:root{--bg: #ffffff;--bg-secondary: #f4f4f5;--bg-tertiary: #e4e4e7;--border: #e2e8f0;--text: #0f172a;--text-muted: #64748b;--text-subtle: #94a3b8;--primary: #6366f1;--primary-hover: #4f46e5;--primary-light: #eef2ff;--success: #10b981;--success-light: #d1fae5;--warning: #f59e0b;--danger: #ef4444;--danger-light: #fee2e2;--sidebar-width: 240px;--topbar-height: 60px;--ai-panel-width: 320px;--font: system-ui, -apple-system, "Segoe UI", sans-serif;--radius: 8px;--radius-sm: 4px;--shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);--shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);--shadow-lg: 0 10px 15px rgba(0,0,0,.08), 0 4px 6px rgba(0,0,0,.05)}[data-theme=dark]{--bg: #0f0f13;--bg-secondary: #18181f;--bg-tertiary: #222229;--border: #2d2d3a;--text: #f1f5f9;--text-muted: #94a3b8;--text-subtle: #64748b;--primary: #818cf8;--primary-hover: #6366f1;--primary-light: #1e1b4b;--success: #34d399;--success-light: #064e3b;--shadow: 0 1px 3px rgba(0,0,0,.3);--shadow-md: 0 4px 6px rgba(0,0,0,.3);--shadow-lg: 0 10px 15px rgba(0,0,0,.4)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%;font-family:var(--font);color:var(--text);background:var(--bg);font-size:14px;line-height:1.5;-webkit-font-smoothing:antialiased}a{color:var(--primary);text-decoration:none}button{cursor:pointer;font-family:inherit}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-subtle)}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg-secondary)}.login-card{background:var(--bg);border:1px solid var(--border);border-radius:16px;padding:48px 40px;width:100%;max-width:400px;box-shadow:var(--shadow-lg)}.login-logo{text-align:center;margin-bottom:32px}.login-logo h1{font-size:28px;font-weight:700;color:var(--text);letter-spacing:-.5px}.login-logo p{color:var(--text-muted);margin-top:6px;font-size:14px}.login-form{display:flex;flex-direction:column;gap:16px}.form-group{display:flex;flex-direction:column;gap:6px}.form-group label{font-size:13px;font-weight:500;color:var(--text-muted);letter-spacing:.3px}.form-group input{padding:10px 14px;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg);color:var(--text);font-size:14px;transition:border-color .15s,box-shadow .15s;outline:none}.form-group input:focus{border-color:var(--primary);box-shadow:0 0 0 3px #6366f11f}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 16px;border:none;border-radius:var(--radius);font-size:14px;font-weight:500;transition:all .15s;white-space:nowrap}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-hover)}.btn-primary:active{transform:translateY(1px)}.btn-secondary{background:var(--bg-secondary);color:var(--text);border:1px solid var(--border)}.btn-secondary:hover{background:var(--bg-tertiary)}.btn-ghost{background:transparent;color:var(--text-muted);border:none;padding:6px 10px}.btn-ghost:hover{background:var(--bg-secondary);color:var(--text)}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover{opacity:.9}.btn-sm{padding:6px 12px;font-size:13px}.btn-xs{padding:4px 8px;font-size:12px}.btn-full{width:100%}.btn:disabled{opacity:.5;cursor:not-allowed}.login-error{background:var(--danger-light);color:var(--danger);padding:10px 14px;border-radius:var(--radius);font-size:13px}.studio{display:flex;flex-direction:column;height:100vh;overflow:hidden}.topbar{height:var(--topbar-height);background:var(--bg);border-bottom:1px solid var(--border);display:flex;align-items:center;padding:0 16px;gap:12px;flex-shrink:0;z-index:100}.topbar-logo{font-size:18px;font-weight:700;color:var(--text);display:flex;align-items:center;gap:6px;white-space:nowrap}.topbar-divider{width:1px;height:24px;background:var(--border)}.task-select{padding:6px 10px;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg);color:var(--text);font-size:13px;cursor:pointer;max-width:200px}.branch-badge{display:inline-flex;align-items:center;gap:4px;padding:3px 10px;background:var(--primary-light);color:var(--primary);border-radius:20px;font-size:12px;font-weight:500;font-family:SF Mono,Fira Code,monospace}.topbar-spacer{flex:1}.topbar-actions{display:flex;align-items:center;gap:8px}.user-avatar{width:32px;height:32px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;cursor:pointer;flex-shrink:0}.studio-body{display:flex;flex:1;overflow:hidden}.sidebar{width:var(--sidebar-width);background:var(--bg-secondary);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden;transition:width .2s