Menu troubles

Hi
I use pinboard theme and i need some help. I din’t found somehting that can help me, sorry so i ask here…

On mobile phone, the collapsed menu is right on my logo. I search and found help on this page :

@media screen and (max-width: 480px) {
 #header {
  position: relative;
  padding-bottom: 30px;
 }
 #access {
  background: none;
 }
 #access,
 #access .nav-show,
 #access a.nav-show:hover {
  bottom: 0;
 }
 #access .nav-show,
 #access a.nav-show:hover {
  top: initial;
  left: 44%;
 }
 #access:target .menu {
  margin-top: 0;
 }
}

Trouble : logo is not clickable anymore. It’s my only link to home, how can i bring back it ?

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on mobile version, search bar is above menu when uncollapsed.
pic
How to fix this ?

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on mobile version, search bar is always uncollapsed.
How to fix this ?
pic

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Last one : how to reduce font size menu and submenu ?

My website
Thanks before for helping me