:root{--primary:#5855e8;--primary-hover:#4744d1;--primary-light:#eeedfc;--primary-ring:#5855e82e;--bg:#fafafa;--card-bg:#fff;--text:#1e1e24;--text-muted:#8b8b96;--border:#ebebf0;--border-focus:#cbc8f0;--success:#059669;--success-bg:#ecfdf5;--error:#e11d48;--error-bg:#fff1f3;--radius-sm:8px;--radius:12px;--radius-lg:16px;--shadow-sm:0 1px 2px #0000000a;--shadow-card:0 1px 3px #0000000f, 0 1px 2px #0000000a;--shadow-hover:0 4px 16px #00000014;--ease:cubic-bezier(.4, 0, .2, 1)}.app-layout{min-height:100vh;display:flex}.sidebar{background:var(--card-bg);border-right:1px solid var(--border);flex-direction:column;flex-shrink:0;width:220px;display:flex}.sidebar-brand{color:var(--primary);letter-spacing:-.01em;border-bottom:1px solid var(--border);padding:20px 24px;font-size:16px;font-weight:700;text-decoration:none;display:block}.sidebar-nav{flex-direction:column;flex:1;gap:2px;padding:12px 10px;display:flex}.sidebar-item{border-radius:var(--radius-sm);color:var(--text);transition:background .15s var(--ease), color .15s var(--ease);align-items:center;gap:10px;padding:10px 14px;font-size:14px;font-weight:500;text-decoration:none;display:flex}.sidebar-item:hover{background:#f5f5f8}.sidebar-item.active{background:var(--primary-light);color:var(--primary)}.sidebar-icon{text-align:center;width:24px;font-size:18px}.sidebar-footer{border-top:1px solid var(--border);padding:16px 24px}.sidebar-user{color:var(--text-muted);font-size:13px;font-weight:500}.main-area{flex-direction:column;flex:1;min-width:0;display:flex}.topbar{border-bottom:1px solid var(--border);background:var(--card-bg);flex-shrink:0;justify-content:flex-end;align-items:center;gap:10px;padding:12px 24px;display:flex}.main-content{flex:1;overflow-y:auto}*,:before,:after{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,sans-serif;line-height:1.6}.page{max-width:720px;margin:0 auto;padding:48px 24px}h1{letter-spacing:-.02em;margin-bottom:6px;font-size:28px;font-weight:700}.subtitle{color:var(--text-muted);margin-bottom:36px;font-size:15px}.btn-primary{background:var(--primary);color:#fff;border-radius:var(--radius);cursor:pointer;transition:background .2s var(--ease), transform .1s var(--ease), box-shadow .2s var(--ease);border:none;justify-content:center;align-items:center;padding:12px 28px;font-size:15px;font-weight:600;text-decoration:none;display:inline-flex}.btn-primary:hover{background:var(--primary-hover);box-shadow:0 2px 8px #5855e84d}.btn-primary:active{transform:scale(.98)}.btn-primary:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn-secondary{background:var(--card-bg);color:var(--text);border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;transition:background .2s var(--ease), border-color .2s var(--ease), box-shadow .2s var(--ease);align-items:center;padding:8px 18px;font-size:14px;font-weight:500;text-decoration:none;display:inline-flex}.btn-secondary:hover{border-color:var(--border-focus);background:#f5f5f8}.btn-block{text-align:center;width:100%}.input-header{justify-content:space-between;align-items:center;margin-bottom:6px;display:flex}.input-header h1{margin-bottom:0}.input-header-links{align-items:center;gap:12px;display:flex}.welcome-text{color:var(--text-muted);font-size:14px;font-weight:500}.drop-zone{border:2px dashed var(--border);border-radius:var(--radius);text-align:center;cursor:pointer;transition:border-color .2s var(--ease), background .2s var(--ease), box-shadow .2s var(--ease);background:var(--card-bg);margin-bottom:24px;padding:40px 32px}.drop-zone:before{content:"📄";margin-bottom:12px;font-size:32px;display:block}.drop-zone:hover,.drop-zone-active{border-color:var(--primary);background:var(--primary-light);box-shadow:0 0 0 4px var(--primary-ring)}.drop-zone p{color:var(--text-muted);font-size:14px}.drop-zone strong{color:var(--text)}.md-editor{border:1px solid var(--border);border-radius:var(--radius);resize:vertical;background:var(--card-bg);width:100%;color:var(--text);transition:border-color .2s var(--ease), box-shadow .2s var(--ease);margin-bottom:24px;padding:16px;font-family:JetBrains Mono,Cascadia Code,Consolas,Fira Code,monospace;font-size:13px;line-height:1.7}.md-editor:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-ring);outline:none}.md-editor::placeholder{color:#c0c0cc}.login-hint{text-align:center;color:var(--text-muted);margin-top:20px;font-size:13px}.result-page{flex-direction:column;max-width:100%;height:100vh;padding:0;display:flex}.result-header{border-bottom:1px solid var(--border);background:var(--card-bg);flex-shrink:0;justify-content:space-between;align-items:center;padding:10px 24px;display:flex}.result-header h2{letter-spacing:-.01em;font-size:16px;font-weight:600}.result-header-left,.result-header-right{align-items:center;gap:12px;display:flex}.share-badge{background:var(--primary-light);color:var(--primary);border-radius:20px;align-items:center;padding:4px 