/* ============================================
   Layout & Responsive Grid System
   ============================================ */

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* Navigation */
.navbar {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background-color: var(--color-bg-primary);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(10px);
  background-color: rgba(255, 255, 255, 0.95);
  transition: background-color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

[data-theme="dark"] .navbar {
  background-color: rgba(26, 26, 26, 0.95);
}

.navbar-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) var(--container-padding);
  max-width: var(--container-max-width);
  margin: 0 auto;
}

.navbar-brand {
  font-size: clamp(1.125rem, 3vw, 1.5rem);
  font-weight: 700;
  color: var(--color-text-primary);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.navbar-brand:hover {
  text-decoration: none;
  color: var(--color-accent);
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  list-style: none;
  padding: 0;
  margin: 0;
}

.navbar-link {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.navbar-link:hover,
.navbar-link:focus {
  color: var(--color-accent);
  background-color: var(--color-bg-secondary);
  text-decoration: none;
}

.navbar-link.active {
  color: var(--color-accent);
  background-color: var(--color-bg-secondary);
}

/* Hide Portfolio link if it somehow appears (defensive CSS) */
.navbar-link[href="portfolio.html"],
.navbar-link[href*="portfolio"] {
  display: none !important;
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text-primary);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* Theme Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.theme-toggle:hover {
  background-color: var(--color-bg-tertiary);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
  fill: var(--color-text-primary);
}

/* Main Content */
.main-content {
  min-height: calc(100vh - 200px);
  padding: var(--spacing-3xl) 0;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: var(--spacing-3xl) 0 var(--spacing-2xl);
  background: linear-gradient(180deg, 
    rgba(173, 216, 230, 0.15) 0%,
    rgba(176, 224, 230, 0.12) 20%,
    rgba(175, 238, 238, 0.08) 40%,
    rgba(240, 248, 255, 0.05) 60%,
    rgba(255, 255, 255, 0) 100%
  );
  background-size: 100% 200%;
  animation: gradientFlow 8s ease-in-out infinite;
  position: relative;
  overflow: hidden;
  min-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: 1200px;
  margin: 0 auto;
}

[data-theme="dark"] .hero {
  background: linear-gradient(180deg, 
    rgba(70, 130, 180, 0.12) 0%,
    rgba(65, 105, 225, 0.08) 20%,
    rgba(72, 61, 139, 0.06) 40%,
    rgba(25, 25, 112, 0.04) 60%,
    rgba(0, 0, 0, 0) 100%
  );
  background-size: 100% 200%;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(173, 216, 230, 0.1) 0%, transparent 70%);
  animation: floatGradient 12s ease-in-out infinite;
  pointer-events: none;
  z-index: 0;
}

[data-theme="dark"] .hero::before {
  background: radial-gradient(circle, rgba(70, 130, 180, 0.08) 0%, transparent 70%);
}

.hero > .container {
  position: relative;
  z-index: 1;
}

@keyframes gradientFlow {
  0%, 100% {
    background-position: 0% 0%;
  }
  50% {
    background-position: 0% 100%;
  }
}

@keyframes floatGradient {
  0%, 100% {
    transform: translate(0, 0) scale(1);
    opacity: 0.5;
  }
  33% {
    transform: translate(20%, -20%) scale(1.1);
    opacity: 0.7;
  }
  66% {
    transform: translate(-20%, 20%) scale(0.9);
    opacity: 0.6;
  }
}

/* Removed distracting background animations */

.hero-greeting {
  font-size: var(--font-size-xl);
  color: var(--color-accent);
  margin-bottom: var(--spacing-md);
  opacity: 0;
  animation: fadeInUp 0.6s ease-out 0.2s forwards;
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: clamp(0.875rem, 2vw, 1rem);
}

.typing-animation {
  position: relative;
  display: inline-block;
}

.typing-animation::after {
  content: '|';
  animation: blink 1s infinite;
  margin-left: 2px;
  color: var(--color-accent);
  font-weight: 300;
}

.typing-animation.typing-complete::after {
  animation: none;
  opacity: 0;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

