*{box-sizing:border-box}body{margin:0;font-family:Arial,Helvetica,sans-serif;background:#f3f6fb;color:#1f2937}.page{min-height:100vh;padding:40px 15px}.card{max-width:850px;margin:auto;background:#fff;padding:40px;border-radius:22px;box-shadow:0 15px 50px #00000014}.logo{width:75px;height:75px;margin:auto;border-radius:20px;background:#eef2ff;display:flex;align-items:center;justify-content:center;font-size:38px}h1{text-align:center;margin:20px 0 8px;font-size:36px}.subtitle{text-align:center;color:#6b7280;margin:0 0 20px}.notice{padding:12px 15px;background:#f8fafc;border:1px solid #e5e7eb;border-radius:10px;text-align:center;font-size:13px;margin-bottom:20px}.tabs{display:flex;gap:8px;background:#f3f4f6;padding:5px;border-radius:12px;margin-bottom:25px}.tab{flex:1;border:0;padding:13px;border-radius:9px;background:transparent;cursor:pointer;font-weight:bold;color:#6b7280}.tab.active{background:#fff;color:#111827;box-shadow:0 2px 8px #00000014}.upload{border:2px dashed #cbd5e1;border-radius:18px;padding:40px 20px;text-align:center}.upload input{display:none}.upload label{cursor:pointer;display:block}.icon{font-size:55px}.upload h2{margin:10px 0;font-size:22px}.upload p{color:#6b7280;margin:5px 0 20px}.browse{display:inline-block;padding:13px 25px;background:#4f46e5;color:#fff;border-radius:10px;font-weight:bold}.upload small{display:block;margin-top:15px;color:#9ca3af}.preview{margin-top:20px;padding:18px;background:#f8fafc;border-radius:15px;text-align:center}.preview img{max-width:100%;max-height:300px;border-radius:10px}.preview div{margin-top:10px;color:#6b7280;font-size:14px;word-break:break-word}.group{margin-top:25px}.group>label{display:block;font-weight:bold;margin-bottom:10px}select{width:100%;padding:14px;border:1px solid #d1d5db;border-radius:10px;background:#fff;font-size:16px}input[type=range]{width:100%}.row{display:flex;justify-content:space-between;color:#6b7280;font-size:13px}.row strong{color:#111827}.convert{width:100%;margin-top:30px;padding:17px;border:0;border-radius:12px;background:#111827;color:#fff;font-size:17px;font-weight:bold;cursor:pointer}.list{margin-top:20px;max-height:300px;overflow:auto;border:1px solid #e5e7eb;border-radius:12px;padding:5px}.item{padding:10px 12px;border-bottom:1px solid #f1f5f9;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.supported{text-align:center;border-top:1px solid #e5e7eb;margin-top:35px;padding-top:25px}.formats{display:flex;justify-content:center;flex-wrap:wrap;gap:8px}.formats span{padding:7px 12px;border-radius:20px;background:#eef2ff;font-size:13px;font-weight:bold}.supported p{color:#9ca3af;font-size:12px}footer{text-align:center;color:#6b7280;font-size:13px;margin-top:20px}@media(max-width:600px){.page{padding:15px 10px}.card{padding:25px 18px;border-radius:16px}h1{font-size:28px}}