/* NISAFETY Conference 2025 - Main Stylesheet */
/* Mobile-first responsive design with modern interactive features */

/* CSS Custom Properties */
:root {
  /* Colors */
  --primary-color: #001659;
  --secondary-color: #ff5e15;
  --accent-color: #ff5e15;
  --text-primary: #333333;
  --text-secondary: #666666;
  --text-light: #999999;
  --background-primary: #ffffff;
  --background-secondary: #f8f9fa;
  --background-dark: #1a1a1a;
  --surface: #ffffff;
  --surface-dark: #2d2d2d;
  --border-color: #e0e0e0;
  --shadow-light: rgba(0, 0, 0, 0.1);
  --shadow-medium: rgba(0, 0, 0, 0.15);
  --shadow-heavy: rgba(0, 0, 0, 0.25);
  
  /* Typography */
  --font-primary: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Font Sizes */
  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-lg: 1.125rem;
  --fs-xl: 1.25rem;
  --fs-2xl: 1.5rem;
  --fs-3xl: 1.875rem;
  --fs-4xl: 2.25rem;
  --fs-5xl: 3rem;
  --fs-6xl: 3.75rem;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Z-index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
}

/* Dark Mode Variables */
[data-theme="dark"] {
  --text-primary: #ffffff;
  --text-secondary: #cccccc;
  --text-light: #999999;
  --background-primary: #1a1a1a;
  --background-secondary: #2d2d2d;
  --surface: #2d2d2d;
  --border-color: #404040;
  --shadow-light: rgba(255, 255, 255, 0.1);
  --shadow-medium: rgba(255, 255, 255, 0.15);
  --shadow-heavy: rgba(255, 255, 255, 0.25);
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Lazy Loading Styles */
.lazy-load {
  opacity: 0;
  transition: opacity 0.3s ease-in-out;
}

.lazy-load.loaded {
  opacity: 1;
}

.lazy-load.skeleton {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
}

@keyframes skeleton-loading {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* Scroll Animations */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-on-scroll.animate-in {
  opacity: 1;
  transform: translateY(0);
}

.animate-fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-fade-up.animate-in {
  opacity: 1;
  transform: translateY(0);
}

.animate-fade-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-fade-left.animate-in {
  opacity: 1;
  transform: translateX(0);
}

.animate-fade-right {
  opacity: 0;
  transform: translateX(30px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-fade-right.animate-in {
  opacity: 1;
  transform: translateX(0);
}

.animate-scale {
  opacity: 0;
  transform: scale(0.8);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-scale.animate-in {
  opacity: 1;
  transform: scale(1);
}

.animate-rotate {
  opacity: 0;
  transform: rotate(-10deg) scale(0.8);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-rotate.animate-in {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

/* Staggered animations */
.animate-stagger > * {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-stagger.animate-in > * {
  opacity: 1;
  transform: translateY(0);
}

.animate-stagger.animate-in > *:nth-child(1) { transition-delay: 0.1s; }
.animate-stagger.animate-in > *:nth-child(2) { transition-delay: 0.2s; }
.animate-stagger.animate-in > *:nth-child(3) { transition-delay: 0.3s; }
.animate-stagger.animate-in > *:nth-child(4) { transition-delay: 0.4s; }
.animate-stagger.animate-in > *:nth-child(5) { transition-delay: 0.5s; }
.animate-stagger.animate-in > *:nth-child(6) { transition-delay: 0.6s; }
.animate-stagger.animate-in > *:nth-child(7) { transition-delay: 0.7s; }
.animate-stagger.animate-in > *:nth-child(8) { transition-delay: 0.8s; }

/* Enhanced Button Animations */
.cta-button, .form-btn, .carousel-btn, .speaker-btn {
  position: relative;
  overflow: hidden;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.cta-button::before, .form-btn::before, .carousel-btn::before, .speaker-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

.cta-button:hover::before, .form-btn:hover::before, .carousel-btn:hover::before, .speaker-btn:hover::before {
  left: 100%;
}

.cta-button:active, .form-btn:active, .carousel-btn:active, .speaker-btn:active {
  transform: scale(0.95);
}

/* Loading States */
.loading {
  position: relative;
  pointer-events: none;
  opacity: 0.7;
}

.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid transparent;
  border-top: 2px solid currentColor;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Pulse Animation for Interactive Elements */
.pulse {
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
  100% {
    transform: scale(1);
  }
}

/* Bounce Animation */
.bounce {
  animation: bounce 1s infinite;
}

@keyframes bounce {
  0%, 20%, 53%, 80%, 100% {
    transform: translate3d(0, 0, 0);
  }
  40%, 43% {
    transform: translate3d(0, -10px, 0);
  }
  70% {
    transform: translate3d(0, -5px, 0);
  }
  90% {
    transform: translate3d(0, -2px, 0);
  }
}

/* Shake Animation for Errors */
.shake {
  animation: shake 0.5s ease-in-out;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
  20%, 40%, 60%, 80% { transform: translateX(5px); }
}

/* Fade In Animation */
.fade-in {
  animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Slide In Animations */
.slide-in-left {
  animation: slideInLeft 0.5s ease-out;
}

@keyframes slideInLeft {
  from {
    transform: translateX(-100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.slide-in-right {
  animation: slideInRight 0.5s ease-out;
}

@keyframes slideInRight {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.slide-in-up {
  animation: slideInUp 0.5s ease-out;
}

@keyframes slideInUp {
  from {
    transform: translateY(100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* Ripple Effect */
.ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: scale(0);
  animation: ripple-animation 0.6s linear;
  pointer-events: none;
}

@keyframes ripple-animation {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* Focus States */
.focused {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Performance Optimizations */
.animate-on-scroll, .animate-fade-up, .animate-fade-left, .animate-fade-right, .animate-scale, .animate-rotate {
  will-change: transform, opacity;
}

.speaker-card, .about-card, .distinguished-speaker-card {
  will-change: transform;
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  .animate-on-scroll, .animate-fade-up, .animate-fade-left, .animate-fade-right, .animate-scale, .animate-rotate, .animate-stagger {
    animation: none;
    transition: none;
  }
  
