/* ================================
   TALKS SECTION - CLEAN LIST DESIGN
   ================================ */

.talks-section {
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  min-height: 100vh;
}

/* Hero Header */
.talks-hero {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: white;
  padding: 4rem 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.talks-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Ccircle cx='30' cy='30' r='2'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E") repeat;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 1rem;
  text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.hero-subtitle {
  font-size: 1.2rem;
  opacity: 0.9;
  margin-bottom: 2rem;
  font-weight: 300;
}

.talks-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin-top: 2rem;
}

.stat-item {
  text-align: center;
  padding: 1.5rem 2rem;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.stat-number {
  display: block;
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.9rem;
  opacity: 0.8;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 500;
}

/* Talks Container */
.talks-container {
  padding: 4rem 0;
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* Talk Item - Card Style */
.talk-item {
  background: white;
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  border: 1px solid rgba(0,0,0,0.05);
  position: relative;
  overflow: hidden;
}

.talk-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color), var(--accent-color));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.talk-item:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.12);
}

.talk-item:hover::before {
  opacity: 1;
}

.talk-link {
  display: block;
  text-decoration: none;
  color: inherit;
}

/* Talk Content */
.talk-content {
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.talk-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
  margin-bottom: 1rem;
}

.talk-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-color);
  margin: 0;
  line-height: 1.3;
  transition: color 0.3s ease;
  flex: 1;
}

.talk-item:hover .talk-title {
  color: var(--primary-color);
}

.talk-date {
  font-size: 0.9rem;
  color: var(--text-light);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
  padding: 0.5rem 1rem;
  background: var(--bg-light);
  border-radius: 20px;
  border: 1px solid var(--border-color);
}

.talk-date::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--primary-color);
  border-radius: 50%;
}

/* Talk Meta */
.talk-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-bottom: 1rem;
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-light);
  padding: 0.5rem 1rem;
  background: rgba(42, 88, 133, 0.05);
  border-radius: 20px;
  border: 1px solid rgba(42, 88, 133, 0.1);
}

.meta-item i {
  color: var(--primary-color);
  width: 16px;
  text-align: center;
}

/* Talk Summary */
.talk-summary {
  color: var(--text-color);
  line-height: 1.6;
  font-size: 1rem;
  margin: 0;
}

/* Talk Footer */
.talk-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

.talk-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag {
  font-size: 0.75rem;
  padding: 0.3rem 0.8rem;
  background: linear-gradient(135deg, rgba(42, 88, 133, 0.1), rgba(74, 144, 226, 0.1));
  color: var(--primary-color);
  border-radius: 15px;
  font-weight: 500;
  border: 1px solid rgba(42, 88, 133, 0.2);
  transition: all 0.3s ease;
}

.tag:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-1px);
}

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

.action-badges {
  display: flex;
  gap: 0.5rem;
}

.action-badge {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.75rem;
  padding: 0.3rem 0.7rem;
  border-radius: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.video-badge {
  background: rgba(220, 38, 38, 0.1);
  color: #dc2626;
  border: 1px solid rgba(220, 38, 38, 0.2);
}

.slides-badge {
  background: rgba(16, 185, 129, 0.1);
  color: #10b981;
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.read-more {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--primary-color);
  font-weight: 600;
  font-size: 0.9rem;
  transition: all 0.3s ease;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  background: rgba(42, 88, 133, 0.05);
  border: 1px solid rgba(42, 88, 133, 0.1);
}

.read-more i {
  transition: transform 0.3s ease;
}

.talk-item:hover .read-more {
  background: var(--primary-color);
  color: white;
}

.talk-item:hover .read-more i {
  transform: translateX(4px);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--text-light);
}

.empty-icon {
  font-size: 4rem;
  color: var(--primary-color);
  margin-bottom: 2rem;
  opacity: 0.3;
}

.empty-state h3 {
  font-size: 1.5rem;
  color: var(--text-color);
  margin-bottom: 1rem;
}

.empty-state p {
  font-size: 1.1rem;
  max-width: 400px;
  margin: 0 auto;
}

/* ================================
   SINGLE TALK PAGE - BANNER DESIGN
   ================================ */

.talk-single {
  background: #fafafa;
  min-height: 100vh;
}

/* Banner */
.talk-banner {
  height: 400px;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  position: relative;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.talk-banner-default {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  position: relative;
}

.talk-banner-default::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.1'%3E%3Ccircle cx='30' cy='30' r='3'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E") repeat;
}

.banner-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(0,0,0,0.6), rgba(0,0,0,0.3));
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 2rem 0;
  z-index: 2;
}

