:root{--primary:#1a73e8;--primary-hover:#1557b0;--bg:#f8f9fa;--surface:#fff;--text:#202124;--text-secondary:#5f6368;--border:#dadce0;--hover:#f1f3f4;--selected:#e8f0fe;--danger:#d93025;--success:#1e8e3e;--sidebar-width:280px}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);height:100vh;font-family:Google Sans,Segoe UI,Roboto,Arial,sans-serif;overflow:hidden}#root{flex-direction:column;height:100vh;display:flex}button{cursor:pointer;background:0 0;border:none;font-family:inherit;font-size:14px}input,textarea{font-family:inherit;font-size:14px}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:#c1c1c1;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#a1a1a1}.login-container{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);justify-content:center;align-items:center;height:100vh;display:flex}.login-card{background:var(--surface);border-radius:16px;width:420px;padding:48px;box-shadow:0 4px 28px #0000001f}.login-card h1{text-align:center;color:var(--text);margin-bottom:8px;font-size:24px;font-weight:400}.login-card .subtitle{text-align:center;color:var(--text-secondary);margin-bottom:32px;font-size:14px}.login-card .logo{text-align:center;margin-bottom:24px;font-size:48px}.form-group{margin-bottom:20px}.form-group label{color:var(--text-secondary);margin-bottom:6px;font-size:13px;font-weight:500;display:block}.form-group input{border:1px solid var(--border);border-radius:8px;outline:none;width:100%;padding:12px 16px;font-size:14px;transition:border-color .2s}.form-group input:focus{border-color:var(--primary);box-shadow:0 0 0 2px #1a73e826}.login-btn{background:var(--primary);color:#fff;border-radius:8px;width:100%;margin-top:8px;padding:12px;font-size:15px;font-weight:500;transition:background .2s}.login-btn:hover{background:var(--primary-hover)}.login-btn:disabled{opacity:.6;cursor:not-allowed}.login-error{color:var(--danger);background:#fce8e6;border-radius:8px;margin-bottom:16px;padding:10px 14px;font-size:13px}.file-manager{flex-direction:column;height:100vh;display:flex}.header{background:var(--surface);border-bottom:1px solid var(--border);align-items:center;gap:16px;height:64px;padding:8px 16px;display:flex}.header-logo{color:var(--text);align-items:center;gap:8px;min-width:200px;font-size:22px;font-weight:400;display:flex}.header-logo span{font-size:28px}.header-path{white-space:nowrap;flex:1;align-items:center;gap:4px;font-size:14px;display:flex;overflow-x:auto}.breadcrumb-item{color:var(--text-secondary);cursor:pointer;border-radius:4px;padding:4px 8px;transition:background .15s}.breadcrumb-item:hover{background:var(--hover);color:var(--text)}.breadcrumb-item.active{color:var(--text);font-weight:500}.breadcrumb-sep{color:var(--text-secondary);font-size:18px}.header-actions{align-items:center;gap:4px;display:flex}.icon-btn{width:40px;height:40px;color:var(--text-secondary);border-radius:50%;justify-content:center;align-items:center;font-size:18px;transition:background .15s;display:flex}.icon-btn:hover{background:var(--hover)}.main-layout{flex:1;display:flex;overflow:hidden}.sidebar{width:var(--sidebar-width);background:var(--surface);border-right:1px solid var(--border);flex-direction:column;display:flex;overflow:hidden}.sidebar-header{padding:16px}.new-btn{background:var(--surface);border:1px solid var(--border);color:var(--text);border-radius:24px;align-items:center;gap:10px;padding:8px 24px 8px 16px;font-size:14px;font-weight:500;transition:box-shadow .2s,background .2s;display:flex;box-shadow:0 1px 3px #00000014}.new-btn:hover{background:#f6f8fc;box-shadow:0 2px 8px #00000026}.new-btn .plus{color:var(--text);font-size:24px}.tree-container{flex:1;padding:8px 0;overflow-y:auto}.tree-item{cursor:pointer;color:var(--text);white-space:nowrap;text-overflow:ellipsis;border-radius:0 24px 24px 0;align-items:center;gap:8px;padding:6px 16px 6px 0;font-size:13px;transition:background .1s;display:flex;overflow:hidden}.tree-item:hover{background:var(--hover)}.tree-item.active{background:var(--selected);color:var(--primary);font-weight:500}.tree-toggle{width:20px;height:20px;color:var(--text-secondary);flex-shrink:0;justify-content:center;align-items:center;font-size:10px;transition:transform .2s;display:flex}.tree-toggle.open{transform:rotate(90deg)}.tree-icon{flex-shrink:0;font-size:18px}.tree-name{text-overflow:ellipsis;overflow:hidden}.content{flex-direction:column;flex:1;display:flex;overflow:hidden}.content-toolbar{border-bottom:1px solid var(--border);background:var(--surface);align-items:center;gap:8px;padding:8px 16px;display:flex}.toolbar-btn{color:var(--text-secondary);border-radius:6px;align-items:center;gap:6px;padding:6px 12px;font-size:13px;transition:background .15s;display:flex}.toolbar-btn:hover{background:var(--hover);color:var(--text)}.toolbar-btn.danger:hover{color:var(--danger);background:#fce8e6}.toolbar-spacer{flex:1}.file-list-container{flex:1;padding:8px;overflow-y:auto}.file-list-header{color:var(--text-secondary);border-bottom:1px solid var(--border);background:var(--bg);z-index:1;grid-template-columns:40px 1fr 120px 100px 120px;padding:8px 16px;font-size:12px;font-weight:500;display:grid;position:sticky;top:0}.file-row{cursor:pointer;border-radius:8px;grid-template-columns:40px 1fr 120px 100px 120px;align-items:center;padding:8px 16px;font-size:13px;transition:background .1s;display:grid}.file-row:hover{background:var(--hover)}.file-row.selected{background:var(--selected)}.file-row-icon{font-size:20px}.file-row-name{text-overflow:ellipsis;white-space:nowrap;font-weight:400;overflow:hidden}.file-row-size,.file-row-date{color:var(--text-secondary)}.file-row-perms{color:var(--text-secondary);font-family:Roboto Mono,monospace;font-size:12px}.context-menu{background:var(--surface);z-index:1000;border-radius:8px;min-width:200px;padding:8px 0;position:fixed;box-shadow:0 2px 12px #00000026}.context-menu-item{color:var(--text);cursor:pointer;text-align:left;align-items:center;gap:12px;width:100%;padding:8px 16px;font-size:13px;transition:background .1s;display:flex}.context-menu-item:hover{background:var(--hover)}.context-menu-item.danger{color:var(--danger)}.context-menu-sep{background:var(--border);height:1px;margin:4px 0}.modal-overlay{z-index:2000;background:#0006;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.modal{background:var(--surface);border-radius:12px;min-width:400px;max-width:90vw;padding:24px;box-shadow:0 8px 32px #0003}.modal h2{margin-bottom:16px;font-size:18px;font-weight:500}.modal input,.modal textarea{border:1px solid var(--border);border-radius:6px;outline:none;width:100%;margin-bottom:16px;padding:10px 14px}.modal input:focus,.modal textarea:focus{border-color:var(--primary)}.modal textarea{resize:vertical;min-height:300px;font-family:Roboto Mono,monospace;font-size:13px}.modal-actions{justify-content:flex-end;gap:8px;display:flex}.modal-btn{border-radius:6px;padding:8px 20px;font-size:14px;font-weight:500}.modal-btn.primary{background:var(--primary);color:#fff}.modal-btn.primary:hover{background:var(--primary-hover)}.modal-btn.cancel{color:var(--text-secondary)}.modal-btn.cancel:hover{background:var(--hover)}.editor-modal .modal{flex-direction:column;width:80vw;max-width:1000px;height:80vh;display:flex}.editor-modal .modal textarea{flex:1;min-height:0}.new-menu{margin-top:4px;position:absolute;top:100%;left:0}.new-menu-wrapper{display:inline-block;position:relative}.upload-overlay{border:3px dashed var(--primary);z-index:3000;pointer-events:none;background:#1a73e814;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.upload-overlay-text{color:var(--primary);font-size:24px;font-weight:500}.toast{color:#fff;z-index:5000;background:#323232;border-radius:8px;padding:12px 24px;font-size:14px;animation:.3s slideUp;position:fixed;bottom:24px;left:50%;transform:translate(-50%);box-shadow:0 4px 12px #0003}@keyframes slideUp{0%{opacity:0;transform:translate(-50%)translateY(20px)}to{opacity:1;transform:translate(-50%)translateY(0)}}.loading-bar{background:var(--primary);z-index:100;height:3px;animation:1.5s ease-in-out infinite loading;position:absolute;top:0;left:0;right:0}@keyframes loading{0%{transform:translate(-100%)}50%{transform:translate(0%)}to{transform:translate(100%)}}.empty-state{height:100%;color:var(--text-secondary);flex-direction:column;justify-content:center;align-items:center;gap:12px;font-size:14px;display:flex}.empty-state .icon{opacity:.5;font-size:64px}