/* AI Conclave 2026 — Single Page Hero */

:root {
  --bg-deep: #000000;
  --bg-mid: #000000;
  --bg-accent: #000000;
  --white: #ffffff;
  --white-70: rgba(255, 255, 255, 0.7);
  --white-50: rgba(255, 255, 255, 0.5);
  --white-20: rgba(255, 255, 255, 0.2);
  --white-10: rgba(255, 255, 255, 0.1);
  --white-05: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.12);
  --glow-blue: 0 0 30px rgba(59, 130, 246, 0.4);
  --blue: #3B82F6;
  --purple: #7C3AED;
  --cyan: #06B6D4;
  --gradient-main: linear-gradient(135deg, var(--blue), var(--purple), var(--cyan));
  --font-body: 'Inter', system-ui, sans-serif;
  --font-display: 'Bungee', cursive;
  --shadow-3d-white:
    0 1px 0 #d1d5db,
    0 2px 0 #9ca3af,
    0 3px 0 #6b7280,
    0 4px 0 #4b5563,
    0 5px 0 #374151,
    0 6px 0 #1f2937,
    0 10px 20px rgba(0, 0, 0, 0.55);
  --shadow-3d-blue:
    0 1px 0 #3b82f6,
    0 2px 0 #2563eb,
    0 3px 0 #1d4ed8,
    0 4px 0 #1e40af,
    0 5px 0 #1e3a8a,
    0 6px 0 #172554,
    0 10px 18px rgba(0, 0, 0, 0.5);
  --shadow-3d-sm:
    0 1px 0 #6b7280,
    0 2px 0 #4b5563,
    0 3px 0 #374151,
    0 5px 10px rgba(0, 0, 0, 0.4);
  --nav-height: 72px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: var(--font-body);
  background: #000000;
  color: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ---- Background Effects ---- */

#particle-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.orb {
  display: none;
}

/* ---- Reveal Animation ---- */

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ---- Navbar ---- */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  transition: background var(--transition), box-shadow var(--transition);
}

.navbar.scrolled {
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
}

.nav-container {
  display: flex;
  align-items: flex-start;
  height: 100%;
  width: 100%;
  margin: 0;
  padding: 20px 0 0 16px;
}

.nav-brand {
  display: flex;
  align-items: center;
  text-decoration: none;
  margin-left: 0;
}

.nav-logo {
  height: 58px;
  width: auto;
  object-fit: contain;
}

/* ---- Hero ---- */

.hero {
  position: relative;
  z-index: 1;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--nav-height) + 1rem) 1.5rem 2rem;
}

.hero-content {
  max-width: 900px;
}

.hero-venue {
  text-align: center;
  margin-bottom: 0.75rem;
}

.venue-line {
  margin: 0;
  text-transform: uppercase;
}

.venue-line-main {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 4vw, 2.2rem);
  font-weight: 400;
  color: #5eb3ff;
  letter-spacing: 0.04em;
  line-height: 1.2;
  text-shadow: var(--shadow-3d-blue);
}

.venue-line-sub {
  font-family: var(--font-display);
  font-size: clamp(0.95rem, 2.6vw, 1.45rem);
  font-weight: 400;
  color: #5eb3ff;
  letter-spacing: 0.12em;
  margin-top: 0.3rem;
  text-shadow: var(--shadow-3d-sm);
}

.venue-line-location {
  font-size: clamp(0.85rem, 2.2vw, 1.1rem);
  font-weight: 500;
  color: var(--white-50);
  letter-spacing: 0.22em;
  margin-top: 0.25rem;
}

.hero-presents {
  font-family: var(--font-display);
  font-size: clamp(1rem, 2.5vw, 1.35rem);
  font-weight: 400;
  color: #d1d5db;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  text-align: center;
  margin: 0 0 1.5rem;
  text-shadow: var(--shadow-3d-sm);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.65rem 1.6rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  border-radius: 50px;
  font-size: clamp(0.95rem, 2.2vw, 1.15rem);
  font-weight: 500;
  color: var(--cyan);
  margin-top: 1.25rem;
  backdrop-filter: blur(12px);
  font-family: var(--font-body);
}

