* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; background: #f5f5f5; }

/* ===================== TOP BAR ===================== */
.top-bar { background: #1a365d; color: white; padding: 8px 0; font-size: 12px; }
.top-bar-container { max-width: 1400px; margin: 0 auto; padding: 0 20px; display: flex; justify-content: space-between; align-items: center; }
.top-bar a { color: white; text-decoration: none; margin-left: 15px; }
.top-bar a:hover { text-decoration: underline; }

/* ===================== HEADER ===================== */
header {
    background-image: url('../images/banner.jpg');
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    color: white;
    padding: 50px 0;
    position: relative;
    overflow: hidden;
    width: 100%;
    box-shadow: inset 0 0 0 2000px rgba(10, 25, 49, 0.6);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
    z-index: 5;
    gap: 20px;
}

.logo-section { display: flex; align-items: center; gap: 20px; }

.logo-img {
    width: 90px; height: 90px;
    background: white; border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    font-size: 48px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.3);
    flex-shrink: 0;
}

.logo-img img { width: 100%; height: 100%; object-fit: contain; padding: 5px; }

.journal-title h1 {
    font-size: 28px; font-weight: 800;
    text-transform: uppercase; letter-spacing: -0.5px;
    margin-bottom: 5px;
}

.journal-title p { font-size: 14px; opacity: 0.85; max-width: 600px; line-height: 1.4; }

.issn-text {
    display: block; margin-top: 8px;
    font-weight: 600; font-family: monospace;
    font-size: 15px; color: #ffd700;
}

.header-badge {
    background: #f59e0b;
    padding: 12px 20px; border-radius: 8px;
    font-weight: bold; font-size: 14px;
    text-align: center; color: white;
    box-shadow: 0 4px 15px rgba(245,158,11,0.3);
    flex-shrink: 0;
}

/* ===================== NAVIGATION ===================== */
nav {
    background: #2c5aa0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: sticky; top: 0; z-index: 1000;
}

.nav-container {
    max-width: 1400px; margin: 0 auto; padding: 0 20px;
    display: flex; justify-content: space-between; align-items: center;
}

.nav-links { display: flex; list-style: none; flex-wrap: wrap; }
.nav-links li { position: relative; }
.nav-links a {
    color: white; text-decoration: none;
    padding: 15px 18px; display: block;
    font-weight: 500; font-size: 14px;
    transition: background 0.3s;
    white-space: nowrap;
}
.nav-links a:hover, .nav-links a.active { background: #1e4080; }

.search-btn {
    background: white; color: #2c5aa0;
    border: none; padding: 8px 18px;
    border-radius: 5px; cursor: pointer;
    font-weight: 600; font-size: 14px;
    transition: all 0.3s; white-space: nowrap;
}
.search-btn:hover { transform: translateY(-2px); box-shadow: 0 4px 10px rgba(255,255,255,0.3); }

/* Hamburger Button - Mobile Only */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 8px;
    gap: 5px;
    background: none;
    border: 2px solid white;
    border-radius: 6px;
    margin-left: 10px;
}
.hamburger span {
    width: 22px; height: 3px;
    background: white; border-radius: 3px;
    transition: all 0.3s;
    display: block;
}

/* ===================== PAGE CONTAINER ===================== */
.page-container { max-width: 1400px; margin: 30px auto; padding: 0 20px; }
.page-header {
    background: white; padding: 30px 40px;
    border-radius: 8px; box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 30px;
}
.page-header h1 {
    font-size: 32px; color: #1a365d;
    margin-bottom: 10px;
    border-bottom: 4px solid #2c5aa0; padding-bottom: 15px;
}

/* ===================== CONTENT GRID ===================== */
.content-grid { display: grid; grid-template-columns: 1fr 320px; gap: 30px; }
.main-container { max-width: 1400px; margin: 30px auto; padding: 0 20px; display: grid; grid-template-columns: 1fr 320px; gap: 30px; }
.main-content { background: white; padding: 40px; border-radius: 8px; box-shadow: 0 2px 10px rgba(0,0,0,0.1); }

