/* One grid owns toolbar sizing at every width; controls never wrap individually. */
#mainToolbar{
  --orb-logo-height:34px;
  display:grid;grid-template-columns:auto minmax(0,1fr) 268px 146px;
  grid-template-rows:auto;gap:12px;align-items:center;
  height:auto;min-height:72px;padding:10px 14px;flex:0 0 auto;
}
#mainToolbar>.brand-mark{grid-area:1/1;margin:0;justify-self:start}
#mainToolbar>.topTools{
  grid-area:1/2;display:grid;grid-template-columns:minmax(0,6fr) minmax(0,8fr) minmax(0,3.3fr);
  gap:10px;align-items:stretch;min-width:0;width:100%;margin:0;padding:0;order:0;
}
#mainToolbar .quickGroup,#mainToolbar .toolbarPanel{
  display:grid;grid-template-rows:12px 34px;gap:5px;min-width:0;width:100%;
  margin:0;padding:0;align-items:stretch;justify-content:normal;
}
#mainToolbar .quickLabel,#mainToolbar .toolbarLabel{
  display:block;margin:0;padding:0;font-size:9px;line-height:12px;
  letter-spacing:.1em;text-transform:uppercase;font-weight:500;color:var(--graphite);white-space:nowrap;opacity:.8;
}
#mainToolbar .quickSeg{display:flex;align-items:stretch;min-width:0;width:100%;height:34px;flex:none}
#mainToolbar .quickSeg button{
  flex:1 1 0;min-width:0;width:0;height:32px;min-height:0;
  padding:0 3px;font-size:10px;letter-spacing:0;white-space:nowrap;
}
#mainToolbar #lightingPresetToggle{width:100%;min-width:0;padding:0 4px;font-size:10px}
#mainToolbar>.toolbarOutput{grid-area:1/3;min-width:0}
#mainToolbar>.toolbarUtility{grid-area:1/4;min-width:0}
#mainToolbar .topActions{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));align-items:stretch;
  width:100%;min-width:0;margin:0;gap:0;grid-area:auto;justify-self:stretch;
}
#mainToolbar .topAction{
  width:100%;min-width:0;height:34px;min-height:0;padding:0 3px;
  margin:0;font-size:9px;letter-spacing:0;white-space:nowrap;
}
#mainToolbar .topAction+.topAction{border-left:0}
#mainToolbar .toolbarUtilityControls{display:grid;grid-template-columns:34px minmax(0,1fr);gap:6px;min-width:0}
#mainToolbar .helpBtn{grid-area:auto;margin:0;width:34px;height:34px;min-height:0}
#mainToolbar .themeToggle{grid-area:auto;margin:0;width:100%;height:34px;min-width:0}
#mainToolbar button:focus-visible{outline:2px solid var(--ink);outline-offset:2px;z-index:1}

/* App actions occupy row one; preview modules fill row two edge to edge. */
@media(max-width:1599px){
  #mainToolbar{grid-template-columns:auto minmax(0,1fr) 146px;grid-template-rows:auto auto;gap:10px 14px}
  #mainToolbar>.toolbarOutput{grid-area:1/2}
  #mainToolbar>.toolbarUtility{grid-area:1/3}
  #mainToolbar>.topTools{grid-area:2/1/3/-1;grid-template-columns:minmax(0,6fr) minmax(0,8fr) minmax(0,3.3fr);gap:10px}
}

/* Eight direct lighting choices remain a complete module. */
#mainToolbar #toolbarLighting{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));height:34px}
#mainToolbar #toolbarLighting button{width:100%;min-width:0;padding:0 2px;font-size:9px}
#mainToolbar .topActions{grid-template-columns:minmax(0,1.3fr) repeat(2,minmax(0,1fr))}
@media(min-width:601px) and (max-width:1099px){
 #mainToolbar>.topTools{grid-template-columns:minmax(0,6fr) minmax(0,5.4fr) minmax(0,3.3fr)}
 #mainToolbar .quickGroup{grid-template-rows:12px 68px}
 #mainToolbar .quickSeg{height:68px;align-items:stretch}
 #mainToolbar .quickSeg button{height:66px}
 #mainToolbar #toolbarLighting{height:68px;grid-template-columns:repeat(4,minmax(0,1fr));grid-template-rows:repeat(2,33px)}
 #mainToolbar #toolbarLighting button{height:33px}
 #mainToolbar #toolbarLighting button:nth-child(-n+4){border-bottom:1px solid var(--rule)}
 #mainToolbar #toolbarLighting button:nth-child(4){border-right:0}
}
@media(min-width:601px) and (max-width:799px){
 #mainToolbar>.topTools{grid-template-columns:minmax(0,6fr) minmax(0,5.4fr) minmax(0,3.3fr)}
 #mainToolbar #segView{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-template-rows:repeat(2,33px)}
 #mainToolbar #segView button{width:100%;height:33px}
 #mainToolbar #segView button:nth-child(-n+3){border-bottom:1px solid var(--rule)}
 #mainToolbar #segView button:nth-child(3){border-right:0}

