```css
/* =========================================
   OJS TRAINING — UIN AR-RANIRY
   Modern Islamic Academic
   ========================================= */

:root {
    --primary: #087f5b;
    --primary-dark: #056448;
    --navy: #102a43;
    --gold: #d4af65;
    --background: #f7f9f8;
    --border: #e2e8f0;
}

/* Global */
body {
    background: var(--background);
    color: #334155;
    font-family: "Segoe UI", Arial, sans-serif;
    line-height: 1.75;
}

.pkp_structure_page {
    background: #ffffff;
}

/* Header */
.pkp_structure_head {
    background: #ffffff;
    border-top: 4px solid var(--primary);
    border-bottom: 1px solid var(--border);
}

.pkp_site_name > a {
    color: var(--navy);
    font-weight: 800;
    text-decoration: none;
}

/* Navigation */
.pkp_navigation_primary_wrapper {
    background: #ffffff;
    border-top: 1px solid #f1f5f9;
}

.pkp_navigation_primary > li > a {
    color: var(--navy);
    font-weight: 600;
    transition: all .2s ease;
}

.pkp_navigation_primary > li > a:hover {
    color: var(--primary);
    background: #eaf6f0;
    border-radius: 7px;
}

/* Main content */
.pkp_structure_content {
    padding-top: 32px;
    padding-bottom: 48px;
}

.pkp_structure_main h1,
.pkp_structure_main h2,
.pkp_structure_main h3 {
    color: var(--navy);
    font-weight: 750;
    line-height: 1.4;
}

/* Homepage image */
.pkp_page_index .homepage_image img {
    display: block;
    width: 100%;
    height: auto;
    max-height: 420px;
    object-fit: cover;
    object-position: center;
    border-radius: 14px;
    box-shadow: 0 12px 32px rgba(16, 42, 67, .12);
}

/* Journal description */
.pkp_page_index .additional_content {
    margin-top: 28px;
}

/* Article cards */
.obj_article_summary {
    margin-bottom: 22px;
    padding: 24px;
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: 14px;
    box-shadow: 0 5px 20px rgba(16, 42, 67, .04);
    transition: transform .2s ease, box-shadow .2s ease;
}

.obj_article_summary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 28px rgba(16, 42, 67, .09);
}

.obj_article_summary .title a {
    color: var(--navy);
    font-weight: 700;
    text-decoration: none;
}

.obj_article_summary .title a:hover {
    color: var(--primary);
}

/* Current issue */
.current_issue {
    padding: 26px;
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: 16px;
    box-shadow: 0 8px 28px rgba(16, 42, 67, .05);
}

/* Sidebar */
.pkp_structure_sidebar .pkp_block {
    margin-bottom: 22px;
    padding: 20px;
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: 12px;
}

/* Buttons */
.pkp_button,
.cmp_button,
input[type="submit"] {
    border-radius: 8px;
}

.pkp_button:hover,
.cmp_button:hover,
input[type="submit"]:hover {
    filter: brightness(.92);
}

/* Footer */
.pkp_structure_footer_wrapper {
    background: var(--navy);
    border-top: 4px solid var(--gold);
    color: #ffffff;
}

.pkp_structure_footer a {
    color: #e8d29c;
}

/* Responsive */
@media (max-width: 768px) {
    .pkp_structure_content {
        padding-top: 20px;
        padding-bottom: 30px;
    }

    .pkp_page_index .homepage_image img {
        max-height: 240px;
        border-radius: 9px;
    }

    .obj_article_summary,
    .current_issue {
        padding: 16px;
    }

    .pkp_structure_sidebar .pkp_block {
        padding: 16px;
    }
}