/* ===================== CONTENT SECTIONS ===================== */
.content-section { margin-bottom: 40px; }
.content-section h2 { font-size: 24px; color: #2c5aa0; margin-bottom: 20px; font-weight: 700; padding-bottom: 10px; border-bottom: 2px solid #e5e5e5; }
.content-section h3 { font-size: 20px; color: #1a365d; margin: 25px 0 15px 0; font-weight: 700; }
.content-section p { text-align: justify; line-height: 1.8; margin-bottom: 15px; color: #444; }
.content-section ul { margin-left: 25px; margin-bottom: 20px; }
.content-section li { margin-bottom: 12px; line-height: 1.8; color: #444; }

.highlight-box { background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%); padding: 25px; border-radius: 8px; border-left: 4px solid #2c5aa0; margin: 25px 0; }
.highlight-box h3 { color: #1a365d; margin-bottom: 15px; }

/* ===================== SIDEBAR ===================== */
.sidebar { display: flex; flex-direction: column; gap: 20px; }
.sidebar-box { background: white; padding: 20px; border-radius: 8px; box-shadow: 0 2px 10px rgba(0,0,0,0.1); }
.sidebar-box h3 { font-size: 16px; color: white; background: #2c5aa0; padding: 12px 15px; margin: -20px -20px 20px -20px; border-radius: 8px 8px 0 0; font-weight: 700; }
.sidebar-box img { width: 100%; border-radius: 8px; margin-bottom: 15px; }
.sidebar-box p { font-size: 14px; line-height: 1.6; color: #666; }

.sidebar-links { list-style: none; }
.sidebar-links li { border-bottom: 1px solid #e5e5e5; }
.sidebar-links li:last-child { border-bottom: none; }
.sidebar-links li a { display: flex; align-items: center; padding: 12px 15px; color: #444; text-decoration: none; font-size: 14px; transition: 0.3s; }
.sidebar-links li a i { color: #2c5aa0; margin-right: 12px; font-size: 16px; transition: 0.3s; }
.sidebar-links li a:hover { background: #f8fbff; color: #2c5aa0; }
.sidebar-links li a:hover i { transform: translateX(5px); }

/* ===================== HOME PAGE ===================== */
.welcome-container-flex { display: flex; align-items: flex-start; gap: 40px; justify-content: space-between; margin-top: 20px; }
.welcome-section { flex: 1; }
.welcome-section h2 { font-size: 28px; color: #1a365d; margin-bottom: 20px; }
.welcome-section h2 span { color: #2c5aa0; font-weight: 700; }
.welcome-section h3 { font-size: 20px; color: #2c5aa0; margin: 25px 0 15px 0; font-weight: 700; }
.welcome-section p { text-align: justify; line-height: 1.8; margin-bottom: 15px; color: #444; }
.hero-section { flex: 0 0 320px; display: flex; justify-content: flex-end; }
.cover-image-box { width: 100%; max-width: 300px; filter: drop-shadow(15px 15px 25px rgba(0,0,0,0.3)); }
.actual-cover-img { width: 100%; height: auto; display: block; border-radius: 4px; }

/* ===================== INFO TABLE ===================== */
.info-table-section { margin: 40px 0; border: 2px solid #2c5aa0; border-radius: 8px; overflow: hidden; }
.info-table { width: 100%; border-collapse: collapse; }
.info-table td { padding: 14px 20px; border: 1px solid #2c5aa0; font-size: 15px; }
.info-table td:first-child { background-color: #2c5aa0; color: white; font-weight: 700; width: 35%; }
.info-table td:last-child { color: #1a365d; font-weight: 600; background-color: #f0f7ff; }
.info-table tr:hover td:last-child { background-color: #e1efff; }

