}

.detection-visual-top {
  flex-shrink: 0;
}

/* Responsive Design for Comparison */
@media (max-width: 768px) {
  .comparison-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .comparison-title {
    font-size: 1.75rem;
  }

  .visual-card {
    min-height: 240px;
  }

  .comparison-card > h3.card-title {
    font-size: 1.25rem;
    margin: 0 1.5rem 1rem 1.5rem;
  }

  .card-description {
    margin: 0 1.5rem 1.5rem 1.5rem;
  }

  .comparison-list {
    padding: 0 1.5rem 1.5rem 1.5rem;
  }

  .subtitle-section {
    margin: 2rem 1.5rem 0.75rem 1.5rem;
  }
}

.feature-content h3 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: var(--gray-900);
  text-align: center;
}

.feature-content p {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--gray-600);
  margin-bottom: 1.5rem;
}

.feature-result {
  font-size: 1.25rem;
  color: var(--gray-900);
}

.feature-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 2rem;
  text-align: left;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.feature-list li {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--gray-700);
  margin-bottom: 1rem;
  padding-left: 1.5rem;
  position: relative;
}

.feature-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: bold;
  font-size: 1.25rem;
}

.feature-list li strong {
  color: var(--gray-900);
}

.video-preview {
  position: relative;
  max-width: 800px;
  margin: 0 auto 2.5rem;
  border-radius: 16px;
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.3s ease;
}

.video-preview:hover {
  transform: scale(1.02);
}

.video-thumbnail {
  width: 100%;
  height: auto;
  display: block;
}

.play-button {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: none;
  border: none;
  cursor: pointer;
  transition: transform 0.3s ease;
  padding: 0;
}

.play-button:hover {
  transform: translate(-50%, -50%) scale(1.1);
}

.play-button svg {
  filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.3));
}

/* ===========================
   Technology Section
   =========================== */

.tech-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.tech-card {
  padding: 2rem;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  transition: all 0.3s ease;
  position: relative;
}

.tech-card:hover {
  border-color: var(--secondary);
  box-shadow: 0 12px 32px rgba(139, 92, 246, 0.12);
  transform: translateY(-4px);
}

.tech-icon {
  color: var(--primary);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, rgba(40, 86, 214, 0.1), rgba(139, 92, 246, 0.1));
  border-radius: 12px;
  margin-left: auto;
  margin-right: auto;
}

.tech-card h3 {
  font-size: 1.375rem;
  margin-bottom: 1rem;
  color: var(--gray-900);
}

.tech-card p {
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

.tech-list {
  list-style: none;
  margin-top: 1.5rem;
}

.tech-list li {
  padding: 0.5rem 0;
  padding-left: 1.5rem;
  position: relative;
  color: var(--gray-600);
  font-size: 0.9375rem;
}

.tech-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 600;
}

.comparison {
  display: flex;
  gap: 1.5rem;
  margin: 1.5rem 0;
}

.comparison-vertical {
  flex-direction: column;
  gap: 1rem;
}

.comparison-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.comparison-vertical .comparison-item {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  gap: 0.75rem 1rem;
  align-items: center;
  padding: 1.25rem;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  transition: all 0.3s ease;
}

.comparison-vertical .comparison-item:hover {
  border-color: var(--primary);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  transform: translateX(4px);
}

.comparison-icon {
  grid-row: 1 / 3;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: linear-gradient(
    135deg,
    rgba(40, 86, 214, 0.1) 0%,
    rgba(117, 92, 208, 0.1) 100%
  );
  color: var(--primary);
}

.comparison-vertical .label {
  grid-column: 2;
  justify-self: start;
}

.comparison-vertical .desc {
  grid-column: 2;
  justify-self: start;
}

.label {
  display: inline-block;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 600;
}

.label.human {
  background: linear-gradient(
    135deg,
    rgba(40, 86, 214, 0.1) 0%,
    rgba(117, 92, 208, 0.1) 100%
  );
  color: var(--primary);
}

.label.ai {
  background: var(--gray-900);
  color: var(--white);
}

.desc {
  font-size: 0.9375rem;
  color: var(--gray-600);
}

.tech-callout {
  padding: 2rem;
  background: var(--gray-100);
  border-radius: 12px;
  text-align: center;
}

.tech-callout p {
  font-size: 1.0625rem;
  color: var(--gray-700);
  margin: 0;
}

