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

/* ===== CSS VARIABLES ===== */
:root {
  --bg-primary: #020817;
  --bg-secondary: #0a0f1e;
  --bg-card: #0d1630;
  --bg-card-hover: #111c3a;
  --neon-blue: #00d4ff;
  --neon-purple: #a855f7;
  --neon-pink: #f472b6;
  --neon-green: #22d3ee;
  --accent-primary: #6366f1;
  --accent-secondary: #8b5cf6;
  --text-primary: #f0f4ff;
  --text-secondary: #94a3b8;
  --text-muted: #475569;
  --border-color: rgba(99, 102, 241, 0.2);
  --border-glow: rgba(0, 212, 255, 0.3);
  --gradient-1: linear-gradient(135deg, #6366f1, #a855f7);
  --gradient-2: linear-gradient(135deg, #00d4ff, #6366f1);
  --gradient-3: linear-gradient(135deg, #a855f7, #f472b6);
  --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.3);
  --shadow-neon: 0 0 20px rgba(0, 212, 255, 0.4);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --font-heading: 'Orbitron', monospace;
  --font-body: 'Space Grotesk', sans-serif;
  --font-ui: 'Inter', sans-serif;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== RESET & BASE ===== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

ul {
  list-style: none;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--accent-primary);
  border-radius: 3px;
}

/* ===== SECTION BASE ===== */
section {
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid var(--border-color);
  color: var(--neon-blue);
  padding: 6px 16px;
  border-radius: 100px;
  font-family: var(--font-ui);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.section-tag::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--neon-blue);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #fff 40%, var(--neon-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 600px;
  line-height: 1.7;
}

.text-center {
  text-align: center;
}

.text-center .section-subtitle {
  margin: 0 auto;
}

/* ===== ANIMATIONS ===== */
@keyframes pulse {

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

  50% {
    opacity: 0.5;
    transform: scale(1.4)
  }
}

@keyframes float {

  0%,
  100% {
    transform: translateY(0)
  }

  50% {
    transform: translateY(-12px)
  }
}

@keyframes glow {

  0%,
  100% {
    text-shadow: 0 0 20px rgba(0, 212, 255, 0.5)
  }

  50% {
    text-shadow: 0 0 40px rgba(0, 212, 255, 0.9), 0 0 80px rgba(99, 102, 241, 0.5)
  }
}

@keyframes rotate {
  from {
    transform: rotate(0deg)
  }

  to {
    transform: rotate(360deg)
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-40px)
  }

  to {
    opacity: 1;
    transform: translateX(0)
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(40px)
  }

  to {
    opacity: 1;
    transform: translateX(0)
  }
}

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

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

@keyframes shimmer {
  0% {
    background-position: -200% center
  }

  100% {
    background-position: 200% center
  }
}

@keyframes borderGlow {

  0%,
  100% {
    border-color: rgba(0, 212, 255, 0.3)
  }

  50% {
    border-color: rgba(168, 85, 247, 0.6)
  }
}

@keyframes countBlink {

  0%,
  100% {
    opacity: 1
  }

  50% {
    opacity: 0.4
  }
}

@keyframes particleFloat {
  0% {
    transform: translateY(100vh) rotate(0deg);
    opacity: 0
  }

  10% {
    opacity: 1
  }

  90% {
    opacity: 1
  }

  100% {
    transform: translateY(-10vh) rotate(720deg);
    opacity: 0
  }
}

/* Scroll Reveal */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* ===== NAVBAR ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(2, 8, 23, 0.92);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 4px 40px rgba(0, 0, 0, 0.5);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-logo-icon {
  width: 42px;
  height: 42px;
  background: var(--gradient-1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 800;
  color: white;
  box-shadow: var(--shadow-glow);
}

.nav-logo-text {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.nav-logo-text span {
  color: var(--neon-blue);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links a {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-family: var(--font-ui);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
  position: relative;
}

.nav-links a:hover {
  color: var(--text-primary);
  background: rgba(99, 102, 241, 0.1);
}

.nav-cta {
  background: var(--gradient-1);
  color: white !important;
  padding: 8px 20px !important;
  border-radius: var(--radius-sm);
  font-weight: 600 !important;
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.4);
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(99, 102, 241, 0.6) !important;
  background: rgba(0, 0, 0, 0) !important;
  background: var(--gradient-1) !important;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}

