@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

:root {
  /* AWS Orange */
  --aws-orange: #FF9900;
  --aws-orange-dark: #EC7211;
  --aws-orange-light: #FFB84D;

  /* Dark Theme Colors */
  --bg-primary: #0a0e14;
  --bg-secondary: #0f1419;
  --bg-tertiary: #151a21;
  --bg-card: #1a1f28;
  --bg-card-hover: #1f2530;

  /* AWS Squid Ink */
  --squid-ink: #232F3E;
  --squid-light: #37475A;

  /* Text Colors */
  --text-primary: #E6EDF3;
  --text-secondary: #8B949E;
  --text-tertiary: #6E7681;

  /* Borders & Dividers */
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.12);
  --border-bright: rgba(255, 153, 0, 0.3);

  /* Gradients */
  --gradient-orange: linear-gradient(135deg, #FF9900 0%, #EC7211 100%);
  --gradient-dark: linear-gradient(135deg, #0a0e14 0%, #1a1f28 100%);
  --gradient-card: linear-gradient(145deg, rgba(26, 31, 40, 0.8) 0%, rgba(15, 20, 25, 0.9) 100%);

  /* Shadows & Glows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.6);
  --glow-orange: 0 0 20px rgba(255, 153, 0, 0.15), 0 0 40px rgba(255, 153, 0, 0.08);
  --glow-orange-strong: 0 0 30px rgba(255, 153, 0, 0.3), 0 0 60px rgba(255, 153, 0, 0.15);

  /* Spacing */
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 32px;
  --space-xl: 48px;
  --space-2xl: 64px;
  --space-3xl: 96px;

  /* Transitions */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Enhanced Background Effects */
.blob_section {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
}

.green_blob {
  position: absolute;
  top: 10%;
  right: -10%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(255, 153, 0, 0.12) 0%, rgba(255, 153, 0, 0.04) 40%, transparent 70%);
  filter: blur(80px);
  animation: float 25s ease-in-out infinite;
}

.green_blob2 {
  position: absolute;
  bottom: 10%;
  left: -10%;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(35, 47, 62, 0.4) 0%, rgba(255, 153, 0, 0.08) 40%, transparent 70%);
  filter: blur(80px);
  animation: float 30s ease-in-out infinite reverse;
}

@keyframes float {

  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }

  33% {
    transform: translate(40px, -40px) scale(1.08);
  }

  66% {
    transform: translate(-30px, 30px) scale(0.95);
  }
}

/* Navigation */
header {
  background: rgba(10, 14, 20, 0.9);
  backdrop-filter: blur(24px) saturate(160%);
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-md);
}

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

nav h1 {
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--gradient-orange);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

nav h1 a {
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
}

.aws-logo {
  font-size: 1.75rem;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--space-lg);
}

.nav-links li a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
  transition: var(--transition-fast);
  position: relative;
  padding: 8px 0;
}

.nav-links li a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-orange);
  transition: var(--transition-base);
}

.nav-links li a:hover {
  color: var(--aws-orange);
}

.nav-links li a:hover::after {
  width: 100%;
}

.auth-links {
  display: flex;
  list-style: none;
}

/* Buttons */
button,
.btn {
  padding: 12px 28px;
  border: none;
  border-radius: 8px;
  background: var(--gradient-orange);
  color: #000;
  font-weight: 700;
  font-size: 0.9375rem;
  cursor: pointer;
  transition: var(--transition-base);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

button::before,
.btn::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 0.6s, height 0.6s;
}

button:hover::before,
.btn:hover::before {
  width: 400px;
  height: 400px;
}

button:hover,
.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--glow-orange-strong);
}

/* Hero Section */
.hero_section {
  padding: var(--space-3xl) 0;
  position: relative;
  overflow: hidden;
}

.hero-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-md);
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-2xl);
  align-items: center;
}

.hero-text {
  max-width: 650px;
}

.event-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  background: rgba(255, 153, 0, 0.12);
  border: 1px solid rgba(255, 153, 0, 0.3);
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--aws-orange);
  margin-bottom: var(--space-md);
  animation: pulse-badge 3s ease-in-out infinite;
}

@keyframes pulse-badge {

  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(255, 153, 0, 0.4);
  }

  50% {
    box-shadow: 0 0 20px 8px rgba(255, 153, 0, 0.1);
  }
}

.hero-text h1 {
  font-size: clamp(3rem, 6vw, 5rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: var(--space-sm);
  letter-spacing: -0.03em;
}

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

.hero-subtitle {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

.hero-description {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
}

.hero-cta {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
}

.explore-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 32px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  transition: var(--transition-base);
}

.explore-btn.primary {
  background: var(--gradient-orange);
  color: #000;
  box-shadow: var(--glow-orange);
}