.role-badge {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--color-bg-secondary);
  border-radius: 2rem;
  margin: 0 var(--spacing-xs);
  font-size: var(--font-size-sm);
  transition: all var(--transition-base);
  border: 1px solid var(--color-border);
}

.role-badge:hover {
  background: var(--color-accent);
  color: white;
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--color-shadow);
}

.role-separator {
  color: var(--color-text-muted);
  margin: 0 var(--spacing-xs);
}

.hero-description {
  max-width: 650px;
  margin: 0 auto var(--spacing-2xl);
  color: var(--color-text-secondary);
  font-size: clamp(1rem, 2vw, 1.25rem);
  line-height: 1.7;
  opacity: 0;
  animation: fadeInUp 0.6s ease-out 0.4s forwards;
  font-weight: var(--font-weight-normal);
}

.hero-scroll-indicator {
  position: absolute;
  bottom: var(--spacing-lg);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
  cursor: pointer;
  transition: color var(--transition-fast);
  z-index: 10;
  margin-top: var(--spacing-2xl);
}

.hero-scroll-indicator:hover {
  color: var(--color-accent);
}

.hero-scroll-indicator svg {
  width: 24px;
  height: 24px;
  transition: transform var(--transition-fast);
}

.hero-scroll-indicator:hover svg {
  transform: translateY(4px);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-title {
  font-size: clamp(2.5rem, 8vw, 5rem);
  margin-bottom: var(--spacing-lg);
  opacity: 0;
  animation: fadeInUp 0.6s ease-out 0.3s forwards;
  color: var(--color-text-primary);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.hero-title .typing-animation {
  color: var(--color-text-primary);
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xl);
  font-weight: var(--font-weight-normal);
  opacity: 0;
  animation: fadeInUp 0.6s ease-out 0.5s forwards;
  line-height: 1.8;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeInUp 0.6s ease-out 0.6s forwards;
  margin-bottom: var(--spacing-3xl);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md) var(--spacing-xl);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--border-radius);
  transition: all var(--transition-base);
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  font-size: var(--font-size-base);
  min-width: 140px;
  letter-spacing: 0.02em;
}

.btn-primary {
  background-color: var(--color-accent);
  color: white;
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  text-decoration: none;
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--color-shadow);
}

.pulse-on-hover {
  position: relative;
  overflow: hidden;
}

.pulse-on-hover::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width var(--transition-slow), height var(--transition-slow);
}

.pulse-on-hover:hover::before {
  width: 300px;
  height: 300px;
}

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

.btn-secondary:hover {
  background-color: var(--color-accent);
  color: white;
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--color-shadow);
}

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

.btn-outline:hover {
  background-color: var(--color-bg-secondary);
  border-color: var(--color-text-secondary);
  text-decoration: none;
  color: var(--color-text-primary);
}

/* Cards */
.card {
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  transition: all var(--transition-base);
  box-shadow: 0 2px 4px var(--color-shadow);
  position: relative;
  overflow: hidden;
  width: 100%;
  max-width: 100%;
  display: flex;
  flex-direction: column;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transition: left var(--transition-base);
}

.card:hover::before {
  left: 100%;
}

.card:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 12px 24px var(--color-shadow-hover);
  border-color: var(--color-accent);
}

.card-title {
  font-size: clamp(1.25rem, 3vw, 1.5rem);
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-primary);
  font-weight: 600;
  line-height: 1.3;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  flex-wrap: wrap;
}

.card-meta > span:not(:last-child)::after {
  content: '•';
  margin-left: var(--spacing-sm);
  color: var(--color-text-muted);
  opacity: 0.5;
}

.card-description {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
  flex-grow: 1;
  line-height: 1.6;
}

.card-footer {
  display: flex;
  gap: var(--spacing-md);
  margin-top: auto;
  padding-top: var(--spacing-md);
  flex-wrap: wrap;
  align-items: center;
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--spacing-xl);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  justify-items: center;
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  justify-items: center;
}

/* Tags */
.tag {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  background-color: var(--color-bg-secondary);
  color: var(--color-text-secondary);
  border-radius: var(--border-radius);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.tag:hover {
  background-color: var(--color-accent);
  color: white;
  text-decoration: none;
}