.tech-callout-dark {
  position: relative;
  padding: 2.5rem 2rem;
  margin: 0 -2rem;
  width: calc(100% + 4rem);
  background: linear-gradient(135deg, #0a0e1a 0%, #1a1f3a 50%, #0f1429 100%);
  border-top: 1px solid rgba(40, 86, 214, 0.3);
  border-bottom: 1px solid rgba(40, 86, 214, 0.3);
  overflow: hidden;
  box-shadow: inset 0 1px 0 rgba(40, 86, 214, 0.2),
    inset 0 -1px 0 rgba(40, 86, 214, 0.2), 0 8px 32px rgba(0, 0, 0, 0.4);
}

.tech-callout-dark::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(40, 86, 214, 0.15),
    transparent
  );
  animation: shimmer 4s infinite;
  z-index: 1;
}

.tech-callout-dark p {
  position: relative;
  z-index: 3;
  font-size: 1.125rem;
  color: var(--white);
  line-height: 1.8;
  font-weight: 500;
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.tech-callout-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 500px;
  height: 500px;
  background: radial-gradient(
    circle,
    rgba(40, 86, 214, 0.25) 0%,
    rgba(117, 92, 208, 0.15) 40%,
    transparent 70%
  );
  animation: pulse 6s ease-in-out infinite;
  pointer-events: none;
  z-index: 1;
}

.tech-bg-grid {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: linear-gradient(
      rgba(40, 86, 214, 0.03) 1px,
      transparent 1px
    ),
    linear-gradient(90deg, rgba(40, 86, 214, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  animation: gridMove 20s linear infinite;
  pointer-events: none;
  z-index: 1;
}

.tech-chip {
  position: absolute;
  color: rgba(255, 255, 255, 0.15);
  pointer-events: none;
  z-index: 2;
}

.tech-chip-1 {
  top: 20%;
  left: 10%;
  animation: float 8s ease-in-out infinite;
}

.tech-chip-2 {
  top: 60%;
  right: 12%;
  animation: float 10s ease-in-out infinite 1s;
}

.tech-chip-3 {
  bottom: 25%;
  left: 15%;
  animation: float 7s ease-in-out infinite 2s;
}

.tech-highlight {
  font-size: 1.5rem;
  line-height: 1.8;
  color: var(--gray-700);
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

.tech-highlight strong {
  color: var(--primary);
  font-weight: 600;
}

.ai-model-name {
  font-size: 1.8em;
  font-weight: 900;
}

.shooting-star {
  position: absolute;
  width: 2px;
  height: 2px;
  background: white;
  border-radius: 50%;
  box-shadow: 0 0 4px 2px rgba(255, 255, 255, 0.8);
  opacity: 0;
  pointer-events: none;
  z-index: 2;
}

.shooting-star::after {
  content: '';
  position: absolute;
  top: 0;
  right: 2px;
  width: 60px;
  height: 1px;
  background: linear-gradient(to right, rgba(255, 255, 255, 0.8), transparent);
}

.shooting-star-1 {
  top: 15%;
  left: -60px;
  animation: shootingStar 3s linear infinite;
}

.shooting-star-2 {
  top: 50%;
  left: -60px;
  animation: shootingStar 4s linear infinite 1.5s;
}

.shooting-star-3 {
  top: 75%;
  left: -60px;
  animation: shootingStar 3.5s linear infinite 2.8s;
}

.data-stream {
  position: absolute;
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-family: 'Courier New', monospace;
  font-size: 11px;
  font-weight: bold;
  color: rgba(255, 255, 255, 0.3);
  pointer-events: none;
  z-index: 2;
  opacity: 0;
}

.data-stream span {
  display: block;
  text-shadow: 0 0 8px rgba(255, 255, 255, 0.5);
}

.data-stream-1 {
  top: -50px;
  left: 25%;
  animation: dataFlow 6s linear infinite;
}

.data-stream-2 {
  top: -50px;
  right: 30%;
  animation: dataFlow 7s linear infinite 2s;
}

.data-stream-3 {
  top: -50px;
  left: 60%;
  animation: dataFlow 5.5s linear infinite 3.5s;
}

@keyframes shimmer {
  0% {
    left: -100%;
  }
  100% {
    left: 100%;
  }
}

@keyframes pulse {
  0%,
  100% {
    opacity: 0.6;
    transform: translate(-50%, -50%) scale(1);
  }
  50% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.2);
  }
}

@keyframes gridMove {
  0% {
    transform: translate(0, 0);
  }
  100% {
    transform: translate(50px, 50px);
  }
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0) rotate(0deg);
    opacity: 0.2;
  }
  50% {
    transform: translateY(-20px) rotate(10deg);
    opacity: 0.3;
  }
}

@keyframes shootingStar {
  0% {
    left: -60px;
    opacity: 0;
  }
  10% {
    opacity: 1;
  }
  80% {
    opacity: 1;
  }
  100% {
    left: 110%;
    opacity: 0;
  }
}