.banner-content {
  margin-top: auto;
  margin-bottom: 2rem;
}

.banner-content .talk-title {
  font-size: 3rem;
  font-weight: 700;
  color: white;
  margin: 0 0 1.5rem 0;
  line-height: 1.2;
  text-shadow: 0 4px 8px rgba(0,0,0,0.3);
}

.talk-meta-banner {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
}

.talk-meta-banner .meta-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: white;
  font-size: 1rem;
  padding: 0.75rem 1.5rem;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 25px;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.talk-meta-banner .meta-item i {
  color: white;
  font-size: 1.1rem;
}

/* Breadcrumb */
.breadcrumb {
  margin-bottom: auto;
}

.breadcrumb-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: white;
  text-decoration: none;
  font-weight: 500;
  padding: 0.75rem 1.5rem;
  border-radius: 25px;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: all 0.3s ease;
}

.breadcrumb-link:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

/* Talk Header (Below Banner) */
.talk-header {
  background: white;
  border-radius: 16px;
  padding: 2rem;
  margin: -3rem 0 2rem 0;
  box-shadow: 0 8px 32px rgba(0,0,0,0.1);
  position: relative;
  z-index: 3;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.talk-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.talk-meta .meta-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-light);
  font-size: 0.9rem;
  padding: 0.5rem 1rem;
  background: var(--bg-light);
  border-radius: 20px;
  border: 1px solid var(--border-color);
}

.talk-meta .meta-item i {
  color: var(--primary-color);
}

.talk-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* Talk Body */
.talk-body {
  display: grid;
  gap: 2rem;
  margin-bottom: 3rem;
}

.talk-content {
  background: white;
  border-radius: 16px;
  padding: 3rem;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  line-height: 1.7;
  font-size: 1.1rem;
}

.talk-content h2 {
  color: var(--text-color);
  margin: 2.5rem 0 1.5rem 0;
  font-size: 1.8rem;
  position: relative;
  padding-bottom: 0.5rem;
}

.talk-content h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  border-radius: 2px;
}

.talk-content h3 {
  color: var(--secondary-color);
  margin: 2rem 0 1rem 0;
  font-size: 1.4rem;
}

.talk-content p {
  margin-bottom: 1.5rem;
  color: var(--text-color);
}

/* Resources */
.talk-resources {
  background: white;
  border-radius: 16px;
  padding: 3rem;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.talk-resources h2 {
  margin: 0 0 2rem 0;
  color: var(--text-color);
  font-size: 1.8rem;
  text-align: center;
  position: relative;
  padding-bottom: 1rem;
}

.talk-resources h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  border-radius: 2px;
}

.resources-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 2rem;
}

.resource-item {
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
  transition: all 0.3s ease;
}

.resource-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

.resource-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1.5rem;
  background: var(--bg-light);
  border-bottom: 1px solid var(--border-color);
}

.resource-header i {
  color: var(--primary-color);
  font-size: 1.2rem;
}

.resource-header h3 {
  margin: 0;
  font-size: 1.1rem;
  color: var(--text-color);
}

.video-container {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
}

.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

.resource-link {
  display: block;
  text-decoration: none;
  color: inherit;
}

.resource-preview {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 3rem;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  font-weight: 600;
  font-size: 1.1rem;
  transition: background 0.3s ease;
}

.resource-preview:hover {
  background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
}

.resource-preview i {
  font-size: 1.5rem;
}

/* Navigation */
.talk-navigation {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  margin-top: 3rem;
}

.nav-item {
  flex: 1;
  display: block;
  text-decoration: none;
  background: white;
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  transition: all 0.3s ease;
  border: 1px solid var(--border-color);
  max-width: 45%;
}

.nav-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.15);
  border-color: var(--primary-color);
}

.next-talk {
  text-align: right;
}

.nav-direction {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--primary-color);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 1rem;
}

.next-talk .nav-direction {
  justify-content: flex-end;
}

.nav-title {
  color: var(--text-color);
  font-weight: 600;
  line-height: 1.4;
  font-size: 1.1rem;
}

/* ================================
   RESPONSIVE DESIGN
   ================================ */

@media (max-width: 1200px) {
  .resources-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .talks-stats {
    flex-direction: column;
    gap: 1rem;
    align-items: center;
  }
  
  .stat-item {
    min-width: 200px;
  }
  
  .talks-container {
    padding: 2rem 0;
  }
  
  .talk-content {
    padding: 1.5rem;
  }
  
  .talk-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  
  .talk-footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  
  .talk-banner {
    height: 300px;
  }
  
  .banner-content .talk-title {
    font-size: 2rem;
  }
  
  .talk-meta-banner {
    flex-direction: column;
    gap: 1rem;
  }
  
  .header-content {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .talk-content,
  .talk-resources {
    padding: 2rem;
  }
  