  .lazy-load {
    opacity: 1;
    transition: none;
  }
  
  .pulse, .bounce, .shake {
    animation: none;
  }
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-primary);
  font-weight: var(--font-weight-regular);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--background-primary);
  transition: background-color var(--transition-base), color var(--transition-base);
  overflow-x: hidden;
}

/* Accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--primary-color);
  color: white;
  padding: 8px;
  text-decoration: none;
  border-radius: var(--radius-md);
  z-index: var(--z-tooltip);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 6px;
}

/* Progress Bar */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  z-index: var(--z-fixed);
  transition: width var(--transition-fast);
}

/* Custom Cursor */
.custom-cursor {
  position: fixed;
  width: 20px;
  height: 20px;
  border: 2px solid var(--primary-color);
  border-radius: 50%;
  pointer-events: none;
  z-index: var(--z-tooltip);
  transition: transform var(--transition-fast);
  mix-blend-mode: difference;
}

.custom-cursor.hover {
  transform: scale(1.5);
  background-color: var(--primary-color);
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--background-primary);
  backdrop-filter: blur(0px);
  border-bottom: 1px solid var(--border-color);
  z-index: var(--z-sticky);
  transition: all var(--transition-base);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
}

[data-theme="dark"] .navbar {
  background: var(--background-primary);
}

[data-theme="dark"] .navbar.scrolled {
  background: rgba(26, 26, 26, 0.98);
  backdrop-filter: blur(20px);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.nav-brand .brand-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--fs-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--primary-color);
  text-decoration: none;
  transition: all var(--transition-base);
}

.brand-logo {
  width: 40px;
  height: 40px;
  object-fit: contain;
  transition: transform var(--transition-base);
}

.brand-text {
  font-size: var(--fs-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--primary-color);
}

.nav-brand .brand-link:hover .brand-logo {
  transform: scale(1.1);
}

.nav-brand .brand-link:hover .brand-text {
  color: var(--secondary-color);
}

.nav-menu {
  display: none;
  list-style: none;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-sm);
  color: var(--text-primary);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  position: relative;
  font-size: var(--fs-sm);
  white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-color);
  background-color: rgba(0, 22, 89, 0.1);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: all var(--transition-base);
  transform: translateX(-50%);
}

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

.theme-toggle {
  background: none;
  border: 2px solid var(--border-color);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-base);
  margin-right: var(--spacing-md);
}

.theme-toggle:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
  transform: rotate(180deg);
}

.mobile-menu-toggle {
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.hamburger-line {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  transition: all var(--transition-base);
  border-radius: 2px;
}

.mobile-menu-toggle.active .hamburger-line:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-toggle.active .hamburger-line:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active .hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* Mobile Menu Overlay */
.mobile-menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  z-index: var(--z-modal-backdrop);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.mobile-menu-overlay.active {
  opacity: 1;
  visibility: visible;
}

.mobile-menu-content {
  position: absolute;
  top: 0;
  right: 0;
  width: 280px;
  height: 100vh;
  background: var(--surface);
  padding: var(--spacing-2xl) var(--spacing-lg);
  transform: translateX(100%);
  transition: transform var(--transition-base);
}

.mobile-menu-overlay.active .mobile-menu-content {
  transform: translateX(0);
}

.mobile-nav-menu {
  list-style: none;
  margin-top: var(--spacing-2xl);
}

.mobile-nav-menu li {
  margin-bottom: var(--spacing-lg);
}

.mobile-nav-link {
  display: block;
  padding: var(--spacing-md);
  color: var(--text-primary);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.mobile-nav-link:hover {
  background: var(--secondary-color);
  color: white;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Section Styles */
section {
  padding: var(--spacing-3xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-title {
  font-size: var(--fs-4xl);
  font-weight: var(--font-weight-bold);
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  width: 60px;
  height: 3px;
  background: var(--secondary-color);
  transform: translateX(-50%);
}

.section-subtitle {
  font-size: var(--fs-lg);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Hero Section */
.hero-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: -1;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0,0,0,0.5), rgba(0,0,0,0.5));
    z-index: 1;
}

#hero-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 0 var(--spacing-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
}

.hero {
  position: relative;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(0, 22, 89, 0.5), rgba(255, 94, 21, 0.5));
}

.hero-carousel {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

.hero-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity var(--transition-slow);
}

.hero-slide.active {
  opacity: 1;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(0, 22, 89, 0.8), rgba(255, 94, 21, 0.8));
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: white;
  max-width: 800px;
  padding: 0 var(--spacing-md);
}

.hero-title {
  font-family: 'UnifrakturMaguntia', serif;
  font-size: var(--fs-5xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-lg);
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
  font-size: var(--fs-xl);
  margin-bottom: var(--spacing-2xl);
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.hero-details {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
  flex-wrap: wrap;
}

.hero-detail-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--fs-lg);
}

/* Countdown Section */
.countdown-section {
  background: #f8fafc;
  color: var(--text-color);
  position: relative;
  overflow: hidden;
}

.countdown-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 80%, rgba(0, 22, 89, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255, 94, 21, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 40% 40%, rgba(0, 22, 89, 0.05) 0%, transparent 50%);
}

.countdown-section .section-title {
  color: var(--primary-color);
  font-weight: var(--font-weight-bold);
}

.countdown-section .section-subtitle {
  color: var(--text-color-secondary);
}

.countdown-container {
  position: relative;
  z-index: 2;
  text-align: center;
}

.countdown {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xl);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-2xl);
}

.countdown-item {
  background: white;
  border: 1px solid rgba(0, 22, 89, 0.1);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl) var(--spacing-lg);
  text-align: center;
  min-width: 120px;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 22, 89, 0.1);
}

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

.countdown-item:hover {
  transform: translateY(-10px) scale(1.05);
  box-shadow: 0 25px 50px rgba(0, 22, 89, 0.2);
  border-color: var(--secondary-color);
}

.countdown-number {
  display: block;
  font-size: var(--fs-4xl);
  font-weight: var(--font-weight-bold);
  line-height: 1;
  margin-bottom: var(--spacing-sm);
  color: var(--primary-color);
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.countdown-label {
  font-size: var(--fs-sm);
  color: var(--text-color-secondary);
  text-transform: uppercase;
  letter-spacing: 2px;
  font-weight: var(--font-weight-semibold);
}

