body {
    margin:0;
    font-family: Arial;
    background:#0b0b0f;
    color:#eaeaea;
}

.container {
    max-width:1100px;
    margin:auto;
    padding:30px 18px;
}

.header {
    text-align:center;
    padding:30px;
}

.header h1 {
    font-size:34px;
}

.layout {
    display:flex;
    gap:20px;
    margin-top:20px;
}

.panel {
    background:rgba(20,20,32,0.85);
    border:1px solid rgba(255,255,255,0.06);
    border-radius:16px;
    padding:20px;
    backdrop-filter: blur(12px);
}

.left {
    flex:1;
}

.right {
    flex:1.3;
}

.upload-box {
    border:2px dashed rgba(255,255,255,0.2);
    padding:35px;
    text-align:center;
    border-radius:14px;
    cursor:pointer;
    margin-bottom:15px;
    position:relative;
}

.upload-box input {
    position:absolute;
    inset:0;
    opacity:0;
}

.upload-icon {
    font-size:40px;
    color:#ff0000;
}

input[type="range"] {
    width:100%;
}

button {
    width:100%;
    padding:14px;
    margin-top:10px;
    background:linear-gradient(90deg,#ff0000,#cc0000);
    border:none;
    color:#fff;
    border-radius:10px;
    cursor:pointer;
}

.zip-btn {
    background:#1e1e2a;
}

.preview {
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
    gap:10px;
}

.img-card {
    background:#0f0f15;
    padding:10px;
    border-radius:12px;
    text-align:center;
}

.img-card img {
    width:100%;
    border-radius:10px;
}

.btn {
    display:inline-block;
    margin-top:8px;
    padding:8px;
    background:#1e1e2a;
    color:#fff;
    text-decoration:none;
    border-radius:8px;
}

.footer {
    text-align:center;
    margin-top:50px;
    padding:20px;
    font-size:13px;
    color:#666;
}

@media(max-width:900px){
    .layout { flex-direction:column; }
}