  .talk-navigation {
    flex-direction: column;
  }
  
  .nav-item {
    max-width: 100%;
  }
  
  .next-talk {
    text-align: left;
  }
  
  .next-talk .nav-direction {
    justify-content: flex-start;
  }
}

@media (max-width: 576px) {
  .hero-title {
    font-size: 2rem;
  }
  
  .talks-hero {
    padding: 2rem 0;
  }
  
  .talk-title {
    font-size: 1.2rem;
  }
  
  .banner-content .talk-title {
    font-size: 1.5rem;
  }
  
  .talk-banner {
    height: 250px;
  }
  
  .banner-overlay {
    padding: 1rem 0;
  }
  
  .talk-header {
    margin: -2rem 0 1rem 0;
    padding: 1.5rem;
  }
  
  .talk-content,
  .talk-resources {
    padding: 1.5rem;
  }
  
  .nav-item {
    padding: 1.5rem;
  }
  
  .meta-item {
    font-size: 0.8rem;
    padding: 0.4rem 0.8rem;
  }
}

/* ================================
   ANIMATIONS
   ================================ */

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

.talk-item {
  animation: fadeInUp 0.6s ease-out;
  animation-fill-mode: both;
}

.talk-item:nth-child(1) { animation-delay: 0.1s; }
.talk-item:nth-child(2) { animation-delay: 0.2s; }
.talk-item:nth-child(3) { animation-delay: 0.3s; }
.talk-item:nth-child(4) { animation-delay: 0.4s; }
.talk-item:nth-child(5) { animation-delay: 0.5s; }
.talk-item:nth-child(6) { animation-delay: 0.6s; }

@keyframes slideInFromLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.talk-header {
  animation: slideInFromLeft 0.8s ease-out;
}

.talk-content {
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.talk-resources {
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

.resource-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-color);
  background: var(--bg-light);
}

.direct-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--primary-color);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.3s ease;
}

.direct-link:hover {
  color: var(--secondary-color);
}


/* Status badges */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.3rem 0.8rem;
  border-radius: 15px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.status-badge.upcoming {
  background: rgba(34, 197, 94, 0.1);
  color: #22c55e;
  border: 1px solid rgba(34, 197, 94, 0.2);
}

.status-badge.past {
  background: rgba(107, 114, 128, 0.1);
  color: #6b7280;
  border: 1px solid rgba(107, 114, 128, 0.2);
}

.talk-date-status {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.5rem;
}

.talk-status-tags {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 1rem;
}

/* Enhanced action badges */
.action-badge {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.75rem;
  padding: 0.3rem 0.7rem;
  border-radius: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  text-decoration: none;
  transition: all 0.3s ease;
}

.action-badge:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

/* Additional resource previews */
.code-preview {
  background: linear-gradient(135deg, #1f2937, #374151);
}

.demo-preview {
  background: linear-gradient(135deg, #7c3aed, #a855f7);
}

/* Abstract section */
.talk-abstract {
  background: white;
  border-radius: 16px;
  padding: 3rem;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  margin-bottom: 2rem;
}

.talk-abstract h2 {
  margin: 0 0 2rem 0;
  color: var(--text-color);
  font-size: 1.8rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.abstract-content {
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--text-color);
}

/* Takeaways section */
.talk-takeaways {
  background: linear-gradient(135deg, var(--bg-light), #f1f5f9);
  border-radius: 16px;
  padding: 3rem;
  border-left: 4px solid var(--accent-color);
}

.talk-takeaways h2 {
  margin: 0 0 2rem 0;
  color: var(--accent-color);
  font-size: 1.8rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

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

.takeaways-list li {
  padding: 1rem 0;
  border-bottom: 1px solid rgba(243, 156, 18, 0.1);
  position: relative;
  padding-left: 2rem;
  font-size: 1.1rem;
  line-height: 1.6;
}

.takeaways-list li:before {
  content: "💡";
  position: absolute;
  left: 0;
  top: 1rem;
}

.takeaways-list li:last-child {
  border-bottom: none;
}

/* Enhanced navigation */
.nav-meta {
  font-size: 0.8rem;
  color: var(--text-light);
  margin-top: 0.5rem;
}

/* Responsive enhancements */
@media (max-width: 768px) {
  .talk-date-status {
    align-items: flex-start;
  }
  
  .talk-status-tags {
    align-items: flex-start;
    width: 100%;
  }
  
  .header-content {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .talk-abstract,
  .talk-takeaways {
    padding: 2rem;
  }
}

@media (max-width: 576px) {
  .takeaways-list li {
    padding-left: 1.5rem;
    font-size: 1rem;
  }
  
  .talk-abstract h2,
  .talk-takeaways h2 {
    font-size: 1.5rem;
  }
}