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

body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background: linear-gradient(135deg, #2c3e50, #4ca1af);
}

.login-container {
  width: 350px;
  padding: 40px;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
  text-align: center;
}

.login-container h2 {
  margin-bottom: 20px;
  font-size: 1.5rem;
  color: #333;
}

.input-group {
  position: relative;
  margin-bottom: 30px;
}

.input-group input {
  width: 100%;
  padding: 10px 5px;
  font-size: 1rem;
  background: none;
  border: none;
  border-bottom: 2px solid #333;
  outline: none;
  color: #333;
  transition: 0.2s;
}

.input-group label {
  position: absolute;
  top: 10px;
  left: 5px;
  color: #333;
  font-size: 1rem;
  pointer-events: none;
  transition: 0.2s;
}

.input-group input:focus ~ label,
.input-group input:valid ~ label {
  top: -15px;
  font-size: 0.85rem;
  color: #4ca1af;
}

.login-btn {
  width: 100%;
  padding: 10px;
  font-size: 1rem;
  color: #fff;
  background: #4ca1af;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: 0.3s;
}

.login-btn:hover {
  background: #357f8c;
}