.tag.active {
  background-color: var(--color-accent);
  color: white;
}

/* Search & Filter */
.search-filter-bar {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
}

.search-input {
  flex: 1;
  max-width: 400px;
  min-width: 200px;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  font-size: var(--font-size-base);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.1);
}

.filter-tags {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  justify-content: center;
}

/* Section */
.section {
  margin-bottom: var(--spacing-3xl);
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
  position: relative;
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
}

/* Footer */
.footer {
  background-color: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-xl) 0;
  margin-top: var(--spacing-3xl);
  text-align: center;
  color: var(--color-text-secondary);
}

.footer-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  align-items: center;
}

.social-links {
  display: flex;
  gap: var(--spacing-md);
  list-style: none;
  padding: 0;
  margin: 0;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  transition: all var(--transition-fast);
}

.social-link {
  position: relative;
}

.social-link::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--color-accent);
  opacity: 0;
  transform: scale(0);
  transition: transform var(--transition-base), opacity var(--transition-base);
  z-index: -1;
}

.social-link:hover {
  background-color: transparent;
  color: white;
  text-decoration: none;
  transform: translateY(-2px) scale(1.1);
}

.social-link:hover::after {
  opacity: 1;
  transform: scale(1);
}

/* Form Styles */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  font-size: var(--font-size-base);
  transition: border-color var(--transition-fast);
  font-family: inherit;
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.1);
}

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

.form-error {
  color: #dc3545;
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-xs);
  display: none;
}

.form-error.show {
  display: block;
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: var(--spacing-xl);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: var(--color-border);
}

.timeline-item {
  position: relative;
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -20px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--color-accent);
  border: 2px solid var(--color-bg-primary);
}

.timeline-date {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-xs);
}

.timeline-title {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-xs);
}

.timeline-description {
  color: var(--color-text-secondary);
}

/* Skills Grid */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
}

.skill-item {
  padding: var(--spacing-md);
  background-color: var(--color-bg-secondary);
  border-radius: var(--border-radius);
  text-align: center;
  transition: transform var(--transition-fast);
}

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

.skill-item::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-hover));
  opacity: 0;
  transition: opacity var(--transition-base);
  z-index: -1;
}

.skill-item:hover {
  transform: scale(1.05);
  color: white;
}

.skill-item:hover::after {
  opacity: 1;
}

.skill-item:hover h3,
.skill-item:hover p {
  color: white;
}

/* Responsive Design */
@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }
  
  .navbar-nav {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background-color: var(--color-bg-primary);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: var(--spacing-md);
    gap: var(--spacing-sm);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-base), opacity var(--transition-base), visibility var(--transition-base);
  }
  
  .navbar-nav[aria-expanded="true"] {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .navbar-link {
    display: block;
    padding: var(--spacing-sm);
    width: 100%;
  }
  
  .hero {
    padding: var(--spacing-xl) 0;
  }
  
  .hero-cta {
    flex-direction: column;
    align-items: stretch;
  }
  
  .btn {
    width: 100%;
    justify-content: center;
  }
  
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }
  
  .search-filter-bar {
    flex-direction: column;
    align-items: stretch;
  }
  
  .search-input {
    width: 100%;
  }
  
  .container {
    padding: 0 var(--spacing-md);
  }
  
  .main-content {
    padding: var(--spacing-lg) 0;
  }
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.6s ease-out;
}

/* Enhanced navbar on scroll */
.navbar.scrolled {
  box-shadow: 0 2px 10px var(--color-shadow);
  background-color: rgba(255, 255, 255, 0.95);
}

[data-theme="dark"] .navbar.scrolled {
  background-color: rgba(26, 26, 26, 0.95);
}

/* Smooth gradient text */
.gradient-text {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-hover));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Interactive tag hover */
.tag {
  position: relative;
  overflow: hidden;
}

.tag::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width var(--transition-base), height var(--transition-base);
}

.tag:hover::before {
  width: 200px;
  height: 200px;
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1), 
              transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: opacity, transform;
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Conference Cards - Ensure they work with reveal system */
.conference-card.reveal {
  /* Start visible but allow smooth reveal animation */
  opacity: 0;
  transform: translateY(20px);
}

