body, html {
  height: 100%;
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: url('images/hintergrund.jpg') no-repeat center center/cover;
  color: #333;
}

.login-container {
  height: 100%;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  background: rgba(0, 0, 0, 0.6);
}

.login-box {
  background-color: white;
  border-radius: 8px;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
  overflow: hidden;
}

.login-header {
  background-color: #2c3e50;
  color: white;
  padding: 20px;
  text-align: center;
}

.login-header h2 {
  margin: 0;
  font-size: 24px;
}

.login-header p {
  margin: 5px 0 0;
  font-size: 16px;
  opacity: 0.8;
}

.login-form {
  padding: 30px;
}

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

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: #555;
}

.form-group input {
  width: 100%;
  padding: 12px;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 16px;
  transition: border-color 0.3s;
}

.form-group input:focus {
  border-color: #2c3e50;
  outline: none;
}

.login-btn {
  width: 100%;
  padding: 12px;
  background-color: #ff5722;
  color: white;
  border: none;
  border-radius: 4px;
  font-size: 16px;
  cursor: pointer;
  transition: background-color 0.3s;
}

.login-btn:hover {
  background-color: #e64a19;
}

.login-footer {
  padding: 15px;
  text-align: center;
  border-top: 1px solid #eee;
}

.login-footer a {
  color: #2c3e50;
  text-decoration: none;
  font-size: 14px;
  transition: color 0.3s;
}

.login-footer a:hover {
  color: #ff5722;
}

.error-message {
  color: #f44336;
  margin-bottom: 15px;
  font-size: 14px;
  display: none;
}