/* HARMONIC - Home Page Styles (Light Theme)
   =========================================== */

/* Header Section */
.header {
  text-align: center;
  padding: 40px 0 20px;
  border-bottom: 1px solid var(--color-border);
}

.paper-title {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--color-primary);
  line-height: 1.2;
}

/* Hero Section */
.hero {
  min-height: calc(100vh - 60px);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: var(--space-3xl) 0;
  overflow: hidden;
  background: var(--color-bg-primary);
}

.hero-bg {
  display: none;
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: rgba(52, 152, 219, 0.1);
  border: 1px solid rgba(52, 152, 219, 0.2);
  border-radius: var(--radius-full);
  color: var(--color-accent);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: var(--space-xl);
  animation: fadeInUp 0.6s ease forwards;
}

.hero-badge i {
  font-size: 0.9rem;
}

.hero-title {
  font-size: 3rem;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: var(--space-lg);
  animation: fadeInUp 0.6s ease 0.1s forwards;
  opacity: 0;
  color: var(--color-primary);
}

.hero-title .accent {
  color: var(--color-accent);
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  max-width: 700px;
  margin: 0 auto var(--space-xl);
  line-height: 1.7;
  animation: fadeInUp 0.6s ease 0.2s forwards;
  opacity: 0;
}

.hero-description {
  font-size: 1rem;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-2xl);
  animation: fadeInUp 0.6s ease 0.3s forwards;
  opacity: 0;
}

.hero-acronym {
  font-size: 1rem;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-2xl);
  animation: fadeInUp 0.6s ease 0.3s forwards;
  opacity: 0;
}

.hero-acronym span {
  color: var(--color-accent);
  font-weight: 600;
}

.hero-buttons {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
  margin-bottom: var(--space-3xl);
  animation: fadeInUp 0.6s ease 0.4s forwards;
  opacity: 0;
}

.hero-scroll {
  position: absolute;
  bottom: var(--space-2xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-text-muted);
  font-size: 0.8rem;
  animation: fadeIn 1s ease 1s forwards, float 2s ease-in-out infinite;
  opacity: 0;
}

.hero-scroll-icon {
  width: 24px;
  height: 40px;
  border: 2px solid var(--color-text-muted);
  border-radius: var(--radius-full);
  position: relative;
}

.hero-scroll-icon::before {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: var(--color-text-muted);
  border-radius: var(--radius-full);
  animation: scrollDown 1.5s ease-in-out infinite;
}

@keyframes scrollDown {
  0%, 100% { opacity: 0; transform: translateX(-50%) translateY(0); }
  50% { opacity: 1; transform: translateX(-50%) translateY(10px); }
}

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

/* Paper Info Section */
.paper-info {
  padding: var(--space-2xl) 0;
  background: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
}

.paper-title-full {
  font-size: 1.5rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: var(--space-xl);
  color: var(--color-primary);
}

.paper-meta {
  display: flex;
  justify-content: center;
  gap: var(--space-xl);
  flex-wrap: wrap;
  margin-bottom: var(--space-xl);
}

.paper-buttons {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* Authors Section */
.authors-section {
  padding: var(--space-2xl) 0;
}

.authors-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.author-card {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.author-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  text-decoration: none;
}

.author-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
  font-size: 1rem;
  flex-shrink: 0;
}

.author-info {
  flex: 1;
}

.author-name {
  font-weight: 600;
  color: var(--color-primary);
  font-size: 0.95rem;
}

.author-affiliation {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}

.affiliations-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-xl);
  margin-top: var(--space-xl);
}

.affiliation-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

.affiliation-badge {
  width: 24px;
  height: 24px;
  background: var(--color-accent);
  color: white;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 600;
}

/* Features Section */
.features-section {
  padding: var(--space-2xl) 0;
  background: var(--color-bg-secondary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.feature-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-xl);
  transition: all var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.feature-icon-wrapper {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-sm);
  background: rgba(52, 152, 219, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
}

.feature-icon {
  font-size: 1.5rem;
  color: var(--color-accent);
}

.card-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.card-description {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* Demos Preview Section */
.demos-section {
  padding: var(--space-2xl) 0;
}

.demos-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
}

.demo-preview {
  position: relative;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: all var(--transition-base);
  text-decoration: none;
}

.demo-preview:hover {
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  text-decoration: none;
}

.demo-preview-media {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.demo-preview-media img,
.demo-preview-media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.demo-preview:hover .demo-preview-media img,
.demo-preview:hover .demo-preview-media video {
  transform: scale(1.05);
}

.demo-preview-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.6) 0%, rgba(0, 0, 0, 0.2) 50%, transparent 100%);
  display: flex;
  align-items: flex-end;
  padding: var(--space-lg);
}

.demo-preview-number {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  width: 36px;
  height: 36px;
  background: var(--color-accent);
  color: white;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
}

.demo-preview-content {
  padding: var(--space-lg);
}

.demo-preview-tag {
  display: inline-block;
  padding: var(--space-xs) var(--space-sm);
  background: rgba(52, 152, 219, 0.1);
  color: var(--color-accent);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.demo-preview-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--color-primary);
}

.demo-preview-description {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: var(--space-md);
}

.demo-preview-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-accent);
  font-size: 0.9rem;
  font-weight: 500;
}

.demo-preview-link i {
  transition: transform var(--transition-fast);
}

.demo-preview:hover .demo-preview-link i {
  transform: translateX(4px);
}

/* Architecture Preview */
.architecture-preview {
  padding: var(--space-2xl) 0;
  background: var(--color-bg-secondary);
}

.architecture-preview-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

.architecture-preview-text h2 {
  margin-bottom: var(--space-md);
  color: var(--color-primary);
}

.architecture-preview-text p {
  margin-bottom: var(--space-lg);
  color: var(--color-text-secondary);
}

.architecture-preview-list {
  list-style: none;
  margin-bottom: var(--space-xl);
}

.architecture-preview-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
  color: var(--color-text-secondary);
}

.architecture-preview-list li i {
  color: var(--color-accent);
  margin-top: 4px;
}

.architecture-preview-image {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.architecture-preview-image img {
  width: 100%;
  height: auto;
  display: block;
}

/* CTA Section */
.cta-section {
  padding: var(--space-2xl) 0;
  text-align: center;
}

.cta-card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-2xl);
  position: relative;
  overflow: hidden;
}

.cta-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-accent);
}

.cta-title {
  font-size: 1.5rem;
  margin-bottom: var(--space-md);
  color: var(--color-primary);
}

.cta-description {
  max-width: 600px;
  margin: 0 auto var(--space-xl);
  color: var(--color-text-secondary);
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* Publications Preview */
.publications-preview {
  padding: var(--space-2xl) 0;
  background: var(--color-bg-secondary);
}

/* Responsive */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 2.5rem;
  }

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

  .architecture-preview-content {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .architecture-preview-image {
    order: -1;
  }
}

@media (max-width: 768px) {
  .hero {
    min-height: auto;
    padding: calc(60px + var(--space-2xl)) 0 var(--space-2xl);
  }

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

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .hero-scroll {
    display: none;
  }

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

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

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

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.75rem;
  }

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

  .cta-card {
    padding: var(--space-xl);
  }

  .cta-title {
    font-size: 1.25rem;
  }
}