12px;font-size:12px;font-weight:600;display:inline-flex}.result-body{flex:1;display:flex;overflow:hidden}.mindmap-container{flex:1;min-width:0;overflow:hidden}.detail-panel{border-left:1px solid var(--border);background:var(--card-bg);flex-direction:column;flex-shrink:0;width:340px;display:flex}.detail-panel h3{border-bottom:1px solid var(--border);color:var(--text-muted);text-transform:none;letter-spacing:0;padding:16px 20px;font-size:14px;font-weight:600}.detail-content{flex:1;padding:20px;overflow-y:auto}.detail-content pre{white-space:pre-wrap;color:var(--text);font-family:-apple-system,BlinkMacSystemFont,sans-serif;font-size:14px;line-height:1.7}.detail-placeholder{color:#c0c0cc;text-align:center;margin-top:80px;font-size:14px}.auth-page{background:var(--bg);justify-content:center;align-items:center;min-height:100vh;padding:24px;display:flex}.auth-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius-lg);width:100%;max-width:420px;box-shadow:var(--shadow-card);padding:44px 40px}.auth-card h1{margin-bottom:2px;font-size:24px}.auth-subtitle{color:var(--text-muted);margin-bottom:32px;font-size:14px}.auth-form{flex-direction:column;gap:18px;display:flex}.auth-form label{color:var(--text-muted);text-transform:none;letter-spacing:.01em;flex-direction:column;gap:6px;font-size:13px;font-weight:600;display:flex}.auth-form input{border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);background:var(--card-bg);transition:border-color .2s var(--ease), box-shadow .2s var(--ease);padding:11px 14px;font-family:inherit;font-size:15px}.auth-form input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-ring);outline:none}.auth-form input::placeholder{color:#c0c0cc}.auth-form .optional{color:var(--text-muted);font-style:normal;font-weight:400}.auth-error{background:var(--error-bg);color:var(--error);border-radius:var(--radius-sm);padding:10px 14px;font-size:13px;font-weight:500}.auth-success{background:var(--success-bg);color:var(--success);border-radius:var(--radius-sm);padding:10px 14px;font-size:13px;font-weight:500}.auth-switch{text-align:center;color:var(--text-muted);margin-top:24px;font-size:14px}.auth-switch a{color:var(--primary);font-weight:600;text-decoration:none}.auth-switch a:hover{text-decoration:underline}.code-row{gap:8px;display:flex}.code-row input{flex:1;min-width:0}.send-code-btn{white-space:nowrap;flex-shrink:0}.auth-tabs{background:var(--bg);border-radius:var(--radius-sm);gap:4px;margin-bottom:24px;padding:4px;display:flex}.auth-tab{border-radius:var(--radius-sm);color:var(--text-muted);cursor:pointer;transition:background .2s var(--ease), color .2s var(--ease);background:0 0;border:none;flex:1;padding:8px 12px;font-size:14px;font-weight:500}.auth-tab.active{background:var(--card-bg);color:var(--text);box-shadow:0 1px 3px #00000014}.auth-forgot{text-align:right;margin-top:-8px}.auth-forgot a{color:var(--text-muted);font-size:13px;text-decoration:none}.auth-forgot a:hover{color:var(--primary)}.auth-links{justify-content:space-between;font-size:13px;display:flex}.auth-link{color:var(--text-muted);cursor:pointer;background:0 0;border:none;padding:0;font-size:13px}.auth-link:hover{color:var(--primary)}.landing-page{background:radial-gradient(45% 60% at 10% 5%,#7c3aed38 0%,#0000 60%),radial-gradient(40% 55% at 92% 0,#22d3ee33 0%,#0000 60%),radial-gradient(52% 62% at 50% 108%,#e879f933 0%,#0000 62%),linear-gradient(160deg,#fcfcff 0%,#f5f2ff 100%);justify-content:center;align-items:center;gap:96px;min-height:100vh;padding:48px;display:flex}.landing-hero{max-width:460px}.landing-title{background:linear-gradient(120deg,#7c3aed 0%,#a855f7 45%,#22d3ee 100%);color:#0000;-webkit-background-clip:text;background-clip:text;margin:0;font-size:34px;font-weight:700}.landing-tagline{color:var(--text-muted);margin:12px 0 36px;font-size:20px}.landing-features{flex-direction:column;gap:16px;margin:0;padding:0;list-style:none;display:flex}.landing-features li{color:var(--text);font-size:15px}.landing-auth{width:100%;max-width:420px}@media (width<=900px){.landing-page{flex-direction:column;gap:40px}.landing-hero{text-align:center;max-width:480px}}.notes-header{justify-content:space-between;align-items:flex-start;margin-bottom:36px;display:flex}.notes-header h1{margin-bottom:4px}.notes-header .subtitle{margin-bottom:0}.notes-header-actions{gap:10px;padding-top:8px;display:flex}.search-bar{gap:10px;margin-bottom:28px;display:flex}.search-input{border:1px solid var(--border);border-radius:var(--radius);color:var(--text);background:var(--card-bg);transition:border-color .2s var(--ease), box-shadow .2s var(--ease);flex:1;padding:10px 