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10px;font-size:13px;font-weight:500;text-decoration:none;transition:color .15s,background .15s}.about-nav-link:hover{color:var(--foreground);background:var(--node-bg)}.header-stats{gap:8px;display:flex}.stat-badge{color:var(--edge-color);background:var(--node-bg);border:1px solid var(--node-border);border-radius:999px;padding:4px 12px;font-size:13px;font-weight:500}.reset-btn{color:var(--foreground);background:var(--node-bg);border:1px solid var(--node-border);cursor:pointer;font-size:14px;font-weight:600;font-family:var(--font-sans), system-ui, sans-serif;border-radius:12px;align-items:center;gap:6px;padding:8px 16px;transition:all .2s;display:flex;box-shadow:0 1px 3px #0000000a}.reset-btn:hover:not(:disabled){color:#ef4444;border-color:#ef4444;transform:translateY(-1px);box-shadow:0 2px 8px #ef44441f}.reset-btn:disabled{opacity:.4;cursor:default}.reset-icon{font-size:16px;transition:transform .3s;display:inline-block}.reset-btn:hover:not(:disabled) .reset-icon{transform:rotate(-180deg)}.header-btn{color:var(--foreground);background:var(--node-bg);border:1px solid var(--node-border);cursor:pointer;font-size:14px;font-weight:600;font-family:var(--font-sans), system-ui, sans-serif;border-radius:12px;align-items:center;gap:6px;padding:8px 16px;transition:all .2s;display:flex;box-shadow:0 1px 3px #0000000a}.header-btn:disabled{opacity:.4;cursor:default}.header-btn-icon{font-size:15px;font-weight:700;transition:transform .25s cubic-bezier(.34,1.56,.64,1);display:inline-block}.save-btn:hover:not(:disabled){border-color:var(--why-color-1);color:var(--why-color-1);box-shadow:0 2px 8px var(--why-color-1)}@supports (color:color-mix(in lab, red, red)){.save-btn:hover:not(:disabled){box-shadow:0 2px 8px color-mix(in srgb, var(--why-color-1) 15%, transparent)}}.save-btn:hover:not(:disabled){transform:translateY(-1px)}.save-btn:hover:not(:disabled) .header-btn-icon{transform:translateY(2px)}.load-btn:hover{border-color:var(--why-color-5);color:var(--why-color-5);box-shadow:0 2px 8px var(--why-color-5)}@supports (color:color-mix(in lab, red, red)){.load-btn:hover{box-shadow:0 2px 8px color-mix(in srgb, var(--why-color-5) 15%, transparent)}}.load-btn:hover{transform:translateY(-1px)}.load-btn:hover .header-btn-icon{transform:translateY(-2px)}.export-btn:hover:not(:disabled){border-color:var(--why-color-2);color:var(--why-color-2);box-shadow:0 2px 8px var(--why-color-2)}@supports (color:color-mix(in lab, red, red)){.export-btn:hover:not(:disabled){box-shadow:0 2px 8px color-mix(in srgb, var(--why-color-2) 15%, transparent)}}.export-btn:hover:not(:disabled){transform:translateY(-1px)}.export-btn:hover:not(:disabled) .header-btn-icon{transform:scale(1.15)}.undo-btn:hover:not(:disabled){border-color:var(--why-color-3,#f59e0b);color:var(--why-color-3,#f59e0b);box-shadow:0 2px 8px var(--why-color-3,#f59e0b)}@supports (color:color-mix(in lab, red, red)){.undo-btn:hover:not(:disabled){box-shadow:0 2px 8px color-mix(in srgb, var(--why-color-3,#f59e0b) 15%, transparent)}}.undo-btn:hover:not(:disabled){transform:translateY(-1px)}.undo-btn:hover:not(:disabled) .header-btn-icon{transform:translate(-2px)}.hidden-file-input{display:none}.five-whys-flow{flex:1}.react-flow__edge-path{stroke:var(--edge-color)!important;stroke-width:2px!important}.node-handle{background:var(--edge-color)!important;border:2px solid var(--node-bg)!important;width:8px!important;height:8px!important}.flow-controls{overflow:hidden;box-shadow:var(--node-shadow)!important;border:1px solid var(--node-border)!important;border-radius:12px!important}.flow-controls