:root{--bg: #0f0f0f;--bg-secondary: #1a1a1a;--bg-tertiary: #252525;--bg-hover: #2a2a2a;--text: #e8e8e8;--text-secondary: #999;--text-muted: #666;--border: #333;--accent: #2563eb;--accent-hover: #1d4ed8;--accent-light: rgba(37, 99, 235, .15);--accent-alpha-08: rgba(37, 99, 235, .08);--accent-alpha-10: rgba(37, 99, 235, .1);--accent-alpha-15: rgba(37, 99, 235, .15);--accent-alpha-18: rgba(37, 99, 235, .18);--accent-alpha-20: rgba(37, 99, 235, .2);--success-alpha-10: rgba(52, 211, 153, .1);--success-alpha-25: rgba(52, 211, 153, .25);--error-alpha-10: rgba(248, 113, 113, .1);--error-alpha-15: rgba(248, 113, 113, .15);--user-bg: #2563eb;--user-text: #fff;--assistant-bg: #1e1e1e;--tool-bg: #111827;--tool-border: #1e3a5f;--success: #4ade80;--error: #f87171;--warning: #fbbf24;--radius: 12px;--radius-sm: 8px;--radius-xs: 6px;--sidebar-width: 280px;--font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono: "SF Mono", "Fira Code", "Consolas", 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.15s}.settings-nav-item:hover{background:var(--bg-hover);color:var(--text)}.settings-nav-item.active{background:var(--bg-secondary);color:var(--text);font-weight:600}.settings-content{flex:1;min-width:0;max-width:640px}.admin-page .settings-content{max-width:none}.settings-tab{display:flex;flex-direction:column;gap:32px}.settings-section{display:flex;flex-direction:column;gap:16px}.settings-section-title{font-size:16px;font-weight:600;padding-bottom:8px;border-bottom:1px solid var(--border)}.settings-field{display:flex;flex-direction:column;gap:6px}.settings-field label{font-size:13px;font-weight:500;color:var(--text-secondary)}.settings-field input[type=password],.settings-field input[type=text]{padding:10px 12px;background:var(--bg-secondary);color:var(--text);border:1px solid var(--border);border-radius:var(--radius-sm);font-size:14px;font-family:var(--font);outline:none;transition:border-color .15s}.settings-field input:focus{border-color:var(--accent)}.settings-field-actions{display:flex;align-items:center;gap:12px;margin-top:4px}.settings-token-status{font-size:13px;color:var(--text-muted)}.settings-token-status.has-token{color:var(--success)}.settings-save-btn{padding:6px 16px;font-size:13px;font-family:var(--font);background:var(--accent);color:#fff;border:none;border-radius:var(--radius-sm);cursor:pointer;transition:background .15s}.settings-save-btn:hover{background:var(--accent-hover)}.settings-save-btn:disabled{opacity:.6;cursor:not-allowed}.settings-field-error{font-size:13px;color:var(--error);min-height:0}.settings-field-error:empty{display:none}.account-plans-table-inner{width:100%;border-collapse:collapse;font-size:13px}.account-plans-table-inner th{text-align:left;padding:8px 12px;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.04em;color:var(--text-muted);border-bottom:1px solid var(--border)}.account-plans-table-inner td{padding:10px 12px;border-bottom:1px solid var(--border);color:var(--text)}.account-plans-table-inner tr:last-child td{border-bottom:none}.account-plans-table-inner tr.current-plan{background:var(--bg-tertiary)}.btn-plan-upgrade{background:#2563eb;color:#fff;border:none;border-radius:6px;padding:6px 16px;font-size:12px;font-weight:600;cursor:pointer;transition:opacity .15s}.btn-plan-upgrade:hover{opacity:.85}.plan-current-label{font-size:11px;color:var(--text-muted);font-style:italic}.sub-status{font-size:13px;color:var(--text-secondary);margin-top:12px}.sub-status.sub-cancelled{color:var(--warning, #f59e0b)}.sub-status.sub-renewal-failed{color:var(--error, #ef4444);margin-bottom:8px}.btn-sub-cancel{margin-top:8px;background:none;border:1px solid var(--border);color:var(--text-secondary);border-radius:6px;padding:6px 16px;font-size:12px;cursor:pointer;transition:border-color .15s,color .15s}.btn-sub-cancel:hover{border-color:var(--error, #ef4444);color:var(--error, #ef4444)}.btn-sub-reactivate{margin-top:8px;background:#2563eb;color:#fff;border:none;border-radius:6px;padding:6px 16px;font-size:12px;font-weight:600;cursor:pointer;transition:opacity .15s}.btn-sub-reactivate:hover{opacity:.85}.transactions-table{margin-top:8px}.tx-status{display:inline-block;padding:2px 8px;border-radius:4px;font-size:11px;font-weight:600}.tx-completed{background:#4ade8026;color:#4ade80}.tx-pending{background:#facc1526;color:#facc15}.tx-failed{background:#ef444426;color:#ef4444}.tx-refunded{background:#94a3b826;color:#94a3b8}@media(max-width:768px){.app{display:flex;flex-direction:column}.sidebar{display:flex;flex-direction:column;width:var(--sidebar-width);position:fixed;left:0;top:0;bottom:0;z-index:100;transform:translate(-100%);background:var(--bg-secondary);border-right:1px solid