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

.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background: rgba(2, 8, 23, 0.97);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 24px;
  z-index: 999;
  flex-direction: column;
  gap: 4px;
}

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

.mobile-menu a {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-family: var(--font-ui);
  font-size: 0.9rem;
  transition: var(--transition);
}

.mobile-menu a:hover {
  color: var(--text-primary);
  background: rgba(99, 102, 241, 0.1);
}

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  background: var(--bg-primary);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('assets/images/hero_bg.png');
  background-size: cover;
  background-position: center;
  opacity: 0.25;
  z-index: 0;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: radial-gradient(ellipse at 30% 50%, rgba(99, 102, 241, 0.15) 0%, transparent 60%),
    radial-gradient(ellipse at 70% 20%, rgba(168, 85, 247, 0.1) 0%, transparent 50%),
    linear-gradient(to bottom, transparent 60%, var(--bg-primary) 100%);
}

.hero-grid {
  position: absolute;
  inset: 0;
  z-index: 1;
  background-image: linear-gradient(rgba(99, 102, 241, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99, 102, 241, 0.06) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero-particles {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--neon-blue);
  animation: particleFloat linear infinite;
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: 120px 0 80px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid rgba(0, 212, 255, 0.25);
  padding: 8px 20px;
  border-radius: 100px;
  margin-bottom: 28px;
  animation: borderGlow 3s ease infinite;
}

.hero-eyebrow-dot {
  width: 8px;
  height: 8px;
  background: var(--neon-blue);
  border-radius: 50%;
  animation: pulse 1.5s infinite;
}

.hero-eyebrow span {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--neon-blue);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 7vw, 5.5rem);
  font-weight: 900;
  line-height: 1.05;
  margin-bottom: 12px;
  animation: glow 4s ease infinite;
}

.hero-title .line1 {
  display: block;
  color: #fff;
}

.hero-title .line2 {
  display: block;
  background: linear-gradient(135deg, var(--neon-blue) 0%, var(--neon-purple) 50%, var(--neon-pink) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  background-size: 200% auto;
  animation: shimmer 4s linear infinite;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 620px;
  margin-bottom: 36px;
  line-height: 1.8;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-bottom: 40px;
}

.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 10px;
}

.hero-meta-icon {
  width: 36px;
  height: 36px;
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.hero-meta-text {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.hero-meta-text strong {
  display: block;
  color: var(--text-primary);
  font-weight: 600;
}

/* COUNTDOWN */
.countdown {
  display: flex;
  gap: 16px;
  margin-bottom: 44px;
}

.countdown-item {
  text-align: center;
}

.countdown-box {
  width: 80px;
  height: 70px;
  background: rgba(13, 22, 48, 0.8);
  border: 1px solid rgba(0, 212, 255, 0.25);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--neon-blue);
  backdrop-filter: blur(10px);
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.05);
  transition: var(--transition);
}

.countdown-box:hover {
  border-color: rgba(0, 212, 255, 0.5);
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
}

.countdown-label {
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: 6px;
  font-family: var(--font-ui);
}

.countdown-sep {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  color: var(--neon-purple);
  padding-top: 6px;
  animation: countBlink 1s infinite;
}

/* HERO BUTTONS */
.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--gradient-1);
  color: white;
  padding: 14px 32px;
  border-radius: var(--radius-md);
  font-family: var(--font-ui);
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 0 30px rgba(99, 102, 241, 0.4), 0 4px 15px rgba(0, 0, 0, 0.3);
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.15), transparent);
  opacity: 0;
  transition: var(--transition);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 0 50px rgba(99, 102, 241, 0.6), 0 8px 25px rgba(0, 0, 0, 0.4);
}

.btn-primary:hover::before {
  opacity: 1;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: transparent;
  color: var(--text-primary);
  padding: 14px 32px;
  border-radius: var(--radius-md);
  font-family: var(--font-ui);
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid rgba(99, 102, 241, 0.4);
  cursor: pointer;
  transition: var(--transition);
}