ease;flex-shrink:0}.sidebar.collapsed{width:0}.sidebar-section{padding:12px 8px 6px;font-size:11px;font-weight:600;color:var(--text-subtle);text-transform:uppercase;letter-spacing:.8px}.sidebar-scroll{flex:1;overflow-y:auto;overflow-x:hidden}.file-tree{padding:4px 0}.file-item{display:flex;align-items:center;gap:6px;padding:4px 12px;cursor:pointer;border-radius:var(--radius-sm);color:var(--text-muted);font-size:13px;-webkit-user-select:none;user-select:none;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;transition:background .1s}.file-item:hover{background:var(--bg-tertiary);color:var(--text)}.file-item.active{background:var(--primary-light);color:var(--primary)}.file-item.dir{font-weight:500}.file-icon{font-size:14px;flex-shrink:0}.file-children{padding-left:16px}.online-users{padding:8px 12px}.online-user-item{display:flex;align-items:center;gap:8px;padding:5px 0;font-size:12px;color:var(--text-muted)}.online-dot{width:8px;height:8px;border-radius:50%;background:var(--success);flex-shrink:0;box-shadow:0 0 0 2px var(--success-light)}.online-user-file{color:var(--text-subtle);font-size:11px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.editor-area{flex:1;display:flex;flex-direction:column;overflow:hidden;background:var(--bg)}.tab-bar{display:flex;border-bottom:1px solid var(--border);background:var(--bg-secondary);overflow-x:auto;flex-shrink:0}.tab{display:flex;align-items:center;gap:6px;padding:8px 16px;border-right:1px solid var(--border);cursor:pointer;font-size:13px;color:var(--text-muted);white-space:nowrap;transition:background .1s;min-width:120px;max-width:200px}.tab:hover{background:var(--bg);color:var(--text)}.tab.active{background:var(--bg);color:var(--text);border-bottom:2px solid var(--primary)}.tab-close{margin-left:auto;width:18px;height:18px;border-radius:3px;display:flex;align-items:center;justify-content:center;font-size:14px;color:var(--text-subtle);flex-shrink:0}.tab-close:hover{background:var(--bg-tertiary);color:var(--text)}.editor-container{flex:1;overflow:hidden;position:relative}.editor-placeholder{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;color:var(--text-subtle);gap:12px}.editor-placeholder h2{font-size:18px;color:var(--text-muted)}.editor-placeholder p{font-size:14px}.ai-panel{width:var(--ai-panel-width);border-left:1px solid var(--border);display:flex;flex-direction:column;background:var(--bg);transition:width .2s ease;flex-shrink:0;overflow:hidden}.ai-panel.collapsed{width:0}.ai-panel-header{padding:12px 16px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;flex-shrink:0}.ai-panel-header h3{font-size:14px;font-weight:600;display:flex;align-items:center;gap:6px}.model-select{padding:4px 8px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg);color:var(--text);font-size:12px;cursor:pointer}.ai-messages{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:12px}.ai-message{display:flex;gap:10px;font-size:13px;line-height:1.6}.ai-message-avatar{width:28px;height:28px;border-radius:6px;display:flex;align-items:center;justify-content:center;font-size:14px;flex-shrink:0;margin-top:2px}.ai-message.user .ai-message-avatar{background:var(--primary)}.ai-message.assistant .ai-message-avatar{background:var(--bg-secondary)}.ai-message-content{flex:1;overflow:hidden}.ai-message.user .ai-message-content{background:var(--primary);color:#fff;padding:10px 14px;border-radius:12px 12px 4px}.ai-message.assistant .ai-message-content{background:var(--bg-secondary);padding:10px 14px;border-radius:12px 12px 12px 4px}.ai-message pre{background:var(--bg-tertiary);padding:10px;border-radius:var(--radius-sm);overflow-x:auto;margin:8px 0;font-size:12px;font-family:SF Mono,Fira Code,monospace}.ai-message code{font-family:SF Mono,Fira Code,monospace;font-size:12px;background:var(--bg-tertiary);padding:1px 5px;border-radius:3px}.ai-message.assistant .ai-message-content code{background:var(--bg)}.ai-input-area{padding:12px;border-top:1px solid var(--border);display:flex;flex-direction:column;gap:8px;flex-shrink:0}.ai-no-key{padding:12px;background:var(--bg-secondary);border-radius:var(--radius);font-size:12px;color:var(--text-muted);text-align:center}.ai-input-row{display:flex;gap:8px;align-items:flex-end}.ai-textarea{flex:1;padding:10px 14px;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg);color:var(--text);font-size:13px;resize:none;min-height:64px;max-height:200px;font-family:inherit;outline:none;transition:border-color .15s;line-height:1.5}.ai-textarea:focus{border-color:var(--primary)}.ai-typing{display:inline-flex;align-items:center;gap:4px;padding:10px 14px;background:var(--bg-secondary);border-radius:12px}.ai-typing-dot{width:6px;height:6px;border-radius:50%;background:var(--text-subtle);animation:typing 1.4s infinite}.ai-typing-dot:nth-child(2){animation-delay:.2s}.ai-typing-dot:nth-child(3){animation-delay:.4s}@keyframes typing{0%,60%,to{opacity:.3;transform:translateY(0)}30%{opacity:1;transform:translateY(-4px)}}.status-bar{height:28px;background:var(--primary);color:#ffffffe6;display:flex;align-items:center;padding:0 16px;gap:16px;font-size:12px;flex-shrink:0}.status-item{display:flex;align-items:center;gap:4px}.status-dot{width:7px;height:7px;border-radius:50%}.status-dot.green{background:#34d399}.status-dot.yellow{background:#fbbf24}.status-dot.red{background:#f87171}.activity-feed{position:fixed;bottom:40px;right:20px;z-index:1000;display:flex;flex-direction:column-reverse;gap:8px;pointer-events:none}.activity-toast{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:10px 14px;box-shadow:var(--shadow-md);font-size:13px;display:flex;align-items:center;gap:8px;animation:slideInRight .3s ease,fadeOut .3s ease 3.7s forwards;pointer-events:auto;max-width:300px}@keyframes slideInRight{0%{transform:translate(100%);opacity:0}to{transform:translate(0);opacity:1}}@keyframes fadeOut{to{opacity:0;transform:translate(20px)}}.toast-icon{font-size:16px}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;z-index:500;display:flex;align-items:center;justify-content:center}.modal{background:var(--bg);border-radius:12px;padding:28px;width:100%;max-width:440px;box-shadow:var(--shadow-lg)}.modal h2{font-size:18px;font-weight:600;margin-bottom:20px}.modal-form{display:flex;flex-direction:column;gap:14px}.modal-actions{display:flex;gap:8px;justify-content:flex-end;margin-top:8px}.diff-viewer{padding:16px;overflow:auto;height:100%;font-family:SF Mono,Fira Code,monospace;font-size:12px;line-height:1.6}.diff-line{padding:1px 8px}.diff-line.added{background:#10b9811a;color:var(--success)}.diff-line.removed{background:#ef44441a;color:var(--danger)}.diff-line.header{color:var(--primary);font-weight:600}.flex{display:flex}.gap-2{gap:8px}.flex-1{flex:1}.text-muted{color:var(--text-muted)}.text-sm{font-size:12px}.font-mono{font-family:SF Mono,Fira Code,monospace}.spinner{width:18px;height:18px;border:2px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .6s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.theme-toggle{width:32px;height:32px;border-radius:6px;border:1px solid var(--border);background:var(--bg-secondary);color:var(--text);font-size:16px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:background .15s}.theme-toggle:hover{background:var(--bg-tertiary)}.collapse-btn{width:24px;height:24px;border-radius:4px;border:1px solid var(--border);background:var(--bg-secondary);color:var(--text-muted);font-size:12px;display:flex;align-items:center;justify-content:center;cursor:pointer;flex-shrink:0}.collapse-btn:hover{background:var(--bg-tertiary)}.admin-section{padding:20px;max-width:800px;margin:0 auto}.admin-section h2{font-size:20px;font-weight:600;margin-bottom:20px}.users-table{width:100%;border-collapse:collapse;font-size:13px}.users-table th{text-align:left;padding:8px 12px;border-bottom:1px solid var(--border);color:var(--text-muted);font-weight:500}.users-table td{padding:10px 12px;border-bottom:1px solid var(--border)}.users-table tr:last-child td{border-bottom:none}.badge{display:inline-flex;padding:2px 8px;border-radius:20px;font-size:11px;font-weight:500}.badge-admin{background:var(--primary-light);color:var(--primary)}.badge-success{background:var(--success-light);color:var(--success)}.ai-key-section{padding:12px}.ai-key-section h4{font-size:13px;font-weight:600;margin-bottom:10px;color:var(--text-muted)}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px 20px;color:var(--text-subtle);gap:8px;text-align:center}.empty-state .emoji{font-size:36px}.empty-state p{font-size:13px}.new-task-btn{width:100%;padding:8px;border:1px dashed var(--border);border-radius:var(--radius);background:transparent;color:var(--text-muted);font-size:12px;cursor:pointer;margin-top:8px;transition:all .15s}.new-task-btn:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-light)}