@keyframes dataFlow {
  0% {
    top: -50px;
    opacity: 0;
  }
  10% {
    opacity: 0.6;
  }
  80% {
    opacity: 0.4;
  }
  100% {
    top: calc(100% + 50px);
    opacity: 0;
  }
}

/* ===========================
   Language Support
   =========================== */

#language {
  position: relative;
  overflow: hidden;
}

#language::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 500px;
  height: 500px;
  pointer-events: none;
  z-index: 0;
  opacity: 0.06;
  background-image: url('data:image/svg+xml;utf8,<svg width="500" height="500" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg"><circle cx="12" cy="12" r="10" stroke="%232856d6" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/><line x1="2" y1="12" x2="22" y2="12" stroke="%232856d6" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/><path d="M12 2a15.3 15.3 0 0 1 4 10 15.3 15.3 0 0 1-4 10 15.3 15.3 0 0 1-4-10 15.3 15.3 0 0 1 4-10z" stroke="%232856d6" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/></svg>');
  background-size: contain;
  background-position: center;
  background-repeat: no-repeat;
}

#language .container {
  position: relative;
  z-index: 1;
}

.language-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 3rem;
}

.lang-tag {
  padding: 0.625rem 1.25rem;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 50px;
  font-size: 0.9375rem;
  color: var(--gray-700);
  font-weight: 500;
  transition: all 0.2s ease;
}

.lang-tag:hover {
  border-color: var(--primary);
  background: rgba(40, 86, 214, 0.05);
  color: var(--primary);
}

.language-note {
  text-align: center;
  font-size: 1.0625rem;
  color: var(--gray-600);
  line-height: 1.7;
  max-width: 700px;
  margin: 0 auto;
}

/* ===========================
   Transparency
   =========================== */

.transparency-feature {
  margin-top: 2rem;
}

.screenshot-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.screenshot-item {
  position: relative;
  overflow: hidden;
}

.screenshot-item img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 20px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05), 0 10px 20px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.screenshot-item:hover img {
  transform: translateY(-5px);
  box-shadow: 0 8px 12px rgba(0, 0, 0, 0.08), 0 16px 32px rgba(0, 0, 0, 0.12);
}

.screenshot-caption {
  margin-top: 1.5rem;
  text-align: center;
}

.screenshot-caption h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: #2563eb;
  margin-bottom: 0.5rem;
}

.screenshot-caption p {
  font-size: 1rem;
  color: #666;
  line-height: 1.6;
}

@media (max-width: 768px) {
  .screenshot-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    padding: 0 1rem;
  }
}

/* ===========================
   Validation
   =========================== */

.validation-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  max-width: 1100px;
  margin: 0 auto;
}

.validation-item {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  padding: 2.5rem 2rem;
  text-align: center;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.validation-item:hover {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(40, 86, 214, 0.3);
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.validation-badge {
  width: 72px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 600;
  border-radius: 16px;
  margin: 0 auto 1.5rem;
  border: 2px solid;
  position: relative;
  transition: all 0.3s ease;
}

.badge-yellow {
  background: linear-gradient(
    135deg,
    rgba(255, 215, 0, 0.2) 0%,
    rgba(255, 193, 7, 0.2) 100%
  );
  color: #ffd700;
  border-color: rgba(255, 215, 0, 0.4);
  box-shadow: 0 8px 24px rgba(255, 215, 0, 0.2);
}

.badge-red {
  background: linear-gradient(
    135deg,
    rgba(255, 77, 77, 0.2) 0%,
    rgba(255, 107, 107, 0.2) 100%
  );
  color: #ff6b6b;
  border-color: rgba(255, 77, 77, 0.4);
  box-shadow: 0 8px 24px rgba(255, 77, 77, 0.2);
}

.badge-green {
  background: linear-gradient(
    135deg,
    rgba(78, 204, 163, 0.2) 0%,
    rgba(92, 219, 149, 0.2) 100%
  );
  color: #4ecca3;
  border-color: rgba(78, 204, 163, 0.4);
  box-shadow: 0 8px 24px rgba(78, 204, 163, 0.2);
}

.validation-item:hover .badge-yellow {
  transform: scale(1.05);
  border-color: rgba(255, 215, 0, 0.6);
  box-shadow: 0 12px 32px rgba(255, 215, 0, 0.35);
}

.validation-item:hover .badge-red {
  transform: scale(1.05);
  border-color: rgba(255, 77, 77, 0.6);
  box-shadow: 0 12px 32px rgba(255, 77, 77, 0.35);
}

.validation-item:hover .badge-green {
  transform: scale(1.05);
  border-color: rgba(78, 204, 163, 0.6);
  box-shadow: 0 12px 32px rgba(78, 204, 163, 0.35);
}

