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

body {
  margin: 0;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(-45deg, #fbc2eb, #a6c1ee, #fbc2eb, #a6c1ee);
  background-size: 400% 400%;
  animation: gradientBG 10s ease infinite;
}

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

.container {
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(15px);
  padding: 30px;
  border-radius: 20px;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
  width: 350px;
  text-align: center;
}

h2 {
  font-weight: bold;
  margin-bottom: 20px;
}

input {
  width: 100%;
  padding: 12px;
  margin-bottom: 20px;
  border: 2px solid #b36bff;
  border-radius: 10px;
  font-size: 16px;
  transition: all 0.3s ease;
}

input:focus {
  outline: none;
  box-shadow: 0 0 10px #b36bff;
}

.strength-bar {
  height: 10px;
  width: 100%;
  border-radius: 10px;
  background: #eee;
  overflow: hidden;
  margin-bottom: 10px;
}

.strength-fill {
  height: 100%;
  width: 0%;
  transition: width 0.4s ease;
}

.message {
  margin-bottom: 20px;
  font-weight: 600;
}

.suggestion {
  font-size: 14px;
  color: #333;
}

.weak { background: red; }
.medium { background: orange; }
.strong { background: limegreen; }