/* ==========================================
   IOVIS - LANDING PAGE STYLES
   Modern, Attractive & Responsive Design
   ========================================== */

/* ==========================================
   RESET & BASE STYLES
   ========================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Colors - Elegant Gold & Deep Blue Palette */
  --primary-color: #d4af37;
  --primary-dark: #b8941f;
  --primary-light: #e8c96f;
  --secondary-color: #1a2332;
  --accent-color: #e85d75;

  --text-primary: #1a2332;
  --text-secondary: #4a5568;
  --text-light: #718096;

  --bg-primary: #fdfcfb;
  --bg-secondary: #f7f5f2;
  --bg-dark: #1a2332;

  /* Gradients - Gold to Deep Blue */
  --gradient-primary: linear-gradient(
    135deg,
    #d4af37 0%,
    #8b7355 50%,
    #1a2332 100%
  );
  --gradient-secondary: linear-gradient(135deg, #e8c96f 0%, #d4af37 100%);
  --gradient-hero: linear-gradient(
    135deg,
    #1a2332 0%,
    #2d3e50 30%,
    #8b7355 70%,
    #d4af37 100%
  );
  --gradient-text: linear-gradient(
    135deg,
    #d4af37 0%,
    #b8941f 50%,
    #8b7355 100%
  );

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;

  /* Typography */
  --font-primary:
    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-display: "Playfair Display", Georgia, serif;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  color: var(--text-primary);
  line-height: 1.6;
  background: var(--bg-primary);
  overflow-x: hidden;
  cursor:
    url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="32" height="32" viewBox="0 0 32 32"><text y="24" font-size="24">⚡</text></svg>')
      16 16,
    auto;
}

/* ==========================================
   NAVIGATION
   ========================================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  transition: var(--transition-normal);
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 900;
  font-size: 1.5rem;
  color: var(--text-primary);
}

.logo-icon {
  font-size: 2rem;
  filter: drop-shadow(0 0 10px rgba(212, 175, 55, 0.6));
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  transition: var(--transition-fast);
  position: relative;
}

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

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: var(--transition-fast);
}

.nav-link:hover::after {
  width: 100%;
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-menu-btn span {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  border-radius: 3px;
  transition: var(--transition-fast);
}

/* ==========================================
   HERO SECTION
   ========================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: calc(var(--spacing-lg) + 80px) var(--spacing-md) var(--spacing-lg);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-hero);
  opacity: 0.05;
  z-index: 0;
}

.hero-bg::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(
    circle,
    rgba(212, 175, 55, 0.08) 0%,
    rgba(26, 35, 50, 0.05) 70%,
    transparent 100%
  );
  animation: pulse 15s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    transform: scale(1) rotate(0deg);
  }
  50% {
    transform: scale(1.2) rotate(180deg);
  }
}

.hero-container {
  position: relative;
  z-index: 1;
  max-width: 1280px;
  width: 100%;
  text-align: center;
}

.hero-content {
  max-width: 900px;
  margin: 0 auto var(--spacing-lg);
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: var(--spacing-md);
}

.title-line {
  display: block;
  animation: fadeInUp 0.8s ease forwards;
  opacity: 0;
}

.title-line:nth-child(1) {
  animation-delay: 0.2s;
}
.title-line:nth-child(2) {
  animation-delay: 0.4s;
}
.title-line:nth-child(3) {
  animation-delay: 0.6s;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.hero-subtitle {
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.8;
  animation: fadeInUp 0.8s ease 0.8s forwards;
  opacity: 0;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease 1s forwards;
  opacity: 0;
}

.btn {
  padding: 1rem 2.5rem;
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 1.1rem;
  text-decoration: none;
  transition: var(--transition-normal);
  cursor: pointer;
  border: 2px solid transparent;
  display: inline-block;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.btn-secondary {
  background: transparent;
  color: var(--primary-color);
  border-color: var(--primary-color);
}

