*{box-sizing:border-box}:root{--bg: #f4f6fa;--card: #ffffff;--text: #1d2433;--muted: #68738a;--border: #dfe4ee;--primary: #2563eb;--primary-soft: #e8effd;--success: #16a34a;--highlight: #fff7e0;--radius: 12px}@media(prefers-color-scheme:dark){:root{--bg: #12151c;--card: #1b202b;--text: #e8ecf4;--muted: #97a1b5;--border: #2c3444;--primary: #5b8cff;--primary-soft: #21304d;--highlight: #3a3320}}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text)}.app{max-width:900px;margin:0 auto;padding:0 16px 64px}.login-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:16px}.login-card{width:100%;max-width:380px;text-align:center}.login-card h1{margin:0 0 4px;font-size:26px}.login-card 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#dc2626;border-radius:999px;padding:0 6px;text-decoration:none;display:inline-block}.assistant-panel{position:fixed;top:0;right:0;bottom:0;width:400px;max-width:100vw;background:var(--card);border-left:1px solid var(--border);display:flex;flex-direction:column;z-index:100;box-shadow:-8px 0 24px #00000014}.app.with-assistant{margin-right:400px;max-width:none;padding-left:24px;padding-right:424px}@media(min-width:1350px){.app.with-assistant{max-width:900px;margin:0 auto;padding-right:16px}}.assistant-header{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-bottom:1px solid var(--border)}.assistant-header h3{margin:0;font-size:16px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.assistant-header-actions{display:flex;gap:2px;flex-shrink:0}.icon-btn.active{background:var(--primary-soft)}.history-item{display:flex;align-items:center;gap:8px;border:1px solid var(--border);border-radius:10px;padding:10px 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