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

body {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(270deg, #4facfe, #00f2fe, #6a11cb, #2575fc);
  background-size: 800% 800%;
  animation: gradientMove 15s ease infinite;
}

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

/* Blob animasi */
.blob {
  position: absolute;
  width: 300px;
  height: 300px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  filter: blur(100px);
  animation: moveBlob 20s infinite alternate ease-in-out;
}

.blob:nth-child(1) {
  top: -100px;
  left: -100px;
}

.blob:nth-child(2) {
  bottom: -100px;
  right: -100px;
  animation-delay: 5s;
}

@keyframes moveBlob {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(100px, 50px) scale(1.3); }
}

.login-container {
  position: relative;
  z-index: 2;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(15px);
  padding: 40px 30px;
  border-radius: 15px;
  width: 100%;
  max-width: 350px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.2);
  text-align: center;
  color: #fff;
}

.login-container h2 {
  margin-bottom: 20px;
}

.input-group {
  margin-bottom: 20px;
}

.input-group input {
  width: 100%;
  padding: 12px 15px;
  border-radius: 10px;
  border: none;
  outline: none;
  font-size: 16px;
}

.btn {
  width: 100%;
  padding: 12px;
  border: none;
  border-radius: 10px;
  background: #fff;
  color: #333;
  font-size: 16px;
  cursor: pointer;
  transition: 0.3s;
}

.btn:hover {
  opacity: 0.85;
}

@media (max-width: 400px) {
  .login-container {
    padding: 30px 20px;
  }
}