.conference-card.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Conference Cards */
.conference-card {
  position: relative;
  background: linear-gradient(135deg, 
    var(--color-bg-secondary) 0%, 
    var(--color-bg-primary) 50%,
    var(--color-bg-secondary) 100%);
  border: 2px solid var(--color-border);
  box-shadow: 0 4px 12px rgba(13, 110, 253, 0.08),
              0 2px 4px rgba(0, 0, 0, 0.06);
  overflow: hidden;
}

/* Override base card ::before shimmer effect */
.conference-card::before {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: linear-gradient(135deg, 
    var(--color-accent) 0%, 
    rgba(13, 110, 253, 0.4) 50%,
    var(--color-accent) 100%);
  border-radius: var(--border-radius-lg);
  opacity: 0;
  transition: opacity var(--transition-base);
  pointer-events: none;
  z-index: 0;
}

.conference-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, 
    rgba(13, 110, 253, 0.03) 0%, 
    transparent 50%,
    rgba(13, 110, 253, 0.03) 100%);
  opacity: 0;
  transition: opacity var(--transition-base);
  pointer-events: none;
  z-index: 0;
  border-radius: var(--border-radius-lg);
}

.conference-card > * {
  position: relative;
  z-index: 1;
}

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

.conference-card:hover::after {
  opacity: 1;
}

.conference-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 8px 24px rgba(13, 110, 253, 0.15),
              0 4px 12px rgba(0, 0, 0, 0.1);
  transform: translateY(-6px) scale(1.02);
}

.conference-card .card-image-wrapper {
  position: relative;
  overflow: hidden;
  border-radius: var(--border-radius);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.conference-card .card-image-wrapper::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to bottom, 
    transparent 0%, 
    rgba(13, 110, 253, 0.2) 100%);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.conference-card:hover .card-image-wrapper::after {
  opacity: 1;
}

.conference-card img {
  transition: transform var(--transition-slow);
  filter: brightness(0.95);
}

.conference-card:hover img {
  transform: scale(1.08);
  filter: brightness(1);
}

.conference-type {
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: linear-gradient(135deg, 
    var(--color-accent) 0%, 
    var(--color-accent-hover) 100%);
  color: white;
  padding: 0.375rem 0.875rem;
  border-radius: 1.5rem;
  font-weight: var(--font-weight-semibold);
  display: inline-block;
  box-shadow: 0 2px 6px rgba(13, 110, 253, 0.3);
}

[data-theme="dark"] .conference-card {
  background: linear-gradient(135deg, 
    var(--color-bg-secondary-dark) 0%, 
    var(--color-bg-primary-dark) 50%,
    var(--color-bg-secondary-dark) 100%);
  box-shadow: 0 4px 12px rgba(77, 171, 247, 0.1),
              0 2px 4px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .conference-card::before {
  background: linear-gradient(135deg, 
    var(--color-accent-dark) 0%, 
    rgba(77, 171, 247, 0.5) 50%,
    var(--color-accent-dark) 100%);
}

[data-theme="dark"] .conference-card::after {
  background: linear-gradient(135deg, 
    rgba(77, 171, 247, 0.05) 0%, 
    transparent 50%,
    rgba(77, 171, 247, 0.05) 100%);
}

[data-theme="dark"] .conference-card:hover {
  border-color: var(--color-accent-dark);
  box-shadow: 0 8px 24px rgba(77, 171, 247, 0.2),
              0 4px 12px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .conference-card .card-image-wrapper::after {
  background: linear-gradient(to bottom, 
    transparent 0%, 
    rgba(77, 171, 247, 0.25) 100%);
}

[data-theme="dark"] .conference-type {
  background: linear-gradient(135deg, 
    var(--color-accent-dark) 0%, 
    var(--color-accent-hover-dark) 100%);
  box-shadow: 0 2px 6px rgba(77, 171, 247, 0.4);
}

/* Card Image Wrapper */
.card-image-wrapper {
  position: relative;
  overflow: hidden;
  background: var(--color-bg-tertiary);
}

.card-image-wrapper img {
  transition: transform var(--transition-slow);
}

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