}
/* Compact pointer layout; each button stays at or below the wordmark height. */
@media(min-width:601px){
 #mainToolbar{min-height:0;padding-top:8px;padding-bottom:8px}
 #mainToolbar .quickGroup,#mainToolbar .toolbarPanel{grid-template-rows:12px 26px;gap:4px}
 #mainToolbar .quickSeg,#mainToolbar #toolbarLighting{height:26px;align-self:center}
 #mainToolbar .quickSeg button{height:24px}
 #mainToolbar .topAction,#mainToolbar .helpBtn,#mainToolbar .themeToggle{height:26px}
 #mainToolbar .helpBtn{width:26px}
 #mainToolbar .toolbarUtilityControls{grid-template-columns:26px minmax(0,1fr)}
}
@media(min-width:601px) and (max-width:1099px){
 #mainToolbar .quickGroup{grid-template-rows:12px 50px}
 #mainToolbar #toolbarLighting{height:50px;grid-template-rows:repeat(2,24px)}
 #mainToolbar #toolbarLighting button{height:24px}
}
@media(min-width:601px) and (max-width:799px){
 #mainToolbar #segView{height:50px;grid-template-rows:repeat(2,24px)}
 #mainToolbar #segView button{height:24px}
}

/* Mobile: visible modules, compact controls, and intentional full-width rows. */
@media(max-width:600px){
 #mainToolbar{grid-template-columns:var(--orb-logo-height) minmax(0,1fr);grid-template-rows:auto auto auto;padding:6px 10px 8px;gap:4px 12px;min-height:0}
 #mainToolbar>.brand-mark{grid-area:1/1;min-height:var(--orb-logo-height);align-self:center}
 #mainToolbar>.toolbarUtility{grid-area:1/2;width:146px;justify-self:end}
 #mainToolbar>.toolbarOutput{grid-area:2/1/3/-1}
 #mainToolbar>.topTools{grid-area:3/1/4/-1;grid-template-columns:minmax(0,1fr);gap:4px}
 #mainToolbar .quickGroup,#mainToolbar .toolbarPanel{display:grid;grid-template-columns:46px minmax(0,1fr);grid-template-rows:26px;gap:6px;align-items:center}
 #mainToolbar .quickSeg,#mainToolbar #toolbarLighting{height:26px}
 #mainToolbar .quickSeg button{height:24px;font-size:10px;padding:0 2px}
 #mainToolbar .quickLighting{grid-template-rows:50px}
 #mainToolbar #toolbarLighting{height:50px;grid-template-columns:repeat(4,minmax(0,1fr));grid-template-rows:repeat(2,24px)}
 #mainToolbar #toolbarLighting button{height:24px;font-size:10px}
 #mainToolbar #toolbarLighting button:nth-child(-n+4){border-bottom:1px solid var(--rule)}
 #mainToolbar #toolbarLighting button:nth-child(4){border-right:0}
 #mainToolbar .topAction,#mainToolbar .helpBtn,#mainToolbar .themeToggle{height:26px;font-size:10px}
 #mainToolbar .toolbarUtilityControls{grid-template-columns:26px minmax(0,1fr);gap:6px}
 #mainToolbar .helpBtn{width:26px}
 #mainToolbar .topActions .presentSplit{grid-template-columns:minmax(0,1fr) 26px}
 #mainToolbar .quickLabel,#mainToolbar .toolbarLabel{font-size:8px;letter-spacing:.04em;line-height:12px}
 #mainToolbar #toolbarUtilityPanel{grid-template-columns:minmax(0,1fr);grid-template-rows:26px}
 #mainToolbar #toolbarUtilityPanel>.toolbarLabel{display:none}
}
@media(max-width:360px){
 #mainToolbar #segView button,#mainToolbar .topAction{font-size:9px}
}

/* Keep fabric matching in the existing Interface heading, beside its theme controls. */
#mainToolbar .interface-heading{display:flex;align-items:center;justify-content:space-between;gap:4px;opacity:1}
#mainToolbar .interface-heading .check-option{display:inline-flex;align-items:center;gap:3px;margin:0;font-size:9px;line-height:12px;letter-spacing:0;text-transform:none;white-space:nowrap;cursor:pointer}
#mainToolbar .interface-heading input{appearance:auto;width:11px;height:11px;margin:0;cursor:pointer}
@media(max-width:600px){
 #mainToolbar #toolbarUtilityPanel{grid-template-rows:12px 26px;gap:3px}
 #mainToolbar #toolbarUtilityPanel>.interface-heading{display:flex}
}