.validation-item h3 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: var(--white);
  font-weight: 600;
}

.validation-item p {
  color: var(--gray-400);
  line-height: 1.7;
  font-size: 0.95rem;
}

/* ===========================
   Use Cases - Tabbed Interface
   =========================== */

.use-cases-tabs {
  max-width: 1000px;
  margin: 0 auto;
}

/* Tab Headers */
.tabs-header {
  display: flex;
  justify-content: center;
  gap: 0;
  margin-bottom: 3rem;
  background: #f8f9fa;
  border-radius: 12px;
  padding: 4px;
}

.tab-button {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 1.5rem 2rem;
  background: transparent;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
  color: var(--gray-600);
  font-size: 1rem;
  font-weight: 500;
  position: relative;
}

.tab-button:hover {
  background: white;
  color: var(--gray-800);
}

.tab-button.active {
  background: white;
  color: var(--primary);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.tab-button.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 30%;
  right: 30%;
  height: 3px;
  background: var(--primary);
  border-radius: 2px;
}

.tab-icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: white;
  border: 2px solid var(--gray-200);
  transition: all 0.3s ease;
}

.tab-button.active .tab-icon {
  border-color: var(--primary);
}

.tab-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Tab Content */
.tabs-content {
  background: white;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

.tab-panel-inner {
  display: grid;
  grid-template-columns: 400px 1fr;
  min-height: 450px;
}

.panel-image {
  background: var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.panel-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.panel-content {
  padding: 3rem;
}

.panel-content h3 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 0.5rem;
}

.panel-subtitle {
  font-size: 1.25rem;
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 1rem;
}

.panel-description {
  color: var(--gray-700);
  line-height: 1.7;
  margin-bottom: 2rem;
}

.use-cases-container {
  background: #f8f9fb;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 1.5rem;
  margin-top: 2rem;
}

.panel-section-title {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--gray-500);
  font-weight: 600;
  margin: 0 0 1rem 0;
}

.panel-features {
  list-style: none;
  padding: 0;
  margin: 0;
}

.panel-features li {
  position: relative;
  padding-left: 2rem;
  margin-bottom: 1rem;
  color: var(--gray-700);
  line-height: 1.6;
}

.panel-features li:before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 0;
  color: #4ade80;
  font-weight: 700;
  font-size: 1.1rem;
}

.use-case {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 16px;
  overflow: hidden;
  text-align: left;
  transition: all 0.3s ease;
}

.use-case:hover {
  border-color: var(--primary);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
  transform: translateY(-4px);
}

.use-case-icon {
  position: relative;
  width: 100%;
  height: 200px;
  overflow: hidden;
}

.use-case-icon::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 100px;
  background: linear-gradient(
    to top,
    rgba(255, 255, 255, 1) 0%,
    rgba(255, 255, 255, 0) 100%
  );
  pointer-events: none;
}

.use-case-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.3s ease;
}

.use-case:hover .use-case-icon img {
  transform: scale(1.05);
}

.use-case h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--gray-900);
  padding: 1.5rem 1.5rem 0;
}

.use-case p {
  font-size: 0.9375rem;
  color: var(--gray-600);
  line-height: 1.6;
  padding: 0 1.5rem 1.5rem;
}

/* ===========================
   Awards
   =========================== */

.awards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.award {
  padding: 2rem;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  text-align: center;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.award::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
}

.award:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(40, 86, 214, 0.12);
}

.award-image {
  width: 120px;
  height: 120px;
  object-fit: contain;
  margin: 0 auto 1.5rem;
  display: block;
}

.award-year {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 1rem;
}

.award h4 {
  font-size: 1.125rem;
  margin-bottom: 0.75rem;
  color: var(--gray-900);
}

.award p {
  font-size: 0.9375rem;
  color: var(--gray-600);
}

/* ===========================
   News Section
   =========================== */

.brand-highlight {
  font-style: italic;
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.news-card {
  background: var(--white);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--gray-200);
  border-left: 4px solid var(--primary);
}

.news-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(40, 86, 214, 0.15);
  border-left-color: var(--secondary);
}

.news-image {
  width: 100%;
  height: 240px;
  overflow: hidden;
  background: var(--gray-100);
}

.news-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.news-card:hover .news-image img {
  transform: scale(1.05);
}

.news-content {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.news-category {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #e74c3c;
  margin-bottom: 0.75rem;
  display: inline-block;
}

.news-title {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--gray-900);
  margin-bottom: 1rem;
}

.news-description {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--gray-600);
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.news-link {
  font-size: 0.9375rem;
  font-weight: 600;
  color: #e74c3c;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  transition: gap 0.3s ease;
}

