/* styles.css */
:root {
  --bg-deep: #060612;
  --surface: rgba(15, 15, 35, 0.6);
  --surface-hover: rgba(22, 22, 50, 0.7);
  --border: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.1);
  --text: #f0f0f8;
  --text-secondary: #b8b8d0;
  --text-muted: #707088;
  --accent-blue: #4d8cf7;
  --accent-purple: #9b6ff6;
  --accent-cyan: #22c9e0;
  --accent-soft: #7b9fff;
  --gradient-hero: radial-gradient(ellipse at 50% 0%, rgba(77, 140, 247, 0.18), transparent 55%);
  --gradient-purple: radial-gradient(ellipse at 80% 100%, rgba(155, 111, 246, 0.12), transparent 50%);
  --gradient-cyan: radial-gradient(ellipse at 20% 50%, rgba(34, 201, 224, 0.08), transparent 50%);
  --font-sans: 'Plus Jakarta Sans', 'Inter', system-ui, -apple-system, sans-serif;
  --radius-sm: 0.75rem;
  --radius: 1rem;
  --radius-lg: 1.5rem;
  --radius-xl: 2rem;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font-sans);
  background: var(--bg-deep);
  color: var(--text);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  letter-spacing: -0.01em;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

#particleCanvas {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.35;
}
.bg-gradient-1, .bg-gradient-2, .bg-gradient-3, .bg-grid {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: -1;
}
.bg-gradient-1 { background: var(--gradient-hero); }
.bg-gradient-2 { background: var(--gradient-purple); }
.bg-gradient-3 { background: var(--gradient-cyan); }
.bg-grid {
  background-image: 
    linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
  background-size: 60px 60px;
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(8, 8, 20, 0.75);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 0;
}
.logo {
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.3px;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.logo-icon { 
  color: var(--accent-soft);
  font-size: 1.1rem;
}
.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
  align-items: center;
}
.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.88rem;
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--text); }
.nav-cta {
  background: rgba(255,255,255,0.06);
  padding: 0.45rem 1.1rem;
  border-radius: 2rem;
  border: 1px solid rgba(255,255,255,0.08);
  transition: all var(--transition);
}
.nav-cta:hover { 
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.15);
}
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.mobile-menu-btn span {
  width: 22px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s;
}

/* Hero */
.hero {
  padding: 4rem 0 5rem;
  text-align: center;
  position: relative;
  z-index: 1;
}
.hero-content {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(77, 140, 247, 0.08);
  border: 1px solid rgba(77, 140, 247, 0.2);
  padding: 0.45rem 1.2rem;
  border-radius: 2rem;
  font-size: 0.85rem;
  color: var(--accent-soft);
  margin-bottom: 2rem;
  font-weight: 500;
}
.live-dot {
  width: 7px; height: 7px;
  background: #4ade80;
  border-radius: 50%;
  animation: pulse-dot 2.5s infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}
.hero-title {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1.5rem;
}
.hero-brand {
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 800;
  letter-spacing: -2px;
  background: linear-gradient(160deg, #ffffff 0%, #c4d4ff 50%, #a0b8ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}
.hero-event {
  font-size: clamp(1.1rem, 2.5vw, 1.6rem);
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 4px;
  text-transform: uppercase;
}
.hero-tagline {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  max-width: 600px;
  font-weight: 500;
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 2.5rem;
}
.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 3rem;
}

/* Buttons */
.btn {
  padding: 0.85rem 2rem;
  border-radius: 3rem;
  font-weight: 600;
  font-size: 0.9rem;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  text-decoration: none;
  font-family: var(--font-sans);
  letter-spacing: -0.01em;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent-blue), #6b8cf7);
  color: white;
  box-shadow: 0 4px 18px rgba(77, 140, 247, 0.25);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(77, 140, 247, 0.35);
}
.btn-secondary {
  background: rgba(255,255,255,0.04);
  color: var(--text);
  border: 1px solid rgba(255,255,255,0.1);
  backdrop-filter: blur(10px);
}
.btn-secondary:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.18);
}
.btn-large { padding: 1rem 2.5rem; font-size: 1rem; }
.btn-arrow { 
  transition: transform 0.3s ease;
  font-size: 1.1rem;
}
.btn-primary:hover .btn-arrow { transform: translateX(4px); }

