:root{--bg-primary: #111;--bg-input: #1a1a1a;--bg-code: #0a0a0a;--bg-active: #1e1e1e;--border-section: #333;--border-input: #444;--border-subtle: #222;--text-primary: #e8e8e8;--text-secondary: #ccc;--text-muted: #aaa;--text-dim: #666;--text-inactive: #555;--accent: #e8e8e8;--success: #7c9;--error: #c66;--error-border: #522;--interior-wall: #886;--building-outline: #999;--grid: #1a1a1a;--font-mono: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;--text-xs: 11px;--text-sm: 12px;--text-base: 13px;--text-md: 14px;--text-lg: 18px;--space-xs: 4px;--space-sm: 8px;--space-md: 12px;--space-lg: 16px;--space-xl: 20px;--space-2xl: 24px;--radius-sm: 0;--radius-md: 0;--radius-lg: 0;--transition-fast: .15s ease;--transition-normal: .2s ease}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{-webkit-text-size-adjust:100%}body{font-family:var(--font-sans);background:var(--bg-primary);color:var(--text-primary);min-height:100vh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}input,select,button,textarea{font:inherit}.field-row{display:flex;gap:var(--space-lg);flex-wrap:wrap}.field-row>*{flex:1;min-width:120px}.card{background:var(--bg-input);border:1px solid var(--border-section);border-radius:var(--radius-lg);padding:var(--space-lg)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}.app-header{border-bottom:1px solid var(--border-section);padding:var(--space-lg) var(--space-2xl);display:flex;justify-content:space-between;align-items:center}.app-brand-label{font-size:var(--text-xs);color:var(--text-dim);letter-spacing:.04em;text-transform:uppercase;font-weight:600}.app-brand-title{font-size:var(--text-lg);font-weight:600;color:var(--text-primary);letter-spacing:.02em}.plan-view-container{flex-shrink:0}.plan-svg{width:100%;max-width:280px;height:auto;background:var(--bg-code);border:1px solid var(--border-section)}.progress-bar{display:flex;border-bottom:1px solid var(--border-section);overflow:auto}.progress-step{flex:1;padding:10px 8px;background:transparent;color:var(--text-inactive);border:none;border-bottom:2px solid transparent;cursor:pointer;font-size:var(--text-xs);text-transform:uppercase;letter-spacing:.04em;white-space:nowrap;transition:all var(--transition-fast)}.progress-step.active{background:var(--bg-active);color:var(--text-primary);border-bottom-color:var(--text-primary)}.progress-step.completed{color:var(--text-muted)}.progress-step-num{margin-right:var(--space-xs);font-size:10px;opacity:.5}.step-content{padding:var(--space-sm) var(--space-2xl) var(--space-2xl);max-width:680px}.step-nav{border-top:1px solid var(--border-section);padding:var(--space-lg) var(--space-2xl);display:flex;justify-content:space-between;max-width:680px}.btn-back,.btn-next{padding:10px 24px;cursor:pointer;font-size:var(--text-base);letter-spacing:.03em;transition:background var(--transition-fast),color var(--transition-fast)}.btn-back{background:none;border:2px solid var(--border-input);color:var(--text-muted)}.btn-back:hover:not(:disabled){background:var(--text-primary);color:var(--bg-primary)}.btn-back:disabled{color:var(--border-input);border-color:var(--border-section);cursor:default}.btn-next{background:none;border:2px solid var(--text-primary);color:var(--text-primary);font-weight:500}.btn-next:hover:not(:disabled){background:var(--text-primary);color:var(--bg-primary)}.btn-next:disabled{border-color:var(--border-section);color:var(--text-dim);cursor:default}.field-note{color:var(--text-dim);font-size:var(--text-sm);margin-top:var(--space-sm);font-style:italic}.section-title{color:var(--text-muted);font-size:var(--text-sm);text-transform:uppercase;letter-spacing:.04em;margin-bottom:var(--space-lg);margin-top:var(--space-2xl);border-bottom:1px solid var(--border-section);padding-bottom:var(--space-sm);font-weight:500}.section-title:first-child{margin-top:var(--space-lg)}.field{flex:1;min-width:120px}.field-label{display:block;color:var(--text-dim);font-size:var(--text-xs);text-transform:uppercase;letter-spacing:.04em;margin-bottom:6px;font-weight:500}.num-input-wrapper{position:relative}.input-number{background:var(--bg-input);border:2px solid var(--border-input);color:var(--text-primary);padding:8px 12px;font-size:var(--text-md);width:100%}.input-number:focus{outline:none;border-color:var(--text-primary)}.input-number.has-unit{padding-right:36px}.input-unit{position:absolute;right:10px;top:50%;transform:translateY(-50%);color:var(--text-dim);font-size:var(--text-sm);pointer-events:none}.input-select{background:var(--bg-input);border:2px solid var(--border-input);color:var(--text-primary);padding:8px 12px;font-size:var(--text-md);width:100%;cursor:pointer}.input-select:focus{outline:none;border-color:var(--text-primary)}.input-text{background:var(--bg-input);border:2px solid var(--border-input);color:var(--text-primary);padding:8px 