.news-link:hover {
  gap: 0.5rem;
}

/* ===========================
   About Us Section
   =========================== */

.about-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  max-width: 900px;
  margin: 0 auto;
  padding: 0;
}

.about-logo {
  flex-shrink: 0;
}

.company-logo {
  width: 450px;
  height: auto;
  object-fit: contain;
}

.about-text {
  flex: 1;
  text-align: center;
  width: 100%;
}

.about-title {
  font-size: 3rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

.about-description {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--gray-600);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 1rem;
  text-align: left;
}

.about-description:last-child {
  margin-bottom: 0;
}

@media (max-width: 768px) {
  .company-logo {
    width: 200px;
  }

  .about-title {
    font-size: 2rem;
  }

  .about-description {
    font-size: 1rem;
    max-width: 100%;
  }
}

/* ===========================
   FAQ Section
   =========================== */

.faq-container {
  max-width: 900px;
  margin: 0 auto;
}

.faq-item {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  padding: 0;
  margin-bottom: 1rem;
  transition: all 0.3s ease;
  overflow: hidden;
  border-left: 4px solid transparent;
}

.faq-item:hover {
  border-color: var(--gray-200);
  border-left-color: var(--primary);
  box-shadow: 0 4px 16px rgba(40, 86, 214, 0.1);
}

.faq-item.active {
  border-left-color: var(--secondary);
  background: linear-gradient(90deg, rgba(139, 92, 246, 0.03), transparent);
}

.faq-question {
  width: 100%;
  background: transparent;
  border: none;
  font-size: 1.125rem;
  font-weight: 600;
  color: #1e3a8a;
  padding: 2rem;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  line-height: 1.4;
  transition: all 0.3s ease;
}

.faq-question:hover {
  background: rgba(30, 58, 138, 0.05);
}

.faq-icon {
  font-size: 0.875rem;
  transition: transform 0.3s ease;
  flex-shrink: 0;
  margin-left: 1rem;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 2rem;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 0 2rem 2rem 2rem;
}

.faq-answer p {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--gray-600);
  margin: 0;
}

/* ===========================
   CTA Section
   =========================== */

.cta-title {
  font-size: 3.5rem;
  margin-bottom: 1.5rem;
  color: var(--gray-900);
}

.cta-subtitle {
  font-size: 1.5rem;
  color: var(--gray-600);
  margin-bottom: 3rem;
}

/* ===========================
   Contact
   =========================== */

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  max-width: 800px;
  margin: 0 auto;
}

.contact-item {
  text-align: center;
  padding: 2rem 1.5rem;
  background: var(--white);
  border-radius: 16px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  border: 1px solid var(--gray-200);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.contact-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
}

.contact-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(40, 86, 214, 0.15);
}

.contact-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
  color: var(--primary);
}

.contact-item h3 {
  font-size: 1.125rem;
  margin-bottom: 1rem;
  color: var(--gray-900);
}

.contact-item a {
  color: var(--primary);
  font-size: 1.125rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

.contact-item a:hover {
  color: var(--secondary);
}

/* ===========================
   Footer
   =========================== */

.footer {
  background: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
  color: var(--white);
  padding: 3rem 0 1.5rem;
  border-top: 4px solid var(--primary);
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand {
  width: 100%;
  text-align: center;
}

.footer-logo {
  margin-bottom: 1.5rem;
}

.footer-logo-img {
  height: 52px;
  width: auto;
  display: block;
  filter: brightness(0) invert(1);
  margin: 0 auto;
}

.footer-brand p {
  color: var(--gray-400);
  font-size: 1.125rem;
  line-height: 1.7;
  margin-bottom: 0.75rem;
}

.footer-brand a {
  color: var(--primary);
  font-weight: 500;
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.footer-tagline {
  margin-top: 1.5rem;
  color: var(--gray-500);
  font-style: italic;
}

.footer-links {
  display: flex;
  gap: 4rem;
  flex-wrap: wrap;
}

.footer-col h4 {
  font-size: 0.875rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--white);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

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

.footer-col li {
  margin-bottom: 0.875rem;
}

.footer-col a {
  color: var(--gray-400);
  font-size: 0.9375rem;
  text-decoration: none;
  transition: all 0.2s ease;
  display: inline-block;
}

.footer-col a:hover {
  color: var(--white);
  transform: translateX(4px);
}

.footer-bottom {
  padding-top: 2rem;
  text-align: center;
}

.footer-bottom p {
  color: var(--gray-500);
  font-size: 0.875rem;
}

/* ===========================
   Back to Top
   =========================== */

.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 56px;
  height: 56px;
  background: var(--gray-900);
  color: var(--white);
  border: none;
  border-radius: 50%;
  font-size: 1.5rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--primary-gradient);
  transform: translateY(-4px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

