:root{--primary: #6366F1;--primary-dark: #4F46E5;--primary-light: #EEF2FF;--bg-primary: #FFFFFF;--bg-secondary: #F8FAFC;--text-primary: #1E293B;--text-secondary: #64748B;--border-color: #E2E8F0;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .1);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -2px rgba(0, 0, 0, .05);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -4px rgba(0, 0, 0, .05);--radius-md: .375rem;--radius-lg: .5rem}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,system-ui,-apple-system,sans-serif;line-height:1.5;color:var(--text-primary);background-color:var(--bg-secondary);min-height:100vh}.container{max-width:900px;margin:0 auto;padding:1rem}.header{text-align:center;margin-bottom:1.5rem;padding:1rem 0}.header h1{font-size:1.75rem;font-weight:700;background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:.5rem}.subtitle{color:var(--text-secondary);font-size:1rem;font-weight:400}.main-content{background-color:var(--bg-primary);padding:1.5rem;border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);margin-bottom:1rem}.upload-section{text-align:center;margin-bottom:1.5rem;padding:1.5rem;border:2px dashed var(--border-color);border-radius:var(--radius-md);background-color:var(--bg-secondary);transition:all .3s ease}.upload-section:hover{border-color:var(--primary);background-color:var(--primary-light)}.upload-btn{display:inline-flex;align-items:center;gap:.5rem;padding:.5rem 1rem;background-color:var(--primary);color:#fff;border-radius:var(--radius-md);cursor:pointer;font-weight:500;font-size:.875rem;transition:all .2s ease;box-shadow:var(--shadow-md)}.upload-btn:hover{background-color:var(--primary-dark);transform:translateY(-1px)}.upload-icon{width:1.25rem;height:1.25rem}input[type=file]{display:none}.upload-tip{margin-top:.75rem;color:var(--text-secondary);font-size:.75rem}.options-section{margin:1rem auto;padding:.75rem;background-color:var(--bg-secondary);border-radius:var(--radius-md);max-width:400px}.option-item{display:flex;gap:.75rem;justify-content:center;align-items:center;flex-wrap:wrap}.radio-label{display:flex;align-items:center;gap:.375rem;cursor:pointer;padding:.375rem .75rem;border-radius:var(--radius-md);transition:all .2s ease;font-size:.875rem;border:1px solid var(--border-color);background-color:var(--bg-primary)}.radio-label:hover{border-color:var(--primary);background-color:var(--primary-light)}.radio-label input[type=radio]{width:0;height:0;position:absolute;opacity:0}.radio-label input[type=radio]:checked+span{color:var(--primary);font-weight:500}.radio-label.shape-option{position:relative;width:3rem;height:3rem;padding:0;display:flex;align-items:center;justify-content:center;border:2px solid var(--border-color)}.radio-label.shape-option:hover{border-color:var(--primary);background-color:var(--primary-light)}.radio-label.shape-option input[type=radio]:checked+.shape-icon{color:var(--primary)}.radio-label.shape-option input[type=radio]:checked+.shape-icon:after{content:"";position:absolute;inset:-2px;border:2px solid var(--primary);border-radius:var(--radius-md);background-color:var(--primary-light);z-index:-1}.shape-icon{width:1.5rem;height:1.5rem;position:relative;color:var(--text-secondary)}.shape-icon.none{border:2px solid currentColor}.shape-icon.rounded{border:2px solid currentColor;border-radius:.375rem}.shape-icon.circle{border:2px solid currentColor;border-radius:50%}.shape-icon.heart{color:currentColor}.shape-icon.heart:before{content:"♥";font-size:1.5rem;line-height:1}.radio-label.grid-option{position:relative;padding:.5rem 1rem;display:flex;align-items:center;gap:.5rem}.radio-label.grid-option input[type=radio]:checked{color:var(--primary)}.radio-label.grid-option input[type=radio]:checked+.grid-icon{border-color:var(--primary)}.radio-label.grid-option input[type=radio]:checked+.grid-icon+span{color:var(--primary);font-weight:500}.grid-icon{width:1.25rem;height:1.25rem;border:1px