* {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            font-family: 'Poppins', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 20px;
            color: #333;
        }
        
        .login-container {
            max-width: 400px;
            width: 100%;
            background: white;
            border-radius: 15px;
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
            padding: 40px;
            position: relative;
            overflow: hidden;
        }
        
        .login-container::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 5px;
            background: linear-gradient(90deg, #667eea, #764ba2);
        }
        
        h1 {
            text-align: center;
            color: #333;
            margin-bottom: 25px;
            font-weight: 700;
            font-size: 2.2rem;
            background: linear-gradient(90deg, #667eea, #764ba2);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        
        .logo {
            text-align: center;
            margin-bottom: 20px;
        }
        
        .logo i {
            font-size: 3rem;
            color: #667eea;
            margin-bottom: 10px;
        }
        
        .form-group {
            margin-bottom: 25px;
            position: relative;
        }
        
        label {
            display: block;
            margin-bottom: 10px;
            font-weight: 600;
            color: #444;
            font-size: 1.1rem;
        }
        
        .input-with-icon {
            position: relative;
        }
        
        .input-icon {
            position: absolute;
            left: 15px;
            top: 50%;
            transform: translateY(-50%);
            color: #667eea;
            font-size: 18px;
        }
        
        input[type="text"],
        input[type="password"] {
            width: 100%;
            padding: 15px 20px 15px 45px;
            border: 2px solid #ddd;
            border-radius: 8px;
            font-size: 16px;
            transition: all 0.3s;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
        }
        
        input[type="text"]:focus,
        input[type="password"]:focus {
            border-color: #667eea;
            outline: none;
            box-shadow: 0 5px 15px rgba(102, 126, 234, 0.1);
        }
        
        .remember-me {
            display: flex;
            align-items: center;
            margin-bottom: 25px;
        }
        
        .remember-me input {
            margin-right: 10px;
            width: 18px;
            height: 18px;
            accent-color: #667eea;
        }
        
        .remember-me label {
            margin-bottom: 0;
            font-weight: 500;
            color: #666;
        }
        
        button {
            background: linear-gradient(90deg, #667eea, #764ba2);
            color: white;
            border: none;
            padding: 15px 25px;
            border-radius: 8px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            transition: all 0.3s;
            display: block;
            width: 100%;
            box-shadow: 0 5px 15px rgba(102, 126, 234, 0.2);
        }
        
        button:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
        }
        
        .error {
            background: #ffecec;
            color: #e74c3c;
            padding: 15px;
            border-radius: 8px;
            margin: 20px 0;
            display: <?php echo empty($error) ? 'none' : 'block'; ?>;
            border-left: 4px solid #e74c3c;
        }
        
        .error i {
            margin-right: 8px;
        }
        
        .password-toggle {
            position: absolute;
            right: 15px;
            top: 50%;
            transform: translateY(-50%);
            cursor: pointer;
            color: #999;
        }
        
        .register-button {
            background: transparent;
            color: #667eea;
            border: 2px solid #667eea;
            padding: 10px 15px;
            border-radius: 8px;
            cursor: pointer;
            font-size: 14px;
            font-weight: 600;
            transition: all 0.3s;
            display: block;
            width: auto;
            margin: 20px auto 0;
            text-align: center;
            text-decoration: none;
            box-shadow: none;
        }
        
        .register-button:hover {
            background: #667eea;
            color: white;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(102, 126, 234, 0.2);
        }
        
        footer {
            margin-top: 40px;
            text-align: center;
            color: rgba(255, 255, 255, 0.8);
            font-size: 14px;
            width: 100%;
        }
        
        @media (max-width: 600px) {
            .login-container {
                padding: 25px;
            }
            
            h1 {
                font-size: 1.8rem;
            }
            
            input[type="text"],
            input[type="password"] {
                padding: 12px 15px 12px 40px;
            }
            
            button {
                padding: 12px 20px;
            }
        }