button{background:var(--node-bg)!important;color:var(--foreground)!important;border-color:var(--node-border)!important;width:32px!important;height:32px!important}.flow-controls button:hover{background:var(--background)!important}.flow-controls button svg{fill:var(--foreground)!important}.issue-node{background:var(--issue-bg);border:2px solid var(--issue-border);border-radius:var(--node-radius);width:280px;box-shadow:var(--node-shadow), 0 0 0 4px var(--issue-glow);pointer-events:all;padding:16px;transition:box-shadow .3s,transform .2s;position:relative}.issue-node:hover{box-shadow:var(--node-shadow), 0 0 0 6px var(--issue-glow);transform:translateY(-1px)}.why-node{background:var(--node-bg);border:2px solid var(--accent,var(--node-border));border-radius:var(--node-radius);width:280px;box-shadow:var(--node-shadow);pointer-events:all;padding:16px;transition:box-shadow .3s,transform .2s,border-color .3s;position:relative}.why-node:hover{transform:translateY(-1px);box-shadow:0 8px 32px #0000001a,0 2px 8px #0000000f}.node-header{align-items:center;gap:8px;margin-bottom:10px;display:flex}.node-icon{font-size:18px}.node-title{text-transform:uppercase;letter-spacing:.5px;color:var(--foreground);font-size:14px;font-weight:700}.why-title{color:var(--accent,var(--foreground))}.depth-badge{color:var(--accent);background:var(--accent);margin-left:auto;font-size:11px;font-weight:600}@supports (color:color-mix(in lab, red, red)){.depth-badge{background:color-mix(in srgb, var(--accent) 10%, transparent)}}.depth-badge{border-radius:999px;padding:2px 8px}.node-input{border:1.5px solid var(--node-border);width:100%;font-size:14px;font-family:var(--font-sans), system-ui, sans-serif;color:var(--foreground);resize:none;background:0 0;border-radius:10px;outline:none;max-height:200px;padding:10px 12px;line-height:1.5;transition:border-color .2s,box-shadow .2s;overflow-y:hidden}.node-input:focus{overflow-y:auto}.node-input::placeholder{color:var(--edge-color)}.node-input:focus{border-color:var(--accent,var(--issue-border));box-shadow:0 0 0 3px var(--accent,var(--issue-border))}@supports (color:color-mix(in lab, red, red)){.node-input:focus{box-shadow:0 0 0 3px color-mix(in srgb, var(--accent,var(--issue-border)) 12%, transparent)}}.add-why-btn{background:var(--node-bg);border:2px solid var(--accent,var(--issue-border));width:28px;height:28px;color:var(--accent,var(--issue-border));cursor:pointer;z-index:5;border-radius:50%;justify-content:center;align-items:center;padding:0;font-size:16px;font-weight:800;line-height:1;transition:all .25s cubic-bezier(.34,1.56,.64,1);display:flex;position:absolute;bottom:-14px;left:50%;transform:translate(-50%)}.add-why-btn:hover{background:var(--accent,var(--issue-border));color:#fff;box-shadow:0 4px 16px var(--accent,var(--issue-border));transform:translate(-50%)scale(1.3)}@supports (color:color-mix(in lab, red, red)){.add-why-btn:hover{box-shadow:0 4px 16px color-mix(in srgb, var(--accent,var(--issue-border)) 30%, transparent)}}.add-why-btn:active{transform:translate(-50%)scale(1.1)}.add-why-icon{font-family:var(--font-sans), system-ui, sans-serif}.remove-btn{background:var(--node-bg);border:1.5px solid var(--node-border);width:24px;height:24px;color:var(--edge-color);cursor:pointer;opacity:0;z-index:5;border-radius:50%;justify-content:center;align-items:center;padding:0;font-size:16px;line-height:1;transition:all .2s;display:flex;position:absolute;top:-10px;right:-10px}.why-node:hover .remove-btn{opacity:1}.remove-btn:hover{color:#fff;background:#ef4444;border-color:#ef4444;transform:scale(1.15)}@keyframes