*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

body{
    background:#f3f4f6;
    font-family:Arial,sans-serif;
}

.ptt-wrap{
    max-width:1200px;
    margin:40px auto;
    padding:20px;
}

.title{
    text-align:center;
    font-size:60px;
    margin-bottom:40px;
    color:#111827;
}

.upload-box{
    background:#fff;
    padding:30px;
    border-radius:25px;
    box-shadow:0 10px 30px rgba(0,0,0,0.05);
}

.upload-label{
    display:block;
    border:2px dashed #ddd;
    border-radius:25px;
    padding:80px 20px;
    text-align:center;
    cursor:pointer;
    transition:0.3s;
}

.upload-label:hover{
    border-color:#ff3131;
}

.plus{
    width:90px;
    height:90px;
    border-radius:50%;
    background:#ff3131;
    color:#fff;
    font-size:55px;
    display:flex;
    align-items:center;
    justify-content:center;
    margin:auto auto 25px;
    font-weight:bold;
}

.upload-label h2{
    font-size:42px;
    margin-bottom:15px;
    color:#111827;
}

.upload-label p{
    font-size:20px;
    color:#666;
}

#preview_area{
    margin-top:30px;
}

.card{
    background:#fff;
    padding:25px;
    border-radius:18px;
    font-size:20px;
    box-shadow:0 5px 20px rgba(0,0,0,0.05);
}

#language{
    width:100%;
    margin-top:30px;
    padding:22px;
    border-radius:15px;
    border:1px solid #ddd;
    font-size:20px;
    outline:none;
    background:#fff;
}

#translate_btn{
    width:100%;
    background:#ff3131;
    color:#fff;
    border:none;
    padding:25px;
    border-radius:18px;
    font-size:30px;
    font-weight:700;
    cursor:pointer;
    margin-top:30px;
    transition:0.3s;
}

#translate_btn:hover{
    background:#e11d48;
}

#translate_btn:disabled{
    opacity:0.7;
    cursor:not-allowed;
}

#result{
    margin-top:30px;
    text-align:center;
}

.success{
    color:green;
    font-size:24px;
    font-weight:700;
    margin-bottom:20px;
}

.error{
    color:red;
    font-size:22px;
    font-weight:700;
}

.download-btn{
    display:inline-block;
    background:#16a34a;
    color:#fff;
    padding:18px 35px;
    border-radius:14px;
    text-decoration:none;
    font-size:24px;
    font-weight:700;
    transition:0.3s;
}

.download-btn:hover{
    background:#15803d;
}

@media(max-width:768px){

    .title{
        font-size:42px;
    }

    .upload-label{
        padding:50px 15px;
    }

    .upload-label h2{
        font-size:28px;
    }

    .upload-label p{
        font-size:18px;
    }

    #translate_btn{
        font-size:24px;
        padding:20px;
    }

    .download-btn{
        width:100%;
    }

}