/* ===================== INDEXING ===================== */
.indexing-section { margin: 40px 0; }
.indexing-section h3 { font-size: 22px; color: #1a365d; margin-bottom: 25px; border-left: 5px solid #2c5aa0; padding-left: 15px; font-weight: 700; }
.indexing-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 15px; }
.index-card { background: #fdfdfd; border: 1px solid #d1d9e0; border-left: 4px solid #2c5aa0; padding: 20px 15px; border-radius: 4px; transition: all 0.2s; }
.index-card:hover { background: #fff; box-shadow: 0 4px 12px rgba(0,0,0,0.1); }
.index-info strong { display: block; font-size: 15px; color: #1a365d; margin-bottom: 5px; text-transform: uppercase; }
.index-info p { font-size: 12px; color: #555; margin: 0; line-height: 1.4; }

/* ===================== CURRENT ISSUE ===================== */
.issue-header { background: white; padding: 40px; border-radius: 8px; box-shadow: 0 2px 10px rgba(0,0,0,0.1); margin-bottom: 30px; }
.issue-header-content { display: grid; grid-template-columns: 230px 1fr; gap: 40px; align-items: center; }
.issue-cover { width: 230px; height: 320px; background: linear-gradient(135deg, #2c5aa0 0%, #1e4080 100%); border-radius: 10px; display: flex; flex-direction: column; align-items: center; justify-content: center; color: white; padding: 25px; box-shadow: 0 8px 25px rgba(44,82,130,0.3); }
.issue-cover .icon { font-size: 70px; margin-bottom: 15px; }
.issue-cover h3 { font-size: 22px; text-align: center; margin-bottom: 10px; }
.issue-cover p { text-align: center; opacity: 0.9; font-size: 14px; }
.issue-info h1 { font-size: 32px; color: #1a365d; margin-bottom: 12px; }
.issue-info .meta { color: #666; font-size: 15px; margin-bottom: 15px; }
.issue-info .description { color: #555; line-height: 1.8; margin-bottom: 15px; }
.issue-stats { display: flex; gap: 25px; margin-top: 20px; flex-wrap: wrap; }
.stat { text-align: center; }
.stat-number { font-size: 26px; font-weight: bold; color: #2c5aa0; display: block; }
.stat-label { font-size: 13px; color: #666; }

/* ===================== ARTICLES ===================== */
.article-item { padding: 30px 0; border-bottom: 2px solid #e5e5e5; }
.article-item:last-child { border-bottom: none; }
.article-number { font-size: 13px; color: #999; font-weight: 600; margin-bottom: 8px; }
.article-title { font-size: 20px; color: #2c5aa0; margin-bottom: 10px; font-weight: 700; line-height: 1.4; }
.article-title a { color: #2c5aa0; text-decoration: none; }
.article-title a:hover { color: #1e4080; text-decoration: underline; }
.article-authors { color: #666; font-size: 14px; margin-bottom: 10px; font-weight: 500; }
.article-meta { display: flex; gap: 15px; flex-wrap: wrap; margin-bottom: 12px; font-size: 13px; color: #888; }
.article-abstract { color: #555; line-height: 1.8; margin-bottom: 18px; text-align: justify; }
.article-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
.action-btn { background: #2c5aa0; color: white; padding: 9px 18px; border-radius: 6px; text-decoration: none; font-size: 13px; font-weight: 600; transition: all 0.3s; display: inline-block; }
.action-btn:hover { background: #1e4080; transform: translateY(-2px); box-shadow: 0 4px 10px rgba(44,82,130,0.3); }
.action-btn.secondary { background: #6c757d; }
.action-btn.secondary:hover { background: #5a6268; }
.article-metrics { display: flex; gap: 20px; align-items: center; padding: 12px 18px; background: #f8f9fa; border-radius: 6px; flex-wrap: wrap; }
.metric { display: flex; align-items: center; gap: 6px; font-size: 13px; color: #666; }
.doi { margin-left: auto; }
.doi a { color: #2c5aa0; text-decoration: none; font-weight: 600; }