.countdown-cta {
  margin-top: var(--spacing-xl);
}

.countdown-cta .cta-button {
  background: var(--primary-color);
  border: 2px solid var(--primary-color);
  color: white;
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: var(--fs-lg);
  transition: all var(--transition-base);
  box-shadow: 0 10px 25px rgba(0, 22, 89, 0.3);
}

.countdown-cta .cta-button:hover {
  background: var(--secondary-color);
  border-color: var(--secondary-color);
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 15px 35px rgba(255, 94, 21, 0.4);
}

/* CTA Buttons */
.hero-cta {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-xl);
  text-decoration: none;
  font-weight: var(--font-weight-semibold);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.cta-button.primary {
  background: var(--primary-color);
  color: white;
  border: 2px solid var(--primary-color);
}

.cta-button.secondary {
  background: transparent;
  color: white;
  border: 2px solid white;
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.cta-button.primary:hover {
  background: var(--secondary-color);
  border-color: var(--secondary-color);
}

.cta-button.secondary:hover {
  background: var(--secondary-color);
  color: white;
  border-color: var(--secondary-color);
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: var(--spacing-xl);
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  color: white;
  animation: bounce 2s infinite;
}

.scroll-arrow {
  font-size: var(--fs-2xl);
  margin-bottom: var(--spacing-sm);
}

.scroll-text {
  font-size: var(--fs-sm);
  text-transform: uppercase;
  letter-spacing: 1px;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateX(-50%) translateY(0);
  }
  40% {
    transform: translateX(-50%) translateY(-10px);
  }
  60% {
    transform: translateX(-50%) translateY(-5px);
  }
}

/* Animation Classes */
.animate-fade-up {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeUp 0.8s ease forwards;
}

.animate-fade-up.delay-1 {
  animation-delay: 0.2s;
}

.animate-fade-up.delay-2 {
  animation-delay: 0.4s;
}

.animate-fade-up.delay-3 {
  animation-delay: 0.6s;
}

.animate-fade-up.delay-4 {
  animation-delay: 0.8s;
}

@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Lead Speaker Section */
.lead-speaker {
    /* padding-top: 8rem; */
    padding-bottom: 4rem;
}

.lead-speaker-card {
    display: flex;
    gap: 2rem;
    background: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 30px var(--shadow-light);
    overflow: hidden;
}

.lead-speaker-card .speaker-card-image {
    flex: 0 0 300px;
}

.lead-speaker-card .speaker-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.lead-speaker-card .speaker-card-content {
    padding: 2rem;
}

.lead-speaker-card .speaker-title {
    font-size: var(--fs-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--secondary-color);
    margin-top: 0;
}

.lead-speaker-card h3 {
    font-size: var(--fs-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.speaker-bio-scrollable {
    max-height: 250px;
    overflow-y: auto;
    padding-right: 15px;
    margin-top: 1.5rem;
}

.speaker-bio-scrollable p {
  padding: 5px 0;
}

/* About Section */
.about {
  background: var(--background-secondary);
}

.about-content {
  display: block;
  gap: var(--spacing-3xl);
  align-items: center;
  margin-top: var(--spacing-3xl);
}

.speaker-bio-scrollable {
    max-height: 200px; /* Adjust as needed */
    overflow-y: auto;
    padding-right: 15px; /* For scrollbar */
}

.about-video {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 20px 40px var(--shadow-medium);
  width: 100%;
}

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

.about-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
}

.about-card {
  background: var(--surface);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-xl);
  text-align: center;
  box-shadow: 0 10px 30px var(--shadow-light);
  transition: all var(--transition-base);
  border: 1px solid var(--border-color);
}

.about-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px var(--shadow-medium);
}

.card-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-lg);
  color: white;
  font-size: var(--fs-2xl);
}

.about-card h3 {
  font-size: var(--fs-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
}

.about-card p {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Speakers Section */
.speakers-grid {
  display: grid;
  gap: var(--spacing-xl);
}

.speaker-card {
  background: var(--surface);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 10px 30px var(--shadow-light);
  transition: all var(--transition-base);
  position: relative;
}

.speaker-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px var(--shadow-medium);
}

.speaker-image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 1;
}

.speaker-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.speaker-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 22, 89, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.speaker-card:hover .speaker-overlay {
  opacity: 1;
}

.speaker-card:hover .speaker-image img {
  transform: scale(1.1);
}

.speaker-btn {
  background: white;
  color: var(--primary-color);
  border: none;
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-xl);
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
  transition: all var(--transition-base);
}

.speaker-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.speaker-info {
  padding: var(--spacing-lg);
  text-align: center;
}

.speaker-info h3 {
  font-size: var(--fs-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.speaker-info p {
  color: var(--text-secondary);
  font-size: var(--fs-sm);
}

/* Distinguished Speakers Section */
.distinguished-speakers {
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  position: relative;
  overflow: hidden;
}

.distinguished-speakers::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 15% 30%, rgba(0, 22, 89, 0.05) 0%, transparent 40%),
    radial-gradient(circle at 85% 70%, rgba(255, 94, 21, 0.05) 0%, transparent 40%);
  pointer-events: none;
}

.distinguished-speakers .section-header {
  position: relative;
  z-index: 2;
}

/* Speakers Carousel Container */
.speakers-carousel-container {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin: 0 auto;
}

.carousel-wrapper {
  overflow: hidden;
  border-radius: var(--radius-2xl);
  position: relative;
}

.speakers-carousel {
  display: flex;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  gap: var(--spacing-xl);
  padding: var(--spacing-lg);
  width: 100%;
}

.speakers-carousel .distinguished-speaker-card {
  flex: 0 0 calc(33.333% - var(--spacing-xl));
  min-width: 0;
  box-sizing: border-box;
}

.distinguished-speaker-card {
  background: white;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 22, 89, 0.1);
  transition: all var(--transition-base);
  position: relative;
}

.distinguished-speaker-card:hover {
  transform: translateY(-10px) scale(1.02);
  box-shadow: 0 30px 60px rgba(0, 22, 89, 0.15);
}

