:root{--bg:#0b0e13;--surface:#141a23;--surface-2:#1c2430;--border:#26303f;--text:#f4f7fb;--muted:#8b95a7;--accent:#35d07f;--accent-ink:#06281a;--danger:#ff5d5d;--radius:16px}*{box-sizing:border-box}body,html{margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;-webkit-font-smoothing:antialiased;min-height:100dvh}a{color:inherit}button{cursor:pointer}button,input,textarea{font:inherit}.shell{max-width:560px;margin:0 auto;min-height:100dvh;display:flex;flex-direction:column;padding:0 16px}.topbar{display:flex;align-items:center;gap:12px;padding:18px 0 12px;position:-webkit-sticky;position:sticky;top:0;background:linear-gradient(var(--bg) 75%,transparent);z-index:10}.topbar img{height:26px;display:block}.topbar .back{background:var(--surface);border:1px solid 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