.btn-secondary:hover {
  background: rgba(99, 102, 241, 0.1);
  border-color: rgba(99, 102, 241, 0.7);
  transform: translateY(-3px);
  box-shadow: 0 0 30px rgba(99, 102, 241, 0.2);
}

/* HERO FLOATING CARD */
.hero-floating-card {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 340px;
  background: rgba(13, 22, 48, 0.7);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-glow);
  animation: float 6s ease infinite;
  z-index: 2;
}

.hfc-title {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  color: var(--neon-blue);
  letter-spacing: 0.1em;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.hfc-title::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--neon-blue);
  border-radius: 50%;
  animation: pulse 1.5s infinite;
}

.hfc-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 20px;
}

.hfc-stat {
  text-align: center;
  padding: 16px;
  background: rgba(99, 102, 241, 0.08);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(99, 102, 241, 0.15);
}

.hfc-stat-num {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 800;
  background: var(--gradient-2);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hfc-stat-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 4px;
}

.hfc-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.hfc-tag {
  padding: 5px 12px;
  border-radius: 100px;
  font-size: 0.72rem;
  font-weight: 600;
  font-family: var(--font-ui);
}

.hfc-tag.blue {
  background: rgba(0, 212, 255, 0.1);
  color: var(--neon-blue);
  border: 1px solid rgba(0, 212, 255, 0.2);
}

.hfc-tag.purple {
  background: rgba(168, 85, 247, 0.1);
  color: var(--neon-purple);
  border: 1px solid rgba(168, 85, 247, 0.2);
}

.hfc-tag.pink {
  background: rgba(244, 114, 182, 0.1);
  color: var(--neon-pink);
  border: 1px solid rgba(244, 114, 182, 0.2);
}

.hfc-tag.green {
  background: rgba(34, 211, 238, 0.1);
  color: var(--neon-green);
  border: 1px solid rgba(34, 211, 238, 0.2);
}

/* ===== ABOUT ===== */
.about {
  background: var(--bg-secondary);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-points {
  margin-top: 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.about-point {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px;
  background: rgba(13, 22, 48, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.about-point:hover {
  border-color: var(--border-glow);
  background: var(--bg-card-hover);
  transform: translateX(4px);
}

.about-point-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.about-point-icon.blue {
  background: rgba(0, 212, 255, 0.12);
}

.about-point-icon.purple {
  background: rgba(168, 85, 247, 0.12);
}

.about-point-icon.pink {
  background: rgba(244, 114, 182, 0.12);
}

.about-point-icon.green {
  background: rgba(34, 211, 238, 0.12);
}

.about-point-text h4 {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.about-point-text p {
  font-size: 0.83rem;
  color: var(--text-secondary);
}

.about-visual {
  position: relative;
}

.about-visual-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 36px;
  position: relative;
  overflow: hidden;
}

.about-visual-card::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -60px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.2) 0%, transparent 70%);
}

.about-visual-card::after {
  content: '';
  position: absolute;
  bottom: -40px;
  left: -40px;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.15) 0%, transparent 70%);
}

.about-tech-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  position: relative;
  z-index: 1;
}

.about-tech-item {
  padding: 20px 16px;
  background: rgba(99, 102, 241, 0.06);
  border: 1px solid rgba(99, 102, 241, 0.15);
  border-radius: var(--radius-md);
  text-align: center;
  transition: var(--transition);
}

.about-tech-item:hover {
  background: rgba(99, 102, 241, 0.12);
  border-color: rgba(99, 102, 241, 0.35);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(99, 102, 241, 0.2);
}

.about-tech-item .icon {
  font-size: 2rem;
  margin-bottom: 10px;
}

.about-tech-item h4 {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
}

.about-center-badge {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 2;
  width: 70px;
  height: 70px;
  background: var(--gradient-1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  box-shadow: 0 0 30px rgba(99, 102, 241, 0.6);
  animation: rotate 10s linear infinite;
}

/* ===== HIGHLIGHTS ===== */
.highlights {
  background: var(--bg-primary);
}

.highlights-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 56px;
}

.highlight-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  cursor: default;
}

.highlight-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-1);
  transform: scaleX(0);
  transition: var(--transition);
}