.speaker-image-container {
  position: relative;
  height: 300px;
  overflow: hidden;
}

.speaker-image-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.distinguished-speaker-card:hover .speaker-image-container img {
  transform: scale(1.05);
}

.speaker-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    45deg,
    rgba(0, 22, 89, 0.8) 0%,
    rgba(255, 94, 21, 0.8) 100%
  );
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: all var(--transition-base);
}

.distinguished-speaker-card:hover .speaker-overlay {
  opacity: 1;
}

.speaker-role {
  background: rgba(255, 255, 255, 0.2);
  color: white;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-full);
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 1px;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.distinguished-speaker-card .speaker-info {
  padding: var(--spacing-2xl);
  text-align: center;
}

.distinguished-speaker-card .speaker-info h3 {
  font-size: var(--fs-xl);
  font-weight: var(--font-weight-bold);
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
  line-height: 1.2;
}

.speaker-title {
  font-size: var(--fs-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--secondary-color);
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.speaker-description {
  color: var(--text-secondary);
  font-size: var(--fs-sm);
  line-height: 1.6;
  margin: 0;
}

/* Carousel Navigation */
.carousel-navigation {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 100%;
  display: flex;
  justify-content: space-between;
  pointer-events: none;
  z-index: 10;
}

.carousel-btn {
  background: rgba(255, 255, 255, 0.95);
  border: none;
  border-radius: 50%;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-base);
  pointer-events: auto;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  backdrop-filter: blur(10px);
  color: var(--primary-color);
}

.carousel-btn:hover {
  background: var(--primary-color);
  color: white;
  transform: scale(1.1);
  box-shadow: 0 6px 20px rgba(0, 22, 89, 0.3);
}

.carousel-btn:active {
  transform: scale(0.95);
}

.carousel-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.carousel-btn:disabled:hover {
  background: rgba(255, 255, 255, 0.95);
  color: var(--primary-color);
  transform: none;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.carousel-btn i {
  font-size: var(--fs-lg);
  font-weight: var(--font-weight-bold);
}

.prev-btn {
  margin-left: var(--spacing-lg);
}

.next-btn {
  margin-right: var(--spacing-lg);
}

/* Carousel Indicators */
.carousel-indicators {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-2xl);
  z-index: 10;
}

.indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: none;
  background: rgba(0, 22, 89, 0.3);
  cursor: pointer;
  transition: all var(--transition-base);
}

.indicator:hover {
  background: rgba(0, 22, 89, 0.6);
  transform: scale(1.2);
}

.indicator.active {
  background: var(--primary-color);
  transform: scale(1.3);
}

/* Distinguished Speakers Responsive */
@media (max-width: 1024px) {
  .speakers-carousel .distinguished-speaker-card {
    flex: 0 0 calc(50% - var(--spacing-lg));
  }
  
  .carousel-navigation {
    display: none;
  }
}

@media (max-width: 768px) {
  .speakers-carousel .distinguished-speaker-card {
    flex: 0 0 calc(100% - var(--spacing-lg));
  }
  
  .speakers-carousel {
    padding: var(--spacing-md);
    gap: var(--spacing-lg);
  }
  
  .speaker-image-container {
    height: 250px;
  }
  
  .distinguished-speaker-card .speaker-info {
    padding: var(--spacing-lg);
  }
  
  .distinguished-speaker-card .speaker-info h3 {
    font-size: var(--fs-lg);
  }
  
  .carousel-indicators {
    margin-top: var(--spacing-xl);
  }
  
  .indicator {
    width: 10px;
    height: 10px;
  }
  
  .sponsorship-tiers {
    grid-template-columns: 1fr;
  }
  
  .sponsorship-options {
    grid-template-columns: 1fr;
  }
  
  .advert-grid {
    grid-template-columns: 1fr;
  }
  
  .target-list {
    flex-direction: column;
    align-items: center;
  }
  
  .sponsorship-contact .contact-details {
    align-items: flex-start;
  }
  
  .sponsorship-contact .contact-item {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-sm);
  }
  
  /* Call for Papers Responsive */
  .nisafetye-logos {
    gap: var(--spacing-lg);
  }
  
  .logo-image {
    width: 60px;
    height: 60px;
  }
  
  .page-title {
    font-size: var(--fs-2xl);
  }
  
  .call-title {
    font-size: var(--fs-xl);
  }
  
  .themes-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
  
  .guidelines-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
  
  .content-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
  
  .dates-table th,
  .dates-table td {
    padding: var(--spacing-sm);
    font-size: var(--fs-sm);
  }
}

/* Schedule Section - HIDDEN */
.schedule {
  display: none !important;
}

.schedule-tabs {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-2xl);
}

.tab-btn {
  background: var(--primary-color);
  border: 2px solid var(--primary-color);
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-xl);
  color: white;
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-base);
}

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

.tab-btn:hover {
  background: var(--secondary-color);
  border-color: var(--secondary-color);
  color: white;
}

.tab-content {
  display: none;
}

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

.schedule-item {
  display: flex;
  gap: var(--spacing-xl);
  padding: var(--spacing-xl);
  background: var(--surface);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-lg);
  box-shadow: 0 5px 15px var(--shadow-light);
  transition: all var(--transition-base);
}

.schedule-item:hover {
  transform: translateX(10px);
  box-shadow: 0 10px 25px var(--shadow-medium);
}

.schedule-time {
  font-size: var(--fs-lg);
  font-weight: var(--font-weight-bold);
  color: var(--primary-color);
  min-width: 100px;
}

.schedule-details h3 {
  font-size: var(--fs-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.schedule-details p {
  color: var(--text-secondary);
}

/* Registration Section */
.registration {
  background: var(--background-secondary);
}

/* Call for Papers Page Styles */
.call-for-papers-header {
  background: linear-gradient(135deg, var(--primary-color) 0%, #002a80 100%);
  color: white;
  padding: var(--spacing-3xl) 0;
  margin-top: 80px; /* Account for fixed navbar */
}

.header-content {
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.nisafetye-logos {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-3xl);
  margin-bottom: var(--spacing-2xl);
}