/* ===================== EDITORIAL BOARD ===================== */
.editor-section { margin-bottom: 50px; }
.editor-section h2 { font-size: 28px; color: #2c5aa0; margin-bottom: 30px; padding-bottom: 15px; border-bottom: 3px solid #2c5aa0; }
.board-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 25px; margin-bottom: 40px; }
.board-member { background: #f8f9fa; padding: 25px; border-radius: 12px; text-align: center; border: 2px solid #e9ecef; transition: all 0.3s; }
.board-member:hover { border-color: #2c5aa0; transform: translateY(-6px); box-shadow: 0 12px 25px rgba(44,82,130,0.2); }
.member-photo { width: 130px; height: 130px; margin: 0 auto 15px; border-radius: 50%; overflow: hidden; border: 4px solid #2c5aa0; box-shadow: 0 4px 15px rgba(0,0,0,0.2); }
.member-photo img { width: 100%; height: 100%; object-fit: cover; }
.photo-placeholder { width: 100%; height: 100%; background: linear-gradient(135deg, #2c5aa0 0%, #1e4080 100%); display: flex; align-items: center; justify-content: center; color: white; font-size: 42px; font-weight: bold; }
.member-name { font-size: 18px; font-weight: 700; color: #1a365d; margin-bottom: 6px; }
.member-position { font-size: 14px; color: #2c5aa0; font-weight: 600; margin-bottom: 10px; }
.member-affiliation { font-size: 13px; color: #666; margin-bottom: 12px; line-height: 1.6; }
.chief-editor { background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 50%); border-color: #f59e0b; }
.chief-editor .member-photo { border-color: #f59e0b; }

/* ===================== FORMS ===================== */
.form-container { background: white; padding: 40px; border-radius: 8px; box-shadow: 0 2px 10px rgba(0,0,0,0.1); }
.form-section { margin-bottom: 35px; }
.form-section h2 { font-size: 22px; color: #1a365d; margin-bottom: 20px; padding-bottom: 10px; border-bottom: 2px solid #2c5aa0; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-weight: 600; color: #333; margin-bottom: 8px; font-size: 15px; }
.form-group label .required { color: #dc2626; }
.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group input[type="url"],
.form-group textarea,
.form-group select { width: 100%; padding: 12px 15px; border: 2px solid #e9ecef; border-radius: 6px; font-size: 14px; font-family: inherit; transition: all 0.3s; }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { outline: none; border-color: #2c5aa0; box-shadow: 0 0 0 3px rgba(44,82,130,0.1); }
.form-group textarea { resize: vertical; min-height: 120px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.submit-btn { background: linear-gradient(135deg, #2c5aa0 0%, #1e4080 100%); color: white; border: none; padding: 15px 50px; border-radius: 8px; font-size: 18px; font-weight: 600; cursor: pointer; transition: all 0.3s; width: 100%; }
.submit-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(44,82,130,0.3); }

/* ===================== CONTACT ===================== */
.contact-box { background: #f8f9fa; padding: 20px; border-radius: 8px; border: 2px solid #2c5aa0; text-align: center; }
.contact-box h4 { color: #1a365d; margin-bottom: 15px; font-size: 16px; }
.contact-box p { font-size: 13px; line-height: 1.8; margin-bottom: 10px; color: #555; }
.contact-box a { color: #2c5aa0; text-decoration: none; font-weight: 600; }
.whatsapp-btn { background: #25D366; color: white; padding: 12px 20px; border-radius: 8px; text-decoration: none; display: inline-block; margin-top: 15px; font-weight: 600; transition: all 0.3s; }
.whatsapp-btn:hover { background: #128C7E; transform: translateY(-2px); }
.view-all-btn { text-align: center; margin-top: 30px; }
.view-all-btn a { background: linear-gradient(135deg, #2c5aa0 0%, #1e4080 100%); color: white; padding: 15px 40px; border-radius: 8px; text-decoration: none; font-size: 16px; font-weight: 600; display: inline-block; transition: all 0.3s; }

/* ===================== FOOTER ===================== */
footer { background: #1a365d; color: white; text-align: center; padding: 40px 20px; margin-top: 50px; }
footer p { margin-bottom: 10px; font-size: 14px; }
footer a { color: #f59e0b; text-decoration: none; }
footer a:hover { text-decoration: underline; }

/* ===================== SIDE ARROW ===================== */
.side-arrow { width: 10px; height: auto; margin-right: 12px; filter: invert(34%) sepia(85%) saturate(541%) hue-rotate(182deg) brightness(92%) contrast(89%); }