/* Stats */
.hero-stats {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  margin-bottom: 2.5rem;
  padding: 1.5rem 2.5rem;
  background: rgba(20, 20, 45, 0.5);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(12px);
}
.stat-item { text-align: center; }
.stat-number {
  font-size: 2rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent-soft), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
  line-height: 1.2;
}
.stat-label { 
  font-size: 0.78rem; 
  color: var(--text-muted); 
  text-transform: uppercase; 
  letter-spacing: 1px; 
  font-weight: 500;
}
.stat-divider { 
  width: 1px; 
  height: 36px; 
  background: rgba(255,255,255,0.08); 
}

/* Countdown */
.countdown-card {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  align-items: center;
  background: rgba(10, 10, 28, 0.5);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-xl);
  padding: 1.2rem 2rem;
  backdrop-filter: blur(12px);
}
.countdown-item { text-align: center; min-width: 65px; }
.countdown-number {
  font-family: 'JetBrains Mono', monospace;
  font-size: 2.6rem;
  font-weight: 500;
  color: var(--text);
  letter-spacing: 2px;
}
.countdown-label { 
  font-size: 0.7rem; 
  color: var(--text-muted); 
  text-transform: uppercase; 
  letter-spacing: 1.5px; 
  font-weight: 500;
}
.countdown-separator { 
  font-size: 1.8rem; 
  color: var(--text-muted); 
  font-weight: 300;
}

/* Sections */
.section { padding: 6rem 0; position: relative; z-index: 1; }
.section-label {
  text-align: center;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--accent-soft);
  margin-bottom: 0.8rem;
  font-weight: 600;
}
.section-title {
  text-align: center;
  font-size: clamp(2rem, 4.5vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 0.8rem;
  line-height: 1.25;
}
.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 3rem;
  font-size: 1rem;
}
.section-subtitle a { 
  color: var(--accent-soft); 
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
}
.about-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.2rem 1.8rem;
  transition: all var(--transition);
}
.about-card:hover {
  border-color: var(--border-hover);
  background: var(--surface-hover);
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.2);
}
.about-icon { font-size: 2.2rem; margin-bottom: 1rem; }
.about-card h3 { 
  margin-bottom: 0.5rem; 
  font-weight: 600;
  font-size: 1.15rem;
}
.about-card p { 
  color: var(--text-secondary); 
  font-size: 0.92rem; 
  line-height: 1.6;
}

/* Attend Cards */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
}
.attend-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  text-align: center;
  transition: all var(--transition);
}
.attend-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.2);
}
.card-emoji { font-size: 2.6rem; margin-bottom: 0.8rem; }
.attend-card h3 { 
  margin-bottom: 0.4rem; 
  font-weight: 600;
  font-size: 1.05rem;
}
.attend-card p { 
  color: var(--text-secondary); 
  font-size: 0.88rem; 
  line-height: 1.55;
}