.logo-image {
  width: 80px;
  height: 80px;
  object-fit: contain;
}

.page-title {
  font-family: 'UnifrakturMaguntia', serif;
  font-size: var(--fs-4xl);
  color: white;
  margin-bottom: var(--spacing-sm);
  line-height: 1.2;
}

.institution-subtitle {
  font-size: var(--fs-xl);
  color: var(--secondary-color);
  margin-bottom: var(--spacing-2xl);
  font-weight: var(--font-weight-semibold);
}

.call-title {
  font-size: var(--fs-3xl);
  font-weight: var(--font-weight-bold);
  color: white;
  margin-bottom: var(--spacing-2xl);
  letter-spacing: 2px;
}

.conference-info {
  text-align: left;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  margin-top: var(--spacing-2xl);
}

.conference-details {
  background: rgba(255, 94, 21, 0.2);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.conference-details p {
  margin-bottom: var(--spacing-sm);
  font-weight: var(--font-weight-medium);
}

.sub-themes-section {
  background: var(--background-secondary);
  padding: var(--spacing-3xl) 0;
}

.themes-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  margin-top: var(--spacing-2xl);
}

.theme-column {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2xl);
}

.theme-group {
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: 0 4px 20px var(--shadow-light);
  border-left: 4px solid var(--primary-color);
  transition: all var(--transition-base);
}

.theme-group:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 30px var(--shadow-medium);
}

.theme-number {
  background: var(--primary-color);
  color: white;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-lg);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-md);
}

.theme-title {
  color: var(--primary-color);
  font-size: var(--fs-lg);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-md);
  line-height: 1.3;
}

.theme-list {
  padding-left: var(--spacing-lg);
  color: var(--text-primary);
}

.theme-list li {
  margin-bottom: var(--spacing-sm);
  line-height: 1.6;
}

.submission-guidelines {
  background: linear-gradient(135deg, var(--primary-color) 0%, #002a80 100%);
  color: white;
  padding: var(--spacing-3xl) 0;
}

.guidelines-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--spacing-3xl);
  align-items: start;
}

.guidelines-main h2 {
  color: white;
  margin-bottom: var(--spacing-2xl);
}

.guidelines-list {
  list-style: none;
  padding: 0;
}

.guidelines-list li {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  border-left: 4px solid var(--secondary-color);
  line-height: 1.6;
}

.key-dates {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
}

.key-dates h3 {
  color: var(--secondary-color);
  font-size: var(--fs-2xl);
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

.dates-table {
  width: 100%;
  border-collapse: collapse;
  color: white;
}

.dates-table th,
.dates-table td {
  padding: var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.dates-table th {
  background: rgba(255, 94, 21, 0.3);
  font-weight: var(--font-weight-bold);
  color: white;
}

.dates-table td {
  font-weight: var(--font-weight-medium);
}

.benefits-submission {
  background: var(--background-secondary);
  padding: var(--spacing-3xl) 0;
}

.content-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--spacing-3xl);
}

.benefits-section h3,
.hosting-info h3 {
  color: var(--primary-color);
  font-size: var(--fs-2xl);
  margin-bottom: var(--spacing-lg);
  font-weight: var(--font-weight-bold);
}

.benefits-list {
  list-style: none;
  padding: 0;
  margin-bottom: var(--spacing-2xl);
}

.benefits-list li {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  border-left: 4px solid var(--secondary-color);
  box-shadow: 0 2px 10px var(--shadow-light);
  line-height: 1.6;
  position: relative;
}

.benefits-list li::before {
  content: '✓';
  position: absolute;
  left: var(--spacing-md);
  top: var(--spacing-lg);
  color: var(--secondary-color);
  font-weight: var(--font-weight-bold);
  font-size: var(--fs-lg);
}

.benefits-list li {
  padding-left: var(--spacing-3xl);
}

.hosting-info {
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  box-shadow: 0 4px 20px var(--shadow-light);
  height: fit-content;
}

.signature-section {
  margin-top: var(--spacing-2xl);
  padding-top: var(--spacing-lg);
  border-top: 2px solid var(--border-color);
}

.signature-section h4 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
}

.signature p {
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
  font-weight: var(--font-weight-medium);
}

/* Sponsorship Section */
.sponsorship {
  background: linear-gradient(135deg, var(--primary-color) 0%, #002a80 100%);
  color: white;
  padding: var(--spacing-3xl) 0;
}

.sponsorship .section-title {
  color: white;
  font-size: var(--fs-3xl);
  margin-bottom: var(--spacing-md);
  text-align: center;
}

.sponsorship .section-subtitle {
  color: rgba(255, 255, 255, 0.9);
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.sponsorship-content h3 {
  color: var(--secondary-color);
  font-size: var(--fs-2xl);
  margin-bottom: var(--spacing-lg);
  text-align: center;
  font-weight: var(--font-weight-bold);
}

.sponsorship-tiers {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-3xl);
}

.sponsor-tier {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  border: 2px solid transparent;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.sponsor-tier::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--secondary-color), #ffb347);
}

.sponsor-tier.titanium::before {
  background: linear-gradient(90deg, #b8b8b8, #e8e8e8);
}

.sponsor-tier.platinum::before {
  background: linear-gradient(90deg, #e5e4e2, #ffffff);
}

.sponsor-tier.diamond::before {
  background: linear-gradient(90deg, #b9f2ff, #ffffff);
}

.sponsor-tier.gold::before {
  background: linear-gradient(90deg, #ffd700, #ffed4e);
}

.sponsor-tier.silver::before {
  background: linear-gradient(90deg, #c0c0c0, #e8e8e8);
}

.sponsor-tier:hover {
  transform: translateY(-5px);
  border-color: var(--secondary-color);
  box-shadow: 0 10px 30px rgba(255, 94, 21, 0.3);
}

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

.tier-header h4 {
  font-size: var(--fs-xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-sm);
  color: white;
}

.tier-price {
  font-size: var(--fs-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--secondary-color);
  background: rgba(255, 94, 21, 0.2);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  display: inline-block;
}