.explore-btn.primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--glow-orange-strong);
}

.explore-btn.secondary {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--border-medium);
}

.explore-btn.secondary:hover {
  border-color: var(--aws-orange);
  background: rgba(255, 153, 0, 0.1);
}

.event-stats {
  display: flex;
  gap: var(--space-xl);
}

.stat {
  text-align: left;
}

.stat-number {
  display: block;
  font-size: 3rem;
  font-weight: 800;
  background: var(--gradient-orange);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

/* Hero Services Grid */
.hero-image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.aws-services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
  max-width: 450px;
}

.service-icon {
  background: var(--gradient-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: var(--space-md) var(--space-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}

.service-icon::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at center, rgba(255, 153, 0, 0.1), transparent 70%);
  opacity: 0;
  transition: var(--transition-base);
}

.service-icon:hover::before {
  opacity: 1;
}

.service-icon:hover {
  transform: translateY(-6px);
  border-color: var(--border-bright);
  box-shadow: var(--glow-orange);
}

.service-icon i {
  font-size: 2.25rem;
  color: var(--aws-orange);
  filter: drop-shadow(0 4px 8px rgba(255, 153, 0, 0.4));
}

.service-icon span {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-primary);
}

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

.section-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(255, 153, 0, 0.12);
  border: 1px solid rgba(255, 153, 0, 0.25);
  border-radius: 50px;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--aws-orange);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-sm);
}

.section-header h2 {
  font-size: clamp(2.25rem, 4vw, 3rem);
  font-weight: 800;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
  line-height: 1.2;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* About Section */
.aboutus {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.about-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.about-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.about-header h1 {
  font-size: clamp(2.25rem, 4vw, 3rem);
  font-weight: 800;
  margin-bottom: var(--space-sm);
}

.aboutus-text {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--text-secondary);
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--space-2xl);
}

.about-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-md);
}

.about-feature {
  background: var(--gradient-card);
  backdrop-filter: blur(12px);
  padding: var(--space-xl);
  border-radius: 16px;
  border: 1px solid var(--border-subtle);
  text-align: center;
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}

.about-feature::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at top, rgba(255, 153, 0, 0.08), transparent 60%);
  opacity: 0;
  transition: var(--transition-base);
}

.about-feature:hover::before {
  opacity: 1;
}

.about-feature:hover {
  transform: translateY(-6px);
  border-color: var(--border-bright);
  box-shadow: var(--glow-orange);
}

.about-feature i {
  font-size: 3rem;
  color: var(--aws-orange);
  margin-bottom: var(--space-sm);
  filter: drop-shadow(0 4px 12px rgba(255, 153, 0, 0.4));
}

.about-feature h3 {
  font-size: 1.375rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
  color: var(--text-primary);
}

.about-feature p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Sessions Section - COMPACT VERTICAL DESIGN */
.sessions {
  background: var(--bg-primary);
  position: relative;
}

.container-narrow {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.sessions-timeline {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-md);
  position: relative;
}

/* Vertical Session Card Design */
.session-card {
  background: linear-gradient(145deg, rgba(26, 31, 40, 0.6) 0%, rgba(15, 20, 25, 0.8) 100%);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 0;
  transition: var(--transition-slow);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
}

/* Animated gradient border effect */
.session-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 2px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--aws-orange), #EC7211, var(--aws-orange-light));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: var(--transition-slow);
}

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

.session-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--glow-orange-strong), var(--shadow-lg);
}

/* Top - Session number with gradient */
.session-number {
  background: linear-gradient(135deg, rgba(255, 153, 0, 0.15) 0%, rgba(255, 153, 0, 0.05) 100%);
  border-bottom: 2px solid var(--border-bright);
  padding: var(--space-md);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  height: 80px;
}

.session-number::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: conic-gradient(from 180deg at 50% 50%, transparent, rgba(255, 153, 0, 0.25), transparent);
  animation: rotate-gradient 8s linear infinite;
  opacity: 0;
}

.session-card:hover .session-number::before {
  opacity: 1;
}

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

.session-number {
  font-size: 3rem;
  font-weight: 900;
  background: var(--gradient-orange);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

/* Content */
.session-content {
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  flex-grow: 1;
}

.session-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-bottom: var(--space-xs);
}

.session-badge {
  padding: 5px 12px;
  background: rgba(255, 153, 0, 0.15);
  border: 1px solid rgba(255, 153, 0, 0.3);
  border-radius: 20px;
  font-size: 0.6875rem;
  font-weight: 800;
  color: var(--aws-orange);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.session-badge.demo {
  background: rgba(20, 110, 180, 0.15);
  border-color: rgba(20, 110, 180, 0.3);
  color: #4A9EDA;
}

