/* App shell and top bar */
/* ---------- layout ---------- */
#app{min-height:100vh;min-height:100dvh;display:flex;flex-direction:column}
.screen{flex:1;display:flex;flex-direction:column;animation:fadeIn .4s var(--ease)}
.wrap{width:100%;max-width:1120px;margin:0 auto;padding:0 20px}

.topbar{position:sticky;top:0;z-index:20;backdrop-filter:saturate(1.4) blur(14px);-webkit-backdrop-filter:saturate(1.4) blur(14px);background:color-mix(in srgb,var(--bg) 72%,transparent);border-bottom:1px solid var(--border)}
.topbar .wrap{height:60px;display:flex;align-items:center;gap:12px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;letter-spacing:-.02em;font-size:15px}
.mark{width:28px;height:28px;border-radius:8px;display:grid;place-items:center;font-size:14px;font-weight:800;color:#fff;background:linear-gradient(135deg,var(--accent),var(--accent-2))}
.brand-text{display:none}
@media (min-width:640px){.brand-text{display:inline}}
.spacer{flex:1}
.chip{display:inline-flex;align-items:center;gap:8px;height:32px;padding:0 12px;border-radius:999px;border:1px solid var(--border);background:var(--surface);font-size:13px;font-weight:600}
.chip .k{color:var(--muted);font-weight:500}
.chip .code{letter-spacing:.14em}