set -g default-terminal "st-256color"
set -ga terminal-overrides ",st-256color:Tc"

unbind C-b
unbind C-a
unbind Space
unbind C-Space
unbind r
unbind Tab

set -g prefix C-a
bind C-a send-prefix

bind-key C-a last-window
bind-key Space next-window
bind-key C-Space previous-window

bind-key Tab select-pane -t :.+ \; swap-pane -U

bind r source-file ~/.tmux.conf

# set inactive/active window styles
set -g window-style 'fg=colour247,bg=colour236'
set -g window-active-style 'fg=white,bg=black'

set-window-option -g xterm-keys on 
 
#pane border
set -g pane-border-bg colour235
set -g pane-border-fg colour238
set -g pane-active-border-bg colour236
set -g pane-active-border-fg colour51