:root{--bg: #0a0a0b;--bg-elev: #131316;--bg-card: #18181c;--accent: #7c3aed;--accent-2: #a855f7;--text: #f4f4f5;--muted: #8b8b93;--border: #26262c;--danger: #ef4444;--success: #22c55e;--radius: 14px}*{box-sizing:border-box;margin:0;padding:0}html,body{background:var(--bg);color:var(--text);font-family:-apple-system,Segoe UI,Roboto,Arial,sans-serif;font-weight:600;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{font-family:inherit;font-weight:700;cursor:pointer;border:none}input,textarea,select{font-family:inherit;font-weight:600}.app{max-width:640px;margin:0 auto;min-height:100vh;display:flex;flex-direction:column}.topbar{position:sticky;top:0;z-index:20;background:#0a0a0beb;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--border);padding:14px 16px;display:flex;align-items:center;justify-content:space-between}.brand{font-size:19px;letter-spacing:1px}.brand 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