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-3px;--z-topbar:50;--z-debug:60;--z-dropdown:70;--z-overlay:80;--container-width:min(1200px,calc(100% - 32px));--font-family-base:"Avenir Next","SF Pro Display","Segoe UI","Helvetica Neue",Arial,"PingFang SC","Noto Sans SC",sans-serif;--font-family-mono:"SF Mono","JetBrains Mono","Fira 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solid var(--focus-ring);outline-offset:2px}.app-shell{min-height:100vh;display:flex;flex-direction:column}.topbar{position:-webkit-sticky;position:sticky;top:0;z-index:var(--z-topbar);border-bottom:1px solid rgba(255,255,255,.1);background:color-mix(in srgb,var(--background) 88%,transparent);-webkit-backdrop-filter:blur(22px);backdrop-filter:blur(22px)}.footer-inner,.page-container,.topbar-inner{width:var(--container-width);margin:0 auto}.topbar-inner{min-height:72px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;grid-gap:20px;gap:20px;padding:12px 0}.brand-block{display:grid;grid-gap:3px;gap:3px}.brand{gap:10px}.brand,.brand-mark{display:inline-flex;align-items:center}.brand-mark{width:32px;height:32px;border-radius:10px;background:linear-gradient(135deg,#ffd000,#f0b90b 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