12px;font-size:var(--text-md);width:100%}.input-text:focus{outline:none;border-color:var(--text-primary)}.input-readonly{opacity:.5;cursor:default}.ply-grid{display:flex;gap:6px}.ply-btn{flex:1;padding:8px 0;background:transparent;color:var(--text-dim);border:2px solid var(--border-input);cursor:pointer;font-size:var(--text-base);font-weight:400;transition:all var(--transition-fast)}.ply-btn:hover{border-color:var(--text-primary);color:var(--text-primary)}.ply-btn.active{background:var(--text-primary);color:var(--bg-primary);border-color:var(--text-primary);font-weight:600}.toggle{display:flex;align-items:center;gap:10px;cursor:pointer;-webkit-user-select:none;user-select:none}.toggle-track{width:40px;height:22px;border-radius:11px;background:var(--border-input);position:relative;transition:background var(--transition-normal);flex-shrink:0}.toggle.on .toggle-track{background:var(--text-primary)}.toggle-thumb{width:16px;height:16px;border-radius:50%;background:var(--bg-primary);position:absolute;top:3px;left:3px;transition:left var(--transition-normal)}.toggle.on .toggle-thumb{left:21px}.toggle-label{color:var(--text-primary);font-size:var(--text-md)}.wall-tabs{display:flex;gap:0;margin-bottom:var(--space-xl)}.wall-tab{flex:1;padding:8px 4px;background:transparent;color:var(--text-dim);border:none;border-bottom:2px solid var(--border-input);cursor:pointer;font-size:var(--text-sm);text-transform:uppercase;letter-spacing:.04em;font-weight:500;transition:all var(--transition-fast)}.wall-tab:hover{color:var(--text-muted)}.wall-tab.active{color:var(--text-primary);border-bottom-color:var(--text-primary)}.interior-wall-card{background:var(--bg-input);border:2px solid var(--border-section);padding:var(--space-lg);margin-bottom:var(--space-md)}.interior-wall-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--space-md)}.interior-wall-label{color:var(--text-muted);font-size:var(--text-sm);font-weight:600;letter-spacing:.04em}.btn-add{background:none;border:2px dashed var(--border-input);color:var(--text-dim);padding:10px 20px;cursor:pointer;width:100%;font-size:var(--text-base);letter-spacing:.03em;transition:all var(--transition-fast)}.btn-add:hover{border-color:var(--text-primary);color:var(--text-primary)}.btn-add-small{background:none;border:2px dashed var(--border-input);color:var(--text-dim);padding:4px 12px;cursor:pointer;font-size:var(--text-xs)}.btn-add-small:hover{border-color:var(--text-primary);color:var(--text-primary)}.btn-remove{background:none;border:2px solid var(--error-border);color:var(--error);padding:2px 10px;cursor:pointer;font-size:var(--text-xs)}.btn-remove-inline{background:none;border:none;color:var(--error);cursor:pointer;font-size:16px;padding:var(--space-sm)}.opening-row{display:flex;gap:var(--space-sm);align-items:flex-end;margin-bottom:var(--space-sm);flex-wrap:wrap}.opening-row .field{flex:0 0 70px;min-width:70px}.opening-row .field-origin{flex:0 0 85px;min-width:85px}.opening-type-label{color:var(--text-dim);font-size:var(--text-xs);margin-bottom:var(--space-sm);text-transform:uppercase;letter-spacing:.04em;font-weight:500}.review-summary{background:var(--bg-input);border:2px solid var(--border-section);padding:var(--space-lg);margin-bottom:var(--space-xl)}.review-summary-line{color:var(--text-secondary);font-size:var(--text-base);padding:var(--space-xs) 0;border-bottom:1px solid var(--border-subtle)}.review-summary-line:last-child{border-bottom:none}.json-wrapper{position:relative}.json-btn-row{position:absolute;top:8px;right:8px;display:flex;gap:6px;z-index:1}.btn-copy{background:transparent;border:2px solid var(--border-input);color:var(--text-primary);padding:4px 12px;cursor:pointer;font-size:var(--text-xs);transition:background var(--transition-fast),color var(--transition-fast)}.btn-copy:hover{background:var(--text-primary);color:var(--bg-primary)}.btn-copy.copied{background:var(--success);border-color:var(--success);color:var(--bg-primary)}.json-pre{background:var(--bg-code);border:2px solid var(--border-section);padding:var(--space-lg);color:var(--text-muted);font-size:var(--text-xs);overflow:auto;max-height:300px;margin:0;white-space:pre-wrap;word-break:break-all}.empty-state{color:var(--text-dim);font-size:var(--text-base);font-style:italic}.input-error{border-color:var(--error)!important}.error-message{color:var(--error);font-size:var(--text-xs);margin-top:var(--space-xs)}@media(max-width:480px){.progress-bar{font-size:9px}.progress-step{padding:8px 4px;font-size:9px;letter-spacing:.5px}.step-content{padding:var(--space-sm) var(--space-lg) var(--space-lg)}.step-nav{padding:var(--space-md) var(--space-lg)}.app-header{padding:var(--space-md) var(--space-lg);flex-direction:column;gap:var(--space-md)}.field-row{flex-direction:column}.plan-svg{max-width:100%}}