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

body {
  height: 100vh;
  overflow: hidden;
  background: linear-gradient(135deg, #00f6ff, #7f00ff);
  color: #fff;
}

/* Particles */
#particles-js {
  position: absolute;
  width: 100%;
  height: 100%;
  z-index: 1;
}

/* Center Content */
.content {
  position: relative;
  z-index: 3;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}

/* Titles */
.content h1 {
  font-size: 5rem;
  font-weight: 800;
  letter-spacing: 6px;
  text-shadow: 0 0 15px #00ffff, 0 0 40px #7f00ff;
}

.content h2 {
  margin-top: 12px;
  font-weight: 400;
  letter-spacing: 2px;
  opacity: 0.9;
}

/* Typing */
.typing {
  margin-top: 30px;
  font-size: 1.4rem;
  letter-spacing: 4px;
  text-transform: uppercase;
  min-height: 30px;
}

/* Code Symbols */
.code-symbols span {
  position: absolute;
  color: rgba(255, 255, 255, 0.15);
  font-size: 2rem;
  font-weight: 600;
  animation: floatCode 25s linear infinite;
  text-shadow:
    0 0 10px rgba(0,255,255,0.6),
    0 0 20px rgba(127,0,255,0.6);
}

/* Different positions */
.code-symbols span:nth-child(1) { left: 10%; top: 80%; animation-duration: 20s; }
.code-symbols span:nth-child(2) { left: 25%; top: 40%; animation-duration: 28s; }
.code-symbols span:nth-child(3) { left: 50%; top: 90%; animation-duration: 22s; }
.code-symbols span:nth-child(4) { left: 70%; top: 60%; animation-duration: 30s; }
.code-symbols span:nth-child(5) { left: 85%; top: 85%; animation-duration: 26s; }
.code-symbols span:nth-child(6) { left: 40%; top: 20%; animation-duration: 24s; }

/* Animation */
@keyframes floatCode {
  0% {
    transform: translateY(0) rotate(0deg);
    opacity: 0;
  }
  10% { opacity: 1; }
  100% {
    transform: translateY(-1000px) rotate(360deg);
    opacity: 0;
  }
}

/* Responsive */
@media (max-width: 600px) {
  .content h1 { font-size: 3rem; }
}