* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  background: #0c0c0c;
  color: #f2f2f2;
  overflow-x: hidden;
}

/* PARTICLES */
.particles {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 2px;
  height: 2px;
  background: rgba(255,255,255,0.3);
  border-radius: 50%;
  animation: float linear infinite;
}

@keyframes float {
  0% {
    transform: translateY(100vh) translateX(0);
    opacity: 0;
  }
  10% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    transform: translateY(-100px) translateX(var(--drift));
    opacity: 0;
  }
}

/* BACKGROUND ANIMATED GRID */
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: 0;
  background-image: 
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 50px 50px;
  animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
  0% { transform: translate(0, 0); }
  100% { transform: translate(50px, 50px); }
}

/* RADIAL GRADIENT FOLLOWS MOUSE */
.bg-glow {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: radial-gradient(600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(88, 70, 180, 0.08), transparent 60%);
  transition: opacity 0.3s ease;
}

/* HERO */
.hero {
  position: relative;
  z-index: 2;
  height: 45vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 2rem;
  background: linear-gradient(to bottom, rgba(17,17,17,0.8), rgba(12,12,12,0.4));
}

.hero h1 {
  font-size: 4rem;
  font-family: 'Orbitron', sans-serif;
  font-weight: 900;
  letter-spacing: 4px;
  text-transform: uppercase;
  margin-bottom: 1rem;
  background: linear-gradient(90deg, #fff 20%, #aaa 50%, #fff 80%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shimmer 3s linear infinite;
}

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

.hero .subtitle {
  font-size: 1.2rem;
  opacity: 0.85;
  margin-bottom: 2rem;
  min-height: 1.5rem;
  font-family: 'Courier New', monospace;
  letter-spacing: 0.5px;
}

.hero .subtitle::after {
  content: '|';
  animation: blink 1s step-end infinite;
  margin-left: 2px;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

/* CTA BUTTON WITH GLASSMORPHISM */
.cta-btn {
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 1px;
  border: 2px solid rgba(255,255,255,0.3);
  border-radius: 12px;
  background: rgba(255,255,255,0.08);
  color: #fff;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(.2,.9,.2,1);
  backdrop-filter: blur(12px) saturate(180%);
  box-shadow: 0 8px 32px rgba(0,0,0,0.1);
  position: relative;
  overflow: hidden;
}

.cta-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
  transform: translateX(-100%);
  transition: transform 0.6s ease;
}

.cta-btn:hover {
  border-color: rgba(120,75,160,0.8);
  background: rgba(255,255,255,0.12);
  box-shadow: 0 12px 40px rgba(120,75,160,0.3);
  transform: translateY(-2px);
  backdrop-filter: blur(16px) saturate(200%);
}

.cta-btn:hover::before {
  transform: translateX(100%);
}

/* SPACER */
.spacer {
  position: relative;
  z-index: 2;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.spacer::before {
  content: '';
  width: 80%;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
  box-shadow: 0 0 20px rgba(255,255,255,0.2);
  animation: spacerPulse 3s ease-in-out infinite;
}

@keyframes spacerPulse {
  0%, 100% { opacity: 0.4; transform: scaleX(1); }
  50% { opacity: 1; transform: scaleX(1.2); }
}

/* CARDS */
.cards {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  padding: 3rem;
  max-width: 1400px;
  margin: 0 auto;
}

/* CARD ADVANCED */
.card-advanced {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  display: block;
  height: 380px;
  transition: transform 280ms cubic-bezier(.2,.9,.2,1);
  will-change: transform;
  text-decoration: none;
  color: inherit;
}

.card-advanced .thumb {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  transition: transform 600ms cubic-bezier(.2,.9,.2,1), opacity 420ms ease;
  transform-origin: center;
}

.card-advanced .thumb.default {
  z-index: 0;
  transform: scale(1);
  opacity: 1;
}

.card-advanced .thumb.hover {
  z-index: 1;
  opacity: 0;
  transform: scale(1.02) translateY(6px);
  filter: brightness(0.9) saturate(1.05);
}

.card-advanced .overlay {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 20px;
  z-index: 2;
  transform: translateY(20px);
  opacity: 0;
  transition: transform 360ms cubic-bezier(.22,.9,.2,1), opacity 300ms ease;
  background: linear-gradient(to top, rgba(6,6,6,0.85) 10%, rgba(6,6,6,0.35) 60%, rgba(6,6,6,0.0) 100%);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.card-advanced .badge {
  display: block;
  font-size: 11px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  backdrop-filter: blur(4px);
  color: #fff;
  font-weight: 700;
  letter-spacing: 0.6px;
  position: relative;
  overflow: hidden;
}

.card-advanced .badge::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transform: translateX(-100%);
}

.card-advanced:hover .badge::before {
  animation: badgeShine 1s ease;
}

@keyframes badgeShine {
  to { transform: translateX(100%); }
}

.card-advanced .badge-neon {
  background: linear-gradient(90deg,#ff3cac,#784ba0);
  box-shadow: 0 4px 18px rgba(120,75,160,0.28);
}

.card-advanced .badge-wiki {
  background: linear-gradient(90deg,#4facfe,#00f2fe);
  box-shadow: 0 4px 18px rgba(79,172,254,0.28);
}

.card-advanced .badge-lab {
  background: linear-gradient(90deg,#fa709a,#fee140);
  box-shadow: 0 4px 18px rgba(250,112,154,0.28);
}

.card-advanced .badge-dev {
  background: linear-gradient(90deg,#30cfd0,#330867);
  box-shadow: 0 4px 18px rgba(48,207,208,0.28);
}

.card-advanced h3 {
  margin: 4px 0 0;
  font-size: 1.1rem;
  font-weight: 800;
  display: none;
}

.card-advanced p {
  margin: 0;
  font-size: 0.85rem;
  opacity: 0.9;
}

.card-advanced .enter-btn {
  margin-top: 10px;
  align-self: start;
  padding: 8px 14px;
  border-radius: 10px;
  border: none;
  font-weight: 700;
  cursor: pointer;
  background: linear-gradient(90deg,#5b4bff,#7c4dff);
  color: white;
  transform: translateY(8px) scale(0.98);
  opacity: 0;
  transition: transform 260ms cubic-bezier(.2,.9,.2,1), opacity 240ms ease, box-shadow 240ms ease;
  box-shadow: 0 6px 18px rgba(92,64,255,0.12);
}

.card-advanced:hover,
.card-advanced:focus-within,
.card-advanced.is-active {
  transform: translateY(-6px) scale(1.02);
}

.card-advanced:hover .thumb.hover,
.card-advanced:focus-within .thumb.hover,
.card-advanced.is-active .thumb.hover {
  opacity: 1;
  transform: scale(1.06) translateY(0);
}

.card-advanced:hover .overlay,
.card-advanced:focus-within .overlay,
.card-advanced.is-active .overlay {
  transform: translateY(0);
  opacity: 1;
}

.card-advanced:hover .enter-btn,
.card-advanced:focus-within .enter-btn,
.card-advanced.is-active .enter-btn {
  transform: translateY(0) scale(1);
  opacity: 1;
}

.card-advanced .enter-btn:hover,
.card-advanced .enter-btn:focus {
  transform: translateY(0) scale(1.02);
  box-shadow: 0 12px 30px rgba(92,64,255,0.18);
}

.card-advanced:focus-within {
  outline: 3px solid rgba(120,75,160,0.14);
  outline-offset: 4px;
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.5rem;
    letter-spacing: 2px;
  }
  .cards {
    grid-template-columns: 1fr;
    padding: 2rem 1rem;
  }
}