.btn {
  font-family: 'Rajdhani', sans-serif;
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 7px 16px;
  border-radius: 3px;
  border: 1px solid var(--border-bright);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s;
}
.btn:hover { border-color: var(--accent-dim); color: var(--accent); background: rgba(126,200,232,0.06); }
.btn.primary { border-color: var(--accent); color: var(--accent); }
.btn.primary:hover { background: rgba(126,200,232,0.16); }
.btn:disabled { opacity: 0.6; cursor: default; }

.app {
  position: relative;
  z-index: 1;
  display: flex;
  /* Header layout height is --header-bar-height (zoom paints inside it; do not double-count --ui-scale). */
  height: calc(100vh - var(--header-bar-height));
  min-height: 0;
  transform-origin: top left;
}