body, html {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: white;
  text-align: center;
  overflow: hidden;
  background: linear-gradient(
    120deg, 
    #00b5f1,
    #7a3eb1,
    #00b5f1,
    #7a3eb1
  );
  background-size: 300% 300%;
  animation: gradientShift 12s ease infinite;
  position: relative;
}

/* Floating Logo */
.logo {
  position: absolute;
  width: 300px;
  height: auto;
  animation: floatAround 30s ease-in-out infinite;
  user-select: none;
  z-index: 1;
}

/* Particles */
.particles {
  position: absolute;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: 0;
}

.particles span {
  position: absolute;
  display: block;
  width: 25px;
  height: 25px;
  background: rgba(255, 255, 255, 0.5);
  border-radius: 50%;
  animation: float 10s linear infinite;
}

@keyframes float {
  0% { transform: translateY(100vh) scale(0); }
  50% { transform: translateY(50vh) scale(1); }
  100% { transform: translateY(-10vh) scale(0); }
}

/* Center container without flex */
.center-container {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 2;
}

/* Text */
h1 {
  font-size: 3rem;
  margin-bottom: 0.5rem;
  letter-spacing: 0.05em;
  text-shadow: 0 0 10px rgba(255,255,255,0.5);
}

p {
  font-size: 1.2rem;
  opacity: 0.85;
  text-shadow: 0 0 8px rgba(255,255,255,0.3);
}

/* Animations */
@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes floatAround {
  0%   { top: 10%; left: 10%; }
  25%  { top: 10%; left: 80%; }
  50%  { top: 80%; left: 80%; }
  75%  { top: 80%; left: 10%; }
  100% { top: 10%; left: 10%; }
}