solid currentColor;position:relative;display:grid;gap:1px}.grid-icon:before{content:"";position:absolute;inset:0;background-color:currentColor;opacity:.1}.grid-icon.grid-9{grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(3,1fr)}.grid-icon.grid-4{grid-template-columns:repeat(2,1fr);grid-template-rows:repeat(2,1fr)}.preview-section{margin:1.5rem 0}.grid-container{display:grid;grid-template-columns:repeat(3,1fr);gap:.5rem;margin:0 auto;max-width:600px;transition:all .3s ease}.grid-container[data-grid="4"]{grid-template-columns:repeat(2,1fr);max-width:400px;gap:1rem}.grid-container[data-grid="4"] .grid-item{aspect-ratio:1;border:1px solid var(--border-color);border-radius:var(--radius-md);overflow:hidden;transition:all .2s ease;box-shadow:var(--shadow-md)}.grid-item{aspect-ratio:1;border:1px solid var(--border-color);border-radius:var(--radius-md);overflow:hidden;transition:all .2s ease}.grid-item:hover{transform:scale(1.02)}.grid-item img{width:100%;height:100%;object-fit:cover}.button-section{display:flex;gap:1rem;justify-content:center;margin:1.5rem 0;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.5rem 1rem;border:none;border-radius:var(--radius-md);background-color:var(--bg-secondary);color:var(--text-primary);font-size:.875rem;font-weight:500;cursor:pointer;transition:all .2s ease;box-shadow:var(--shadow-sm)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background-color:var(--primary);color:#fff;box-shadow:var(--shadow-md)}.btn-primary:hover:not(:disabled){background-color:var(--primary-dark);transform:translateY(-1px)}.btn-icon{width:1.25rem;height:1.25rem}.image-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:1rem;margin-top:2rem;padding:1rem;background-color:var(--bg-secondary);border-radius:var(--radius-md)}.image-item{position:relative;aspect-ratio:1;border:1px solid var(--border-color);border-radius:var(--radius-md);overflow:hidden;transition:all .2s ease}.image-item:hover{transform:scale(1.02)}.image-item img{width:100%;height:100%;object-fit:cover}.download-btn{position:absolute;bottom:.5rem;right:.5rem;padding:.375rem;border:none;border-radius:var(--radius-md);background-color:var(--primary);color:#fff;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;justify-content:center;opacity:0;transform:translateY(.5rem)}.image-item:hover .download-btn{opacity:1;transform:translateY(0)}.download-btn:hover{background-color:var(--primary-dark)}.download-btn .btn-icon{width:1rem;height:1rem}.footer{text-align:center;padding:1rem;color:var(--text-secondary);font-size:.875rem}@media(max-width:768px){.container{padding:.5rem}.main-content,.upload-section{padding:1rem}.button-section{flex-direction:column}.btn{width:100%;justify-content:center}.grid-container{gap:.25rem}}.navbar{position:fixed;top:0;left:0;right:0;background-color:var(--bg-primary);padding:.75rem 1.5rem;display:flex;justify-content:space-between;align-items:center;box-shadow:var(--shadow-sm);z-index:1000}.nav-logo{display:flex;align-items:center;gap:.5rem;text-decoration:none;color:var(--text-primary);font-weight:500}.nav-logo img{height:2rem;width:auto}.nav-links{list-style:none;display:flex;gap:1rem}.nav-links a{text-decoration:none;color:var(--text-secondary);transition:color .2s ease}.nav-links a:hover{color:var(--primary)}.container{margin-top:4rem}.info-box{background-color:#f8fafc;border-radius:16px;padding:25px;margin-bottom:40px;border-left:4px solid #3498db;box-shadow:0 4px 15px #0000000d}.info-box h2{color:#2c3e50;margin-top:0;margin-bottom:15px;font-size:18px;display:flex;align-items:center}.info-box h2 i{color:#3498db;margin-right:10px}.info-box p{color:#7f8c8d;margin:10px 0;line-height:1.6}.info-box h2{position:relative;color:#2c3e50;margin-top:0;margin-bottom:15px;font-size:18px;display:flex;align-items:center}.info-box h2:after{content:"";position:absolute;bottom:-4px;left:0;width:60px;height:2px;background:linear-gradient(90deg,#3498db,transparent)}