.btn-secondary:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
}

.btn-large {
  padding: 1.25rem 3rem;
  font-size: 1.2rem;
}

.hero-stats {
  display: flex;
  gap: 4rem;
  justify-content: center;
  margin-top: var(--spacing-xl);
  animation: fadeInUp 0.8s ease 1.2s forwards;
  opacity: 0;
}

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

.stat-number {
  font-size: 3rem;
  font-weight: 900;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-top: 0.5rem;
}

/* Hero Value Props - Replacing Stats */
.hero-value-props {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
  animation: fadeInUp 0.8s ease 1.2s forwards;
  opacity: 0;
}

.value-prop {
  text-align: center;
  padding: 2rem 1.5rem;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(212, 175, 55, 0.15);
  transition: var(--transition-normal);
}

.value-prop:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  background: rgba(255, 255, 255, 0.9);
}

.prop-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.value-prop h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.value-prop p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.scroll-indicator {
  position: absolute;
  bottom: 4rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-light);
  font-size: 0.9rem;
  animation: bounce 2s ease-in-out infinite;
  z-index: 10;
}

@keyframes bounce {
  0%,
  100% {
    transform: translateX(-50%) translateY(0);
  }
  50% {
    transform: translateX(-50%) translateY(-10px);
  }
}

.scroll-arrow {
  width: 20px;
  height: 20px;
  border-right: 2px solid var(--text-light);
  border-bottom: 2px solid var(--text-light);
  transform: rotate(45deg);
}

/* ==========================================
   SECTION STYLES
   ========================================== */
.section-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--spacing-lg) var(--spacing-md);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-md);
}

.section-tag {
  display: inline-block;
  padding: 0.5rem 1.5rem;
  background: linear-gradient(
    135deg,
    rgba(212, 175, 55, 0.15) 0%,
    rgba(139, 115, 85, 0.1) 100%
  );
  color: var(--primary-color);
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 1rem;
  border: 1px solid rgba(212, 175, 55, 0.2);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 900;
  margin-bottom: 1rem;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ==========================================
   VIRTUS IOVIS SECTION
   ========================================== */
.virtus-section {
  background: var(--bg-secondary);
  position: relative;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-bottom: var(--spacing-md);
}

.feature-card {
  background: white;
  padding: 2.5rem;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: var(--transition-normal);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: 1.5rem;
  filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.1));
}

.feature-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.feature-description {
  color: var(--text-secondary);
  line-height: 1.7;
}

.virtus-quote {
  text-align: center;
  padding: var(--spacing-md) var(--spacing-md) 0;
}

.virtus-quote blockquote {
  font-family: var(--font-display);
  font-size: 2rem;
  font-style: italic;
  color: var(--text-secondary);
  max-width: 800px;
  margin: 0 auto;
  position: relative;
}

.virtus-quote blockquote::before,
.virtus-quote blockquote::after {
  content: '"';
  font-size: 4rem;
  color: var(--primary-color);
  opacity: 0.25;
}

/* ==========================================
   IOVIS COMBINATOR SECTION
   ========================================== */
.combinator-section {
  background: white;
}

.combinator-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  margin-top: var(--spacing-md);
}

.process-steps {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.process-step {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
}

.step-number {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 900;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  flex-shrink: 0;
}

.step-content h3 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.step-content p {
  color: var(--text-secondary);
  line-height: 1.7;
}
.highlight-box {
  background: linear-gradient(
    135deg,
    rgba(212, 175, 55, 0.05) 0%,
    rgba(139, 115, 85, 0.05) 100%
  );
  padding: 2.5rem;
  border-radius: var(--radius-xl);
  border: 2px solid rgba(212, 175, 55, 0.15);
  margin-bottom: 2rem;
}

.highlight-box h3 {
  font-size: 1.75rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.highlight-box p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

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

.benefit-list li {
  color: var(--text-secondary);
  font-weight: 500;
}

.stats-box {
  background: var(--gradient-primary);
  padding: 2rem;
  border-radius: var(--radius-xl);
  color: white;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.stat-inline {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.stat-value {
  font-size: 2rem;
  font-weight: 900;
}

