body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #667eea, #764ba2);
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.container {
  background: white;
  padding: 30px;
  border-radius: 15px;
  width: 350px;
  text-align: center;
  box-shadow: 0 8px 25px rgba(0,0,0,0.2);
  animation: fadeIn 0.8s ease-in-out;
}

h2 {
  margin-bottom: 20px;
  color: #333;
}

form input {
  width: 100%;
  padding: 12px;
  margin: 10px 0;
  border-radius: 8px;
  border: 1px solid #ccc;
  outline: none;
  transition: 0.3s;
}

form input:focus {
  border-color: #667eea;
  box-shadow: 0 0 8px rgba(102, 126, 234, 0.5);
}

button {
  width: 100%;
  padding: 12px;
  background: linear-gradient(135deg, #667eea, #764ba2);
  border: none;
  border-radius: 8px;
  color: white;
  font-size: 16px;
  cursor: pointer;
  transition: 0.3s;
}

button:hover {
  background: linear-gradient(135deg, #5a67d8, #6b46c1);
}

.error {
  color: red;
  margin-bottom: 15px;
}

.logout {
  display: inline-block;
  margin-top: 20px;
  padding: 10px 20px;
  background: crimson;
  color: white;
  border-radius: 8px;
  text-decoration: none;
  transition: 0.3s;
}

.logout:hover {
  background: darkred;
}

@keyframes fadeIn {
  from { opacity: 0; transform: scale(0.9); }
  to { opacity: 1; transform: scale(1); }
}