:root{--bg:#fff;--panel:#fff;--panel-muted:#f6f7f9;--ink:#171717;--muted:#69707a;--line:#e4e7ec;--accent:#2563eb;--accent-strong:#1d4ed8;--danger:#c2410c;--focus:#fde68a;--bubble-user:#eaf2ff;--bubble-ai:#f4f5f7;--shadow:0 10px 30px #0f172a14}*{box-sizing:border-box}html,body{height:100%}body{background:var(--bg);color:var(--ink);margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}button,textarea,input{font:inherit}button{cursor:pointer;border:0}button:disabled{cursor:not-allowed;opacity:.58}.app-shell{background:var(--bg);min-height:100dvh}.auth-screen{background:var(--bg);place-items:center;min-height:100dvh;padding:24px;display:grid}.auth-panel{border:1px solid var(--line);width:min(100%,390px);box-shadow:var(--shadow);background:#fff;border-radius:8px;gap:14px;padding:20px;display:grid}.auth-panel h1{margin:0;font-size:22px}.auth-input{border:1px solid var(--line);border-radius:8px;width:100%;min-height:42px;padding:0 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