.tier-benefits {
  list-style: none;
  padding: 0;
}

.tier-benefits li {
  padding: var(--spacing-sm) 0;
  position: relative;
  padding-left: var(--spacing-lg);
  line-height: 1.6;
}

.tier-benefits li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--secondary-color);
  font-weight: var(--font-weight-bold);
  font-size: var(--fs-lg);
}

.other-sponsorship {
  margin-bottom: var(--spacing-3xl);
}

.sponsorship-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.sponsorship-option {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  border-left: 4px solid var(--secondary-color);
  transition: all var(--transition-base);
}

.sponsorship-option:hover {
  transform: translateX(5px);
  background: rgba(255, 255, 255, 0.15);
}

.sponsorship-option h4 {
  color: white;
  font-size: var(--fs-lg);
  margin-bottom: var(--spacing-sm);
  font-weight: var(--font-weight-semibold);
}

.sponsorship-option p {
  color: rgba(255, 255, 255, 0.8);
  margin: 0;
}

.advert-options {
  margin-bottom: var(--spacing-3xl);
}

.advert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
}

.advert-option {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  text-align: center;
  transition: all var(--transition-base);
  border: 2px solid transparent;
}

.advert-option:hover {
  border-color: var(--secondary-color);
  transform: scale(1.02);
}

.advert-option strong {
  color: white;
  font-size: var(--fs-lg);
}

.target-sponsors {
  margin-bottom: var(--spacing-3xl);
}

.target-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  justify-content: center;
}

.target-item {
  background: var(--secondary-color);
  color: white;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-xl);
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-base);
}

.target-item:hover {
  background: #ff7a42;
  transform: scale(1.05);
}

.sponsorship-contact {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  text-align: center;
}

.sponsorship-contact h3 {
  margin-bottom: var(--spacing-lg);
}

.sponsorship-contact .contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  align-items: center;
}

.sponsorship-contact .contact-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  color: white;
  font-size: var(--fs-lg);
}

.sponsorship-contact .contact-item i {
  color: var(--secondary-color);
  font-size: var(--fs-xl);
}

/* Conference Fees Section */
.conference-fees {
  margin-bottom: var(--spacing-3xl);
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  padding: var(--spacing-3xl);
  border-radius: var(--radius-2xl);
  box-shadow: 0 20px 40px rgba(0, 22, 89, 0.1);
  position: relative;
  overflow: hidden;
}

.conference-fees::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 10% 20%, rgba(0, 22, 89, 0.05) 0%, transparent 20%),
    radial-gradient(circle at 90% 80%, rgba(255, 94, 21, 0.05) 0%, transparent 20%);
  pointer-events: none;
}

.conference-fees h3 {
  text-align: center;
  font-size: var(--fs-2xl);
  color: var(--primary-color);
  margin-bottom: var(--spacing-2xl);
  position: relative;
  z-index: 2;
  font-weight: var(--font-weight-bold);
}

.conference-fees h3::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  width: 60px;
  height: 3px;
  background: var(--secondary-color);
  transform: translateX(-50%);
}

.fees-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
  position: relative;
  z-index: 2;
}

.fee-card {
  background: white;
  padding: var(--spacing-2xl);
  border-radius: var(--radius-xl);
  text-align: center;
  border: 2px solid rgba(0, 22, 89, 0.1);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 22, 89, 0.08);
}

.fee-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 5px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  transition: all var(--transition-base);
}

.fee-card:hover {
  border-color: var(--secondary-color);
  transform: translateY(-10px) scale(1.02);
  box-shadow: 0 25px 50px rgba(0, 22, 89, 0.15);
}

.fee-card:hover::before {
  height: 8px;
}

.fee-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-lg);
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-xl);
  color: white;
  transition: all var(--transition-base);
  box-shadow: 0 10px 25px rgba(0, 22, 89, 0.2);
}

.fee-card:hover .fee-icon {
  transform: scale(1.1) rotate(5deg);
  box-shadow: 0 15px 35px rgba(0, 22, 89, 0.3);
}

.fee-card h4 {
  font-size: var(--fs-lg);
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
  font-weight: var(--font-weight-bold);
}

.price {
  font-size: var(--fs-3xl);
  font-weight: var(--font-weight-bold);
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-sm);
  display: block;
}

.fee-card p {
  color: var(--text-secondary);
  font-size: var(--fs-sm);
  margin-bottom: var(--spacing-md);
}

.fee-badge {
  background: linear-gradient(135deg, var(--secondary-color), #ff7b3d);
  color: white;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-full);
  font-size: var(--fs-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 1px;
  display: inline-block;
  margin-top: var(--spacing-sm);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

/* Individual card styles */
.fee-card.early-bird:hover {
  border-color: #10b981;
}

.fee-card.early-bird .fee-icon {
  background: linear-gradient(135deg, #10b981, #34d399);
}

.fee-card.student:hover {
  border-color: #3b82f6;
}

.fee-card.student .fee-icon {
  background: linear-gradient(135deg, #3b82f6, #60a5fa);
}

.fee-card.online:hover {
  border-color: #8b5cf6;
}

.fee-card.online .fee-icon {
  background: linear-gradient(135deg, #8b5cf6, #a78bfa);
}

.fee-card.international:hover {
  border-color: #f59e0b;
}

.fee-card.international .fee-icon {
  background: linear-gradient(135deg, #f59e0b, #fbbf24);
}

.payment-details {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
  padding-top: var(--spacing-2xl);
  border-top: 2px solid var(--border-color);
}

.payment-details h4 {
  font-size: var(--fs-lg);
  color: var(--primary-color);
  margin-bottom: var(--spacing-lg);
  font-weight: var(--font-weight-semibold);
}

.payment-details span {
  font-weight: 500;
  font-size: 14px;
  color: #333 !important;
  padding-top: 15px;
}

.bank-info {
  background: var(--background-secondary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--primary-color);
}

.bank-detail {
  margin-bottom: var(--spacing-sm);
  padding: var(--spacing-xs) 0;
  color: var(--text-primary);
}

.bank-detail strong {
  color: var(--primary-color);
  font-weight: var(--font-weight-semibold);
}

.registration-deadlines {
  background: var(--background-secondary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--secondary-color);
}

