:root{--primary: #4f46e5;--primary-dark: #4338ca;--primary-light: #e0e7ff;--secondary: #f472b6;--dark: #1e293b;--dark-gray: #334155;--medium-gray: #64748b;--light-gray: #e2e8f0;--light: #f8fafc;--border-radius: 12px;--border-radius-sm: 8px;--box-shadow: 0 4px 6px -1px rgba(0, 0, 0, .1);--box-shadow-md: 0 10px 15px -3px rgba(0, 0, 0, .1)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,system-ui,-apple-system,sans-serif;line-height:1.6;color:var(--dark);background-color:#f1f5f9}.container{max-width:1200px;margin:0 auto;padding:2rem 1rem}article{background:#fff;border-radius:var(--border-radius);box-shadow:var(--box-shadow);padding:2rem;margin-bottom:2rem}h1,h2,h3,h4{color:var(--dark);font-weight:700;margin-bottom:1rem;line-height:1.3}h1{font-size:2.5rem;margin-bottom:1.5rem}h2{font-size:2rem;margin-top:2.5rem;margin-bottom:1.25rem}h3{font-size:1.5rem}p{margin-bottom:1rem;font-size:1.1rem;line-height:1.7}.lead{font-size:1.25rem;color:var(--dark);max-width:800px;margin-left:auto;margin-right:auto}.highlight{color:var(--primary)}.hero{text-align:center;padding:2rem 0;margin-bottom:2rem}.upload-area{border:2px dashed var(--light-gray);border-radius:var(--border-radius);padding:3rem 2rem;text-align:center;margin:2rem 0;transition:all .3s ease;background-color:#fff;cursor:pointer}.upload-area:hover,.upload-area.highlight{border-color:var(--primary);background-color:#4f46e50d}.upload-icon{margin:0 auto 1rem;color:var(--medium-gray)}#image-upload{display:none}.conversion-layout{display:grid;grid-template-columns:1fr;gap:2rem}@media (min-width: 992px){.conversion-layout{grid-template-columns:1fr 1fr}}.image-column{display:flex;flex-direction:column}.image-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(100px,1fr));gap:10px;margin-bottom:20px;max-height:220px;overflow-y:auto;padding:10px;border-radius:8px;background-color:#f8fafc}.thumbnail{position:relative;aspect-ratio:1;border-radius:6px;overflow:hidden;cursor:pointer;border:2px solid transparent;transition:all .2s ease}.thumbnail.selected{border-color:var(--primary);box-shadow:0 0 0 2px #4f46e54d}.thumbnail img{width:100%;height:100%;object-fit:cover}.image-container{background:#fff;border-radius:var(--border-radius);padding:1.5rem;box-shadow:var(--box-shadow);margin-bottom:1.5rem;height:100%}.image-wrapper{background:#f8fafc;border-radius:var(--border-radius-sm);display:flex;align-items:center;justify-content:center;margin-bottom:1.5rem;overflow:hidden;max-height:400px}.preview-image{max-width:100%;max-height:100%;object-fit:contain;display:block}.image-info{background:var(--light);border-radius:var(--border-radius-sm);padding:1.25rem}.info-row{display:flex;justify-content:space-between;margin-bottom:.75rem;font-size:.95rem}.info-row:last-child{margin-bottom:0}.info-label{color:var(--medium-gray);font-weight:500}.info-value{color:var(--dark);font-weight:600}.controls-column{display:flex;flex-direction:column}.control-group{display:flex;flex-direction:column;gap:1.5rem;padding:1.5rem;background:#fff;border-radius:var(--border-radius);box-shadow:var(--box-shadow);height:100%}.section-label{display:block;margin-bottom:.75rem;font-weight:600;color:var(--dark)}.format-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:.75rem;margin-bottom:1rem}.format-option{border:1px solid var(--light-gray);border-radius:var(--border-radius-sm);padding:.75rem;background:#fff;cursor:pointer;transition:all .2s;text-align:left}.format-option.active{background:var(--primary-light);border-color:var(--primary);box-shadow:0 0 0 1px var(--primary)}.format-option:hover{border-color:var(--primary)}.format-name{display:block;font-weight:600;color:var(--dark);margin-bottom:.25rem}.format-desc{display:block;font-size:.8rem;color:var(--medium-gray)}.quality-control{margin-bottom:1.5rem}#quality-slider{width:100%;height:8px;border-radius:4px;background:#e2e8f0;outline:none;-webkit-appearance:none;margin-bottom:.5rem}#quality-slider::-webkit-slider-thumb{-webkit-appearance:none;width:18px;height:18px;border-radius:50%;background:var(--primary);cursor:pointer;box-shadow:0 1px 3px #0000001a}#quality-slider::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:var(--primary);cursor:pointer;box-shadow:0 1px 3px #0000001a}#quality-value{color:var(--primary);font-weight:700}.quality-ticks{display:flex;justify-content:space-between;font-size:.8rem;color:var(--medium-gray)}.advanced-options{margin-bottom:1rem}.checkbox-group{display:flex;flex-direction:column;gap:.75rem}.checkbox-label{display:flex;align-items:center;position:relative;padding-left:28px;cursor:pointer;font-size:.95rem;user-select:none}.checkbox-label input{position:absolute;opacity:0;cursor:pointer;height:0;width:0}.checkmark{position:absolute;left:0;height:18px;width:18px;background-color:#fff;border:1px solid var(--light-gray);border-radius:4px}.checkbox-label:hover input~.checkmark{border-color:var(--primary)}.checkbox-label input:checked~.checkmark{background-color:var(--primary);border-color:var(--primary)}.checkmark:after{content:"";position:absolute;display:none}.checkbox-label input:checked~.checkmark:after{display:block}.checkbox-label .checkmark:after{left:6px;top:2px;width:5px;height:10px;border:solid white;border-width:0 2px 2px 0;transform:rotate(45deg)}.button-group{display:flex;flex-direction:column;gap:1rem;margin-top:auto}button{padding:.875rem 1.5rem;border:none;border-radius:var(--border-radius-sm);font-weight:600;cursor:pointer;transition:all .2s;display:flex;align-items:center;justify-content:center;gap:.5rem}button svg{flex-shrink:0}.primary{background:var(--primary);color:#fff}.primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:var(--box-shadow)}.secondary{background:#fff;color:var(--primary);border:1px solid var(--primary)}.secondary:hover{background:#f8fafc;transform:translateY(-2px)}@media (max-width: 768px){h1{font-size:2rem}h2{font-size:1.75rem}.hero{padding:1rem 0}.format-grid{grid-template-columns:1fr}}