```css
/* Hilangkan margin dan padding halaman */
html,
body {
    margin: 0 !important;
    padding: 0 !important;
    width: 100%;
    background: #ffffff;
}

/* Hilangkan jarak container utama OJS */
.pkp_structure,
.pkp_structure_head,
.pkp_head_wrapper,
.pkp_site_name_wrapper,
.pkp_site_name {
    margin: 0 !important;
    padding: 0 !important;
    width: 100% !important;
    max-width: 100% !important;
}

/* Header/banner memenuhi lebar layar */
.pkp_site_name .is_img {
    display: block;
    width: 100% !important;
    margin: 0 !important;
    padding: 0 !important;
    line-height: 0;
}

/* Gambar banner memenuhi sisi kiri dan kanan */
.pkp_site_name .is_img img {
    display: block !important;
    width: 100% !important;
    max-width: 100% !important;
    height: auto !important;
    max-height: none !important;
    margin: 0 !important;
    padding: 0 !important;
}

/* Hilangkan jarak pada pembungkus header */
.pkp_head_wrapper,
.pkp_site_name_wrapper {
    border: none !important;
}

/* Footer tetap menggunakan pengaturan sebelumnya */
.pkp_brand_footer {
    width: 30%;
    float: left;
}

.pkp_footer_content {
    padding: 2.143rem;
    width: 70%;
    float: right;
}

/* Paragraf konten */
.pkp_structure_main p {
    text-align: justify;
}
```