```css
/* =========================================================
   IJIMEAM Journal Custom Stylesheet
   International Journal of Innovation in Mechanical Engineering 
   and Advanced Materials
   Publisher: Universitas Mercu Buana
   ========================================================= */

/* ---------- General Layout ---------- */
body {
    font-family: "Segoe UI", Arial, Helvetica, sans-serif;
    font-size: 15px;
    line-height: 1.65;
    color: #222;
    background-color: #ffffff;
}

a {
    color: #005f99;
    text-decoration: none;
}

a:hover {
    color: #003f66;
    text-decoration: underline;
}

/* ---------- Header ---------- */
.pkp_structure_head {
    background-color: #003366;
    border-bottom: 4px solid #f2b705;
}

.pkp_site_name,
.pkp_site_name a {
    color: #ffffff;
    font-weight: 700;
    letter-spacing: 0.3px;
}

.pkp_navigation_primary > li > a {
    color: #ffffff;
    font-weight: 600;
}

.pkp_navigation_primary > li > a:hover {
    background-color: #005f99;
    color: #ffffff;
}

/* ---------- Page Title ---------- */
.page_title,
h1 {
    color: #003366;
    font-weight: 700;
    border-bottom: 2px solid #f2b705;
    padding-bottom: 8px;
    margin-bottom: 20px;
}

h2, h3, h4 {
    color: #003366;
    font-weight: 600;
}

/* ---------- Main Content ---------- */
.pkp_structure_main {
    background-color: #ffffff;
}

.obj_article_summary,
.obj_issue_summary {
    border-bottom: 1px solid #ddd;
    padding: 18px 0;
}

.obj_article_summary .title a {
    color: #003366;
    font-weight: 700;
}

.obj_article_summary .title a:hover {
    color: #005f99;
}

/* ---------- Buttons ---------- */
.cmp_button,
.cmp_form .buttons button,
.page_lost_password .buttons button,
.page_search .submit button {
    background-color: #003366;
    color: #ffffff;
    border: none;
    border-radius: 4px;
    padding: 8px 16px;
    font-weight: 600;
}

.cmp_button:hover,
.cmp_form .buttons button:hover,
.page_lost_password .buttons button:hover,
.page_search .submit button:hover {
    background-color: #005f99;
    color: #ffffff;
}

/* ---------- Sidebar ---------- */
.pkp_structure_sidebar .pkp_block {
    border: 1px solid #ddd;
    border-top: 4px solid #003366;
    padding: 15px;
    margin-bottom: 20px;
    background-color: #f9f9f9;
}

.pkp_block .title {
    color: #003366;
    font-weight: 700;
    font-size: 16px;
    margin-bottom: 10px;
}

/* ---------- Article Details ---------- */
.obj_article_details .page_title {
    color: #003366;
}

.obj_article_details .authors {
    font-size: 15px;
    color: #444;
}

.obj_article_details .abstract {
    text-align: justify;
}

.obj_article_details .item {
    margin-bottom: 20px;
}

/* ---------- Tables ---------- */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 18px 0;
}

table th {
    background-color: #003366;
    color: #ffffff;
    font-weight: 600;
    padding: 10px;
    border: 1px solid #ddd;
}

table td {
    padding: 10px;
    border: 1px solid #ddd;
}

table tr:nth-child(even) {
    background-color: #f7f7f7;
}

/* ---------- Forms ---------- */
input[type="text"],
input[type="email"],
input[type="password"],
textarea,
select {
    border: 1px solid #ccc;
    border-radius: 4px;
    padding: 8px;
}

input:focus,
textarea:focus,
select:focus {
    border-color: #005f99;
    outline: none;
}

/* ---------- Footer ---------- */
.pkp_structure_footer {
    background-color: #003366;
    color: #ffffff;
    padding: 25px 0;
}

.pkp_structure_footer a {
    color: #f2b705;
}

.pkp_structure_footer a:hover {
    color: #ffffff;
}

/* ---------- Announcements / Notices ---------- */
.cmp_notification,
.announcement_summary {
    border-left: 5px solid #f2b705;
    background-color: #f8f9fb;
    padding: 15px;
    margin-bottom: 20px;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
    body {
        font-size: 14px;
    }

    .pkp_navigation_primary > li > a {
        color: #003366;
    }

    table {
        font-size: 13px;
    }
}
```