.registration-deadlines p {
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.registration-deadlines strong {
  color: var(--secondary-color);
  font-weight: var(--font-weight-semibold);
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }

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

  .hero-title {
    font-size: var(--fs-4xl);
  }

  .hero-subtitle {
    font-size: var(--fs-lg);
  }

  .hero-details {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .countdown {
    gap: var(--spacing-lg);
  }

  .countdown-item {
    min-width: 80px;
    padding: var(--spacing-lg);
  }

  .countdown-number {
    font-size: var(--fs-3xl);
  }

  .lead-speaker-card {
    flex-direction: column;
  }

  .lead-speaker-card .speaker-card-image {
    flex: 0 0 auto;
    width: 100%;
    height: 250px;
  }

  .about-content {
    margin-top: var(--spacing-xl);
  }

  .about-cards {
    grid-template-columns: 1fr;
  }

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

  .schedule-item {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .schedule-time {
    min-width: auto;
    text-align: center;
  }

  .registration-form-container {
    padding: var(--spacing-xl);
  }

  .section-title {
    font-size: var(--fs-3xl);
  }

  .section-subtitle {
    font-size: var(--fs-base);
  }
}

@media (max-width: 480px) {
  .nav-container {
    padding: 0 var(--spacing-sm);
  }

  .hero-title {
    font-size: var(--fs-3xl);
  }

  .hero-subtitle {
    font-size: var(--fs-base);
  }

  .cta-button {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--fs-sm);
  }

  .countdown-item {
    min-width: 70px;
    padding: var(--spacing-md);
  }

  .countdown-number {
    font-size: var(--fs-2xl);
  }

  .mobile-menu-content {
    width: 250px;
  }

  .section-title {
    font-size: var(--fs-2xl);
  }

  .section-subtitle {
    font-size: var(--fs-sm);
  }
  
  .fees-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .fee-icon {
    width: 60px;
    height: 60px;
    font-size: var(--fs-lg);
  }
  
  .fee-card {
    padding: var(--spacing-lg);
  }
}
.registration {
  background: var(--background-secondary);
}

.registration-form-container {
  display: none !important;
}

.form-progress {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

.progress-step {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--border-color);
  color: var(--text-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-bold);
  transition: all var(--transition-base);
}

.progress-step.active {
  background: var(--primary-color);
  color: white;
}

.form-step {
  display: none;
}

.form-step.active {
  display: block;
}

.form-step h3 {
  font-size: var(--fs-xl);
  color: var(--primary-color);
  margin-bottom: var(--spacing-xl);
  text-align: center;
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

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

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-md);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: var(--fs-base);
  transition: all var(--transition-base);
  background: var(--surface);
  color: var(--text-primary);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(5, 140, 82, 0.1);
  transform: translateY(-2px);
}

.error-message {
  color: #e74c3c;
  font-size: var(--fs-sm);
  margin-top: var(--spacing-xs);
  display: block;
}

.form-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: space-between;
}

.form-btn {
  padding: var(--spacing-md) var(--spacing-xl);
  border: none;
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.next-btn,
.submit-btn {
  background: var(--primary-color);
  color: white;
  /* flex: 1; */
}

.prev-btn {
  background: var(--border-color);
  color: var(--text-secondary);
}

.form-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px var(--shadow-medium);
}

.next-btn:hover,
.submit-btn:hover {
  background: var(--secondary-color);
}

.prev-btn:hover {
  background: var(--secondary-color);
  color: white;
}

.btn-loader {
  display: none;
  width: 20px;
  height: 20px;
  border: 2px solid transparent;
  border-top: 2px solid currentColor;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.form-btn.loading .btn-text {
  display: none;
}

.form-btn.loading .btn-loader {
  display: inline-block;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* FAQ Section */
.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--surface);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-md);
  box-shadow: 0 5px 15px var(--shadow-light);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: var(--spacing-xl);
  background: none;
  border: none;
  text-align: left;
  font-size: var(--fs-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all var(--transition-base);
}

.faq-question:hover {
  background: var(--background-secondary);
}

.faq-question i {
  transition: transform var(--transition-base);
}

.faq-question[aria-expanded="true"] i {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base);
}

.faq-answer.active {
  max-height: 200px;
}

.faq-answer p {
  padding: 0 var(--spacing-xl) var(--spacing-xl);
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Contact Section */
.contact-content {
  display: grid;
  gap: var(--spacing-3xl);
  margin-bottom: var(--spacing-3xl);
}

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

.directions-container h3 {
  text-align: center;
  font-size: var(--fs-2xl);
  color: var(--primary-color);
  margin-bottom: var(--spacing-2xl);
  position: relative;
}

.directions-container h3::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  width: 60px;
  height: 3px;
  background: var(--secondary-color);
  transform: translateX(-50%);
}

.directions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

.direction-card {
  background: var(--surface);
  padding: var(--spacing-xl);
  border-radius: var(--radius-xl);
  box-shadow: 0 10px 30px var(--shadow-light);
  transition: all var(--transition-base);
  border-left: 4px solid var(--primary-color);
  position: relative;
  overflow: hidden;
}

.direction-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.direction-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px var(--shadow-medium);
}

.direction-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--fs-xl);
  margin-bottom: var(--spacing-lg);
  transition: transform var(--transition-base);
}

.direction-card:hover .direction-icon {
  transform: scale(1.1) rotate(5deg);
}

.direction-card h4 {
  font-size: var(--fs-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
  line-height: 1.4;
}

.direction-card p {
  color: var(--text-secondary);
  line-height: 1.6;
  font-size: var(--fs-base);
}

.contact-info {
  display: grid;
  gap: var(--spacing-xl);
}

.contact-item {
  display: flex;
  gap: var(--spacing-lg);
  align-items: flex-start;
}

.contact-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--fs-lg);
  flex-shrink: 0;
}

.contact-details h3 {
  font-size: var(--fs-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--primary-color);
  margin-bottom: var(--spacing-xs);
}

.contact-details p {
  color: var(--text-secondary);
  line-height: 1.6;
}

.contact-form-container {
  background: var(--surface);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-xl);
  box-shadow: 0 10px 30px var(--shadow-light);
}

