.spdf-container{
    max-width:1000px;
    margin:40px auto;
    background:#fff;
    border-radius:24px;
    padding:40px;
    box-shadow:0 12px 30px rgba(0,0,0,0.08);
    font-family:Arial,sans-serif;
}

.spdf-header{
    display:flex;
    align-items:center;
    gap:20px;
    margin-bottom:30px;
}

.spdf-icon{
    width:80px;
    height:80px;
    background:#2563eb;
    border-radius:20px;
    display:flex;
    align-items:center;
    justify-content:center;
}

.spdf-icon i{
    color:#fff;
    font-size:34px;
}

.spdf-header h2{
    margin:0;
    font-size:44px;
}

.spdf-header p{
    margin-top:8px;
    color:#6b7280;
}

.spdf-upload-label{
    border:2px dashed #d1d5db;
    border-radius:24px;
    min-height:260px;
    display:flex;
    flex-direction:column;
    justify-content:center;
    align-items:center;
    cursor:pointer;
    background:#fafafa;
    transition:0.3s;
}

.spdf-upload-label:hover{
    background:#eff6ff;
    border-color:#2563eb;
}

.spdf-upload-label i{
    font-size:60px;
    color:#2563eb;
    margin-bottom:20px;
}

.spdf-upload-label h3{
    font-size:34px;
    margin:0;
}

.spdf-file-item{
    display:flex;
    justify-content:space-between;
    align-items:center;
    margin-top:20px;
    background:#f9fafb;
    border:1px solid #e5e7eb;
    border-radius:14px;
    padding:18px;
}

.spdf-file-left{
    display:flex;
    align-items:center;
    gap:14px;
}

.spdf-file-left i{
    color:#ef4444;
    font-size:22px;
}

.spdf-range-box{
    margin-top:25px;
}

.spdf-range-box label{
    display:block;
    margin-bottom:10px;
    font-weight:600;
}

#spdf-pages{
    width:100%;
    padding:18px;
    border-radius:14px;
    border:1px solid #d1d5db;
    font-size:16px;
}

#spdf-split-btn{
    width:100%;
    margin-top:25px;
    background:#2563eb;
    color:#fff;
    border:none;
    padding:20px;
    border-radius:16px;
    font-size:20px;
    font-weight:700;
    cursor:pointer;
}

#spdf-split-btn:hover{
    background:#1d4ed8;
}

.spdf-loading{
    margin-top:30px;
    display:flex;
    align-items:center;
    justify-content:center;
    gap:12px;
    color:#2563eb;
    font-weight:600;
}

.spdf-loader{
    width:20px;
    height:20px;
    border:3px solid #dbeafe;
    border-top-color:#2563eb;
    border-radius:50%;
    animation:spin 0.8s linear infinite;
}

@keyframes spin{
    to{
        transform:rotate(360deg);
    }
}

.spdf-success-box{
    margin-top:40px;
    background:#fff;
    border-radius:24px;
    padding:40px;
    text-align:center;
}

.spdf-success-icon{
    width:80px;
    height:80px;
    margin:auto;
    border-radius:20px;
    background:#22c55e;
    display:flex;
    align-items:center;
    justify-content:center;
}

.spdf-success-icon i{
    color:#fff;
    font-size:42px;
}

.spdf-success-box h2{
    font-size:52px;
    margin-top:20px;
    margin-bottom:20px;
}

.spdf-file-name{
    font-size:24px;
    color:#374151;
    margin-bottom:30px;
}

.spdf-download-btn{
    display:flex;
    align-items:center;
    justify-content:center;
    gap:12px;
    width:100%;
    background:#2563eb;
    color:#fff;
    text-decoration:none;
    padding:22px;
    border-radius:14px;
    font-size:28px;
    font-weight:700;
}

.spdf-download-btn:hover{
    background:#1d4ed8;
}

.spdf-action-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:14px;
    margin-top:25px;
}

.spdf-small-btn{
    height:70px;
    border:none;
    border-radius:14px;
    background:#f3f4f6;
    font-size:24px;
    cursor:pointer;
}

.spdf-small-btn:hover{
    background:#e5e7eb;
}

.spdf-error-box{
    margin-top:30px;
    background:#fef2f2;
    border:1px solid #fecaca;
    color:#dc2626;
    padding:18px;
    border-radius:14px;
    text-align:center;
    font-weight:600;
}

@media(max-width:768px){

    .spdf-container{
        padding:20px;
    }

    .spdf-header{
        flex-direction:column;
        text-align:center;
    }

    .spdf-header h2{
        font-size:34px;
    }

    .spdf-success-box h2{
        font-size:36px;
    }

    .spdf-download-btn{
        font-size:22px;
    }

}