/* ===========================
   Responsive
   =========================== */

@media (max-width: 1024px) {
  .hero-logo {
    max-width: 500px;
  }

  .hero-title {
    font-size: 3.5rem;
  }

  .section-title {
    font-size: 2.5rem;
  }

  .problem-grid,
  .tech-grid,
  .validation-grid,
  .awards-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  /* Tab Interface - Tablet */
  .tab-panel-inner {
    grid-template-columns: 1fr;
  }

  .panel-image {
    height: 300px;
  }

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

  .footer-content {
    flex-direction: column;
    gap: 3rem;
  }

  .footer-brand {
    max-width: 100%;
  }

  .footer-links {
    gap: 2.5rem;
  }
}

/* ===========================
   Tablet Styles - 768px and below
   =========================== */
@media (max-width: 768px) {
  /* Container adjustments */
  .container {
    padding: 0 1.5rem;
  }
  
  /* Navigation */
  .nav-menu {
    position: fixed;
    top: 73px;
    right: -100%;
    width: 260px;
    height: calc(100vh - 73px);
    background: var(--white);
    flex-direction: column;
    padding: 2rem 1.5rem;
    box-shadow: -4px 0 12px rgba(0, 0, 0, 0.1);
    transition: right 0.3s ease;
    align-items: flex-start;
    gap: 1.5rem;
    z-index: 999;
    overflow-y: auto;
  }

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

  .hamburger {
    display: flex;
  }

  .hamburger.active span:nth-child(1) {
    transform: rotate(45deg);
    position: relative;
    top: 7px;
  }

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

  .hamburger.active span:nth-child(3) {
    transform: rotate(-45deg);
    position: relative;
    top: -7px;
  }

  /* Section spacing */
  .section {
    padding: 4rem 0;
  }

  /* Hero section */
  .hero {
    padding: 5rem 0 4rem;
    min-height: auto;
  }

  .hero-logo {
    max-width: 400px;
  }

  .hero-title {
    font-size: 2.25rem;
    line-height: 1.2;
  }

  .hero-subtitle {
    font-size: 1.125rem;
  }

  .hero-cta {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 1rem;
  }
  
  .hero-cta .btn {
    flex: 1;
    min-width: 200px;
  }

  .hero-stats {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 2rem;
  }
  
  /* Section headers */
  .section-title {
    font-size: 2.25rem;
  }
  
  .section-subtitle {
    font-size: 1.125rem;
  }
  
  /* Comparison cards */
  .comparison-grid {
    gap: 1.5rem;
  }
  
  .comparison-card {
    margin-bottom: 1rem;
  }
  
  /* CTA section */
  .cta-title {
    font-size: 2rem;
  }

  .cta-subtitle {
    font-size: 1.125rem;
  }

  /* Tab Interface - Mobile */
  .tabs-header {
    flex-direction: column;
    gap: 0.5rem;
  }

  .tab-button {
    flex-direction: row;
    padding: 1rem 1.5rem;
  }

  .tab-icon {
    width: 45px;
    height: 45px;
  }

  .panel-content {
    padding: 2rem 1.5rem;
  }

  .panel-content h3 {
    font-size: 1.5rem;
  }

  .panel-subtitle {
    font-size: 1.125rem;
  }

  .news-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .contact-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .footer-content {
    flex-direction: column;
    gap: 2.5rem;
    padding-bottom: 2rem;
  }

  .footer-links {
    flex-direction: column;
    gap: 2rem;
  }

  .footer {
    padding: 3rem 0 1.5rem;
  }
}

/* ===========================
   Video Modal
   =========================== */

.video-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 10000;
}

.video-modal.active {
  display: block;
}

.video-modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
}

.video-modal-content {
  position: relative;
  width: 90%;
  max-width: 1200px;
  height: 80%;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 10001;
}

.video-modal-close {
  position: absolute;
  top: -50px;
  right: 0;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  transition: transform 0.2s ease;
  z-index: 10002;
}

.video-modal-close:hover {
  transform: scale(1.1);
}

.video-wrapper {
  width: 100%;
  height: 100%;
  background: #000;
  border-radius: 8px;
  overflow: hidden;
}

.video-wrapper iframe {
  width: 100%;
  height: 100%;
}

/* ===========================
   Mobile Styles - 480px and below
   =========================== */
@media (max-width: 480px) {
  /* Prevent horizontal scroll */
  html, body {
    overflow-x: hidden;
    width: 100%;
  }
  