/* Timeline */
.timeline {
  max-width: 780px;
  margin: 3rem auto 0;
  position: relative;
}
.timeline-item {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 1.2rem;
  position: relative;
}
.timeline-marker {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 18px;
  flex-shrink: 0;
}
.marker-dot {
  width: 10px; height: 10px;
  background: var(--accent-soft);
  border-radius: 50%;
  box-shadow: 0 0 10px rgba(123, 159, 255, 0.4);
  transition: all 0.3s;
}
.timeline-item:hover .marker-dot {
  box-shadow: 0 0 18px rgba(123, 159, 255, 0.6);
  transform: scale(1.3);
}
.marker-line {
  width: 1px;
  flex: 1;
  background: rgba(255,255,255,0.06);
  margin-top: 6px;
}
.timeline-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.6rem;
  flex: 1;
  transition: all var(--transition);
  cursor: default;
}
.timeline-card:hover {
  border-color: rgba(123, 159, 255, 0.25);
  background: var(--surface-hover);
  box-shadow: 0 6px 24px rgba(0,0,0,0.25);
}
.day-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.4rem;
  align-items: center;
}
.day-number { 
  font-weight: 700; 
  color: var(--accent-soft); 
  font-size: 0.9rem;
}
.day-date { 
  color: var(--text-muted); 
  font-size: 0.8rem; 
  font-weight: 500;
}
.timeline-card h3 { 
  margin-bottom: 0.4rem; 
  font-weight: 600;
  font-size: 1.05rem;
}
.timeline-card p { 
  color: var(--text-secondary); 
  font-size: 0.88rem; 
  margin-bottom: 0.8rem; 
  line-height: 1.55;
}
.timeline-tags { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.timeline-tags span {
  background: rgba(123, 159, 255, 0.08);
  color: var(--accent-soft);
  padding: 0.2rem 0.7rem;
  border-radius: 1rem;
  font-size: 0.72rem;
  font-weight: 500;
}

/* Speakers */
.speaker-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}
.speaker-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  text-align: center;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
}
.speaker-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 10px 35px rgba(0,0,0,0.3);
}
.speaker-photo {
  width: 90px; 
  height: 90px;
  border-radius: 50%;
  margin: 0 auto 1rem;
  overflow: hidden;
  border: 2px solid rgba(255,255,255,0.1);
  background: linear-gradient(135deg, #1a1a35, #252545);
  display: flex;
  align-items: center;
  justify-content: center;
}
.speaker-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.speaker-photo-placeholder {
  font-size: 2rem;
  color: var(--text-muted);
}
.speaker-name { 
  font-weight: 700; 
  margin-bottom: 0.15rem; 
  font-size: 1.05rem;
  color: var(--text);
}
.speaker-role { 
  color: var(--text-secondary); 
  font-size: 0.82rem; 
  margin-bottom: 0.15rem;
  line-height: 1.4;
}
.speaker-country { 
  color: var(--text-muted); 
  font-size: 0.78rem; 
  margin-bottom: 0.6rem; 
  font-weight: 500;
}
.speaker-topic {
  background: rgba(155, 111, 246, 0.08);
  color: var(--accent-purple);
  padding: 0.25rem 0.9rem;
  border-radius: 1rem;
  font-size: 0.75rem;
  display: inline-block;
  margin-bottom: 0.8rem;
  font-weight: 500;
}
.speaker-expertise {
  color: var(--text-muted);
  font-size: 0.75rem;
  margin-bottom: 0.8rem;
  line-height: 1.4;
  max-width: 220px;
}
.linkedin-link {
  color: var(--accent-soft);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.82rem;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  transition: color 0.2s;
}
.linkedin-link:hover { 
  color: #fff;
  text-decoration: underline;
}

/* Speaker Apply */
.apply-flow {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin: 3rem 0;
}
.apply-step {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  text-align: center;
  transition: all var(--transition);
}
.apply-step:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
}
.step-number {
  width: 38px; height: 38px;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-soft));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  margin: 0 auto 0.8rem;
  font-size: 0.9rem;
  box-shadow: 0 4px 12px rgba(77,140,247,0.25);
}
.apply-step h3 {
  font-weight: 600;
  margin-bottom: 0.4rem;
  font-size: 1rem;
}
.apply-step p {
  color: var(--text-secondary);
  font-size: 0.85rem;
  line-height: 1.5;
}
.apply-cta { text-align: center; margin-top: 1.5rem; }

