:root{--bg-app:#f7f4ee;--bg-app-alt:#f0ebe1;--bg-card:#ffffffe0;--bg-card-solid:#fff;--bg-card-subtle:#fcfbf9;--bg-surface-hover:#f5f1e8;--bg-surface-active:#e8f0fe;--border-subtle:#e8e2d8;--border-card:#ded6c9;--border-focus:#2563eb;--border-hover:#c9bfb0;--primary:#2563eb;--primary-hover:#1d4ed8;--primary-light:#eff6ff;--primary-text:#1d4ed8;--accent-cyan:#0284c7;--accent-amber:#d97706;--accent-emerald:#059669;--text-primary:#0f172a;--text-secondary:#475569;--text-muted:#64748b;--text-faint:#94a3b8;--shadow-sm:0 1px 3px #0000000a, 0 1px 2px #00000005;--shadow-md:0 4px 16px -2px #0000000d, 0 2px 6px -1px #00000005;--shadow-lg:0 10px 25px -4px #0000000f, 0 4px 10px -2px #00000008;--shadow-paper:0 12px 36px -4px #2d23141f, 0 4px 14px -2px #2d23140f;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-xl:20px;--radius-full:9999px;--font-sans:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono:"JetBrains Mono", monospace;--transition:all .18s cubic-bezier(.4, 0, .2, 1)}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{max-width:100vw;overflow-x:hidden}body{background-color:var(--bg-app);max-width:100vw;min-height:100vh;color:var(--text-primary);font-family:var(--font-sans);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-image:radial-gradient(at 15% 10%,#f0ebe1cc 0,#0000 50%),radial-gradient(at 85% 85%,#ebe3d6b3 0,#0000 50%);background-attachment:fixed;font-size:14px;line-height:1.5;overflow-x:hidden}.font-mono{font-family:var(--font-mono)}.app-container{flex-direction:column;width:100%;max-width:1720px;min-height:100vh;margin:0 auto;padding:24px 32px 48px;display:flex;position:relative;overflow-x:hidden}.header-wrapper{margin-bottom:24px}.header-top{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;display:flex}.header-brand{align-items:center;gap:14px;display:flex}.header-icon-box{border-radius:var(--radius-md);border:1px solid var(--border-card);width:46px;height:46px;color:var(--primary);box-shadow:var(--shadow-sm);background:linear-gradient(135deg,#fff 0%,#edf2f7 100%);flex-shrink:0;justify-content:center;align-items:center;display:flex}.header-badge{border-radius:var(--radius-full);color:#1d4ed8;text-transform:uppercase;letter-spacing:.5px;background:#e9f2ff;border:1px solid #bfdbfe;align-items:center;gap:6px;margin-bottom:4px;padding:4px 12px;font-size:11px;font-weight:600;display:inline-flex}.header-title{color:var(--text-primary);letter-spacing:-.5px;font-size:26px;font-weight:800;line-height:1.2}.header-subtitle{color:var(--text-secondary);max-width:680px;margin-top:4px;font-size:13.5px}.header-actions{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.btn{border-radius:var(--radius-md);cursor:pointer;transition:var(--transition);white-space:nowrap;border:1px solid #0000;justify-content:center;align-items:center;gap:8px;padding:9px 18px;font-size:13.5px;font-weight:600;text-decoration:none;display:inline-flex}.btn-primary{background-color:var(--primary);color:#fff;box-shadow:0 2px 8px #2563eb40}.btn-primary:hover{background-color:var(--primary-hover);transform:translateY(-1px);box-shadow:0 4px 14px #2563eb59}.btn-secondary{background-color:var(--bg-card-solid);border-color:var(--border-card);color:var(--text-primary);box-shadow:var(--shadow-sm)}.btn-secondary:hover{background-color:var(--bg-surface-hover);border-color:var(--border-hover);transform:translateY(-1px)}.btn-icon-only{border-radius:var(--radius-md);padding:8px}.mobile-view-tabs{border-radius:var(--radius-lg);border:1px solid var(--border-card);box-shadow:var(--shadow-sm);background:#eae3d6;gap:4px;margin-bottom:20px;padding:4px;display:none}.mobile-tab-btn{border-radius:calc(var(--radius-lg) - 4px);color:var(--text-secondary);cursor:pointer;transition:var(--transition);background:0 0;border:none;flex:1;justify-content:center;align-items:center;gap:8px;padding:10px 14px;font-size:13px;font-weight:700;display:flex}.mobile-tab-btn.active{color:var(--primary);background:#fff;box-shadow:0 2px 8px #00000014}.mobile-floating-bar{z-index:999;-webkit-backdrop-filter:blur(12px);border:1px solid var(--border-card);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);background:#fffffff0;gap:10px;padding:8px 12px;display:none;position:fixed;bottom:16px;left:16px;right:16px}.mobile-only-quick-action{margin-top:10px;display:none}.main-workspace{grid-template-columns:460px 