14px;font-family:inherit;font-size:14px}.search-input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-ring);outline:none}.search-input::placeholder{color:#c0c0cc}.notes-status{text-align:center;color:var(--text-muted);padding:60px 0;font-size:14px}.notes-status.error{color:var(--error)}.notes-empty{text-align:center;background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:80px 24px}.notes-empty p{color:var(--text-muted);margin-bottom:24px;font-size:15px}.notes-list{flex-direction:column;gap:8px;display:flex}.note-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm);transition:transform .15s var(--ease), box-shadow .15s var(--ease), border-color .15s var(--ease);justify-content:space-between;align-items:center;padding:18px 22px;display:flex}.note-card:hover{box-shadow:var(--shadow-hover);border-color:var(--border-focus);transform:translateY(-1px)}.note-card-body{flex:1;min-width:0}.note-card-title{color:var(--text);transition:color .15s var(--ease);font-size:15px;font-weight:600;text-decoration:none}.note-card-title:hover{color:var(--primary)}.note-card-meta{color:var(--text-muted);align-items:center;gap:10px;margin-top:4px;font-size:13px;display:flex}.tag-public{background:var(--primary-light);color:var(--primary);border-radius:20px;padding:2px 10px;font-size:11px;font-weight:600}.note-card-actions{flex-shrink:0;align-items:center;gap:4px;display:flex}.toggle-public{border:1px solid var(--border);cursor:pointer;border-radius:var(--radius-sm);opacity:.4;transition:opacity .15s var(--ease), border-color .15s var(--ease), background .15s var(--ease);background:0 0;padding:4px 8px;font-size:16px}.toggle-public:hover{opacity:1;border-color:var(--primary)}.toggle-public.is-public{opacity:1;background:var(--primary-light);border-color:#0000}.btn-icon-copy{border:1px solid var(--border);cursor:pointer;border-radius:var(--radius-sm);opacity:.4;transition:opacity .15s var(--ease), border-color .15s var(--ease);background:0 0;padding:4px 8px;font-size:14px}.btn-icon-copy:hover{opacity:1;border-color:var(--primary)}.btn-icon-delete{cursor:pointer;border-radius:var(--radius-sm);opacity:.25;transition:opacity .15s var(--ease), background .15s var(--ease);background:0 0;border:none;padding:6px 8px;font-size:17px}.btn-icon-delete:hover{opacity:1;background:var(--error-bg)}:focus-visible{outline:2px solid var(--primary);outline-offset:2px}button:focus:not(:focus-visible),a:focus:not(:focus-visible){outline:none}@media (prefers-reduced-motion:reduce){*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important}}.mindmap-tree-svg{background:#fafafc radial-gradient(circle,#e8e8f0 1px,#0000 1px) 0 0/22px 22px}.mindmap-tree-svg:active{cursor:grabbing}.tree-link{transition:d .35s var(--ease)}.tree-node-rect{fill:#fff;stroke:var(--border);stroke-width:1px;filter:drop-shadow(0 1px 2px #0000000f);transition:fill .15s var(--ease), stroke .15s var(--ease)}.tree-node:hover .tree-node-rect{fill:#f8f7ff;stroke:var(--primary)}.tree-node-text{fill:var(--text);pointer-events:none;-webkit-user-select:none;user-select:none;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-size:13px;font-weight:500}.tree-toggle-icon{fill:var(--text-muted);-webkit-user-select:none;user-select:none;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-size:14px;font-weight:700}.tree-node:hover .tree-toggle-icon{fill:var(--primary)}.tree-detail-icon{opacity:0;cursor:pointer;transition:opacity .15s var(--ease);font-size:13px}.tree-node:hover .tree-detail-icon{opacity:1}.modal-overlay{z-index:1000;animation:fadeIn .15s var(--ease);background:#0000004d;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.modal-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius-lg);width:90%;max-width:640px;max-height:70vh;animation:slideUp .2s var(--ease);flex-direction:column;display:flex;box-shadow:0 20px 60px #00000026}.modal-header{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;padding:16px 24px;display:flex}.modal-header h3{font-size:16px;font-weight:600}.modal-close{color:var(--text-muted);cursor:pointer;border-radius:var(--radius-sm);transition:background .15s var(--ease), color .15s var(--ease);background:0 0;border:none;padding:4px 8px;font-size:20px}.modal-close:hover{color:var(--text);background:#f3f3f6}.modal-body{flex:1;padding:24px;overflow-y:auto}.modal-body pre{white-space:pre-wrap;color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-size:14px;line-height:1.8}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)scale(.97)}to{opacity:1;transform:translateY(0)scale(1)}}.detail-content::-webkit-scrollbar{width:6px}.detail-content::-webkit-scrollbar-track{background:0 0}.detail-content::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}.detail-content::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}