/* Gallery */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}
.gallery-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.88rem;
  transition: all var(--transition);
  font-weight: 500;
}
.gallery-item:hover { 
  border-color: var(--border-hover); 
  background: var(--surface-hover);
  color: var(--text-secondary);
}

/* Testimonials */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}
.testimonial-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--transition);
}
.testimonial-card:hover {
  border-color: var(--border-hover);
}
.testimonial-text { 
  color: var(--text-secondary); 
  font-style: italic; 
  margin-bottom: 1.5rem; 
  font-size: 0.92rem;
  line-height: 1.6;
}
.testimonial-author { display: flex; align-items: center; gap: 0.8rem; }
.testimonial-avatar {
  width: 44px; height: 44px;
  background: var(--surface-hover);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
}
.testimonial-author strong { display: block; font-size: 0.88rem; font-weight: 600; }
.testimonial-author span { color: var(--text-muted); font-size: 0.78rem; }

/* FAQ */
.faq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 0.8rem;
  margin-top: 2rem;
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
}
.faq-item:hover {
  border-color: var(--border-hover);
}
.faq-question {
  width: 100%;
  background: none;
  border: none;
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.1rem 1.5rem;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-sans);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.faq-answer p { 
  padding: 0 1.5rem 1.1rem; 
  color: var(--text-secondary); 
  font-size: 0.88rem;
  line-height: 1.55;
}
.faq-item.active .faq-answer { max-height: 180px; }
.faq-icon { 
  font-size: 1.3rem; 
  color: var(--text-muted); 
  transition: transform 0.35s ease;
  font-weight: 300;
}
.faq-item.active .faq-icon { transform: rotate(45deg); }

/* CTA Final */
.cta-final {
  text-align: center;
  padding: 6rem 0;
}
.cta-final h2 { 
  font-size: clamp(2rem, 5vw, 2.8rem); 
  margin-bottom: 0.8rem; 
  font-weight: 700;
  letter-spacing: -0.5px;
}
.cta-final p { 
  color: var(--text-secondary); 
  margin-bottom: 2rem; 
  font-size: 1.05rem;
}
.cta-buttons { display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap; }

/* Footer */
.footer {
  background: rgba(8, 8, 20, 0.7);
  border-top: 1px solid rgba(255,255,255,0.05);
  padding: 4rem 0 2rem;
  margin-top: 2rem;
  backdrop-filter: blur(10px);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}
.footer-brand p { 
  color: var(--text-muted); 
  margin-top: 0.4rem; 
  font-size: 0.88rem; 
  line-height: 1.5;
}
.footer-links h4 { 
  margin-bottom: 0.8rem; 
  font-size: 0.82rem; 
  text-transform: uppercase; 
  letter-spacing: 1.5px; 
  color: var(--text-muted); 
  font-weight: 600;
}
.footer-links a {
  display: block;
  color: var(--text-secondary);
  text-decoration: none;
  margin-bottom: 0.45rem;
  font-size: 0.88rem;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--text); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.04);
  padding-top: 1.5rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.82rem;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .mobile-menu-btn { display: flex; }
  .hero-stats { gap: 1rem; padding: 1rem 1.5rem; }
  .stat-number { font-size: 1.5rem; }
  .stat-divider { height: 28px; }
  .countdown-number { font-size: 2rem; }
  .countdown-card { padding: 1rem 1.2rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 1.5rem; }
  .timeline-item { flex-direction: column; }
  .timeline-marker { display: none; }
  .faq-grid { grid-template-columns: 1fr; }
  .section { padding: 4rem 0; }
}
@media (max-width: 480px) {
  .hero-meta { flex-direction: column; gap: 0.4rem; font-size: 0.85rem; }
  .countdown-card { gap: 0.2rem; }
  .countdown-number { font-size: 1.5rem; }
  .countdown-item { min-width: 50px; }
  .hero-stats { gap: 0.5rem; }
  .stat-number { font-size: 1.3rem; }
  .footer-grid { grid-template-columns: 1fr; }
}