body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  height: 100vh;
  background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-container {
  background: rgba(255, 255, 255, 0.05);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 15px;
  padding: 40px;
  width: 100%;
  max-width: 400px;
  color: white;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.login-container h2 {
  text-align: center;
  margin-bottom: 25px;
  font-weight: 600;
}

.login-container input {
  width: 100%;
  padding: 12px 15px;
  margin: 10px 0;
  background: rgba(255,255,255,0.1);
  border: none;
  border-radius: 8px;
  color: #fff;
  font-size: 16px;
  box-sizing: border-box;
}

.login-container input::placeholder {
  color: #bbb;
}

.login-container button {
  width: 100%;
  padding: 12px;
  background: #1abc9c;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: bold;
  color: white;
  cursor: pointer;
  transition: background 0.3s ease;
  margin: 10px 0;
}

.login-container button:hover {
  background: #16a085;
}

.error {
  background: rgba(255, 0, 0, 0.15);
  padding: 10px;
  border-radius: 8px;
  color: #ffaaaa;
  margin-bottom: 10px;
  text-align: center;
  font-size: 14px;
}