.stat-desc {
  font-size: 0.9rem;
  opacity: 0.9;
}

/* ==========================================
   INTEGRATION SECTION
   ========================================== */
.integration-section {
  background: var(--bg-dark);
  color: white;
  padding: var(--spacing-lg) 0;
}

.integration-content {
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.integration-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 900;
  margin-bottom: 2rem;
}

.integration-text {
  font-size: 1.25rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--spacing-lg);
}

.integration-diagram {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
  margin-top: var(--spacing-md);
}

.diagram-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.diagram-icon {
  font-size: 4rem;
  width: 120px;
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  backdrop-filter: blur(10px);
}

.diagram-label {
  font-weight: 600;
  font-size: 1.1rem;
}

.diagram-arrow {
  font-size: 2rem;
  color: rgba(255, 255, 255, 0.5);
}

/* ==========================================
   CTA SECTION
   ========================================== */
.cta-section {
  background: var(--bg-secondary);
  padding: var(--spacing-lg) var(--spacing-md);
}

.cta-container {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.cta-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 900;
  margin-bottom: 1.5rem;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cta-text {
  font-size: 1.25rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
}

.cta-buttons {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.cta-note {
  color: var(--text-light);
  font-size: 0.9rem;
  font-style: italic;
}

/* ==========================================
   FOOTER
   ========================================== */
.footer {
  background: var(--bg-dark);
  color: white;
  padding: var(--spacing-lg) var(--spacing-md) var(--spacing-md);
}

.footer-container {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 3fr;
  gap: 4rem;
  margin-bottom: var(--spacing-lg);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 900;
  font-size: 1.5rem;
}

.footer-tagline {
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.7;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.footer-col h4 {
  margin-bottom: 1rem;
  font-weight: 600;
}

.footer-col a {
  display: block;
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  margin-bottom: 0.75rem;
  transition: var(--transition-fast);
}

.footer-col a:hover {
  color: white;
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.5);
}

/* ==========================================
   ANIMATIONS
   ========================================== */
[data-animate] {
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity 0.6s ease,
    transform 0.6s ease;
}

[data-animate].animate-in {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */
@media (max-width: 1024px) {
  .combinator-content {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .footer-container {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .hero {
    padding: var(--spacing-lg) var(--spacing-sm);
  }

  .hero-value-props {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .value-prop {
    padding: 1.5rem 1rem;
  }

  .section-container {
    padding: var(--spacing-lg) var(--spacing-sm);
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .hero-cta,
  .cta-buttons {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
  }

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

  .integration-diagram {
    flex-direction: column;
  }

  .diagram-arrow {
    transform: rotate(90deg);
  }
}

@media (max-width: 480px) {
  .hero-value-props {
    gap: 1rem;
  }

  .process-step {
    flex-direction: column;
    gap: 1rem;
  }

  .step-number {
    font-size: 2rem;
  }
}

/* ==========================================
   UTILITY CLASSES
   ========================================== */
.text-center {
  text-align: center;
}
.text-left {
  text-align: left;
}
.text-right {
  text-align: right;
}

.mt-1 {
  margin-top: var(--spacing-xs);
}
.mt-2 {
  margin-top: var(--spacing-sm);
}
.mt-3 {
  margin-top: var(--spacing-md);
}
.mt-4 {
  margin-top: var(--spacing-lg);
}

.mb-1 {
  margin-bottom: var(--spacing-xs);
}
.mb-2 {
  margin-bottom: var(--spacing-sm);
}
.mb-3 {
  margin-bottom: var(--spacing-md);
}
.mb-4 {
  margin-bottom: var(--spacing-lg);
}

/* ==========================================
   CUSTOM CTA BUTTON ENHANCEMENT
   ========================================== */
.cta-button {
  background: var(--gradient-primary);
  color: white !important;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-lg);
  font-weight: 600;
  box-shadow: var(--shadow-md);
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.cta-button::after {
  display: none;
}

