*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family:Arial,Helvetica,sans-serif;
}

body{
    background:#f4f7fb;
    color:#222;
}

header{
    background:#2563eb;
    color:#fff;
    text-align:center;
    padding:40px 20px;
}

header h1{
    font-size:38px;
    margin-bottom:10px;
}

header p{
    opacity:.9;
}

.container{
    max-width:1100px;
    margin:30px auto;
    background:#fff;
    border-radius:15px;
    padding:25px;
    box-shadow:0 10px 30px rgba(0,0,0,.1);
}

/* Upload Area */

.drop-area{
    border:3px dashed #2563eb;
    border-radius:15px;
    padding:50px 20px;
    text-align:center;
    cursor:pointer;
    transition:.3s;
}

.drop-area:hover{
    background:#eef5ff;
}

.drop-area.dragover{
    background:#dbeafe;
    border-color:#1d4ed8;
}

#chooseBtn{
    margin-top:20px;
    background:#2563eb;
    color:#fff;
    border:none;
    padding:14px 28px;
    border-radius:8px;
    cursor:pointer;
    font-size:16px;
    transition:.3s;
}

#chooseBtn:hover{
    background:#1d4ed8;
}

/* Controls */

.controls{
    margin-top:30px;
}

.controls label{
    display:block;
    margin-bottom:8px;
    font-weight:bold;
}

#quality{
    width:100%;
}

#qualityValue{
    display:inline-block;
    margin-top:10px;
    font-weight:bold;
    color:#2563eb;
}

#maxWidth,
#maxHeight,
#maxFileSize{

    width:100%;
    padding:12px;
    border:1px solid #ccc;
    border-radius:8px;
    font-size:16px;
}

#compressBtn{

    width:100%;
    margin-top:20px;
    padding:15px;
    border:none;
    background:#16a34a;
    color:#fff;
    border-radius:8px;
    cursor:pointer;
    font-size:18px;
    transition:.3s;
}

#compressBtn:hover{

    background:#15803d;

}

/* Progress */

.progress-container{

    width:100%;
    height:18px;
    background:#ddd;
    border-radius:50px;
    overflow:hidden;
    margin-top:30px;

}

.progress-bar{

    width:0%;
    height:100%;
    background:linear-gradient(
        90deg,
        #22c55e,
        #16a34a
    );

    transition:width .3s;
}

#progressText{

    margin-top:12px;
    text-align:center;
    font-weight:bold;
    color:#2563eb;

}

/* Statistics */

.stats{

    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:20px;
    margin-top:30px;

}

.stats div{

    background:#f8fafc;
    padding:20px;
    border-radius:10px;
    text-align:center;
    font-weight:bold;

}

.stats span{

    display:block;
    margin-top:10px;
    color:#2563eb;

}

/* Preview */

.preview{

    display:grid;
    grid-template-columns:1fr 1fr;
    gap:20px;
    margin-top:30px;

}

.preview div{

    background:#fafafa;
    padding:15px;
    border-radius:10px;
    text-align:center;

}

.preview img{

    width:100%;
    max-height:350px;
    object-fit:contain;
    margin-top:15px;

}

/* Download */

#downloadBtn{

    display:block;
    margin-top:30px;
    text-align:center;
    background:#ef4444;
    color:#fff;
    padding:16px;
    border-radius:8px;
    text-decoration:none;
    font-size:18px;
    opacity:.5;
    pointer-events:none;
    transition:.3s;

}

#downloadBtn.active{

    opacity:1;
    pointer-events:auto;

}

#downloadBtn:hover{

    background:#dc2626;

}

/* Responsive */

@media(max-width:768px){

    .preview{

        grid-template-columns:1fr;

    }

    .stats{

        grid-template-columns:1fr;

    }

    header h1{

        font-size:30px;

    }

    .drop-area{

        padding:30px 15px;

    }

}
.hero-content{
    max-width:900px;
    margin:30px auto;
    text-align:center;
    padding:20px;
}

.hero-content h2{
    font-size:32px;
    color:#2563eb;
    margin-bottom:15px;
}

.hero-content p{
    font-size:18px;
    color:#555;
    line-height:1.8;
}
/* FAQ Section */

.faq{

    max-width:1000px;

    margin:50px auto;

    padding:20px;

}

.faq h2{

    text-align:center;

    font-size:32px;

    color:#2563eb;

    margin-bottom:30px;

}

.faq-item{

    background:#ffffff;

    padding:20px;

    margin-bottom:15px;

    border-radius:10px;

    box-shadow:0 5px 15px rgba(0,0,0,.08);

}

.faq-item h3{

    color:#222;

    margin-bottom:10px;

}

.faq-item p{

    color:#666;

    line-height:1.7;

}
/* ==========================
   Footer
========================== */

.footer{
    background:#111827;
    color:#fff;
    padding:30px 20px;
    margin-top:60px;
}

.footer-container{
    max-width:1200px;
    margin:auto;
    text-align:center;
}

.footer-links{
    display:flex;
    justify-content:center;
    flex-wrap:wrap;
    gap:30px;
    margin-bottom:20px;
}

.footer-links a{
    color:#ffffff;
    text-decoration:none;
    font-size:16px;
    font-weight:500;
    transition:0.3s;
}

