/* Layout */
.app-shell{
  height: 100%;
  display: grid;
  grid-template-rows: auto 1fr;
}

.topbar{
  display:flex;
  gap: var(--gap);
  align-items:center;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.65);
  backdrop-filter: blur(8px);
}

.topbar .brand{
  display:flex;
  align-items:center;
  gap: 10px;
  min-width: 220px;
}
.topbar img{ height: 26px; width: auto; }

.main{
  display: grid;
  grid-template-columns: 280px 360px 1fr;
  gap: var(--gap);
  padding: var(--gap);
  min-height: 0;
}

.panel{
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  min-height: 0;
  overflow: hidden;
  display:flex;
  flex-direction: column;
}

.panel-header{
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 8px;
}

.panel-body{
  padding: 10px 12px;
  overflow: auto;
  min-height: 0;
}

@media (max-width: 1050px){
  .main{ grid-template-columns: 1fr; }
}