unbind C-b
set-option -g prefix C-x
set -g base-index 1 # Windows
set -g default-terminal 'screen-256color'

bind-key -n C-h previous-window
bind-key -n C-l next-window

bind-key -n M-h select-pane -L
bind-key -n M-j select-pane -D
bind-key -n M-k select-pane -U
bind-key -n M-l select-pane -R