.highlight-card:hover {
  transform: translateY(-8px);
  border-color: rgba(99, 102, 241, 0.4);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4), 0 0 40px rgba(99, 102, 241, 0.15);
  background: var(--bg-card-hover);
}

.highlight-card:hover::before {
  transform: scaleX(1);
}

.hc-icon {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
}

.hc-icon.ai {
  background: rgba(0, 212, 255, 0.1);
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.15);
}

.hc-icon.robotics {
  background: rgba(168, 85, 247, 0.1);
  box-shadow: 0 0 20px rgba(168, 85, 247, 0.15);
}

.hc-icon.web {
  background: rgba(99, 102, 241, 0.1);
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.15);
}

.hc-icon.game {
  background: rgba(244, 114, 182, 0.1);
  box-shadow: 0 0 20px rgba(244, 114, 182, 0.15);
}

.hc-icon.network {
  background: rgba(34, 211, 238, 0.1);
  box-shadow: 0 0 20px rgba(34, 211, 238, 0.15);
}

.hc-icon.workshop {
  background: rgba(251, 191, 36, 0.1);
  box-shadow: 0 0 20px rgba(251, 191, 36, 0.15);
}

.highlight-card h3 {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.highlight-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.hc-number {
  position: absolute;
  top: 20px;
  right: 24px;
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 900;
  color: rgba(99, 102, 241, 0.06);
  line-height: 1;
}

/* ===== SCHEDULE ===== */
.schedule {
  background: var(--bg-secondary);
}

.schedule-tabs {
  display: flex;
  gap: 8px;
  margin: 40px 0 32px;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 10px 24px;
  border-radius: 100px;
  border: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-ui);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.tab-btn:hover {
  border-color: rgba(99, 102, 241, 0.4);
  color: var(--text-primary);
}

.tab-btn.active {
  background: var(--gradient-1);
  border-color: transparent;
  color: white;
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.4);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeInUp 0.4s ease;
}

.schedule-timeline {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.schedule-item {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 20px;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.schedule-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--gradient-1);
}

.schedule-item:hover {
  border-color: rgba(99, 102, 241, 0.35);
  transform: translateX(4px);
  background: var(--bg-card-hover);
}

.schedule-time {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.schedule-time .time {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  color: var(--neon-blue);
  font-weight: 700;
}

.schedule-time .duration {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.schedule-details h4 {
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
  font-size: 1rem;
}

.schedule-details .speaker-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  color: var(--neon-purple);
  margin-bottom: 8px;
}

.schedule-details .speaker-tag::before {
  content: '👤';
  font-size: 0.7rem;
}

.schedule-details p {
  font-size: 0.83rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.schedule-badge {
  position: absolute;
  right: 20px;
  top: 20px;
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 0.7rem;
  font-weight: 700;
  font-family: var(--font-ui);
}

.schedule-badge.keynote {
  background: rgba(0, 212, 255, 0.1);
  color: var(--neon-blue);
  border: 1px solid rgba(0, 212, 255, 0.25);
}

.schedule-badge.workshop {
  background: rgba(168, 85, 247, 0.1);
  color: var(--neon-purple);
  border: 1px solid rgba(168, 85, 247, 0.25);
}

.schedule-badge.event {
  background: rgba(244, 114, 182, 0.1);
  color: var(--neon-pink);
  border: 1px solid rgba(244, 114, 182, 0.25);
}

.schedule-badge.break {
  background: rgba(34, 211, 238, 0.1);
  color: var(--neon-green);
  border: 1px solid rgba(34, 211, 238, 0.25);
}

/* ===== SPEAKERS ===== */
.speakers {
  background: var(--bg-primary);
  background: radial-gradient(circle at 50% 50%, rgba(99, 102, 241, 0.05) 0%, var(--bg-primary) 70%);
  position: relative;
}

.speakers::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-color), transparent);
}

.speakers-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 56px;
}

.speaker-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.speaker-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.05), transparent);
  opacity: 0;
  transition: var(--transition);
}

.speaker-card:hover {
  transform: translateY(-10px);
  border-color: rgba(99, 102, 241, 0.4);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5), 0 0 40px rgba(99, 102, 241, 0.15);
}