.session-badge.advanced {
  background: rgba(26, 132, 114, 0.15);
  border-color: rgba(26, 132, 114, 0.3);
  color: #26E5B8;
}

.session-time {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  font-weight: 600;
}

.session-time i {
  color: var(--aws-orange);
}

.session-content h3 {
  font-size: 1.375rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.session-description {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}

.session-topics {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: var(--space-sm);
}

.topic-tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 12px;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: var(--transition-fast);
}

.topic-tag:hover {
  background: rgba(255, 153, 0, 0.1);
  border-color: var(--border-bright);
  color: var(--aws-orange);
  transform: translateY(-2px);
}

.topic-tag i {
  color: var(--aws-orange);
  font-size: 0.8125rem;
}

.topic-tag.highlight {
  background: rgba(255, 153, 0, 0.15);
  border-color: rgba(255, 153, 0, 0.3);
  color: var(--aws-orange);
}

.session-speaker {
  display: flex;
  align-items: center;
  padding-top: var(--space-sm);
  border-top: 1px solid var(--border-subtle);
  margin-top: auto;
}

.speaker-mini {
  display: flex;
  align-items: center;
  gap: 10px;
}

.speaker-avatar-mini {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--gradient-orange);
  box-shadow: 0 0 16px rgba(255, 153, 0, 0.4);
  border: 2px solid rgba(255, 153, 0, 0.3);
  object-fit: cover;
  object-position: center center;
}

.speaker-mini span {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* Speakers Section */
.speakers {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
}

.speakers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-lg);
}

.speaker-card {
  background: var(--gradient-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  overflow: hidden;
  transition: var(--transition-base);
  box-shadow: var(--shadow-md);
}

.speaker-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-bright);
  box-shadow: var(--glow-orange);
}

.speaker-image {
  position: relative;
  width: 100%;
  padding-bottom: 100%;
  /* Creates 1:1 aspect ratio */
  background: linear-gradient(135deg, var(--squid-ink) 0%, var(--squid-light) 100%);
}

.speaker-placeholder {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: rgba(255, 153, 0, 0.15);
  border: 3px solid var(--aws-orange);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--glow-orange);
}

.speaker-placeholder i {
  font-size: 4rem;
  color: var(--aws-orange);
}

.speaker-photo {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  transition: var(--transition-base);
}

.speaker-card:hover .speaker-photo {
  transform: scale(1.05);
}

.speaker-social {
  position: absolute;
  bottom: -22px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
}

.speaker-social a {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border-medium);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.speaker-social a:hover {
  background: var(--aws-orange);
  color: #000;
  border-color: var(--aws-orange);
  transform: translateY(-3px);
  box-shadow: var(--glow-orange);
}

.speaker-info {
  padding: var(--space-xl) var(--space-md) var(--space-md);
  text-align: center;
}

.speaker-info h3 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 4px;
  color: var(--text-primary);
}

.speaker-title {
  font-size: 1rem;
  color: var(--aws-orange);
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.speaker-sessions {
  display: flex;
  justify-content: center;
}

.speaker-sessions span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: rgba(255, 153, 0, 0.12);
  border: 1px solid rgba(255, 153, 0, 0.25);
  border-radius: 20px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
}

/* Register Section */
.register {
  background: linear-gradient(135deg, #1a1f28 0%, #0f1419 100%);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  position: relative;
  overflow: hidden;
}

.register::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at top right, rgba(255, 153, 0, 0.1), transparent 60%);
  pointer-events: none;
}

.register-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: var(--space-3xl) var(--space-md);
  text-align: center;
  position: relative;
  z-index: 1;
}

.register-content h2 {
  font-size: clamp(2.25rem, 4vw, 3rem);
  font-weight: 800;
  margin-bottom: var(--space-sm);
}

.register-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
  line-height: 1.7;
}

.register-benefits {
  list-style: none;
  margin-bottom: 0;
  display: block;
  text-align: left;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.register-benefits li {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 0;
  font-size: 1.0625rem;
  color: var(--text-secondary);
}

.register-benefits li i {
  color: var(--aws-orange);
  font-size: 1.25rem;
}

.register-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  width: fit-content;
  margin-left: auto;
  margin-right: auto;
  padding: 18px 48px;
  background: var(--gradient-orange);
  border: none;
  border-radius: 10px;
  font-size: 1.25rem;
  font-weight: 800;
  color: #000;
  text-decoration: none;
  transition: var(--transition-base);
  box-shadow: var(--glow-orange);
  margin-top: var(--space-xl);
  text-align: center;
}

.register-btn:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: var(--glow-orange-strong);
}

.register-note {
  margin-top: var(--space-md);
  font-size: 0.9375rem;
  color: var(--text-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

