.site-header {
  box-sizing: border-box;
  display: grid;
  grid-template-columns: minmax(160px, 1fr) auto minmax(160px, 1fr);
  align-items: center;
  gap: 20px;
  width: 100%;
  min-height: 64px;
  padding: 0 30px;
  background: var(--bg-canvas, #fff);
  border-bottom: 1px solid var(--border-subtle, #e0e4ed);
  color: var(--text-primary, #172033);
  position: relative;
  z-index: 30;
}
.site-header__identity, .site-header__actions { display: flex; align-items: center; gap: 12px; }
.site-header .site-header__brand { color: #7760db; font-size: 18px; font-weight: 900; letter-spacing: -.04em; text-decoration: none; white-space: nowrap; }
.site-header__nav { display: flex; align-items: center; justify-content: center; gap: 16px; }
.site-header .site-header__nav a { color: var(--text-secondary, #475569); font-size: 13px; font-weight: 700; letter-spacing: .06em; text-decoration: none; white-space: nowrap; }
.site-header .site-header__nav a:is(.active, :hover, [aria-current="page"]) { color: #7760db; }
.site-header__actions { justify-content: flex-end; }
.site-header .icon-button, .site-header .static-icon-button { display: inline-flex; align-items: center; justify-content: center; flex: 0 0 34px; width: 34px; height: 34px; min-height: 34px; padding: 0; border: 0; border-radius: 8px; background: transparent; box-shadow: none; color: var(--text-muted, #64748b); cursor: pointer; }
.site-header :is(.icon-button, .static-icon-button) svg { width: 19px; height: 19px; }
.site-header :is(a,button):focus-visible { outline: 2px solid #7760db; outline-offset: 4px; }
html[data-theme="dark"] .site-header { background: var(--bg-canvas, #111827); border-color: var(--border-subtle, #334155); color: #f8fafc; }
html[data-theme="dark"] .site-header__nav a { color: var(--text-secondary, #cbd5e1); }
@media(max-width: 760px) {
  .site-header { grid-template-columns: 1fr auto; gap: 8px; padding: 12px 16px; }
  .site-header__nav { grid-column: 1 / -1; grid-row: 2; flex-wrap: wrap; gap: 16px; padding: 6px 0 0; }
  .site-header__actions { grid-column: 2; grid-row: 1; gap: 4px; }
  .site-header .site-header__nav a { font-size: 12px; letter-spacing: 0; }
}