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

.speaker-avatar {
  width: 110px;
  height: 110px;
  border-radius: 50%;
  margin: 0 auto 1.5rem;
  overflow: hidden;
  border: 4px solid rgba(99, 102, 241, 0.4);
  box-shadow: 0 0 30px rgba(99, 102, 241, 0.25), 0 0 60px rgba(0, 212, 255, 0.1);
  position: relative;
  transition: var(--transition);
  background: var(--bg-card-hover);
}

.speaker-card:hover .speaker-avatar {
  border-color: var(--neon-blue);
  box-shadow: 0 0 40px rgba(0, 212, 255, 0.5), 0 0 80px rgba(99, 102, 241, 0.3);
  transform: scale(1.05);
}

.speaker-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.speaker-avatar-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  color: white;
  background: var(--gradient-1);
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.speaker-name {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.speaker-title {
  font-size: 0.78rem;
  color: var(--neon-blue);
  margin-bottom: 4px;
}

.speaker-org {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.speaker-topic {
  background: rgba(99, 102, 241, 0.08);
  border: 1px solid rgba(99, 102, 241, 0.15);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 0.75rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ===== REGISTRATION ===== */
.registration {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(168, 85, 247, 0.05));
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.registration-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.reg-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.25);
  color: #f87171;
  padding: 6px 16px;
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 700;
  margin-bottom: 24px;
  animation: pulse 2s infinite;
}

.reg-price {
  margin: 24px 0;
}

.reg-price .price-amount {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 900;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.reg-price .price-note {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.reg-features {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 28px 0;
}

.reg-feature {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.reg-feature::before {
  content: '✓';
  width: 22px;
  height: 22px;
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: var(--neon-blue);
  flex-shrink: 0;
}

.reg-form-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 36px;
}

.reg-form-card h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
  font-family: var(--font-ui);
}

.form-group input,
.form-group select {
  width: 100%;
  background: rgba(99, 102, 241, 0.06);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  color: var(--text-primary);
  font-family: var(--font-ui);
  font-size: 0.875rem;
  transition: var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group select:focus {
  border-color: rgba(99, 102, 241, 0.5);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group input::placeholder {
  color: var(--text-muted);
}

.form-group select option {
  background: var(--bg-card);
}

/* ===== SPONSORS ===== */
.sponsors {
  background: var(--bg-secondary);
}

.sponsors-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 50px;
}

.sponsor-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  text-align: center;
  transition: var(--transition);
  cursor: default;
}

.sponsor-card:hover {
  border-color: rgba(99, 102, 241, 0.4);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.sponsor-logo {
  width: 60px;
  height: 60px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
}

.sponsor-logo.ieee {
  background: linear-gradient(135deg, #00629b, #003f6b);
}

.sponsor-logo.sb {
  background: linear-gradient(135deg, #1d4ed8, #1e3a8a);
}

.sponsor-logo.cs {
  background: linear-gradient(135deg, #7c3aed, #4c1d95);
}

.sponsor-logo.dept {
  background: linear-gradient(135deg, #0e7490, #164e63);
}

.sponsor-logo.ras {
  background: linear-gradient(135deg, #b45309, #78350f);
}

.sponsor-logo.wie {
  background: linear-gradient(135deg, #be185d, #831843);
}

.sponsor-logo.power {
  background: linear-gradient(135deg, #15803d, #14532d);
}

.sponsor-logo.comp {
  background: linear-gradient(135deg, #c2410c, #7c2d12);
}

.sponsor-name {
  font-size: 0.83rem;
  font-weight: 700;
  color: var(--text-primary);
}

.sponsor-type {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ===== GALLERY ===== */
.gallery {
  background: var(--bg-primary);
}

.gallery-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  grid-template-rows: 220px 220px;
  gap: 16px;
  margin-top: 50px;
}

.gallery-item {
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
  cursor: pointer;
}

.gallery-item:first-child {
  grid-row: 1 / 3;
}

.gallery-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.7), rgba(168, 85, 247, 0.5));
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}

.gallery-item:hover .gallery-overlay {
  opacity: 1;
}

.gallery-overlay .gallery-icon {
  font-size: 2.5rem;
  margin-bottom: 10px;
}

.gallery-overlay .gallery-label {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  color: white;
}

