/* A full-width masthead keeps navigation visible without a vertical menu. */
.studio-shell{display:block;min-height:100vh}.masthead{position:sticky;top:0;z-index:10;background:rgba(9,11,16,.94);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}.masthead-top{min-height:73px;width:min(1330px,100%);margin:0 auto;padding:0 clamp(24px,5vw,72px);display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:28px}.masthead .wordmark{font-size:28px;line-height:.77;white-space:nowrap}.masthead-label{margin:0;color:var(--faint);font:13px/1 var(--caps);letter-spacing:.16em}.masthead-meta{display:flex;align-items:center;gap:16px;color:var(--muted);font:13px var(--caps);letter-spacing:.13em;white-space:nowrap}.masthead-meta i{font-style:normal;color:var(--gold)}.masthead-meta button{border:1px solid var(--line-white);background:none;color:var(--gold);width:28px;height:28px;border-radius:50%;cursor:pointer}.horizontal-nav{width:min(1330px,100%);margin:0 auto;padding:0 clamp(24px,5vw,72px);display:flex;gap:4px;overflow-x:auto;scrollbar-width:none}.horizontal-nav::-webkit-scrollbar{display:none}.horizontal-nav .nav-tab{flex:0 0 auto;text-align:center;padding:14px 13px 13px;border-radius:0;border-bottom:2px solid transparent;font-size:15px}.horizontal-nav .nav-tab.is-active{background:transparent;box-shadow:none;border-bottom-color:var(--gold);color:var(--gold-hi)}.stage{min-width:0}.topbar,.sidebar{display:none}@media(max-width:760px){.masthead-top{grid-template-columns:auto 1fr;gap:14px;min-height:62px}.masthead-label{display:none}.masthead-meta{justify-self:end}.masthead-meta span:first-child{display:none}.masthead .wordmark{font-size:24px}.horizontal-nav{padding:0 18px}.horizontal-nav .nav-tab{padding:11px 9px;font-size:14px}.horizontal-nav .nav-icon{display:none}.content{padding:33px 18px}}