1fr;align-items:start;gap:28px;width:100%;display:grid}.controls-panel,.preview-column{flex-direction:column;gap:20px;width:100%;display:flex}.card{background:var(--bg-card);-webkit-backdrop-filter:blur(10px);border:1px solid var(--border-card);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);transition:var(--transition);width:100%;padding:20px}.card:hover{border-color:var(--border-hover)}.card-header{border-bottom:1px solid var(--border-subtle);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;margin-bottom:16px;padding-bottom:12px;display:flex}.card-header-title-group{align-items:center;gap:10px;display:flex}.card-header-icon{border-radius:var(--radius-sm);border:1px solid var(--border-subtle);width:32px;height:32px;color:var(--text-secondary);background:#f1eee6;justify-content:center;align-items:center;display:flex}.card-title{color:var(--text-primary);letter-spacing:-.2px;font-size:15px;font-weight:700}.card-badge{font-family:var(--font-mono);border-radius:var(--radius-sm);color:var(--text-secondary);border:1px solid var(--border-subtle);background:#efe9df;padding:3px 9px;font-size:11.5px;font-weight:600}.pill-group{border-radius:var(--radius-md);border:1px solid var(--border-card);background:#eae3d6;gap:3px;padding:3px;display:flex}.pill-button{border-radius:calc(var(--radius-md) - 2px);min-width:60px;min-height:34px;color:var(--text-secondary);cursor:pointer;transition:var(--transition);white-space:nowrap;text-align:center;-webkit-user-select:none;user-select:none;touch-action:manipulation;background:0 0;border:none;flex:1;justify-content:center;align-items:center;gap:6px;padding:6px 12px;font-size:12.5px;font-weight:600;display:inline-flex}.pill-button:hover:not(.active){color:var(--text-primary);background:#fff6}.pill-button.active{color:var(--primary);background:#fff;box-shadow:0 2px 6px #00000014}.pattern-tabs-grid{grid-template-columns:repeat(5,1fr);gap:6px;width:100%;display:grid}@media (width<=520px){.pattern-tabs-grid{grid-template-columns:repeat(3,1fr)}}.paper-grid{grid-template-columns:repeat(2,1fr);gap:8px;margin-bottom:12px;display:grid}.paper-card-btn{background:var(--bg-card-subtle);border:1px solid var(--border-card);border-radius:var(--radius-md);cursor:pointer;transition:var(--transition);text-align:left;flex-direction:column;align-items:flex-start;padding:10px 14px;display:flex;position:relative}.paper-card-btn:hover{border-color:var(--primary);background:#fff;transform:translateY(-1px)}.paper-card-btn.active{border-color:var(--primary);box-shadow:0 0 0 1px var(--primary);background:#edf5ff}.paper-card-title{width:100%;color:var(--text-primary);justify-content:space-between;align-items:center;font-size:13px;font-weight:700;display:flex}.paper-card-btn.active .paper-card-title{color:var(--primary)}.paper-card-dims{font-family:var(--font-mono);color:var(--text-muted);margin-top:3px;font-size:11px}.custom-select{border-radius:var(--radius-md);border:1px solid var(--border-card);width:100%;color:var(--text-primary);cursor:pointer;transition:var(--transition);background:#fff;outline:none;padding:9px 12px;font-size:13px;font-weight:500}.custom-select:focus{border-color:var(--primary);box-shadow:0 0 0 2px #2563eb26}.safe-slider-wrapper{flex-direction:column;gap:8px;width:100%;margin-bottom:14px;display:flex}.safe-slider-controls{align-items:center;gap:10px;width:100%;display:flex}.stepper-btn{border-radius:var(--radius-sm);border:1px solid var(--border-card);width:34px;height:34px;color:var(--text-primary);cursor:pointer;transition:var(--transition);touch-action:manipulation;-webkit-user-select:none;user-select:none;box-shadow:var(--shadow-sm);background:#fff;flex-shrink:0;justify-content:center;align-items:center;display:flex}.stepper-btn:hover:not(:disabled){background:var(--bg-surface-hover);border-color:var(--primary);color:var(--primary)}.stepper-btn:active:not(:disabled){background:var(--bg-surface-active);transform:scale(.94)}.stepper-btn:disabled{opacity:.35;cursor:not-allowed}.safe-slider-track-container{cursor:pointer;-webkit-user-select:none;user-select:none;outline:none;flex:1;align-items:center;height:36px;display:flex;position:relative;touch-action:pan-y!important}.safe-slider-track{background:#ded6c9;border-radius:3px;width:100%;height:6px;position:relative;overflow:hidden}.safe-slider-fill{background:var(--primary);border-radius:3px;height:100%;transition:width 50ms ease-out}.safe-slider-thumb{border:2.5px