.seller-container{max-width:600px;margin:auto;padding:40px 20px;font-family:Arial;top:160px}.step-bar{justify-content:space-between;margin-bottom:30px;display:flex}.step-bar div{text-align:center;border-bottom:3px solid #ddd;flex:1;padding:10px;font-size:14px}.step-bar .active{border-color:#f90;font-weight:600}.card{background:#fff;border-radius:8px;flex-direction:column;gap:12px;padding:25px;display:flex;box-shadow:0 3px 10px #0000000d}input{border:1px solid #ddd;border-radius:6px;padding:10px}button{color:#fff;cursor:pointer;background:#f90;border:none;border-radius:6px;padding:12px}.btn-row{justify-content:space-between;margin-top:10px;display:flex}.error{color:red;margin-top:-6px;font-size:12px}