:root{--bg-primary:#0a0e17;--bg-secondary:#111827;--bg-tertiary:#1a2236;--border:#1e293b;--text-primary:#e2e8f0;--text-secondary:#94a3b8;--text-muted:#64748b;--accent:#38bdf8;--accent-dim:rgba(56,189,248,.1);--danger:#ef4444;--warning:#f59e0b;--success:#22c55e;--user-bg:#1e3a5f;--ai-bg:#111827}*{margin:0;padding:0;box-sizing:border-box}body{font-family:JetBrains Mono,SF Mono,Fira Code,monospace;background:var(--bg-primary);color:var(--text-primary);min-height:100vh}.app{display:flex;flex-direction:column;height:100vh;overflow:hidden}.header{justify-content:space-between;padding:12px 24px;border-bottom:1px solid var(--border);background:var(--bg-secondary)}.header,.header-title{display:flex;align-items:center}.header-title{gap:12px}.header-title h1{font-size:14px;font-weight:600;color:var(--accent);letter-spacing:.5px}.header-badge{font-size:10px;padding:2px 8px;border-radius:4px;background:var(--accent-dim);color:var(--accent);border:1px solid rgba(56,189,248,.2)}.header-meta{font-size:11px;color:var(--text-muted)}.messages{flex:1 1;overflow-y:auto;padding:24px;scroll-behavior:smooth}.message{max-width:900px;margin:0 auto 24px;padding:16px 20px;border-radius:8px;font-size:13px;line-height:1.7}.message-user{background:var(--user-bg);border:1px solid rgba(56,189,248,.15);margin-left:60px}.message-assistant{background:var(--ai-bg);border:1px solid var(--border)}.message-role{font-size:10px;text-transform:uppercase;letter-spacing:1px;color:var(--text-muted);margin-bottom:8px}.message-role.user{color:var(--accent)}.message-role.assistant{color:var(--success)}.message-content h1,.message-content h2,.message-content h3{color:var(--accent);margin:16px 0 8px}.message-content h1{font-size:16px}.message-content h2{font-size:14px}.message-content h3{font-size:13px}.message-content p{margin-bottom:8px}.message-content code{background:rgba(0,0,0,.3);padding:1px 6px;border-radius:3px;font-size:12px;color:#7dd3fc}.message-content 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ul{margin:8px 0;padding-left:24px}.message-content li{margin-bottom:4px}.message-content strong{color:#f8fafc}.message-content blockquote{border-left:3px solid var(--accent);padding-left:12px;margin:8px 0;color:var(--text-secondary)}.input-area{padding:16px 24px;border-top:1px solid var(--border);background:var(--bg-secondary)}.input-wrapper{max-width:900px;margin:0 auto;display:flex;gap:12px;align-items:flex-end}.input-field{flex:1 1;background:var(--bg-tertiary);border:1px solid var(--border);border-radius:8px;padding:12px 16px;color:var(--text-primary);font-family:inherit;font-size:13px;resize:none;min-height:44px;max-height:200px;outline:none;transition:border-color .2s}.input-field:focus{border-color:var(--accent)}.input-field::placeholder{color:var(--text-muted)}.send-btn{background:var(--accent);color:var(--bg-primary);border:none;border-radius:8px;padding:12px 20px;font-family:inherit;font-size:12px;font-weight:600;cursor:pointer;letter-spacing:.5px;transition:opacity 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p{font-size:13px;color:var(--text-secondary);margin-bottom:32px;line-height:1.7}.welcome-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));grid-gap:12px;gap:12px;text-align:left}.welcome-card{padding:16px;border:1px solid var(--border);border-radius:8px;cursor:pointer;transition:all .2s}.welcome-card:hover{border-color:var(--accent);background:var(--accent-dim)}.welcome-card h3{font-size:12px;color:var(--accent);margin-bottom:6px;display:flex;align-items:center;gap:8px}.card-domain{font-size:9px;padding:2px 6px;border-radius:3px;background:rgba(56,189,248,.15);color:var(--accent);letter-spacing:.5px;flex-shrink:0}.welcome-card p{font-size:11px;color:var(--text-muted);margin:0;line-height:1.5}.header-right{display:flex;align-items:center;gap:16px}.usage-badge{font-size:11px;padding:4px 10px;border-radius:4px;background:var(--accent-dim);color:var(--accent);border:1px solid rgba(56,189,248,.2)}.user-info{display:flex;align-items:center;gap:10px;font-size:11px}.user-email{color:var(--text-muted)}.tier-badge{font-size:10px;padding:2px 8px;border-radius:4px;background:var(--accent-dim);color:var(--accent);text-transform:uppercase;letter-spacing:.5px}.logout-btn{background:transparent;border:1px solid var(--border);color:var(--text-muted);font-family:inherit;font-size:11px;padding:4px 10px;border-radius:4px;cursor:pointer;transition:all .2s}.logout-btn:hover{border-color:var(--danger);color:var(--danger)}.tier-error{padding:12px 24px;background:rgba(239,68,68,.1);border-bottom:1px solid rgba(239,68,68,.2);color:var(--danger);font-size:12px;text-align:center}.sn-connect-section{display:flex;align-items:center;gap:8px;flex-wrap:wrap;position:relative}.sn-connect-form{display:flex;align-items:center;gap:6px}.sn-url-input{font-family:inherit;font-size:11px;padding:4px 10px;border-radius:4px;border:1px solid var(--border);background:var(--bg-tertiary);color:var(--text-primary);width:260px;outline:none;transition:border-color .2s}.sn-url-input:focus{border-color:var(--success)}.sn-url-input::placeholder{color:var(--text-muted)}.sn-cancel-btn{font-size:10px;padding:4px 8px;border-radius:4px;border:1px solid var(--border);background:transparent;color:var(--text-muted);font-family:inherit;font-weight:600;letter-spacing:.5px;cursor:pointer;transition:all .2s}.sn-cancel-btn:hover{border-color:var(--text-secondary);color:var(--text-secondary)}.sn-instance-badge{font-size:10px;padding:2px 8px;border-radius:4px;background:rgba(34,197,94,.1);color:var(--success);border:1px solid rgba(34,197,94,.2);max-width:160px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.sn-disconnect-btn{font-size:10px;padding:4px 8px;border-radius:4px;border:1px solid var(--border);background:transparent;color:var(--text-muted);font-family:inherit;font-weight:600;letter-spacing:.5px;cursor:pointer;transition:all 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