pop-in{0%{opacity:0;transform:scale(.3)translateY(-20px)}50%{opacity:1;transform:scale(1.08)translateY(0)}70%{transform:scale(.96)}to{transform:scale(1)}}.node-pop-in .issue-node,.node-pop-in .why-node{animation:.45s cubic-bezier(.34,1.56,.64,1) forwards pop-in}.modal-overlay{background:var(--modal-overlay);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:100;justify-content:center;align-items:center;animation:.2s fade-in;display:flex;position:fixed;inset:0}@keyframes fade-in{0%{opacity:0}to{opacity:1}}.modal-content{background:var(--node-bg);border:1px solid var(--node-border);text-align:center;border-radius:20px;width:90%;max-width:380px;padding:32px;animation:.3s cubic-bezier(.34,1.56,.64,1) modal-pop;box-shadow:0 24px 64px #00000026}@keyframes modal-pop{0%{opacity:0;transform:scale(.85)translateY(10px)}to{opacity:1;transform:scale(1)translateY(0)}}.modal-icon{margin-bottom:12px;font-size:40px}.modal-title{color:var(--foreground);margin:0 0 8px;font-size:20px;font-weight:700}.modal-text{color:var(--edge-color);margin:0 0 24px;font-size:14px;line-height:1.5}.modal-actions{justify-content:center;gap:12px;display:flex}.modal-btn{cursor:pointer;font-size:14px;font-weight:600;font-family:var(--font-sans), system-ui, sans-serif;border:none;border-radius:12px;padding:10px 20px;transition:all .2s}.modal-btn-cancel{background:var(--background);color:var(--foreground);border:1px solid var(--node-border)}.modal-btn-cancel:hover{background:var(--node-border)}.modal-btn-confirm{color:#fff;background:#ef4444}.modal-btn-confirm:hover{background:#dc2626;transform:translateY(-1px);box-shadow:0 4px 12px #ef44444d}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--node-border);border-radius:3px}.header-right{align-items:center;gap:10px;display:flex}.theme-switcher{position:relative}.theme-switcher-btn{background:var(--node-bg);border:1px solid var(--node-border);cursor:pointer;border-radius:12px;justify-content:center;align-items:center;width:38px;height:38px;padding:0;font-size:18px;transition:all .2s;display:flex;box-shadow:0 1px 3px #0000000a}.theme-switcher-btn:hover{border-color:var(--edge-color);transform:translateY(-1px);box-shadow:0 3px 10px #00000014}.theme-switcher-emoji{line-height:1}.theme-dropdown{background:var(--node-bg);border:1px solid var(--node-border);z-index:50;border-radius:14px;min-width:180px;padding:6px;animation:.2s cubic-bezier(.34,1.56,.64,1) modal-pop;position:absolute;top:calc(100% + 8px);right:0;box-shadow:0 12px 40px #0000001f}.theme-option{cursor:pointer;width:100%;font-size:14px;font-weight:500;font-family:var(--font-sans), system-ui, sans-serif;color:var(--foreground);background:0 0;border:none;border-radius:10px;align-items:center;gap:10px;padding:8px 12px;transition:background .15s;display:flex}.theme-option:hover{background:var(--foreground)}@supports (color:color-mix(in lab, red, red)){.theme-option:hover{background:color-mix(in srgb, var(--foreground) 6%, transparent)}}.theme-option-active{background:var(--foreground)}@supports (color:color-mix(in lab, red, red)){.theme-option-active{background:color-mix(in srgb, var(--foreground) 8%, transparent)}}.theme-swatch{border:2px solid var(--node-border);border-radius:50%;flex-shrink:0;width:18px;height:18px}.theme-option-active .theme-swatch{border-color:var(--issue-border);box-shadow:0 0 0 2px var(--issue-border)}@supports (color:color-mix(in lab, red, red)){.theme-option-active .theme-swatch{box-shadow:0 0 0 2px color-mix(in srgb, var(--issue-border) 