/* Contact Section */
.contact_us {
  background: var(--bg-secondary);
  padding: var(--space-2xl) 0;
}

.contact-us-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--space-md);
  text-align: center;
}

.contact-us-content h1 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 800;
  margin-bottom: var(--space-sm);
}

.download-p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
}

.contact-methods {
  display: flex;
  justify-content: center;
}

.contact-email {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 32px;
  background: rgba(255, 153, 0, 0.1);
  border: 2px solid var(--border-bright);
  border-radius: 10px;
  text-decoration: none;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--aws-orange);
  transition: var(--transition-base);
}

.contact-email:hover {
  background: var(--aws-orange);
  color: #000;
  transform: translateY(-3px);
  box-shadow: var(--glow-orange);
}

/* Footer - Modern Design */
footer {
  background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--squid-ink) 100%);
  border-top: 1px solid var(--border-medium);
  padding: var(--space-3xl) 0 0;
  position: relative;
}

footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--aws-orange), transparent);
  opacity: 0.5;
}

.footer {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-md) var(--space-2xl);
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
}

.footer-left {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-left h1 {
  font-size: 1.75rem;
  font-weight: 900;
  margin-bottom: var(--space-xs);
  background: var(--gradient-orange);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: flex;
  align-items: center;
  gap: 12px;
  line-height: 1.2;
}

.footer-left p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: var(--space-sm);
  max-width: 350px;
}

.footer-social {
  display: flex;
  gap: 10px;
  margin-top: var(--space-sm);
}

.footer-social a {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 1.125rem;
  text-decoration: none;
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}

.footer-social a::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: var(--aws-orange);
  transform: translate(-50%, -50%);
  transition: width 0.4s, height 0.4s;
}

.footer-social a i {
  position: relative;
  z-index: 1;
}

.footer-social a:hover::before {
  width: 120%;
  height: 120%;
}

.footer-social a:hover {
  color: #000;
  border-color: var(--aws-orange);
  transform: translateY(-3px);
  box-shadow: var(--glow-orange);
}

.column {
  display: flex;
  flex-direction: column;
}

.column h2 {
  font-size: 0.9375rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  position: relative;
  padding-bottom: 12px;
}

.column h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--gradient-orange);
}

.column a {
  color: var(--text-secondary);
  text-decoration: none;
  margin-bottom: 12px;
  font-size: 0.9375rem;
  transition: var(--transition-fast);
  position: relative;
  padding-left: 0;
  display: inline-block;
}

.column a::before {
  content: '→';
  position: absolute;
  left: -20px;
  opacity: 0;
  transition: var(--transition-fast);
  color: var(--aws-orange);
}

.column a:hover {
  color: var(--aws-orange);
  padding-left: 20px;
}

.column a:hover::before {
  opacity: 1;
  left: 0;
}

.reserved {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--space-lg) var(--space-md);
  border-top: 1px solid var(--border-subtle);
  text-align: center;
  background: rgba(0, 0, 0, 0.2);
}

.reserved p {
  font-size: 0.875rem;
  color: var(--text-tertiary);
  margin: 0;
  line-height: 1.6;
}

.aws-disclaimer {
  font-size: 0.75rem !important;
  margin-top: 8px !important;
  opacity: 0.6;
}

/* Mobile Menu */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  box-shadow: none;
}

.mobile-menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition-base);
}

.mobile-menu-toggle:hover span {
  background: var(--aws-orange);
}

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

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

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

/* Responsive Design */
@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    text-align: center;
  }

  .hero-text {
    max-width: 100%;
  }

  .hero-cta,
  .event-stats {
    justify-content: center;
  }

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

  .sessions-timeline {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  }
}

@media (max-width: 768px) {
  :root {
    --space-3xl: 64px;
  }

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

  nav {
    flex-wrap: wrap;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(10, 14, 20, 0.98);
    backdrop-filter: blur(24px);
    padding: var(--space-sm);
    gap: 0;
    border-bottom: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-md);
  }

  .nav-links.active {
    display: flex;
  }

  .nav-links li {
    width: 100%;
  }

  .nav-links li a {
    display: block;
    padding: var(--space-sm);
    border-bottom: 1px solid var(--border-subtle);
  }

  .aws-services-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
  }

  .service-icon {
    padding: var(--space-sm);
  }

  .service-icon i {
    font-size: 1.75rem;
  }

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

  .footer {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-left {
    align-items: center;
  }

  .footer-social {
    justify-content: center;
  }

  .column {
    align-items: center;
  }
}

@media (max-width: 480px) {
  .hero-text h1 {
    font-size: 2.5rem;
  }

  .session-content h3 {
    font-size: 1.375rem;
  }

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

  .explore-btn {
    width: 100%;
    justify-content: center;
  }
}