.map-container {
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 10px 30px var(--shadow-light);
}

.map-container iframe {
  width: 100%;
  height: 400px;
  border: none;
}

/* Footer */
.footer {
  background: var(--background-dark);
  color: white;
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

[data-theme="dark"] .footer {
  background: #0d0d0d;
}

.footer-content {
  display: grid;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-section h3,
.footer-section h4 {
  color: #e2e8f0;
  margin-bottom: var(--spacing-lg);
}

.footer-section p {
  color: #e2e8f0;
  line-height: 1.6;
  margin-bottom: var(--spacing-lg);
}

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

.footer-section ul li {
  margin-bottom: var(--spacing-sm);
  color: #e2e8f0;
}

.footer-section ul li i {
  color: #f1f5f9;
  margin-right: var(--spacing-sm);
  width: 16px;
}

.footer-section ul li a {
  color: #e2e8f0;
  text-decoration: none;
  transition: color var(--transition-base);
}

.footer-section ul li a:hover {
  color: var(--primary-color);
}

.social-links {
  display: flex;
  gap: var(--spacing-md);
}

.social-links a {
  width: 40px;
  height: 40px;
  background: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  text-decoration: none;
  transition: all var(--transition-base);
}

.social-links a:hover {
  background: var(--secondary-color);
  transform: translateY(-3px);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-xl);
  border-top: 1px solid #404040;
  color: #cbd5e1;
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: var(--spacing-xl);
  right: var(--spacing-xl);
  width: 50px;
  height: 50px;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  z-index: var(--z-fixed);
}

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

.back-to-top:hover {
  background: var(--secondary-color);
  transform: translateY(-3px);
}

/* Toast Notification */
.toast {
  position: fixed;
  top: var(--spacing-xl);
  right: var(--spacing-xl);
  background: var(--surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: 0 10px 30px var(--shadow-medium);
  z-index: var(--z-tooltip);
  transform: translateX(400px);
  transition: transform var(--transition-base);
  max-width: 350px;
}

.toast.show {
  transform: translateX(0);
}

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

.toast-icon {
  font-size: var(--fs-lg);
  color: var(--primary-color);
}

.toast-message {
  flex: 1;
  color: var(--text-primary);
}

.toast-close {
  background: none;
  border: none;
  color: var(--text-light);
  cursor: pointer;
  padding: var(--spacing-xs);
}

/* Modal */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: var(--z-modal);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.modal.active {
  opacity: 1;
  visibility: visible;
}

.modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  cursor: pointer;
}

.modal-content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.8);
  background: var(--surface);
  border-radius: var(--radius-xl);
  max-width: 600px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  transition: transform var(--transition-base);
}

.modal.active .modal-content {
  transform: translate(-50%, -50%) scale(1);
}

.modal-close {
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  background: none;
  border: none;
  font-size: var(--fs-lg);
  color: var(--text-light);
  cursor: pointer;
  z-index: 1;
}

.modal-body {
  padding: var(--spacing-2xl);
}

.speaker-modal-image {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.speaker-modal-image img {
  width: 200px;
  height: 200px;
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid var(--primary-color);
}

.speaker-modal-info h2 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
  text-align: center;
}

.speaker-modal-info p {
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

/* Accessibility Widget */
.accessibility-widget {
  position: fixed;
  bottom: var(--spacing-xl);
  left: var(--spacing-xl);
  z-index: var(--z-fixed);
}

.accessibility-toggle {
  width: 50px;
  height: 50px;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: var(--fs-lg);
  transition: all var(--transition-base);
}

.accessibility-toggle:hover {
  background: var(--secondary-color);
  transform: scale(1.1);
}

.accessibility-menu {
  position: absolute;
  bottom: 60px;
  left: 0;
  background: var(--surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  box-shadow: 0 10px 30px var(--shadow-medium);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-base);
  min-width: 200px;
}

.accessibility-widget:hover .accessibility-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.accessibility-option {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background: none;
  border: none;
  text-align: left;
  color: var(--text-primary);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: background var(--transition-base);
}

.accessibility-option:hover {
  background: var(--background-secondary);
}

/* Live Notification */
.live-notification {
  position: fixed;
  bottom: 120px;
  right: var(--spacing-xl);
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-xl);
  box-shadow: 0 10px 30px var(--shadow-medium);
  z-index: var(--z-fixed);
  animation: slideInRight 0.5s ease, pulse 2s infinite 3s;
}

.notification-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

@keyframes slideInRight {
  from {
    transform: translateX(400px);
  }
  to {
    transform: translateX(0);
  }
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

/* Responsive Design */
@media (min-width: 768px) {
  .nav-link {
    font-size: var(--fs-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
  }
}

@media (min-width: 1024px) {
  .nav-menu {
    display: flex;
  }
  
  .mobile-menu-toggle {
    display: none;
  }
  
  .nav-link {
    font-size: var(--fs-sm);
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  .hero-title {
    font-size: var(--fs-6xl);
  }
  
  .about-content {
    grid-template-columns: 1fr 1fr;
  }
  
  .about-cards {
    grid-template-columns: 1fr;
  }
  
  .speakers-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .contact-content {
    grid-template-columns: 1fr 1fr;
  }
  
  .directions-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-content {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .about-cards {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .speakers-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .directions-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1200px) {
  .container {
    padding: 0 var(--spacing-lg);
  }
}

/* High Contrast Mode */
.high-contrast {
  --text-primary: #000000;
  --text-secondary: #000000;
  --background-primary: #ffffff;
  --background-secondary: #ffffff;
  --surface: #ffffff;
  --border-color: #000000;
  --primary-color: #000000;
  --secondary-color: #000000;
}

.high-contrast * {
  border-color: #000000 !important;
  box-shadow: none !important;
}

/* Font Size Adjustments */
.font-large {
  font-size: 1.2em;
}

.font-larger {
  font-size: 1.4em;
}

/* Print Styles */
@media print {
  .navbar,
  .back-to-top,
  .accessibility-widget,
  .live-notification,
  .toast {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .hero {
    height: auto;
    background: none;
  }
  
  .hero-content {
    color: black;
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .scroll-indicator {
    animation: none;
  }
}