.badge-dot {
  width: 10px;
  height: 10px;
  background: var(--cyan);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
  box-shadow: 0 0 10px var(--cyan);
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.hero-title {
  font-family: var(--font-display);
  line-height: 1.05;
  margin-bottom: 1.75rem;
}

.title-main {
  display: flex;
  flex-wrap: nowrap;
  align-items: baseline;
  justify-content: center;
  gap: 0.3em;
  font-size: clamp(2.5rem, 8.5vw, 5rem);
  font-weight: 400;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.title-ai {
  color: #ffffff;
  text-shadow: var(--shadow-3d-white);
}

.title-gradient {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientShift 6s ease infinite;
  background-size: 200% 200%;
  filter:
    drop-shadow(0 1px 0 #7c3aed)
    drop-shadow(0 2px 0 #6d28d9)
    drop-shadow(0 3px 0 #5b21b6)
    drop-shadow(0 4px 0 #4c1d95)
    drop-shadow(0 5px 0 #3b0764)
    drop-shadow(0 8px 16px rgba(0, 0, 0, 0.55));
}

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

.title-year {
  display: block;
  font-size: clamp(1.85rem, 5.5vw, 3.2rem);
  font-weight: 400;
  letter-spacing: 0.25em;
  margin-top: 0.2rem;
  color: #e5e7eb;
  text-shadow:
    0 1px 0 #9ca3af,
    0 2px 0 #6b7280,
    0 3px 0 #4b5563,
    0 4px 0 #374151,
    0 5px 0 #1f2937,
    0 8px 18px rgba(0, 0, 0, 0.55);
}

.hero-subtitle {
  font-size: clamp(0.95rem, 2.5vw, 1.15rem);
  color: var(--white-70);
  max-width: 620px;
  margin: 0 auto 1.75rem;
  line-height: 1.7;
}

.highlight {
  color: var(--cyan);
  font-weight: 600;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.55rem;
}

.tag {
  padding: 0.38rem 0.95rem;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border: 1px solid var(--glass-border);
  border-radius: 50px;
  background: var(--white-05);
  color: var(--white-70);
  transition: var(--transition);
}

.tag:hover {
  border-color: var(--blue);
  color: var(--white);
  box-shadow: var(--glow-blue);
}

/* ---- Responsive ---- */

@media (max-width: 768px) {
  .nav-container {
    padding: 16px 0 0 12px;
  }

  .nav-logo {
    height: 46px;
  }

  .venue-line-main {
    font-size: clamp(0.9rem, 3.8vw, 1.4rem);
    letter-spacing: 0.02em;
  }

  .venue-line-sub {
    font-size: clamp(0.75rem, 2.8vw, 1.1rem);
    letter-spacing: 0.12em;
  }

  .venue-line-location {
    font-size: clamp(0.65rem, 2.2vw, 0.9rem);
    letter-spacing: 0.15em;
  }

  .hero-presents {
    font-size: clamp(0.8rem, 2.2vw, 1.1rem);
    letter-spacing: 0.25em;
    margin-bottom: 1.25rem;
  }

  .title-main {
    font-size: clamp(1.85rem, 9vw, 3rem);
    gap: 0.2em;
  }

  .title-year {
    font-size: clamp(1.5rem, 6vw, 2.2rem);
    letter-spacing: 0.15em;
    text-shadow:
      0 1px 0 #6b7280,
      0 2px 0 #4b5563,
      0 3px 0 #374151,
      0 5px 12px rgba(0, 0, 0, 0.5);
  }

  .title-ai {
    text-shadow:
      0 1px 0 #9ca3af,
      0 2px 0 #6b7280,
      0 3px 0 #4b5563,
      0 5px 12px rgba(0, 0, 0, 0.5);
  }

  .title-gradient {
    filter:
      drop-shadow(0 1px 0 #6d28d9)
      drop-shadow(0 2px 0 #5b21b6)
      drop-shadow(0 3px 0 #4c1d95)
      drop-shadow(0 5px 10px rgba(0, 0, 0, 0.5));
  }
}

@media (max-width: 400px) {
  .title-main {
    font-size: 1.75rem;
  }

  .hero-tags {
    gap: 0.35rem;
  }

  .tag {
    font-size: 0.6rem;
    padding: 0.3rem 0.65rem;
  }
}