.footer-links a:hover{
    color:#3b82f6;
}

.footer p{
    color:#d1d5db;
    font-size:15px;
}

@media(max-width:768px){

.footer-links{

    flex-direction:column;

    gap:15px;

}

}
/* ==========================
   Navigation Bar
========================== */

.navbar{

    display:flex;

    justify-content:space-between;

    align-items:center;

    padding:18px 40px;

    background:#2563eb;

}

.logo{

    color:#fff;

    font-size:24px;

    font-weight:bold;

}

.nav-links{

    display:flex;

    list-style:none;

    gap:25px;

}

.nav-links a{

    color:#fff;

    text-decoration:none;

    font-size:16px;

    transition:0.3s;

}

.nav-links a:hover{

    color:#ffd700;

}

@media(max-width:768px){

.navbar{

    flex-direction:column;

    gap:15px;

}

.nav-links{

    flex-wrap:wrap;

    justify-content:center;

}

}
/* ==========================
   Features Section
========================== */

.features{

    margin-top:50px;

    text-align:center;

}

.features h2{

    font-size:30px;

    margin-bottom:30px;

    color:#222;

}

.feature-box{

    display:grid;

    grid-template-columns:repeat(auto-fit,minmax(220px,1fr));

    gap:20px;

}

.feature-card{

    background:#f8fafc;

    padding:25px;

    border-radius:12px;

    box-shadow:0 4px 10px rgba(0,0,0,.08);

    font-size:18px;

    font-weight:600;

    transition:0.3s;

}

.feature-card:hover{

    transform:translateY(-5px);

    box-shadow:0 8px 18px rgba(0,0,0,.15);

}



/* ==========================
   Supported Formats
========================== */

.formats{

    margin-top:60px;

    text-align:center;

}

.formats h2{

    font-size:30px;

    margin-bottom:30px;

    color:#222;

}

.format-box{

    display:grid;

    grid-template-columns:repeat(auto-fit,minmax(180px,1fr));

    gap:20px;

}

.format-card{

    background:#2563eb;

    color:#fff;

    padding:30px;

    border-radius:12px;

    font-size:22px;

    font-weight:bold;

    box-shadow:0 5px 15px rgba(0,0,0,.15);

    transition:0.3s;

}

.format-card:hover{

    transform:translateY(-5px);

    background:#1d4ed8;

}


/* ==========================
   How It Works
========================== */

.how-it-works{

    margin-top:60px;

    text-align:center;

}

.how-it-works h2{

    font-size:32px;

    margin-bottom:35px;

    color:#222;

}

.steps{

    display:grid;

    grid-template-columns:repeat(auto-fit,minmax(250px,1fr));

    gap:25px;

}

.step-card{

    background:#ffffff;

    border-radius:15px;

    padding:30px;

    box-shadow:0 8px 20px rgba(0,0,0,.08);

    transition:0.3s;

}

.step-card:hover{

    transform:translateY(-6px);

}

.step-number{

    width:60px;

    height:60px;

    background:#2563eb;

    color:#fff;

    border-radius:50%;

    display:flex;

    align-items:center;

    justify-content:center;

    margin:auto;

    font-size:24px;

    font-weight:bold;

}

.step-card h3{

    margin-top:20px;

    margin-bottom:15px;

    font-size:22px;

}

.step-card p{

    color:#555;

    line-height:1.6;

}

/* ==========================
   Back To Top Button
========================== */

#topBtn{

    display:none;

    position:fixed;

    bottom:30px;

    right:30px;

    z-index:999;

    border:none;

    outline:none;

    background:#2563eb;

    color:white;

    cursor:pointer;

    width:50px;

    height:50px;

    border-radius:50%;

    font-size:24px;

    transition:.3s;

    box-shadow:0 5px 15px rgba(0,0,0,.3);

}

#topBtn:hover{

    background:#1d4ed8;

    transform:scale(1.1);

}

/* ==========================
   Dark Mode Button
========================== */

#themeToggle{

    background:#ffffff;

    color:#2563eb;

    border:none;

    width:45px;

    height:45px;

    border-radius:50%;

    cursor:pointer;

    font-size:22px;

    transition:.3s;

}

#themeToggle:hover{

    transform:rotate(20deg);

}


/* ==========================
   Dark Theme
========================== */

body.dark{

    background:#111827;

    color:#ffffff;

}

body.dark header{

    background:#1f2937;

}

body.dark .container{

    background:#1f2937;

}

body.dark .stats div,
body.dark .preview div,
body.dark .feature-card,
body.dark .step-card,
body.dark .format-card{

    background:#374151;

    color:#ffffff;

}

body.dark .drop-area{

    border-color:#60a5fa;

}

body.dark .controls input,
body.dark .controls select{

    background:#374151;

    color:#ffffff;

    border:1px solid #555;

}

body.dark h1,
body.dark h2,
body.dark h3,
body.dark p,
body.dark label{

    color:#ffffff;

}

body.dark .faq{

    background:#1f2937;

}

body.dark .faq-item{

    background:#374151;

    color:#ffffff;

}

body.dark footer{

    background:#000;

}