  /* Container adjustments */
  .container {
    padding: 0 1rem;
    max-width: 100%;
  }
  
  .container-wide {
    padding: 0 1rem;
    max-width: 100%;
  }

  /* Navigation */
  .navbar {
    padding: 1rem 0;
    width: 100%;
  }
  
  .navbar .container-wide {
    padding: 0 1rem;
  }
  
  .logo-img {
    height: 35px;
  }
  
  .nav-menu {
    width: 250px;
    padding: 2rem 1.5rem;
    top: 65px;
    height: calc(100vh - 65px);
  }
  
  .nav-link {
    font-size: 1rem;
    padding: 0.75rem 0;
  }
  
  .btn-nav {
    font-size: 0.95rem;
    padding: 0.75rem 1.5rem;
    width: 100%;
    text-align: center;
  }
  
  /* Hamburger menu fix */
  .hamburger {
    width: 32px;
    height: 32px;
    padding: 6px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 4px;
    position: relative;
  }
  
  .hamburger span {
    width: 20px;
    height: 2px;
    margin: 0;
    background: var(--gray-800);
    border-radius: 1px;
    transition: all 0.3s ease;
    position: relative;
    transform-origin: center;
  }
  
  .hamburger.active span {
    background: var(--gray-800);
  }
  
  .hamburger.active span:nth-child(1) {
    transform: rotate(45deg);
    top: 6px;
  }
  
  .hamburger.active span:nth-child(2) {
    opacity: 0;
  }
  
  .hamburger.active span:nth-child(3) {
    transform: rotate(-45deg);
    top: -6px;
  }

  /* Hero Section */
  .hero {
    padding: 4rem 0;
    min-height: auto;
    width: 100%;
    overflow: hidden;
  }
  
  .hero-content {
    width: 100%;
    max-width: 100%;
  }
  
  .hero-logo {
    max-width: 250px;
    margin: 0 auto 1.5rem;
    width: 90%;
  }

  .hero-title {
    font-size: 1.75rem;
    line-height: 1.3;
    margin-bottom: 1rem;
    padding: 0 0.5rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
    line-height: 1.5;
    margin-bottom: 2rem;
  }
  
  .hero-cta {
    flex-direction: column;
    gap: 1rem;
  }
  
  .hero-stats {
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 3rem;
  }
  
  .stat {
    text-align: center;
  }
  
  .stat-value {
    font-size: 2rem;
  }
  
  .stat-label {
    font-size: 0.875rem;
  }

  /* Buttons */
  .btn-lg,
  .btn-xl {
    padding: 0.875rem 1.75rem;
    font-size: 0.95rem;
    width: 100%;
  }
  
  /* Section spacing */
  .section {
    padding: 3rem 0;
    width: 100%;
    overflow: hidden;
  }
  
  .section-alt {
    width: 100%;
    overflow: hidden;
  }
  
  /* Section headers */
  .section-title {
    font-size: 1.75rem;
    line-height: 1.3;
    margin-bottom: 0.75rem;
  }
  
  .section-subtitle {
    font-size: 1rem;
    line-height: 1.5;
  }
  
  /* Problem cards */
  .problem-grid {
    gap: 1rem;
  }
  
  .problem-card {
    padding: 1.5rem;
  }
  
  .problem-card h3 {
    font-size: 1.125rem;
  }
  
  .problem-card p {
    font-size: 0.875rem;
  }
  
  /* Comparison section */
  .comparison-section {
    margin-top: 2rem;
    padding: 2rem 0;
  }
  
  .comparison-title {
    font-size: 1.5rem;
    line-height: 1.3;
  }
  
  .comparison-subtitle {
    font-size: 0.95rem;
  }
  
  .comparison-card {
    padding: 0;
  }
  
  .visual-card {
    min-height: 200px;
    padding: 1.5rem;
  }
  
  .visual-card.ai-card {
    padding: 1.5rem;
  }
  
  .visual-card .sample-text {
    font-size: 0.75rem;
    padding: 1rem;
    margin-bottom: 1rem;
  }
  
  .ai-index {
    padding: 1rem;
  }
  
  .ai-index h4 {
    font-size: 0.875rem;
  }
  
  .index-bar {
    height: 30px;
  }
  
  .index-labels {
    font-size: 0.75rem;
  }
  
  .report-header {
    font-size: 1rem;
    padding: 0.75rem;
  }
  
  .report-content {
    padding: 1rem;
  }
  
  .source-list {
    padding: 0.75rem;
    gap: 0.375rem;
  }
  
  .source-item {
    padding: 0.25rem 0;
  }
  
  .source-name {
    font-size: 0.75rem;
  }
  
  .source-percent {
    font-size: 0.75rem;
  }
  
  .comparison-card > h3.card-title {
    font-size: 1.125rem;
    margin: 0 1rem 0.75rem 1rem;
  }
  