solid var(--primary);pointer-events:none;background:#fff;border-radius:50%;width:22px;height:22px;transition:transform .12s,box-shadow .12s;position:absolute;top:50%;transform:translate(-50%,-50%);box-shadow:0 2px 6px #0003}.safe-slider-track-container:hover .safe-slider-thumb,.safe-slider-thumb.active{transform:translate(-50%,-50%)scale(1.18);box-shadow:0 2px 10px #2563eb66}.slider-container{flex-direction:column;gap:8px;margin-bottom:14px;display:flex}.slider-header{justify-content:space-between;align-items:center;display:flex}.slider-label{color:var(--text-secondary);font-size:12.5px;font-weight:600}.slider-value-badge{font-family:var(--font-mono);border:1px solid var(--border-card);border-radius:var(--radius-sm);color:var(--primary);background:#fff;padding:2px 8px;font-size:12px;font-weight:700}.custom-range{appearance:none;width:100%;height:6px;transition:var(--transition);background:#ded6c9;border-radius:3px;outline:none;touch-action:pan-y!important}.custom-range::-webkit-slider-thumb{appearance:none;border:2.5px solid var(--primary);cursor:pointer;width:20px;height:20px;transition:var(--transition);background:#fff;border-radius:50%;box-shadow:0 2px 5px #0003}.custom-range::-webkit-slider-thumb:hover{transform:scale(1.15);box-shadow:0 2px 8px #2563eb59}.preset-chips{flex-wrap:wrap;align-items:center;gap:8px;margin-top:8px;display:flex}.chip-btn{border-radius:var(--radius-full);border:1px solid var(--border-card);background:var(--bg-card-subtle);min-width:54px;min-height:32px;color:var(--text-secondary);cursor:pointer;transition:var(--transition);text-align:center;white-space:nowrap;-webkit-user-select:none;user-select:none;touch-action:manipulation;box-shadow:var(--shadow-sm);flex-shrink:0;justify-content:center;align-items:center;padding:6px 12px;font-size:12px;font-weight:600;display:inline-flex}.chip-btn:hover{border-color:var(--border-hover);color:var(--text-primary);background:#fff}.chip-btn.active{border-color:var(--primary);color:var(--primary);box-shadow:0 0 0 1px var(--primary);background:#eff6ff;font-weight:700}.color-picker-group{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.color-circle{cursor:pointer;width:28px;height:28px;transition:var(--transition);border:2px solid #0000;border-radius:50%;position:relative;box-shadow:inset 0 0 0 1px #0000001a}.color-circle:hover{transform:scale(1.15)}.color-circle.active{border-color:var(--primary);box-shadow:0 0 0 2px #fff, 0 0 0 4px var(--primary)}.custom-color-input{border:1px solid var(--border-card);cursor:pointer;background:0 0;border-radius:50%;width:32px;height:32px;padding:0;overflow:hidden}.toggle-row{cursor:pointer;justify-content:space-between;align-items:center;gap:14px;padding:10px 0;display:flex}.toggle-info{flex-direction:column;flex:1;display:flex}.toggle-title{color:var(--text-primary);font-size:13px;font-weight:600}.toggle-desc{color:var(--text-muted);font-size:11.5px}.switch{flex-shrink:0;width:44px;height:24px;display:inline-block;position:relative}.switch input{opacity:0;width:0;height:0}.slider-switch{cursor:pointer;transition:var(--transition);background-color:#d1c8b8;border-radius:24px;position:absolute;inset:0}.slider-switch:before{content:"";width:18px;height:18px;transition:var(--transition);background-color:#fff;border-radius:50%;position:absolute;bottom:3px;left:3px;box-shadow:0 1px 3px #0003}input:checked+.slider-switch{background-color:var(--primary)}input:checked+.slider-switch:before{transform:translate(18px)}.preview-panel{flex-direction:column;gap:16px;width:100%;display:flex}.preview-toolbar{background:var(--bg-card);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid var(--border-card);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;width:100%;padding:10px 16px;display:flex}.toolbar-group{align-items:center;gap:8px;display:flex}.zoom-badge{font-family:var(--font-mono);color:var(--text-secondary);text-align:center;min-width:48px;font-size:12px;font-weight:600}.sheet-viewport{border-radius:var(--radius-xl);border:1px solid var(--border-card);-webkit-overflow-scrolling:touch;background:#ede7dc radial-gradient(#dcd4c5 1px,#0000 1px) 0 0/20px 20px;justify-content:center;align-items:center;width:100%;max-width:100%;min-height:600px;padding:36px 20px;display:flex;position:relative;overflow:auto;box-shadow:inset 0 2px 6px #0000000d}.sheet-viewport.fullscreen{z-index:1000;background-color:#e5dfd2;border-radius:0;min-height:100vh;padding:40px;position:fixed;inset:0}.realistic-paper{box-shadow:var(--shadow-paper);-webkit-user-select:none;user-select:none;background-color:#fff;border-radius:2px;transition:transform .15s ease-out,box-shadow .2s;position:relative}.realistic-paper:hover{box-shadow:0 16px 48px -4px #2d231429,0 6px 18px -2px #2d231414}.dimension-tag{font-family:var(--font-mono);color:var(--text-muted);border-radius:var(--radius-sm);border:1px solid var(--border-subtle);pointer-events:none;white-space:nowrap;background:#ffffffe6;padding:2px 8px;font-size:11px;position:absolute}.dimension-width{bottom:-28px;left:50%;transform:translate(-50%)}.dimension-height{transform-origin:50%;top:50%;right:-36px;transform:translateY(-50%)rotate(90deg)}.metrics-card{background:var(--bg-card);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid var(--border-card);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);grid-template-columns:repeat(4,1fr);gap:16px;width:100%;padding:16px 20px;display:grid}.metric-item{flex-direction:column;display:flex}.metric-label{text-transform:uppercase;color:var(--text-muted);letter-spacing:.4px;font-size:11.5px;font-weight:600}.metric-value{font-family:var(--font-mono);color:var(--text-primary);margin-top:2px;font-size:18px;font-weight:700}.metric-sub{color:var(--text-muted);font-size:11px}.modal-overlay{-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);z-index:1100;background:#0f172a8c;justify-content:center;align-items:center;padding:20px;display:flex;position:fixed;inset:0}.modal-content{border-radius:var(--radius-xl);border:1px solid var(--border-card);box-shadow:var(--shadow-lg);background:#fff;flex-direction:column;gap:20px;width:100%;max-width:580px;max-height:90vh;padding:28px;display:flex;overflow-y:auto}.modal-header{justify-content:space-between;align-items:center;display:flex}.modal-title{color:var(--text-primary);font-size:20px;font-weight:800}.modal-close-btn{cursor:pointer;color:var(--text-muted);border-radius:var(--radius-sm);transition:var(--transition);background:0 0;border:none;justify-content:center;align-items:center;padding:4px;display:flex}.modal-close-btn:hover{color:var(--text-primary);background:var(--bg-surface-hover)}.print-tips-box{border-radius:var(--radius-md);background:#f8fafc;border:1px solid #e2e8f0;flex-direction:column;gap:10px;padding:16px;display:flex}.print-tip-item{color:var(--text-secondary);align-items:flex-start;gap:10px;font-size:13px;display:flex}.print-tip-step{color:#334155;font-family:var(--font-mono);background:#e2e8f0;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:22px;height:22px;font-size:11px;font-weight:700;display:flex}@media (width<=1024px){.app-container{padding:16px 14px 88px}.header-wrapper{margin-bottom:16px}.header-title{font-size:22px}.header-actions{width:100%;margin-top:4px}.header-actions .btn{flex:calc(50% - 6px);padding:8px 10px;font-size:12.5px}.header-actions .btn-primary{flex:100%}.mobile-view-tabs,.mobile-floating-bar{display:flex}.mobile-only-quick-action,.main-workspace{display:block}.hide-on-mobile{display:none!important}.sheet-viewport{border-radius:var(--radius-lg);min-height:440px;padding:24px 10px}.dimension-height{font-size:9px;right:-10px}.dimension-width{font-size:9px;bottom:-22px}.metrics-card{grid-template-columns:repeat(2,1fr);gap:12px;padding:14px}.metric-value{font-size:16px}.card{padding:16px}.modal-content{max-width:95vw;padding:20px}}@media (width<=480px){.header-title{font-size:19px}.paper-grid{grid-template-columns:1fr 1fr;gap:6px}.paper-card-btn{padding:8px 10px}.paper-card-title{font-size:12px}.paper-card-dims{font-size:10px}.sheet-viewport{min-height:380px}}@media print{body{background:0 0!important;margin:0!important;padding:0!important}.no-print,.header-wrapper,.controls-panel,.preview-toolbar,.metrics-card,.modal-overlay,.dimension-tag,.mobile-view-tabs,.mobile-floating-bar,.mobile-only-quick-action{display:none!important}.app-container{max-width:none!important;margin:0!important;padding:0!important;display:block!important}.main-workspace{display:block!important}.print-only-container{page-break-inside:avoid!important;break-inside:avoid!important;background:#fff!important;margin:0!important;padding:0!important;display:block!important}.print-only-container svg{width:100%!important;height:100%!important;display:block!important}}