:root{--primary:#ff6b6b;--secondary:#4ecdc4;--accent:#ffe66d;--background:#f7fff7;--text:#2c3e50;--sidebar-bg:#fff;--sidebar-border:#e8f1f2;--worksheet-bg:#fff}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--background);color:var(--text);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:Nunito,Segoe UI,Tahoma,Geneva,Verdana,sans-serif}.app-container{height:100vh;display:flex;overflow:hidden}.sidebar{background-color:var(--sidebar-bg);border-right:2px solid var(--sidebar-border);z-index:10;flex-direction:column;gap:24px;width:320px;padding:24px;display:flex;overflow-y:auto;box-shadow:2px 0 10px #0000000d}.sidebar-header h1{color:var(--primary);align-items:center;gap:8px;margin-bottom:8px;font-size:1.5rem;display:flex}.sidebar-header p{color:#7f8c8d;font-size:.9rem}.control-group{flex-direction:column;gap:8px;display:flex}.control-group label{color:var(--text);font-size:.95rem;font-weight:700}.control-group select,.control-group input{border:2px solid var(--sidebar-border);border-radius:8px;outline:none;padding:10px 12px;font-family:inherit;font-size:1rem;transition:border-color .2s}.control-group select:focus,.control-group input:focus{border-color:var(--secondary)}.radio-group{gap:12px;display:flex}.radio-label{cursor:pointer;align-items:center;gap:6px;font-size:.95rem;display:flex}.arithmetic-range-panel{border:2px solid var(--sidebar-border);background:#f8fcfc;border-radius:10px;flex-direction:column;gap:8px;padding:12px;display:flex}.range-section-title{color:#5f6f70;font-size:.82rem;font-weight:700}.range-input-row{grid-template-columns:1fr auto 1fr;align-items:center;gap:8px;display:grid}.range-input-row input{border:2px solid var(--sidebar-border);width:100%;min-width:0;font:inherit;border-radius:8px;padding:8px}.checkbox-label{cursor:pointer;align-items:center;gap:8px;font-size:.92rem;font-weight:700;display:flex}.checkbox-label input{width:18px;height:18px;accent-color:var(--secondary)}.preset-summary{color:#536566;background:#f1fbfa;border:2px solid #d7efec;border-radius:10px;flex-direction:column;gap:5px;padding:11px 12px;font-size:.84rem;line-height:1.4;display:flex}.preset-summary strong{color:var(--text);font-size:.88rem}.action-buttons{flex-direction:column;gap:12px;margin-top:auto;display:flex}.btn{cursor:pointer;border:none;border-radius:8px;justify-content:center;align-items:center;gap:8px;padding:12px 20px;font-family:inherit;font-size:1rem;font-weight:700;transition:transform .1s,box-shadow .2s;display:flex}.btn:active{transform:translateY(2px)}.btn-primary{background-color:var(--primary);color:#fff;box-shadow:0 4px #d93838}.btn-primary:active{box-shadow:0 2px #d93838}.btn-secondary{background-color:var(--secondary);color:#fff;box-shadow:0 4px #2a9d8f}.btn-secondary:active{box-shadow:0 2px #2a9d8f}.main-content{background-color:#f4fbfb;background-image:radial-gradient(#4ecdc4 1px,#0000 1px);background-size:20px 20px;flex:1;padding:40px;overflow-y:auto}.worksheet-canvas{background-color:var(--worksheet-bg);border-radius:4px;flex-direction:column;width:210mm;min-height:297mm;margin:0 auto 40px;padding:20mm;display:flex;box-shadow:0 10px 30px #0000001a}@media print{.worksheet-canvas{page-break-after:always;break-after:page;margin-bottom:0}.worksheet-canvas:last-child{page-break-after:auto;break-after:auto}}.worksheet-header{border-bottom:2px dashed #ccc;justify-content:space-between;margin-bottom:2rem;padding-bottom:1rem;display:flex}.name-date-group{flex-direction:column;gap:1rem;width:60%;display:flex}.name-line,.date-line{align-items:flex-end;gap:.5rem;display:flex}.name-line span,.date-line span{width:65px;font-size:1.1rem;font-weight:700;display:inline-block}.line{border-bottom:1px solid #333;flex:1;height:1.5rem}.score-box{border:2px solid #333;border-radius:8px;flex-direction:column;width:100px;height:80px;display:flex}.score-box-title{letter-spacing:1px;border-bottom:2px solid #333;justify-content:center;align-items:center;height:50%;font-size:1.1rem;font-weight:800;display:flex}.worksheet-title{text-align:center;margin-bottom:2rem;font-family:Comic Sans MS,Comic Neue,cursive,sans-serif;font-size:2rem}.worksheet-body{flex-direction:column;flex:1;display:flex}.grid-2col{grid-template-columns:1fr 1fr;align-content:space-between;height:100%;display:grid;position:relative}.grid-1col{grid-template-columns:1fr;align-content:space-between;height:100%;display:grid;position:relative}.grid-2col:before{content:"";z-index:0;border-left:2px dashed #ccc;position:absolute;top:0;bottom:0;left:50%;transform:translate(-50%)}.math-problem,.sequence-problem,.spelling-problem,.compare-problem{z-index:1;break-inside:avoid;page-break-inside:avoid;position:relative}.worksheet-body.density-loose{gap:2rem}.worksheet-body.density-compact{gap:.5rem}.math-problem{align-items:center;gap:1rem;font-family:Comic Sans MS,Comic Neue,cursive,sans-serif;font-size:1.8rem;font-weight:700;display:flex}.math-problem .number{text-align:center;min-width:40px}.math-problem .operator{color:var(--primary)}.math-problem .answer-box{border:2px solid #333;border-radius:8px;width:60px;height:60px}.worksheet-body.density-compact .math-problem{gap:.8rem;font-size:1.4rem}.worksheet-body.density-compact .math-problem .answer-box{width:45px;height:45px}.sequence-problem{justify-content:space-between;align-items:center;width:100%;padding:0 1rem;font-family:Comic Sans MS,Comic Neue,cursive,sans-serif;font-size:1.8rem;font-weight:700;display:flex}.sequence-item{align-items:baseline;display:flex}.grid-1col .sequence-problem{padding:0 3rem}.grid-1col .sequence-problem .number{min-width:60px}.grid-1col .sequence-problem .blank{width:60px}.sequence-problem .number{text-align:center;min-width:40px}.sequence-problem .blank{border-bottom:3px solid #333;width:40px;height:2.5rem}.worksheet-body.density-compact .sequence-problem{font-size:1.4rem}.worksheet-body.density-compact .sequence-problem .blank{height:2rem}.compare-problem{flex-direction:column;width:100%;display:flex}.compare-instruction{margin-bottom:.5rem;font-family:Comic Sans MS,Comic Neue,cursive,sans-serif;font-size:1.5rem}.compare-boxes{border:3px solid #333;grid-template-columns:1fr 1fr;height:160px;display:grid}.compare-box{flex-wrap:wrap;justify-content:center;align-items:center;gap:1rem;padding:1.5rem;display:flex}.compare-box.right{border-left:3px solid #333}.emoji-container{transition:transform .2s;display:inline-flex}.emoji-icon{font-size:3.5rem;line-height:1}.worksheet-body.density-compact .compare-boxes{height:110px}.worksheet-body.density-compact .emoji-icon{font-size:2.5rem}.spelling-problem{align-items:center;gap:1rem;margin-bottom:1rem;display:flex}.spelling-problem .picture-placeholder,.match-item-left .picture-placeholder{border:2px dashed #999;border-radius:12px;justify-content:center;align-items:center;width:80px;height:80px;font-size:2.5rem;display:flex}.spelling-problem .blanks-container,.match-item-right .blanks-container{gap:.25rem;max-width:220px;display:flex}.letter-blank{border-bottom:3px solid #333;justify-content:center;align-items:flex-end;width:28px;min-width:0;height:40px;font-family:Comic Sans MS,Comic Neue,cursive,sans-serif;font-size:1.5rem;display:flex}.worksheet-body.density-compact .spelling-problem{gap:1rem;margin-bottom:.5rem}.worksheet-body.density-compact .spelling-problem .picture-placeholder,.worksheet-body.density-compact .match-item-left .picture-placeholder{width:60px;height:60px;font-size:1.8rem}.worksheet-body.density-compact .letter-blank{width:22px;height:30px;font-size:1.2rem}.letter-blank.filled{border-bottom:3px solid #0000}.match-fill-block{break-inside:avoid;page-break-inside:avoid;width:100%;margin-bottom:2rem}.category-title{color:var(--text);border-bottom:2px solid var(--secondary);margin-bottom:1rem;padding-bottom:.5rem;font-size:1.5rem}.match-container{justify-content:space-between;align-items:stretch;width:100%;display:flex}.match-column{flex-direction:column;gap:1.5rem;display:flex}.left-column{align-items:flex-start;width:20%}.right-column{align-items:flex-start;width:45%}.match-item-left,.match-item-right{align-items:center;height:80px;display:flex}.worksheet-body.density-compact .match-item-left,.worksheet-body.density-compact .match-item-right{height:60px}.anchor-dot{background-color:#555;border-radius:50%;width:12px;height:12px;margin:0 1.5rem}@media print{html,body{background-color:#fff;height:auto!important;overflow:visible!important}.app-container{height:auto!important;display:block!important;overflow:visible!important}.sidebar{display:none!important}.main-content{background:0 0;margin:0;padding:0;height:auto!important;display:block!important;overflow:visible!important}.worksheet-canvas{width:210mm;min-height:297mm;box-shadow:none;page-break-after:always;break-after:page;border-radius:0;margin:0}.worksheet-canvas:last-child{page-break-after:auto;break-after:auto}.grid-1col{flex-direction:column!important;justify-content:space-between!important;height:100%!important;display:flex!important}@page{size:A4;margin:0}}