  .card-description {
    font-size: 0.875rem;
    margin: 0 1rem 1rem 1rem;
  }
  
  .comparison-list {
    padding: 0 1rem 1rem 1rem;
  }
  
  .comparison-list li {
    font-size: 0.825rem;
    padding-left: 1.5rem;
    margin-bottom: 0.75rem;
  }
  
  /* Video preview */
  .video-preview {
    height: 200px;
  }
  
  /* Feature content */
  .feature-content h3 {
    font-size: 1.5rem;
  }
  
  .feature-list li {
    font-size: 0.875rem;
  }
  
  /* Tech cards */
  .tech-card {
    padding: 1.5rem;
  }
  
  .tech-card h3 {
    font-size: 1.125rem;
  }
  
  .tech-list li {
    font-size: 0.825rem;
  }
  
  /* Screenshot grid */
  .screenshot-grid {
    gap: 1rem;
  }
  
  .screenshot-caption h3 {
    font-size: 1rem;
  }
  
  .screenshot-caption p {
    font-size: 0.825rem;
  }
  
  /* Language tags */
  .language-grid {
    gap: 0.5rem;
  }
  
  .lang-tag {
    font-size: 0.825rem;
    padding: 0.5rem 0.75rem;
  }
  
  /* Validation items */
  .validation-item h3 {
    font-size: 1rem;
  }
  
  .validation-item p {
    font-size: 0.825rem;
  }
  
  /* Tab interface */
  .tabs-header {
    padding: 2px;
  }
  
  .tab-button {
    padding: 0.75rem 1rem;
    font-size: 0.875rem;
  }
  
  .tab-button span {
    font-size: 0.875rem;
  }
  
  .tab-icon {
    width: 35px;
    height: 35px;
  }
  
  .panel-image {
    height: 200px;
  }
  
  .panel-content {
    padding: 1.5rem 1rem;
  }
  
  .panel-content h3 {
    font-size: 1.25rem;
  }
  
  .panel-subtitle {
    font-size: 0.95rem;
    line-height: 1.4;
  }
  
  .panel-description {
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
  }
  
  .use-cases-container {
    padding: 1rem;
    margin-top: 1.5rem;
  }
  
  .panel-section-title {
    font-size: 0.75rem;
    margin-bottom: 0.75rem;
  }
  
  .panel-features li {
    font-size: 0.825rem;
    padding-left: 1.5rem;
    margin-bottom: 0.75rem;
  }
  
  /* Awards */
  .award {
    padding: 1.5rem;
  }
  
  .award h4 {
    font-size: 1rem;
  }
  
  .award p {
    font-size: 0.825rem;
  }

  /* News cards */
  .news-card {
    padding: 0;
  }
  
  .news-image {
    height: 150px;
  }
  
  .news-content {
    padding: 1.25rem;
  }
  
  .news-title {
    font-size: 1rem;
  }
  
  .news-description {
    font-size: 0.825rem;
  }
  
  /* FAQ */
  .faq-question {
    font-size: 0.95rem;
    padding: 1rem;
  }
  
  .faq-answer p {
    font-size: 0.875rem;
    padding: 1rem;
  }
  
  /* Contact */
  .contact-grid {
    gap: 1rem;
    grid-template-columns: 1fr;
  }
  
  .contact-item {
    padding: 1.25rem;
    border-radius: 12px;
  }
  
  .contact-icon {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
  }
  
  .contact-item h3 {
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
  }
  
  .contact-item a {
    font-size: 0.825rem;
  }
  
  /* Footer */
  .footer {
    padding: 2rem 0 1rem;
  }
  
  .footer-content {
    flex-direction: column;
    gap: 2rem;
  }
  
  .footer-links {
    flex-direction: column;
    gap: 1.5rem;
    text-align: center;
  }
  
  .footer h4 {
    font-size: 0.875rem;
  }
  
  .footer-col ul li a {
    font-size: 0.825rem;
  }
  
  /* Modal */
  .video-modal-content {
    width: 95%;
    height: 50%;
  }

  .video-modal-close {
    top: -35px;
    right: -5px;
  }
  
  /* CTA section */
  .cta-title {
    font-size: 1.5rem;
  }
  
  .cta-subtitle {
    font-size: 0.95rem;
  }

  /* Callout */
  .callout p {
    font-size: 1rem;
  }
  
  /* Back to top button */
  .back-to-top {
    width: 40px;
    height: 40px;
    font-size: 1rem;
    bottom: 15px;
    right: 15px;
  }
}