:root{--background:#eee9df;--shell:#f2eee5;--panel:#faf8f2;--canvas:#f4f1e9;--field:#fff;--ink:#33302a;--muted:#837d6f;--quiet:#a29a88;--line:#e0dacd;--line-soft:#ece6d9;--accent:#6e7a6b;--accent-deep:#4d5a4b;--accent-soft:#eceee8;--radius:12px;--font-ui:"IBM Plex Sans", "Avenir Next", "Segoe UI", sans-serif;--font-mono:"IBM Plex Mono", "SFMono-Regular", Consolas, monospace}*{box-sizing:border-box}html,body{min-height:100%;margin:0}body{background:var(--background);color:var(--ink);font-family:var(--font-ui);padding:38px}button,input,select{font:inherit}button{color:inherit}.app-shell{background:var(--shell);border:1px solid #ded8ca;border-radius:15px;max-width:1360px;min-height:calc(100vh - 76px);margin:0 auto;overflow:hidden;box-shadow:0 24px 60px #3c322321}.topbar{background:var(--panel);border-bottom:1px solid var(--line-soft);align-items:stretch;gap:16px;padding:20px 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