body {
  margin: 0;
  padding: 0;
  font-family: 'Arial', sans-serif;
  background-color: #ffffff;
  color: #333;
  text-align: center;
  overflow: hidden;
}

.animated-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(56, 136, 255, 0.2) 10%, rgba(255, 255, 255, 0) 70%);
  animation: ripple 6s infinite alternate ease-in-out;
}

@keyframes ripple {
  0% {
    transform: scale(1);
    opacity: 0.7;
  }
  50% {
    transform: scale(1.15);
    opacity: 0.4;
  }
  100% {
    transform: scale(1.3);
    opacity: 0.2;
  }
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
  background: #ffffff;
  border-bottom: 2px solid #e8e8e8;
  position: relative;
  z-index: 10;
}

.logo {
  font-size: 24px;
  font-weight: bold;
  color: #3888FF;
}

nav a {
  margin: 0 15px;
  text-decoration: none;
  color: #333;
  font-size: 16px;
}

button {
  background: #3888FF;
  color: white;
  border: none;
  padding: 10px 20px;
  font-size: 16px;
  border-radius: 5px;
  cursor: pointer;
  transition: background 0.3s ease;
}

button:hover {
  background: #2c6dd2;
}

main {
  margin-top: 100px;
  position: relative;
  z-index: 5;
}

h1 {
  font-size: 48px;
  color: #333;
}

.highlight {
  color: #3888FF;
}

.btn-register, .btn-create {
  margin-top: 20px;
  padding: 12px 24px;
  font-size: 18px;
}