var(--border)}.sidebar.open{transform:translate(0)}.sidebar-main{flex:1;min-height:0;grid-column:unset;grid-row:unset;border-right:none}.sidebar-footer{grid-column:unset;grid-row:unset;border-right:none}.chat-main{flex:1;min-height:0}.chat-area{grid-column:unset;grid-row:unset}.hamburger{display:block}.overlay{display:none;position:fixed;inset:0;background:#00000080;z-index:99}.overlay.visible{display:block}.message{max-width:95%}.admin-panel{grid-column:unset;grid-row:unset;padding:16px}.admin-stats{grid-template-columns:repeat(2,1fr)}.chat-area.empty{grid-column:unset;grid-row:unset}.drop-overlay{left:0}.settings-page{grid-column:unset;grid-row:unset;padding:16px}.settings-page-layout{flex-direction:column;gap:16px}.settings-nav{flex-direction:row;min-width:0;overflow-x:auto}.settings-nav-item{white-space:nowrap}}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}[data-theme=light] .hljs{background:var(--bg-tertiary)!important}.modal-overlay{display:none;position:fixed;inset:0;z-index:300;background:#000000b3;align-items:center;justify-content:center;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.modal-overlay.open{display:flex}.modal{background:var(--bg-secondary);border:1px solid var(--border);border-radius:16px;width:480px;max-width:90vw;max-height:85vh;overflow-y:auto;padding:32px;box-shadow:0 16px 48px #0006}.modal h2{font-size:20px;font-weight:700;margin-bottom:4px}.modal .modal-subtitle{font-size:13px;color:var(--text-secondary);margin-bottom:24px}.modal-field{margin-bottom:16px}.modal-field label{display:block;font-size:12px;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.04em;margin-bottom:6px}.toggle-label{display:flex;align-items:center;gap:8px;cursor:pointer;text-transform:none;font-size:14px;font-weight:500;color:var(--text)}.toggle-label input[type=checkbox]{width:18px;height:18px;accent-color:var(--accent);cursor:pointer;margin:0}.modal-field input,.modal-field select{width:100%;padding:10px 12px;background:var(--bg-tertiary);color:var(--text);border:1px solid var(--border);border-radius:var(--radius-sm);font-size:14px;font-family:var(--font);outline:none;transition:border-color .15s}.modal-field select{appearance:none;-webkit-appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%239ca3af' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:36px;cursor:pointer}.modal-field input:focus,.modal-field select:focus{border-color:var(--accent)}.presets-bar{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:12px}.presets-bar:empty{display:none}.preset-chip{display:inline-flex;align-items:center;gap:5px;padding:5px 10px;background:var(--bg-tertiary);border:1px solid var(--border);border-radius:16px;font-size:12px;color:var(--text-secondary);cursor:pointer;transition:all .15s;-webkit-user-select:none;user-select:none}.preset-chip:hover{background:#2563eb1a;border-color:#2563eb4d;color:var(--text)}.preset-chip.active{background:#2563eb1f;border-color:var(--accent);color:var(--accent)}.preset-chip .preset-provider{font-weight:600;font-size:11px;text-transform:uppercase;letter-spacing:.3px;opacity:.7}.preset-chip .preset-remove{font-size:14px;line-height:1;opacity:.4;margin-left:2px;transition:opacity .15s}.preset-chip .preset-remove:hover{opacity:1}.modal-field .field-hint{font-size:11px;color:var(--text-muted);margin-top:4px}.modal-field .field-hint a{color:var(--accent);text-decoration:none}.modal-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:24px}.modal-btn{padding:10px 24px;border-radius:var(--radius-sm);border:none;font-size:14px;font-weight:600;cursor:pointer;transition:background .15s}.modal-btn-primary{background:var(--accent);color:#fff}.modal-btn-primary:hover{background:var(--accent-hover)}.modal-btn-primary:disabled{opacity:.4;cursor:not-allowed}.modal-btn-secondary{background:var(--bg-tertiary);color:var(--text-secondary);border:1px solid var(--border)}.modal-btn-secondary:hover{background:var(--bg-hover)}.modal-steps{display:flex;gap:8px;margin-bottom:20px}.modal-step{flex:1;height:3px;background:var(--border);border-radius:2px;transition:background .2s}.modal-step.active{background:var(--accent)}.modal-step.done{background:var(--success)}.modal-error{display:none;padding:8px 12px;margin-top:12px;background:#f871711a;border:1px solid rgba(248,113,113,.2);border-radius:var(--radius-sm);font-size:13px;color:var(--error)}.modal-error.visible{display:block}.impersonation-banner{display:flex;align-items:center;justify-content:center;gap:12px;padding:8px 16px;background:#fbbf24;color:#1a1a1a;font-size:13px;font-weight:600;z-index:100;flex-shrink:0}.impersonation-banner #impersonation-stop{padding:4px 12px;border:1px solid rgba(0,0,0,.3);border-radius:var(--radius-xs);background:#ffffff4d;color:#1a1a1a;font-size:12px;font-weight:600;cursor:pointer;transition:background .15s}.impersonation-banner #impersonation-stop:hover{background:#ffffff80}