/* ==========================================
   MISSION SECTION
   ========================================== */
.mission-section {
  background: var(--bg-primary);
  padding: var(--spacing-md) 0;
}

.mission-content {
  max-width: 1000px;
  margin: 0 auto;
  text-align: center;
}

.mission-text {
  margin: var(--spacing-md) 0;
  text-align: left;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.lead-text {
  font-size: 1.4rem;
  line-height: 1.8;
  color: var(--text-primary);
  margin-bottom: 2rem;
}

.mission-text p {
  font-size: 1.15rem;
  line-height: 1.9;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
}

.mission-text strong {
  color: var(--primary-color);
  font-weight: 700;
}

.mission-text em {
  font-style: italic;
  color: var(--text-primary);
}

.mission-pillars {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 2rem;
  align-items: center;
  justify-items: center;
  margin-top: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-secondary);
  border-radius: var(--radius-xl);
}

.pillar {
  text-align: center;
  padding: 1.5rem 1rem;
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: var(--transition-normal);
}

.pillar:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.highlight-pillar {
  background: linear-gradient(
    135deg,
    rgba(212, 175, 55, 0.1) 0%,
    rgba(139, 115, 85, 0.05) 100%
  );
  border: 2px solid rgba(212, 175, 55, 0.3);
}

.pillar-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.pillar h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.pillar p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.pillar-connector {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-color);
}

/* ==========================================
   INITIATIVES INTRO SECTION
   ========================================== */
.initiatives-intro {
  background: var(--bg-secondary);
  padding: var(--spacing-md) 0;
  text-align: center;
}

.intro-content {
  max-width: 800px;
  margin: 0 auto;
}

.intro-text {
  font-size: 1.25rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ==========================================
   THESIS CONTENT (Integration Section)
   ========================================== */
.integration-section .section-tag.light {
  background: rgba(255, 255, 255, 0.15);
  color: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.thesis-content {
  margin: var(--spacing-md) 0;
  text-align: left;
}

.thesis-main {
  font-size: 1.5rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.95);
  margin-bottom: 2rem;
  font-weight: 500;
}

.thesis-explanation {
  font-size: 1.2rem;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 1.5rem;
}

.thesis-explanation strong {
  color: var(--primary-color);
  font-weight: 700;
}

.thesis-explanation em {
  font-style: italic;
  color: rgba(255, 255, 255, 0.95);
}

.thesis-highlight {
  background: rgba(212, 175, 55, 0.1);
  border-left: 4px solid var(--primary-color);
  padding: 1.75rem 2rem;
  margin: 2rem 0;
  border-radius: var(--radius-md);
}

.thesis-highlight p {
  font-size: 1.25rem;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.95);
  margin: 0;
}

.thesis-highlight strong {
  color: var(--primary-color);
  font-weight: 700;
}

.thesis-conclusion {
  font-size: 1.3rem;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.95);
  font-weight: 500;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.diagram-label small {
  display: block;
  font-size: 0.85rem;
  margin-top: 0.25rem;
  opacity: 0.8;
}

/* ==========================================
   MODAL STYLES
   ========================================== */
.modal {
  display: none;
  position: fixed;
  z-index: 10000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(5px);
  overflow: auto;
}

.modal.active {
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-content {
  position: relative;
  background: white;
  margin: 2rem auto;
  padding: 0;
  width: 90%;
  max-width: 700px;
  max-height: 90vh;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-2xl);
  overflow: hidden;
}

.modal-content iframe {
  display: block;
  width: 100%;
  height: 85vh;
  border: none;
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  color: var(--text-primary);
  font-size: 2.5rem;
  font-weight: 300;
  cursor: pointer;
  z-index: 10001;
  background: white;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  box-shadow: var(--shadow-md);
  transition: var(--transition-fast);
}

.modal-close:hover {
  background: var(--bg-secondary);
  transform: rotate(90deg);
}

.open-form-btn {
  cursor: pointer;
  border: none;
  font-family: inherit;
}