.page-header{display:block;box-sizing:border-box;flex:0 0 auto;padding:12px var(--ui-page-inset) 0;border-bottom:1px solid var(--ctor-bg-3);font-family:var(--ui-font)}.page-header:not(:has(.page-header__nav)){padding-bottom:12px}.page-header__main{display:flex;align-items:flex-start;gap:16px}.page-header__identity{flex:1 1 auto;min-width:0}.page-header__title{margin:0;color:var(--ctor-text);font-size:20px;font-weight:600;line-height:1.25;letter-spacing:.02em;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.page-header__sub{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:4px;min-height:18px}.page-header__subtitle{color:var(--ctor-text-dim);font-size:var(--ui-text-xs)}.page-header__meta{color:var(--ctor-text-faint);font-family:var(--ui-font-mono);font-size:11px;font-variant-numeric:tabular-nums}.page-header__actions{display:flex;flex:0 0 auto;align-items:center;gap:8px}.page-header__nav{display:flex;align-items:flex-end;gap:12px;margin-top:10px}.page-header__tabs{display:flex;flex:0 0 auto;gap:2px}.page-header__tab{margin-bottom:-1px;padding:6px 10px;border:none;border-bottom:2px solid transparent;color:var(--ctor-text-dim);background:none;font-family:var(--ui-font);font-size:var(--ui-text-xs);font-weight:600;cursor:pointer}.page-header__tab:hover{color:var(--ctor-text)}.page-header__tab--on{border-bottom-color:var(--ctor-accent);color:var(--ctor-text)}.page-header__tab-group{align-self:center;margin:0 4px 0 10px;padding-left:12px;border-left:1px solid var(--ctor-bg-3);color:var(--ctor-text-faint);font-size:var(--ui-text-xs);font-weight:500;letter-spacing:.04em;text-transform:uppercase}