*{box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:linear-gradient(135deg,#f3f3f3,#dce6f8);min-height:100vh;margin:0;padding:20px}.container{max-width:800px;margin:0 auto;background:#fff;border-radius:20px;box-shadow:0 20px 40px #0000001a;overflow:hidden}.header{padding:30px;text-align:center;position:relative}.language-toggle{position:absolute;top:20px;right:20px;background:linear-gradient(135deg,#a0c878,#b0db9c);color:#fff;border:none;padding:10px 15px;border-radius:20px;font-weight:600;cursor:pointer;transition:all .3s ease;font-size:.9rem}.language-toggle:hover{transform:translateY(-2px);box-shadow:0 8px 20px #f6ab7a66}.header h1{margin:0;font-size:2.5rem;font-weight:700;font-family:Bitcount,Inter,sans-serif;color:#2d3748;text-shadow:0 2px 4px rgba(0,0,0,.1)}.header h3{margin:10px 0;font-weight:600;font-family:Inter,sans-serif;color:#4a5568}.tagline{color:#718096;font-size:.9rem;font-style:italic;margin:10px 0}.upload-section{background:#f3f3f3;border:2px dashed #dce6f8;border-radius:15px;padding:40px;text-align:center;margin-bottom:30px;transition:all .3s ease;cursor:pointer;position:relative}.upload-section:hover{border-color:#a0c878;background:#faf9f8;transform:translateY(-2px)}.upload-section.dragover{border-color:#a0c878;background:#faf9f8;transform:scale(1.02)}.upload-icon{font-size:3rem;margin-bottom:15px;color:#a0c878}.upload-text{font-size:1.2rem;font-weight:600;color:#2d3748;margin-bottom:10px}.upload-subtext{color:#718096;font-size:.9rem}#videoInput{display:none}.settings-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:25px;margin-bottom:30px}.setting-group{background:linear-gradient(135deg,#f3f3f3,#dce6f8);padding:25px;border-radius:15px;border:2px solid #e2e8f0;position:relative;transition:all .3s ease}.setting-group:hover{border-color:#a0c878;box-shadow:0 8px 25px #f6ab7a26;transform:translateY(-2px);position:relative;z-index:1}.tooltip{position:absolute;bottom:-80px;left:0;right:0;margin:0 auto;width:320px;transform:translateY(-10px);background:linear-gradient(135deg,#2d3748,#1a202c);color:#fff;padding:15px 20px;border-radius:12px;font-size:.85rem;text-align:center;line-height:1.5;z-index:2000;pointer-events:none;opacity:0;transition:all .3s ease;box-shadow:0 10px 30px #0000004d}.tooltip:after{content:"";position:absolute;top:-10px;left:50%;transform:translate(-50%);width:0;height:0;border-left:10px solid transparent;border-right:10px solid transparent;border-bottom:10px solid #2d3748}.tooltip.show{opacity:1;transform:translateY(0)}.setting-group label{display:block;font-weight:700;color:#2d3748;margin-bottom:12px;font-size:1rem}.setting-group input{width:100%;padding:15px;border:2px solid #e2e8f0;border-radius:10px;font-size:1rem;transition:all .3s ease;background:#fff;font-weight:500}.setting-group input:focus{outline:none;border-color:#a0c878;box-shadow:0 0 0 4px #f6ab7a1a;background:#fff}.convert-btn{width:100%;background:linear-gradient(135deg,#a0c878,#b0db9c);color:#fff;border:none;padding:20px 30px;border-radius:15px;font-size:1.2rem;font-weight:700;cursor:pointer;transition:all .3s ease;margin-bottom:30px;text-transform:uppercase;letter-spacing:1.5px;position:relative;overflow:hidden}.convert-btn:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent);transition:left .5s ease}.convert-btn:hover:not(:disabled):before{left:100%}.convert-btn:hover:not(:disabled){transform:translateY(-3px);box-shadow:0 15px 35px #f6ab7a66}.convert-btn:disabled{background:#cbd5e0;cursor:not-allowed;transform:none;box-shadow:none}.preview-section,.output-section{margin-bottom:30px}.section-title{font-size:1.5rem;font-weight:800;color:#2d3748;margin-bottom:20px;display:flex;align-items:center;gap:12px;padding-bottom:10px;border-bottom:3px solid #dce6f8}#preview{display:flex;gap:15px;overflow-x:auto;padding:20px;background:linear-gradient(135deg,#f8f9ff,#f0f2ff);border-radius:15px;border:2px solid #e1e5f2}#preview::-webkit-scrollbar{height:10px}#preview::-webkit-scrollbar-track{background:#f1f1f1;border-radius:5px}#preview::-webkit-scrollbar-thumb{background:linear-gradient(135deg,#a0c878,#b0db9c);border-radius:5px}#preview img{max-height:100px;border-radius:10px;box-shadow:0 6px 15px #0003;transition:all .3s ease;border:2px solid white}#preview img:hover{transform:scale(1.1) rotate(2deg);box-shadow:0 10px 25px #0000004d}.output-section{text-align:center}#output img{max-width:100%;border-radius:15px;box-shadow:0 15px 40px #0000004d;margin-bottom:25px;border:3px solid white}#downloadLink{display:inline-block;background:linear-gradient(135deg,#48bb78,#38a169);color:#fff;text-decoration:none;padding:18px 40px;border-radius:50px;font-weight:700;font-size:1.2rem;transition:all .3s ease;box-shadow:0 8px 20px #48bb7866;margin-bottom:20px;text-transform:uppercase;letter-spacing:1px;position:relative;overflow:hidden}#downloadLink:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.3),transparent);transition:left .5s ease}#downloadLink:hover:before{left:100%}#downloadLink:hover{transform:translateY(-3px);box-shadow:0 12px 30px #48bb7880}.advanced-settings{background:linear-gradient(135deg,#f3f3f3,#dce6f8);border-radius:20px;padding:0;margin-top:30px;border:2px solid #e2e8f0;overflow:hidden;box-shadow:0 10px 30px #0000001a}.advanced-settings-header{background:linear-gradient(135deg,#2d3748,#1a202c);color:#fff;display:flex;align-items:center;justify-content:space-between;cursor:pointer;padding:20px 25px;transition:all .3s ease}.advanced-settings-header:hover{background:linear-gradient(135deg,#1a202c,#171923)}.advanced-settings-title{font-size:1.3rem;font-weight:700;display:flex;align-items:center;gap:12px}.toggle-icon{font-size:1.5rem;transition:transform .4s ease;font-weight:700}.toggle-icon.rotated{transform:rotate(180deg)}.advanced-content{max-height:0;overflow:hidden;transition:max-height .4s ease;padding:0 25px}.advanced-content.expanded{max-height:800px;padding:25px}.quality-badge{background:linear-gradient(135deg,gold,#ffed4e);color:#2d3748;padding:10px 20px;border-radius:25px;font-weight:700;font-size:.9rem;margin-bottom:20px;display:inline-block;box-shadow:0 4px 12px #ffd7004d}canvas,video{display:none}.loading{display:flex;align-items:center;justify-content:center;gap:15px;color:#2d3748;font-weight:700;font-size:1.1rem}.spinner{width:24px;height:24px;border:3px solid #e2e8f0;border-top:3px solid #A0C878;border-radius:50%;animation:spin 1s linear infinite}.site-footer{text-align:center;padding:12px 0;font-size:14px;color:#555;position:relative;margin-top:40px}.site-footer a{color:inherit;text-decoration:none;display:inline-flex;align-items:center;gap:6px;transition:color .2s ease-in-out}.site-footer a:hover{color:#a0c878}.github-icon{width:18px;height:18px}.footer{text-align:center;margin-top:20px}.github-link{color:#333;text-decoration:none}.github-link:hover{color:#000}.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@media (max-width: 768px){.settings-grid{grid-template-columns:1fr}.tooltip{width:280px;font-size:.8rem;bottom:-70px}.header h1{font-size:2.5rem}.content{padding:25px 20px}.language-toggle{position:static;margin-bottom:20px}}