/* ===================== HELP BOX ===================== */
.help-box { background: #e0f2fe; padding: 20px; border-radius: 8px; border-left: 4px solid #0284c7; }
.help-box h4 { color: #075985; margin-bottom: 10px; }
.help-box p { color: #0c4a6e; font-size: 14px; line-height: 1.6; }
.help-box a { color: #0284c7; font-weight: 600; text-decoration: none; }

/* ===================== INFO BOX ===================== */
.info-box { background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%); padding: 25px; border-radius: 8px; border-left: 4px solid #f59e0b; margin-bottom: 30px; }
.info-box h3 { color: #92400e; margin-bottom: 15px; font-size: 18px; }
.info-box ul { margin-left: 20px; color: #78350f; }
.info-box li { margin-bottom: 8px; }


/* ================================================
   RESPONSIVE - TABLET (max 1024px)
   ================================================ */
@media (max-width: 1024px) {
    .content-grid { grid-template-columns: 1fr; }
    .main-container { grid-template-columns: 1fr; }
    .issue-header-content { grid-template-columns: 1fr; text-align: center; }
    .issue-cover { margin: 0 auto; }
    .indexing-grid { grid-template-columns: repeat(2, 1fr); }
    .form-row { grid-template-columns: 1fr; }
    .welcome-container-flex { flex-direction: column; align-items: center; }
    .hero-section { flex: 0 0 auto; }
    .issue-stats { justify-content: center; }
}


/* ================================================
   RESPONSIVE - MOBILE (max 768px)
   ================================================ */
@media (max-width: 768px) {

    /* Header */
    header { padding: 25px 0; }
    .header-container { flex-direction: column; text-align: center; gap: 15px; }
    .logo-section { flex-direction: column; align-items: center; }
    .logo-img { width: 75px; height: 75px; font-size: 38px; }
    .journal-title h1 { font-size: 20px; }
    .journal-title p { font-size: 13px; }
    .issn-text { font-size: 14px; }
    .header-badge { display: none; }

    /* Nav - Hamburger */
    .hamburger { display: flex; }
    nav { position: relative; }
    .nav-container { padding: 8px 15px; }
    .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
        background: #1e4080;
        position: absolute;
        top: 100%;
        left: 0;
        z-index: 9999;
        box-shadow: 0 4px 10px rgba(0,0,0,0.3);
    }
    .nav-links.open { display: flex; }
    .nav-links a { padding: 14px 20px; border-bottom: 1px solid rgba(255,255,255,0.1); font-size: 15px; }
    .nav-container > div { margin-left: auto; display: flex; align-items: center; gap: 8px; }
    .search-toggle { padding: 7px 14px; font-size: 13px; }

    /* Page content */
    .page-header { padding: 20px; }
    .page-header h1 { font-size: 24px; }
    .main-content { padding: 20px; }
    .form-container { padding: 20px; }

    /* Issue page */
    .issue-header { padding: 20px; }
    .issue-cover { width: 180px; height: 250px; }
    .issue-info h1 { font-size: 22px; }
    .issue-stats { gap: 15px; }
    .stat-number { font-size: 22px; }
    .article-metrics { flex-direction: column; align-items: flex-start; }
    .doi { margin-left: 0; }

    /* Board */
    .board-grid { grid-template-columns: 1fr; }

    /* Indexing */
    .indexing-grid { grid-template-columns: 1fr; }

    /* Contact */
    .contact-wrapper { grid-template-columns: 1fr; }
}

/* ================================================
   RESPONSIVE - SMALL MOBILE (max 480px)
   ================================================ */
@media (max-width: 480px) {
    .journal-title h1 { font-size: 17px; }
    .logo-img { width: 65px; height: 65px; font-size: 32px; }
    .action-btn { padding: 8px 14px; font-size: 12px; }
    .article-title { font-size: 17px; }
    .issue-stats { flex-direction: column; align-items: center; gap: 10px; }
    .top-bar-container { flex-direction: column; gap: 5px; text-align: center; }
}