.gallery-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  font-size: 3.5rem;
}

.gallery-placeholder .gallery-title {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.gallery-bg-1 {
  background: linear-gradient(135deg, #0d1630, #1a1060);
}

.gallery-bg-2 {
  background: linear-gradient(135deg, #0d2030, #10314a);
}

.gallery-bg-3 {
  background: linear-gradient(135deg, #1a0d30, #2a1060);
}

.gallery-bg-4 {
  background: linear-gradient(135deg, #0d2030, #05140a);
}

.gallery-bg-5 {
  background: linear-gradient(135deg, #200d30, #400060);
}

/* ===== CONTACT ===== */
.contact {
  background: var(--bg-secondary);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  margin-top: 56px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.contact-item:hover {
  border-color: var(--border-glow);
  transform: translateX(4px);
}

.contact-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.contact-icon.email {
  background: rgba(99, 102, 241, 0.12);
}

.contact-icon.phone {
  background: rgba(0, 212, 255, 0.12);
}

.contact-icon.location {
  background: rgba(168, 85, 247, 0.12);
}

.contact-item-text h4 {
  font-weight: 700;
  margin-bottom: 4px;
}

.contact-item-text p,
.contact-item-text a {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.contact-item-text a:hover {
  color: var(--neon-blue);
}

.map-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.map-placeholder {
  height: 280px;
  background: linear-gradient(135deg, #0d1630, #1a1060);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.map-placeholder .map-icon {
  font-size: 4rem;
}

.map-placeholder h4 {
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--text-primary);
}

.map-placeholder p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.map-footer {
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.map-footer a {
  font-size: 0.83rem;
  color: var(--neon-blue);
  font-weight: 600;
}

.social-links {
  display: flex;
  gap: 12px;
  margin-top: 28px;
}

.social-btn {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: var(--transition);
  cursor: pointer;
  color: var(--text-secondary);
}

.social-btn:hover {
  border-color: rgba(99, 102, 241, 0.5);
  background: rgba(99, 102, 241, 0.1);
  color: var(--text-primary);
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(99, 102, 241, 0.2);
}

/* ===== FOOTER ===== */
footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--border-color);
}

.footer-brand h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.footer-brand h3 span {
  color: var(--neon-blue);
}

.footer-brand p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 260px;
}

.footer-col h4 {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.1em;
  margin-bottom: 20px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col ul li a {
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: var(--transition);
}

.footer-col ul li a:hover {
  color: var(--neon-blue);
  padding-left: 4px;
}

.footer-bottom {
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-bottom-links {
  display: flex;
  gap: 20px;
}

.footer-bottom-links a {
  font-size: 0.8rem;
  color: var(--text-muted);
  transition: var(--transition);
}

.footer-bottom-links a:hover {
  color: var(--text-secondary);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .highlights-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }

  .hero-floating-card {
    display: none;
  }

  .sponsors-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (max-width: 768px) {
  section {
    padding: 70px 0;
  }

  .nav-links {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .about-grid,
  .registration-inner,
  .contact-grid {
    grid-template-columns: 1fr;
  }

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

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

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

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

  .gallery-grid {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto;
  }

  .gallery-item:first-child {
    grid-row: auto;
  }

  .countdown-box {
    width: 62px;
    height: 56px;
    font-size: 1.3rem;
  }

  .schedule-item {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 20px;
  }

  .schedule-time {
    flex-direction: row;
    justify-content: flex-start;
    gap: 12px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 12px;
    margin-bottom: 12px;
  }

  .schedule-time .duration {
    margin-top: 0;
  }

  .schedule-badge {
    position: relative;
    top: 0;
    right: 0;
    display: inline-block;
    margin-bottom: 12px;
  }

  .schedule-details h4 {
    margin-top: 4px;
  }
}

@media (max-width: 480px) {
  .speakers-grid {
    grid-template-columns: 1fr;
  }

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

  .countdown {
    gap: 8px;
  }

  .countdown-box {
    width: 54px;
    height: 50px;
    font-size: 1.1rem;
  }

  .hero-buttons {
    flex-direction: column;
  }

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

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