25%, transparent)}}.theme-option-emoji{font-size:16px}.theme-option-label{text-align:left;flex:1}.theme-check{color:var(--issue-border);font-size:14px;font-weight:700}.export-modal{max-width:420px}.export-section{text-align:left;margin-bottom:20px}.export-label{text-transform:uppercase;letter-spacing:.5px;color:var(--edge-color);margin-bottom:8px;font-size:13px;font-weight:600;display:block}.export-size-picker{gap:8px;display:flex}.export-size-btn{border:2px solid var(--node-border);background:var(--background);cursor:pointer;font-family:var(--font-sans), system-ui, sans-serif;border-radius:12px;flex-direction:column;flex:1;align-items:center;gap:4px;padding:12px 8px;transition:all .2s;display:flex}.export-size-btn:hover{border-color:var(--edge-color);transform:translateY(-1px)}.export-size-btn-active{border-color:var(--why-color-1);background:var(--why-color-1)}@supports (color:color-mix(in lab, red, red)){.export-size-btn-active{background:color-mix(in srgb, var(--why-color-1) 8%, transparent)}}.export-size-btn-active{box-shadow:0 0 0 3px var(--why-color-1)}@supports (color:color-mix(in lab, red, red)){.export-size-btn-active{box-shadow:0 0 0 3px color-mix(in srgb, var(--why-color-1) 12%, transparent)}}.export-size-emoji{font-size:18px}.export-size-label{color:var(--foreground);font-size:13px;font-weight:600}.export-size-scale{color:var(--edge-color);font-size:11px;font-weight:500}.export-toggle-row{justify-content:space-between;align-items:center;margin-bottom:4px;display:flex}.export-toggle{background:var(--node-border);cursor:pointer;border:none;border-radius:999px;width:44px;height:24px;padding:0;transition:background .2s;position:relative}.export-toggle-on{background:var(--why-color-1)}.export-toggle-knob{background:#fff;border-radius:50%;width:18px;height:18px;transition:transform .2s cubic-bezier(.34,1.56,.64,1);position:absolute;top:3px;left:3px;box-shadow:0 1px 3px #00000026}.export-toggle-on .export-toggle-knob{transform:translate(20px)}.export-hint{color:var(--edge-color);margin:4px 0 0;font-size:12px;line-height:1.4}.export-btn-confirm{background:var(--why-color-1);color:#fff}.export-btn-confirm:hover:not(:disabled){filter:brightness(1.1);box-shadow:0 4px 12px var(--why-color-1);transform:translateY(-1px)}@supports (color:color-mix(in lab, red, red)){.export-btn-confirm:hover:not(:disabled){box-shadow:0 4px 12px color-mix(in srgb, var(--why-color-1) 35%, transparent)}}.export-btn-confirm:disabled{opacity:.6;cursor:default}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-gradient-position{syntax:"*";inherits:false}@property --tw-gradient-from{syntax:"<color>";inherits:false;initial-value:#0000}@property --tw-gradient-via{syntax:"<color>";inherits:false;initial-value:#0000}@property --tw-gradient-to{syntax:"<color>";inherits:false;initial-value:#0000}@property --tw-gradient-stops{syntax:"*";inherits:false}@property --tw-gradient-via-stops{syntax:"*";inherits:false}@property --tw-gradient-from-position{syntax:"<length-percentage>";inherits:false;initial-value:0%}@property --tw-gradient-via-position{syntax:"<length-percentage>";inherits:false;initial-value:50%}@property --tw-gradient-to-position{syntax:"<length-percentage>";inherits:false;initial-value:100%}@property --tw-leading{syntax:"*";inherits:false}@property --tw-font-weight{syntax:"*";inherits:false}@property --tw-tracking{syntax:"*";inherits:false}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}@property --tw-duration{syntax:"*";inherits:false}@property --tw-translate-x{syntax:"*";inherits:false;initial-value:0}@property --tw-translate-y{syntax:"*";inherits:false;initial-value:0}@property --tw-translate-z{syntax:"*";inherits:false;initial-value:0}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}